CN102909710B - Power tool - Google Patents
Power tool Download PDFInfo
- Publication number
- CN102909710B CN102909710B CN201210166388.3A CN201210166388A CN102909710B CN 102909710 B CN102909710 B CN 102909710B CN 201210166388 A CN201210166388 A CN 201210166388A CN 102909710 B CN102909710 B CN 102909710B
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- Prior art keywords
- output shaft
- working head
- power tool
- connecting axle
- radial
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B45/00—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor
- B23B45/02—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor driven by electric power
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F3/00—Associations of tools for different working operations with one portable power-drive means; Adapters therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/001—Gearings, speed selectors, clutches or the like specially adapted for rotary tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/003—Stops for limiting depth in rotary hand tools
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automatic Tool Replacement In Machine Tools (AREA)
- Retarders (AREA)
- Transmission Devices (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
- Harvester Elements (AREA)
- Manipulator (AREA)
Abstract
The invention relates to a power tool. The power tool comprises a case, a motor, an output shaft, a transmission mechanism, a working head supporting mechanism and a connecting shaft, wherein the motor is arranged in the case and outputs rotation power; the output shaft is provided with housing holes which are axially formed and are used for containing working heads; the working heads are provided with torque stressed parts with polygonal sections; the transmission mechanism is arranged between the motor and the output shaft and can transmit the rotation power output by the motor to the output shaft; the working head supporting mechanism is provided with a plurality of parallel housing spaces for supporting working heads; the connecting shaft is arranged in the case and can enable the working heads to be in working positions in the housing holes or in housing positions of the working head supporting mechanism; the housing holes comprise torque transmission parts and calibration parts; the torque transmission parts can limit the working heads to rotate relative to the output shaft; the output shaft is provided with elastic pressing devices; the elastic pressing devices at least partially extend into the calibration parts; and when entering the torque transmission parts from the calibration parts, the working heads can rotate relative to the output shaft under the action of the elastic pressing devices.
Description
Technical field
The present invention relates to a kind of power tool, particularly relate to and a kind ofly realize the storage of working head and quick-replaceable drill gun class power tool.
Background technology
In existing drill gun class power tool, generally include electric drill, electric screw driver and percussion drill.
Electric screw driver be for by screw-driving to a kind of conventional electric tool on workpiece.In time needing the screw tightening different size in use procedure, change different working heads according to the difference of screw specification, namely screwdriver bit, namely the original working head installed will be taken off, then load onto the working head of another kind of structure.Under the use occasion needing frequent replacing working head, bring great inconvenience to operator, cause replacing working head on the one hand loaded down with trivial details, easy loss placed everywhere by the working head taken off on the other hand.Although, in some hand-operated tools, have some storage that can realize working head and quick-replaceables, due to the inherent defect of hand-operated tools, namely moment of torsion is little, and operation is hard, makes operator be easy to fatigue, cause inefficiency, be not suitable for using as the instrument of specialty in industrial sector.
Chinese utility model patent CN201086280Y discloses a kind of Multi-tool head electric tool, comprise power tool body and multi-knife-head rotaring wheel structure, multi-knife-head rotaring wheel structure comprises the multi-knife-head runner cylinder that can be accommodated multiple cutter head, multi-knife-head runner cylinder can be connected with tool body in axial sliding, when multi-knife-head runner cylinder slides into the position away from tool body, by rotating multi-knife-head runner cylinder thus the cutter head of selection needs.But when multi-knife-head runner cylinder is away from tool body, its connecting axle is exposed, the inside of electric tool inside or multi-knife-head runner cylinder is entered in the process that dust, powder can slide at multi-knife-head runner cylinder, time has been grown and multi-knife-head runner cylinder can have been caused to rotate carry out cutter head selection, or directly causes electric tool to use.And working head is against on workpiece when work, such connecting axle needs to bear reciprocal active force, and connecting axle can bring pressure to transmission mechanism thus transmission mechanism can not be delivered to connecting axle moment of torsion.
In addition; due to electric tool randomness in use; when therefore shutting down, on connecting axle, the angle of the barrel of installment work head is uncertain; and the angle that runner cylinder return by working head is also uncertain; so in the process changing working head; just likely there is the angle of barrel and the dislocation of working head angle of connecting axle, cause working head cannot enter the situation of connecting axle correctly, smoothly.Chinese utility model patent CN201086280Y further discloses multi-knife-head runner cylinder and switch gearing, when multi-knife-head runner cylinder slides into the position away from tool body, by rotating multi-knife-head runner cylinder thus the cutter head of selection needs; When tool body is got back in the slip of multi-knife-head runner cylinder, it drives gangbar to move, and gangbar can press switch and make machine operation, rotates a certain angle and sleeve angle is matched with cutter head angle.On the one hand, regular starter motor in short-term easily causes electrical machinery life to shorten or damage; Multi-knife-head runner cylinder and switch gearing need accurately positioning control on the other hand, and cost is higher.
Summary of the invention
For the deficiencies in the prior art, the object of the present invention is to provide a kind of power tool of reliable operation.
The technical solution adopted for the present invention to solve the technical problems is: a kind of power tool, comprising: casing; Motor, is arranged in casing, and outputting rotary power; Output shaft, have the accepting hole of the accommodation working head axially arranged, it is polygonal moment of torsion forced section that described working head has cross section; Transmission mechanism, is arranged between motor and output shaft and also the rotary power that motor exports can be passed to output shaft; Working head supporting mechanism, is arranged in casing, and described working head supporting mechanism has several receiving spaces be set up in parallel for support works head; Connecting axle, is arranged in casing and also working head can be made to be in the operating position being positioned at accepting hole or the collecting position being positioned at working head supporting mechanism; Described accepting hole comprises torque transfer part and correction unit, described torque transfer part can limit working head and rotate relative to output shaft, described output shaft is provided with elasticity pressing device, described elasticity pressing device stretches in described correction unit at least partly, when working head enters torque transfer part by correction unit, described working head can rotate relative to output shaft by the effect of elasticity pressing device.
Preferably, described torque transfer part comprises at least one radial protrusion, at least one radial protrusion described and described moment of torsion forced section against and limit working head and rotate relative to output shaft.
Preferably, described torque transfer part comprises 12 radial protrusions evenly arranged, described 12 radial convexes contact with described moment of torsion forced section and limit working head and rotate relative to output shaft, and the junction surface extension line vertically that described elasticity pressing device stretches into the part of the described correction unit radial protrusion adjacent with two in described 12 radial protrusions aligns.
Preferably, described torque transfer part comprises six radial protrusions, described six radial protrusions are six angles of 12 jiaos of stars even setting diametrically wherein, and the part that described elasticity pressing device stretches into described correction unit is alignd with the extension line vertically of in described six radial protrusions.
Preferably, arc transition is passed through between every two radial protrusions of described six radial protrusions.
Preferably, described torque transfer part is the regular polygon that the cross section of cross section and described moment of torsion forced section matches, and at least one side extended surface vertically of part and torque transfer part that described elasticity pressing device stretches into described correction unit aligns.
Preferably, the cross section of described torque transfer part and the cross section of described moment of torsion forced section are the regular hexagon matched.
Preferably, described elasticity pressing device comprises part and stretches into press part in described correction unit and flexible member, and described flexible member is along output shaft radially-inwardly press part described in bias voltage.
Preferably, described flexible member is the C type shell fragment arranged around described output shaft, and described press part is arranged at the both sides of described C type shell fragment opening.
Preferably, described flexible member is the shell fragment axially arranged along output shaft, and one end of described shell fragment is fixed relative to casing, pressure section described in the other end bias voltage of described shell fragment.
Preferably, described elasticity pressing device comprises flexible member, and described flexible member has the pressure section stretched in described correction unit, and described pressure section can be between free state and bias state along output shaft radial motion at described flexible member.
Preferably, described flexible member comprises at least one and is positioned at the C-type steel silk arranged around described output shaft, and described pressure section is arranged at the both sides of described C-type steel silk opening.
Preferably, described C-type steel silk arranges two, distributes along output shaft axially spaced-apart.
Preferably, two pressure sections of described two C-type steel silks circumferentially stagger setting.
Preferably, described flexible member is the shell fragment axially arranged along output shaft, and one end of described shell fragment is fixed relative to casing, and described pressure section is arranged at the other end of described shell fragment.
Preferably, described connecting axle is connected between transmission mechanism and output shaft, and the rotary power that motor exports is passed to output shaft by described connecting axle by described transmission mechanism.
Compared with prior art, the invention has the beneficial effects as follows: in the process that power tool of the present invention enables working head change by simple structure, working head enters output shaft smoothly, ensure that higher reliability, reduces cost simultaneously.
Accompanying drawing explanation
Fig. 1 be the power tool in preferred first embodiment of the present invention in running order time sectional view.
Fig. 2 is the part isometric exploded view of Fig. 1 medium power instrument.
Fig. 3 is the phantom along E-E line in Fig. 1.
Fig. 4 is the schematic cross-section of the working head of power tool of the present invention.
Fig. 5 is that schematic diagram is looked on the right side of the output shaft part of power tool in preferred first embodiment of the present invention, and wherein working head does not also enter output shaft.
Fig. 6 and Fig. 5 is similar, and wherein working head has just entered the correction unit of output shaft.
Fig. 7 and Fig. 5 is similar, and wherein working head with output shaft, relative rotation occurs under the effect of elasticity pressing device.
Fig. 8 and Fig. 5 is similar, and wherein working head enters the torque transfer part of output shaft.
Fig. 9 is the torque transfer part formation schematic diagram of the power tool output shaft in preferred second embodiment of the present invention, and wherein two orthohexagonals rotate 30 degree relatively.
Figure 10 is the profile schematic diagram of the torque transfer part of power tool output shaft in preferred second embodiment of the present invention.
Figure 11 is that schematic diagram is looked on the right side of the output shaft part of power tool in preferred second embodiment of the present invention, and wherein working head does not also enter output shaft.
Figure 12 and Figure 11 is similar, and wherein working head has just entered the correction unit of output shaft.
Figure 13 and Figure 11 is similar, and wherein working head enters the torque transfer part of output shaft.
Figure 14 is the profile schematic diagram of the torque transfer part of power tool output shaft in preferred 3rd embodiment of the present invention.
Figure 15 is the sectional view that the power tool in preferred second embodiment of the present invention is in when changing working head state.
Figure 16 is the phantom along F-F line in Figure 15, and wherein working head does not also enter output shaft.
Schematic diagram is looked on the right side of the output shaft part of the power tool in preferred 3rd embodiment of Figure 17 the present invention, and wherein working head has just entered the correction unit of output shaft.
Figure 18 and Figure 17 is similar, and wherein working head with output shaft, relative rotation occurs under the effect of elasticity pressing device.
Figure 19 and Figure 17 is similar, and wherein working head enters the torque transfer part of output shaft.
Figure 20 be the power tool in preferred 4th embodiment of the present invention in running order time phantom.
Figure 21 is the part isometric exploded view of Figure 20 medium power instrument.
Figure 22 be the power tool in preferred 5th embodiment of the present invention in running order time phantom.
Figure 23 be the power tool in preferred 6th embodiment of the present invention in running order time phantom.
Figure 24 be the power tool in preferred 7th embodiment of the present invention in running order time phantom, wherein working head has just entered the correction unit of output shaft.
Figure 25 and Figure 24 is similar, and wherein the first locking member crossed by working head.
Figure 26 and Figure 24 is similar, and wherein the second locking member crossed by working head.
Figure 27 and Figure 24 is similar, and wherein connecting axle crosses the first locking member.
Figure 28 and Figure 24 is similar, and wherein output shaft resets and working head can be driven to rotate.
Wherein,
1. casing 2. motor 3. transmission mechanism
4. output shaft 6. battery 7. press button
9. working head 11. handle 13. fore shell
15. gathering sill 21. motor shaft 22. gear-boxes
30. pinion gear mechanism 31. planetary gear reducing mechanism 40. sleeves
41,41a, 41b. accepting hole 42. radial protrusion 48. locating part
51. connecting axle 50. fixed blocks 52. store folder
53. slip lid 131. perforate 221. dividing plates
223. toothed wheel box cover plate 225. arched member 301. first gears
302. second gear 303. the 3rd gears 461,461a. torque transfer part
462,462a. correction unit 463,463a. radial direction through hole 464.C type shell fragment
465. press part 465a. protuberance 466.C shaped steel wires
467,467a. shell fragment 468. kink 481. first engaging portion
482. first release portion 483. first accepting groove 484. first locking members
485. second engaging portion 486. second release portion 487. second accepting grooves
488. second locking member 489. flexible member 521. working head collecting storehouses
531. guide rail
Detailed description of the invention
In the preferred embodiment of power tool of the present invention, power tool is powered screwdriver, pneumatic screw driver can be divided into according to the difference of power source, surge screwdriver and electric screw driver, also have direct current and dividing of exchanging in electric screw driver, the present invention is preferably specifically described for DC electric screwdriver.
Shown in Fig. 3, this DC electric screwdriver comprises casing 1, motor 2, battery 6, transmission mechanism 3, connecting axle 51, working head supporting mechanism and output shaft 4.Casing 1 is closed up by symmetrical two and half housings assembled by screw (not shown), its handle 11 part that there is horizontal component and arrange in obtuse angle with horizontal component, the preferred angle of the present invention, can be pleasant when such gripping handle 11 operates between 100 degree to 130 degree.Be provided with press button 7 on the top of handle 11 part, battery 6 is fixed on the rear portion of handle 11 part, and transmission mechanism 3 partial fixing is housed in the horizontal component of casing 1.As preferred embodiment, this battery 6 can be lithium ion battery.It should be noted that, here the general name of said lithium ion battery to be negative material the be rechargeable battery of elemental lithium, according to the difference of positive electrode, it can form many systems, as " lithium manganese " battery, and " lithium iron " battery etc.In the present embodiment, lithium ion battery to be a joint rated voltage be 3.6V(volt) lithium ion battery.Certainly, battery 6 also can be the battery types well known to those skilled in the art such as NI-G, ni-mh.
Transmission mechanism 3 comprises by (be rear with the right side of drawing) before backward the planetary gear reducing mechanism 31 and pinion gear mechanism 30 that are driven by motor 2, wherein pinion gear mechanism 30 is connected with connecting axle 51, and by connecting axle 51, the rotary motion of motor 2 is passed to output shaft 4.Wherein working head supporting mechanism is for storing different working heads, here working head mainly refers to Philip's head screw screwdriver bit, slot type screwdriver head, drill bit etc. that electric screw driver is conventional, move axially through working head supporting mechanism by operation connecting axle or leave working head supporting mechanism, just can quick-replaceable is different when electric screw driver is tightened or unclamped different screws working head.According to the composition of above electric screw driver, electric screw driver can be divided into by (be rear with the right side of drawing) before backward the motor part D arranging motor successively, the driving section C of transmission mechanism 3 is set, the storage part B of working head supporting mechanism is set and the efferent A of output shaft is set.
Motor in the preferred embodiment for the present invention is motor 2, and motor 2 has the motor shaft 21 extended forward from electric machine casing.Motor 2 is fixed in casing 1, one gear-box 22 to be fixed in casing 1 and to be positioned at the front portion of motor 2, gear-box 22 is for accommodating planetary gear reducing mechanism 31 and pinion gear mechanism 30, by arranging dividing plate 221 between planetary gear reducing mechanism 31 and pinion gear mechanism 30, the two is separated, and toothed wheel box cover plate 223 is set between gear-box 22 and working head supporting mechanism, transmission mechanism 3 and working head supporting mechanism can be separated like this, namely transmission mechanism 3 and working head supporting mechanism are separate.Pinion gear mechanism 30 comprises can the first gear 301 of being connected of transmitting torque with planetary gear reducing mechanism 31, the 3rd gear 303 be connected with connecting axle 51 and the second gear 302 engaged with the first gear 301 and the 3rd gear 303, the rotation of the first gear 301 is passed to the 3rd gear 303 by the second gear 302, and the two ends of each gear are supported by axle sleeve.The middle part of dividing plate 221 is provided with the hole supplying the axle of the first gear 301 to pass, the end face of dividing plate 221 is provided with the groove for installing axle sleeve, the rear axle housing supporting pinion gear mechanism 30 is fixed on dividing plate 221, front shaft sleeve is fixed on toothed wheel box cover plate 223, toothed wheel box cover plate 223 and gear-box 22 are fixedly linked by screw, buckle etc., so, namely pinion gear mechanism 30 and planetary gear reducing mechanism 31 can be separated, both can be closed again simultaneously, prevent dust, powder etc. from entering transmission mechanism 3 inner, also can prevent the leakage of lubricating oil.In addition, three gears are set just in order to make the inner space of instrument compacter, thus do not affect the attractive in appearance of outside.Certainly, also can be arranged to two gears as required, one is connected with planetary gear reducing mechanism 31, and another is connected with connecting axle 51.In addition, transmission mechanism 3 is not limited to above-described form, and transmission mechanism 3 can only include planetary gear reducing mechanism 31, or only includes pinion gear mechanism 30, or other rotary motion transmission mechanism, as ratchet mechanism, turbine mechanism etc.Wherein planetary gear reducing mechanism 31 has three grades of deceleration systems, motor shaft 21 extension is engaged with planetary gear reducing mechanism 31, rotary motion is passed to pinion gear mechanism 30 by planetary gear reducing mechanism 31, and pinion gear mechanism 30 drives connecting axle 51 to rotate, and connecting axle 51 again driver output axle rotates.When such motor 2 runs, by planetary gear reducing mechanism 31, pinion gear mechanism 30, finally exported by output shaft 4.This shows, the driving-chain in present embodiment is motor-transmission mechanism-connecting axle-output shaft, and namely connecting axle is as a part for driving-chain.In addition, reducing gear is made up of three stage planetary reduction and two-stage parallel axis deceleration system and obtains wanted output speed, in other embodiments, depending on the required rotating speed exported, reducing gear can only include two-stage planetary reduction system, or other deceleration systems.
Casing 1 is slidably connected with slip lid 53, and slip lid 53 can drive connecting axle 51 to move axially.The edge of slip lid 53 is provided with guide rail 531, and corresponding casing 1 is provided with gathering sill 15, and slip lid 53 is arranged in gathering sill 15 can be slid axially relative to casing 1 by its guide rail 531.Certainly, also can be that slip lid 53 arranges gathering sill, mode casing 1 being arranged guide rail makes slip lid move.
Connecting axle 51 is six square shafts, on connecting axle 51 axial restraint be provided with a fixed block 50, the rear end of connecting axle 51 is rotating to be against on fixed block 50, and slip lid 53 drives connecting axle 51 to move by the mode be connected with fixed block 50.Certainly, it is a lot of that slip lid 53 drives the mode of connecting axle 51 movement to also have, as the annular groove around its outer week Monday can be arranged on connecting axle 51, slip lid 53 is extend in annular groove by a pin or steel wire ring and is connected with connecting axle 51, so neither affect the rotation of connecting axle 51, also do not affect the movement that slip lid 53 drives connecting axle 51.The front end of connecting axle 51 is provided with magnet 511, for adsorbing working head 9, when selecting good berth head 9, can operate slip lid 53 drives connecting axle 51 through working head supporting mechanism, the magnet 511 that working head 9 is connected on axle 51 adsorbs, and under the promotion of connecting axle 51, leave working head supporting mechanism, enter output shaft 4.
Casing 1 comprises the fore shell 13 being connected to its front end, and a part for working head supporting mechanism is housed in fore shell 13, and another part is covered along with moving of slip lid 53 by slip lid 53 and exposes.The preferred working head supporting mechanism of the present invention is cylindric storage folder 52, conveniently rotates, and takes up room little simultaneously, can certainly be arranged to square, leg-of-mutton, strip, shelf-like etc.When electric screw driver work, slip lid 53 abuts with fore shell 13, storage folder 52 all can be closed with connecting axle 51 like this.On toothed wheel box cover plate 223, the position of corresponding connecting axle 51 is provided with the hole passed for connecting axle 51, gear-box 22 there is arched member 225 around connecting axle 51 Axis Extension, arched member 225 can be wholely set with gear-box 22, also can be provided separately, can by partially enclosed for connecting axle 51 by arranging arched member 225, when electric screw driver carries out change working head 9, namely the position that slip lid 53 moves to rearmost end also out exposed for connecting axle 51, can not can prevent the inside of the entering tool such as dust, powder like this.And toothed wheel box cover plate 223 extends to the end face of arched member 225, thus vertically by transmission mechanism 3 integrally closed together.In the course of the work, storage folder 52 can be closed by slip lid 53, thus prevent dust from entering, when working head changed by needs, remove slip lid 53 and can expose storage folder 52, the working head that convenient selection is different, slip lid 53 is so just needed to have certain length, when slip lid 53 moves to the operating position abutted with fore shell 13, slip lid 53 and storage part B and driving section C axial overlap, when slip lid 53 moves to the position of replaceable working head, slip lid 53 and motor part D axial overlap, and with driving section C part axial overlap.Certainly, the mode of slip lid 53 movement also has a lot, and such as slip lid 53 is rotatable to be installed on casing 1, rotates between two positions that covering stores folder 52 and exposes storage folder 52; Or be similar to the mode of sliding door, can open or close; Or pivotable be connected to mode of casing 1 etc., when can realize work, storage folder 52 is closed, need change working head time storage folder 52 is exposed.
Store that folder 52 is rotatable is supported between toothed wheel box cover plate 223 and output shaft 4, store on folder 52 and be evenly distributed with multiple working head collecting storehouse 521 along its circumferencial direction, that is working head has multiple receiving space, and multiple receiving space is set up in parallel along the rotation storing folder 52.Working head collecting storehouse 521 is closed along storage folder 52 is axially a part of, and a part of excircle opens wide, and such handled easily person selects the shape that can be easy to see from the part of opening wide working head 9 head during working head 9, thus selects the working head 9 of needs fast.Certainly, those skilled in the art are easy to expect, working head collecting storehouse 521 also can be totally enclosed, only need identify in the position of correspondence, or directly makes transparent by storage folder 52, can conveniently identify.In addition, elasticity location can be carried out between storage folder 52 and toothed wheel box cover plate 223, namely on the end face storing toothed wheel box cover plate 223 faced by folder 52, the position of corresponding working head 9 arranges locating slot 522, locating slot 522 is corresponding with collecting storehouse 521, toothed wheel box cover plate 223 is arranged the steel cap compressed by spring, or shell fragment, so, storage folder 52 often turns over a working head 9 steel cap or shell fragment all can send the voice prompt falling into locating slot 522, thus operator selects to avoid the angle of storage folder 52 rotation and connecting axle 51 to stagger during working head 9.
Coordinate with reference to Fig. 4, the cross section of conventional standard operation head shank is orthohexagonal, namely shank is formed as the moment of torsion forced section of working head, and output shaft 4 has the accepting hole 41 axially run through, accepting hole 41 is arranged to the form of the hexagonal hole matched with the moment of torsion forced section of working head, in it, installment work head makes working head be in operating position, thus realizes the transmission of moment of torsion.Certainly, working head also can the criteria of right and wrong, and namely the cross section of moment of torsion forced section is polygonal shape, corresponding accepting hole is arranged to the polygon matched with moment of torsion forced section, can realize the transmission of moment of torsion.Output shaft 4 is supported in the axial aperture 131 of fore shell 13 by an axle sleeve 40, and axle sleeve 40 provides radial support to output shaft 4, can certainly be realized the radial support of output shaft 4 by bearing.Connecting axle 51 of the present invention is also hexagon, hexagonal hole is provided with in 3rd gear 303, for connecting with connecting axle 51 and rotary power being passed to connecting axle 51, such connecting axle 51 inserts output shaft 4 and output shaft 4 can be driven to rotate, and then drive working head 9 to rotate by output shaft 4, the working head 9 of standard can be used like this, and without the need to offering the hole of collecting working head 9 on connecting axle 51, avoid the weight and volume of the excessive increase complete machine of connecting axle 51 diameter.Like this, what directly drive working head 9 to rotate is output shaft, shorten the distance of torque transfer, thus the use of instrument is more reliable.Above-described is that connecting axle moves the mode of working head rotation by output shaft indirect belt, but, those skilled in the art are easy to expect that other transmission means substitutes, such as connecting axle directly drives working head to rotate, namely connecting axle directly with working head can the mode of transmitting torque be connected, or output shaft is driven by direct geared, and connecting axle only stores folder for releasing working head and driving working head to get back to.
When working head 9 enters output shaft 4 under the drive of connecting axle 51, if hexagonal hole angle staggers in six side's external forms of working head 9 and output shaft 4, then working head 9 will be stuck and can not enter output shaft 4, can bring very large inconvenience like this to operator.In order to prevent this from occurring, the present invention is provided with elasticity pressing device on output shaft 4, enters in the process of output shaft adjusted by the relative position of elasticity pressing device to working head 9 and output shaft thus made working head 9 enter output shaft smoothly at working head 9.
Fig. 1 to Fig. 8 is the first embodiment of elasticity pressing device of the present invention, with reference to Fig. 3 to Fig. 5, the accepting hole 41 of output shaft 4 comprises the torque transfer part 461 driving working head to rotate and the correction unit 462 facilitating working head to enter vertically, correction unit 462 is circular hole, torque transfer part 461 is hexagonal hole, working head 9 can be facilitated like this to enter accepting hole 41, elasticity pressing device is arranged on the position of corresponding correction unit 462, comprise the radial direction through hole 463 be communicated with accepting hole 41, be housed in the press part 465 in radial direction through hole 463 and be set in the C type shell fragment 464 of radial bias voltage press part 465 on output shaft 4, press part 465 extend at least partly in the correction unit 462 of accepting hole 41 under the effect of C type shell fragment 464, and press part 465 is arranged at the position axially corresponding with the extended surface of one of them plane of the hexagonal hole of torque transfer part 461, like this when working head 9 enters correction unit 462, if a plane in six side's outer peripheral faces of working head 9 is axially corresponding with press part 465, so working head 9 can directly enter torque transfer part 461, with reference to Fig. 6 to Fig. 8, a plane in six side's outer peripheral faces of working head 9 and press part 465 axially stagger, so working head 9 enters correction unit 462 and radial compressing press part 465, press part 465 oppresses the elastic deformation of C type shell fragment 464, press part 465 is also subject to the opposition of C type shell fragment 464 simultaneously, press part 465 is again at the opposition lower compression working head 9 of C type shell fragment 464, make to produce between working head 9 and output shaft 4 relatively to rotate, a plane in six side's outer peripheral faces of working head 9 is axially corresponding with press part 465, now working head 9 and torque transfer part 461 match thus working head 9 can enter torque transfer part 461 smoothly, C type shell fragment 464 returns back to original state again.
Fig. 9 and Figure 13 gives the second embodiment of the present invention, the correction unit 462a of output shaft 4 is arranged to square hole, torque transfer part 461a is arranged to 12 jiaos of stars, 12 jiaos of stars in present embodiment are formed by two orthohexagonal phase differences 30 degree, like this, torque transfer part 461a has 12 to projecting inward radial protrusion 42, radial protrusion 42 can with the moment of torsion forced section of the working head 9 of six sides against and limit working head 9 and rotate relative to output shaft 4.The position that the junction surface extension line vertically that such press part 465 can be arranged at the radial protrusion adjacent with two aligns, like this when working head 9 enters correction unit 462a, if a plane in six side's outer peripheral faces of working head 9 is axially corresponding with press part 465, so working head 9 directly can enter torque transfer part 461a; With reference to Figure 12 and Figure 13, a plane in six side's outer peripheral faces of working head 9 and press part 465 axially stagger, and so working head 9 rotates to radial protrusion 42 relative to output shaft 4 and to fit with one of them face of working head 9 and just can enter torque transfer part 461a under the effect of press part 465 and C type shell fragment 464.According to above-mentioned setting, those skilled in the art are easy to expect, a radial protrusion 42 is at least set and just can realizes the rotation that output shaft drives working head, such radial protrusion 42 also can arrange a pair, circumferentially diametrically, namely symmetrical, thus working head is output axle 4 driven rotary uniform force, can certainly be two to or three to etc., wherein often pair be both diametrically, radial protrusion 42 can with one of them face of the working head 9 of six sides against and limit working head 9 and rotate relative to output shaft 4.
The above-described radial protrusion 42 for output shaft 4 and working head 6 contact zones move the mode that working head 9 rotates, and such working head 9 uniform force, unit are is stressed little.Certainly, radial protrusion 42 and working head 9 linear contact lay of output shaft 4 also can drive working head 9 to rotate, as: the angle not limiting radial protrusion 42, as long as it can drive working head 9 to rotate, press part 465 is arranged at the position axially corresponding with the extension of radial protrusion 42, so also can realize working head 9 and enter output shaft 4 smoothly.Here press part refers to steel ball, steel column etc., and steel ball can arrange two, as long as one of them is axially corresponding to radial protrusion 42, therefore symmetry or mal-distribution can realize working head enter output shaft 4 smoothly.
In above embodiment, no matter torque transfer part is hexagon or 12 jiaos of stars, and six side's external forms of working head 9 and the torque transfer part of output shaft 4 need completely corresponding, if slightly deviation also can cause working head 9 can not enter output shaft 4 smoothly.In order to address this problem, Figure 14 to Figure 19 gives the third embodiment of the present invention, torque transfer part only gets odd number in 12 radial protrusions or even number, such torque transfer part has six radial protrusions, arc transition is passed through between every two radial protrusions 42, press part 465 is arranged at and one of them radial protrusion position of aliging, extension vertically, with reference to Figure 17, when six side's external forms of working head 9 and torque transfer part stagger, working head 9 is stopped by press part 465, working head 9 continues to push ahead, press part 465 forces the elastic deformation of C type shell fragment 464, simultaneously, C type shell fragment 464 elastic reaction is in press part 465, make that working head 9 is relative with output shaft 4 to be rotated, with reference to Figure 18, until a face of such working head 9 six side external form and one of them radial protrusion are fitted, with reference to Figure 19, working head 9 just can enter the torque transfer part of output shaft smoothly, in fact, the angle that working head 9 and output shaft 4 need relative rotation one very little, and arrange arc transition can give working head 9 leave enough spaces with the relative rotation of output shaft 4.Simultaneously, as long as the rib portion of working head 9 six side external form correspond to the torque transfer part that circular arc portion directly can enter output shaft, that is the angle K that circular arc portion is corresponding is the nothing interference angular range that working head 9 enters output shaft, in present embodiment, K is 30 degree, such six circular arcs are exactly 180 degree, that is there is general probability directly to enter without the need to correction when working head enters the torque transfer part of output shaft, so just can increase the service life of elasticity pressing device.
Figure 20 to Figure 21 is the 4th kind of embodiment of the present invention, elasticity pressing device comprises the radial direction through hole 463a that the position that is located at correction unit 462 on output shaft 4 is communicated with accepting hole 41, one ring like steel wire 466 with opening is set in the position of radial direction through hole 463a on output shaft 4, ring like steel wire 466 is provided with protuberance 465a, protuberance 465a is contained in radial direction through hole 463a and part extend in correction unit 462, in present embodiment, preferred radial direction through hole 463a is mounting hole, its length direction extends along the circumference of output shaft, the length of output shaft 4 can be reduced like this, thus make structure compacter, circle can certainly be set to as required, square etc.When working head 9 enters correction unit 462, if a face in six side's outer peripheral faces of working head 9 is corresponding with protuberance 465a circumference, so working head 9 can directly enter torque transfer part 461; And if a face in six side's outer peripheral faces of working head 9 and protuberance 465a circumference stagger, so working head 9 rotates relative to output shaft 4 and six side's external forms of working head 9 and torque transfer part 461 is matched thus working head 9 can enter output shaft 4 smoothly under the effect of ring like steel wire 466.
In the above-described embodiment, two ring like steel wire 466 of two radial direction through hole 463a and correspondence are preferably set, and arrange along output shaft 4 axially spaced-apart, like this correcting that working head 9 enters output shaft 4 is further strengthened.In addition, two radial direction through hole 463a circumferences can be staggered, namely the relative phase difference of two radial direction through hole 463a is less than 30 degree, namely between two radial direction through hole 463a, positive and negative 60 degree of the angle at interval is relative phase difference, even if this makes it possible to ensure that a wherein rib of working head 9 six side external form is just to the protuberance of one of them ring like steel wire, and the protuberance of another ring like steel wire just can stagger with other rib of working head six side external form, so just can ensure working head 9 with arbitrarily angled enter correction unit 462 time can both directedly make the profile of working head 9 mate with torque transfer part 461.
Figure 22 is depicted as the 5th kind of embodiment of the present invention, elasticity pressing device comprises the radial direction through hole 463 that the position that is located at correction unit 462 on output shaft 4 is communicated with accepting hole 41, be housed in the shell fragment 467 of press part 465 in radial direction through hole 463 and radial bias voltage press part 465, here shell fragment 467 is along the axially extended springs of output shaft 4, one end of shell fragment 467 is fixed between output shaft 4 and casing 1, the other end is the free end of conflict press part 465, the free end of shell fragment 467 can be set to bending, thus the elastic force of shell fragment 467 pairs of press parts 465 can be increased.In present embodiment, working head 9 enters output shaft 4 by identical with the first embodiment of the principle of correcting, repeats no more here.
Figure 23 is depicted as the 6th kind of embodiment of the present invention, elasticity pressing device comprises radial direction through hole 463 and partial receipt that the position that is located at correction unit 462 on output shaft 4 is communicated with accepting hole 41 at radial direction through hole 463 and the shell fragment 467a extend in correction unit 462, one end of shell fragment 467a is fixed between output shaft 4 and casing 1, the other end is the free end with kink 468, wherein kink 468 extend in correction unit 462, here kink 468 is equivalent to press part, and namely press part and elastic component are wholely set the effect that also can realize correcting working head.
Figure 24 to Figure 28 is the 7th kind of embodiment of the present invention, in present embodiment, output shaft 4 has the accepting hole 41b axially arranged, here accepting hole 41b is circular hole, output shaft 4 is provided with the first accepting groove 483 be communicated with accepting hole 41b, contain part in first accepting groove 483 and extend into the first locking member 484, first locking member 484 in accepting hole 41b and one of them face being circumferentially housed in the working head in accepting hole 41b against to limit the rotation of working head relative to output shaft 4.When working head 9 enters output shaft 4, as long as the wherein one side of six side's profiles of working head 9 is corresponding with the first locking member 484, working head 9 just can enter output shaft 4 smoothly, thus output shaft 4 drives working head to rotate by the first locking member 484.
Achieve by arranging the first accepting groove 483 and the first locking member 484 etc. the rotation that output shaft 4 drives working head 9, even output shaft is directly rotated by gear drive, so just can realize working head and enter output shaft smoothly.Output shaft 4 can be driven to rotate to make connecting axle 51, can arrange on output shaft 4 and the first accepting groove 483 interval the second accepting groove 487 is set, contain part in second accepting groove 487 extend into the second locking member 488, second locking member 488 in accepting hole 41a and extend into the wherein one side of six side's external forms of the connecting axle 51 in accepting hole 41b against to drive output shaft 4 to rotate.As long as namely the wherein one side of six side's external forms of connecting axle 51 is corresponding with the first locking member 484, connecting axle 51 just can enter output shaft 4 smoothly, thus connecting axle 51 drives output shaft 4 to rotate by the second locking member 488.
But, when the side face of six side's profiles of working head 9 and the first locking member 484 stagger, working head 9 enters output shaft 4 will be stopped by the first locking member 484, first locking member 484 can be set to move radially like this, both allowed working head 9 to enter output shaft 4, output shaft 4 also can drive working head 9 to rotate by the first locking member 484 simultaneously.Concrete can arrange locating part 48 between output shaft 4 and fore shell 13, output shaft 4 can move axially relative to locating part 48, first locking member 484 allows or limit radial movement along with the axially-movable limited 48 of output shaft 4, locating part 48 is axially arranged the first engaging portion 481 and the first release portion 482, first locking member 484 can engage with the first release portion 482 when being allowed to radial motion, first locking member 484 engages with the first engaging portion 481 when being limited radial motion, flexible member 489 can be set between output shaft 4 and locating part 48 in addition, output shaft 4 axially-movable compression elastic element 489, after working head 9 enters output shaft 4, output shaft 4 can return back to the position that the first locking member 484 engages with the first engaging portion 481 in the presence of a tensile force, thus output shaft drives working head to rotate by locking member.
Same, stopped by the second locking member 488 when entering output shaft 4 to prevent connecting axle 51, on locating part 48, second release portion 486 and the second engaging portion 485 can be set vertically in the position of corresponding second locking member 488, when connecting axle 51 6 side external form one of them in the face of accurate second locking member 488 time, can not be stopped, can insert output shaft 4 smoothly, connecting axle 51 is blocked in the effect that during rotation, the second locking member 488 can play hexagonal hole, rotates together.When the second locking member 488 is aimed in the rib portion of connecting axle 51 6 side external form, be subject to the stop of the second locking member 488, connecting axle 51 can overcome elastic force with the second locking member 488 and output shaft 4 and travel forward, to the second release portion 486 place of locating part 48, second locking member 488 radial motion is engaged with the second release portion 486, connecting axle 51 enters output shaft 4 smoothly, after start, connecting axle 51 rotate to its straight flange and the second locking member 488 to time corresponding under the effect of elastic force, output shaft 4 drives the second locking member 488 to return back to the position of engaging with the second engaging portion 485.
The concrete course of work is as follows, when working head 9 six side external form face aligning the first locking member 484 directly time, can not be stopped, output shaft 4 can be inserted smoothly, if the wherein one side of six side's external forms of connecting axle 51 also aims at the second locking member 488, connecting axle 51 also can insert output shaft 4 smoothly, and during rotation, connecting axle 51 drives output shaft 4 to rotate by the second locking member 488, and output shaft 4 drives working head 9 to rotate together by the first locking member 484.If the wherein one side of six side's external forms of connecting axle 51 staggers with the second locking member 488, connecting axle 51 can overcome elastic force with the second locking member 488 and output shaft 4 and travel forward, until the second locking member 488 is thrown off with the second engaging portion 485 of locating part 48, second locking member 488 radial motion is engaged with the second release portion 486, connecting axle 51 enters output shaft 4 smoothly, after start, connecting axle 51 is driven to rotate, locating part 48 compresses the second locking member 488 in the presence of a tensile force, second locking member 488 radial motion and the second release portion 486 are thrown off, output shaft 4 drives the second locking member 488 axially-movable together in the presence of a tensile force, thus the second locking member 488 returns back to the position of engaging with the second engaging portion 485, connecting axle 51 just drives output shaft 4 to rotate by the second locking member 488.
When working head 9 six side external form face directly stagger with the first locking member 484 time, be subject to the stop of the first locking member 484, working head 9 can overcome elastic force with the first locking member 484 and output shaft 4 and travel forward, until the first locking member 484 is thrown off with the first engaging portion 481 of locating part 48, first locking member 484 radial motion is engaged with the first release portion 482, working head 9 enters output shaft 4 smoothly, now, second locking member 488 and the second engaging portion 485 are thrown off, whether one of them of no matter six side's external forms of connecting axle 51 is faced directly and is alignd with the second locking member 488, connecting axle 51 can enter output shaft smoothly, after start, connecting axle 51 is driven to rotate, working head 9 also can rotate a very little angle under the effect of connecting axle 51 magnet 511, locating part 48 compresses the first locking member 484 and the second locking member 488 in the presence of a tensile force, along with the rotation of working head 9 and connecting axle 51, output shaft 4 first locking member 484 and the second locking member 488 return back to the position of engaging with the first engaging portion 481 and the second engaging portion 485, so, connecting axle 51 just drives output shaft 4 to rotate by the second locking member 488, output shaft 4 also drives working head 9 to rotate together by the first locking member 484.
The above-mentioned definition to each element is not limited in the various concrete structure or shape mentioned in embodiment, and those of ordinary skill in the art can replace it with knowing simply.As motor can carry out alternative motor with gasoline engine or diesel engine etc.; Working head can be cross section is arbitrary regular polygon; In addition, in above-mentioned embodiment, moving to axial between connecting axle and working head store and press from both sides also can be that connecting axle is fixed, and working head storage folder can either also can rotate in axially-movable, and connecting axle also can be coaxially arrange etc. with motor shaft.In addition, elasticity pressing device is mainly used in the relative position of correcting working head and torque transfer part, has no special requirements to its structure, and visual different interior carrys out corresponding change configuration, can increase new element, also can reduce unnecessary element.
Claims (12)
1. a power tool, comprising:
Casing;
Motor, is arranged in casing, and outputting rotary power;
Output shaft, have the accepting hole of the accommodation working head axially arranged, it is polygonal moment of torsion forced section that described working head has cross section;
Transmission mechanism, is arranged between motor and output shaft and also the rotary power that motor exports can be passed to output shaft;
Working head supporting mechanism, is arranged in casing, and described working head supporting mechanism has several receiving spaces be set up in parallel for support works head;
Connecting axle, is arranged in casing and also working head can be made to be in the operating position being positioned at accepting hole or the collecting position being positioned at working head supporting mechanism;
It is characterized in that: described accepting hole comprises torque transfer part and correction unit, described torque transfer part can limit working head and rotate relative to output shaft, described output shaft is provided with elasticity pressing device, described elasticity pressing device stretches in described correction unit at least partly, when working head enters torque transfer part by correction unit, described working head can rotate relative to output shaft by the effect of elasticity pressing device.
2. power tool as claimed in claim 1, is characterized in that: described torque transfer part comprises at least one radial protrusion, at least one radial protrusion described and described moment of torsion forced section against and limit working head and rotate relative to output shaft.
3. power tool as claimed in claim 1 or 2, it is characterized in that: described torque transfer part comprises 12 radial protrusions evenly arranged, described 12 radial convexes contact with described moment of torsion forced section and limit working head and rotate relative to output shaft, and the junction surface extension line vertically that described elasticity pressing device stretches into the part of the described correction unit radial protrusion adjacent with two in described 12 radial protrusions aligns.
4. power tool as claimed in claim 1 or 2, it is characterized in that: described torque transfer part comprises six radial protrusions, described six radial protrusions are six angles of 12 jiaos of stars even setting diametrically wherein, and the part that described elasticity pressing device stretches into described correction unit is alignd with the extension line vertically of in described six radial protrusions.
5. power tool as claimed in claim 4, is characterized in that: pass through arc transition between every two radial protrusions of described six radial protrusions.
6. power tool as claimed in claim 1, is characterized in that: described elasticity pressing device comprises part and stretches into press part in described correction unit and flexible member, and described flexible member is along output shaft radially-inwardly press part described in bias voltage.
7. power tool as claimed in claim 6, is characterized in that: described flexible member is the shell fragment axially arranged along output shaft, and one end of described shell fragment is fixed relative to casing, press part described in the other end bias voltage of described shell fragment.
8. power tool as claimed in claim 1, it is characterized in that: described elasticity pressing device comprises flexible member, described flexible member has the pressure section stretched in described correction unit, and described pressure section can be between free state and bias state along output shaft radial motion at described flexible member.
9. power tool as claimed in claim 8, it is characterized in that: described flexible member comprises at least one and is positioned at the C-type steel silk arranged around described output shaft, described pressure section is arranged at the both sides of described C-type steel silk opening.
10. power tool as claimed in claim 9, is characterized in that: described C-type steel silk arranges two, distributes along output shaft axially spaced-apart.
11. power tools as claimed in claim 10, is characterized in that: two pressure sections of described two C-type steel silks circumferentially stagger setting.
12. power tools as claimed in claim 8, is characterized in that: described flexible member is the shell fragment axially arranged along output shaft, and one end of described shell fragment is fixed relative to casing, and described pressure section is arranged at the other end of described shell fragment.
Priority Applications (8)
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|---|---|---|---|
| CN201210166388.3A CN102909710B (en) | 2011-08-06 | 2012-05-25 | Power tool |
| PCT/CN2012/079689 WO2013020485A1 (en) | 2011-08-06 | 2012-08-03 | Power tool and operating method therefor |
| EP17154867.0A EP3184260B1 (en) | 2011-08-06 | 2012-08-03 | Power tool |
| KR1020147006160A KR20140054207A (en) | 2011-08-06 | 2012-08-03 | Power tool and operating method therefor |
| EP12822060.5A EP2740571B1 (en) | 2011-08-06 | 2012-08-03 | Power tool and operating method therefor |
| EP16158316.6A EP3042740B1 (en) | 2011-08-06 | 2012-08-03 | Power tool and operation method for the power tool |
| US13/628,580 US9421681B2 (en) | 2011-08-06 | 2012-09-27 | Power tool and operation method for the power tool |
| US15/211,825 US10391624B2 (en) | 2011-08-06 | 2016-07-15 | Power tool |
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| CN201210166388.3A CN102909710B (en) | 2011-08-06 | 2012-05-25 | Power tool |
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| CN201210166387.9A Active CN102909709B (en) | 2011-08-06 | 2012-05-25 | Power tool |
| CN2012202905781U Expired - Fee Related CN202702199U (en) | 2011-08-06 | 2012-06-20 | Power tool |
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| CN201210259921.0A Active CN102909678B (en) | 2011-08-06 | 2012-07-20 | Power tool |
| CN201510185839.1A Active CN104801744B (en) | 2011-08-06 | 2012-07-20 | Power tool and the operating method for the power tool |
| CN201410493616.7A Active CN104385205B (en) | 2011-08-06 | 2012-07-20 | Power tool and for the method for operating of this power tool |
| CN201210252591.2A Active CN102909677B (en) | 2011-08-06 | 2012-07-20 | Power tool |
| CN201210259922.5A Active CN102909679B (en) | 2011-08-06 | 2012-07-20 | Power tool and operation method for power tool |
| CN201410494279.3A Active CN104476472B (en) | 2011-08-06 | 2012-07-20 | Power tool and the method for operating for this power tool |
| CN201410494661.4A Active CN104385206B (en) | 2011-08-06 | 2012-07-20 | Power tool and the method for operating for this power tool |
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| CN201220290564XU Expired - Fee Related CN202702198U (en) | 2011-08-06 | 2012-06-20 | Power tool |
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| CN201510185839.1A Active CN104801744B (en) | 2011-08-06 | 2012-07-20 | Power tool and the operating method for the power tool |
| CN201410493616.7A Active CN104385205B (en) | 2011-08-06 | 2012-07-20 | Power tool and for the method for operating of this power tool |
| CN201210252591.2A Active CN102909677B (en) | 2011-08-06 | 2012-07-20 | Power tool |
| CN201210259922.5A Active CN102909679B (en) | 2011-08-06 | 2012-07-20 | Power tool and operation method for power tool |
| CN201410494279.3A Active CN104476472B (en) | 2011-08-06 | 2012-07-20 | Power tool and the method for operating for this power tool |
| CN201410494661.4A Active CN104385206B (en) | 2011-08-06 | 2012-07-20 | Power tool and the method for operating for this power tool |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN202702201U (en) | 2013-01-30 |
| CN104385205A (en) | 2015-03-04 |
| CN102909702B (en) | 2015-08-19 |
| CN102909701A (en) | 2013-02-06 |
| CN104476472A (en) | 2015-04-01 |
| CN202702198U (en) | 2013-01-30 |
| CN202702199U (en) | 2013-01-30 |
| CN102909678A (en) | 2013-02-06 |
| CN102909703A (en) | 2013-02-06 |
| CN102909679B (en) | 2015-04-22 |
| CN102909678B (en) | 2015-04-22 |
| CN104385206B (en) | 2016-02-17 |
| CN104385205B (en) | 2016-05-18 |
| CN102909701B (en) | 2015-12-30 |
| CN104385206A (en) | 2015-03-04 |
| CN102909710A (en) | 2013-02-06 |
| CN102909702A (en) | 2013-02-06 |
| CN104801744A (en) | 2015-07-29 |
| CN104476472B (en) | 2016-08-24 |
| CN102909703B (en) | 2016-05-18 |
| CN102909677B (en) | 2016-03-30 |
| CN102909679A (en) | 2013-02-06 |
| CN102909677A (en) | 2013-02-06 |
| CN202702200U (en) | 2013-01-30 |
| CN102909676A (en) | 2013-02-06 |
| CN102909676B (en) | 2015-04-22 |
| CN104801744B (en) | 2017-06-16 |
| CN102909709B (en) | 2015-02-04 |
| CN102909709A (en) | 2013-02-06 |
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