CN105500261A - Power tool and operation method thereof - Google Patents

Abstract

The invention discloses a power tool and an operation method thereof. The power tool comprises a main body, a motor, a handle and a propping bracket and further comprises a link mechanism, wherein the main body is provided with an output shaft for diving a working head to rotate; the motor is used for driving the output shaft to rotate; the handle is movably connected with the main body; and the link mechanism is arranged among the main body, the handle and the propping bracket and enables the main body and the propping bracket to simultaneously move towards or away from each other relative to the handle in the axial direction of the output shaft. According to the power tool provided by the invention, since the main body and the propping bracket move away from each other relative to the handle to reduce the distance for which the propping bracket extends out of the handle, the stability of the propping bracket is enhanced.

Description

Power tool and method of operating thereof

Technical field

The present invention relates to a kind of power tool, particularly relate to a kind of brill class power tool.

The invention still further relates to a kind of method of operating of power tool.

Background technology

In existing brill class hand-hold power tool, generally include electric drill, percussion drill and electric screw driver.Electric drill is for holing on workpiece, and in operation process, auger spindle rotates constantly.

In order to machining hole on workpiece better, support support help support workpiece by needs extra installation on power tool.But the type of annex is many on the market, can not be general on all power tools.In addition, dismounting and the installation of annex are all more loaded down with trivial details, use cause great inconvenience to user.The most important thing is, when needing to bore darker hole, in the boring incipient stage, annex rocks comparatively serious, can not carry out boring work well.

Therefore, a kind of convenience is needed badly and firm power tool.

Summary of the invention

For the deficiencies in the prior art, the object of the present invention is to provide a kind of convenience and firm power tool.

The technical solution adopted for the present invention to solve the technical problems is: a kind of power tool, comprising: main body, comprises the output shaft for driving working head to rotate; Motor, driver output axle rotates; Handle, is connected with subject activity; Support support; Described power tool also comprises the link gear being arranged on main body, handle and supporting between support, and described link gear makes described main body support support with described simultaneously relative described handle is along output shaft axially in opposite directions or counter motion.

Preferably, described link gear comprise setting the first service portion on the body, be arranged on described in the reverse unit that supports the second service portion on support and be arranged on described handle; Described reverse unit can make described first service portion and described second service portion, and simultaneously relative described handle is along output shaft axially in opposite directions or counter motion.

Preferably, described first service portion axially extends along output shaft, and described second service portion axially extends along output shaft; Described first service portion and described second service portion lay respectively at the both sides of described reverse unit relative to output shaft axial direction.

Preferably, described first service portion is the first tooth bar, and described second service portion is the second tooth bar, and described reverse unit comprises the gear that can rotate around fixed axis; Described gear engages with described first tooth bar and described second tooth bar simultaneously; Described first tooth bar and described second tooth bar are positioned at the both sides of described fixed axis.

Preferably, described first service portion is the first tooth bar, and described second service portion is the second tooth bar, and described reverse unit comprises the first gear and the second gear that coaxially arrange around rotation; Described first gear engages with described first tooth bar, and described second gear engages with described second tooth bar; Described first tooth bar and described second tooth bar are positioned at the both sides of rotation

Preferably, described first service portion is axially extended first tank body; Described second service portion is axially extended second tank body; Described reverse unit comprises pressure transmission medium, for storing the storage tank of described pressure transmission medium and being fixed on first piston bar on handle and towards the opposite and the second piston rod; Described first piston bar and the first tank body are tightly connected and form the first cavity; Described second piston rod and the second tank body are tightly connected and form the second cavity; Described storage tank is communicated with the second cavity with the first cavity.

Preferably, described first service portion be fixing on the body and along the axially extended first piston bar of output shaft, described second service portion is for support described in being fixed on support and along axially extended the second piston rod of output shaft, described reverse unit comprises the U-shaped pipe of the rigidity be fixed on handle and is positioned at the pressure transmission medium of described U-shaped pipe; Described U-shaped pipe has along the axially extended first pipe arm of output shaft and the second pipe arm; Described first piston rod seal is connected in described first pipe arm, and described second piston rod packing is connected in described second pipe arm; Described pressure transmission medium is sealed between first piston bar and the second piston rod.

Preferably, described first service portion comprises the first fixed part and the second fixed part that arrange along output shaft axially spaced-apart, and described second service portion comprises the 3rd fixed part and the 4th fixed part that arrange along output shaft axially spaced-apart, and described reverse unit is directive wheel; Described first, the 3rd fixed position is in described directive wheel along output shaft axially towards the side of output shaft, and described second, the 4th fixed position is in the opposite side of directive wheel; Described link gear also comprises the first flexible connecting member and the second flexible connecting member; One end of described first flexible connecting member is fixed on the first fixed part, and walks around the directive wheel other end and be fixed on the 3rd fixed part; One end of described second flexible connecting member is fixed on the second fixed part, and walks around the directive wheel other end and be fixed on the 4th fixed part.

Preferably, described directive wheel can rotate around its axial line.

Preferably, described power tool also comprises the locking system operationally limiting main body or support the axially-movable of support opposite handle.

Preferably, described locking system comprises the first latch fitting be arranged in main body, the second latch fitting be arranged on handle, and the first latch fitting and the second latch fitting can the locking and unlockings mutually.

Preferably, described locking system comprises the first latch fitting be arranged in main body, the second latch fitting be arranged on support, and the first latch fitting and the second latch fitting can the locking and unlockings mutually.

Preferably, described locking system comprises and is arranged on the first latch fitting supported on support, the second latch fitting be arranged on handle, and the first latch fitting and the second latch fitting can the locking and unlockings mutually.

Preferably, described first latch fitting is draw-in groove, and described second latch fitting is latch, and described draw-in groove selectively engages with described latch and is separated.

Preferably, the distance that moves axially of the relatively described handle of described main body supports the moving axially apart from the identical of relatively described handle of support with described.

Preferably, described handle is provided with in main body the contact be electrically connected, and another in described handle and main body is provided with along the axially extended conductance rail of output shaft; In the process that main body opposite handle moves axially, described contact is electrically connected with described conductance rail all the time.

Preferably, support support described in and comprise support arm and support division; Support arm has first end and the second end, and described support division is connected to the first end of described support arm, and the second end of described support arm is connected in handle or main body slidably.

Preferably, described support division has the supporting surface perpendicular to output shaft axis.

Compared with prior art, due to power tool of the present invention main body with support support opposite handle and oppositely to link movement, drilling depth depends on main body and the distance supporting support and be separated, this distance equals distance that main body opposite handle retreats and supports the distance sum that support opposite handle moves forward, namely, when needing the support of the longer distance of output shaft, stretching out the less distance of handle and can realize relatively supporting support.Owing to supporting support, to stretch out the distance of handle less, therefore support support and firmly can support surface at workpiece, not easily produces and rock, strengthen Consumer's Experience in the course of work.

Present invention also offers a kind of method of operating of power tool, described power tool comprises main body, the handle with output shaft and supports support; Described main body supports support with described simultaneously relative described handle is along output shaft axially in opposite directions or counter motion; Described output shaft has the output and second end relative with described output that connect working head; Described first axially refers to the axial direction from described second end to described output; Described method of operating comprises the steps:

S1: move axially along first and support support or along moving axially main body with second of the first axial opposed; Until the distance supported between support and main body reaches predeterminable range;

S2: installment work head is on output shaft;

S3: support surface at workpiece by supporting support.

Present invention also offers the method for operating of the second power tool, described power tool comprises main body, the handle with output shaft and supports support; Described main body supports support with described simultaneously relative described handle is along output shaft axially in opposite directions or counter motion; Described output shaft has the output and second end relative with described output that connect working head; Described first axially refers to the axial direction from described second end to described output; Described method in turn includes the following steps:

S1: installment work head is to output shaft;

S2: move axially along first and support support or along moving axially main body with second of the first axial opposed; Support between support and main body until working head is located axially at output shaft;

S3: support surface at workpiece by supporting support.

Present invention also offers the method for operating of the third kind of power tool, described power tool comprises main body, the handle with output shaft and supports support; Described main body supports support with described simultaneously relative described handle is along output shaft axially in opposite directions or counter motion; Described method of operating in turn includes the following steps:

S1: installment work head is to output shaft;

S2: supported by working head on workpiece, along the direction driving handle towards workpiece; Until described in support support and support surface at workpiece.

Compared with prior art, the method for operating of power tool of the present invention, operation displacement is less, more simply, quick and easy.

Accompanying drawing explanation

Fig. 1 is the stereogram of the electric drill of the embodiment of the present invention one.

Fig. 2 is the perspective exploded view of the electric drill in Fig. 1.

Fig. 3 is the part isometric decomposing schematic representation of another angle of electric drill in Fig. 1.

Fig. 4 be in Fig. 1 along A-A schematic cross-section, now support division is close to main body.

Fig. 5 be in Fig. 4 support division and body portion from view.

Fig. 6 be in Fig. 1 along B-B cross section partial schematic diagram, now the first latch fitting and the second latch fitting are in the lock state.

Fig. 7 is the view that the first latch fitting in Fig. 6 is separated with the second latch fitting.

Fig. 8 a-d is embodiment one electric drill different operating view.

Fig. 9 is the generalized section of the link gear of the electric drill of embodiment two.

Figure 10 is the link gear different conditions schematic diagram of the electric drill of embodiment three.

Figure 11 is the first view of link gear of the electric drill of embodiment four.

Figure 12 is link gear the second view of the electric drill of embodiment four.

Figure 13 is the schematic diagram of the link gear of the electric drill of embodiment five.

Wherein,

1. main body 11. casing 12. motor

13. transmission mechanism 14. output shaft 111. resettlement sections

112. base portion 2. handle 21. coupling parts

22. grip portions 3. support support 31. support division

311. first cambered surface 312. second cambered surface 313. supporting surfaces

32. support arm 4. working head 51. first tooth bars

52. second tooth bar 53. gear 531. gear wheels

532. pinion 54. gear shaft 55. pinion stands

71. first latch fitting 72. second latch fitting 73. drive-connecting shafts

81a. first fixed part 81b. second fixed part 82a. the 3rd fixed part

82b. the 4th fixed part 83a. first flexible connecting member 83b. second flexible connecting member

84. directive wheel 9. workpiece 91a. first cylinder bodies

91b. second cylinder body 92a. first cavity 92b. second cavity

93a. first piston bar 93b. second piston rod 94a. first passage

94b. second channel 95. transferring cylinder 96. pressure transmission medium

97a. the 3rd piston rod 97b. the 4th piston rod 98.U shape is managed

981. first pipe arm 982. second pipe arms

Detailed description of the invention

In order to make technical problem solved by the invention, technical scheme and beneficial effect clearly understand, below in conjunction with embodiment and accompanying drawing, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.

In the preferred embodiment of power tool of the present invention, power tool, for boring class power tool, bores class power tool and is divided into percussion drill, electric drill, electric screw driver; Electric drill also has direct current and dividing of exchanging, and the present invention is preferably specifically described for D.C. electric drill.

With reference to shown in Fig. 1-3, the electric drill of embodiments of the invention one comprise main body 1, the handle 2 be flexibly connected with main body 1 and opposing body 1 movable arrange support support 3.

Wherein, main body 1 comprises the output shaft 14 for driving working head 4 to rotate; Accordingly, electric drill also comprises the motor 12 that driver output axle rotates.

Further, main body 1 also comprises and being connected between motor 12 and output shaft 14 for the rotary power of motor being passed to the transmission mechanism 13 of output shaft.

Further, main body 1 also comprises casing 11, and motor 12, transmission mechanism 13 and part output shaft 14 are contained in casing 11.

Particularly, casing 11 comprises resettlement section 111 and base portion 112.Resettlement section 111 is roughly cylindrical, and motor 12, transmission mechanism 13 and output shaft 14 major part are contained in resettlement section 111, and output shaft 14 extends outside resettlement section 111 along its axial component.Base portion 112 is positioned at the below of resettlement section 111, for support support 3 and handle 2 is connected.For the ease of installing, casing 11 to be closed up by screw (not shown) by two and half housings of left and right and assembles.

For convenience of description, be axially front towards working head direction with output shaft along it below, after being in the other direction; Under being, be upper in the other direction towards handle orientations with main body.

In the present embodiment, motor 12 is specially electro-motor, and electro-motor has the electro-motor axle extended forward from electro-motor housing.

Transmission mechanism 13 comprises the planetary gear reducing mechanism and pinion gear mechanism that are driven by motor 12 before backward, and wherein pinion gear mechanism is connected with output shaft 14 and drives output shaft 14 to rotate.

Electro-motor is fixed in casing 11, and a gear-box to be fixed in casing 11 and to be positioned at the front portion of electro-motor, and gear-box is for accommodating planetary gear reducing mechanism.Pinion gear mechanism comprises can the first gear of being connected of transmitting torque by a gear shaft with planetary gear reducing mechanism 31, the 3rd gear be connected with output shaft 14 and the second gear simultaneously engaged with the first gear and the 3rd gear, so arrange and the rotation of output shaft 14 can be made relative to the rotation axis parallel of electro-motor.Certainly, also the rotation of the rotation of output shaft 14 relative to electro-motor angularly can be arranged if needed.Wherein gear shaft can be wholely set with the first gear, and the rotation of the first gear is passed to the 3rd gear by the second gear, and the two ends of each gear are supported by axle sleeve.The rear axle housing supporting pinion gear mechanism is fixed on gear-box, and front shaft sleeve is fixed on fore shell.

Certainly, also can be arranged to two gears as required, one is connected with planetary gear reducing mechanism, and another is connected with output shaft 14.In addition, transmission mechanism 13 is not limited to above-described form, and transmission mechanism 13 can only include planetary gear reducing mechanism, or only includes pinion gear mechanism, or other rotary motion transmission mechanism, as ratchet mechanism, turbine mechanism etc.Wherein planetary gear reducing mechanism has three grades of deceleration systems, and the extension of electro-motor axle is engaged with planetary gear reducing mechanism, and rotary motion is passed to pinion gear mechanism by planetary gear reducing mechanism, and pinion gear mechanism drives output shaft 14 to rotate.When such electro-motor runs, by planetary gear reducing mechanism, pinion gear mechanism, finally exported by output shaft.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.

Output shaft 14 has the output connecting working head 4, and is positioned at the second end of the output shaft other end.The front end of output and output shaft, the rear end of the second end and output shaft.The front end of output shaft 14 has the accepting hole axially arranged, for installment work 4 in accepting hole.Working head 4 can be various types of drill bit.

Particularly, handle 2 has the coupling part 21 be connected with main body 1 and the grip portions 22 gripped for operator; Grip portions 22 is positioned at the below of coupling part 21.This coupling part 21 is horizontally disposed with, and grip portions 22 and coupling part 21 in obtuse angle K are arranged.The preferred angle K of the present invention, can be pleasant during such gripping handle operation between 100 degree to 130 degree.

Coupling part 21, in semi-surrounding shape, is partly wrapped in the base portion 112 of main body 1 casing 11.

Be provided with press button on the top of grip portions 22, battery is fixed on the rear portion of grip portions, and as preferred embodiment, this battery can be lithium ion battery.It should be noted that, said lithium ion battery deviates from the-general name of the rechargeable battery of insertion reaction based on lithium ion here, and 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, the lithium ion battery of lithium ion battery to be a joint rated voltage be 3.6V (volt).Certainly, battery also can be the battery types well known to those skilled in the art such as NI-G, ni-mh.

Certainly, the setting position of motor, transmission mechanism, battery does not limit to above-mentioned form, and such as motor and transmission mechanism also can be arranged in handle, and such as battery also can be arranged in main body again.

The present invention is not particularly limited supporting support, can be the required annex using various function in the operation of boring or stubborn screw.Such as the support annex of fixation workpiece, for detection of concealed at the detection annex of work piece object internal objects, hold up screw accessories, for control of dust annex collecting the dust produced in process etc. for what help screw class workpiece, the support that supports of the present invention is not limited to above-mentioned annex, can also be other annex.The present invention is described for the support annex of fixation workpiece, and other annex with reference to support annex, can not repeat them here!

Wherein, support support 3 and comprise support arm 32 and support division 31, support arm has first end and the second end; Described support division is connected to the first end of support arm 32, and the second end of support arm 32 is connected on the coupling part 21 of handle 2 slidably.

Positioning work object when support division 31 works for electric drill, is connected on workpiece by support division 31.In the present embodiment, roughly ringwise, middle breach can pass for working head support division 31.

The supporting surface 313 perpendicular to output shaft axis is provided with on front side of support division 31.Supporting surface 313 is roughly in smooth plane, and guarantee adds man-hour and workpiece is accurately fitted.

Further, be also provided with cambered surface or inclined-plane in the side away from main body of support division 31, cambered surface or inclined-plane are symmetrical arranged relative to the annular center of support division, to ensure the workpiece of placement cylindricality that can be stable.Certainly, cambered surface or inclined-plane are not confined to above-below direction, can also be arranged on other direction.Cambered surface and inclined-plane are not confined to the side away from main body of support division yet, can also be arranged on the side of the close main body of support division.

Further, be equipped with cambered surface or inclined-plane in the side away from main body of support division 31 with near the side of main body, be provided with the first cambered surface 311 to the front end of support division in the present embodiment particularly, rear end is provided with the second cambered surface 312.All can support columnar workpiece in both sides like this, more operating mode can be suitable for.

Support arm 32 is roughly in tabular, and Aspect Ratio is between 5:1 to 15:1, and the middle part of support arm 32 can arrange the groove of some hollow outs, to alleviate the weight supporting support, saves material.

The both sides of support arm 32 horizontal direction have slide section, and the correspondence position of the coupling part 21 of handle 2 is provided with chute, and the slide section of support arm 32 is embedded in chute, and can slide in chute.

Certainly, the second end of support arm is connected in main body slidably.Particularly, the base portion of casing is connected to.

Further, in order to the hole making electric drill can get out certain depth, depthkeeping scale can also be provided with in the side of support arm.See reach corresponding scale time, operator's closing switch stop boring, the hole getting out certain depth can be realized.

In the present embodiment, the upper surface middle part of support arm 32 is arcuation to lower recess, can save space better like this.

In the present invention, main body 1 with support support 3 and can axially to move and the direction of motion is contrary along output shaft by opposite handle 2 simultaneously; Namely main body 1 moves axially along output shaft with the while of supporting support 3 opposite handle 2, and just the moving direction of their opposite handle 2 is contrary.Such as, when main body 1 opposite handle 2 does the first axis mobile, support support 3 opposite handle 2 and do the movement with the second axis of the first axial opposed.First is axially the axial direction from the output of output shaft to the second end; Second is axially the axial direction from the second end of output shaft to output, namely with the direction of the first axial opposed.

Due to main body with support support opposite handle and move simultaneously, therefore also namely when main body 1 is static with the opposite handle supported in support 3, then another inevitable also opposite handle is static.When main body 1 opposite handle 2 is axially static, also opposite handle is static to support support, that is main body 1, handle 2 and support support 3 geo-stationary.

Further, electric drill comprises link gear, and link gear can make main body 1 and support support 3 opposite handle in opposite directions along output shaft axially or counter motion simultaneously.Link gear is arranged on main body, handle and supports between support, special instruction, between not confined space position between.

Particularly, main body opposite handle axially move axially distance with support the support opposite handle distance that moves axially in the axial direction can be equal, also linear, such as main body opposite handle displacement axially with support support opposite handle displacement proportional in the axial direction.

Particularly, link gear comprises setting the first service portion on the body 1, is arranged on the second service portion supported on support 3, and is arranged on the reverse unit on handle 2.Reverse unit can make the first service portion and the second service portion opposite handle do counter motion.

Be the first tooth bar 51, second site of action see Fig. 3-5, the first site of action be the second tooth bar 52, reverse unit is the gear 53 that can rotate around fixed axis; First tooth bar 51 and the second tooth bar 52 all axially extend along output shaft, described gear 53 engages with the second tooth bar 52 with the first tooth bar 51 simultaneously, and between the first tooth bar 51 and the second tooth bar 52, namely the first tooth bar 51 and the second tooth bar 52 are positioned at the both sides of the rotating shaft of gear 53.

Particularly, the lower surface supporting support 3 support arm 32 is provided with along the axially extended raised line of output shaft, and the first tooth bar 51 is positioned at the side of raised line.The bottom of the right side half shell of casing 11 is also provided with along the axially extended raised line of output shaft, and the second tooth bar 52 is positioned at the side of this raised line, and towards the opposite towards with the first tooth bar 51 of the second tooth bar 52, also namely the tooth of first, second tooth bar is oppositely arranged.

Particularly, handle 2 sets firmly gear shaft 54, gear 53 to be arranged on gear shaft 54 thus to be connected on handle 2.Gear 53 can rotate around gear shaft 54, but can not move axially along output shaft by opposite handle 2.Gear shaft 54 is roughly positioned at the center of coupling part 22, can keep whole electric drill in the course of the work like this, and center of gravity, generally within above the tiger's jaw of operator's hand, makes center of gravity in the whole course of work more steady.

The side of gear 53 is engaged with the first tooth bar 51, and the opposite side of gear 53 engages with the second tooth bar 52.When gear 53 rotates, because the first tooth bar 51 and the second tooth bar 52 are positioned at the both sides of gear 53, the movement therefore the first tooth bar 51 and the second tooth bar 52 opposed gear 53 oppositely link.That is, when the first tooth bar 51 moves forward, then move after the second tooth bar 52, the first tooth bar 51 drives main body 1 to move forward simultaneously, and the second tooth bar 52 moves after driving and supporting support 3; When moving after the first tooth bar 51, then the second tooth bar 52 moves forward, and moves after the first tooth bar 51 drives main body 1 simultaneously, and the second tooth bar 52 drive supports support 3 and moves forward.

In the link gear course of work of the present embodiment, the axial distance of main body opposite handle movement is equal with the axial distance supporting the movement of support opposite handle.

In order to make electric drill when not needing to support workpiece, such as, when supporting support interferences boring in small space, still can normally work.Electric drill further comprises locking system, and locking system by main body or can support the locking of support opposite handle.

In the implementation of the first locking system, locking system restriction main body opposite handle moves, and namely locking system can by main body and handle locking.When locking system is by main body and handle locking, main body can not move by opposite handle, and under the effect of link gear, supporting support can not move by opposite handle, then main body, support support, handle three geo-stationary, thus three locking.

See Fig. 6-7 and composition graphs 2, locking system is included in the first latch fitting 71 in main body, being arranged on the second latch fitting 72, first latch fitting 71 on handle and the second latch fitting 72 can the locking and unlocking mutually.

Further, the first latch fitting 71 is fixed on the position of casing 11 outer wall in the front end of stop part 61.Second latch fitting 72 is articulated on handle by drive-connecting shaft 73.

Further, the relative position of the first latch fitting 71 and the second latch fitting 72 is set to, and time together with supporting support 3 and abutting against with main body 1, the first latch fitting 71 and the second latch fitting 72 are positioned at axially corresponding position, now the first latch fitting 71 and the second latch fitting 72 can lock, and also can be separated.When the support division supporting support 3 is separated with main body 1, the first latch fitting 71 and the second latch fitting 72 stagger, and namely the first latch fitting 71 and the second latch fitting 72 have certain distance in the axial direction, thus the first latch fitting 71 and the second latch fitting 72 can not lock.

Wherein, the first latch fitting is draw-in groove, and described second latch fitting is latch, draw-in groove and the selectable engagement of latch be separated.

More specifically, the second latch fitting and cam member are wholely set, and three second of cam member side protruding, and two the second pits between the second projection; Accordingly, the first latch fitting 71 have two first protruding, and the first protruding both sides and between three the first pits.Two the second pits of the second latch fitting 72 accommodate two first projections of the first latch fitting 71 simultaneously respectively, and meanwhile, three the second projections of the second latch fitting 72 embed in the first pit of the first latch fitting 71 simultaneously respectively.

When first protruding embedding the second pit, during second protruding embedding the first pit, the first latch fitting 71 and the second latch fitting 72 lock mutually, as shown in Figure 6; When the first projection deviates from the second pit, when the second projection deviates from the first pit, the first latch fitting 71 and the second latch fitting 72 unlock mutually, as shown in Figure 7.

Certainly, the first latch fitting and cam member can also independently be arranged.

Certainly, the concrete structure of the first latch fitting, the second latch fitting does not limit to said structure, also can be that other can realize the structure of mutual the locking and unlocking.

In the implementation of the second locking system, locking system restriction supports support opposite handle and moves, and namely locking system can will support support and handle locking.When locking system will support support and handle locking, main body can not move by opposite handle, and under the effect of link gear, main body can not move by opposite handle, then main body, support support, handle three geo-stationary, thus three locking.

The concrete locking form supporting support and handle can, with reference to the first implementation, also can be other latch-up structure.

In the implementation of the third locking system, locking system restriction supports support opposing body and moves, and namely locking system can will support support and body lock.When locking system will support support and body lock, under the effect of link gear, support support and body lock all can not move by opposite handle, then main body, support support, handle three geo-stationary, thus three's locking.

The concrete locking form supporting support and main body can, with reference to the first implementation, also can be also other latch-up structure.

In the implementation of the 4th kind of locking system, the work of locking system restriction link gear, link gear is locked.Under the state that link gear is locked, first service portion, the second service portion and reverse unit can not produce relative displacement, thus restriction supports the counter motion of support and main body, makes to support support and body lock, then main body, support support, handle three geo-stationary, thus three locking.

Particularly, by locked for link gear be limiting gear rotate.

In the implementation of the 5th kind of locking system, do not rely on link gear, directly by main body, support support, handle three locks mutually.

Particularly, by a pin simultaneously through main body, support support, handle three thus three locked.

According to the difference of actual conditions, can freely select in above-mentioned five kinds of locking system implementations a kind of.The first locking system implementation is adopted in the present embodiment.

Because in the present embodiment, battery is arranged in handle gripping portion, and motor is arranged in the casing of main body, therefore the electric drill of the present embodiment comprises electrical connection mechanism further.

This electrical connection mechanism comprises the parallel conductance rail of two of arranging in body shell, and the bearing of trend of conductance rail is parallel to the axial direction of output shaft; Conductance rail is electrically connected with motor in body interior.

Accordingly, the inwall of the base portion of handle is provided with two contacts; Two contacts contact with two conductance rail one_to_one corresponding respectively; Contact is electrically connected with the both positive and negative polarity of battery at handle inner.

When main body opposite handle moves, conductance rail remains the electrical contact with contact, thus ensures that, in the whole course of work of electric drill, motor and battery keep status of electrically connecting.

Certainly, conductance rail and contact change place are arranged, and be arranged on handle, accordingly, be arranged in main body contact by conductance rail.

The electric connection mode of conductance rail and contact, can make electrical connection more firm, and not affect overall structure and the outward appearance of electric drill.

Certainly, as long as the electrical connection of motor and battery can be remained in the course of work of electric drill, the concrete structure of electrical connection mechanism does not limit to said mechanism, such as, can also be the direct connecting motor of electric wire and battery, handle offers the groove of supply lines movement.

What main body supported support relatively moves axially distance, the axial distance determining output shaft and support between support, determines the degree of depth of boring.What support support opposite handle moves axially distance, determines to support the length that support stretches out handle, and then whether impact supports the stability of support, namely produce and rock.

For the ease of statement, what main body is supported relatively support moves axially distance, is denoted as D1 ', D1; Move axially distance by what support support opposite handle, be denoted as D2 ', D2; Main body opposite handle moved axially distance, is denoted as D3.

In the prior art, because main body is relative with handle motionless, main body relatively support support move axially that distance equals that handle supports support relatively move axially distance, i.e. D1 '=D2 '.And in the present invention, due to support support and main body simultaneously opposite handle do in opposite directions or counter motion, the displacement that the displacement that therefore main body supports support relatively equals to support support opposite handle adds the displacement of main body opposite handle; I.e. D1=D2+D3.Visible, the displacement supporting support opposite handle in the present invention is less than the displacement that main body supports support relatively, i.e. D2<D1.

Under same drilling depth, be also equivalent to D1 '=D1, can D2<D2 ' be drawn, that is of the present invention support support opposite handle move axially distance be less than in prior art support support opposite handle move axially distance.Such hinge structure, supports the distance that support stretches out outside handle less, and then supports support and rock less, more firmly.

The invention also discloses a kind of method of operating of power tool provided by the present invention.

A method of operating for power tool, described power tool comprises main body, the handle with output shaft and supports support; Described main body supports support with described simultaneously relative described handle is along output shaft axially in opposite directions or counter motion; Described output shaft has the output connecting working head and the second end being positioned at the output other end; Described first axially refers to the axial direction from the second end to output; Described second axial and the first axial opposed;

Described method comprises the steps:

S1: support opposite handle will be supported and move axially along first or main body opposite handle is moved axially along second; Until the distance supported between support and main body reaches default ultimate range;

S2: installment work head is on output shaft;

S3: support surface at workpiece by supporting support.

Wherein, the distance supported between support and main body reaches default ultimate range and refers to, supports support and main body in the axial direction can not be further away from each other.

Below for the electric drill of the embodiment of the present invention one, the method for operating of the first of electric drill of the present invention and method of operating are elaborated.

When not needing to support workpiece, now support the front end of support 3 near main body 1, support arm 32 is almost housed in main body 1 completely.First latch fitting and the second latch fitting lock mutually, and electric drill is in complete machine lock-out state, namely support support 3, main body 1 and handle 2 three locking.Press electric drill switch, namely can carry out drilling operation.

See 8a-c, when needs support Workpiece boring, operate in accordance with the following steps:

The first step, complete machine unlocks

Being pulled downwards by second latch fitting 72 makes the second latch fitting 72 be separated with the first latch fitting 71, and the restriction cancellation between main body 1 and handle 2, main body 1 can move by opposite handle 2, and electric drill is in complete machine released state.As shown in Figure 8 a.

Second step, supports support and supports workpiece

When electric drill is in complete machine released state, now support support 3 and main body 1 can do reverse movement by opposite handle 2.And now non-installment work head on output shaft; To support support 3 to draw forward, and make to support support 3 and move forward, main body 1 moves backward simultaneously.Or, now main body 1 is pulled back, moves after making main body 1, support support 3 simultaneously and move forward.Until make main body and support support to reach predeterminable range.

Installment work head, as shown in Figure 8 b,

The supporting surface supporting support 3 is resisted against on the surface of workpiece 9.

3rd step: boring

When abutment face is resisted against workpiece 9 on the surface, press the trigger of electric drill, bit.Gripping handle 2 pushes away forward, and the reaction force of workpiece 9 moves after making to support support 3 opposite handle 2, and main body 1 moves forward simultaneously, and drives drill bit to go deep into workpiece 9 internal drilling.Now, as shown in Figure 8 c, workpiece gets out required hole.

The invention also discloses the second power tool provided by the present invention method of operating.

Power tool a method of operating, described power tool comprises main body, the handle with output shaft and supports support; Described main body supports support with described simultaneously relative described handle is along output shaft axially in opposite directions or counter motion; Described output shaft has the output connecting working head and the second end being positioned at the output other end; Described first axially refers to the axial direction from the second end to output; Described second axial and the first axial opposed;

Described method in turn includes the following steps:

S1: the power tool after installing working head additional is provided;

S2: support opposite handle will be supported and move axially along first or main body opposite handle is moved axially along second; Support between support and main body until working head is located axially at output shaft;

S3: support surface at workpiece by supporting support.

Wherein, installing the power tool after working head additional, can be support the power tool of support near installment work head during main body, can also be support support and body portion with a certain distance from time installment work head power tool.

Wherein, working head is located axially at output shaft and supports between support and main body, and refer to that working head is retracted completely and support in support, working head front end is positioned at and supports after support front end.

Below for the electric drill of the embodiment of the present invention one, the method for operating of the second of electric drill of the present invention is elaborated.

There is provided the electric drill after installing drill bit additional and electric drill is in complete machine released state, will support support 3 and draw forward, and make to support support 3 and move forward, main body 1 moves backward simultaneously.Or, now main body 1 is pulled back, moves after making main body 1, support support 3 simultaneously and move forward.As shown in Figure 8 b, stretch out completely outside drill bit until support support 3, namely drill bit is supporting between support 3 and main body 1, is now resisted against by the supporting surface supporting support 3 on the surface of workpiece 9.

Mode of operation and the first is substantially similar, does not repeat them here!

The invention also discloses the mode of operation of the third power tool provided by the present invention.

A method of operating for power tool, described method in turn includes the following steps:

S1: the power tool after installing working head additional is provided;

S2: supported by working head on workpiece, makes to support support opposite handle towards workpiece movable; Until described in support support and support surface at workpiece.

Below for the embodiment of the present invention one electric drill, the third method of operating of electric drill of the present invention is briefly described.With the method for operating of first two unlike,

There is provided the electric drill after installing drill bit additional and electric drill is in complete machine released state, now working head is supported on workpiece, as shown in figure 8d.Then handle 2 forward.Now opposite handle, main body under the acting in opposition of workpiece to working head after move, support support 3 opposite handle simultaneously and move forward.Because handle moves forward towards workpiece, support support at faster speed near workpiece, until when supporting support and supporting on workpiece, as shown in Figure 8 b.

Method of operating and the first mode of operation similar, do not repeat them here!

The method of operating of power tool of the present invention, user according to the custom of oneself or hobby, can select the method for operating of oneself, more flexibly, improves Consumer's Experience sense.In addition, the method for operating of power tool of the present invention, during operation, institute's displacement is less, more simply, quick and easy.

Fig. 9 is shown is embodiments of the invention two.In embodiment two, basic identical with embodiment one.Embodiment two and unique not being both of embodiment one, the link gear of embodiment one is a gear, and embodiment two is two synchronous gears.

See Fig. 9, the first site of action is similarly the first tooth bar 51, second site of action and is similarly the second tooth bar 52, and reverse unit comprises pinion 531 and gear wheel 532; Coaxial and the synchronous rotary of pinion 531 and gear wheel 532 is arranged; Pinion 531 engages with the first tooth bar 51, and gear wheel 532 engages with the second tooth bar 52; First tooth bar 51 and the second tooth bar 52 all axially extend along output shaft, and are positioned at the both sides of the rotating shaft of pinion, are also the both sides of the rotating shaft of gear wheel.

Particularly, Fig. 9 is the sectional view of the horizontal plane be positioned on pinion, as can be seen from Figure 9: pinion and gear wheel setting up and down, pinion is positioned on gear wheel, pinion and the first tooth bar in a horizontal plane, gear wheel is positioned at the below of the first tooth bar, and therefore gear wheel and the first tooth bar portion interfere mutually.Because the radius of pinion is less than gear wheel, therefore have certain distance between pinion and the second tooth bar, pinion and the second tooth bar also do not produce interference.

Because the radius of large pinion is different, and size gear synchronous rotates; Therefore when large pinion turns over certain angle, the distance that the first tooth bar engaged with pinion moves axially is less than the distance that the second gear of engaging with gear wheel moves axially.If the radius of pinion is R1, the radius of gear wheel is R2; The distance that first tooth bar moves axially, the axial distance of also i.e. main body opposite handle movement is L1, and the distance that the second tooth bar moves axially, the axial distance also namely supporting the movement of support opposite handle is L2, then it meets L1:L2=R1:R2.

The operation principle of the link gear of embodiment two and the course of work and embodiment one similar, do not repeat them here!

The electric drill of embodiment two method of operating and method of operating and embodiment one substantially similar, can refer to the method for embodiment one, only need make the appropriate adjustments, not repeat them here!

Shown in Figure 10 is embodiments of the invention three.In embodiment three, the structure of the parts that label is identical with embodiment one and function and identical in embodiment one, repeat no more herein.It is different that what embodiment three and embodiment one were unique be not both link gear concrete structure.

The link gear of embodiment three comprises the first service portion arranged in main body equally, be arranged on the second service portion of supporting on support and be arranged on handle and the first service portion and the second service portion opposite handle can be made to make heterodromous reverse unit.

See Figure 10, reverse unit is the directive wheel 84 be arranged on handle 2, and walks around the flexible connecting member of directive wheel.Flexible connecting member comprises the first flexible connecting member 83a and the second flexible connecting member 83b, and the first flexible connecting member 83a walks around directive wheel 84 from front end, contacts with the later half wheel face of directive wheel 84; Second flexible connecting member 83b walks around directive wheel 84 from afterwards, contact with the first half wheel face of directive wheel 84.

First service portion is the first fixed cell for fixing flexible connector in the base portion 112 of main body 1, specifically comprises the first fixed part 81a fixing the first flexible connecting member 83a and the second fixed part 81b fixing the second flexible connecting member 83b.

Second service portion is the second fixed cell for fixing flexible connector on the support arm 32 supporting support 3, specifically comprises the 3rd fixed part 82a fixing the first flexible connecting member 83a and the 4th fixed part 82b fixing the second flexible connecting member 83b.

The first end of the first flexible connecting member 83a is fixed on the first fixed part 81a, and walks around directive wheel 84, and the second end is fixed on the 3rd fixed part 82a.

The first end of the second flexible connecting member 83b is connected on the second fixed part 81b, and walks around directive wheel 84, and the second end is fixed on the 4th fixed part 82b.

In order to avoid influencing each other between first, second flexible connecting member 83a, 83b, the first flexible connecting member 83a contacts in different directive wheel cross-section with directive wheel 84 with the second flexible connecting member 83b.Namely the first flexible connecting member 83a and the second flexible connecting member 83b is in directive wheel 84 wheel face differing heights region.

In order to reduce in running, the wearing and tearing between directive wheel 84 and flexible connecting member, directive wheel of the present invention can rotate around its axis.Certain directive wheel also can not rotate.

Wherein, the first flexible connecting member and the second flexible connecting member are rope, but are not limited to rope, such as, can also be chain etc.The length of first, second flexible connecting member is equal, can certainly be unequal.

Elaborate to the course of work of link gear in the embodiment of the present invention three below in conjunction with Figure 10.

Original state is as shown in Figure 10 upper part, support 3 opposite handle 2 will be supported when drawing forward, be positioned at the 3rd fixed part 82a supported on support 3 to move forward, stretch forward second end of the first flexible connecting member 83a simultaneously, first flexible connecting member 83a is under the effect of the second end tensile force, first flexible connecting member 83a to be stretched the first fixed part 81a be positioned in main body 1 backward by its first end, moves after driving main body 1 simultaneously.Final state is as shown in Figure 10 lower part.

In the link gear course of work, the axial distance of main body opposite handle movement is L1, and the axial distance supporting the movement of support opposite handle is L2, and as can be seen from the figure, L1 and L2 is equal.

When support 3 opposite handle 2 will be supported to pusher, move after being positioned at the 4th fixed part 82b supported on support 3, stretch second end of the second flexible connecting member 83b backward simultaneously, second flexible connecting member 83b is under the effect of the second end tensile force, the first end of the second flexible connecting member 83b stretches forward the second fixed part 81b be positioned in main body 1, drives main body 1 to move forward simultaneously.Thus realization supports support 3 and main body 1 opposite handle 2 does counter motion.

The electric drill of embodiment three method of operating and method of operating and embodiment one substantially similar, can refer to the method for embodiment one, only need make the appropriate adjustments, not repeat them here!

Shown in Figure 11 to Figure 12 is embodiments of the invention four.In embodiment four, the structure of the parts that label is identical with embodiment one and function and identical in embodiment one, repeat no more herein.It is different that what embodiment four and embodiment one were unique be not both link gear concrete structure.

The link gear of embodiment four comprises the first service portion arranged in main body 1 equally, be arranged on the second service portion of supporting on support 3 and be arranged on handle and the first service portion and the second service portion opposite handle can be made to make heterodromous reverse unit.

See Figure 11-12, the first service portion for being fixed on axially extended first tank body 91a in main body; Second service portion supports axially extended second tank body 91b on support for being fixed on; Reverse unit comprises first piston bar 93a and the second piston rod 93b, pressure transmission medium and the storage tank (not shown) for storing described pressure transmission medium.First piston bar 93a and the second piston rod 93b is fixed on handle, and towards the opposite.

First piston bar 93a embeds in the first tank body 91a, and is tightly connected with the first tank body 91a and forms the first cavity 92a; Second piston rod 93b embeds in the second tank body 91b, is tightly connected and forms the second cavity 92b with the second tank body 91b; Described storage tank is communicated with the second cavity 92b with the first cavity 92a.

Further, reverse unit also comprises the transfer tank 95 be connected by valve with fluid reservoir.

Transfer tank 95 arranges the first passage 94a that connects transfer tank 95 and the first cavity 92a and the second channel 94b being connected transfer tank 95 and the second cavity 92b is set.

Particularly, storage tank, transfer tank 95, first, second piston rod 93a, 93b and first, second passage 94a, 94b are all fixed on handle 2.

Further, first, second piston rod 93a, 93b has hollow structure respectively.First, second passage 94a, 94b are communicated with first, second cavity 92a, 92b respectively by the hollow structure of first, second piston rod 93a, 93b.

Pressure transmission medium 96 can enter the first cavity 92a from the hollow structure of transfer tank 95 by first passage 94a and first piston bar 93a thus apply pressure to main body 1.

Pressure transmission medium 96 can enter the second cavity 92b from transfer tank 95 by the hollow structure of second channel 94b and the second piston rod 93b thus apply pressure to supporting support 3.

If the cross-sectional area of the first cavity is S1, the cross-sectional area of the second cavity is S2; The distance that first cylinder body opposite handle moves axially, also the axial distance of i.e. main body opposite handle movement is L1, the distance that second cylinder body opposite handle moves axially, the axial distance also namely supporting the movement of support opposite handle is L2, then it meets L1:L2=S2:S1.

The cross section of first, second cavity is arranged to different size, thus regulates main body opposite handle and support support opposite handle moving speed.

In the present embodiment, the cross section of first, second cavity is identical, thus main body opposite handle displacement axially with support support opposite handle displacement in the axial direction can be equal.

Particularly, pressure transmission medium is hydraulic medium.Certainly, tool is not confined to hydraulic medium, such as, can also be air pressure medium.

Elaborate to the course of work of link gear in the embodiment of the present invention four below in conjunction with Figure 11-12.

When pressure transmission medium 96 of annotating from fluid reservoir to transfer tank 95, pressure transmission medium 96 in transfer tank 95 flows to the first cavity 92a and the second cavity 92b, because first, second piston rod 93a, 93b are fixed on handle, in first, second cavity 92a, 92b pressure transmission medium 96 effect under the first tank body 91a, the second tank body 91b move away from first, second piston rod 93a, 93b respectively, thus make main body 1 and support support 3 opposite handle to move.Due to first, second piston rod 93a, 93b towards the opposite, therefore main body 1 and support support 3 opposite handle and do oppositely interlock.

When extracting pressure transmission medium 96 from fluid reservoir to transfer tank 95, pressure transmission medium 96 in first cavity 92a and the second cavity 92b flows to transfer tank 95, negative pressure is produced in the first cavity 92a and the second cavity 92b, because first, second piston rod 93a, 93b are fixed on handle, the first tank body 91a, the second tank body 91b move towards first, second piston rod 93a, 93b respectively.

The electric drill of embodiment four method of operating and method of operating and embodiment one substantially similar, can refer to the method for embodiment one, only need make the appropriate adjustments, not repeat them here!

Shown in Figure 13 is embodiments of the invention five.In embodiment five, the structure of the parts that label is identical with embodiment four and function and identical in embodiment four, repeat no more herein.It is slightly different that what embodiment five and embodiment four were unique be not both link gear concrete structure.

The link gear of embodiment five comprises the first service portion arranged in main body 1 equally, be arranged on the second service portion of supporting on support 3 and be arranged on handle and the first service portion and the second service portion opposite handle can be made to make heterodromous reverse unit.

See Figure 13, the first service portion is that the front end of axially extended 3rd piston rod 97a, the 3rd piston rod 97a is fixing on the body 1; Second service portion is axially extended 4th piston rod 97b, and the front end of the 4th piston rod 97b is fixed on and supports on support 3; Reverse unit comprises the U-shaped pipe 98 be fixed on handle, and is positioned at the pressure transmission medium 96 of U-shaped pipe.I.e. sealing load Transfer Medium 96 between the 3rd piston rod 97a, the 4th piston rod 97b in U-shaped pipe.

U-shaped pipe has axially extended first pipe arm 981 and the second pipe arm 982; The rear end of the 3rd piston rod 97a is positioned at the first pipe arm 981 and is tightly connected with it, and the rear end of the 4th piston rod 97b is positioned at the second pipe arm 982 and is tightly connected with it; Pressure transmission medium 96 is sealed between first piston bar 97a and the second piston rod 97b.

Wherein, U-shaped pipe is rigid pipe, and pressure transmission medium can not be compressed.It is the effect changing force direction that pressure transmission medium plays.

The active force that a piston rod can produce pressure transmission medium by pressure transmission medium, by the transmission of pressure transmission medium inside, passes to another piston rod being positioned at the pressure transmission medium other end.Due to the shape of U-shaped pipe, pressure transmission medium is converted into reciprocal active force and is applied on another piston rod.Get final product realization body and support support and do oppositely interlock.

Below with reference to Figure 13, the course of work of link gear in the embodiment of the present invention five is elaborated.

When pulling back main body 1, main body 1 is moved after driving the 3rd piston rod 97a, 3rd piston rod 97a squeeze pressure Transfer Medium 96, pressure transmission medium 96 flows backward in the first pipe arm 981, because pressure transmission medium 96 is incompressible, by the turning area of U-shaped pipe 98, flow forward in the second pipe arm 982, and pressure being passed to the 4th piston rod 97b, the 4th piston rod 97b drive supports support 3 and moves forward.

Pull forward main body, promote to support support, pull the course of work supporting support all similar to the above forward backward, do not repeat them here!

The electric drill of embodiment five method of operating and method of operating and embodiment one substantially similar, can refer to the method for embodiment one, only need make the appropriate adjustments, not repeat them here!

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 electro-motor with gasoline engine or diesel engine etc.In addition, link gear mainly makes to support support and main body does counter motion, and have no special requirements to its structure, the interior of visual different casing carrys out corresponding change configuration, can increase new element.

Claims (19)

1. a power tool, is characterized in that, it comprises:

Main body, comprises the output shaft for driving working head to rotate;

Motor, driver output axle rotates;

Handle, is connected with subject activity;

Support support;

Described power tool also comprises the link gear being arranged on main body, handle and supporting between support, and described link gear makes described main body support support with described simultaneously relative described handle is along output shaft axially in opposite directions or counter motion.

2. power tool according to claim 1, is characterized in that: described link gear comprises setting the first service portion on the body, be arranged on described in the reverse unit that supports the second service portion on support and be arranged on described handle; Described reverse unit can make described first service portion and described second service portion, and simultaneously relative described handle is along output shaft axially in opposite directions or counter motion.

3. power tool according to claim 2, is characterized in that: described first service portion axially extends along output shaft, and described second service portion axially extends along output shaft; Described first service portion and described second service portion lay respectively at the both sides of described reverse unit relative to output shaft axial direction.

4. power tool according to claim 3, is characterized in that: described first service portion is the first tooth bar, and described second service portion is the second tooth bar, and described reverse unit comprises the gear that can rotate around fixed axis; Described gear engages with described first tooth bar and described second tooth bar simultaneously; Described first tooth bar and described second tooth bar are positioned at the both sides of described fixed axis.

5. power tool according to claim 3, is characterized in that: described first service portion is the first tooth bar, and described second service portion is the second tooth bar, and described reverse unit comprises the first gear and the second gear that coaxially arrange around rotation; Described first gear engages with described first tooth bar, and described second gear engages with described second tooth bar; Described first tooth bar and described second tooth bar are positioned at the both sides of rotation.

6. power tool according to claim 2, is characterized in that: described first service portion is axially extended first tank body; Described second service portion is axially extended second tank body; Described reverse unit comprises pressure transmission medium, for storing the storage tank of described pressure transmission medium and being fixed on first piston bar on handle and towards the opposite and the second piston rod; Described first piston bar and the first tank body are tightly connected and form the first cavity; Described second piston rod and the second tank body are tightly connected and form the second cavity; Described storage tank is communicated with the second cavity with the first cavity.

7. power tool according to claim 2, it is characterized in that: described first service portion be fixing on the body and along the axially extended first piston bar of output shaft, described second service portion is for support described in being fixed on support and along axially extended the second piston rod of output shaft, described reverse unit comprises the U-shaped pipe of the rigidity be fixed on handle and is positioned at the pressure transmission medium of described U-shaped pipe; Described U-shaped pipe has along the axially extended first pipe arm of output shaft and the second pipe arm; Described first piston rod seal is connected in described first pipe arm, and described second piston rod packing is connected in described second pipe arm; Described pressure transmission medium is sealed between first piston bar and the second piston rod.

8. power tool according to claim 2, it is characterized in that: described first service portion comprises the first fixed part and the second fixed part that arrange along output shaft axially spaced-apart, described second service portion comprises the 3rd fixed part and the 4th fixed part that arrange along output shaft axially spaced-apart, and described reverse unit is directive wheel; Described first, the 3rd fixed position is in described directive wheel along output shaft axially towards the side of output shaft, and described second, the 4th fixed position is in the opposite side of directive wheel; Described link gear also comprises the first flexible connecting member and the second flexible connecting member; One end of described first flexible connecting member is fixed on the first fixed part, and walks around the directive wheel other end and be fixed on the 3rd fixed part; One end of described second flexible connecting member is fixed on the second fixed part, and walks around the directive wheel other end and be fixed on the 4th fixed part.

9. power tool according to claim 8, is characterized in that: described directive wheel can rotate around its axial line.

10. power tool according to claim 1, is characterized in that: described power tool also comprises the locking system operationally limiting main body or support the axially-movable of support opposite handle.

11. power tools according to claim 10, is characterized in that: described locking system comprises the first latch fitting be arranged in main body, the second latch fitting be arranged on handle, and the first latch fitting and the second latch fitting can the locking and unlockings mutually.

12. power tools according to claim 11, is characterized in that: described first latch fitting is draw-in groove, and described second latch fitting is latch, and described draw-in groove selectively engages with described latch and is separated.

13. power tools according to claim 1, is characterized in that, the distance that moves axially of the relatively described handle of described main body supports the moving axially apart from the identical of relatively described handle of support with described.

14. power tools according to claim 1, is characterized in that: described handle is provided with in main body the contact be electrically connected, and another in described handle and main body is provided with along the axially extended conductance rail of output shaft; In the process that main body opposite handle moves axially, described contact is electrically connected with described conductance rail all the time.

15. power tools according to claim 1, is characterized in that: described in support support and comprise support arm and support division; Support arm has first end and the second end, and described support division is connected to the first end of described support arm, and the second end of described support arm is connected in handle or main body slidably.

16. power tools according to claim 15, is characterized in that: described support division has the supporting surface perpendicular to output shaft axis.

The method of operating of 17. 1 kinds of power tools, is characterized in that:

Described power tool comprises main body, the handle with output shaft and supports support; Described main body supports support with described simultaneously relative described handle is along output shaft axially in opposite directions or counter motion;

Described output shaft has the output and second end relative with described output that connect working head; Described first axially refers to the axial direction from described second end to described output;

Described method of operating comprises the steps:

S1: move axially along first and support support or along moving axially main body with second of the first axial opposed; Until the distance supported between support and main body reaches predeterminable range;

S2: installment work head is on output shaft;

S3: support surface at workpiece by supporting support.

The method of operating of 18. 1 kinds of power tools, is characterized in that:

Described power tool comprises main body, the handle with output shaft and supports support; Described main body supports support with described simultaneously relative described handle is along output shaft axially in opposite directions or counter motion;

Described output shaft has the output and second end relative with described output that connect working head; Described first axially refers to the axial direction from described second end to described output;

Described method of operating in turn includes the following steps:

S1: installment work head is to output shaft;

S2: move axially along first and support support or along moving axially main body with second of the first axial opposed; Support between support and main body until working head is located axially at output shaft;

S3: support surface at workpiece by supporting support.

The method of operating of 19. 1 kinds of power tools, is characterized in that:

Described power tool comprises main body, the handle with output shaft and supports support; Described main body supports support with described simultaneously relative described handle is along output shaft axially in opposite directions or counter motion;

Described method of operating in turn includes the following steps:

S1: installment work head is to output shaft;

S2: supported by working head on workpiece, along the direction driving handle towards workpiece; Until described in support support and support surface at workpiece.