CN104802140A - Power tool and push-pull rod device thereof - Google Patents

Abstract

The invention discloses a power tool and a push-pull rod device thereof. The power tool comprises a prime motor, a transmission mechanism, an accessory warehouse, and the push-pull rod device. The push-pull rod device comprises a main housing, a driven rod, a locking pin which locks the driven rod in a locking device of the main housing or unlocks the driven rod from the locking position of the main housing by changing its own position, and a driving rod which can change the position of the locking pin and can push or pull the driven rod to move associatively upon unlocking the driven rod. Both the driving rod and the driven rod are slidingly connected with the main housing in the same sliding directions. The accessory warehouse is drivingly connected with the main housing. The power tool and the push-pull rod device thereof have the advantages that the accessory warehouse which can rotate relative to the main housing is used in the power tool, thereby allowing tool accessories stored therein to be installed in the transmission mechanism as need for achieving functions of the tool, and achieving the purpose of unlocking and retreating the driven rod only by pulling the driving rod without additional unlocking actions upon changing the tool accessories; therefore, the operation is simple and convenient.

Description

Power tool and pull bar device thereof

Technical field

The present invention relates to a kind of power tool and servicing unit thereof, be specifically related to a kind of power tool and the pull bar device thereof with accessory warehouse.

Background technology

In the use procedure of power tool, the tool fitting driven is different, the function that power tool can perform or can for object be all different, so in the process using power tool, user may need to change tool fitting frequently to finish the work, present power tool does not generally possess the servicing unit storing and change tool fitting, and it is often not fully up to expectations on the device changing attachment to have the power tool storing and change attachment, often exist in the mechanism performing replacing: the contradiction of the convenience of the reliability under non-replaceable state and replacing action.

Summary of the invention

For solving the deficiencies in the prior art, the object of the present invention is to provide a kind of power tool and the pull bar device thereof that have reliability and convenience concurrently.

In order to realize above-mentioned target, the present invention adopts following technical scheme:

A kind of pull bar device, comprising: main casing, follower lever, to change follower lever from the latched position locking of main casing or the stop pin unlocked by self-position, can change stop pin position and pull or promote the driving lever of follower lever associated movement when follower lever unlocks; Driving lever and follower lever all form identical being slidably connected of glide direction with main casing.

Further, main casing is provided with a rail groove, rail groove comprises: the first track intersected and the second track, driving lever is provided with an energy and oppresses stop pin when driving lever moves to the direction of drawing relative to follower lever along the first orbital motion and then enter the compressing structure of the second track and can promote the pushing structure of follower lever when driving lever moves to the direction pushed away relative to follower lever, follower lever is provided with the limit pin hole that can limit stop pin movement locus and stop pin can be made away from the biased element of the second track and the resistance selection structure that coordinates with pushing structure, stop pin at least one end is embedded in rail groove through limit pin hole, driving lever and follower lever form and are parallel to the first straight line and the relative sliding with preset strokes is connected, and the direction that is slidably connected of they and main case is also all parallel to the first straight line, the bearing pin of stop pin is perpendicular to the first straight line, and the first track overlaps with limit pin hole at least partly, and the second track is parallel to the first straight line at least partly.

Further, the first track is all vertical with the first straight line with the second track.

Further, oppress structure to comprise: a compressing inclined-plane tilting crossing with the first straight line.

Further, the first track and the second track form " L " character form structure, and the first track forms the minor face of " L " font, and the second track forms the long limit of " L " font.

Further, biased element is torque spring spring.

A kind of power tool, comprising: prime mover, transmission mechanism, this power tool also comprises: the pull bar device introduced as front and can by follower lever by wherein the tool fitting that the stores accessory warehouse that ejects or regain; Section transmission mechanism and prime mover are arranged on the inside of main casing, and accessory warehouse and main casing form and to be rotationally connected and a part exposes main casing, and accessory warehouse can with the first pivotal axis for the relative main casing pivotable of axle; First pivoting axis parallel is in the first straight line.

Further, power tool also comprises: form with main casing the handle housing be slidably connected being parallel to the first straight line; Driving lever is fixedly connected with handle housing; Driving lever, follower lever are all positioned at the inner side of main casing or handle housing.

Further, transmission mechanism comprises: by prime mover Direct driver gear-box, can tool fitting in installation fitting warehouse its front end transmission component being axle pivotable with the second pivotal axis can be made, be arranged on the power transmission shaft that the chien shih of gear-box and front end transmission component is formed transmission between them; The axis of the second pivotal axis and power transmission shaft is all parallel to the first straight line; Main casing comprises: can hold the housing case of prime mover and gear-box, can install the front end shell of front end transmission component, be arranged between housing case and front end shell and they are connected as a whole connection housing.

Further, accessory warehouse is provided with a passing hole and multiple unit storehouse that can hold individual tool accessory, unit storehouse is evenly distributed in the circumference of the first pivot axis, in the outside of power transmission shaft, gear-box is fixedly connected with one can through the installing sleeve of passing hole, and power transmission shaft passes from installing sleeve inside.

Further, installing sleeve is provided with circumferential gear assembly, and the inner side of accessory warehouse passing hole is provided with the circumferential shift structure coordinated with circumferential gear assembly.

Usefulness of the present invention is: in power tool of the present invention, adopt the accessory warehouse that can be pivoted relative to each other with main case, enable tool fitting stored therein as required in device to transmission mechanism with implementation tool function, in pull bar device in the present invention simultaneously, driving lever pulls stroke by first paragraph, and by changing that the position of stop pin realizes the unblock of follower lever and main casing, to pull in stroke at second segment be that stretchy follower lever is synchronized with the movement with it, when resetting, the process that promotion driving lever promotes again makes follower lever reset and makes stop pin lock follower lever and main casing, so when driving lever is surprisingly pulled but is not enough to realize unlocking lock pin and be subject to making it return the external force in accessory warehouse in tool fitting, follower lever all can be in the position of withstanding tool fitting reliably, and when tool fitting changed by needs, only pull driving lever can realize unlocking and exiting the object of follower lever without the need to unnecessary unlocking motion, easy and simple to handle, the use sense improving user is subject to.

Accompanying drawing explanation

Fig. 1 is the contour structures schematic diagram of a preferred embodiment of power tool of the present invention;

Fig. 2 is the internal structure schematic diagram of the power tool shown in Fig. 1 under handle housing is in normal condition;

Fig. 3 is the internal structure schematic diagram of the power tool shown in Fig. 1 under handle housing is in the state of pulling open;

Fig. 4 is the perspective view of the power tool inside shown in Fig. 1;

Fig. 5 is the part isometric structural representation of the power tool shown in Fig. 1 behind removing accessory warehouse;

Fig. 6 is the perspective view of part-structure in pull bar device in the power tool shown in Fig. 1;

Fig. 7 is part-structure structural representation in the locked state in pull bar device in the power tool shown in Fig. 1;

Fig. 8 be in the power tool shown in Fig. 1 in pull bar device part-structure will structural representation under released state;

Fig. 9 is the structural representation of a preferred embodiment of the rail groove of main casing;

Figure 10 is the schematic diagram of circumferential gear assembly and circumferential shift structure in the power tool shown in Fig. 1;

Figure 11 is the structural representation of driving lever in pull bar device in the power tool shown in Fig. 1.

Separately, in accompanying drawing, the first straight line overlaps with the first pivotal axis, adopts the label of A/C to represent.

Detailed description of the invention

Below in conjunction with the drawings and specific embodiments, concrete introduction is done to the present invention.

Shown in Fig. 5, power tool 100 of the present invention comprises: prime mover 10, transmission mechanism 20, pull bar device 30, accessory warehouse 40, handle housing 50 etc.

Wherein, prime mover 10 is for being that mechanical movement is with drive transmission device 20 and then implementation tool function by energy conversion.As a kind of preferred version, power tool 100 shown in Fig. 1 to Fig. 4 is an electric screwdriver, and prime mover 10 is an electro-motor, as preferred further, power tool 100 also comprises: for prime mover 10 provides the power source 60 of power, and this power source 60 can be a battery.

In order to make to be formed a unified entirety with upper-part according to corresponding position, power tool 100 of the present invention also comprises: main casing 70.Here it should be noted that, when pull bar device 30 is an independent device, main casing 70 is the part forming rail groove 701 in pull bar device 30, when pull bar device 30 of the present invention is a part of in power tool 100, main casing 70 is namely as holding the shell of remaining part in whole power tool 100 also as the part forming rail groove 701 in pull bar device 30, namely power tool 100 and pull bar device 30 have same shell mechanism, conveniently introduce, be all called main casing 70 following.

As shown in Figures 2 to 5, prime mover 10 and power source 60 are contained in main casing 70 completely, in the entirety that pull bar device 30 is arranged at main casing 70 and housing 50 of shaking hands is formed.

Accessory warehouse 40 and main casing 70 form and are rotationally connected, its can relatively main casing 70 with the first pivotal axis A for axle carries out pivotable, contact accessory warehouse 40 to make user thus manual driving accessory warehouse 40 pivotable, main case 70 is provided with a casing breach 702 makes accessory warehouse 40 be exposed main casing 70 in the circumferential direction of the first pivotal axis A.More specifically, accessory warehouse 40 is respectively formed with an axis being parallel in the inner cylinder face 401,402 of the first pivotal axis A at the two ends axially of the first pivotal axis A, corresponding main casing 70 is formed with the external cylindrical surface 703,704 coordinated with it, and they contact cooperation respectively and accessory warehouse 40 and main casing 70 are formed be rotationally connected.

Accessory warehouse 40 is provided with multiple unit storehouse 403 for holding individual tool accessory 80, and unit storehouse 403 is evenly distributed in the circumference of the first pivotal axis A.Position set by pull bar device 30 makes a circumferential position of its corresponding first pivotal axis A, the tool fitting 80 be in the unit storehouse 403 of this circumferential position can be ejected in the corresponding part of transmission mechanism 20 by pull bar device 30, or be retracted in unit storehouse 403 from the corresponding part of transmission mechanism 20 from unit storehouse 403.In order to realize this function, unit storehouse 403 is through on the direction being parallel to the first pivotal axis A, and so, namely pull bar device 30 wherein realizes push-and-pull tool fitting 80 by stretching into.As a kind of preferred version, tool fitting 80 is screwdriver bit or drill bit.

As a kind of preferred version, accessory warehouse 40 can be made by all or part of employing transparent material, enables user observe tool fitting 80 in each unit storehouse 403; Or the diverse location in corresponding different units storehouse 403 can mark different marks.

Transmission mechanism 20 comprises: gear-box 21, power transmission shaft (figure does not show, lower same) and front end transmission component 22.Wherein, gear-box 21 is subject to the Direct driver of prime mover 10, its role is to: adjustment rear drive power transmission shaft is carried out to the power that prime mover 10 exports, power transmission shaft is by power transmission to a part for front end transmission component 22, and another part of front end transmission component 22 is used for the tool fitting 80 that Direct driver has assembled.

Specifically, as a kind of preferred version, front end transmission component 22 comprises: be fixed on the driving gear 221 of power transmission shaft output, the driven gear 222 engaged with driving gear 221, be fixedly connected with and form with main casing 70 drive socket 223 be rotationally connected that second pivotal axis B is axle with driven gear 222; Drive socket 223 is tube-in-tube structure, its inside is provided with the cavity that can hold tool fitting 80, and (figure does not show, lower same), and be provided with in this cavity and can (scheme not show to the circumferential drive mechanism of tool fitting 80 transmitting torque, lower same), driven gear 222 is provided with the centre bore (scheming not show, lower same) communicated with drive socket 223 cavity, and tool fitting 80 can enter into cavity 233a by this centre bore.Second pivotal axis B is parallel to the first pivotal axis A, but they do not overlap.

Operationally, prime mover 10 driving gearbox 21 so make power transmission shaft drive driving gear 221, driving gear 221 drives driven gear 222 by engagement thus makes drive socket 223 pivot in unison with it of fixing with it, pivot axis is the second pivotal axis B, if be equipped with tool fitting 80 in the cavity of now drive socket 223, the circumferential drive mechanism be then made up of the projection of chamber wall in cavity 233a is by (scheming not show with the circumferential structure of tool fitting 80, lower same) coordinate, make tool fitting 80 carry out pivotable with implementation tool function with the second pivotal axis B.As preferably, the circumferential structure of tool fitting 80 is the polyhedral structure that its periphery is formed, and more specifically, this polyhedron is positive six prisms.

With reference to shown in Fig. 2 to Fig. 5, as a kind of preferred version, main casing 70 comprises: housing case 71, front end shell 72, connection housing 73.

Wherein, housing case 71 is the chief component of main casing 70, and it is mainly used in holding prime mover 10, gear-box 21, power source 60 and associated circuit components (figure does not mark) etc., and with regard to its profile, it can form the handle etc. being convenient to grip.Front end shell 72 is mainly used in arranging front end transmission component 22.

In order to make accessory warehouse 40 expose, as previously mentioned, main casing 70 is formed with casing breach 702, and therefore main casing 70 is divided into housing case 71, front end shell 72 two parts by casing breach 702, connects housing 73 and connects as a whole by their two parts.

As a kind of preferred version, connect housing 73 place and be provided with a transparent window 731.User can pass through this transparent window 731, observes accessory warehouse 40.

With reference to shown in Fig. 2 to Fig. 5 and Figure 10, in transmission mechanism 20, gear-box 21 and front end transmission component 22 lay respectively at the both sides in accessory warehouse 40, if so power transmission shaft will form transmission between which, have to pass through accessory warehouse 40.So as a kind of embodiment, accessory warehouse 40 is provided with a passing hole 404, has the centrosymmetric circumferential structure of relative first pivotal axis A with regard to this passing hole 404.So namely power transmission shaft passes accessory warehouse 40 by passing hole 404.

In order to better protect power transmission shaft; make it interference-free, and in order to arrange the mechanism of the circumferential position that can lock accessory warehouse 40 pivotable, as a kind of preferred version; in the outside of power transmission shaft, gear-box 21 is fixedly connected with one can through the installing sleeve 23 of passing hole 404.

Be provided with an axis hole 231 in this installing sleeve 23, power transmission shaft is passed from installing sleeve 23 inside by this axis hole 231.And installing sleeve 23 passes from passing hole 404, so because installing sleeve 23 itself is fixing, so power transmission shaft can rotate stably and not be subject to the impact in accessory warehouse 40 in axis hole 231.

In addition, in order to lock the circumferential position in accessory warehouse 40 with the centre bore making unit storehouse 403 can aim at driven gear 222.As a kind of preferred version, installing sleeve 23 is provided with circumferential gear assembly 231, and the inner side of accessory warehouse 40 passing hole 404 is provided with the circumferential shift structure coordinated with circumferential gear assembly 231.Specifically, with reference to shown in Fig. 5 and Figure 10, the holding tank 232 of two symmetrical openings is laterally provided with at installing sleeve 23, an elastic component 233 and a locking piece 234 is provided with in this holding tank 232, elastic component 233 is by locking piece 234 bias voltage laterally, and the part that locking piece 234 contacts with the circumferential shift structure of passing hole 404 has round and smooth appearance profile.Passing hole 404 circumferential shift structure 404a is equally distributed circular groove 404a in the first pivotal axis A circumference.So, under the effect of elastic component 233, it is partially submerged in circular groove 404a locking piece 234, when accessory warehouse 40 pivotable, locking piece 234 is pushed back in holding tank 232, when the angle turned over makes locking piece 234 again aim at adjacent circular groove 404a, elastic component 233 makes locking piece 234 outwards embed wherein, and whole accessory warehouse 40 is by from a circumferential locking gear level to another circumferential gear.It should be noted is that, why symmetrical two groups of holding tanks 232, elastic component 233 and the locking piece 234 of arranging is effects in order to make counter lock locking member 234 pairs of accessory warehouses 40, makes its external force being unlikely to only to receive side and causes pivotable not smooth.As preferably, locking piece 234 can also can for having the metallic pin of hemisphere end for steel ball; Elastic component 233 can be helical spring.

With reference to shown in Fig. 2 and Fig. 9, in order to realize ejecting and regaining tool fitting 80 in unit storehouse 403.Pull bar device 30 of the present invention also comprises except main casing 70: driving lever 31, follower lever 32, stop pin 33.

The main design concept of pull bar device 30 of the present invention is: follower lever 32 is locked by stop pin 33, it is made relatively not move by main casing 70, driving lever 31 is when pulled, first stop pin 33 position changes by pulling by it, follower lever 32 is unlocked from latched position, along with driving lever 31 is pulled further, the follower lever 32 that its stretchy is unlocked exits unit storehouse 403, thus eliminates spacing to accessory warehouse 40.User complete unit storehouse 403 selection and after changing, promote driving lever 31 and follower lever 32 can be reset to latched position, simultaneously stop pin 33 resets and makes follower lever 32 again be locked in latched position.

Specifically, with reference to shown in Fig. 9, do not mark in main casing 70(Fig. 9) be provided with a rail groove 701, rail groove 701 comprises: the first track 701a intersected and the second track 701b.

With reference to shown in Fig. 2 to Fig. 9, driving lever 31 is provided with energy compressing stop pin 33 when driving lever 31 moves to the direction of drawing (namely shown in figure direction) to the right relative to follower lever 32 and moves along the first track 701a and then enter the compressing structure 311 of the second track 701b and can promote the pushing structure 312 of follower lever 32 when driving lever 31 moves to the direction pushed away (shown in figure direction) left relative to follower lever 32, and follower lever 32 is provided with the limit pin hole 321 that can limit stop pin 33 movement locus and stop pin 33 can be made away from the biased element 322 of the second track 701b and the resistance selection structure 323 that coordinates with pushing structure 312.

Stop pin 33 at least one end is embedded in rail groove 701 through limit pin hole 321; Driving lever 31 and follower lever 32 formation are parallel to the first straight line C and have being slidably connected of preset strokes, the bearing pin of stop pin 33 is perpendicular to the first straight line C, first track 701a overlaps with limit pin hole 321 at least partly, and the second track 701b is parallel to the first straight line C at least partly.

First straight line C is set to the direction parallel with the first pivotal axis A, namely the direction that driving lever 31 and follower lever 32 slide is parallel to through direction, unit storehouse 403, suitable like this follower lever 32 front end geometry is set and size can by unit storehouse 403, the object of tool fitting 80 in ejecting unit storehouse 403 can be realized, furthermore, unit storehouse 403 is returned in order to reclaim tool fitting 80 when drawing, the magnetic part 324 of an energy adsorption tool accessory 80 can be provided with in follower lever 32 front end, follower lever 32 is made to return to unit storehouse 403 in stretchy tool fitting 80 when pulled.It should be noted that, unit storehouse 403 can be exited by the preset strokes arranging follower lever 32 to make tool fitting 80 be unlikely to.

So, in working order, stop pin 33 is arranged in the first track 701a, arranging the first track 701a makes it not parallel with the direction that follower lever 32 slides with driving lever 31, so now stop pin 33 end is embedded in the first track 701a, so the first track 701a is spacing to its formation, stop pin 33 be moved not leaving the direction that the first track 701a can not slide along parallel driving lever 31 and follower lever 32, and biased element 322 makes stop pin 33 away from the second track 701b under the state not having external force, it is made to remain in the first track 701a.Stop pin 33 and then by making follower lever 32 not be moved when being only subject to the external force being parallel to its glide direction with the position-limiting action of limit pin hole 321, namely follower lever 32 is locked in latched position.

When unlocking, pull driving lever 31, because limit pin hole 321 overlaps with the first track 701a, the effect that compressing stop pin 33 is overcome biased element 322 by compression mechanism 311 is moved until the edge i.e. first track 701a of limit pin hole 321 and the second track 701b intersection along the first track 701a, arranging the second track 701b makes it be parallel to the direction of driving lever 31 and follower lever 32 slip, now stop pin 33 is owing to entering into the second track 701b, there is not position-limiting action in the direction that it is being parallel to driving lever 31 and follower lever 32 slip, so now driving lever 31 can pull follower lever 32 to make its relative main casing 70 slide by corresponding structure.

It should be noted that, this process between the second track 701b is urged to stop pin 33 at the beginning of pulling driving lever 31, follower lever 32 does not unlock completely, therefore driving lever 31 must can want relative follower lever 32 relative sliding one segment distance, therefore, between driving lever 31 and follower lever 32, the pattern of wants is parallel to the first straight line C and has being slidably connected of preset strokes.In order to the relative sliding realized between them connects, preferably, with reference to shown in Fig. 7, Fig. 8, Figure 10, driving lever 31 is formed with an open slot 313 near one end of follower lever 32, the direction that it is being parallel to stop pin 33 bearing pin is through, side near follower lever 32 on the direction perpendicular to stop pin 33 bearing pin is bottom land 313a, and opposite side is notch 313b.Corresponding follower lever 32 forms or is provided with one and parallel with stop pin 33 pulls pin 325, this pulls pin 325 to be arranged in open slot 313, because open slot 313 notch 313b is open, so pushing away (left side movement in accompanying drawing, pull then in contrast, down together) during dynamic driving lever 31, driving lever 31 can't promote to move by open slot 313 and pull pin 325, and when pulling driving lever 31, originally the bottom land 313a of open slot 313 not with pull pin 325 to form to coordinate, now driving lever 31 can pull open a segment distance relatively with follower lever 32, in time pulling pin 325 to touch open slot 313 bottom land 313a, driving lever 31 by open slot 313 with pull the cooperation of pin 325 to pull together with follower lever 32 to move.

In addition, as preferably, the compressing structure 311 of driving lever 31 and pushing structure 312 are formed at the homonymy of open slot 313; Wherein, oppress structure 311 to comprise: a compressing inclined-plane 311a tilting crossing with the first straight line C; Pushing structure 312 comprises: a promotion plane 312a intersected vertically with the first straight line C, and corresponding resistance selection structure 323 comprises: a resistance intersected vertically with the first straight line C is bulldozed face 323a.

When pulling driving lever 31, compressing inclined-plane 311a is because tilting crossing with the first straight line C (i.e. driving lever 31 pull direction), so along with the movement of driving lever 31, compressing inclined-plane 311a oppresses stop pin 33 and makes its position that goes out of lock, thus realizes the unblock to follower lever 32.

When promoting driving lever 31, driving lever 31 first moves closer to follower lever 32, compressing inclined-plane 311a also departs from from the relative position of compressing stop pin 33 gradually, wait promote plane 312a and resistance be bulldozed face 323a contact time, driving lever 31 promotes follower lever 32 and moves, although now oppress inclined-plane 311a no longer oppress stop pin 33, but stop pin 33 is still subject to its constraint in the second track 701b, until along with follower lever 32 motion make stop pin 33 get back to the first track 701a and the second track 701b intersection time, it is no longer subject to the constraint of the second track 701b, latched position is got back to away from the second track 701b along the first track 701a under the effect of biased element 322, realize the locking to follower lever 32.

As a kind of preferred version, biased element 322 is a torque spring, more specifically, is a double torsion spring.This double torsion spring comprises two sleeve pipe 322a, these two sleeve pipe 322a are arranged on follower lever 32 respectively, specifically, follower lever 32 both sides are equipped with a locating dowel 326, location is realized above sleeve pipe 322a is sleeved on, two sleeve pipe 322a end and follower lever 32 are fixed respectively, and their other end is connected to become a framework 322b contacted with stop pin 33.

As a kind of preferred version, be convenient to combine to make driving lever 31 and follower lever 32, follower lever 32 forms a groove structure in its end near driving lever 31, and the compressing structure 311 of driving lever 31, pushing structure 312, open slot 313 are arranged in this groove structure.

As a kind of preferred version, with reference to shown in Fig. 9, the first track 701a and the second track 701b forms " L " character form structure, and the first track 701a forms the minor face of " L " font, and the second track 701b forms the long limit of " L " font.Namely the first track 701a is perpendicular to the second track 701b; And the second track 701b is longer than the first track 701a, such benefit is, the first track 701a is perpendicular to the second track 701b, and the second track 701b is by the direction being parallel to follower lever 32 movement, so, the first track 701a retrains follower lever 32 more reliably.

As a kind of preferred version, shown in Fig. 5, in order to make user better operate driving lever 31, handle housing 50 is fixedly connected with it, and the housing 50 of simultaneously shaking hands forms with main casing 70 and is slidably connected.Such benefit is that handle housing 50 can provide larger operations area, and is in the outside convenient operation of main casing 70.

More than show and describe general principle of the present invention, principal character and advantage.The technical staff of the industry should understand, and above-described embodiment does not limit the present invention in any form, the technical scheme that the mode that all employings are equal to replacement or equivalent transformation obtains, and all drops in protection scope of the present invention.

Claims (11)

1. a pull bar device, comprise: main casing, it is characterized in that, described pull bar device also comprises: follower lever, to change described follower lever from the locking of the latched position of described main casing or the stop pin unlocked by self-position, can change described stop pin position and pull or promote the driving lever of described follower lever associated movement when described follower lever unblock; Described driving lever and follower lever all form identical being slidably connected of glide direction with described main casing.

2. pull bar device according to claim 1, it is characterized in that, described main casing is provided with a rail groove, described rail groove comprises: the first track intersected and the second track, described driving lever is provided with an energy and oppresses described stop pin when described driving lever moves to the direction of drawing relative to described follower lever along described first orbital motion and then enter the compressing structure of described second track and can promote the pushing structure of described follower lever when described driving lever moves to the direction pushed away relative to described follower lever, described follower lever is provided with the limit pin hole that can limit described stop pin movement locus and described stop pin can be made away from the biased element of described second track and the resistance selection structure that coordinates with described pushing structure, described stop pin at least one end is embedded in described rail groove through described limit pin hole, described driving lever and follower lever form and are parallel to the first straight line and the relative sliding with preset strokes is connected, and the direction that is slidably connected of they and described main case is also all parallel to the first straight line.

3. pull bar device according to claim 2, is characterized in that, the bearing pin of described stop pin is perpendicular to described first straight line, and described first track overlaps with described limit pin hole at least partly, and described second track is parallel to described first straight line at least partly; Described first track is all vertical with the first straight line with described second track.

4. pull bar device according to claim 3, is characterized in that, described compressing structure comprises: a compressing inclined-plane tilting crossing with described first straight line.

5. pull bar device according to claim 4, is characterized in that, described first track and the second track form " L " character form structure, and described first track forms the minor face of " L " font, and described second track forms the long limit of " L " font.

6. pull bar device according to claim 5, is characterized in that, described biased element is torque spring.

7. a power tool, comprising: prime mover, transmission mechanism, is characterized in that, also comprises: as weigh pull bar device as described in 1 and can by as described in follower lever by wherein the tool fitting that the stores accessory warehouse that ejects or regain; The described transmission mechanism of part and described prime mover are arranged on the inside of described main casing, described accessory warehouse and described main casing form and to be rotationally connected and a part exposes described main casing, and described accessory warehouse can with the first pivotal axis for the relatively described main casing pivotable of axle; Described first pivoting axis parallel is in described first straight line.

8. power tool according to claim 7, is characterized in that, described power tool also comprises: form with described main casing the handle housing be slidably connected being parallel to the first straight line; Described driving lever is fixedly connected with described handle housing; Described driving lever, follower lever are all positioned at the inner side of described main casing or handle housing.

9. power tool according to claim 8, it is characterized in that, described transmission mechanism comprises: by described prime mover Direct driver gear-box, tool fitting in described accessory warehouse can be installed and its front end transmission component being axle pivotable with the second pivotal axis can be made, be arranged on the power transmission shaft that the chien shih of described gear-box and front end transmission component is formed transmission between them; The axis of described second pivotal axis and described power transmission shaft is all parallel to described first straight line; Described main casing comprises: can hold the housing case of described prime mover and gear-box, can install the front end shell of described front end transmission component, be arranged between described housing case and front end shell and they are connected as a whole connection housing.

10. power tool according to claim 9, it is characterized in that, described accessory warehouse is provided with a passing hole and multiple unit storehouse that can hold individual tool accessory, described unit storehouse is evenly distributed in the circumference of described first pivot axis, in the outside of described power transmission shaft, described gear-box is fixedly connected with one can through the installing sleeve of described passing hole, and described power transmission shaft passes from described installing sleeve inside.

11. power tools according to claim 10, is characterized in that, described installing sleeve is provided with circumferential gear assembly, and the inner side of described accessory warehouse passing hole is provided with the circumferential shift structure coordinated with described circumferential gear assembly.