CN102909700B - Hand-held electric tool and operating method thereof - Google Patents

Abstract

The invention relates to a hand-held electric tool. The hand-held electric tool comprises an enclosure, a motor arranged in the enclosure and used for outputting a rotating power, an output shaft provided with an axially-arranged holding hole for holding a work head, a transmission mechanism arranged between the motor and the output shaft and capable of transmitting the rotating power output by the motor to the output shaft, a work head support mechanism arranged in the enclosure and provided with a plurality of parallel holding spaces used for supporting the work head, and a connection shaft arranged in the enclosure and capable of locating the work head at a work position in the holding hole or locating the work head at a holding position of the work head support mechanism, wherein the work head comprises at least one driver bit and at least one drilling bit. The hand-held electric tool further comprises an operating mechanism used for selectively driving the connection shaft so as to locate the drilling bit at a holding position and locate the driver bit at a work position or locate the driver bit at the holding position and locate the drilling bit at the work position. The invention further relates to an operating method of the hand-held electric tool.

Description

Hand held electric tool and the method for operating for this hand held electric tool

Technical field

The present invention relates to a kind of hand held electric tool and the method for operating for this hand held electric tool, particularly relate to a kind of realize working head storage and quick-replaceable drill gun class hand held electric tool and the method for operating for this drill gun class hand held electric tool.

Background technology

In existing drill gun class hand held electric tool, generally include electric drill, electric drill and percussion drill.

Electric drill is for holing on workpiece, and in operation process, auger spindle rotates constantly.Electric drill be for by screw-driving to a kind of conventional electric tool on workpiece.Usually, user needs when carrying out operation first to hole, then twists the operation of screw.So, need user to prepare two kinds of dissimilar electric tools, also constantly more will bring and carry out operating and bothering very much.

Certainly, operator can prepare two working heads, i.e. screwdriver bit and drill bit, realizes first holing by the working head that grips is different, then twists the operation of screw, the original working head installed be taken off, then load onto the working head of another kind of structure.Under the use occasion needing frequent replacing working head, bring great inconvenience to operator, cause replacing working head on the one hand loaded down with trivial details, easy loss placed everywhere by the working head taken off on the other hand.

US Patent No. 7367757B2 discloses a kind of double-headed electric drill, comprise one and the chuck of screwdriver bit and the chuck of an installation drill bit are installed, two chucks roughly arrange in 90 degree and can rotate around same pivotal point, wherein make screwdriver bit corresponding with main shaft the chuck 90-degree rotation installing screwdriver bit, being then connected with main shaft by this chuck just to realize the function of screwdriver; When needing to change brill function, separate the chuck of installation screwdriver bit reversely rotate 90 degree with main shaft making the chuck of installation drill bit corresponding with main shaft, be connected the chuck of installation drill bit with main shaft the function that just can realize boring.So just need to arrange two chucks, and two syndeton permissible accuracies between chuck and main shaft are high, manufacture difficulty, the overall structure of double-headed electric drill is also more complicated, and volume is large, and cost is high.

Summary of the invention

For the deficiencies in the prior art, the object of the present invention is to provide a kind of structure simple, easy to operate hand held electric tool.

The technical solution adopted for the present invention to solve the technical problems is: a kind of hand held electric tool, comprising: casing; Motor, is arranged in casing, and outputting rotary power; Output shaft, has the accepting hole of the accommodation working head axially arranged; Transmission mechanism, is arranged between motor and output shaft and also the rotary power that motor exports can be passed to output shaft; Working head supporting mechanism, is arranged in casing, and described working head supporting mechanism has several the collecting receiving spaces be set up in parallel for support works head; Connecting axle, is arranged in casing and also working head can be made to be in the operating position being positioned at accepting hole or the collecting position being positioned at working head supporting mechanism; Described working head comprises at least one screwdriver bit and at least one drill bit, described hand held electric tool also comprises operating mechanism, the selectable driving connecting axle of described operating mechanism makes that drill bit is in collecting position and screwdriver bit is in operating position, or makes that screwdriver bit is in collecting position and drill bit is in operating position.

Preferably, the diameter of described accepting hole is between 5 millimeters to 15 millimeters.

Preferably, one end of described connecting axle and described transmission mechanism can the connections of transmitting torque, and the other end of described connecting axle can be connected with described output shaft and driver output axle rotates.

Preferably, described output shaft and described transmission mechanism can the connections of transmitting torque, and described transmission mechanism driver output axle rotates.

Preferably, described collecting position is provided with two, is set up in parallel along the direction perpendicular to output shaft axis.

Preferably, described collecting position is greater than two, is set up in parallel around the axis being parallel to output shaft axis.

Preferably, on described casing, the position of corresponding described working head supporting mechanism is provided with opened portion, and described working head supporting mechanism can remove from described casing through described opened portion.

Preferably, on described casing, the position of corresponding described working head supporting mechanism is provided with opened portion, and described working head supporting mechanism exposes from described opened portion at least partly.

Preferably, described operating mechanism comprises the operating parts that controls described connecting axle axially-movable and in response to the motion of described operating parts and the automatic switching control equipment regulated the position of working head supporting mechanism, described connecting axle axially-movable makes in described screwdriver bit or drill bit one to be in collecting position, described working head supporting mechanism at the move under influence of automatic switching control equipment to another in described screwdriver bit or drill bit and the axially corresponding position of described output shaft.

Preferably, one end of described connecting axle is provided with magnet, and described connecting axle makes working head get back to collecting position by magnet.

Preferably, described connecting axle can be in axially-movable between operating position and collecting position at described working head, and described operating mechanism also comprises the operating parts controlling described connecting axle axially-movable, and described operating parts exposes casing at least partly.

Preferably, described operating parts and described connecting axle are wholely set.

Preferably, be provided with reseting elastic element between described operating parts and casing, described operating parts has the trend controlling described connecting axle and described working head is moved to operating position under the effect of reseting elastic element.

Preferably, be provided with reseting elastic element between described connecting axle and casing, described connecting axle has the trend that described working head is moved to operating position under the effect of reseting elastic element.

Preferably, described hand held electric tool also comprises the stroke amplifying mechanism be connected between operating parts and connecting axle, described operating parts drives stroke amplifying mechanism to drive connecting axle motion, thus the movement travel of described connecting axle is greater than the movement travel of described operating parts.

Preferably, it is characterized in that: the movement travel of described connecting axle is the twice of the movement travel of described operating parts.

Preferably, described stroke amplifying mechanism comprise the first tooth bar be connected on operating parts, be arranged at the second tooth bar on connecting axle and by the Movement transmit of the first tooth bar to the speed increasing gear group of the second tooth bar.

Preferably, described hand held electric tool also comprises the position-limit mechanism be arranged between casing and connecting axle, described connecting axle makes one of them working head be in operating position, described position-limit mechanism restriction connecting axle moves to the direction away from described working head, and the exercisable releasing position-limit mechanism of described operating parts is to the restriction of connecting axle axially-movable.

Preferably, described hand held electric tool also comprises the position-limit mechanism be arranged between casing and connecting axle and the operating knob coordinated with position-limit mechanism, described connecting axle makes one of them working head be in operating position, described position-limit mechanism restriction connecting axle moves to the direction away from described working head, and the exercisable releasing position-limit mechanism of described operating knob is to the restriction of connecting axle axially-movable.

Preferably, at least one screwdriver bit described is identical with the handle shapes of at least one drill bit.

Preferably, the shank cross section of at least one screwdriver bit described or at least one drill bit is polygon.

Preferably, the shank cross section of at least one screwdriver bit described or at least one drill bit is regular hexagon.

Preferably, described output shaft has the rear end and relative front end of closing on working head supporting mechanism, and described working head can exercisablely remove from operating position from described front end.

Preferably, the middle part of described working head supporting mechanism is provided with magnet along being parallel to working head length direction.

Preferably, described operating parts is lid, described operating parts along the axially-movable of described connecting axle to cover or to expose the part of described working head supporting mechanism or working head.

Preferably, described operating mechanism comprises the movement conversion mechanism be connected between operating parts and working head supporting mechanism, and described movement conversion mechanism is used for the rotary motion linear movement of described operating parts being converted to described working head supporting mechanism.

Preferably, described operating mechanism also comprises the controlling organization be arranged between operating parts and working head supporting mechanism, the direction to collecting position along described working head from operating position, described operating parts moves to terminal location thus described controlling organization can drive working head supporting mechanism by described movement conversion mechanism drived control mechanism from initial position.

Preferably, described controlling organization is connected with operating parts, along described working head from collecting position to the direction of operating position, described operating parts controls described connecting axle axially-movable to superimposed at least partly with described collecting position, and described controlling organization moves to initial position from terminal location.

Preferably, described movement conversion mechanism comprises the oscillating deck be connected between described operating parts and controlling organization, and described operating parts Linear-moving swings around the rotation centerline perpendicular to described operating parts moving direction to drive described oscillating deck.

Preferably, described operating parts is provided with cam path, and one end of described oscillating deck is provided with the sliding pin that can move in described cam path, and the other end of described oscillating deck is connected with described controlling organization.

Preferably, described movement conversion mechanism also comprises the first gear of being connected with oscillating deck and the second gear with the first gears meshing, and described second gear is connected with described controlling organization and drives controlling organization to rotate.

Preferably, described first gear and the second gear are sector gear.

Preferably, described working head supporting mechanism is cylindric, the end face of described cylinder is provided with several locating slots corresponding with several collecting positions described, described controlling organization comprises and a ratchet coordinated in several locating slots described, described ratchet can engage with in several locating slots with two positions separated between move.

Preferably, any one circumference along described cylinder in several locating slots described has the first side and the second side, and described first side is rectangular relative to the end face of described cylinder, and described second side is acute angle relative to the end face of described cylinder.

Preferably, any one in several locating slots described is communicated with along the radial direction of described cylinder and the periphery of cylinder.

Preferably, described operating mechanism comprises the movement conversion mechanism be connected between operating parts and working head supporting mechanism, and described movement conversion mechanism is used for the linear movement linear movement of described operating parts being converted to described working head supporting mechanism.

Preferably, described movement conversion mechanism comprises the cam path be arranged on operating parts and the sliding pin that working head supporting mechanism is fixing relatively, and described sliding pin moves along cam path.

Preferably, described cam path has symmetrically arranged hypotenuse and is connected with hypotenuse and is parallel to two straight flanges of output shaft axis.

Preferably, in described cam path, be provided with two parallel with described two straight flanges respectively gussets, the move in tracks that described sliding pin can be formed at described two straight flanges and two gussets.

Preferably, guide plate is provided with in described cam path, described guide plate can rotate around the rotation perpendicular to output shaft axis, and described operating parts motion makes described sliding pin contact with guide plate, and a straight flange is close wherein under the effect of guide plate for described sliding pin.

Preferably, described guide plate is Y type, to stagger setting relative to the axis of symmetry of described hypotenuse in monolateral one end of described Y type.

Preferably, be provided with stop column in described cam path, described stop column can be conflicted with two bifurcateds of described Y type thus limit described guide plate and be rotated.

Preferably, described stop column is provided with magnet, and described guide plate remains on the position contacted with stop column under the effect of magnet.

Preferably, described operating mechanism comprises the operating parts that controls described connecting axle axially-movable and in response to the motion of described operating parts and the automatic switching control equipment regulated the position of working head, described connecting axle axially-movable makes in described screwdriver bit or drill bit one to be in collecting position, and another move under influence at automatic switching control equipment in described screwdriver bit or drill bit is to the position axially corresponding with described output shaft.

Preferably, described screwdriver bit or drill bit can move along the direction perpendicular to described connecting axle axis.

Preferably, described screwdriver bit or drill bit can rotate round the axis being parallel to described connecting axle axis.

Preferably, described working head supporting mechanism can move along the direction perpendicular to described connecting axle axis.

Preferably, described working head supporting mechanism can rotate round the axis being parallel to described connecting axle axis.

A method of operating for hand held electric tool, described hand held electric tool comprises: casing; Motor, is arranged in casing, and outputting rotary power; Output shaft, has the accepting hole of the accommodation working head axially arranged; Transmission mechanism, is arranged between motor and output shaft and also the rotary power that motor exports can be passed to output shaft; Working head supporting mechanism, is arranged in casing, and described working head supporting mechanism has several the collecting receiving spaces be set up in parallel for support works head; Connecting axle, is arranged in casing and also working head can be made to be in the operating position being positioned at accepting hole or the collecting position being positioned at working head supporting mechanism; Described working head comprises at least one screwdriver bit and at least one drill bit, described hand held electric tool also comprises operating mechanism, the selectable driving connecting axle of described operating mechanism makes that drill bit is in collecting position and screwdriver bit is in operating position, or make that screwdriver bit is in collecting position and drill bit is in operating position, described method of operating comprises the following steps: 1), operation operating mechanism drives connecting axle to make in screwdriver bit and drill bit one to be in collecting position; 2) another, operating that operating mechanism drives connecting axle to make in screwdriver bit and drill bit is in operating position.

Preferably, in described step 1) before, also comprise the step loading working head from described output shaft.

Preferably, it is characterized in that: the step loading working head from described output shaft comprises sub-step, first another in screwdriver bit or drill bit is filled into output shaft, operation operating mechanism drive connecting axle to make in screwdriver bit or drill bit another be in collecting position; In screwdriver bit or drill bit one is filled into output shaft.

Preferably, it is characterized in that: described step 1) before, the working head supporting mechanism that at least one screwdriver bit and at least one drill bit are housed is loaded casing.

Preferably, it is characterized in that: described step 2) after, remove another screwdriver bit and drill bit from described output shaft, then in the screwdriver bit that will replace or drill bit one is filled into output shaft.

Preferably, described step 2) after, operation operating mechanism drive connecting axle to make in screwdriver bit and drill bit another be in collecting position; Operation operating mechanism drives connecting axle to make in screwdriver bit and drill bit one to be in operating position.

Preferably, described operating mechanism comprises the operating parts controlling described connecting axle axially-movable, described step 1) in draw described operating parts to drive connecting axle to make in screwdriver bit and drill bit one to be in collecting position along direction from output shaft to motor.

Preferably, described operating mechanism comprises the operating parts controlling described connecting axle axially-movable, described step 2) in push away along direction from motor to output shaft that described operating parts drives connecting axle to make in screwdriver bit and drill bit another be in operating position.

Preferably, described operating mechanism comprises the operating parts controlling described connecting axle axially-movable, reseting elastic element is provided with between described operating parts and casing or between connecting axle and casing, described step 2) in the described operating parts of release, described connecting axle make in screwdriver bit and drill bit under the effect of reseting elastic element another be in operating position.

Preferably, described hand held electric tool also comprises the position-limit mechanism be arranged between casing and connecting axle, described connecting axle makes one of them working head be in operating position, described position-limit mechanism restriction connecting axle moves to the direction away from described working head, described step 1) before, draw described operating parts to remove the restriction of position-limit mechanism to connecting axle axially-movable along the direction from output shaft to motor.

Preferably, described operating mechanism also comprises the motion in response to described operating parts and the automatic switching control equipment regulated the position of working head, described step 1) after and step 2) before, draw along direction from output shaft to motor and/or push away along the direction from motor to output shaft described operating parts with drive another in described screwdriver bit or drill bit at the move under influence of automatic switching control equipment to the position corresponding with described output shaft axis.

Preferably, described operating mechanism also comprises the motion in response to described operating parts and the automatic switching control equipment regulated the position of working head supporting mechanism, described step 1) after and step 2) before, draw along direction from output shaft to motor and/or push away described operating parts along the direction from motor to output shaft to drive described working head supporting mechanism at the move under influence of automatic switching control equipment to another in described screwdriver bit or drill bit and position corresponding to described output shaft axis.

Preferably, described operating parts is lid and can covers a part for described working head supporting mechanism, described step 1) after and step 2) before, draw described operating parts to expose a part for described working head supporting mechanism along direction from output shaft to motor, stir described working head supporting mechanism and make another in described screwdriver bit or drill bit corresponding with described output shaft axis.

Preferably, described operating parts is lid and can covers a part for described working head, described step 1) after and step 2) before, draw described operating parts to expose a part for described working head along direction from output shaft to motor, stir described working head and make another in described screwdriver bit or drill bit corresponding with described output shaft axis.

Preferably, described hand held electric tool also comprises the position-limit mechanism be arranged between casing and connecting axle, described operating mechanism comprises the operating knob coordinated with position-limit mechanism, described connecting axle makes one of them working head be in operating position, described position-limit mechanism restriction connecting axle moves to the direction away from described working head, described step 1) before, along perpendicular to work cephalomotor direction push button to remove the restriction of position-limit mechanism to connecting axle axially-movable.

Compared with prior art, the invention has the beneficial effects as follows: hand held electric tool of the present invention achieves the quick switching of electric drill and screwdriver function by simple structure, and simple to operate, improves operating efficiency.

Accompanying drawing explanation

Fig. 1 be the hand held electric tool in preferred first embodiment of the present invention in running order time sectional view.

Fig. 2 is the part isometric exploded view of hand held electric tool in Fig. 1.

Fig. 3 be in Fig. 1 in along the sectional view of A-A line.

Fig. 4 is the sectional view along B-B line in Fig. 3.

Fig. 5 be hand held electric tool of the present invention in running order time schematic perspective view.

Fig. 6 be hand held electric tool of the present invention in running order time slip lid part upward view.

Fig. 7 is the sectional view of the connecting axle of hand held electric tool of the present invention when being unlocked.

Fig. 8 is the upward view of the slip lid part of the connecting axle of hand held electric tool of the present invention when being unlocked.

Fig. 9 is the connecting axle of hand held electric tool of the present invention sectional view when being in release conditions.

Figure 10 is the upward view of the connecting axle of hand held electric tool of the present invention slip lid part when being in release conditions.

Figure 11 is the sectional view after the position of the storage folder of hand held electric tool of the present invention is conditioned.

Figure 12 is that the position of the storage folder of hand held electric tool of the present invention is conditioned the upward view of rear slip lid part.

Figure 13 is the sectional view along C-C line in Figure 11.

Figure 14 is the schematic perspective view after the position of the storage folder of hand held electric tool of the present invention is conditioned.

Figure 15 be the connecting axle of hand held electric tool of the present invention when getting back to operating position from release conditions and controlling organization reset before sectional view.

Figure 16 be the connecting axle of hand held electric tool of the present invention when getting back to operating position from release conditions and controlling organization reset before the upward view of slip lid part.

Figure 17 is the part isometric exploded view of the hand held electric tool in preferred second embodiment of the present invention.

Figure 18 be the hand held electric tool in preferred second embodiment of the present invention in running order time part isometric schematic diagram.

Figure 19 is the part isometric schematic diagram of the connecting axle of hand held electric tool in preferred second embodiment of the present invention when being unlocked.

Figure 20 is the connecting axle of hand held electric tool in preferred second embodiment of the present invention part isometric schematic diagram when being in release conditions.

Figure 21 is the schematic perspective view after the storage double-layered quilt driven rotary of the hand held electric tool invented in preferred second embodiment.

Figure 22 is the part isometric schematic diagram of the connecting axle of hand held electric tool in preferred second embodiment of the present invention when getting back to operating position from release conditions.

Figure 23 be the hand held electric tool in preferred 3rd embodiment of the present invention in running order time sectional view.

Figure 24 is the part isometric exploded view of hand held electric tool in Figure 23.

Figure 25 is the phantom along D-D line in Figure 23.

Figure 26 is the three-dimensional installation diagram of the hand held electric tool inside in preferred 3rd embodiment of the present invention.

Figure 27 is the sectional view along E-E line in Figure 23.

Figure 28 is that the connecting axle of hand held electric tool in preferred 3rd embodiment of the present invention drives working head to get back to the sectional view storing folder.

Along the sectional view of F-F line in Figure 29 and Figure 28.

Figure 30 and Figure 28 is similar, now stores folder and moves to its center line position corresponding with output shaft.

Figure 31 and Figure 28 is similar, now stores the position pressing from both sides and move to sliding pin and contact with guide plate.

Figure 32 and Figure 28 is similar, now stores folder and moves to the position corresponding with output shaft, another collecting storehouse.

Figure 33 and Figure 28 is similar, and the working head now in another collecting storehouse enters output shaft, and slip lid resets.

Wherein,

1. casing 2. motor 3,3a. transmission mechanism

4,4a. output shaft 6. battery 7. press button

9, working head 11. handle 13,13a. fore shell

15. gathering sill 16. stop block 21. motor shafts

22. gear-boxes 30,30a. pinion gear mechanism

31,31a. planetary gear reducing mechanism 40. axle sleeve

41. accepting hole 50. fixed blocks 51,51a. connecting axle

52,52a. stores folder 53, locking piece of 53a. slip lid 55.

59. bearing ribs 60,60a. controlling organization 61,61a. ratchet

62,62a. supporting seat 63,63a. torsion spring 65. torsion spring

742. tips 70,70a. movement conversion mechanism

71,71a. oscillating deck 72,72a, 72b. cam path

73. first travelling gear 74. guide plate 75. stop columns

76. gusset 81. limited block 82. bearing pins

83. torsion spring 133. opened portion 134. radial direction through hole

Pushing block after 151. tooth bar pushing block 152. Compress Springs 153.

155. guiding surface 221. dividing plate 223. toothed wheel box cover plates

225. arched member 226. gripper shoes 301,301a. first gear

302,302a. second gear 303,303a. the 3rd gear 403. external tooth

511. magnet 521. make head collecting storehouse 522. locating slot

523. ratchet-gear wheel 524. magnet 531. guide rails

535. first locking groove 536. second locking groove 538. separate lock section

551. first projection 552. second projection 553. flexure strips

623. second travelling gear 701. first chute 702. second chutes

711,711a, 711b. sliding pin 712. shift fork 721,721a. switching part

722,722a. reset portion 723. straight flange 724. hypotenuse

732. convex handle 741. top 742a, 742b. afterbodys

901. first tooth bar 902. second tooth bar 903. first pinions

904. gear wheel 905. second pinion 906. third pinions

Bore a hole in 2261. first stopper section 2263., stopper sections 2262. second

5221. first side 5111., sides 5222. second are protruding

5211. locating slot

Detailed description of the invention

In the preferred embodiment of hand held electric tool of the present invention, hand held electric tool is can realize boring and the multifunction drill of screwdriver function, and also have direct current and dividing of exchanging in electric drill, the present invention is preferably specifically described for D.C. electric drill.

Shown in Fig. 3, this D.C. electric drill comprises casing 1, motor 2, battery 6, transmission mechanism 3, connecting axle 51, working head supporting mechanism and output shaft 4.Casing 1 is closed up by symmetrical two and half housings assembled by screw (not shown), its handle 11 part that there is horizontal component and arrange in obtuse angle with horizontal component, the preferred angle of the present invention, can be pleasant when such gripping handle 11 operates between 100 degree to 130 degree.Be provided with press button 7 on the top of handle 11 part, battery 6 is fixed on the rear portion of handle 11 part, and transmission mechanism 3 partial fixing is housed in the horizontal component of casing 1.As preferred embodiment, this battery 6 can be lithium ion battery.It should be noted that, here the general name of said lithium ion battery to be negative material the be rechargeable battery of elemental lithium, according to the difference of positive electrode, it can form many systems, as " lithium manganese " battery, and " lithium iron " battery etc.In the present embodiment, the lithium ion battery of lithium ion battery to be a joint rated voltage be 3.6V (volt).Certainly, battery 6 also can be the battery types well known to those skilled in the art such as NI-G, ni-mh.

Transmission mechanism 3 comprises by (be rear with the right side of drawing) before backward the planetary gear reducing mechanism 31 and pinion gear mechanism 30 that are driven by motor 2, wherein pinion gear mechanism 30 is connected with connecting axle 51, and by connecting axle 51, the rotary motion of motor 2 is passed to output shaft 4.Wherein working head supporting mechanism is for storing different working heads, here working head mainly refers to Philip's head screw screwdriver bit, slot type screwdriver head, drill bit etc. that electric drill is conventional, and working head comprises at least one drill bit and at least one screwdriver bit, move axially through working head supporting mechanism by operation connecting axle or leave working head supporting mechanism, just can change between drill bit and screwdriver bit fast, thus electric drill can carry out the work of holing or beating screw.

Motor in the preferred embodiment for the present invention is motor 2, and motor 2 has the motor shaft 21 extended forward from electric machine casing.Motor 2 is fixed in casing 1, one gear-box 22 to be fixed in casing 1 and to be positioned at the front portion of motor 2, gear-box 22 is for accommodating planetary gear reducing mechanism 31 and pinion gear mechanism 30, by arranging dividing plate 221 between planetary gear reducing mechanism 31 and pinion gear mechanism 30, the two is separated, and toothed wheel box cover plate 223 is set between gear-box 22 and working head supporting mechanism, transmission mechanism 3 and working head supporting mechanism can be separated like this, namely transmission mechanism 3 and working head supporting mechanism are separate.Pinion gear mechanism 30 comprises can the first gear 301 of being connected of transmitting torque with planetary gear reducing mechanism 31, the 3rd gear 303 be connected with connecting axle 51 and the second gear 302 engaged with the first gear 301 and the 3rd gear 303, the rotation of the first gear 301 is passed to the 3rd gear 303 by the second gear 302, and the two ends of each gear are supported by axle sleeve.The middle part of dividing plate 221 is provided with the hole supplying the axle of the first gear 301 to pass, the end face of dividing plate 221 is provided with the groove for installing axle sleeve, the rear axle housing supporting pinion gear mechanism 30 is fixed on dividing plate 221, front shaft sleeve is fixed on toothed wheel box cover plate 223, toothed wheel box cover plate 223 and gear-box 22 are fixedly linked by screw, buckle etc., so, namely pinion gear mechanism 30 and planetary gear reducing mechanism 31 can be separated, both can be closed again simultaneously, prevent dust, powder etc. from entering transmission mechanism 3 inner, also can prevent the leakage of lubricating oil.In addition, three gears are set just in order to make the inner space of instrument compacter, thus do not affect the attractive in appearance of outside.Certainly, also can be arranged to two gears as required, one is connected with planetary gear reducing mechanism 31, and another is connected with connecting axle 51.In addition, transmission mechanism 3 is not limited to above-described form, and transmission mechanism 3 can only include planetary gear reducing mechanism 31, or only includes pinion gear mechanism 30, or other rotary motion transmission mechanism, as ratchet mechanism, turbine mechanism etc.Wherein planetary gear reducing mechanism 31 has three grades of deceleration systems, motor shaft 21 extension is engaged with planetary gear reducing mechanism 31, rotary motion is passed to pinion gear mechanism 30 by planetary gear reducing mechanism 31, and pinion gear mechanism 30 drives connecting axle 51 to rotate, and connecting axle 51 again driver output axle rotates.When such motor 2 runs, by planetary gear reducing mechanism 31, pinion gear mechanism 30, finally exported by output shaft 4.This shows, the driving-chain in present embodiment is motor-transmission mechanism-connecting axle-output shaft, and namely connecting axle is as a part for driving-chain.In addition, reducing gear is made up of three stage planetary reduction and the two poles of the earth parallel axes 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.

D.C. electric drill of the present invention is also provided with operating mechanism, and operating mechanism comprises the slip lid 53 be slidably connected on casing 1, and slip lid 53 moves to drive connecting axle 51 to move axially along casing.The edge of slip lid 53 is provided with guide rail 531, and corresponding casing 1 is provided with gathering sill 15, and slip lid 53 is arranged in gathering sill 15 can be slid axially relative to casing 1 by its guide rail 531.Certainly, also can be that slip lid 53 arranges gathering sill, mode casing 1 being arranged guide rail makes slip lid move.

Casing 1 comprises the fore shell 13 being connected to its front end, the top of fore shell 13 is provided with opened portion 133, the bottom of fore shell 13 is provided with and opened portion 133 radial aperture 134 diametrically, a part for working head supporting mechanism is housed in fore shell 13, another part is covered by slip lid 53, along with the movement of slip lid 53 is exposed from opened portion 133, now can from the position of opened portion 133 manual adjustments working head supporting mechanism, and directly finger can be reached in radial aperture 134 and just working head supporting mechanism can be ejected from opened portion 133 and remove, again another one working head supporting mechanism is loaded casing from opened portion 133 just can use.Certainly, drive connecting axle 51 to move axially and also can realize by other means, as arranged handle on connecting axle 51, handle exposes casing at least partly for operation, and handle can be wholely set with connecting axle 51.Namely no matter being slip lid or handle, is all the multi-form of operating parts, and its effect is all drive connecting axle 51 to move axially, and concrete form can be arranged according to the actual needs.

The preferred working head supporting mechanism of the present invention is cylindric storage folder 52, conveniently rotates, and takes up room little simultaneously, can certainly be arranged to square, leg-of-mutton, strip, shelf-like etc.When electric drill work, slip lid 53 abuts with fore shell 13, storage folder 52 all can be closed with connecting axle 51 like this.On toothed wheel box cover plate 223, the position of corresponding connecting axle 51 is provided with the hole passed for connecting axle 51, gear-box 22 there is arched member 225 around connecting axle 51 Axis Extension, arched member 225 can be wholely set with gear-box 22, also can be provided separately, can by partially enclosed for connecting axle 51 by arranging arched member 225, when electric drill carries out change working head 9, namely the position that slip lid 53 moves to rearmost end also out exposed for connecting axle 51, can not can prevent the inside of the entering tool such as dust, powder like this.And toothed wheel box cover plate 223 extends to the end face of arched member 225, thus vertically by transmission mechanism 3 integrally closed together.In the course of the work, storage folder 52 can be closed by slip lid 53, thus prevents dust from entering, and when working head changed by needs, removes slip lid 53 and can expose storage folder 52, the working head that convenient selection is different.

Store that folder 52 is rotatable is supported between toothed wheel box cover plate 223 and output shaft 4, store on folder 52 and be evenly distributed with multiple working head collecting storehouse 521 along its circumferencial direction, that is working head has multiple receiving space, and multiple receiving space is set up in parallel along the rotation storing folder 52.What wherein accommodate at least one working head collecting storehouse 521 is drill bit, like this by regulating the position storing folder 52 just can realize the operating position that drill bit is positioned at the accepting hole 41 of output shaft 4.The quantity that the present invention preferably arranges working head collecting storehouse 521 is two and plural even number, drill bit and screwdriver bit interval can be arranged like this, just can realize the quick change of brill and screwdriver function within the shortest time.

Working head collecting storehouse 521 is closed along storage folder 52 is axially a part of, and a part of excircle opens wide, and such handled easily person selects the shape that can be easy to see from the part of opening wide working head 9 head during working head 9, thus selects the working head 9 of needs fast.Certainly, those skilled in the art are easy to expect, working head collecting storehouse 521 also can be totally enclosed, only need identify in the position of correspondence, or directly makes transparent by storage folder 52, can conveniently identify.In addition, elasticity location can be carried out between storage folder 52 and toothed wheel box cover plate 223, namely on the end face storing toothed wheel box cover plate 223 faced by folder 52, the position of corresponding working head 9 arranges locating slot 522, locating slot 522 is corresponding with collecting storehouse 521, toothed wheel box cover plate 223 is arranged the steel cap compressed by spring, or shell fragment, so, storage folder 52 often turns over a working head 9 steel cap or shell fragment all can send the voice prompt falling into locating slot 522, thus operator selects to avoid the angle of storage folder 52 rotation and connecting axle 51 to stagger during working head 9.Coordinate with reference to shown in Fig. 9, the middle part storing folder 52 is provided with magnet 524 along being parallel to working head length direction, magnet 524 is for remaining in working head collecting storehouse 521 by working head, even if removed in casing 1 by storage folder 52, working head also can not drop in storage folder 52.The top of fore shell 13 is provided with opened portion 133, the bottom of fore shell 13 is provided with and opened portion 133 radial aperture 134 diametrically, when working head storage folder 52 changed by needs, operation slip lid 53 moves to the direction of motor 2, main shaft 51 is also along with slip lid 53 moves to the position storing folder 52 with working head and separate, direct like this to be reached by finger in radial aperture 134 just can store folder 52 working head and eject from opened portion 133 and remove, then storage another one being provided with different working heads is pressed from both sides and loaded casing from opened portion 133 and just can use.Foregoing is by the different working head of the way selection of storage folder 52 rotation, can certainly by storing the mode of intermediate straight line motion, and the radial direction that such as working head presss from both sides along storage is arranged side by side, and selecting just needs during working head radially to promote to store folder.Storing folder 52 in addition in the preferred embodiment of the present invention is axial restraints, move working head by connecting axle 51 Axially moving belt enter output shaft and carry out work, connecting axle axial restraint can certainly be arranged to, move axially by storing folder the mode rotating or move radially to select working head again, thus also can realize taking off the quick-replaceable that working head just can realize working head.

Output shaft 4 is form of sleeve, there is the accepting hole 41 axially run through, generally accepting hole 41 is arranged to the form of hexagonal hole, can installment work head thus make working head be in operating position in it, the cross section of working head shank is the regular hexagon matched with hexagonal hole, or accepting hole is arranged to other polygonal hole, and the polygon that matches with accepting hole 41 is arranged in the shank cross section of screwdriver bit and drill bit, can realize the transmission of moment of torsion.The diameter dimension of accepting hole 41 should meet the working head can installing largest diameter, considers the size of instrument, volume and easy to operate situation, and the diameter of accepting hole should between 5 millimeters to 15 millimeters.Output shaft 4 is supported in the axial aperture 131 of fore shell 13 by an axle sleeve 40, and axle sleeve 40 provides radial support to output shaft 4, can certainly be realized the radial support of output shaft 4 by bearing.Connecting axle 51 of the present invention is also hexagon, hexagonal hole is provided with in 3rd gear 303, for connecting with connecting axle 51 and rotary power being passed to connecting axle 51, such connecting axle 51 inserts output shaft 4 and output shaft 4 can be driven to rotate, and then drive working head 9 to rotate by output shaft 4, the working head 9 of standard can be used like this, and without the need to offering the hole of collecting working head 9 on connecting axle 51, avoid the weight and volume of the excessive increase complete machine of connecting axle 51 diameter.Like this, what directly drive working head 9 to rotate is output shaft, shorten the distance of torque transfer, thus the use of instrument is more reliable.Above-described is that connecting axle moves the mode of working head rotation by output shaft indirect belt, but, those skilled in the art are easy to expect that other transmission means substitutes, such as connecting axle directly drives working head to rotate, namely connecting axle directly with working head can the mode of transmitting torque be connected, or output shaft is driven by direct geared, and connecting axle only stores folder for releasing working head and driving working head to get back to.

The front end of connecting axle 51 is provided with magnet 511, for adsorbing working head 9, when selecting good berth head 9, can operate slip lid 53 drives connecting axle 51 through the working head collecting storehouse 521 of this working head 9 of collecting, the magnet 511 that working head 9 is connected on axle 51 adsorbs, and under the promotion of connecting axle 51, leave working head collecting storehouse 521, enter output shaft 4.When work, connecting axle 51 drives output shaft 4 to rotate, and output shaft 4 drives working head 9 to rotate.

Electric drill needs working head 9 to be axially pressed on screw or workpiece when operating, such work 9 can be subject to a reverse responsive to axial force, move after producing connecting axle 51, on connecting axle 51 of the present invention, axial restraint is provided with a fixed block 50, the rear end of connecting axle 51 is rotating to be against on fixed block 50, the place closing on fixed block 50 in the rear end of connecting axle 51 is provided with the position-limit mechanism preventing connecting axle 51 from retreating, position-limit mechanism comprises pivotable limited block 81, along the torsion spring 83 of limited block 81 pivotal orientation bias voltage limited block 81.Wherein fixed block 50 is caught in one end of limited block 81, and the other end is arranged on gear-box 22 or on casing 1 by a bearing pin 82, and the axes normal of bearing pin 82 is in the axis of connecting axle 51, and limited block 81 can rotate within the scope of certain angle around bearing pin 82.One end of torsion spring 83 is fixed on limited block 81, and the other end is against on gear-box 22 or on casing 1, and the elastic force of torsion spring 83 makes limited block 81 remain on the position offseted with fixed block 50.Such position-limit mechanism 8 preferably arranges two, and the axisymmetrical along connecting axle 51 distributes, and can keep stress balance like this, makes the axial limiting of connecting axle 51 more reliable.

Slip lid 53 drives connecting axle 51 to move by the mode be connected with fixed block 50, when needs mobile link axle 51, also can remove restriction to connecting axle 51 movement by slip slip lid 53.Fixed block 50 has the square of hollow, the inside of slip lid 53 is provided with locking piece 55, there is for locking piece 55 the first projection 551 stretching into fixed block 50 hollow bulb, in the duty of electric drill, the rear side axially spaced-apart of projection and fixed block 50 hollow has distance S, when slip lid 53 slides backward, namely slide in the direction towards motor 2, slided after distance S, the first projection 551 axially abuts with the rear side of fixed block 50 hollow, thus slip lid 53 drives fixed block 50 then to drive connecting axle 51 axially to move backward; In the state of the replaceable working head of electric drill, first projection 551 has distance S with the front side axially spaced-apart of fixed block 50 hollow, when slip lid 53 forward slip, namely slide in the direction towards output shaft 4, slide after distance S, the front side shaft of the first projection 551 and fixed block 50 hollow is to abutting, thus slip lid 53 drives fixed block 50 then to drive connecting axle 51 axially to move forward.Slip lid 53 inside is provided with the solution lock section 538 matched with limited block 81, when slip lid 53 moves backward, separate a contacts side surfaces of lock section 538 and limited block 81, and the elastic force effect that limited block 81 overcomes torsion spring 83 under the drive of separating lock section 538 rotates around bearing pin 82, until limited block 81 and fixed block 50 are thrown off, fixed block 50 is unlocked, thus limited block 81 is in the position allowing connecting axle 51 axially-movable.Connecting axle 51 continues to move axially, and limited block 81 is stuck in the two ends of fixed block 50, now just can carry out replacing working head.This shows, before slip lid 53 drives connecting axle 51 to move, first sliding distance S is the restriction removing the axially-movable of limited block 81 pairs of connecting axles 51, as long as therefore the movement that distance S meets slip lid 53 can remove the locking of limited block 81 pairs of connecting axles 51 axially-movable.After working head is more finished changing, slip lid 53 moves forward, connecting axle 51 and fixed block 50 is driven also to move forward, separate lock section 538 again contact with the side of limited block 81 and separate along with the reach of slip lid 53, limited block 81 comes back to the position axially offseted with fixed block 50 under the effect of torsion spring 83, when such electric drill work, output shaft 4 is stretched in connecting axle 51 front end, be located at fixed block 50 limited piece of 81 axial limitings of connecting axle 51 rear end, the axially-movable of such connecting axle 51 is limited, namely connecting axle 51 cannot retreat, thus the use of electric drill is more reliable.

Certainly, it is a lot of that slip lid 53 drives the mode of connecting axle 51 movement to also have, as the annular groove around its outer week Monday can be arranged on connecting axle 51, slip lid 53 is extend in annular groove by a pin or steel wire ring and is connected with connecting axle 51, so neither affect the rotation of connecting axle 51, also do not affect the movement that slip lid 53 drives connecting axle 51.No matter be which kind of mode, its principle is all that slip lid first has one section of idle stroke, and namely slip lid 53 moves relative to casing 1 before this, and connecting axle 51 is fixed relative to casing 1, and then slip lid 53 drives connecting axle 51 to move again.

In addition, flexible member can be set between slip lid 53 and casing 1 or between connecting axle 51 and casing 1, operation slip lid 53 drives connecting axle 51 that working head is moved from operating position to collecting position, only need unclamp or discharge slip lid 53, connecting axle 51 can automatically make working head move from collecting position to operating position under elastic force.

And, those skilled in the art are also easy to the locking expecting also realizing removing the axially-movable of limited block 81 pairs of connecting axles 51 without the need to the mode by slip lid 53 movement, as arranged the knob be connected with limited block 81 outward at casing 1, limited block 81 is driven to overcome spring force rotation or move by rotating knob; Or outside casing 1, the toggle matched with limited block 81 or button are set, also limited block 81 can be driven to overcome spring force rotation or move etc. by promoting toggle or pressing button, the locking removing the axially-movable of limited block 81 pairs of connecting axles 51 can be realized.

The above-described embodiment for needing operator manually to select working head, when needs switch operating head 9, only need operate slip lid 53 drives connecting axle 51 axially to move to the direction of motor 2, the magnet 511 of connecting axle 51 end adsorbs the drill bit that is housed in output shaft 4 or screwdriver bit gets back to collecting position, manual toggle store folder 52 or working head 9 until the screwdriver bit that will select or drill bit corresponding with output shaft 4 axis, operating slip lid 53 again drives connecting axle 51 axially to move to the direction of output shaft 4, the screwdriver bit will selected like this or drill bit will be connected axle 51 and shift the operating position being positioned at output shaft 4 onto.Before switch operating head, can be prestored working head, the mode prestored has a lot, such as can load from output shaft 4, namely from front loaded screwdriver bit or the drill bit of output shaft 4, connecting axle 51 moves and brings it to collecting position, turn over a collecting position, connecting axle 51 resets, then loads another, by that analogy; Or directly the storage that is equipped with screwdriver bit and drill bit is clamped in D.C. electric drill.Certainly, in use also can change at any time if necessary, as screwdriver bit or drill bit removed from output shaft 4, then the screwdriver bit that will replace or drill bit are filled into output shaft 4; Or directly remove store folder 52, then the storage filling screwdriver bit in need and drill bit that will replace clamp into.This shows, often operate slip lid 53 and drive connecting axle 51 to move back and forth once, just can realize the switching of one action head.

Operating mechanism of the present invention also comprises the automatic switching control equipment of automatic switchover working head, connecting axle 51 is driven to leave working head collecting storehouse 521 as long as that is operate slip lid 53, remove the restriction to storing folder 52 motion, store the corresponding position axial with output shaft 4, collecting storehouse that folder 52 rotates to next working head automatically under the effect of automatic switching control equipment, store folder 52 without the need to the rotation that operator is manual again and select working head.

Fig. 1 is to the first embodiment that Figure 19 shows that hand held electric tool automatic switching control equipment of the present invention.

Shown in seeing figures.1.and.2, automatic switching control equipment comprises for driving the controlling organization 60 storing folder 52 and move, controlling organization 60 comprises and stores the ratchet 61 that folder 52 is flexibly connected and the supporting seat 62 installing ratchet 61, one end of ratchet 61 is rotatable to be arranged on supporting seat 62, the other end can be stuck in the locating slot 522 of storage folder 52, arrange torsion spring 63 between ratchet 61 and supporting seat 62, the partial pressure that ratchet 61 is subject to torsion spring 63 keeps being stuck in locating slot 522.Wherein, supporting seat 62 is rotatable to be supported on toothed wheel box cover plate 223, and so, when supporting seat 62 drives ratchet 61 to rotate time, ratchet 61 can drive storage folder 52 to rotate together.Can support reliably to make supporting seat 62, gripper shoe 226 can be set between storage folder 52 and controlling organization 60, ratchet 61 arranges l-shaped, can cross gripper shoe 226 is stuck in locating slot 522, and the rotating shaft of supporting seat 62 also can be supported on toothed wheel box cover plate 223 in one end, the other end is supported in gripper shoe 226.The position of the corresponding connecting axle 51 of gripper shoe 226 is provided with perforation 2263, passes, do not affect moving axially of connecting axle 51 like this for connecting axle 51.

In the present embodiment, rotarily drive storage folder 52 by drived control mechanism 60 to move, the first kind of way that drived control mechanism 60 rotates is that accumulation of energy drives, automatic switching control equipment also comprises the Storage Unit be connected with controlling organization 60, when connecting axle 51 drives screwdriver bit or drill bit to move to operating position, the energy of Storage Unit is stored, when connecting axle 51 drives screwdriver bit or drill bit to get back to collecting position, the energy of Storage Unit is released and drives storage folder 52 to move with drived control mechanism 60.Preferred Storage Unit is torsion spring 65, be arranged between controlling organization 60 and gripper shoe 226, one end of torsion spring 65 is fixed in gripper shoe 226, the other end is connected on the supporting seat 62 of controlling organization 60, when connecting axle 51 makes screwdriver bit or drill bit be in operating position, torsion spring 65 is in the state of compression, makes screwdriver bit or drill bit be in collecting position once connecting axle 51 leaves the collecting storehouse 521 storing folder 52, and controlling organization 60 can drive storage folder 52 to rotate under the effect of torsion spring 65.

The second way that drived control mechanism 60 rotates is actuated by cams, namely controlling organization 60 is connected with slip lid 53, after slip lid 53 control connection axle 51 makes screwdriver bit or drill bit be in collecting position, the exercisable drived control mechanism 60 of slip lid 53 drives storage folder 52 to move.Movement preferably through slip lid 53 comes drived control mechanism 60 and rotates, and slip lid 53 continues to move relative to casing 1, and drives controlling organization 60 to rotate simultaneously, is namely the rotary motion of controlling organization 60 by the transform linear motion of slip lid 53 by steering mechanism.What steering mechanism was conventional has pinion and-rack, worm stylus pin formula, circulating ball-rack tooth fan formula, circulating ball crank stylus pin formula, worm screw roller type, cam-type, crank-linkage type etc.

In present embodiment automatic switching control equipment, preferred steering mechanism is the movement conversion mechanism 70 be connected between controlling organization 60 and slip lid 53, the rotary motion of movement conversion mechanism 70 for by the transform linear motion of slip lid 53 being controlling organization 60.Movement conversion mechanism 70 comprises one relative to the oscillating deck 71 of casing 1 pivotable, and the middle part of oscillating deck 71 is provided with rotating shaft, and rotating shaft can be arranged on the arch portion 225 of gear-box 22.Oscillating deck 71 is provided with sliding pin 711 relative to one end of rotating shaft, and the other end forms shift fork 712.The inside top of slip lid 53 is provided with the cam path 72 coordinated with sliding pin 711, cam path 72 arranges the shape being roughly parallelogram along horizontal direction, article two, straight flange is parallel to the axis of connecting axle 51, article two, hypotenuse forms switching part 721 and the reset portion 722 of cam path 72 respectively, sliding pin 711 is along with the movement of slip lid 53 is along the boundary slip of cam path 72, often through a switching part 721 or reset portion 722, namely one end that oscillating deck 71 forms shift fork 712 swings around rotating shaft.The shift fork 712 of oscillating deck 71 is directly connected with the supporting seat 62 of controlling organization 60, is so just the rotation of controlling organization 60 by the transform linear motion of slip lid 53.

Further, between oscillating deck 71 and controlling organization 60, transferring rotational motion can be carried out by gear mechanism.The shift fork 712 of oscillating deck 71 connects the first travelling gear 73, first travelling gear 73 can be supported between toothed wheel box cover plate 223 and gripper shoe 226, first travelling gear 73 has a radial convex handle 732 protruded and is connected with shift fork 712, and the supporting seat 62 of controlling organization 60 is formed the second travelling gear 623, the rotation that shift fork 712 is converted into the first travelling gear 73 around the swing of rotating shaft can be passed to the second travelling gear 623 by the first travelling gear 73 and the engagement of the second travelling gear 623 then again, thus supporting seat 62 drives ratchet 61 to rotate.As long as because controlling organization 60 drives store the angle that folder 52 turns over a working head, as arranged six working heads, store folder and turn over 60 degree, so the first travelling gear 73 and the second travelling gear 623 are without the need to 360 degree of rotations, only need set according to the anglec of rotation storing folder 52, therefore the first travelling gear 73 and the second travelling gear 623 can be arranged to sector gear, teeth portion and the convex handle 732 of such first travelling gear 73 can be set to diametrically, the gear of the second travelling gear 623 and the part of installation ratchet 61 also can be diametrically, compact conformation can be made like this, save material.

Certainly, controlling organization 60 also can be other form by the mode that accumulation of energy drives, such as torsion spring is set between oscillating deck 71 and gear-box 22, one end of torsion spring is fixed on gear-box 22, the other end is connected on oscillating deck 71, when connecting axle 51 is in operating position, torsion spring is in the state of compression, once connecting axle 51 leaves and stores the collecting storehouse 521 of folder 52 and make screwdriver bit or drill bit be in collecting position, oscillating deck 71 drives the first travelling gear 73 to rotate then to drive supporting seat 62 to rotate under the effect of torsion spring.Or between the first travelling gear 73 and gripper shoe 226 (or toothed wheel box cover plate 223), torsion spring is set, one end of torsion spring is fixed on the first travelling gear 73, the other end is connected in gripper shoe 226 (or toothed wheel box cover plate 223), so also can realize controlling organization 60 and be driven by accumulation of energy.Thus, those skilled in the art are easy to expect, as long as arrange at the pivot part of drive disk assembly the accumulation of energy driving that torsion spring can realize controlling organization 60.

In addition, after the motion of slip lid 53 control connection axle 51 makes screwdriver bit or drill bit be in collecting position, slip lid 53 continues movement and can brought into motion switching mechanism 70 drived control mechanism 60 rotate, here slip lid 53 can continue to drive connecting axle 51 to move, and so needs to arrange the position-limit mechanisms such as steel wire gear or shell fragment between storage folder 52 and gripper shoe 226 and prevents from working head 9 to be connected axle 51 taking out of and accommodate storehouse 521.The present invention preferably arranges stop block 16 on casing 1, slip lid 53 arranges the first locking groove 535 and the second locking groove 536 along connecting axle 51 axially spaced-apart, locking piece 55 is arranged flexure strip 553, flexure strip 551 is stuck in the first locking groove 535 or the second locking groove 536, and flexure strip 553 can cross the first locking groove 535 or the second locking groove 536 after being out of shape, thus locking piece 55 can be moved relative to slip lid 53.Casing 1 is provided with slip lid stop block 16, and when connecting axle 51 moves axially, its fixed block 50 to be against on stop block 16 thus to be limited mobile.And slip lid 53 offers stopper slot 539, locking piece 55 has the second projection 552 be stuck in stopper slot 539, and the limited groove 539 of the movable meeting of slip lid 53 relative to locking piece 55 limits, and prevents slip lid 53 excessively movement.That is slip lid 53a moves an idle stroke, and the distance of such connecting axle 51a movement is minimum, the compact conformation of instrument.Namely slip lid drive connecting axle together relative to chassis movement, then connecting axle fix relative to casing and slip lid relative to chassis movement.

In the mode that controlling organization 60 is driven by accumulation of energy, as long as because be that connecting axle 51 leaves the collecting storehouse 521 storing folder 52 and makes screwdriver bit or drill bit be in collecting position, the energy of Storage Unit will be released, and continues mobile without the need to slip lid 53.And namely the fault offset of Storage Unit achieves the switching of working head, so the cam path 72 on slip lid 53 is without the need to arranging switching part 721, namely cam path 72 can be arranged to the trapezoidal shape of straight flange.

Be more than that accumulation of energy drives and operation slip lid drives the mode realizing controlling organization 60 and drive storage folder 52 to rotate, introduce the reset of controlling organization 60 below.Mobile slip lid 53 drives connecting axle 51 to make screwdriver bit or drill bit move to operating position from collecting position, connecting axle 51 enters next collecting storehouse 521, sliding pin 711 makes oscillating deck 71 rotate around its rotating shaft under the guiding of the reset portion 722 of cam path 72, oscillating deck 71 drives the first travelling gear 73 to rotate by shift fork 712, first travelling gear 73 drives supporting seat 62 to rotate, store in folder 52 because connecting axle 51 is stuck in, store folder 52 to be limited to rotate, the elastic force that supporting seat 62 just drives ratchet 61 to overcome torsion spring 63 leaves in locating slot 522, ratchet 61 rotates along with supporting seat 62 and falls in the resilient force of torsion spring 63 in next locating slot 522, so just, achieve controlling organization 60 relative to the rotation storing folder 52.

Rotate excessively to prevent controlling organization 60, can drive the terminal location storing folder 52 rotation that the first stopper section 2261 is set by corresponding controlling organization 60 in gripper shoe 226, the initial position that corresponding controlling organization 60 rotates relative to storage folder 52 arranges the second stopper section 2262, the rotation of controlling organization 60 is limited by the first stopper section 2261 and the second stopper section 2262, thus the controlling organization 60 that ensures to know clearly drives, and to store another one working head when folder 52 rotates to terminal location corresponding with output shaft 4 axis, when controlling organization 60 relative storage folder 52 rotates to initial position, ratchet 61 can not cross locating slot 522.

Can drive reliably to make ratchet 61 to store the while that folder 52 rotating and can be easy to exit locating slot 522, can be set to different angles along the first side 5221 storing folder 52 circumference with the second side 5222 in locating slot 522, preferably the first side 5221 is rectangular relative to the end face storing folder 52, and such ratchet 61 can drive storage folder 52 to rotate reliably; Second side 5222 is acute angle relative to the end face of storage folder 52, can exit locating slot 522 easily when such ratchet 61 resets.Meanwhile, ratchet 61 also can be arranged to the shape that matches with locating slot 522.In addition when ratchet 61 drives storage folder 52 to move to terminal location, ratchet 61 is positioned at the bottom storing folder 52, can be removed in casing 1 by storage folder 52 easily like this, to change another slack storage folder, thus the using function of the instrument of expansion.

Below will elaborate to the quick-replaceable process of working head in first embodiment of the invention.

Shown in Fig. 6, electric drill is in running order, and now depression of push button switch 7 can carry out the work of stubborn screw.With reference to shown in Fig. 7 to Fig. 8, when needs are replaced with drill bit, operation slip lid 53 is to the direction displacement S of motor 2, slip lid 53 removes the locking of limited block 81 pairs of connecting axles 51 by separating lock section 538, sliding pin 711 slides along the straight flange of cam path 72, locking piece 55 on slip lid 53 contacts with the fixed block 50 on connecting axle 51, and now slip lid 53 can drive connecting axle 51 to move in the same way with it.

Next, with reference to Fig. 9 to Figure 10, slip lid 53 drives connecting axle 51 to move to connecting axle 51 and working head in the same way with it by locking piece 55 and accommodates the position that storehouse 521 separates, connecting axle 51 drives screwdriver bit to get back to be positioned at the collecting position in working head collecting storehouse 521 by magnet 511, and sliding pin 711 slides into the critical localisation of switching part 721 along the straight flange of cam path 72.With reference to Figure 11 to Figure 14, continue to move slip lid 53 to the direction of motor 2, connecting axle 51 can not be continued mobile by stop block 16 restriction, the elastic force overcoming flexure strip 553 for locking piece 55 crosses the first locking groove 535 until flexure strip 553 falls into the second locking groove 536, the second projection 552 on locking piece 55 is subject to the restriction of the stopper slot 539 on slip lid 53, therefore slip lid 53 is limited to continue to move axially, and sliding pin 711 slides along the switching part 721 of cam path 72 and makes oscillating deck 71 rotate certain angle around its rotating shaft under the guiding of switching part 721, simultaneously, the shift fork 712 of oscillating deck 71 drives the first travelling gear 73 to rotate, first travelling gear 73 drives the second travelling gear 623 as supporting seat 62 to rotate, such supporting seat 62 drives ratchet 61 to rotate, ratchet 61 drives storage folder 52 to turn over certain angle, drill bit is brought to the position corresponding with output shaft 4 along with storing the rotation of folder 52, this completes the adjustment storing folder 52 or bit location.And fallen into the sound of the elasticity location of the second locking groove 536 by the flexure strip 553 on locking piece 55, operator can be easy to judge to store folder 52 and to have finished the work the switching of head.

Continue with reference to Figure 15 to Figure 16, direction to output shaft 4 is moved slip lid 53 and is resetted, slip lid 53 drives connecting axle 51 to move to the direction of output shaft 4, connecting axle 51 is provided with one end of magnet 511 and contacts with the afterbody of the drill bit of automatic switchover and adsorb this drill bit, connecting axle 51 drives drill bit to enter output shaft 4, until drill bit exposes from the front end of output shaft 4, drill bit is positioned at operating position, fixed block 50 on connecting axle 51 is stuck on arch portion 225, and now sliding pin 711 slides into the critical part of straight flange and reset portion 722 along cam path 72.Continue to move slip lid 53 to the direction of output shaft 4, flexure strip 553 on locking piece 55 overcomes resilient force and crosses the second locking groove 536 until flexure strip 553 falls into the first locking groove 535, and sliding pin 711 slides along the reset portion 722 of cam path 72 and makes oscillating deck 71 rotate certain angle around its rotating shaft under the guiding of reset portion 722, simultaneously, the shift fork 712 of oscillating deck 71 drives the first travelling gear 73 to rotate, first travelling gear 73 drives the second travelling gear 623 as supporting seat 62 to rotate, such supporting seat 62 drives ratchet 61 to rotate, and now store folder 52 be connected axle 51 through and can not rotate, therefore ratchet 61 turns over certain angle relative to storage folder 52, fall in another locating slot 522, slip lid 53 is returned to the position abutted with fore shell 13, the duty shown in Fig. 1 got back to again by electric drill, this completes the reset of controlling organization 60, but now electric drill realizes the function of boring by drill bit.Need if the working head selected above is not operator, step above repeats again, until the working head for needs exposed from output shaft 4.Or manual rotation stores folder 52 to select the working head of needs after mobile slip lid 53 exposes storage folder 52.

As seen from the above, the motion of connecting axle 51, the unblock of connecting axle 51 and to store the adjustment of folder 52 position be all realized along connecting axle 51 axially-movable by operation slip lid 53, so only slip lid 53 need be moved back and forth once when operation, with regard to one in changeable one-tenth drill bit or screwdriver bit; Move back and forth slip lid 53 more once, with regard to another in changeable one-tenth drill bit or screwdriver bit.Prestoring working head also can by installing the mode storing folder 52 or load working head 9 from output shaft, and load first job head, move back and forth slip lid 53 once, the first job head of filling is accommodated; Load second working head again, by that analogy, until all collecting storehouses 521 are filled, first job head will be connected axle 51 and shift operating position onto.Like this, the process operation that whole working head is changed is simple, fast, for the user, can increase work efficiency greatly.

Figure 17 to Figure 22 is depicted as the second embodiment of automatic switching control equipment of the present invention.

With reference to shown in Figure 17 to Figure 19, automatic switching control equipment comprises for driving the controlling organization 60a storing folder 52 and move, controlling organization 60a comprises and stores the ratchet 61a that folder 52 is flexibly connected and the supporting seat 62a installing ratchet 61a, what storage folder 52 one end was fixing relative to storage folder 52 circumference is provided with ratchet-gear wheel 523, ratchet-gear wheel 523 and storage folder 52 Concentric rotation, one end of ratchet 61a is rotatable to be arranged on supporting seat 62a, the other end matches with the ratchet-gear wheel 523 stored on folder 52, ratchet 61a can rotate around being parallel to the axis storing folder 52 rotation to be separated with ratchet-gear wheel 523 or to engage, torsion spring 63a is set between ratchet 61a and supporting seat 62a, the partial pressure that ratchet 61a is subject to torsion spring 63a keeps engaging with ratchet-gear wheel 523.Wherein, supporting seat 62a to be supported on toothed wheel box cover plate 223 and can to move along the direction perpendicular to connecting axle 51 axis, so, when supporting seat 62a drives ratchet 61a to move time, ratchet 61a can promote ratchet-gear wheel 523 and rotates then to drive and store folder 52 and rotate.

In the present embodiment, moved drive storage folder 52 to move by drived control mechanism 60a, identical with the first embodiment, the mode of drived control mechanism 60a movement has accumulation of energy driving and slip lid operation to drive.When accumulation of energy drives, automatic switching control equipment also comprises the Storage Unit be connected with controlling organization 60a, when connecting axle 51 moves to operating position, the energy of Storage Unit is stored, when connecting axle 51 moves to screwdriver bit or drill bit gets back to collecting position, the energy of Storage Unit is released and moves to drive storage folder 52 to move with drived control mechanism 60a.Preferred Storage Unit is Compress Spring, be arranged between controlling organization 60a and casing, one end of Compress Spring is against on supporting seat 62a, the other end is against on casing 1 or in gear box end cover 223, when connecting axle 51 is in operating position, Compress Spring is in the state of compression, once connecting axle 51 leaves the collecting storehouse 521 storing folder 52, controlling organization 60a can drive storage folder 52 to rotate under the effect of Compress Spring.

When slip lid drived control mechanism 60a moves, controlling organization 60a is connected with slip lid 53, and slip lid 53 control connection axle 51 moves to after screwdriver bit or drill bit get back to collecting position, and slip lid 53 exercisable drived control mechanism 60a moves and drives and stores folder 52 and move.Movement preferably through slip lid 53 carrys out drived control mechanism 60a and moves, after slip lid 53 drives connecting axle 51 to leave the collecting storehouse 521 storing folder 52, slip lid 53 continues to move relative to casing 1, and drive controlling organization 60a to move simultaneously, be namely the movement of controlling organization 60a by the transform linear motion of slip lid 53 by steering mechanism.

In present embodiment automatic switching control equipment, preferred steering mechanism is the movement conversion mechanism 70a be connected between controlling organization 60a and slip lid 53, the movement conversion mechanism 70a movement for being controlling organization 60a by the transform linear motion of slip lid 53.Movement conversion mechanism 70a comprises one relative to the oscillating deck 71a of casing 1 pivotable, and the middle part of oscillating deck 71a is provided with rotating shaft, and rotating shaft can be arranged on the arch portion 225 of gear-box 22.Oscillating deck 71a is provided with sliding pin 711a relative to one end of rotating shaft, and the other end forms linkage part 712a.The inner side of slip lid 53 is provided with the cam path 72a coordinated with sliding pin 711a, cam path 72a arranges the shape being roughly parallelogram along vertical direction, article two, straight flange is parallel to the axis of connecting axle 51, article two, hypotenuse forms switching part 721a and the reset portion 722a of cam path 72a respectively, sliding pin 711a is along with the movement of slip lid 53 is along the boundary slip of cam path 72a, often through a switching part 721a or reset portion 722a, namely the linkage part 712a of oscillating deck 71a swings around rotating shaft.The linkage part 712a of oscillating deck 71a is directly connected with the supporting seat 62a of controlling organization 60a, is so just the movement of controlling organization 60a by the transform linear motion of slip lid 53.

When controlling organization 60a resets, mobile slip lid drives connecting axle 51 to return back to operating position from off-position, connecting axle 51 enters next collecting storehouse 521, sliding pin 711a makes oscillating deck 71a rotate around its rotating shaft under the guiding of the reset portion 722a of cam path 72a, oscillating deck 71a drives supporting seat 62a to move by linkage part 712a, store in folder 52 because connecting axle 51 is stuck in, store folder 52 to be limited to rotate, one of them tooth of elastic force and ratchet-gear wheel 523 that supporting seat 62a just drives ratchet 61a to overcome torsion spring 63a is separated, ratchet 61a moves along with supporting seat 62a and engages with next tooth under the resilient force of torsion spring 63a, so just, achieve controlling organization 60a relative to the movement storing folder 52.

Below will elaborate to the quick-replaceable process of working head in second embodiment of the invention.

With reference to shown in Figure 17 to Figure 18, electric drill is in running order, and now depression of push button switch 7 can carry out the work of stubborn screw.With reference to shown in Figure 19, when needs are replaced with drill bit, operation slip lid 53 moves to the direction of motor 2, and slip lid 53 removes the locking of limited block 81 pairs of connecting axles 51 by separating lock section 538, sliding pin 711a slides along the straight flange of cam path 72a.

Next, with reference to Figure 20, slip lid 53 drives connecting axle 51 to move in the same way with it until connecting axle 51 drives screwdriver bit to get back to collecting position by magnet 511, and sliding pin 711a slides into the critical localisation of switching part 721a along the straight flange of cam path 72a.With reference to Figure 21, continue to move slip lid 53 to the direction of motor 2, sliding pin 711a slides along the switching part 721a of cam path 72a and under the guiding of switching part 721a, makes oscillating deck 71a rotate certain angle around its rotating shaft, simultaneously, the linkage part 712a of oscillating deck 71a drives supporting seat 62a to move, such supporting seat 62a drives ratchet 61a to move, ratchet 61a drives storage folder 52 to turn over certain angle, the rotation of boring in addition along with storing folder 52 is brought to the position corresponding with output shaft 4, this completes the adjustment of the position storing folder or drill bit.

With reference to Figure 22, direction to output shaft 4 is moved slip lid 53 and is resetted, slip lid 53 drives connecting axle 51 to move to the direction of output shaft 4, connecting axle 51 is provided with one end of magnet 511 and contacts with the afterbody of the drill bit of automatic switchover and adsorb this drill bit, connecting axle 51 drives drill bit to enter output shaft 4, until drill bit exposes from the front end of output shaft 4.Continue to move slip lid 53 to the direction of output shaft 4, sliding pin 711a slides along the reset portion 722a of cam path 72a and under the guiding of reset portion 722a, makes oscillating deck 71a rotate certain angle around its rotating shaft, simultaneously, the linkage part 712a of oscillating deck 71a drives supporting seat 62a to move, such supporting seat 62a drives ratchet 61a to move, and now store folder 52 be connected axle 51 through and can not rotate, therefore ratchet 61a crosses one of them tooth storing the upper ratchet-gear wheel 523 of folder, and engage with next tooth, slip lid 53 is returned to the position abutted with fore shell 13, the duty shown in Figure 17 got back to again by electric drill, this completes the reset of controlling organization 60a, but now electric drill carries out the work of holing by drill bit.Need if the drill bit selected above is not operator, step above repeats again, until what expose from output shaft 4 is the screwdriver bit of needs or another drill bit, or mobile slip lid 53 expose store folder 52 after manual rotation storage folder 52 to select the working head of needs.

In aforesaid operations process, slip lid 53 drives the mode of fixed block 50 movement on connecting axle 51 identical with the first embodiment by locking piece 55, repeats no more here.

Figure 23 to Figure 33 is depicted as the third embodiment of hand held electric tool of the present invention.The structure of the parts that label is identical with the first preferred embodiment and function and identical at the first preferred embodiment, repeat no more herein.With reference to shown in Figure 23 and Figure 24, in the present embodiment, transmission mechanism 3a is still made up of planetary gear reducing mechanism 31a and pinion gear mechanism 30a, wherein planetary gear reducing mechanism 31a is provided with arrangements for speed regulation, namely drive second level gear ring to move axially the element different from planetary gear reducing mechanism 31a by the speed switch bar (not shown) of operation setting on casing engage thus realize exporting different rotating speeds, such speed switches to technology well-known to those skilled in the art, and applicant does not repeat them here.Pinion gear mechanism 30a comprises the first gear 301a be connected with planetary gear reducing mechanism 31a, with the second gear 302a of the first gears meshing and driven by the second gear 302a and the 3rd gear 303a of synchronous rotary with it, what on output shaft 4a, circumference was fixing is provided with external tooth 403, and the 3rd gear 303a engages with external tooth 403 thus drives output shaft 4a to rotate.This shows, the driving-chain in present embodiment is motor-transmission mechanism-output shaft.

In present embodiment, preferred working head supporting mechanism is roughly box-like in cuboid storage folder 52a, the length direction storing folder 52a is parallel to the rotation of output shaft 4a, the width storing folder 52a has been set up in parallel two collecting storehouse 521a, just long working head can be accommodated, such as long drill bit, long screwdriver bit etc. in such collecting storehouse 521a.Store folder 52a relative to casing 1 axial restraint, connecting axle 51a moves axially to drive the working head 9a be housed in one of them collecting storehouse 521a to enter output shaft 4a relative to casing 1, or connecting axle 51a holds working head 9a by the magnet 511 being arranged on its front end and turns back in the 521a of this collecting storehouse, here connecting axle 51a is only for releasing or sucking back working head 9a, not as a part for driving-chain.Store folder 52a to be supported on casing 1 and to be positioned at the top of transmission mechanism 3a, store planetary gear reducing mechanism 31a axial overlap in folder 52a and transmission mechanism 3a and with motor 2 part axial overlap, complete machine can be made so compact, saving space.

With reference to shown in Figure 25 to 27, in the third embodiment, automatic switching control equipment comprises the movement conversion mechanism being arranged on and storing between folder 52a and slip lid 53a, slip lid 53a Linear-moving by movement conversion mechanism drive store folder 52a along with output shaft 4a axially direction translation angularly, the direction of preferred translation is perpendicular to the axis of output shaft 4a.Here movement conversion mechanism comprises the cam path 72b be arranged on slip lid 53a and the sliding pin 711b that storage folder 52a is fixing relatively, cam path 72b has the straight flange 723 that symmetrically arranged two hypotenuses 724 and two of being connected with two hypotenuses 724 are respectively parallel to output shaft 4a axis, sliding pin 711b can along with the movement of slip lid 53a in cam path 72b along straight flange 723 and hypotenuse 724 slippage, when sliding pin 711b is along hypotenuse 724 slippage, it had not only produced relative to slip lid 53a and had moved axially but also produced movement perpendicular to axial direction, therefore sliding pin 711b just drives storage folder 52a to move along the direction perpendicular to output shaft 4a axis.Sliding pin 711b can press from both sides 52a one-body molded with storage, also can be that metallic pin is fixed on and stores on folder 52a thus the intensity of increase sliding pin 711b.Movement conversion mechanism in present embodiment is used for the linear movement of slip lid 53a being converted to the linear movement storing folder 52a, except the form that above-mentioned cam path coordinates sliding pin, those skilled in the art can expect coordinating the mode of bevel-gear sett also can realize above-mentioned motion conversion by tooth bar easily.

In addition, in order to when preventing from surprisingly falling, sliding pin 711b staggers relative to the position of slip lid 53a, two gussets 76 parallel with straight flange 723 can be set between two of a cam path 72b straight flange 723, material is thus formed two parallel tracks thus limit sliding pin 711b and be merely able to slide between straight flange 723 and gusset 76, form the first chute 701 from the cross part of Article 1 straight flange 723 to two hypotenuses 724, form the second chute 702 from the cross part of Article 2 straight flange 723 to two hypotenuses 724.Simultaneously, move along projected path reliably to enable sliding pin 711b, the middle part that can have a common boundary at roughly two straight flanges 723 and two hypotenuses 724 arranges guide plate 74, and guide plate 74 can rotate along the axis of the plane perpendicular to sliding pin 711b movement locus place.Preferably, guide plate 74 is in Y type, to stagger setting relative to the axis of symmetry of hypotenuse 724 in the top 741 of Y type, the component that guide plate 74 can be driven to rotate when sliding pin 711b contacts with guide plate 74 is like this maximum, thus more easily drives guide plate 74 to rotate to enter predetermined track.Certainly, those skilled in the art are easy to expect, as long as the shape setting of guide plate 74 can meet sliding pin 711b rectilinear motion and contact with guide plate 74, sliding pin 711b can enter under the guiding of guide plate 74 planned orbit can, as triangle, rhombus, heart, falcate etc.Be provided with stop column 75 in cam path 72b, stop column 75 is positioned at forked afterbody 742a, 742b one end of tool of the Y type of guide plate 74.Stop column 75 is fixed on slip lid 53a, and afterbody 742a, 742b can conflict with stop column 75, thus guide plate 74 be stopped post 75 restriction can only rotate in certain scope, ensure that sliding pin 711b can enter predetermined track smoothly.Say above be stop column between two bifurcateds of Y type, two stop columns can certainly be established, lay respectively at the outside of two bifurcateds, equally also can the rotating range of restricted guidance plate 74.In addition, magnet is provided with in stop column 75, for holding guide plate 74, it is made to remain on fixing angle, such guarantee guide plate Y type top 741 axially stagger relative to the crossover sites of two hypotenuses 724, in case on-slip pin 711b and guide plate Y type top 741 contact and be obstructed motion.Arranging guide plate 74 can make sliding pin 711b have a two-way passage, and namely sliding pin 711b can move to the second end from the first end of cam path 72b, also can get back to first end from the second end smoothly, thus can realize the switching that replaces between two working heads.That is above-mentioned sliding pin and the form of cam path are not limited in the scheme storing folder translation, also can be applied to store to be clipped in the scheme rotated between two positions.

Also be drive connecting axle 51a axially-movable by mobile slip lid 53a in present embodiment, but the length storing folder 52a is longer, connecting axle 51a is made to need the distance of motion also longer, when connecting axle 51a is separated with collecting storehouse 521a, slip lid 53a moves to the rear end of motor 2, the length of complete machine can be made so very long, for this reason, in present embodiment, stroke amplifying mechanism is set between slip lid 53a and connecting axle 51a, slip lid 53a linear movement drives stroke amplifying mechanism to drive connecting axle 51a motion, thus the movement travel of connecting axle 51a is greater than the movement travel of slip lid 53a, that is the distance that the distance of slip lid 53a movement is less than connecting axle 51a movement also can realize connecting axle 51a and be separated with collecting storehouse.Certainly, also can stroke amplifying mechanism be set in the first and second embodiments, thus the length of complete machine can be shortened, reduce usage space.

Stroke amplifying mechanism comprises the first tooth bar 901, second tooth bar 902 and the speed increasing gear group engaged with the first tooth bar 901 and the second tooth bar 902, speed increasing gear group comprises the first pinion 903 driven by the first tooth bar 901, with the gear wheel 904 of the first pinion 903 synchronous rotary, the second pinion 905 engaged with gear wheel 904 and the third pinion 906 engaged with the second pinion 905 synchronous rotary and with the second tooth bar 902, wherein slip lid 53a is connected with the first tooth bar 901 and drives the first tooth bar 901 linear movement, second tooth bar 902 is arranged on connecting axle 51a, because the first pinion 903 is identical with gear wheel 904 rotating speed, wherein the number of teeth of gear wheel 904 is greater than the number of teeth of the second pinion 905, like this from the transmission of the first pinion 903 to the second pinion 905 be step-up drive, thus the movement velocity of the second tooth bar 902 increases relative to the first tooth bar 901.Preferably, the linear motion speed of the second tooth bar 902 is twices of the first tooth bar 901, that is the movement travel of the second tooth bar 902 is twices of the movement travel of the first tooth bar 901, such structure comparison is compact, coordination is compared in arranging of complete machine, can ensure that again the movement of connecting axle 51a can not be interfered by slip lid 53a simultaneously.

In above embodiment, slip lid 53a control connection axle 51a moves to and accommodates storehouse 521a and be separated, slip lid 53a continues movement can make sliding pin 711b drive storage folder 52a to move, so just need the distance of connecting axle 51a movement identical with the distance of slip lid 53a movement, simultaneously again because connecting stroke amplifying mechanism between slip lid 53a and connecting axle 51a, the distance of connecting axle 51a movement is greater than the distance of slip lid 53a movement, in order to make connecting axle can not pass slip lid 53a, such slip lid 53a just needs the longer of setting.

Continue with reference to Figure 25 and Figure 26, the present invention preferably arranges tooth bar pushing block 151 between slip lid 53a and the first tooth bar 901, tooth bar pushing block 151 and the first tooth bar 901 axially spaced-apart distance S, can be used for removing the locking to connecting axle 51a, concrete structure is identical with embodiment noted earlier, repeats no more here.

The side of tooth bar pushing block 151 is provided with Compress Spring 152, and opposite side can be stuck on the first tooth bar 901, and slip lid 53a drives the first tooth bar 901 to move by tooth bar pushing block 151.Casing 1 is provided with guiding surface 155, when slip lid 53a is with carry-over bar pushing block 151 to move to the position of guiding surface 155, the resilient force that tooth bar pushing block 151 overcomes Compress Spring 152 under the effect of guiding surface 155 is slided on the first tooth bar 901, thus slip lid 53a can not continue drive first tooth bar 901 moves, connecting axle 51a can not continue mobile.So, slip lid 53a control connection axle 51a moves to and accommodates storehouse 521a and be separated, slip lid 53a continues mobile to drive storage folder 52a to move, and connecting axle 51a is no longer along with slip lid 53a moves, namely connecting axle 51a fixes relative to casing 1, that is slip lid 53a moves an idle stroke further, and the distance of such connecting axle 51a movement is minimum, the compact conformation of instrument.The principle of slip lid 53a idle stroke is that slip lid moves a segment distance, but connecting axle can not be driven together relative to chassis movement, that is, in described idle stroke, connecting axle is fixed relative to casing, slip lid is relative to chassis movement, and those skilled in the art can carry out simply being out of shape to replace mutually to the structure of the idle stroke of slip lid in the first embodiment and the 3rd embodiment according to above-mentioned principle, also can realize by other means.

Slip lid 53a arranges rear pushing block 153 relative to the opposite side of the first tooth bar 901, and when operating slip lid 53a and resetting, rear pushing block 153 abuts with the first tooth bar 901, thus slip lid 53a moves drive first tooth bar 901 moves with slip lid 53a.

In present embodiment, the axial length of connecting axle 51a is longer, its head that pushes the work forward enters when storing folder 52a and is supported in storage folder 52a, and connecting axle 51a is supported on the second pinion 905 in its one end when moving backward, the other end supports by arranging bearing rib 59 on slip lid 53a, tilts to prevent connecting axle 51a.In addition, one end circumference connecting axle 51a being arranged magnet 511 is distributed with protruding 5111, the collecting storehouse 521a of corresponding storage folder 52a is provided with locating slot 5211, such connecting axle 51a can smoothly by collecting storehouse 521a, simultaneously locating slot 5211 also can support and connection axle 51a to prevent it from moving time tilt.

Below will elaborate to the quick-replaceable process of working head in third embodiment of the invention.

With reference to shown in Figure 23 and Figure 27, electric drill is in running order, now, what be in operating position in output shaft is screwdriver bit, when needs are replaced with drill bit, operation slip lid 53a moves along shown by arrow M direction, slip lid 53a drives the first tooth bar 901 rectilinear motion by tooth bar pushing block 151, first tooth bar 901 is by the first pinion 903, gear wheel 904, second pinion 905, third pinion 906 and the second tooth bar 902 drive connecting axle 51a to move axially, connecting axle 51a drives screwdriver bit to get back to collecting storehouse 521a by the magnet 511 of its front end, connecting axle 51a is separated with collecting storehouse 521a, now sliding pin 711b is moved straightly to the position shown in Figure 28 along first chute 701 of cam path 72b.

The direction operation slip lid 53a continued along shown by arrow M moves, the resilient force that tooth bar pushing block 151 overcomes Compress Spring 152 under the effect of guiding surface 155 is slided on the first tooth bar 901, first tooth bar 901 is fixed relative to casing, so connecting axle 51a maintains static, the top that two hypotenuses 724 that sliding pin 711b moves to cam path 72b along the hypotenuse 724 of cam path 72b intersect, sliding pin 711b cannot continue mobile thus restriction slip lid 53a continues mobile, and store folder 52a under the drive of sliding pin 711b along the position that the center line moving axially to storage folder 52a perpendicular to output shaft 4a is corresponding with output shaft 4a, namely the distance that folder now moves half is stored, position as shown in Figure 29 and Figure 30.

With reference to Figure 31, mobile slip lid 53a is held to output shaft 4a in direction along shown by arrow N namely, tooth bar pushing block 151 moves relative to the first tooth bar 901, connecting axle 51a still maintains static, sliding pin 711b contacts with guide plate 74 and top 741 along the Y type of guide plate 74 is moved to the side of afterbody 742b, sliding pin 711b drives guide plate 74 to rotate, it is spacing that guide plate 74 is stopped post 75, sliding pin 711b moves under the effect of guide plate 74 in the second chute 702, slip lid 53a moves to the position that rear pushing block 153 contacts with the first tooth bar 901, and storage folder 52a presss from both sides the drill bit corresponding position axial with output shaft 4a of accommodating in another collecting storehouse 521a of 52a along the storage that moves axially to perpendicular to output shaft 4a under the drive of sliding pin 711b, position as shown in figure 32.

The direction operation slip lid 53a continued along shown by arrow N moves, sliding pin 711b moves linearly along the second chute 702, slip lid 53a drives the first tooth bar 901 rectilinear motion by rear pushing block 153, first tooth bar 901 drives connecting axle 51a to move axially by the first pinion 903, gear wheel 904, second pinion 905, third pinion 906 and the second tooth bar 902, and connecting axle 51a enters another collecting storehouse 521a and drives the drill bit in it to enter output shaft 4a.

Repeat above-mentioned steps, just can become screwdriver bit from bit change-over again.Namely the movement locus of sliding pin 711b in cam path 72b moves in circles, namely sliding pin 711b can move to the second chute 702 from the first chute 701, also can get back to the first chute 701 from the second chute 702, thus form the automatic switchover that circulation realizes working head.As can be seen here, when switching between screwdriver function and brill function, only axially need draw-sliding lid 53 along connecting axle 51, just changeable one-tenth wherein a kind of function, draw-sliding lid 53 again, switch to another kind of function, when needing in use procedure to change screwdriver bit or drill bit, only screwdriver bit or drill bit be need remove from output shaft 4, then the screwdriver bit or drill bit that will replace loaded from output shaft 4.In addition, the working head that prestores also can store folder by installing or load the mode of working head from output shaft, first loads in screwdriver bit or drill bit, draws-sliding lid 53, is accommodated for one in screwdriver bit or drill bit; Load in screwdriver bit or drill bit again another, draw-sliding lid 53, another in screwdriver bit or drill bit is then exposed output shaft 4 by of accommodating in screwdriver bit or drill bit and is in operating position.

The operation that foregoing working head switches, no matter be manual or automatic switching mode, manual operation slip lid is all needed to move back and forth, but between slip lid 53 and casing 1 or between connecting axle 51 and casing 1, flexible member is set, only need operate slip lid to move to the direction of motor, then manually or by slip lid automatic switching control equipment is driven to select screwdriver bit or drill bit, release slip lid, that is slip lid also can be resetted by elastic force, and such is more convenient to operate.

The above-mentioned definition to each element is not limited in the various concrete structure or shape mentioned in embodiment, and those of ordinary skill in the art can replace it with knowing simply.As motor can carry out alternative motor with gasoline engine or diesel engine etc.; Slip lid is for driving connecting axle or drived control mechanism, and its version can have multiple as pull bar, end cap etc.; In addition, in above-mentioned embodiment, between connecting axle and storing presss from both sides to move to axial also can be that connecting axle is fixed, and store folder and can either axially-movable also can rotate, and connecting axle also can be coaxially arrange with motor shaft; Moreover being all the mode that operation slip lid drives the motion of working head supporting mechanism in above-mentioned automatic switching control equipment, also can be cephalomotor mode of operation slip lid driving work etc.In addition, have no special requirements to its structure, visual different interior carrys out corresponding change configuration, can increase new element, also can reduce unnecessary element.

Claims (37)

1. a hand held electric tool, comprising:

Casing;

Motor, is arranged in casing, and outputting rotary power;

Output shaft, has the accepting hole of the accommodation working head axially arranged;

Transmission mechanism, is arranged between motor and output shaft and also the rotary power that motor exports can be passed to output shaft;

Working head supporting mechanism, is arranged in casing, and described working head supporting mechanism has several receiving spaces be set up in parallel for support works head;

Connecting axle, is arranged in casing and also working head can be made to be in the operating position being positioned at accepting hole or the collecting position being positioned at working head supporting mechanism;

It is characterized in that: described working head comprises at least one screwdriver bit and at least one drill bit, described hand held electric tool also comprises operating mechanism, the selectable driving connecting axle of described operating mechanism makes that drill bit is in collecting position and screwdriver bit is in operating position, or make that screwdriver bit is in collecting position and drill bit is in operating position, described operating mechanism comprises the operating parts that controls the motion of described connecting axle and in response to the motion of described operating parts and the automatic switching control equipment regulated the position of working head supporting mechanism, described connecting axle motion makes in described screwdriver bit or drill bit one to be in collecting position, described working head supporting mechanism at the move under influence of automatic switching control equipment to another in described screwdriver bit or drill bit and the axially corresponding position of described output shaft.

2. hand held electric tool as claimed in claim 1, is characterized in that: the diameter of described accepting hole is between 5 millimeters to 15 millimeters.

3. hand held electric tool as claimed in claim 1, is characterized in that: described collecting position is provided with two, is set up in parallel along the direction perpendicular to output shaft axis.

4. hand held electric tool as claimed in claim 1, is characterized in that: described collecting position is greater than two, is set up in parallel around the axis being parallel to output shaft axis.

5. hand held electric tool as claimed in claim 1, is characterized in that: on described casing, the position of corresponding described working head supporting mechanism is provided with opened portion, and described working head supporting mechanism can remove from described casing through described opened portion.

6. hand held electric tool as claimed in claim 1, is characterized in that: on described casing, the position of corresponding described working head supporting mechanism is provided with opened portion, and described working head supporting mechanism exposes from described opened portion at least partly.

7. hand held electric tool as claimed in claim 1, is characterized in that: described connecting axle axially-movable.

8. hand held electric tool as claimed in claim 1, it is characterized in that: one end of described connecting axle is provided with magnet, described connecting axle makes working head get back to collecting position by magnet.

9. hand held electric tool as claimed in claim 1, is characterized in that: described operating parts exposes casing at least partly.

10. hand held electric tool as claimed in claim 9, is characterized in that: described operating parts and described connecting axle are wholely set.

11. hand held electric tools as claimed in claim 9, it is characterized in that: be provided with reseting elastic element between described operating parts and casing, described operating parts has the trend controlling described connecting axle and described working head is moved to operating position under the effect of reseting elastic element.

12. hand held electric tools as claimed in claim 1, it is characterized in that: be provided with reseting elastic element between described connecting axle and casing, described connecting axle has the trend that described working head is moved to operating position under the effect of reseting elastic element.

13. hand held electric tools as claimed in claim 1, it is characterized in that: described hand held electric tool also comprises the position-limit mechanism be arranged between casing and connecting axle, described connecting axle makes one of them working head be in operating position, described position-limit mechanism restriction connecting axle moves to the direction away from described working head, and the exercisable releasing position-limit mechanism of described operating parts is to the restriction of connecting axle axially-movable.

14. hand held electric tools as claimed in claim 1, it is characterized in that: described hand held electric tool also comprises the position-limit mechanism be arranged between casing and connecting axle and the operating knob coordinated with position-limit mechanism, described connecting axle makes one of them working head be in operating position, described position-limit mechanism restriction connecting axle moves to the direction away from described working head, and the exercisable releasing position-limit mechanism of described operating knob is to the restriction of connecting axle axially-movable.

15. hand held electric tools as claimed in claim 1, is characterized in that: at least one screwdriver bit described is identical with the handle shapes of at least one drill bit.

16. hand held electric tools as claimed in claim 15, is characterized in that: the shank cross section of at least one screwdriver bit described or at least one drill bit is polygon.

17. hand held electric tools as claimed in claim 16, is characterized in that: the shank cross section of at least one screwdriver bit described or at least one drill bit is regular hexagon.

18. hand held electric tools as claimed in claim 1, is characterized in that: described output shaft has the rear end and relative front end of closing on working head supporting mechanism, and described working head can exercisablely remove from operating position from described front end.

19. hand held electric tools as claimed in claim 1, is characterized in that: the middle part of described working head supporting mechanism is provided with magnet along being parallel to working head length direction.

20. hand held electric tools as claimed in claim 1, is characterized in that: described operating parts is lid, described operating parts along the axially-movable of described connecting axle to cover or to expose the part of described working head supporting mechanism or working head.

21. hand held electric tools as claimed in claim 1, it is characterized in that: described operating mechanism comprises the movement conversion mechanism be connected between operating parts and working head supporting mechanism, described movement conversion mechanism is used for the rotary motion linear movement of described operating parts being converted to described working head supporting mechanism.

22. hand held electric tools as claimed in claim 1, it is characterized in that: described operating mechanism comprises the movement conversion mechanism be connected between operating parts and working head supporting mechanism, described movement conversion mechanism is used for the linear movement linear movement of described operating parts being converted to described working head supporting mechanism.

23. hand held electric tools as claimed in claim 1, is characterized in that: described working head supporting mechanism can move along the direction perpendicular to described connecting axle axis.

24. hand held electric tools as claimed in claim 1, is characterized in that: described working head supporting mechanism can rotate round the axis being parallel to described connecting axle axis.

The method of operating of 25. 1 kinds of hand held electric tools as claimed in claim 1, comprises the following steps: 1), operation operating parts drives connecting axle to make in screwdriver bit and drill bit one to be in collecting position and drive described working head supporting mechanism at the move under influence of automatic switching control equipment to the position corresponding with described output shaft axis of another in described screwdriver bit or drill bit; 2) another, operating that operating parts drives connecting axle to make in screwdriver bit and drill bit is in operating position.

The method of operating of 26. hand held electric tools as claimed in claim 25, is characterized in that: in described step 1) before, also comprise the step loading working head from described output shaft.

The method of operating of 27. hand held electric tools as claimed in claim 26, it is characterized in that: the step loading working head from described output shaft comprises sub-step, first another in screwdriver bit or drill bit is filled into output shaft, operation operating parts drive connecting axle to make in screwdriver bit or drill bit another be in collecting position; In screwdriver bit or drill bit one is filled into output shaft.

The method of operating of 28. hand held electric tools as claimed in claim 25, is characterized in that: described step 1) before, the working head supporting mechanism that at least one screwdriver bit and at least one drill bit are housed is loaded casing.

The method of operating of 29. hand held electric tools as claimed in claim 25, it is characterized in that: described step 2) after, remove another screwdriver bit and drill bit from described output shaft, then in the screwdriver bit that will replace or drill bit one is filled into output shaft.

The method of operating of 30. hand held electric tools as claimed in claim 25, is characterized in that: described step 2) after, operation operating parts drive connecting axle to make in screwdriver bit and drill bit another be in collecting position; Operation operating mechanism drives connecting axle to make in screwdriver bit and drill bit one to be in operating position.

The method of operating of 31. hand held electric tools as claimed in claim 25, is characterized in that: described step 1) in draw described operating parts to drive connecting axle to make in screwdriver bit and drill bit one to be in collecting position along direction from output shaft to motor.

The method of operating of 32. hand held electric tools as claimed in claim 31, is characterized in that: described step 2) in push away along direction from motor to output shaft that described operating parts drives connecting axle to make in screwdriver bit and drill bit another be in operating position.

The method of operating of 33. hand held electric tools as claimed in claim 31, it is characterized in that: between described operating parts and casing or between connecting axle and casing, be provided with reseting elastic element, described step 2) in the described operating parts of release, described connecting axle make in screwdriver bit and drill bit under the effect of reseting elastic element another be in operating position.

The method of operating of 34. hand held electric tools as claimed in claim 31, it is characterized in that: described hand held electric tool also comprises the position-limit mechanism be arranged between casing and connecting axle, described connecting axle makes one of them working head be in operating position, described position-limit mechanism restriction connecting axle moves to the direction away from described working head, described step 1) before, draw described operating parts to remove the restriction of position-limit mechanism to connecting axle axially-movable along the direction from output shaft to motor.

The method of operating of 35. hand held electric tools as claimed in claim 31, is characterized in that: draw along the direction from output shaft to motor and/or push away described operating parts to drive described working head supporting mechanism along the direction from motor to output shaft.

The method of operating of 36. hand held electric tools as claimed in claim 31, it is characterized in that: described operating parts is lid and can covers a part for described working head supporting mechanism, described step 1) after and step 2) before, draw described operating parts to expose a part for described working head supporting mechanism along direction from output shaft to motor, stir described working head supporting mechanism and make another in described screwdriver bit or drill bit corresponding with described output shaft axis.

The method of operating of 37. hand held electric tools as claimed in claim 25, it is characterized in that: described hand held electric tool also comprises the position-limit mechanism be arranged between casing and connecting axle, described operating mechanism comprises the operating knob coordinated with position-limit mechanism, described connecting axle makes one of them working head be in operating position, described position-limit mechanism restriction connecting axle moves to the direction away from described working head, described step 1) before, along perpendicular to work cephalomotor direction push button to remove the restriction of position-limit mechanism to connecting axle axially-movable.