CN206357172U - A kind of multiple-head type electric tool - Google Patents

Abstract

The utility model discloses a kind of electric tool of multiple-head type, belong to field of power tools, including hand-held body, motor is provided with hand-held set body, the motor is connected with output shaft, it is characterised in that, the output shaft overhangs the front end of the hand-held body, the week side of the output shaft, which is provided with external screw thread, the output shaft, is threaded with replaceable working machine head, and the working machine head is reciprocating saw head or drill chuck.The utility model has the advantage of the wildcard degree of increase part, cost is reduced.

Description

A kind of multiple-head type electric tool

【Technical field】

The utility model is related to a kind of multiple-head type electric tool, belongs to field of power tools.

【Background technology】

At present, electric tool due to it is lightweight, easy to use the features such as obtained extensively in daily life, processing and manufacturing field General application, existing electric tool generally includes to include being provided with motor, the motor in hand-held body, hand-held set body It is connected with output shaft, output shaft and connects working machine head.

Different according to operation object, people are in use, several often according to a variety of electric tools are bought the need for difference Plant electric tool to add up, accumulation price is higher, carry also harder.Such issues that on existing market in order to solve, with The electric tool for occurring in that multiple-head type, though the electric tool of this kind of multiple-head type can a machine match somebody with somebody bull, but matched somebody with somebody interface Respective special purpose interface is substantially, versatility is poor.

【Utility model content】

Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art and provide a kind of multiple-head type electricity Power driven tools, increase the wildcard degree of part, reduce cost.

Above-mentioned technical problem is solved, the utility model is adopted the following technical scheme that：

Motor is provided with a kind of multiple-head type electric tool, including hand-held body, hand-held set body, the motor connects It is connected to output shaft, it is characterised in that the output shaft overhangs the front end of the hand-held body, the week side of the output shaft is set Have and replaceable working machine head is threaded with external screw thread, the output shaft, the working machine head is reciprocating saw head or brill Chuck.

Using the beneficial effects of the utility model：

One hand-held two head of body wildcard, for user, can more be saved without the hand-held body of repeat buying Money, and for production firm, hand-held body is a general part, can in high volume be produced, and it is traditional drill chuck, past Multiple saw is first-class all respectively to that should have different hand-held bodies, causes that during production production will be corresponded, it is impossible to which high-volume is raw Production, when order changes, easily causes parts to overstock, and hand-held body is arranged to after general part, can courageously carry out Batch production, it may not be necessary to excessively limited by order, for the production of enterprise, significantly reduce production pressure.

In addition, be that the mode being connected through a screw thread is connected in the utility model, between working machine head and hand-held body, it is first First, the connected mode of screw thread is simple in construction, and connective stability is good, and the mode generalization degree of threaded connection is high, even Two working machine heads are not resided on the hand-held body in the utility model in the utility model, hand-held body, working machine head It can be sold separately as parts, carrying out matching with other accessories on the market is connected.Secondly because output shaft is inherently Be by motor-driven rotation, so working machine head with hand-held body when being connected, it is defeated using the characteristic of output shaft own rotation Shaft can realize the mating connection with working machine head automatically, when output shaft is inverted, can realize automatically and working machine when rotating The dismounting of head, it is very convenient.

Preferably, the working machine head is reciprocating saw head, reciprocating saw head is provided with the first centre bore, described first Centre bore is threadedly coupled with the week side of output shaft.

Preferably, being provided with Oscillating lever bearing component in the reciprocating saw head, the motor passes through Oscillating lever bearing group Part driving cast-cutting saw slice is moved back and forth, and the Oscillating lever bearing component includes the bearing inner-core that is connected with the output shaft, and described the One centre bore is located on the bearing inner-core.

Set preferably, the front end face of the hand-held body is provided with positioning round table, the rear end face of the reciprocating saw head There are the positioning circular groove matched with the positioning round table, the axis of the output shaft and the axis coaxle of positioning round table, the positioning The side wall of circular groove is provided with the side fastening part for the radially fixed positioning round table.

Preferably, the side fastening part is trip bolt, the inner side end of the trip bolt is provided with annular protrusion.

Set preferably, the front end face of the hand-held body is provided with dial, the rear end face of the reciprocating saw head Have with the dial to mutatis mutandis alignment target.

Preferably, provided with the reciprocating lever being reciprocally moveable, the reciprocating lever and Oscillating lever bearing in the reciprocating saw head Component is connected, and the reciprocating lever, which is provided with lock hole, the reciprocating saw head, is provided with securing rod, and securing rod inserts the locking Hole is with the locked reciprocating lever.

Preferably, being provided with the securing rod perforation for being used to install the securing rod, the locking in the reciprocating saw head The inner of bar, which is provided with, limits its spacing ring for departing from securing rod perforation, and the outer end of the securing rod is provided with button ring, the button Button return spring is provided between ring and securing rod perforation.

Preferably, the working machine head is drill chuck, be provided with the second centre bore in the drill chuck, the second centre bore with The week side of output shaft is threadedly coupled.

Preferably, the end face indent of the output shaft has endoporus, the hole wall of the endoporus, which is provided with internal thread, endoporus, twists There is the end face screw drill chuck being fastened on output shaft, the external screw thread of the internal thread and output shaft is oppositely oriented.

These features and advantage of the present utility model will be detailed in following embodiment, accompanying drawing exposure.

【Brief description of the drawings】

The utility model is described further below in conjunction with the accompanying drawings：

Fig. 1 is to be mounted with the structural representation after different working machine heads with an electric tool；

Fig. 2 is electric tool and drill chuck, the connection diagram of reciprocating saw head；

Fig. 3 is the exploded perspective view of multiple-head type electric tool；

Fig. 4 is the section view schematic three dimensional views of multiple-head type electric tool；

Fig. 5 is the cross-sectional plane schematic diagram of multiple-head type electric tool；

Fig. 6 be Fig. 5 in A-A to cross section schematic diagram；

Fig. 7 is the cross section schematic diagram of B-B direction in Fig. 5；

Fig. 8 is the structural representation of Oscillating lever bearing component；

Fig. 9 is the structural representation for connecing lid；

Figure 10 is the structural representation of side fastening part.

【Embodiment】

The technical scheme of the utility model embodiment is explained with reference to the accompanying drawing of the utility model embodiment and Illustrate, but following embodiments are only preferred embodiment of the present utility model, and it is not all.Based on the embodiment in embodiment, Those skilled in the art obtain other embodiment on the premise of creative work is not made, and belong to of the present utility model Protection domain.

As shown in Figure 1 to Figure 2, the present embodiment is a kind of multiple-head type electric tool, including hand-held body 1, is located at hand-held set Motor in body 1, the motor is connected with output shaft 10, and the output shaft 10 overhangs the hand-held body 1 Front end, it is on clockwise direction, the output shaft 10 that the week side of the output shaft 10, which is provided with external screw thread in external screw thread, the present embodiment, Replaceable working machine head is threaded with, the working machine head is reciprocating saw head 2 or drill chuck 3.One hand-held body 1 leads to With two heads, for user, can more it be saved money without the hand-held body 1 of repeat buying, and for production firm, hand It is a general part to hold body 1, can in high volume be produced, and traditional drill chuck 3, reciprocating saw head 2 are all corresponded to respectively There are different hand-held bodies, cause that during production production will be corresponded, it is impossible to produce in enormous quantities, when order changes, pole Easily cause parts to overstock, and hand-held body 1 is arranged to after general part, can courageously be produced in batches, it may not be necessary to mistake Limited more by order, for correspondence production, significantly reduce production pressure.

It is that the mode being connected through a screw thread is connected in the present embodiment, between working machine head and hand-held body 1, first, screw thread Connected mode it is simple in construction, connective stability is good, secondly because output shaft 10 is inherently by motor-driven rotation, so work Make head with hand-held body 1 when being connected, using the characteristic of the own rotation of output shaft 10, output shaft 10, can be certainly when rotating The dynamic mating connection realized with working machine head, when output shaft 10 is inverted, the dismounting with working machine head can be realized automatically, very just Just.

As shown in Figure 2, it is the specific connected mode of hand-held body 1 and two kind of head：

When working machine head is drill chuck 3, the drill chuck 3 is provided with the second centre bore 31, second along its axial direction The hole wall in heart hole 31 is provided with screw thread be engaged with the matching of the external screw thread of output shaft 10, during installation, week of output shaft 10 sideways with Second centre bore 31 is threadedly coupled.

Because drill chuck 3 is influenceed very big by torsion in the course of the work, in order to prevent drill chuck 3 from making by reverse torsion Depart under from output shaft 10, the present embodiment is further reinforced to drill chuck 3, and the end face indent of the output shaft 10 has Endoporus 101, the wall of endoporus 101 is provided with internal thread, is screwed with end face screw 32 on endoporus 101, when output shaft 10 week side with After the connection of second centre bore 31, the other end of end face screw 32 from the second centre bore 31 is penetrated, and is screwed into the interior of output shaft 10 In hole 101, wherein the external thread rotary of the internal thread of the endoporus 101 and output shaft 10 is on the contrary, the i.e. side of screwing of end face screw 32 To being left-handed, i.e. drill chuck 3 back-outs the tightening direction that direction is end face screw 32, so when drill chuck 3 is back-outed direction Torsion when, end face screw 32 is more tightened, so as to realize the effect of self-locking.

When working machine head is reciprocating saw head 2, reciprocating saw head 2 is provided with the first centre bore 41, first center Hole 41 is threadedly coupled with the week side of output shaft 10, is fastened as further, in the present embodiment, the front end of the hand-held body 1 Face is provided with positioning round table 12, the axis of the output shaft 10 and the axis coaxle of positioning round table 12, and output shaft 10 is stretched out in and determined The end face of circle of position platform 12, the rear end face of the reciprocating saw head 2 is provided with the positioning circular groove 51 matched with the positioning round table 12, During installation, positioning round table 12 is fitted in positioning circular groove 51, while output shaft 10 is then screwed in the first centre bore 41.

The side wall of the positioning circular groove 51 is provided with the side fastening part 21 for the radially fixed positioning round table 12, tool For body, the reciprocating saw head 2 in the present embodiment includes handpiece case, and the wall of the positioning circular groove 51 is provided with side lock tieholen 52, handpiece case includes side fastening part 21 in upper shell 22, lower house 23, soft rubber sleeve 24, the present embodiment and is in the present embodiment The trip bolt in side lock tieholen 52 is connected to, when trip bolt is tightened, the extruding force of radial direction can be produced to positioning round table 12, So as to reach the effect of fastening.

As the preferred of the present embodiment, the inner side end of trip bolt towards positioning round table 12 is provided with annular protrusion 211, The centre of annular protrusion 211 is hollow, such structure design, can be increased between trip bolt and all sides of positioning round table 12 Contact area, frictional force is bigger, and fastening effect is more preferable.In addition, the side of the outboard end of trip bolt is provided with hexagon ring 212, because many screws of reciprocating saw head 2 are all hex screws, the six of column will be used when dismounting these hex screws Angle spanner, therefore hexagon ring 212 is set on trip bolt, the die nut of column can equally pass through the hexagon ring 212, be formed The effect of a similar handle, fastening effect is carried out to trip bolt, and the structure of trip bolt for details, reference can be made to Figure 10.

Further, since reciprocating saw is in real work, the angle of cutting can may be there are certain requirements, adjusted for convenience The angle, the front end face of the hand-held body 1 is provided with dial, the rear end face of the reciprocating saw head 2 be provided with it is described Dial is to mutatis mutandis alignment target 251.During adjustment, first trip bolt can be come loose, reciprocating saw head can be now rotated manually 2, in rotation process, alignment target 251 can correspond to the scale on dial, and after angle on target is adjusted to, trip bolt is twisted Tightly, so as to realize that angle is fixed, when so even vertically hold hand-held body 1, it can also realize and the oblique of target object is cut Cut.

Such as Fig. 3 to Fig. 7 is the specific expansion to the internal structure of reciprocating saw head 2, describes, defines in figure 3 for convenience Front and rear direction, the front and rear direction in describing below is the front and rear direction defined in Parameter Map 3：

The general structure of reciprocating saw head 2, including handpiece case, be located in handpiece case be used for connect cast-cutting saw slice 26 The Oscillating lever bearing component 4 of reciprocating lever 6, drive connection between the reciprocating lever 6 and output shaft 10, Oscillating lever bearing component 4 is machine A kind of conventional mechanical bearing in tool field, its main function be by convert rotational motion into axial direction reciprocating motion, It is that, by the rotation of output shaft 10 to drive the linear running of reciprocating lever 6, and finally driving cast-cutting saw slice 26 is back and forth cut in the present embodiment Cut object.

Oscillating lever bearing component 4 includes bearing inner-core 42, bearing outer ring 43 and is set on bearing inner-core 42 in the present embodiment Swing rod external member, bearing inner-core 42 is provided with the first centre bore 41, and all flank threads of the first centre bore 41 and output shaft 10 connect Connect, bearing outer ring 43 is also to be sleeved on bearing inner-core 42, bearing outer ring 43 is that circumferential plane is rotated, and swing rod external member is by axle The swing that the slant rail on 42 weeks sides of inner core rotates and produces axial direction is held, the swing rod external member includes annulus 44 With swing rod post 45, annulus 44 is by ball sleeve on the slant rail of bearing inner-core 42, and swing rod post 45 is by the footpath of annulus 44 The thin cylinder formed to extension, the schematic three dimensional views of Oscillating lever bearing component 4 can be found in Fig. 8.

The end of swing rod post 45 is fitted with the roller 61 of column, and the sidepiece of roller 61 is provided with the plug-in opening 611 of insertion, plug-in opening 611 be that gap coordinates with swing rod post 45, and two ends of roller 61 cross win and are connected with two roller pins 612, reciprocating lever 6 Rearward end be provided with roller groove 62, the left side and right side of roller groove 62 are provided with roller pin hole, and the roller pin 612 of the roller 61 is pacified In the roller pin hole, whole roller 61 is being contained in roller groove 62, during swing rod 45 swing of post, can pass through roller Pin 612 drives reciprocating lever 6 to move forward and backward, and because swing rod post 45 is swung with certain angle in swing process, therefore swings Also a certain degree of rotation is produced in journey between roller pin 612 and roller pin hole, to reduce interference.

The main force part of whole Oscillating lever bearing component 4 concentrates on the top of the end, i.e. swing rod external member of swing rod post 45, And stress is smaller at the annulus 44 of the position away from the end of swing rod post 45, therefore swing rod external member is in swing process, unbalance stress It is even, cause to vibrate in swing process larger, stability is not good enough, the balance of external member is swung in the present embodiment in order to increase, in ring It is connected with for reducing the stabilizing member vibrated in swing rod external member swing process, is allowed away from the end side of swing rod post 45 in shape portion 44 Annulus 44 is also subjected to a part of power, and to play a part of, balance is whole to swing external member, finally plays reduction Oscillating lever bearing component 4 Effect of vibration effect, effectively increase the service life of reciprocating saw head 2.

And stabilizing member is made up of two parts in the present embodiment, a portion is the balance being located on the annulus 44 Block 441, the balance weight 441 and the integrative-structure of annulus 44 are fixed on the annulus 44.In the present embodiment Balance weight 441 is, from the extending radially outward weight of annulus 44, the stress degree between two ends to be balanced with weight, from And reduce the vibration that swing rod external member is caused because of two ends unbalance stress.

Another part of stabilizing member, then be the back-moving spring being located between the end face of annulus 44 and handpiece case.This implementation Back-moving spring has two in example, is respectively preceding spring 46 and rear spring 47, the preceding spring 46 and rear spring 47 are respectively provided at ring The not homonymy in shape portion 44, back-moving spring plays two effects in the present embodiment：First, being to play flat as balance weight 441 The effect at the swing rod external member that weighs two ends, reduces swing rod sleeve vibrations；On the other hand, back-moving spring possesses storage when by compression or stretching The effect of energy and can be released, when annulus 44 swings to two extreme positions, back-moving spring can provide restoring force for annulus 44, So as to provide reciprocal power to reciprocating lever 6, output shaft 10 can be reduced to a certain extent to oscillation bearing work done.

The specific mounting structure of back-moving spring, Oscillating lever bearing component 4：

Internal box 7 is provided with the present embodiment in handpiece case, the top of internal box 7 and rearward end are opening, swing rod Bearing assembly 4 is arranged in internal box 7, and the front end of wherein bearing inner-core 42 is connected with rotating shaft 421, rotating shaft 421 and bearing inner-core Small bearing 422 is provided between 42, the front side wall of internal box 7 is provided with the shaft hole 71 for being used for installing the rotating shaft 421, internal box 7 inside are provided with circular arc internal face 72, and the axis of circular arc internal face 72 is in same straight line, internal box 7 with the axis of shaft hole 71 Rearward end be provided with and connect lid 5, the front end face for connecing lid 5 is extended with towards the direction of internal box 7 and connects lid inner ring wall 53, connects lid inner ring The outer shape of wall 53 is matched with circular arc internal face 72, and is connect the axis of the axis and circular arc internal face 72 of lid inner ring wall 53 and be in Same axis, connects the inner hollow of lid inner ring wall 53 formation bearing groove 531, and the bearing outer ring 43 is inlaid in bearing groove 531.

The rear end face for connecing lid 5 is extended with and connects lid collar wall 54, connects the above-mentioned positioning circular groove 51 of the inner hollow of lid collar wall 54, Four edges for connecing lid 5 are provided with installation through-hole, and the rear end of handpiece case is provided with rear end cap 25, and screw sequentially passes through rear end cap 25th, connect lid 5, and most at last rear end cap 25, connect lid 5 and be fixed on the rear end face of internal box 7, the concrete structure for connecing lid 5 can be found in Fig. 9.

After being so completed, there is support the front-end and back-end of Oscillating lever bearing component, and there is the front side wall branch of internal box 7 front end Support, rear end connects lid 5 and supported, and more preferably, rotation process beating degree is small for two ends support rear stability, and in the present embodiment, it is overall After installation, lid inner ring wall 53, shaft hole 71, the axis of circular arc internal face 72 of connecing is in same straight line, and axiality is high, swings Vibrated in bearing assembly operation process very small.

The assembling of back-moving spring：The bottom of the end face of the annulus 44 is provided with the first spring groove 442, the first spring groove 442 have two, and the shape of the first spring groove 442 is in loudspeaker in the front end face and rear end face of annulus 44, the present embodiment respectively It is provided with mouth shape, first spring groove 442 on the ball bumps 443 of position reset spring inner ring, the front side wall of internal box 7 Provided with spring retention posts 73, described one end of preceding spring 46 is set on spring retention posts 73, and the other end is positioned at ball bumps It is wallowing motion when being swung due to annulus 44 on 443, the purpose for setting bell mouth shape is annulus 44 in swing process In, the probability that the first spring groove 442 is interfered with preceding spring 46 can be reduced.Certainly, in the present embodiment on the front side wall of internal box 7 Spring retention posts 73, second spring groove can also be changed into, the front end of preceding spring 46 can be contained in second spring groove.

For rear spring 47, the front end face for connecing lid 5 is provided with the 3rd spring groove, and one end of rear spring 47 is inlaid in the In three spring grooves 55, the other end is inlaid in the first spring groove 442, and the 3rd spring groove 55 is replaceable into spring retention posts.

It should be noted that be to be resetted using dual spring in the present embodiment, those skilled in the art also will be appreciated that, In other embodiment, it would however also be possible to employ Single spring is resetted, this embodiment also falls into protection model of the present utility model Enclose.

The top of internal box 7 is provided with interior case lid 74, and the reciprocating lever 6 is arranged between interior case lid 74 and internal box 7, separately Outside, in order to reduce frictional force of the reciprocating lever 6 in motion process, upper friction sleeve is provided between the top of reciprocating lever 6 and interior case lid 74 63, reciprocating lever backing plate 64, upper friction sleeve 63 and reciprocating lever backing plate 64 are provided between the bottom of reciprocating lever 6 and the top of internal box 7 It is made of wear-resistant material.During assembling, interior case lid 74, reciprocating lever backing plate 64 are fixed on internal box 7 together simultaneously with screw Top, while internal box 7 is fixed between upper shell 22 and lower house 23, after upper shell 22 and lower house 23 are completed, In upper shell 22 and the outer wrap soft rubber sleeve 24 of lower house 23.

When reciprocating saw head 2 is installed to hand-held body 1, positioning circular groove 51 is first directed at positioning round table 12, after alignment, due to Positioning round table 12 is coaxial with output shaft 10, then output shaft 10 is also accordingly aligned with the first centre bore 41 on bearing inner-core 42, Start the switch on hand-held body 1, start output shaft 10 and rotate, by the external screw thread on 10 weeks sides of output shaft, output shaft 10 It is automatically mounted into the first centre bore 41, after installation, user can be finely adjusted according to the cutting needs of oneself, setting angle, After having adjusted, locked using side fastening part 21.

When reciprocating saw head 2 is dismantled, under normal circumstances, it is only necessary to unclamp side fastening part 21, then by handset body 1 On reversal switch, with regard to output shaft 10 can be allowed to invert, when output shaft 10 is inverted, automatic can be screwed out out of first centre bore 41.So And in many cases, reciprocating saw after cutting work is carried out, the first centre bore 41 in bearing inner-core 42 often with output shaft 10 are killed, and when output shaft 10 is inverted, bearing inner-core 42 also can be inverted accordingly, and output shaft 10 can not be from first Screwed out in centre bore 41, the occurrence of in order to prevent this kind of, locking device is devised to reciprocating lever 6 in the present embodiment.

Specifically, described internal box 7 is provided with activity chain in securing rod perforation 75, securing rod perforation 75 and is connected to locking Securing rod 8 is located at the bottom of reciprocating lever 6 in bar 8, the present embodiment, and the bottom of reciprocating lever 6 is provided with lock hole 65, the top of securing rod 8 Portion is provided with spacing ring 81, and the bottom radial direction reaming of the securing rod perforation 75 forms button slot 751, the bottom of the securing rod 8 Provided with button ring 82, button ring 82 and the releasable connection of securing rod 8, button ring 82 are contained in button slot 751, and button ring 82 with Button return spring 83 is provided between the roof of button slot 751.

When disassembly is desired, user can be with button press ring 82, and button return spring 83 is compressed, so that securing rod 8 top is inserted and locking is completed in the lock hole 65, can not be realized after reciprocating lever 6 is locked it is movable, so as to just limit The swing of swing rod post 45, after swing rod post 45 is limited, bearing inner-core 42 is also rotated by limitation, when now output shaft 10 is inverted, Output shaft 10 is just automatic to be screwed out from bearing inner-core 42, is followed situation about inverting without bearing inner-core 42, is worked as output shaft After 10 screw out, release button ring 82, button ring 82 can self-return in the presence of button return spring 83.

It is described above, embodiment only of the present utility model, but protection domain of the present utility model do not limit to In this, it is familiar with the those skilled in the art and should be understood that the utility model includes but is not limited to accompanying drawing and above specific embodiment party Content described in formula.Any modification without departing from function and structure principle of the present utility model is intended to be included in claims Scope in.

Claims (10)

1. motor is provided with a kind of multiple-head type electric tool, including hand-held body, hand-held set body, the motor connection There is output shaft, it is characterised in that the output shaft overhangs the front end of the hand-held body, the week side of the output shaft is provided with Replaceable working machine head is threaded with external screw thread, the output shaft, the working machine head is reciprocating saw head or drill point Head.

2. multiple-head type electric tool as claimed in claim 1, it is characterised in that the working machine head is reciprocating saw head, past Multiple saw machine head is provided with the first centre bore, and first centre bore is threadedly coupled with the week side of output shaft.

3. multiple-head type electric tool as claimed in claim 2, it is characterised in that Oscillating lever bearing is provided with the reciprocating saw head Component, the motor by Oscillating lever bearing Component driver cast-cutting saw slice move back and forth, the Oscillating lever bearing component include with The bearing inner-core of the output shaft connection, first centre bore is located on the bearing inner-core.

4. multiple-head type electric tool as claimed in claim 3, it is characterised in that the front end face of the hand-held body is provided with positioning Round platform, the rear end face of the reciprocating saw head is provided with the positioning circular groove matched with the positioning round table, the axle of the output shaft The axis coaxle of line and positioning round table, the side wall of the positioning circular groove is provided with the side for the radially fixed positioning round table Fastener.

5. multiple-head type electric tool as claimed in claim 4, it is characterised in that the side fastening part is trip bolt, institute The inner side end for stating trip bolt is provided with annular protrusion.

6. multiple-head type electric tool as claimed in claim 4, it is characterised in that the front end face of the hand-held body is provided with quarter Scale, the rear end face of the reciprocating saw head is provided with the dial to mutatis mutandis alignment target.

7. multiple-head type electric tool as claimed in claim 3, it is characterised in that be provided with and reciprocally move in the reciprocating saw head Dynamic reciprocating lever, the reciprocating lever is connected with Oscillating lever bearing component, and the reciprocating lever is provided with lock hole, the reciprocating saw head Interior to be provided with securing rod, securing rod inserts the lock hole with the locked reciprocating lever.

8. multiple-head type electric tool as claimed in claim 7, it is characterised in that being provided with the reciprocating saw head is used to install The securing rod perforation of the securing rod, the inner of the securing rod, which is provided with, limits its spacing ring for departing from securing rod perforation, described The outer end of securing rod is provided with button ring, and button return spring is provided between button ring and the securing rod perforation.

9. multiple-head type electric tool as claimed in claim 1, it is characterised in that the working machine head is drill chuck, the brill The second centre bore is provided with chuck, the second centre bore is threadedly coupled with the week side of output shaft.

10. multiple-head type electric tool as claimed in claim 9, it is characterised in that the end face indent of the output shaft has endoporus, The hole wall of the endoporus is provided with internal thread, endoporus and is screwed with the end face screw being fastened to the drill chuck on output shaft, described The external screw thread of internal thread and output shaft is oppositely oriented.