CN207858761U - Electric tool - Google Patents

Abstract

A kind of electric tool, it at least has the function of electric drill function and impact wrench, handle including shell and with the angled arrangement of the shell, the shell definition has longitudinal axis, fixation contains power plant module in housing rear end position, the switching mechanism for being provided with power output system in the front position of shell and coordinating with power output system, the selectable setting electric tool of switching mechanism is in electric drill function or impact wrench function, pass through the design of switching mechanism, electronic work is realized between electric drill function and impact wrench function and stablizes switching, the switching mechanism has structure and processing procedure simple simultaneously, low production cost, function-stable, the advantages that easy to operate.

Description

Electric tool

Technical field

The utility model is related to a kind of electric tools, especially a kind of to have multiple functions and switch between multiple functions Electric tool.

Background technology

In existing drill gun type electric tool, electric drill, electric screwdriver, impact drill, impact wrench etc. are generally included.

Wherein, impact wrench is mainly used for fastening bolt.It is actively rushed with active impact block, passive impact block etc. It hitting block and driving is rotated by the output shaft of gear reduction, passive impact block can be engaged with active impact block and is driven in rotation, Passive impact block is located on working shaft and rotates driving working shaft, wherein load of the active impact block suffered by working shaft increases It is big to being selectively disengaged from passive impact block when particular value, and then under the rotation of output shaft driving again with passively impact Block engages again, to impose intermittent impact to working shaft in a rotational direction.

Electric drill is for drilling on workpiece, and in operation process, auger spindle constantly rotates.In general, making User needs to carry out different types of operation, such as the turn of the screw, stubborn bolt, drilling when carrying out operation.It is thus desirable to user Prepare a variety of different types of electric tools, also constantly more to bring will bother if being operated very much.

Currently, also having in the prior art by two in electric drill as described above, electric screwdriver, impact drill, impact wrench etc. A or more products being integrated on an electric tool, and the phase between each function is realized by complicated switching mechanism Mutually switching, complicated switching mechanism are not only unfavorable for user's operation, and corresponding manufacturing cost can also increase, there is also simultaneously The problems such as each function module output stability is poor, and electric tool service life is short occurs.

In view of this, it is necessary to provide a kind of improved electric tools, to solve the above problems.

Utility model content

The purpose of this utility model is to provide a kind of multi-functional electric tools with switching mechanism, which can Realize the switching between multiple functions of electric tool, and simple in structure, easy to operate, function-stable.

To achieve the above object, the utility model provides a kind of electric tool, at least has electric drill function and impact Functions of wrench, including shell and the handle with the angled arrangement of institute's shell, the handle are electronic equipped with opening or closing The switch of tool, the shell, which defines, longitudinal axis, fixed in housing rear end position to contain power plant module, the front end of shell The switching mechanism for being provided with power output system in position and coordinating with power output system, the switching mechanism is selectable to be set Determine electric tool and be in electric drill function or impact wrench function, the power output system includes main shaft, export head and and main shaft The active impact structure of linkage, the rear-end of spindle, which is directly or indirectly driven by power plant module, to be rotated, the export head one End is limited with front-end of spindle, and export head can be rotated relative to main shaft, and the export head is equipped with passive impact structure, the active punching It hits component to engage with passive impact structure and mutually limit rotation, when load of the active impact structure suffered by main shaft increases to spy It is selectable when definite value to be disengaged from passive impact structure, to apply intermittent impact to export head in direction of rotation Power, the switching mechanism include latch member, and the latch member is selectable to be engaged with active impact structure, works as latch member Synchronous rotary when being engaged with active impact structure, and active impact structure is engaged with passive impact structure always, when lock construction element not When being engaged with active impact structure, active impact structure is intermittent under the linkage of main shaft to be engaged with passive impact structure with reality Intermittent impact force now is applied to passive impact structure in a rotational direction.

The latch member is cylindrical as a further improvement of the utility model, and the latch member can be along longitudinal direction Axis direction is moved forward and backward, and is engaged or is disengaged from active impact structure to realize.

The front position of the latch member is formed with dentation latch portion, institute as a further improvement of the utility model, The back-end location for stating active impact structure is formed with the dentation limiting section coordinated with latch portion, passes through nibbling for latch portion and limiting section It closes or is disengaged from and realize engaging or being disengaged from for latch member and active impact structure.

The latch member peripheral surface, which is recessed inwardly, as a further improvement of the utility model, is formed with circular ring shape connection Dynamic slot, the switching mechanism further includes having at least one linkage component, and the linkage component, which is formed with, to be protruded into linkage slot Driven sliding block, the linkage component are only capable of realizing the back-and-forth motion on longitudinal axis direction, pass through linkage component axis along longitudinal direction Back-and-forth motion on direction is to realize the back-and-forth motion for driving latch member to synchronize on along the longitudinal axis.

The switching mechanism further includes operating member as a further improvement of the utility model, the operating member with Linkage component links, and the operating member is cylindrical, and the operating member can realize the rotation of certain angle in circumferential direction Turn, the rotation of the operating member drives linkage component in the back-and-forth motion on longitudinal axis direction.

The operating member is formed there through at least one sliding conduit as a further improvement of the utility model, described Sliding conduit include the leading portion slot circumferentially formed, positioned at the leading portion slot back-end location and circumferentially formed Back segment slot and the lead-over groove that is respectively communicated with leading portion slot and back segment slot and extends along the direction tilted with longitudinal axis direction, Between interconnected the leading portion slot and lead-over groove in the angle formed on operating member peripheral surface be obtuse angle, phase interconnection In the angle formed on operating member peripheral surface also it is obtuse angle between logical back segment slot and lead-over groove, the linkage component includes Protrude into the active sliding block in sliding conduit.

The electric tool further includes fixes sleeve as a further improvement of the utility model, the fixes sleeve with Shell is directly or indirectly fixed, and the limiting slot extended along the longitudinal axis, the linkage are formed in the fixes sleeve Component is formed with the transition sliding block in projection such as limiting slot, realizes that linkage component is only capable of realizing longitudinal axis side by fixes sleeve Upward back-and-forth motion.

Active impact structure front end face forward end at circumferential position as a further improvement of the utility model, It protrudes out and is formed at least one active impact block, the peripheral surface of the back-end location of the export head is diametrically integrated outward At least one passive impact structure has been extended to form, has been contacted in fact in the face in circumferential direction with passive impact structure by active impact block Now active impact structure and passive impact structure engage.

The electric tool further includes sphere, spring and bearing module as a further improvement of the utility model, described Spring is compressed spring, and the bearing module includes several balls and a becket, is concaved on the main shaft periphery face It falls into and is formed at least one rolling groove, the rolling groove is substantially V-shaped, the rolling channel opening rear end position, the master Dynamic impact structure is generally cylindrical, and active impact structure axial location is formed through axis hole, the active impact structure Axis hole inner surface, which is recessed inwardly, is formed at least one mating groove, and the main shaft is arranged in the axis hole of active impact structure, institute It is corresponding with mating groove to state rolling groove, the sphere is movably held in mutual corresponding rolling groove and mating groove, described Active impact structure rear end face, which is recessed inwardly, is formed with annular bearing slot, and the center of circle of the annular bearing slot is in active impact structure Axis on, one end of the spring correspond to it is direct or indirect is fixed on shell, the other end correspondence of spring protrudes into In the bearing groove and press on becket rear surface, the front surface of the becket is by the rotatable limitation of several balls In bearing groove, by under the linkage of sphere and the cooperation of bearing module so that main shaft is revolved in synchronous drive active impact structure During turning, and synchronous drive active impact structure is moved forward and backward along the longitudinal axis.

The electric tool further includes driving wheel of the peripheral surface at circular ring shape as a further improvement of the utility model, The driving wheel axle center is fixed with main shaft, and follows main shaft to rotate always, and the latch member is sheathed on the driving wheel periphery Face, the latch member follow driving wheel to rotate always by drive wheel, while latch member can be with respect to driving wheel in vertical It is moved forward and backward to axis direction.

The utility model has the beneficial effects that：In the utility model, pass through the design of switching mechanism so that electronic work energy Enough realize that the switching of stablizing between electric drill function and impact wrench function, the switching mechanism have structure and processing procedure letter simultaneously List, low production cost, function-stable, it is easy to operate the advantages that.

Description of the drawings

Fig. 1 is the electric tool front view of the utility model specific embodiment.

Fig. 2 is the internal structure chart of the electric tool of the utility model specific embodiment, main presentation electric tool Power plant module, speed-variable module, switching mechanism, impact module and export head between fiting relation figure.

Fig. 3 is the further exploded view of structure chart shown in Fig. 2, and the operation of switching mechanism is removed on the basis of Fig. 2 Component.

Fig. 4 is the further exploded view of structure chart shown in Fig. 3, and the fixation of switching mechanism is removed on the basis of Fig. 3 Sleeve, while the latch member of switching mechanism is in the schematic diagram of first position state.

Fig. 5 is the further exploded view of structure chart shown in Fig. 3, and the fixation of switching mechanism is removed on the basis of Fig. 3 Sleeve, while the latch member of switching mechanism is in the schematic diagram of second position state.

Fig. 6 is the further exploded view of structure chart shown in Fig. 3, and the fixation of switching mechanism is removed on the basis of Fig. 3 Sleeve, latch member, linkage component and active impact structure.

Fig. 7 is matching between the main shaft of the electric tool of the utility model specific embodiment, active impact structure and sphere The front view of conjunction relationship.

Fig. 8 is the fiting relation figure between the main shaft and sphere of the electric tool of the utility model specific embodiment.

Fig. 9 is sectional views of the Fig. 7 from line A-A.

Figure 10 is sectional view of the active impact structure in Fig. 7 from line A-A.

Figure 11 is the stereoscopic schematic diagram of the active impact structure of the electric tool of the utility model specific embodiment.

Specific implementation mode

In order to keep the purpose of this utility model, technical solution and advantage clearer, below in conjunction with the accompanying drawings and it is embodied The utility model is described in detail in example.

It please refers to Fig.1 to a kind of specific implementation mode for shown in Figure 11, being the utility model electric tool 100, this is electronic Tool 100 has the function of impact wrench and electric drill function.

Described in please referring to Fig.1, which is similar to pistol-shaped, including shell 1 and and shell substantially cylindrical in shape The handle 2 of 1 angled arrangement.The definition of the shell 1 has longitudinal axis 101.One end of the shell 1 is equipped with output power Export head 4.The upper part of the handle 2 is equipped with the switch 11 for being used to open or closing electric tool 100.The electronic work 2 bottom of handle of tool 100 is typically provided dismountable battery pack for providing energy to the work of electric tool 100 and (does not mark Show).In addition convenient and accurate in order to state in full, using one end where export head on shell 14 as front end, the opposite other end For rear end.

Shown in please referring to Fig.1, the top of the shell 1 is equipped with power and energy toggle 12, the function close to front position Conversion toggle 12 is arranged in the switching window 13 of 1 top of shell and circumferentially extending, and switching window 13 is circumferentially by one end to the other end Predeterminated position there are two being respectively arranged.The power and energy toggle 12 can move between two predeterminated positions, respectively will Electric tool 100 is as electric drill function or impact wrench function.It is dialled equipped with rate conversion the top center position of the shell 1 Button 14, the rate conversion toggle 14 are arranged in 1 top of shell and axially extending switching window 15, the rate conversion toggle 14 can be moved forward and backward in 101 direction of axis in the switching window 15 along longitudinal direction, to realize the rotational speed regulation of electric tool 100.

The internal structure of the utility model electric tool 100 is discussed in detail below in conjunction with Fig. 1 to Figure 11.

It please refers to Fig.2 and combines shown in Fig. 1, power plant module 10 is contained in the back-end location of the shell 1, specifically may be used Think a kind of direct current generator (not indicating).Motor has output shaft (not indicating) with outputting rotary power.The centre of the shell 1 Speed-variable module 20 is contained in position, is specifically as follows a kind of planetary gear system (not indicating), and planetary gear system, which has, to be passed Moving axis (does not indicate).The output shaft driving speed-variable module 20 of above-mentioned motor moves, alternative after the adjusting of speed-variable module 20 Through transmission shaft export different rotating speeds rotary power.The gearshift adjustment of the speed-variable module 20 passes through above-mentioned rate conversion toggle 14 controls.

It please refers to Fig.2 to Fig. 4 and combines shown in Fig. 1, switching mechanism 30 is provided in the front position of the shell 1.Institute It includes latch member 31, linkage component 32 and operating member 33 to state switching mechanism 30.

Shown in Fig. 4 and Fig. 5, the latch member 31 is substantially cylindrical, the front end face of the latch member 31 Dentation latch portion 311 is formed, 31 peripheral surface of latch member, which is circumferentially recessed inwardly, is formed with circular ring shape linkage slot 312.

Shown in Fig. 4 and Fig. 5, the operating member 33 includes substantially cylindrical main part 331 and and main body The power and energy toggle 12 that 331 peripheral surface of portion is wholely set.The main part 331 slides conduit there are two being formed there through 332.Described two sliding conduits 332 are symmetrical arranged in minute surface.Each sliding conduit 332 includes circumferential along main part 331 The leading portion slot 3321 that extends to form, positioned at the leading portion slot 3321 back-end location and the back segment to be formed is circumferentially extended along main part Slot 3322 and it is respectively communicated with the leading portion slot 3321 and back segment slot 3322 and along the direction that is tilted with 101 direction of longitudinal axis The lead-over groove 3323 of extension.In on 331 peripheral surface of main part between interconnected the leading portion slot 3321 and lead-over groove 3323 The angle of formation is obtuse angle, on 331 peripheral surface of main part between interconnected the back segment slot 3322 and lead-over groove 3323 The angle of formation is also obtuse angle.Leading portion slot described in the utility model 3321, back segment slot 3322 and lead-over groove 3323 seamlessly transit And width is equal.

Shown in Fig. 4 and Fig. 5, there are two the linkage component 32 is set, each linkage component 32 includes actively sliding Block 321, driven sliding block 322 (clear displaying in the utility model specification diagram) and it is held on the active sliding block 321 With the transition sliding block 323 among driven sliding block 322.In the utility model, the active sliding block 321 is cylindrical, described driven (certainly, the shape of the active sliding block 321 and driven sliding block 322 can be done mutually in a rectangular parallelepiped shape for sliding block 322 and transition sliding block 323 It changes or adaptability is changed, such as be designed to cylindric, cube-shaped etc.).Along longitudinal direction on 101 direction of axis, the transition The length of sliding block 323 is more than the length of driven sliding block 322, and the length of the driven sliding block 322 is more than the length of active sliding block 321 (i.e. the diameter of active sliding block 321).Along longitudinal direction on 101 direction of axis, the length of the driven sliding block 322 is no more than linkage slot 312 width, the length (i.e. the diameter of active sliding block 321) of the active sliding block 321 is no more than the width for sliding conduit 332.

Please refer to Fig.2 to Fig. 5 and combine Fig. 1 shown in, in the utility model, the shell 1 further include have one substantially be in circle The fixes sleeve 16 of tubular, the fixes sleeve 16 (can also fix, when electronic work with the fixation of speed-variable module 20 with shell 1 certainly When tool 100 is not provided with speed-variable module, it might even be possible to be fixed with power plant module 10).16 outer wall of the fixes sleeve is formed through Two limiting slots 161 that 101 direction of axis extends along longitudinal direction.It is symmetrical in minute surface between described two limiting slots 161.The operation Component 33 is set in 16 peripheral surface of fixes sleeve.The peripheral surface of the latch member 31 is assembled to conform to fixes sleeve 16 Inner peripheral surface.The linkage component 32 passes through the limiting slot 161 of fixes sleeve 16, the correspondence of transition sliding block 323 to be contained in limit Slot 161 is interior and the back-and-forth motion in 101 direction of longitudinal axis can be implemented in limiting slot 161, and the correspondence of active sliding block 321 can be slided In the dynamic sliding conduit 332 being contained on operating member 33, driven sliding block 322, which corresponds to, is slidably contained in latch member 31 On linkage slot 312 in.When operator along shell 1 it is circumferential in switch stir power and energy toggle 12 in window 13 when, operating member 33 within a certain angle in rotating in a circumferential direction, via the linkage of linkage component 32 so that latch member 31 is in 101 side of longitudinal axis It is moved forward or rearward before to realization.

Please refer to Fig.4 to Fig. 6, Figure 11 and combine Fig. 1 shown in, be additionally provided in the front position of the shell 1 with it is described The impact module 40 that switching mechanism 30 coordinates, the impact module 40 include active impact structure 41, sphere 42, spring 43, axis Backing block 44 and export head 4.The sphere 42 (is joined shown in Fig. 7 and Fig. 9) there are two setting.The spring 43 is compressed spring.Institute It includes several balls 441 and a becket 442 to state bearing module 44.

It please refers to shown in Fig. 5 and Figure 11, the active impact structure 41 is generally cylindrical, the active impact structure 41 Axial location is formed through axis hole 410.41 front end face of active impact structure protrudes out to be formed in each forward end of two side position of axis hole There are one active impact block 411, described two active impact blocks 411 along active impact structure 41 axis point-symmetrically.This reality In novel, each active impact block 411 is substantially in sector outward along axis hole 410.The axis hole of the active impact structure 41 410 inner surfaces are recessed inwardly there are two mating groove 412, and described two mating grooves are in minute surface along 41 diametric(al) of active impact structure Symmetrically.It is outwardly protruded on the peripheral surface of the active impact structure 41 and is formed with the corresponding latch portion 311 in latch member 31 The dentation limiting section 413 of buckle.When the lock of limiting section 413 of latch portion 311 and active impact structure 41 in latch member 31 When, it is rotated in circumferential direction wherein a side can be entirely limited another party.

Shown in Fig. 5, Fig. 6, Fig. 9 and Figure 10,41 rear end face of active impact structure, which is recessed inwardly, is formed with ring Shape bearing groove 414,414 center of circle of annular bearing slot is on the axis of active impact structure 41.The annular bearing slot 414 For accommodating bearing module 44, specifically, one end of the spring 43 corresponds to and direct or indirect is fixed on 1 a part of shell (it is not shown, can also be specifically a part for being fixed on speed-variable module 20.Certainly in the case where being not provided with speed-variable module 20, Can also be a part for being fixed on power plant module 10), the other end correspondence of spring 43 protrudes into the active impact structure In 41 bearing groove 414 and press on 442 rear surface of becket, the front surface of the becket 422 is by several balls 441 It is rotatable to be limited in bearing groove 414.When the active impact structure 41 rotates, the spring 43 will not follow rotation.

It please refers to Fig.1 to shown in Fig. 9, the export head 4 is generally cylindrical rodlike.The leading head of export head 4 is used for Different work head (not shown, such as fluted drill, nut etc.) is clamped respectively when the electric tool 100 realizes different function. The peripheral surface of the back-end location of export head 4 has diametrically integrally extended to form passive impact structure 401, this practicality outward In novel, the passive impact structure 401 is substantially in a rectangular parallelepiped shape.Each passive impact structure 401 can be corresponded to and actively be rushed It hits the active impact block 411 on component 41 and shock is contradicted with the face way of contact in circumferentially upper.

It please refers to Fig. 6 to Fig. 9 and combines shown in Fig. 1 to Fig. 5, the electric tool 100 further includes a main shaft 5.The master Axis 5 is generally cylindrical rodlike.There are two rolling grooves 51 for recess formation respectively inwards on the peripheral surface of the main shaft 5, each described Rolling groove 51 is substantially V-shaped.The opening of the rolling groove 51 end position backward.5 front end of the main shaft is limited with export head 4, institute It states 5 rear end of main shaft and the transmission shaft of speed-variable module 20 is fixed, main shaft 5 follows the transmission shaft of speed-variable module 20 to rotate (certainly always When electric tool 100 is not provided with speed-variable module 20, the main shaft 5 can be fixed directly with the output shaft of power plant module 10 or one Body).

Shown in Fig. 6 to Figure 11, described two rolling grooves 51 are corresponded with two mating grooves 412 respectively.It is described Correspondence is held in mutual corresponding rolling groove 51 and mating groove 412 two spheres 42 respectively, in a particular state, is passed through The driving of sphere 42 so that main shaft 5 during synchronous drive active impact structure 41 rotates, and can with synchronous drive actively 101 direction of axis is moved forward and backward impact structure 41 along longitudinal direction, certainly before active impact structure 41 along longitudinal direction 101 direction of axis The cooperation of spring 43 and bearing module 44 is needed during moving back and forth afterwards.

Shown in fig. 4 to fig. 6, in the utility model, the electric tool 100 further includes a peripheral surface into circular ring shape Driving wheel 6.6 axle center of the driving wheel is fixed with main shaft 5, and main shaft 5 is followed to rotate always.The clamping lock of the switching mechanism 30 Component 31 is sheathed on 6 peripheral surface of the driving wheel.The latch member 31 is driven by driving wheel 6 and driving wheel 6 is followed to revolve always Turn, at the same latch member 31 can opposite driving wheel 6 in 101 direction of longitudinal axis back-and-forth motion, the utility model especially by Being correspondingly formed in 6 peripheral surface of driving wheel and 31 inner surface of latch member can engage and axis 101 along longitudinal direction in circumferential direction Several screw threads or broached-tooth design just upwardly extended are realized.

In the utility model, the main shaft 5, fixes sleeve 16, active impact structure 41, passive impact structure 401, output First 4 can be collectively referred to as power output system.

The operation principle of the utility model electric tool 100 is introduced below in conjunction with Fig. 1 to Figure 11.It should be noted that electric Power driven tools 100 are no matter under electric drill function or under impact wrench function, the initial state when switch 11 is not turned on, the master The active impact block 411 of dynamic impact structure 41 be in always with the passive impact structure 401 of export head 4 meshing state (ginseng Fig. 4 and Fig. 5, i.e., between the two in the state that can circumferentially limit rotation mutually).

Function one, electric drill function：

It (is not marked) at this time, it may be necessary to which user stirs power and energy toggle 12 to first position, at this time 33 edge of operating member It rotates in a circumferential direction so that linkage component 32 slides onto in leading portion slot 3321, while linkage component 32 drives latch member 31 to Forward It moves to lock position (i.e. Fig. 4 states, latch member 31 and active impact structure 41 circumferentially keep synchronous rotary at this time).Herein Under state, user can open the switch 11 of electric tool 100.Power plant module 10 drives speed change speed-variable module 20 to rotate, speed change 20 driving spindle 5 of module rotates, and main shaft 5 drives driving wheel 6 to rotate, and driving wheel 6 drives latch member 31 to rotate, latch member 31 driving active impact structures 41 rotate, and active impact structure 41 drives the rotation of export head 4 to realize electric drill function.In electric drill work( Under energy, active impact structure 41 is limited by latch member 31 without being subjected to displacement in 101 direction of longitudinal axis always.

Function two, impact wrench function：

It (is not marked) at this time, it may be necessary to which user stirs power and energy toggle 12 to the second position, at this time 33 edge of operating member It rotates in a circumferential direction so that linkage component 32 slides onto in back segment slot 3322, while linkage component 32 drives latch member 31 to move back It moves to open position (i.e. Fig. 5 states).In this case, user can open the switch 11 of electric tool 100.Power plant module drives Dynamic speed change speed-variable module 20 rotates, the rotation of 20 driving spindle 5 of speed-variable module, and main shaft 5 drives the same of 41 rotation of active impact structure When drive active impact structure 41 in doing front-rear reciprocation movement on 101 direction of longitudinal axis so that active impact structure 41 With passive impact structure 401 shock is contradicted in circumferential intermittent engage.So that export head 4 is in circumferential intermittent defeated Go out torsion, to reach the function of impact wrench.

Certainly to realize that the function of above-mentioned impact wrench, each O. gracilipes structure also need to meet the following conditions：It is one, preceding Section slot 3321 is greater than active impact structure 41 and passive punching with back segment slot 3322 in the gap length on 101 direction of longitudinal axis Hit the depth of engagement of component 401.Secondly, ball 441 in the " V " shape rolling groove 51 in the theoretical position on 101 direction of longitudinal axis Move the depth of engagement that length is greater than active impact structure 41 and passive impact structure 401.

In the utility model, pass through the design of switching mechanism 30 so that electronic work 100 can realize electric drill function and punching Hit the switching of stablizing between functions of wrench, the switching mechanism 30 have simultaneously structure and processing procedure simply, low production cost, work( The advantages that capable of stablizing, is easy to operate.

Above example is merely intended for describing the technical solutions of the present application, but not for limiting the present application, although with reference to preferred embodiment pair The utility model is described in detail, it will be understood by those of ordinary skill in the art that, it can be to the technology of the utility model Scheme is modified or replaced equivalently, without departing from the spirit and scope of technical solutions of the utility model.

Claims (10)

1. a kind of electric tool, at least have the function of electric drill function and impact wrench, including shell and with institute shell at certain The handle of angle arrangement, the handle are equipped with the switch for opening or closing electric tool, and the shell definition has longitudinal axis, Fixation contains power plant module in housing rear end position, and power output system and defeated with power is provided in the front position of shell Go out the switching mechanism of system cooperation, the selectable setting electric tool of switching mechanism is in electric drill function or impact wrench work( Can, the power output system includes that main shaft, export head and the active impact structure to link with main shaft, the rear-end of spindle are straight It connects or is indirectly driven by power plant module and rotated, described export head one end is limited with front-end of spindle, and export head can be with respect to main shaft Rotation, the export head are equipped with passive impact structure, and the active impact structure is engaged with passive impact structure and mutually limited System rotation, it is selectable when load of the active impact structure suffered by main shaft increases to particular value to be detached from passive impact structure Engagement, to apply intermittent impact force to export head in direction of rotation, it is characterised in that：The switching mechanism includes clamping lock Component, the latch member is selectable to be engaged with active impact structure, same when latch member is engaged with active impact structure Step rotation, and active impact structure is engaged with passive impact structure always, it is main when lock construction element is not engaged with active impact structure It is dynamic that impact structure is intermittent under the linkage of main shaft is engaged with passive impact structure to realize in a rotational direction to passively rushing It hits component and applies intermittent impact force.

2. electric tool according to claim 1, it is characterised in that：The latch member is cylindrical, the clamping lock structure Part can be moved forward and backward along the longitudinal axis, engaged or be disengaged from active impact structure to realize.

3. electric tool according to claim 2, it is characterised in that：The front position of the latch member is formed with dentation Latch portion, the back-end location of the active impact structure are formed with the dentation limiting section coordinated with latch portion, by latch portion with The engagement of limiting section is disengaged from and realizes engaging or being disengaged from for latch member and active impact structure.

4. electric tool according to claim 2, it is characterised in that：The latch member peripheral surface is recessed inwardly to be formed There is circular ring shape linkage slot, the switching mechanism further includes having at least one linkage component, and the linkage component, which is formed with, to be protruded into The driven sliding block to link in slot, the linkage component are only capable of realizing the back-and-forth motion on longitudinal axis direction, pass through linkage component Back-and-forth motion on along the longitudinal axis is to realize the back-and-forth motion for driving latch member to synchronize on along the longitudinal axis.

5. electric tool according to claim 4, it is characterised in that：The switching mechanism further includes operating member, described Operating member links with linkage component, and the operating member is cylindrical, and the operating member can realize one in circumferential direction Determine the rotation of angle, the rotation of the operating member drives linkage component in the back-and-forth motion on longitudinal axis direction.

6. electric tool according to claim 5, it is characterised in that：The operating member is formed there through at least one sliding Conduit, it is described sliding conduit include the leading portion slot circumferentially formed, positioned at the leading portion slot back-end location and along week To the back segment slot extended to form and it is respectively communicated with leading portion slot and back segment slot and extends along the direction tilted with longitudinal axis direction Lead-over groove, between interconnected the leading portion slot and lead-over groove in the angle formed on operating member peripheral surface be obtuse angle, Between interconnected the back segment slot and lead-over groove in the angle formed on operating member peripheral surface also be obtuse angle, the linkage Component includes the active sliding block protruded into sliding conduit.

7. electric tool according to claim 4, it is characterised in that：The electric tool further includes fixes sleeve, described Fixes sleeve is directly or indirectly fixed with shell, and the limit extended along the longitudinal axis is formed in the fixes sleeve Slot, the linkage component are formed with the transition sliding block in projection such as limiting slot, realize that linkage component is only capable of reality by fixes sleeve Back-and-forth motion on existing longitudinal axis direction.

8. electric tool according to claim 1, it is characterised in that：The active impact structure front end face is close to periphery position The place's of setting forward end, which protrudes out, is formed at least one active impact block, and the peripheral surface of the back-end location of the export head is straight to outer Diameter direction has integrally extended to form at least one passive impact structure, by active impact block and passive impact structure in circumferential direction Face contact realize engaging for active impact structure and passive impact structure.

9. electric tool according to claim 1, it is characterised in that：The electric tool further includes sphere, spring and axis Backing block, the spring are compressed spring, and the bearing module includes several balls and a becket, the main shaft periphery It is recessed inwardly on face and is formed at least one rolling groove, the rolling groove is substantially V-shaped, the rolling channel opening rear end position It sets, the active impact structure is generally cylindrical, and active impact structure axial location is formed through axis hole, the active punching The axis hole inner surface for hitting component is recessed inwardly and is formed at least one mating groove, and the main shaft is arranged in the axis of active impact structure In hole, the rolling groove is corresponding with mating groove, and the sphere is movably held in mutual corresponding rolling groove and mating groove Interior, the active impact structure rear end face, which is recessed inwardly, is formed with annular bearing slot, and the center of circle of the annular bearing slot is actively On the axis of impact structure, one end correspondence of the spring is direct or indirect to be fixed on shell, the other end pair of spring It should protrude into the bearing groove and press on becket rear surface, the front surface of the becket can roll several balls Dynamic is limited in bearing groove, by under the linkage of sphere and the cooperation of bearing module so that main shaft is actively rushed in synchronous drive During hitting component rotation, and synchronous drive active impact structure is moved forward and backward along the longitudinal axis.

10. electric tool according to claim 2, it is characterised in that：The electric tool further includes peripheral surface into annulus The driving wheel of shape, the driving wheel axle center is fixed with main shaft, and follows main shaft to rotate always, and the latch member is sheathed on described Driving wheel peripheral surface, the latch member follow driving wheel to rotate always by drive wheel, while latch member can be opposite Driving wheel is moved forward and backward in longitudinal axis direction.