CN205032763U - Electric tool - Google Patents

Abstract

The utility model relates to an electric tool, include: the output shaft for the work of drive working head, the casing is formed with the depthkeeping passageway that sets up along the axial of output shaft and reaches and the accepting groove of depthkeeping passageway at the radial intercommunication of output shaft, the locking part, but radial movement ground holds in the accepting groove, the depthkeeping device, with depthkeeping passageway sliding fit in the axial of output shaft, the depthkeeping device have with locking part matched with locking portion, the elastic component holds in the accepting groove for a when the radial force was greater than the locking force, depthkeeping device and locking portion broke away from the cooperation that makes locking part and locking portion upwards keep coordinating the locking force with the axial displacement who prescribes a limit to the depthkeeping device in the footpath, between depthkeeping device and the locking part is provided. The locking part is saved the depthkeeping device in the casing under the effect of the locking force that the elastic component provided, when needing the depthkeeping function, ought outwards stimulate the depthkeeping device, make the radial force between depthkeeping device and the locking part be greater than the locking force that the elastic component provided, can relieve fixing the depthkeeping device.

Description

Electric tool

Technical field

The utility model relates to electric tool, particularly relates to a kind of hand-held gun drill type electric tool such as electric drill, percussion drill, electric hammer with fixing depth device.

Background technology

A lot of electric tool has fixing depth device (deptehstop), to prevent excess process at present.Fixing depth device arranges along the axis direction of the cutter of electric tool, can regulate in the axial direction.

The existence of fixing depth device makes the function of conventional drill gun be expanded.But the major part of fixing depth device is positioned at outside the housing of electric tool, is inconvenient to operate under the conventional operating mode not needing depthkeeping function.And if fixing depth device is taken off, then fixing depth device is easily lost.

Utility model content

Based on this, be necessary to provide a kind of fixing depth device can store electric tool in the housing.

A kind of electric tool, comprising: output shaft, in order to drive working head work; Housing, in order to hold described output shaft, be formed depthkeeping passage that the axis along described output shaft arranges and with the accepting groove of described depthkeeping passage in the radial communication of output shaft; Locking part, is contained in described accepting groove, and can move along with the axial direction angularly of described output shaft; Fixing depth device, with described depthkeeping passage being axially slidably matched at described output shaft, described fixing depth device has the tight lock part matched with described locking part; Elastic component, be contained in described accepting groove, make described locking part and described tight lock part on described locking part moving direction, keep the elastic force coordinated in order to provide, thus limit moving axially of described fixing depth device, when being greater than described elastic force along the power of locking part moving direction between described fixing depth device and described locking part, described fixing depth device departs from described tight lock part and coordinates.

Above-mentioned electric tool, can coordinate with fixing depth device under the effect of the elastic force that the locking part in housing provides at elastic component, and then fixing depth device is stored the operation making electric tool be used under conventional operating mode in the housing; When needing depthkeeping function, only need to pull out fixing depth device, when making to be greater than described elastic force along the power of locking part moving direction between fixing depth device and locking part, fixing fixing depth device can be removed, and then for realizing depthkeeping function.

Wherein in an embodiment, described tight lock part is the groove be arranged on fixing depth device, and described locking part is when described resilient force lower limit is arranged in described groove, and moving axially of described fixing depth device is limited.

Wherein in an embodiment, the sidewall of described groove is arranged to cambered surface, and locking part has the mating surface with the mating shapes of described cambered surface.

Wherein in an embodiment, described tight lock part is the projection be arranged on fixing depth device, and when described locking part abuts in described radial direction with described projection under described resilient force, moving axially of described fixing depth device is limited.

Wherein in an embodiment, described locking part described axially spacing by described housing, in described radial direction respectively by described elastic component and described housing spacing, the top of described locking part can enter in described depthkeeping passage under the effect of described elastic component.

Wherein in an embodiment, described fixing depth device comprise with described housing described output shaft be axially slidably matched compress machined surface to limit depthkeeping bar and the elastomeric element of working depth, wherein said elastomeric element is compressed when described depthkeeping bar compresses described machined surface, and the elastic-restoring force making depthkeeping bar return is provided when depthkeeping bar leaves described machined surface, wherein said tight lock part is arranged on described depthkeeping bar.

Wherein in an embodiment, described depthkeeping bar is provided with scale.

Wherein in an embodiment, described depthkeeping bar is fixed with the bearing pin that the axis along described output shaft is arranged, described elastomeric element is arranged on described bearing pin.

Wherein in an embodiment, described bearing pin is also provided with can along the limited block of described bearing pin movement, described elastomeric element is arranged on bearing pin, one end of elastomeric element is connected on described limited block, the other end abuts described depthkeeping bar, when described elastomeric element is compressed, described limited block is by described housing moving-limiting.

Wherein in an embodiment, the side of described depthkeeping bar is formed with groove, and described bearing pin is arranged in described groove and its two ends are separately fixed on two walls of groove, and described limited block is placed in described groove.

Accompanying drawing explanation

Fig. 1 to Fig. 3 is the schematic diagram of the electric tool different angles under fixing depth device non-memory state;

Fig. 4 illustrates the internal structure of the electric tool under fixing depth device non-memory state;

Fig. 5 by the limited structure of fixing depth device spacing time schematic diagram;

Fig. 6 is that position limiting structure is removed schematic diagram during fixing depth device spacing;

Fig. 7 is the disassembly diagram of electric tool subelement;

Fig. 8 is the cross-sectional schematic of electric tool under angle shown in Fig. 3;

Fig. 9 is the cross-sectional schematic that depthkeeping bar matches with limited block;

The cross-sectional schematic that Figure 10 is depthkeeping bar, limited block, regulating part match;

Figure 11 is the cross-sectional schematic that locking part coordinates with depthkeeping bar;

Figure 12 is the cross-sectional schematic that depthkeeping bar matches with feed depth gage;

Figure 13 and Figure 14 is the schematic diagram of fixing depth device electric tool different angles in the storage position;

Figure 15 is fixing depth device cross-sectional schematic in the storage position;

Figure 16 is the enlarged drawing of X part in 15.

Related elements reference numeral in figure is as follows:

110, housing 112, head 113, grip part

114, depthkeeping passage 115, accepting groove 116, locking part

117, elastic component 118, pivot 120, output shaft

130, motor 140, fixing depth device 142, depthkeeping bar

1422, scale 1423, groove 1424, bearing pin

1425, limited block 1426, tight lock part 1427, second engaging portion

144, feed depth gage 1442, main body 14422, top

14424, resilient clamp portion 1444, cam member 146, elastomeric element

148, depthkeeping dish 1482, confined planes 1484, slipmat

1485, opening 1486, locating slot 152, locating part

154, regulating part 162, engagement device 1622, first engaging portion

164, bias piece 166, operating parts 200, working head

Detailed description of the invention

For enabling above-mentioned purpose of the present utility model, feature and advantage become apparent more, are described in detail detailed description of the invention of the present utility model below in conjunction with accompanying drawing.Set forth a lot of detail in the following description so that fully understand the utility model.But the utility model can be much different from alternate manner described here to implement, those skilled in the art can when doing similar improvement without prejudice to when the utility model intension, and therefore the utility model is by the restriction of following public specific embodiment.

It should be noted that, when element is called as " being fixed on " another element, directly can there is element placed in the middle in it on another element or also.When an element is considered to " connection " another element, it can be directly connected to another element or may there is centering elements simultaneously.

Unless otherwise defined, all technology used herein and scientific terminology are identical with belonging to the implication that those skilled in the art of the present utility model understand usually.The object of the term used in description of the present utility model herein just in order to describe specific embodiment, is not intended to be restriction the utility model.Term as used herein " and/or " comprise arbitrary and all combinations of one or more relevant Listed Items.

Below in conjunction with accompanying drawing, better embodiment of the present utility model is described.

Ginseng Fig. 1 to Fig. 4, Fig. 8, the invention provides a kind of electric tool, comprise housing 110, the output shaft 120 be arranged in housing 110, driver output axle 120 rotate motor 130 and with the fixing depth device 140 that be axially slidably matched of housing 110 at output shaft 120.

The exportable rotary motion of output shaft 120, can drive working head 200 to rotate.Working head 200 can be drill bit, to perform bore operation on the machined surface of workpiece.Working head 200 also can be screwdriver bit, in order to be screwed on machined surface by screw.Therefore, electric tool is a kind of drill gun class power tool.

Fixing depth device 140 comprises the depthkeeping bar 142 be slidably matched with housing 110 and the feed depth gage 144 be enclosed within depthkeeping bar 142.Fixing depth device 140 is for limiting the depth of implements of working head 200, its operation principle is: depthkeeping bar 142 can abut on machined surface when working head 200 works, along with working head 200 advances the axially lasting of output shaft 120 under the drive of housing 110, depthkeeping bar 142 relatively will make reverse slide, if now utilize housing 110 to prop up feed depth gage 144, and make feed depth gage 144 limit depthkeeping bar 142 reverse slide, so electric tool and working head 200 cannot move on, and so just achieve depthkeeping object.By changing the position of feed depth gage 144 on depthkeeping bar 142, different depthkeeping effects can be reached.Depthkeeping bar 142 is provided with scale 1422, is convenient to the adjustment depthkeeping degree of depth.Describe in further detail below.

Housing 110 is formed spelling by left and right two and half housings usually.Housing 110 comprises head 112 and from the grip part 113 that head 112 stretches out obliquely.Output shaft 120 and motor 130 are installed in head 112.Then be provided with in grip part 113 to the power brick (non-label) of motor 130 power supply and various control circuits etc.

Ginseng Fig. 8, the axis along output shaft 120 in housing 110 is provided with depthkeeping passage 114.Aforesaid depthkeeping bar 142 can be arranged in depthkeeping passage 114 axially slidably.Owing to needing in axial sliding and the factor of the accuracy of manufacture, there is gap in depthkeeping bar 142 and depthkeeping passage 114 in the radial direction of output shaft 120.And rocking of depthkeeping bar 142 can be caused in this gap, affect the depthkeeping precision of depthkeeping bar 142.For this reason, be also provided with the adjustment structure matched with housing 110, in order to adjust fixing depth device 140 depthkeeping bar 142 in depthkeeping passage 114 time free gap in the radial direction of output shaft 120.

Ginseng Fig. 9 and Figure 10, adjustment structure comprises locating part 152 and regulating part 154.Wherein, locating part 152 to be contained in depthkeeping passage 114 and between the depthkeeping bar 142 and housing 110 of fixing depth device 140.Regulating part 154 coordinates with housing 110 with can be movable relatively, movably coordinate in the radial direction of output shaft 120 particularly, in order to force locating part 152 towards the elastic deformation of depthkeeping bar 142 side, and then occupy depthkeeping bar 142 activity space diametrically, thus reduction shaking volume, promote depthkeeping precision.

In Fig. 9 and Figure 10, the both sides of depthkeeping bar 142 are equipped with locating part 152.The side that locating part 152 is relative with depthkeeping bar 142 is equipped with V-shaped groove (non-label).Depthkeeping bar 142 to be clipped between two locating parts 152 and can to slide axially by relative two locating parts 152, and the corresponding V-shaped groove in its both sides is respectively arranged with vee-block part (non-label).Regulating part 154 is the screw element with housing 110 threaded engagement, is connected on locating part 152.When needs regulate aforementioned active space, tightening or unscrewing by screw element, reaches the object of fine setting V-shaped groove structure, realizes gap adjustment.

Locating part 152 is provided with V-shaped groove, like this when locating part 152 is under the extruding of regulating part 154 during elastic deformation, and two cell walls micro-deformation in a different direction of V-shaped groove.Also namely, locating part 152 have two can micro-deformation part and deformation direction is different, can occupy depthkeeping bar 142 free gap diametrically along different directions, effect when reducing free gap is more remarkable.

In such scheme, the both sides of depthkeeping bar 142 are equipped with locating part 152.But also only locating part 152 can be set in the side of depthkeeping bar 142.Now, locating part 152 still can arrange V-shaped groove.The depthkeeping bar 142 of fixing depth device 140 is clipped between the inwall of locating part 152 and depthkeeping passage 114.Unscrewed by tightening of screw element, reach the object of fine setting V-shaped groove structure, realize gap adjustment.

In addition, locating part 152 also can be with the axis of output shaft 120 for the axle collar was around depthkeeping bar 142 1 weeks, and therebetween can the configuration of relative sliding ground.Also namely locating part 152 can be tubular, utilizes regulating part 154 can extrude locating part 152 equally like this, makes its barrel elastic deformation to occupy depthkeeping bar 142 free gap diametrically.Locating part 152 can be made up of elastomeric material.

In above-described embodiment, regulating part 154 only has a place, certainly according to the shape of housing 110, can arrange many places in the position be applicable to.As the outside at two locating parts 152 all arranges regulating part 154.And for example, when locating part 152 is tubular, many places regulating part is circumferentially being set.Like this, multiple regulating part 154 is when different parts abuts locating part 152, and locating part 152 has multiple position and is out of shape along different directions.

Locating part 152 comprises at least two crushed elements, also can have other implementation.Such as, locating part 152 adopts larynx hoop or similar structures, can tighten up larynx hoop when regulating part 154 moves, and then occupies depthkeeping bar 142 free gap diametrically.

In addition, when the relative housing 110 of regulating part 154 moves, also can be force locating part 152 to move towards depthkeeping bar 142, and then occupy depthkeeping bar 142 free gap diametrically.

When fixing depth device 140 uses, depthkeeping bar 142 can progressively enter in depthkeeping passage 114 along the direction that working head 200 direction of advance is contrary, until feed depth gage 144 abuts to housing 110.In the present embodiment, fixing depth device 140 also comprises the elastomeric element 146 be limited between housing 110 and depthkeeping bar 142, automatically returns to initial position to make depthkeeping bar 142 after the operation of end depthkeeping.

Ginseng Fig. 7 and Fig. 8, the side of depthkeeping bar 142 is formed with groove 1423.Bearing pin 1424 is fixed with in groove 1423.Bearing pin 1424 is arranged along the extending direction (in Fig. 7 with Fig. 8 with output shaft 120 axial consistent) of depthkeeping bar 142, and its two ends are separately fixed on two relative walls of groove 1423.Elastomeric element 146 can axially movably be arranged on bearing pin 1424.Bearing pin 1424 is provided with transportable limited block 1425.One end of elastomeric element 146 is connected on limited block 1425, and the other end is then connected to a wall of the groove 1423 of depthkeeping bar 142.

Depthkeeping bar 142 is in execution depthkeeping function course, one end that depthkeeping bar 142 is positioned at outside housing 110 abuts machined surface, the other end then progresses in the depthkeeping passage 114 of housing 110, and limited block 1425 abuts on housing 110, makes elastomeric element 146 constantly by compression also storage power.When working head 200 stops operation, after depthkeeping bar 142 leaves machined surface, elastomeric element 146 provides the elastic-restoring force making depthkeeping bar 142 return, makes depthkeeping bar 142 self-return, to use during next depthkeeping operation.Elastomeric element 146 is for being enclosed within the spring on bearing pin 1424 herein.Can certainly be other flexible members, as bullet pad etc.

Ginseng Figure 11, composition graphs 8, housing 100 is also provided with depthkeeping passage 114 at the coconnected accepting groove 115 of the radial direction of output shaft 120.The locking part 116 that can move radially and the elastic component 117 bottom accepting groove 115 and between locking part 116 is provided with in accepting groove 115.Ginseng Figure 16, depthkeeping bar 142 is provided with the tight lock part 1426 matched with locking part 116.Locking part 116 is not limited to radially move, and moves along the axial direction angularly with output shaft 120.

Elastic component 117 provides and makes locking part 116 and tight lock part 1426 on locking part 116 moving direction, keep the elastic force coordinated, can be locked in the axial direction after making depthkeeping bar 142 be inserted into depthkeeping passage 114 bosom, can not under the elastic force effect of elastomeric element 146 automatic spring, make fixing depth device 140 can be in store status as illustrated in figs. 13-15.When needs depthkeeping bar 142 ejects, only need to pull depthkeeping bar 142 gently, when making to be greater than aforementioned flexible power along the power on locking part 116 moving direction between the tight lock part 1426 of depthkeeping bar 142 and locking part 116, locking part 116 can be made no longer depthkeeping bar 142 to be played to the effect of axial limiting, and namely locking part 116 departs from depthkeeping bar 142 and coordinates.

With reference to Figure 16, in the present embodiment, tight lock part 1426 is for being arranged on the groove on the depthkeeping bar 142 of fixing depth device 140.Locking part 116 in the presence of a tensile force with groove just male-female engagement, by friction therebetween and obstruction axially, reach the object that restriction depthkeeping bar 142 moves axially.The sidewall of groove is arranged to cambered surface, and locking part 116 has the mating surface with the mating shapes of aforementioned cambered surface.In other words, locking part 116 can be arranged to the conical surface or the left and right sides arranges cambered surface, and like this, depthkeeping bar 142 is inserting in depthkeeping passage 114 or the process that exits, and locking part 116 easily enters in groove or from groove and exits.

In other examples, tight lock part 1426 is for being arranged on the projection on depthkeeping bar 142.When storing depthkeeping bar 142, projection is made to cross locking part 116.In addition, tightly prop up projection diametrically under the resilient force that locking part 116 provides at elastic component 117, do not need projection to cross locking part 116, as long as the elastic force that elastic component 117 provides enough can ensure enough axial frictions.Further, depthkeeping bar 142 can not arrange projection, locking part 116 is directly connected on the flat of depthkeeping bar 142.

Ginseng Figure 11, locking part 116 is spacing by housing 110 in the axial direction, diametrically respectively by elastic component 117 and housing 110 spacing.The top of locking part 116 can enter in depthkeeping passage 114 under the effect of elastic component 117, can be pressed in locking part 116 top and compression elastic piece 117 when depthkeeping bar 142 inserts.

Owing to being provided with locking part 116, elastic component 117, the end of depthkeeping bar 142 can be fixed in depthkeeping passage 114, realizes the object that depthkeeping bar 142 stores.When not needing to store, only need to pull depthkeeping bar 142 gently, it can be separated with locking part 116.

Ginseng Fig. 4 to Fig. 7, electric tool also comprises the position limiting structure being assembled in housing 110, in case surprisingly depart from housing 100 when the dark bar 142 of fastening is ejected by elastomeric element 146, or prevents because external force factor unexpectedly departs from.Position limiting structure comprises engagement device 162, bias piece 164 and operating parts 166.Wherein, engagement device 162 is connected with housing 110 with can be movable relatively, and moves between its second place that can abut in the primary importance and disengaging axially abutting depthkeeping bar 142.Bias piece 164 provides and makes engagement device 162 move to primary importance from the second place and remain on the driving force of primary importance, in case the dark bar 142 of fastening is undesirably ejected or pulls out.Operating parts 166 overcomes the driving force of bias piece 164 to move to the second place from primary importance in order to drive engagement device 162, and then depthkeeping bar 142 can be drawn out.

Housing 110 inside is provided with pivot 118.Engagement device 162 is rotationally connected with pivot 118.Bias piece 164 is torsion spring, is arranged on pivot 118, and its one end abuts engagement device 162, and the other end abuts housing 110.Operating parts 166 is positioned at the outside of housing 110 and is connected with engagement device 162, and operating parts 166 and housing 110 are rotationally connected.Under normality, when engagement device 162 is positioned at the primary importance shown in Fig. 5 under the effect of bias piece 164.When pulling operating parts 166, the resistance that its engagement device 162 overcomes bias piece 164 pivotally 118 turn to Fig. 6 make the second place shown.

Engagement device 162 is provided with the first engaging portion 1622, the depthkeeping bar 142 of fixing depth device 140 is then provided with the second engaging portion 1427.In Fig. 6, the first engaging portion 1622 and the second engaging portion 1427 are snap fit, and the bending direction of the two is contrary.So, when engagement device 162 is positioned at the primary importance shown in Fig. 5, the first engaging portion 1622 and the second engaging portion 1427 axially can abut in depthkeeping passage 114.When engagement device 162 is positioned at the second place shown in Fig. 6, the first engaging portion 1622 and the second engaging portion 1427 axial separation.First engaging portion 1622 and the second engaging portion 1427 also can be common projection or other structures, as long as can meet the requirement axially abutting and be separated.

In above-described embodiment, engagement device 162, operating parts 166 are all rotationally connected with housing 110.When engagement device 162 and housing 110 be rotationally connected, operating parts 166 also can be slidably connected with housing 110.In addition, engagement device 162, operating parts 166 can also all be slidably connected with housing 110.Particularly, engagement device 162 and housing 110 are slidably connected, and the relative housing 110 of bias piece 164 driver card locking member 162 slides.Operating parts 166 drives engagement device 162 to move by sliding action.Herein, bias piece 164 does not need to adopt torsion spring, adopts general spring or other flexible members.

Owing to being provided with position limiting structure, depthkeeping bar 142 can be avoided arbitrarily to be pulled out or eject.And when needing depthkeeping bar 142 to be drawn out, can pull out after only needing to pull the axial limiting that operating parts 166 removes depthkeeping bar 142.Therefore, can prevent fixing depth device 140 from departing from from housing 110 when store status is converted to using state, also not affect fixing depth device 140 and take off on housing 110.

Feed depth gage 144 is arranged on depthkeeping bar 142, and can reach with depthkeeping bar 142 as required can relative sliding or can not the state of relative sliding.When the two cannot relative sliding time, depthkeeping bar 142 persistent movement to abut to feed depth gage 144 with housing 110 time, the length that depthkeeping bar 142 enters in the depthkeeping passage 114 of housing 110 is just determined, namely depthkeeping function realizes.

Ginseng Figure 12, feed depth gage 144 comprises the main body 1442 be enclosed within depthkeeping bar 142 and the cam member 1444 be rotationally connected with main body 1442.Main body 1442 comprises the top 14422 and resilient clamp portion 14424 that lay respectively at depthkeeping bar 142 both sides.Cam member 1444 can rotate between clamped position and released position, when wherein cam member 1444 marks the clamped position of B in Fig. 5,6 and 8, cam member 1444 is connected in resilient clamp portion 14424, depthkeeping bar 142 clamps by resilient clamp portion 14424 and top 14422, and main body 1442 and depthkeeping bar 142 can not relative slidings.When cam member 1444 marks the released position that A illustrates in Fig. 5,6 and 8, main body 1442 and depthkeeping bar 142 can relative slidings.Resilient clamp portion 14424 can be the shell fragment offering groove or breach formation in the bottom of main body 1442, also can be that the bottom integrated of main body 1442 is arranged to have elasticity.

Feed depth gage 144 also can have other implementation.Such as, feed depth gage 144 and depthkeeping bar 142 have can the location status of relative sliding, but feed depth gage 144 only needs the ability possessing the motion of unidirectional restriction depthkeeping bar 142.Such as, feed depth gage 144 arranges ratchet, depthkeeping bar 142 correspondence arranges ratchet.When ratchet coordinates with ratchet, when feed depth gage 144 is motionless, depthkeeping bar 142 can only move along the direction away from housing 110.And if depthkeeping bar 142 will enter depthkeeping passage 114, then feed depth gage 144 can be driven to move together, now when feed depth gage 144 abuts to housing 110, namely stop depthkeeping bar 142 to continue motion, realize depthkeeping function.

Ginseng Fig. 1, Fig. 2, the fixing depth device 140 of the present embodiment also comprises depthkeeping dish 148.Depthkeeping dish 148 is arranged on one end of depthkeeping bar 142, has the confined planes 1482 perpendicular to the extending direction of depthkeeping bar 142.Ginseng Fig. 8, when depthkeeping bar 142 inserts in depthkeeping passage 114, the extending direction of depthkeeping bar 142 and the axial consistent of output shaft 120.

Confined planes 1482 is used for abutting against with machined surface.Ginseng Fig. 2, confined planes 1482 is provided with slipmat 1484.Slipmat 1484 can protrude from the surface or concordant with the surface of confined planes 1482 of confined planes 1482.Can by arranging groove on confined planes 1482, then filling anti-slip material or installation tread plate realize.Also can realize by boning.When slipmat 1484 protrudes from confined planes 1482, during design depthkeeping bar 142 only need the thickness of slipmat 1484 to take into account.

Owing to being provided with slipmat 1484, when in the smooth flat such as ceramic tile during operation, confined planes 1482, by slipmat 1484, can touch smooth flat reposefully, thus reduces shaking volume, promotes depthkeeping precision.

Ginseng Fig. 8, Fig. 1, Fig. 2, confined planes 1482 offers the opening 1485 running through depthkeeping dish 148 along the extending direction of depthkeeping bar 142.In the outer locating slot 1486 being arranged with at least one pair of and linearly arranging of opening 1485 on confined planes 1482, and at least one pair of locating slot 1486 lays respectively at the both sides of opening 1485.In the present embodiment, opening 1485 is rounded, and at least one pair of locating slot 1486 is arranged in a straight line along the diameter place of opening 1485.

When fixing depth device 140 is installed to after on housing 110, working head 200 is just to opening 1485.When working head 200 performs bore operation, hole, can see from Figure 13 to 15 via opening 1485 pairs of machined surfaces, working head 200 can pass depthkeeping dish 148.The axis of output shaft 120 overlaps with the center line of opening 1485, and the axis of working head 200 is overlapped with the center line of opening.When needs are holed on pipe, a pair locating slot 1486 just coordinates with the outer surface of pipe respectively in the both sides at center hole to be drilled, thus realizes, to heart boring, extending the range of application of fixing depth device 140, still can realizing depthkeeping function simultaneously.

Locating slot 1486 is not limited to arrange a pair, when arranging multipair, can be evenly arranged in a circumferential direction.In the present embodiment, two pairs of locating slots, 1486, two pairs of locating slots 1486 are set and are circumferentially staggered 90 degree at opening.Like this, under electric tool is in the gripping angle case shown in Fig. 1, can realize the pipe erectting pipe or the horizontal positioned of placing holing to the heart.And if pipe is placed with other angles, electric tool is only needed to rotate minimum angle, very big handled easily.

In such scheme, opening 1485 is arranged to circle.Such as, but it also can be other shapes, rectangular aperture.Now, only need the axis of output shaft 120 is overlapped with open centre line, just still can realize holing to the heart.Further, opening is also not necessarily wanted must be arranged to the regular shape such as circle, rectangle, as long as make the axes normal of output shaft 120 in the arrangement straight line of a pair locating slot 1486.

Each technical characteristic of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this description is recorded.

The above embodiment only have expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to utility model patent scope.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.

Claims (10)

1. an electric tool, is characterized in that, comprising:

Output shaft, in order to drive working head work;

Housing, in order to hold described output shaft, be formed depthkeeping passage that the axis along described output shaft arranges and with the accepting groove of described depthkeeping passage in the radial communication of output shaft;

Locking part, is contained in described accepting groove, and can move along with the axial direction angularly of described output shaft;

Fixing depth device, with described depthkeeping passage being axially slidably matched at described output shaft, described fixing depth device has the tight lock part matched with described locking part;

Elastic component, be contained in described accepting groove, make described locking part and described tight lock part on described locking part moving direction, keep the elastic force coordinated in order to provide, thus limit moving axially of described fixing depth device, when being greater than described elastic force along the power of locking part moving direction between described fixing depth device and described locking part, described fixing depth device departs from described tight lock part and coordinates.

2. electric tool according to claim 1, is characterized in that, described tight lock part is the groove be arranged on fixing depth device, and described locking part is when described resilient force lower limit is arranged in described groove, and moving axially of described fixing depth device is limited.

3. electric tool according to claim 2, is characterized in that, the sidewall of described groove is arranged to cambered surface, and locking part has the mating surface with the mating shapes of described cambered surface.

4. electric tool according to claim 1, it is characterized in that, described tight lock part is the projection be arranged on fixing depth device, and when described locking part abuts in described radial direction with described projection under described resilient force, moving axially of described fixing depth device is limited.

5. electric tool according to claim 1, it is characterized in that, described locking part described axially spacing by described housing, in described radial direction respectively by described elastic component and described housing spacing, the top of described locking part can enter in described depthkeeping passage under the effect of described elastic component.

6. electric tool according to claim 1, it is characterized in that, described fixing depth device comprise with described housing described output shaft be axially slidably matched compress machined surface to limit depthkeeping bar and the elastomeric element of working depth, wherein said elastomeric element is compressed when described depthkeeping bar compresses described machined surface, and the elastic-restoring force making depthkeeping bar return is provided when depthkeeping bar leaves described machined surface, wherein said tight lock part is arranged on described depthkeeping bar.

7. electric tool according to claim 6, is characterized in that, described depthkeeping bar is provided with scale.

8. electric tool according to claim 6, is characterized in that, described depthkeeping bar is fixed with the bearing pin that the axis along described output shaft is arranged, described elastomeric element is arranged on described bearing pin.

9. electric tool according to claim 8, it is characterized in that, described bearing pin is also provided with can along the limited block of described bearing pin movement, described elastomeric element is arranged on bearing pin, one end of elastomeric element is connected on described limited block, the other end abuts described depthkeeping bar, and when described elastomeric element is compressed, described limited block is by described housing moving-limiting.

10. electric tool according to claim 9, is characterized in that, the side of described depthkeeping bar is formed with groove, and described bearing pin is arranged in described groove and its two ends are separately fixed on two walls of groove, and described limited block is placed in described groove.