CN101143440A - Electric power tool - Google Patents
Electric power tool Download PDFInfo
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- CN101143440A CN101143440A CNA2007101626648A CN200710162664A CN101143440A CN 101143440 A CN101143440 A CN 101143440A CN A2007101626648 A CNA2007101626648 A CN A2007101626648A CN 200710162664 A CN200710162664 A CN 200710162664A CN 101143440 A CN101143440 A CN 101143440A
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Abstract
An electric power tool is provided which prevents malfunction with excellent operability even when one operation mode among various modes is selectable. In a gear case of a housing, there are provided a clutch switching groove which engages with a connecting projection of a clutch switching lever, a slit which guides a guide body having a stepped pin which penetrates an impact switching groove to engage with an auxiliary ring, and a percussion switching groove which engages with a connecting projection of a percussion switching lever. In addition, a switching case is externally provided, so that combination of sliding positions of each switching member can be changed. As the switching case can be operated by a switching button, any of all operation modes, which are, a drill mode, an impact mode, a percussion drill mode, and a clutch mode can be selected with the switching button only.
Description
The application be that October 21, application number in 2005 are 200510114289.0 the applying date, denomination of invention divides an application for the application of " electric tool ".
Technical field
The present invention relates to a kind of selection and can give intermittent hit or the output shaft that protrudes in housing the place ahead towards the electric tool of axial vibrations etc. by pattern.
Background technology
As electric tool, known have for example patent documentation 1 described percussion tool etc.Here, rotation with the output shaft of motor, be delivered to driving shaft in the housing via planetary gear reducing mechanism, on this driving shaft, the hammer that utilizes helical spring and forwards load is housed outward via ball, by this hammer is engaged with arm to the outstanding hammer anvil (output shaft) in the place ahead of body shell, thereby the rotation of driving shaft is delivered to hammer anvil via hammer.When to the load of hammer anvil when higher, by the rotation of ball, hammer retreats, and temporary transient the releasing and the engaging of the arm of hammer anvil utilized helical spring loading and advanced once more and engage with arm again.By the action of this hammer, produce intermittent hit (conflicting model) at hammer anvil.
And, here, also can select to remove the strike of hitting mechanism and give, hammer anvil is not produced the drill mode of strike.This decontrol, the carriage of the final level of planetary gear reducing mechanism is set to axially movably simultaneously, can carry out move operation by control member from the outside, in this carriage, via the switching pin by the driving shaft axle center, the connecting elements that connection can engage with driving shaft and hammer anvil both sides, the carriage that causes by control member mobile as switching member, connecting elements is moved to the sliding position that engages with driving shaft and hammer anvil both sides, make driving shaft and hammer anvil integrated.
On the other hand, known also just like patent documentation 2 described vibrations borings with percussion mechanism, but it is axially in the main shaft (output shaft) that the setting of front and back fine motion is rotated by the motor driving, the charger forward direction of the helical spring by being loaded on main shaft outward etc. loads, on the other hand, be installed with the first clutch of one rotation at main shaft, in housing, be installed with second clutch, this second clutch is that main shaft movably inserts, relative with first clutch to clutch, be installed in the tool heads on the main shaft and when main shaft is retreated pressing, by the engagement of two clutches, can give main shaft vibrations action vertically.
In installation, can adopt following structure: as the document is disclosed to the tool heads of main shaft, except utilization is arranged on the chuck of main shaft, the chuck cover that is contained in outward on the front end of main shaft is provided with according to the mode that the stroke with regulation can move forward and backward vertically, simultaneously, utilize any forwards, backwards side of charger of helical spring etc. to load, sliding position in this loading, center axis to main shaft is pushed pressing member, this pressing member is at the members such as ball of main shaft movably to establish in the mode in its radiation direction, can only pull out fixing with being inserted into the tool heads that is arranged on the plug-in opening on the main shaft.When opposition side slided, releasing chuck cover was pushed pressing member when the opposing of chuck cover is loaded, and can insert or break away from tool heads.
But, in percussion tool, outside conflicting model and drill mode, the situation of the clutch mode (drive pattern) that also useful regulation torque to hammer anvil rotation capable of blocking is transmitted.For example, this structure obtains by having press device, when this press device can make rotation of the inside engaged gear that is arranged on the planetary gear reducing mechanism between motor and the output shaft, utilize helical spring to push this inside engaged gear via the ball of the end face that is engaged to inside engaged gear and packing ring etc.That is,, when surpassing helical spring loading force, just make inside engaged gear idle running, block rotation transmission to hammer anvil when the load of hammer anvil is increased.
On the other hand, outside conflicting model and drill mode, also has the situation that produces the vibrations drill mode of vibrations vertically at hammer anvil.For example but this structure is when making hammer anvil along the fore-and-aft direction fine motion, and advanced position loads under normal conditions, at the going-back position of hammer anvil, by being arranged on the cam engagement each other in hammer anvil and the housing, makes hammer anvil produce vibrations.
Therefore, giving clutch mode and vibrations during drill mode, also need and drill mode between switching mechanism.For example, in clutch mode, adopt following structure etc.: the rotary manipulation of the control member by conversion ring etc., the switching member that can be engaged to inside engaged gear is sliding between the clamped position of inside engaged gear and non-clamped position, selects the rotation restriction of inside engaged gear and removes.In addition, in the vibrations drill mode, adopt following structure etc.: a side cam is fixed on the hammer anvil, the opposing party's cam can be rotated in housing, switching member on the cam that can be engaged to the opposing party is being slided between the clamped position of this cam and non-clamped position by control member, select vibrations to give and remove.
When selectable like this pattern becomes for a long time, just need operate respectively switching shock pattern and drill mode the impact switching member, drill mode is switched to the clutch switching member and the vibrations switching member of clutch mode or vibrations drill mode, thereby operability variation and be easy to generate maloperation.
On the other hand, in above-mentioned vibrations boring, because be respectively arranged with charger that the main shaft advanced position is loaded and the charger that loads the chuck cover, so components number increases, complex structure, thus the time of assembling also increase, with the raising of cost close relation is arranged.
Summary of the invention
Therefore, the object of the present invention is to provide a kind of electric tool, even how pattern also needn't worry maloperation and carry out the selection of pattern with good operability, and the loading that can reasonably carry out output shaft and chuck cover comes the reduction of the simple and cost of implementation structure.
A kind of electric tool of the present invention is characterized in that, comprising: housing; Motor; Planetary gear reducing mechanism, it can pass to the output of said motor to the outstanding output shaft in the place ahead of above-mentioned housing, can make 1 inside engaged gear rotation; Press device, it is by above-mentioned 1 inside engaged gear of press fit; Hit mechanism, it can give intermittent the strike to direction of rotation to above-mentioned output shaft; Decontrol, it can be removed above-mentioned strike mechanism arbitrarily the strike of above-mentioned output shaft is given; The clutch switching member, it can limit first sliding position of its rotation and leave from above-mentioned inside engaged gear and remove and slide between second sliding position of rotation restriction engaging with above-mentioned inside engaged gear; Impact switching member, first sliding position that its strike that can remove above-mentioned strike mechanism making above-mentioned decontrol action gives and do not make above-mentioned decontrol action and carry out sliding between second sliding position that the strike of above-mentioned strike mechanism gives; Common switching member, it engages simultaneously with above-mentioned clutch switching member and impact switching member, by above-mentioned two switching members being moved to moving of assigned position, can change the combination of above-mentioned each sliding position, by from the above-mentioned common switching member of above-mentioned hull outside move operation, can select conflicting model respectively, clutch mode, drill mode, this conflicting model is that the strike of carrying out above-mentioned strike mechanism simultaneously gives the pattern with the rotation restriction of above-mentioned inside engaged gear, this clutch mode is the pattern of carrying out the rotation restriction cancellation of releasing that the strike of above-mentioned strike mechanism gives and above-mentioned inside engaged gear simultaneously, and this drill mode is the pattern of carrying out the rotation restriction of releasing that the strike of above-mentioned strike mechanism gives and above-mentioned inside engaged gear simultaneously.
Electric tool of the present invention is characterized in that, also is provided with: percussion mechanism, and it can give above-mentioned output shaft to axial vibrations; Second decontrol, it can be removed above-mentioned percussion mechanism arbitrarily the vibrations of above-mentioned output shaft are given; The vibrations switching member, first sliding position that its vibrations that can remove above-mentioned percussion mechanism making above-mentioned second decontrol action give, do not make the action of above-mentioned second decontrol and carry out sliding between second sliding position that the vibrations of above-mentioned percussion mechanism give, by making above-mentioned vibrations switching member be sticked in common switching member, utilize the move operation of above-mentioned common switching member and make up the sliding position of above-mentioned vibrations switching member, also can select to shake drill mode, this vibrations drill mode is to hit the releasing that the strike of mechanism gives and the rotation restriction of inside engaged gear simultaneously, give with the vibrations of above-mentioned percussion mechanism.
A kind of electric tool of the present invention is characterized in that, comprising: housing; Motor; Planetary gear reducing mechanism, it can pass to the output of said motor to the outstanding output shaft in the place ahead of above-mentioned housing; Hit mechanism, it can give intermittent the strike to direction of rotation to above-mentioned output shaft; Decontrol, it can be removed above-mentioned strike mechanism arbitrarily the strike of above-mentioned output shaft is given; Percussion mechanism, it can give above-mentioned output shaft to axial vibrations; Second decontrol, it can be removed above-mentioned percussion mechanism arbitrarily the vibrations of above-mentioned output shaft are given; Impact switching member, first sliding position that its strike that can remove above-mentioned strike mechanism making above-mentioned decontrol action gives and do not make above-mentioned decontrol action and carry out sliding between second sliding position that the strike of above-mentioned strike mechanism gives; The vibrations switching member, first sliding position that its vibrations that can remove above-mentioned percussion mechanism making the action of above-mentioned second decontrol give and do not make above-mentioned second decontrol action and carry out sliding between second sliding position that the vibrations of above-mentioned percussion mechanism give; Common switching member, it engages simultaneously with above-mentioned impact switching member and vibrations switching member, by above-mentioned two switching members being moved to the mobile of assigned position, can change the combination of above-mentioned each sliding position, by from the above-mentioned common switching member of above-mentioned hull outside move operation, can select conflicting model respectively, drill mode, the vibrations drill mode, this conflicting model is the pattern that the strike of carrying out above-mentioned strike mechanism simultaneously gives the releasing that the vibrations with above-mentioned percussion mechanism give, this drill mode is the pattern of carrying out the releasing that the vibrations of releasing that the strike of above-mentioned strike mechanism gives and above-mentioned percussion mechanism give simultaneously, and this vibrations drill mode is to carry out the pattern that the vibrations of releasing that the strike of above-mentioned strike mechanism gives and above-mentioned percussion mechanism give simultaneously.
Electric tool of the present invention, it is characterized in that, above-mentioned percussion mechanism has first cam and second cam, this first cam and the output shaft one rotation that is provided with in the mode that can move forward and backward, this second cam arrangement is at the rear of this first cam, and is meshing with each other at the going-back position and above-mentioned first cam of above-mentioned output shaft.
Electric tool of the present invention is characterized in that, is provided with the charger that progressive position that above-mentioned output shaft is left from from second cam to above-mentioned first cam loads.
Electric tool of the present invention, it is characterized in that, above-mentioned second decontrol, with respect to above-mentioned second cam that rotatably is provided with, make above-mentioned vibrations switching member select to limit the block of above-mentioned second sliding position of its rotation and releasing and above-mentioned second cam with the above-mentioned second cam block and allow its rotation above-mentioned first sliding position any one and move.
Electric tool of the present invention, it is characterized in that, above-mentioned vibrations switching member is an annular component, this annular component has the block tooth of the block tooth engagement that can form with the periphery at above-mentioned second cam at front end, under the rotation restriction state, be set up, limit the rotation of second cam at the progressive position that becomes second sliding position in the mode that can move forward and backward.
Electric tool of the present invention, it is characterized in that, in above-mentioned planetary gear reducing mechanism, be provided with can make another inside engaged gear before and after with it the binding site that combines of any carriage and remove above-mentioned another inside engaged gear and carriage combine in conjunction with the releasing position between the speed switching member that slides, by above-mentioned speed switching member is engaged with common switching member, utilize the move operation of above-mentioned common switching member and make up the sliding position of above-mentioned speed switching member, thereby the speed that can carry out under arbitrary patterns is switched.
Electric tool of the present invention is characterized in that, above-mentioned speed switching member is that axle is supporting above-mentioned another inside engaged gear and can be with above-mentioned another inside engaged gear to the annular component that axially moves forward and backward, is provided with the restriction rotation status.
Electric tool of the present invention, it is characterized in that, above-mentioned common switching member is set on the periphery of the gear-box that holds planetary gear reducing mechanism and hit mechanism, by the operation of the switching push button of the outside by being exposed to housing and mobile a-b box forms, make moving of each switching member of causing by this a-b box, limiting groove by a direction on any one party that is arranged on said gear case or a-b box, being arranged on the opposing party goes up and the switching groove different with above-mentioned limiting groove direction, and connector and carrying out respectively, this connector connects above-mentioned limiting groove and switches groove, be arranged on any one party of above-mentioned a-b box or switching member, guiding by along with the above-mentioned switching groove that moves of above-mentioned a-b box makes above-mentioned switching member slide along above-mentioned limiting groove.
Electric tool of the present invention is characterized in that, above-mentioned a-b box has been chimeric to be provided with the switch boards of switching push button and to follow the slip of gear-box circumferencial direction of above-mentioned switch boards and half cylindrical body of one rotation.
Electric tool of the present invention is characterized in that, above-mentioned strike mechanism is made of main shaft, hammer, helical spring, cam path, ball, and this main shaft and above-mentioned output shaft transmit the rotation of said motor with arranged coaxial; This hammer is outer to be contained on this main shaft, has the engaging pawl that is sticked in above-mentioned output shaft; This helical spring will be hammered into shape to the clamped position with above-mentioned output shaft and load; This cam path is provided with from its axioversion at the inner face of above-mentioned main shaft or hammer; This ball is entrenched in this cam path, and above-mentioned main shaft is connected with hammer, allows retreating of above-mentioned hammer by the rotation in above-mentioned cam path.
Electric tool of the present invention, it is characterized in that, above-mentioned decontrol is loaded on outward on the above-mentioned hammer, with above-mentioned hammer one rotation and to axially moving forward and backward separately, make subring select any one in the going-back position that engages of the progressive position engage with above-mentioned output shaft and releasing and above-mentioned output shaft and move, this subring is given prominence to be provided with the engaging pawl of above-mentioned hammer and is the auxiliary jaw that continuous shape is connected.
Electric tool of the present invention is characterized in that, above-mentioned output shaft is the arm that the auxiliary jaw of radial outstanding engaging pawl that is provided with above-mentioned hammer and subring can engage in the rear end.
Electric tool of the present invention is characterized in that, variable above-mentioned press device is to the loading force of above-mentioned 1 inside engaged gear.
Electric tool of the present invention, it is characterized in that, above-mentioned clutch switching member be with towards the mode that axially can move forward and backward and under the rotation restriction state on the outer periphery that is contained in above-mentioned 1 inside engaged gear, engage with above-mentioned 1 inside engaged gear and limit the ring commentaries on classics member of its rotation at progressive position.
Electric tool of the present invention is characterized in that, above-mentioned impact switching member is to be contained in guide way in the a-b box, that perforation is formed on the switching groove in the gear-box and engages with above-mentioned decontrol in the mode that can move forward and backward.
A kind of electric tool of the present invention is characterized in that, comprising: housing; Motor; Output shaft, its driving by said motor is rotated, outstanding setting of axial mode with fine motion forwards, backwards, and the plug-in opening that has tool heads at front end; Percussion mechanism, it is arranged in the above-mentioned housing, can above-mentioned output shaft be given to axial vibrations at the going-back position of above-mentioned output shaft; Pressing member, its in above-mentioned output shaft with its radiation direction on movably mode be provided with; The chuck cover, its the front end of above-mentioned output shaft according to the stroke of regulation to the mode that axially can move forward and backward, and utilize charger forwards, backwards the sliding position of any one party load and be provided with, at above-mentioned sliding position above-mentioned pressing member is pushed to the center axis of above-mentioned output shaft, can only pull out the tool heads that fixedly is inserted in the above-mentioned plug-in opening, above-mentioned charger is set at the rear to the loading direction that above-mentioned chuck overlaps, the slip that causes by the loading that utilizes to this rear makes above-mentioned chuck cover contact with above-mentioned case side, thereby can make above-mentioned output shaft advanced position loading by above-mentioned charger.
Electric tool of the present invention is characterized in that, pressing member is a ball.
According to the present invention, only just can select all patterns by the operation of common switching member.Therefore, the anxiety of no maloperation and operability and reliability excellence.
In addition, even increase the vibrations drill mode, operability is also constant, also can keep good operating position.
In addition, utilize common switching member also can carry out speed simultaneously and switch, can expect the further raising of operating position.
In addition, the sliding position that each switching member easily can be led reliably.
And, only just can carry out the draw back loading of position of the loading of output shaft advanced position and chuck cover by 1 charger that is arranged on the chuck cover, become the few and rational structure of components number.Therefore, the time decreased of assembling can reduce manufacturing cost.
Description of drawings
Fig. 1 is the longitudinal sectional view of impact type screwdriver.
Fig. 2 is the exploded perspective view of internal mechanism.
Fig. 3 is the exploded perspective view of internal mechanism.
Fig. 4 is the plane of impact type screwdriver.
Fig. 5 A is the side view of gear-box part, and Fig. 5 B is the cutaway view along the A-A line.
Fig. 6 A is the cutaway view along the B-B line, and Fig. 6 B is the cutaway view along the C-C line, and Fig. 6 C is the cutaway view along the D-D line.
The top is the side view of the gear-box part under the drill mode among Fig. 7, and the below is its longitudinal sectional view (wherein illustrating conversion ring and hammer shell).
The top is the side view of the gear-box part under the conflicting model among Fig. 8, and the below is its longitudinal sectional view (wherein illustrating conversion ring and hammer shell).
The top is the side view of the gear-box part under the vibrations drill mode among Fig. 9, and the below is its longitudinal sectional view (wherein illustrating conversion ring and hammer shell).
The top is the side view of the gear-box part under the clutch mode among Figure 10, and the below is its longitudinal sectional view (wherein illustrating conversion ring and hammer shell).
The specific embodiment
Below, based on the description of drawings embodiments of the present invention.
Fig. 1 be the expression electric tool an example, be the longitudinal sectional view of impact type screwdriver, impact type screwdriver 1, the back quadrate part of the body shell 2 that constitutes at the hemisection housing by pair of right and left (with the right side of Fig. 1 as the place ahead) accommodates motor 3, establish planetary gear reducing mechanism 5 in the place ahead of this motor 3 in respectively, hit mechanism 6, percussion mechanism 7, make with the motor drive shaft 4 of motor 3 forwards outstanding at coaxial hammer anvil 8 with clutch mechanism.The 9th, the switch of the drive circuit of motor 3, the 10th, the trigger that switch 9 is connected by push.
Simultaneously shown in Fig. 2,3, planetary gear reducing mechanism 5, be accommodated in the inside of motor carriage 11 cylindraceous and gear-box cylindraceous 12, this motor carriage 11 is fixedly mounted in the body shell 2 and axle is supporting motor drive shaft 4, and this gear-box 12 is connected with the place ahead of this motor carriage 11 and encloses than this motor carriage 11 big one.That is, it has: be embedded in pinion on the motor drive shaft 4, rotatable 3 planetary gears 14,14 in first inside engaged gear 13; Support the carriage 15 of this planetary gear 14; With the output axial region engagement in the place ahead of this carriage 15, in second inside engaged gear 16 3 planetary gears 17,17 of rotatable next stage; Support the carriage 19 of this planetary gear 17, forms by the main shaft 18 that movably inserts on coaxial, divide two stages to slow down the rotation of motor drive shaft 4 in the back of hammer anvil 8, can be to main shaft 18 transmission.
Here, in motor carriage 11, supporting first inside engaged gear 13 by ball bearing 20 rotatable axles, shown in Fig. 5 B, keep the speed of this ball bearing 20 to switch ring (speed switching member) 21,23,23 and otch 24 of 2 gathering sills of utilization outstanding vertically 3 prominent bars 22,22 that are provided with and recessed setting accordingly in motor carriage 11 chimeric in its outside, under the confined state of rotation, can move forward and backward vertically.Speed switch in 3 prominent bars 22 of ring 21 with the chimeric prominent bar 22 of otch 24 on, brace 25 is to the outstanding setting of radiation direction, movably be inserted in the framework 26 of the rectangular shape on the outside that is arranged on motor carriage 11, these framework 26 outer being contained on the motor carriage 11, being vertical configuration with the speed switching handle 27 of ring-type is connected, this speed switch handle 27 with the progressive position of the back end in contact of gear-box 12 and with going-back position that the stage portion of the inner face that is arranged on body shell 2 contacts between the mode that can move forward and backward be provided with, switch the periphery of handle 27 in speed, except framework 26 parts, at the recessed groove 28 that is provided with of circumferencial direction.In addition, in framework 26, in front and back, be inserted with helical spring 29,29 with state across brace 25.
On the other hand, the periphery of gear-box 12 is provided with the outstanding circular-arc switch boards 31 that is provided with switching push button 30 in the above.As shown in Figure 4, this switch boards 31 is via above body shell 2 and along the window 32 of the rectangular shape of growing crosswise of left and right directions setting, switching push button 30 is exposed to the outside, and switching push button 30 is in window 32, in moving confined scope, can move along the circumferencial direction of gear-box 12.But, owing to be connected with the portion that retreats 33 that switching push button 30 can retreat at the left end of window 32, so, if switching push button 30 is slided in left end is drawn back portion 33, switch boards 31 is rearward moved.In addition, on switch boards 31, the baffle 34 of the thin plate that only makes the rectangular shape that switching push button 30 exposes is installed,,, realizes preventing the intrusion of dust etc. always can cover whole window 32 no matter at which sliding position all around of switching push button 30.
At the inner face of switch boards 31, outstanding be provided with the speed that is inserted into switch in the groove 28 of handle 27 in conjunction with projection 35, speed is switched handle 27 can follow switch boards 31 moving along fore-and-aft direction.Equally; it is the display board 36 of コ word shape that the plane is installed between body shell 2 and baffle 34; in its back-end and be formed on the below curved tabs 37; 37 are a pair of retaining piece 38 of L word shape on the plane that the speed that is formed at is switched the back, upper end of handle 27; each outside of 38 is by block; switching push button 30 can be chimeric at the left position of window 32; this display board 36 helps speed to switch being connected of handle 27 and switch boards 31; be positioned at the demonstration sheet 39 of the front and back of switching push button 30 simultaneously; 39 alternately expose in window 32 corresponding to the front and back position of switching push button 30, can discern the numeral that shows from the teeth outwards.
Thus, the left position operation switching push button 30 when at window 32 when switch boards 31 is moved forward and backward, switches handle 27 via speed, and speed switching ring 21 and first inside engaged gear 13 is being followed and moved forward and backward., switch the progressive position that encircles 21 and first inside engaged gear 13 in speed here, planetary gear 14 and the carriage 15 with the first order meshes simultaneously, and makes both combinations, and at going-back position, only with planetary gear 14 engagements, releasing combines with carriage 15.Rear end periphery at first inside engaged gear 13, engaging tooth 40,40 is in a circumferential direction with uniformly-spaced outstanding setting, at the back-end location of first inside engaged gear 13, engage with the engaging tooth 41,41 of giving prominence to setting in the bottom surface of motor carriage 11, limit the rotation of first inside engaged gear 13.Therefore, going-back position at first inside engaged gear 13, the rotation of the motor drive shaft 4 of motor 3 is slowed down and transmission to carriage 15 by the planetary gear 14 of revolution in first inside engaged gear 13, become the low-speed mode that carries out two stage deceleration by planetary gear reducing mechanism 5, at the progressive position of first inside engaged gear 13, the fast mode that the rotation that becomes motor drive shaft 4 is directly transmitted to carriage 15.
At this moment, display board 36, progressive position at switching push button 30, the demonstration sheet 39 at rear is exposed in the portion that retreats 33 of window 32, and the numeral " 2 " of demonstration expression fast mode, at the going-back position of switching push button 30, the demonstration sheet 39 in the place ahead is exposed in window 32, and show the numeral " 1 " of expression low-speed mode.In addition, when 13 slips of first inside engaged gear, during with carriage 15 and engaging tooth 41 engagements, even the position of mutual tooth is improper, handover operation itself because switching handle 27, speed can move to suitable position, so always can successfully carry out by the strain of helical spring 29,29.Because the loading former state of helical spring 29,29 is continuing, so the suitable position of engagement when motor drive shaft 4 rotations, first inside engaged gear 13 and speed are switched ring 21 and are slided to suitable front and back position.
In addition, second inside engaged gear 16 also with the ball bearing 42 of the bracket part 19 of retainer shaft supporting spindle 18 and in gear-box 12 rotatable mode be provided with, in its front, the front-back of circumferencial direction becomes the engaging protrusion 43,43 on inclined plane along the circumferential direction with uniformly-spaced outstanding setting.The place ahead at second inside engaged gear 16, by axial prominent bar 45,45 and chimeric at the not shown groove of gear-box 12 inner faces recessed setting of pressure ring 44 by being formed on its outside, the rotation confined state under with along circumferentially movably mode be received, relative with second inside engaged gear 16 to the back, the identical shaped engaging protrusion 46,46 that can engage with engaging protrusion 43,43 is along the circumferential direction with outstanding setting the uniformly-spaced.On the other hand, dispose the helical spring 50 of accepting its front end by pair of push rods 47,47 in the place ahead, can will rearward load by pressure ring 44 by pressure ring 44.This push rod the 47, the 47th is that the center is the point symmetry setting with the axle center towards the lateral surface of gear-box 12, make to the plate body of the outstanding retaining piece 48,48 that is provided with of inner face in gear-box 12, giving prominence to, these retaining piece 48,48 front ends via packing ring 52 receiving auger springs 50 by the opening 51,51 that is formed on the gear-box 12.Outside at push rod 47,47 is formed with convex thread portion 49 respectively.
Therefore, second inside engaged gear 16 by becoming press device helical spring 50 and be pressed by pressure ring 44 and fixedly limit its rotation.The place ahead in body shell 2, conversion ring 53 at the tubular that has formed recessed screw thread interior week is housed outside rotatably on gear-box 12, and screw togather with the convex thread 49 of push rod 47,47, thereby when rotary manipulation by conversion ring 53, when making push rod 47,47 rotate screw thread vertically to move, make helical spring 50 flexible vertically, can change pressing the loading force of pressure ring 44.In the front end periphery of gear-box 12, leaf spring 54 in embedding, engages with the tooth 55,55 in week in the front end that is formed on conversion ring 53, when the rotary manipulation of conversion ring 53, obtains the ratchet effect.The 56th, screw at the place ahead and gear-box 12 screw threads of conversion ring 53 be fixed, hammer shell and the body shell 2 and the conversion ring 53 common formation housing of the present invention of axle supporting hammer anvil 8.In the place ahead part of hammer shell 53, the buffer 114 of rubber system with the ring-type embedding, when covering in screw thread, prevent the damage of the machined material that the contact by the front part of impact type screwdriver 1 causes.
On the other hand, as shown in Figure 6A, periphery at second inside engaged gear 16, by giving prominence to the prominent bar 58 that is provided with vertically in periphery, 58 with at the groove 59 of the recessed setting of the rear end of gear-box 12 inner face, 59 chimeric, the clutch that rotates confined ring-type switches handle (clutch switching member) 57 to be adorned outward with the form that can move forward and backward vertically, switch the progressive position of handle 57 at clutch, all within it engaging tooths 60 that is provided with, 60 with the engaging tooth 61 that is provided with in the rear of second inside engaged gear 16 periphery, 61 engagings, although the loading force of helical spring 50 is arranged, can limit the rotation of second inside engaged gear 16.In the outside that clutch switches handle 57, a pair of connection projection 62,62 that becomes connector is provided with so that point symmetry position is outstanding towards the radiation direction, connects the otch 63,63 as limiting groove that forms vertically at gear-box 12, and is outstanding to the outside of gear-box 12.
In the periphery of gear-box 12, the rotatably outer a-b box 64 that is equipped with than half tubular of gear-box 12 big circles.This a-b box 64 in the chimeric switch boards 31 of the notch portion of rear end, follows that switch boards 31 slip along the circumferential direction forms integratedly rotation and switch boards 31 forms common switching member together.Rear end part at a-b box 64 forms a pair of clutch switching groove 65,65 at point symmetry position, switches groove 65,65 at this clutch and inserts the connection projection 62 that clutch switches handle 57 respectively.Shown in Fig. 5 A, each clutch switch groove 65 by along first groove 66 of the circumferencial direction of a-b box 64, be positioned at second groove 67, form by the tipper 68 that connects first groove 66 and second groove 67 from the same circumferencial direction at these first groove, 66 predetermined distance rears, rotation along with a-b box 64, make and utilize the otch 63 restrictions connection projection 62 that moves along the circumferential direction in clutch switches groove 65, to relatively move, thereby can be via connecting projection 62, make clutch switch handle 57 and move forward and backward from the outside., connect projection 62 under the state that is positioned at first groove 66 here, become the progressive position (first sliding position) that clutch switches handle 57, under the state that is positioned at second groove 67, become the going-back position (second sliding position) that clutch switches handle 57.
Hitting mechanism 6 has: the little tube 12a of portion and 56 hammer anvils that supporting 8 of hammer shell of being set at the front end of gear-box 12 via ball bearing 69,69; To the back of this hammer anvil 8 with the coaxial main shaft 18 that movably inserts; Be contained in the hammer 70 on the main shaft 18 outward; Accept the rear end and will hammer 70 helical springs 72 that forwards load into shape by the cup-shaped packing ring 71 that is installed on the main shaft 18.Shown in Fig. 6 B, hammer 70 forms the pair of cams groove 73,73 of V word shape and 2 steel balls 75,75 of chimeric insertion across the link slot 74,74 that forms vertically at the inner peripheral surface of hammering 70 into shape by the outer peripheral face at main shaft 18, when being connected with main shaft 18, utilize helical spring 72, the progressive position of steel ball 75 quilts to the rear end of front end that is positioned at cam path 73 (front end of V word) and link slot 74 loads.Front at hammer 70, outstanding be provided with a pair of engaging pawl 77,77 that a pair of arm that can be radial extension setting with the rear end towards hammer anvil 8 is 76,76 that engage, the place ahead is seen as fan shape, progressive position at hammer shown in Figure 1 70, engaging pawl 77,77 and arm 76,76 engagings make the rotation of hammer 70 and hammer anvil 8 one.
On hammer 70, by opposite side distance from chimeric, the subring 78 that becomes the decontrol that hits mechanism 6 is to be adorned outward with the rotation of hammer 70 one and the mode that can move separately vertically.In the front of this subring 78, outstanding being provided with along the periphery of the engaging pawl 77,77 of hammer 70 is the circular-arc auxiliary jaw 79,79 that continuous shape connects, and at progressive position, is engaged to arm 76,76 with the engaging pawl 77,77 of hammer 70.In addition, in the periphery of subring 78, the along the circumferential direction recessed groove 80 that is provided with.On the other hand, at a-b box 64, in the pair of notches (limiting groove) 81,81 that forms vertically, accommodate the square guide way (impact switching member) 82,82 of cylindrical shell 82a in central embedding in the mode that can move forward and backward.Shown in Fig. 5 A and Fig. 6 B, be embedded in the impact that pin with the level (connector) 83 breakthrough forms among the cylindrical shell 82a of each guide way 82 are formed in gear-box 12 and switch groove 84,84, front end movably is inserted in the groove 80 of subring 78.
This impact is switched groove 84 and is formed by first groove 85 that forms on the circumferencial direction of gear-box 12 with at second groove 86 that rearward bends to V word shape midway of first groove 85, be accompanied by the rotation of a-b box 64, with the guide way 82,82 that moves along the circumferential direction of restriction in otch 81 pin 83,83 with the level is moved in impacting switching groove 84,84, thereby, subring 78 is moved forward and backward from the outside via pin 83 with the level.Here, pin 83 with the level obtains the progressive position of subring 78 at the progressive position (first sliding position) of the guide way 82 that is positioned at first groove 85, obtains the going-back position of subring 78 at the going-back position (second sliding position) of the guide way 82 of the front end of the V word shape that is positioned at second groove 86.In addition, in impacting switching groove 84, the cylindrical shell 82a that adorns the guide way 82 of the state on the pin 83 with the level outside slides.The dual structure that becomes this cylindrical shell 82a and pin with the level 83 is the intensity in order to ensure pin 83 with the level, positively carries out slip and subring 78 mobile of pin 83 with the level in impact switching groove 84.
Be located in the percussion mechanism 7 in the hammer shell 56.Percussion mechanism 7 has: first cam 87, and it is embedded in hammer anvil 8 in 69,69 one of ball bearing; Second cam 90, its first cam, 87 rears separately by outside install on the main shaft 8, be limited rearward move by ball 88,88 and flat gaskets 89; Handle (vibrations switching member) 93 is switched in the vibrations of ring-type, it is at the rear of second cam 90, be in the little tube 12a of portion of gear-box 12, and front end have can with the block tooth 92,92 of block tooth 91,91 engagements that form in the periphery of second cam 90, on face, form respectively with the intermeshing cam tooth 94,95 of contact condition the reciprocally relative of first cam 87 and second cam 90.The decontrol that handle 93 becomes percussion mechanism 7 is switched in this second cam 90 and vibrations.
Shown in Fig. 6 C, vibrations are switched handle 93 and are being arranged on the projection 96,96 on the periphery and limit in the recess 97,97 of the inner face setting of the little tube 12a of portion chimeric under the state of its rotation by outstanding, can remain in the little tube 12a of portion and can move forward and backward, make in a pair of connection projection (connector) 98,98 that equally is radial outstanding setting between the projection 96,96 and connect the otch (limiting groove) 99,99 that on the little tube 12a of portion, is provided with, movably be inserted in a pair of circular-arc guide plate 100,100 of the outstanding setting of front end of a-b box 64 to periphery.As shown in Figure 7, be formed with by switching groove 101 in the part of movably inserting of the connection projection 98 of each guide plate 100 along first groove 102 of the circumferencial direction of a-b box 64 with in the vibrations that second groove 103 that forwards bends to trapezoidal shape midway of this first groove 102 constitutes, rotation along with a-b box 64, the connection projection 98,98 that moves that limits in otch 99 along the circumferential direction in switching groove 101,101, is relatively moved in vibrations, thereby, can make vibrations switch handle 93 and move forward and backward from the outside via connecting projection 98.Here, connect projection 98 and under the state that is arranged in first groove 102, obtain shaking the going-back position (first sliding position) that switches handle 93, under the state of the trapezoidal front end that is positioned at second groove 103, obtain shaking the progressive position (second sliding position) that switches handle 93.
In addition,,,, guarantee to shake the intensity of switching groove 101 here so form the part that comprises second groove, 103 trailing edges of guide plate 100 respectively separately with the plate 104,104 of steel because a-b box 64 is plastic.
Below, the position of rotation of a-b box 64 of the operation of following switching push button 30 and the pattern that thereupon obtains are described.
At first, as shown in Figure 7, (upside of Fig. 4 describes as the front with hammer anvil 8 sides switching push button 30 at the left end of window 32.Below identical) first position of rotation of the a-b box that becomes primary importance 64, switch in the groove 65 at clutch, make connection projection 62 that clutch switches handle 57 be positioned at the right-hand member of first groove 66.Therefore, clutch switches handle 57 and is in progressive position, limits the rotation of second inside engaged gear 16.In addition, in impacting switching groove 84, make pin 83 with the level be positioned at the left end of first groove 85.Therefore, subring 78 is in progressive position, engages with arm 76.And then, switch in the groove 101 in vibrations, make to connect the right-hand member that projection 98 is positioned at first groove 102.Therefore, vibrations are switched handle 93 and are in going-back position, leave from second cam 90.
Therefore,, become second inside engaged gear 16 drill mode that hammer anvil 8 rotates via subring 78 and main shaft 18 one by the 57 direct prevention idle running of clutch switching handle here.At this moment, because second cam 90 is for rotating freely, so do not shake even contact also with first cam 87.
Below, as shown in Figure 8, move to second position of rotation of a-b box 64 on only about 1/3rd right sides of window 32 side-to-side dimensions from primary importance at switching push button 30, switch in groove 65 and the vibrations switching groove 101 at clutch, because it is constant respectively and be in first groove 66,102 to link projection 62,98, so clutch switches the progressive position of handle 57, going-back position that handle 93 is switched in vibrations is constant., in impact switching groove 84, pin 83 with the level enters in second groove 86 and moves to the front end of V word shape.Therefore, subring 78 retreats and leaves from arm 76.
Therefore, the second place at this switching push button 30, how second inside engaged gear 16 no matter stop idle running to the load of hammer anvil 8, though second cam 90 also rotates freely and do not shake, becomes main shaft 18 and hammer anvil 8 via hammering 70 and the conflicting model that is connected into shape.
Below, as shown in Figure 9, move to the 3rd position of rotation of a-b box 64 on only about 1/3rd right sides of window 32 side-to-side dimensions equally from the second place at switching push button 30, switch in the groove 65 at clutch, it is constant and be in first groove 66 to connect projection 62., in impacting switching groove 84, pin 83 with the level enters in first groove 85 once more, makes subring 78 move to progressive position.In addition, switch in the groove 101, connect projection 98 and enter in second groove 103, move to trapezoidal front end in vibrations.Therefore, vibrations are switched handle 93 and are advanced, and limit the rotation of second cam 90.
Therefore, in the 3rd position of this switching push button 30, how second inside engaged gear 16 no matter stop idle running, hammer anvil 8 and the rotation of main shaft 18 one to the load of hammer anvil 8.But hammer anvil 8 the front of arm 76,76 with outside be contained on the hammer anvil 8 and remain on progressive position that the nylon washer 105 on the little tube 12a of portion of gear-box 12 contacts and the back of arm 76,76 and going-back position that the stage portion of main shaft 18 front ends contacts between be received in mode along the fore-and-aft direction fine motion, so, become the vibrations drill mode that contacts with second cam 90 that is limited to rotate by vibrations switching handle 93 with first cam 87 that hammer anvil 8 rotates together at the going-back position of hammer anvil 8.
And, as shown in figure 10, be positioned at the 4th position of rotation of a-b box 64 of the right-hand member of window 32 at switching push button 30, switch in the groove 65 at clutch, connect the guiding of projection 62 by tipper 68 and move in second groove 67, make clutch switch handle 57 and retreat.In addition, in impacting switching groove 84, because pin with the level 83 is positioned at the right-hand member of first groove 85, so the progressive position of subring 78 is constant., switch in the groove 101, connect projection 98 and retreat once more, move to the left end of first groove 102 from second groove 103 in vibrations.Therefore, vibrations are switched handle 93 and are retreated, and leave from second cam 90.
Therefore, the 4th position at this switching push button 30, hammer anvil 8 and the rotation of main shaft 18 one, do not produce strike, second cam 90 does not produce vibrations yet under the state that rotates freely, but, become the clutch mode of only fixing second inside engaged gear 16 by the loading force of helical spring 50 because clutch switches retreating of handle 57.
In addition, shown in Fig. 3 and Fig. 6 A, steel ball 106 and helical spring 107 are contained in the switching push button 30 together, steel ball 106 are given prominence to loading to the back side of switch boards 31.Outer peripheral face at gear-box 12, recessed 4 the position corresponding concave part 108,108 that are provided with above-mentioned switching push button 30 of two row in front and back, so when the slide of switching push button 30, obtain the ratchet effect corresponding with each pattern position and speed switching position.
On the other hand, chuck cover (チ ャ Star Network ス リ one Block) 109 according to the stroke mode that can move forward and backward vertically with regulation be contained in outward hammer anvil 8 the front end periphery, by outside its place ahead, being contained in the helical spring 110 on the hammer anvil 8, load to the going-back position that contacts with the interior wheel of the ball bearing 69 in the place ahead.At this going-back position, the interior week of chuck cover 109 the outstanding prominent bar 111 that is provided with will be hammer anvil 8 in push to center axis to radiating the ball 112,112 that direction with the mode interpolation that can move forward and backward as pressing member, and outstanding in the cross section in the axle center that is arranged on hammer anvil 8 is hexagonal plug-in opening 113, only pull out the not shown drill bit that fixedly is inserted in the plug-in opening 113.When forwards sliding, because removed pushing of 111 pairs of steel balls 112 of prominent bar, so drill bit can insert or disengaging to plug-in opening 113 when the loading that makes chuck cover 109 opposing helical springs 110.
Particularly here, contact with ball bearing 69 by the chuck cover that rearward loads 109, in the normal state, hammer anvil 8 is in progressive position by the loading of helical spring 110, and first cam 87 and second cam 90 are maintained contactless state.When pushing when hammer anvil 8 is retreated to screw head etc. at the drill bit of installing on the hammer anvil 8, the cam tooth 94,95 of first cam 87 and second cam 90 contacts with each other.
In addition, constant to the pressed state of ball 112 with chuck cover 109 relative the advancing of ball bearing 69 contact, but because forward travel distance is very little by retreating of hammer anvil 8, so it is fixing to keep only pulling out of drill bit.
As in the impact type screwdriver 1 of above formation, at first, switching push button 30 is operated primary importance, select the drill mode of Fig. 7, under this state, to operate when pressing trigger 10, when making switch 9 for connection, motor 3 drives, and motor drive shaft 4 rotates.So the rotation of motor drive shaft 4 is decelerated by planetary gear reducing mechanism 5 ears, passes to main shaft 18.Main shaft 18 is connected with hammer anvil 8 by hammering 70 subrings 78 of adding progressive position into shape, so hammer anvil 8 always rotates with main shaft 18 one, does not produce impact in hitting mechanism 6.In addition, even in percussion mechanism 7, be freely because handle 93 is switched in vibrations, so also do not produce vibrations even hammer anvil 8 retreats.Therefore, can carry out the perforation operation of the drill bit installed at hammer anvil 8 etc.At this moment, as mentioned above, second inside engaged gear 16 switches handle 57 by clutch and limits its rotation, thus clutch mechanism do not work, no matter to the load of hammer anvil 8 how, hammer anvil 8 continues rotation.
Then, switching push button 30 is operated the second place, select the conflicting model of Fig. 8, when making switch 9 for connection, the rotation of main shaft 18 passes to hammer anvil 8 via hammer 70.Therefore, carry out screw thread when tightening by insert the crewdriver attachment point of installing at hammer anvil 8, when the load of hammer anvil 8 is increased, steel ball 75,75 is rearward rotated along the cam path 73,73 of main shaft 18, resist the loading of helical spring 72 simultaneously and hammer 70 into shape and retreat, leave from the arm 76,76 of hammer anvil 8., from the moment that arm 76,76 leaves, rotate together with main shaft 18 again and advance, make engaging pawl 77,77 be sticked in arm 76,76 again by the loading of helical spring 72 at engaging pawl 77,77.By carrying out the disengaging and the engaging of 70 pairs of hammer anvils 8 of this hammer repeatedly, hammer anvil 8 is produced along the intermittent strike of direction of rotation (impact), tighten.Do not produce vibrations this moment in percussion mechanism 7, by fixing of second inside engaged gear 16, clutch mechanism is not worked yet yet.
Then, switching push button 30 is operated the 3rd position, select the vibrations drill mode of Fig. 9, when switch 9 was connected, hammer 70 was connected by subring 78 with hammer anvil 8, so do not produce impact in strike mechanism 6, by fixing of second inside engaged gear 16, clutch mechanism is not worked yet.; at percussion mechanism 7; because second cam 90 utilizes vibrations to switch handle 93 and the restriction rotation; so when pressing drill bit etc. hammer anvil 8 retreated; contact with second cam 90 with first cam 87 of hammer anvil 8 one rotation; by the interference between the cam tooth 94,95, produce vibrations vertically at hammer anvil 8.
Then, switching push button 30 is operated the 4th position, select clutch mode, when switch 9 was connected, hammer 70 and hammer anvil 8 were constant by the connection status of subring 78, and mechanism 6 does not produce impact in strike.In addition, because second cam 90 also is freely, so, also do not produce vibrations at percussion mechanism 7 even hammer anvil 8 retreats.But, in planetary gear reducing mechanism 5, because removed the rotation restriction that clutch switches 57 pairs second inside engaged gears 16 of handle, so tighten when carrying out screw thread, and when the load of hammer anvil 8 and main shaft 18 surpassed the pressing force of helical spring 50, the engaging protrusion 43 of second inside engaged gear 16 will be by pressure ring 44 the place aheads by extruding, and surpass engaging protrusion 46, thereby 16 idle running of second inside engaged gear, screw thread is tightened end.This clutch action torque changes the decrement of helical spring 50 by the rotary manipulation of conversion ring 53, thereby can adjust.
In addition, in above-mentioned each pattern, as mentioned above, usually pass through the guiding of the switching push button 30 of window 32, switch boards 31 position forwardly horizontally slips, so first inside engaged gear 13 and speed are switched ring 21 and are in progressive position together under free rotation state, hammer anvil 8 rotations under the fast mode that makes planetary gear 14 and carriage 15 combinations.
On the other hand, if only in the primary importance of drill mode switching push button 30 is retreated, first inside engaged gear 13 and speed are switched ring 21 and are retreated simultaneously and limit rotation, only and planetary gear 14 mesh.Therefore, hammer anvil 8 rotations under low-speed mode.That is, only when drill mode, can carry out the high speed of hammer anvil 8, the switching of low speed.
Like this, impact type screwdriver 1 according to above-mentioned embodiment, in housing, be provided with the switch boards 31 and the a-b box 64 that switch with clutch that handle 57 and guide way 82 engages simultaneously and can change the combination of each sliding position by clutch switching handle 57 and guide way 82 being moved to the position of rotation of regulation mobile, by utilize switching push button 30 to make this switch boards 31 and a-b box 64 be rotated operation from hull outside, can select conflicting model respectively, clutch mode, drill mode, thus only just can select all patterns with the operation of 1 switching push button 30.Therefore, the anxiety of no maloperation, and operability and reliability are good.
In addition, here, vibrations that switching undertaken by percussion mechanism 7 are set to be given and handle 93 is switched in the vibrations of its releasing, it is engaged with a-b box 64, make up the sliding position that handle 93 is switched in vibrations by the rotary manipulation that utilizes a-b box 64, thereby can also further select the vibrations drill mode, so even increased the vibrations drill mode, operability is also constant, can keep good operating position.
And then, make speed switch ring 21 via speed switch handle 27 indirect be engaged to switch boards 31, the operation that moves forward and backward by switch boards 31, group speed switches the sliding position of ring 21, also can carry out switching in the speed of drill mode, also can carry out simultaneously so utilize switching push button 30 speed to switch, can expect further to improve operating position.
And, form common switching member by a-b box 64, make moving according to each switching member of this a-b box 64, by being arranged on either party otch 63 of a direction of gear-box 12 or a-b box 64,89,99, be arranged on the switching groove 65 on the opposing party, 84,101, be arranged on any one party of a-b box 64 or switching member and connection projection 62 that the guiding of the switching groove of rotation by being accompanied by a-b box 64 is slided switching member, 98 and pin with the level 83 and carrying out respectively, so each switching member easily can be directed to sliding position reliably.
And, according to above-mentioned impact type screwdriver 1, when the loading direction of the 110 pairs of chucks of helical spring cover 109 is set in the rear, sliding position at its rear makes chuck cover 109 contact with the ball bearing 69 of main body side, thereby utilize helical spring 110 that hammer anvil 8 advanced position are loaded, thereby can be only carry out the draw back loading of position of the loading of hammer anvil 8 advanced position and chuck cover 109, become the few and rational structure of components number by 1 helical spring 110 that is arranged on chuck cover 109.Therefore, the time decreased of assembling can reduce manufacturing cost.
In addition, the shape of switching member and common switching member, limiting groove and switching groove, connector etc. etc. is not limited to aforesaid way, can carry out various designs changes, the switching groove that for example will be arranged on the limiting groove of gear-box and be arranged on a-b box is arranged on the opposition side of aforesaid way, perhaps make the V font that switches groove and trapezoidal outstanding side opposite, change the glide direction of switching member etc.Particularly switching member and common switching member can directly not engage yet, but the engaging indirectly via other members, switching member also can form with a plurality of members.
In addition, strike mechanism is not limited to hammer and the engaging of hammer anvil and the structure of disengaging of picture aforesaid way, even used the speed difference of the main shaft of the case that utilizes input side and outlet side, by being formed on the pressure of the grease chamber in the case, produce the strike mechanism of intermittence along direction of rotation to the known oily unit of main shaft strike, as long as have the one of a-b box and output shaft and the decontrol that hits of split, just can utilize common switching member of the present invention that this switching member is moved.
And then, in aforesaid way, describe with the impact type screwdriver that can select drill mode, conflicting model, vibrations drill mode, 4 patterns of clutch mode, but these 4 patterns are not essential, so long as can select the electric tool of conflicting model, clutch mode and drill mode at least, or can select the electric tool of conflicting model, drill mode and vibrations drill mode to get final product at least, also can adopt other electric tool.Therefore, if the former electric tool, the vibrations drill mode is optional, if the latter's electric tool, clutch mode is optional.
On the other hand, in aforesaid way, only when drill mode, switching push button is retreated, obtain low-speed mode, but in other part or all of pattern, switching push button is retreated, can carry out low speed and switching at a high speed.In addition, the switching of speed is obtained by the front and back position of the speed switching member that causes in the operation of the front and back of switch boards, if switch but only in the pattern of a part, carry out speed, identical with other the situation of pattern, the limiting groove of any one party by being arranged on gear-box or a-b box, be arranged on the opposing party the switching groove, be arranged on the connector of any one party of gear-box or a-b box, also can realize the slip of speed switching member.
Certainly, even there is not the electric tool of this speed switching mechanism, the present invention also can be suitable for, still, do not need this moment to form common switching member with the a-b box of switch boards that can move forward and backward and only rotation, enough with the member that switch boards and a-b box are become one.
And, the charger of chuck cover is except helical spring, also can be by other members such as leaf spring and elastomer and constituting of these, be not limited to ball bearing with the contacting of case side of chuck cover, even other the place at hammer shell and packing ring etc. does not also hinder, pressing member also can adopt roller except ball.
Claims (2)
1. an electric tool is characterized in that, comprising:
Housing;
Motor;
Output shaft, its driving by said motor is rotated, outstanding setting of axial mode with fine motion forwards, backwards, and the plug-in opening that has tool heads at front end;
Percussion mechanism, it is arranged in the above-mentioned housing, can above-mentioned output shaft be given to axial vibrations at the going-back position of above-mentioned output shaft;
Pressing member, its in above-mentioned output shaft with its radiation direction on movably mode be provided with;
The chuck cover, its the front end of above-mentioned output shaft according to the stroke of regulation to the mode that axially can move forward and backward and utilize charger forwards, backwards the sliding position of any one party load and be provided with, at above-mentioned sliding position above-mentioned pressing member is pushed to the center axis of above-mentioned output shaft, can only pull out the tool heads that fixedly is inserted in the above-mentioned plug-in opening
Above-mentioned charger is set at the rear to the loading direction that above-mentioned chuck overlaps, the slip that causes by the loading that utilizes to this rear makes above-mentioned chuck cover contact with above-mentioned case side, thereby can make above-mentioned output shaft advanced position loading by above-mentioned charger.
2. electric tool as claimed in claim 1 is characterized in that pressing member is a ball.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004314598 | 2004-10-28 | ||
| JP2004314599A JP4391921B2 (en) | 2004-10-28 | 2004-10-28 | Vibration drill |
| JP2004314599 | 2004-10-28 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101142890A Division CN100354074C (en) | 2004-10-28 | 2005-10-21 | Electric power tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101143440A true CN101143440A (en) | 2008-03-19 |
| CN100544897C CN100544897C (en) | 2009-09-30 |
Family
ID=36718294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101626648A Active CN100544897C (en) | 2004-10-28 | 2005-10-21 | Electric tool |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4391921B2 (en) |
| CN (1) | CN100544897C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102470517A (en) * | 2009-07-21 | 2012-05-23 | 株式会社牧田 | Hammering tool |
| CN103009343A (en) * | 2012-11-29 | 2013-04-03 | 南京德朔实业有限公司 | Electric power tool |
| CN103932779A (en) * | 2014-01-28 | 2014-07-23 | 重庆西山科技有限公司 | Screw driving device with continuous and adjustable torque |
| CN104440802A (en) * | 2013-09-18 | 2015-03-25 | 罗伯特·博世有限公司 | Handheld tool machine |
| CN106826699A (en) * | 2015-12-03 | 2017-06-13 | 株式会社牧田 | Electric tool with vibrating mechanism |
| CN113752219A (en) * | 2020-06-02 | 2021-12-07 | 施耐宝公司 | Direction selector mechanism for power tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2722131B1 (en) | 2007-06-15 | 2016-07-20 | Black & Decker Inc. | Hybrid impact tool |
| US9193053B2 (en) | 2008-09-25 | 2015-11-24 | Black & Decker Inc. | Hybrid impact tool |
| US8251158B2 (en) | 2008-11-08 | 2012-08-28 | Black & Decker Inc. | Multi-speed power tool transmission with alternative ring gear configuration |
| JP4674640B2 (en) * | 2009-01-27 | 2011-04-20 | パナソニック電工株式会社 | Impact rotary tool |
| US8631880B2 (en) | 2009-04-30 | 2014-01-21 | Black & Decker Inc. | Power tool with impact mechanism |
| US8460153B2 (en) | 2009-12-23 | 2013-06-11 | Black & Decker Inc. | Hybrid impact tool with two-speed transmission |
| US8584770B2 (en) | 2010-03-23 | 2013-11-19 | Black & Decker Inc. | Spindle bearing arrangement for a power tool |
| JP5075233B2 (en) * | 2010-07-29 | 2012-11-21 | パナソニックＥｓパワーツール株式会社 | Electric tool |
| US8674640B2 (en) | 2011-01-05 | 2014-03-18 | Makita Corporation | Electric power tool |
| JP5921325B2 (en) * | 2012-05-11 | 2016-05-24 | 株式会社マキタ | Electric tool |
| CN104070490B (en) * | 2013-03-29 | 2016-11-23 | 南京德朔实业有限公司 | Electric tool |
-
2004
- 2004-10-28 JP JP2004314599A patent/JP4391921B2/en not_active Expired - Fee Related
-
2005
- 2005-10-21 CN CNB2007101626648A patent/CN100544897C/en active Active
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102470517A (en) * | 2009-07-21 | 2012-05-23 | 株式会社牧田 | Hammering tool |
| CN102470517B (en) * | 2009-07-21 | 2014-09-03 | 株式会社牧田 | Hammering tool |
| CN103009343A (en) * | 2012-11-29 | 2013-04-03 | 南京德朔实业有限公司 | Electric power tool |
| CN103009343B (en) * | 2012-11-29 | 2016-04-27 | 南京德朔实业有限公司 | Electric tool |
| CN104440802A (en) * | 2013-09-18 | 2015-03-25 | 罗伯特·博世有限公司 | Handheld tool machine |
| CN104440802B (en) * | 2013-09-18 | 2019-05-07 | 罗伯特·博世有限公司 | Hand held power machine |
| CN103932779A (en) * | 2014-01-28 | 2014-07-23 | 重庆西山科技有限公司 | Screw driving device with continuous and adjustable torque |
| CN103932779B (en) * | 2014-01-28 | 2016-09-07 | 重庆西山科技股份有限公司 | The continuously adjustable screw driving device of moment of torsion |
| CN106826699A (en) * | 2015-12-03 | 2017-06-13 | 株式会社牧田 | Electric tool with vibrating mechanism |
| CN113752219A (en) * | 2020-06-02 | 2021-12-07 | 施耐宝公司 | Direction selector mechanism for power tool |
| CN113752219B (en) * | 2020-06-02 | 2024-04-30 | 施耐宝公司 | Direction selector mechanism for power tool |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2006123081A (en) | 2006-05-18 |
| JP4391921B2 (en) | 2009-12-24 |
| CN100544897C (en) | 2009-09-30 |
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