CN102335904B - Power tool - Google Patents
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- CN102335904B CN102335904B CN201010239517.8A CN201010239517A CN102335904B CN 102335904 B CN102335904 B CN 102335904B CN 201010239517 A CN201010239517 A CN 201010239517A CN 102335904 B CN102335904 B CN 102335904B
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Abstract
The invention relates to a power tool. The power tool comprises a shell, a motor, a planetary gear deceleration system, a power output system, a switching window, and a function switching button; the motor is positioned in the shell and is provided with an output shaft which provides rotary output; the planetary gear deceleration system decelerates the rotary output of the output shaft and then performs rotary output; the power output system transfers the rotary output of the planetary gear deceleration system to a work head; the switching window is positioned on the shell; and at least one part of the function switching button is accommodated in the switching window, and the function switching button moves in the switching window to select an impact wrench function, a high-speed drilling function, a low-speed drilling function and a screwdriver function for the power tool. The function switching button can slide on the shell to realize speed regulation, and the impact wrench function can be switched, so that operation convenience is improved.
Description
Technical field
The present invention relates to a kind of power tool, especially a kind of power tool that can switch between several functions.
Background technology
In existing drill gun class power tool, generally include electric drill, electric screwdriver, percussion drill, impact wrench etc.
Electric screwdriver be for by screw-driving to workpiece.It generally includes safety clutch structure, and this clutch consists of clutch driving link and driven member, and driving link and reduction gearing are integrated, and driven member rotation is fixed in casing and can moves axially with respect to casing.One working spring acts on the end-tooth of driving link by driven member, driving link is fixed in direction of rotation and then can be made screwdriver rotation by transmitting torque.During operation, the torque of motor is delivered to screwdriver by planetary gear reducing mechanism, makes it rotation, and driver bit and head of screw groove coordinate, thereby screw is tightened rapidly.Along with screw-driving, the moment of resistance being subject on driving link increases sharply, and produce an axial thrust by end tooth, when the moment of resistance exceedes after dropout preset value, this axial thrust forces driven member further compression work spring and departing from driving link forward, after losing the support of driven member, driving link is driven in rotation, thereby planetary gear reducing mechanism no-output, driving link also has the trend of rotating with motor output shaft, engagement again under the restoring force effect of working spring subsequently, so go round and begin again, screw is no longer subject to torsional interaction, and motor is still rotating.By this structure, the screw of tightening had both reached regulation pulling force, again can be by drawing crack, and motor can not produce overload, stall yet, damages or burn.
Percussion drill is mainly used for punching on the workpiece of fragile material, and it has percussion mechanism, and moving cam and quiet cam that this percussion mechanism has canine tooth shape tooth by opposing end surface form.Moving cam is arranged on output shaft middle part, and quiet cam is fixed on casing, is provided with spring and is used for making both to be separated from each other between dynamic and static cam.While carrying out percussive drilling, drill bit is vertically pressed onto on surface of the work, and is axially applying suitable pressure, the elastic force that overcomes like this spring makes dynamic and static cam intermeshing, starter motor, and the torque of motor is arrived output shaft by dynamic and static gear transmission.Output shaft can, to producing an axial thrust backward with the relatively-stationary quiet cam of casing, make to move after percussion drill in rotary course, when moving cam forwards engaging tooth drop out of gear to, moves the distance of a tooth depth after percussion drill.Drop out of gear is instantaneous, due to the additional axial force continuing, makes quiet cam impact rapidly moving cam with percussion drill, thereby surface of the work is produced to powerful impulsive force.So go round and begin again, just produced the compound motion that lasting rotation adds impact.Fragile material is broken under brute force is repeatedly impacted, and along with the rotation of drill bit, chip is discharged by drill groove, so get hole on masonry, concrete component.
Impact wrench is mainly used for fastening bolt.It has initiatively impact block, passive impact block etc., initiatively impact block is rotarilyd actuate by the output shaft of gear reduction, passive impact block, can engage and be driven in rotation with active impact block, passive impact block is located on working shaft and rotarilys actuate working shaft, wherein said active impact block selectively departs from and engages with passive impact block when the suffered load of working shaft increases to particular value, and then again engage with passive impact block again, thereby in direction of rotation, working shaft is imposed to intermittent impact under the rotary actuation of output shaft
Electric drill is for holing on workpiece, and in operation process, auger spindle rotates constantly.Conventionally, user need to carry out dissimilar operation when carrying out operation, as the turn of the screw, stubborn bolt, boring etc.So, need user to prepare the electric tool of number of different types, also will constantly more bring and operate and will bother very much.
U.S. Pat 6,142,242 (calling patent ' 242 patents in the following text) have been disclosed a kind of power tool of selecting to realize electric drill, electric screw driver and percussion drill.This electric tool has a function switching device, by rotating this element to different circumferential positions, can correspondingly realize the function of electric drill, electric screw driver and percussion drill.Wherein, realizing in the mechanism that electric screw driver and other functions switch, in casing, be provided with axially extended confinement block, it can prop up clutch driven member and clutch driving link cannot be driven in rotation, and is provided with the projection that can axially coordinate with this confinement block in function switching device.When realizing electric drill or percussion drill function, the projection in function switching device coordinates with confinement block and makes confinement block prop up clutch driven member; When realizing electric screw driver function, the projection in function switching device and confinement block depart from and coordinate, thereby clutch driving link can be driven in rotation and realize clutch function.U.S. Pat 6,457,535B1 (calling patent ' 535 patents in the following text) has disclosed similar clutch switching construction, by moving axially the clutch function limiting element of casing inside at the outside rotation of casing operating function switching device, thereby selects to realize electric screw driver function.
At present, many drill type electric tools can also regulate to adapt to different working conditions to output speed.As U.S. Pat 7,044, shown in 882B2 (calling patent ' 882 patents in the following text), the speed adjusting knob by rotation operation setting on casing is realized at a high speed and the adjusting of low speed.U.S. Pat 7,124, the multi-functional electric tools shown in 839B2 (calling patent ' 839 patents in the following text) has further disclosed by a common button and has realized speed adjusting and function switching.Wherein, when realizing electric drill function, by along the moving axially button and carry out the adjusting of high, low speed of casing, and when high speed, by the circumferential surface rotation at casing, regulate common button, can realize the switching between each function.
But ' although realize the adjusting of speed and the switching of function by a common button in 839 patents, when when speed regulates, the adjusting direction of button is switched with function, the adjusting direction of button is different, makes troubles like this to operation.
Summary of the invention
The object of the invention is: a kind of power tool is provided, and it has a function switching button button, can between impact wrench function and other functions, switch, also can carry out speed adjusting, thereby improved the simplicity of operation simultaneously.
For achieving the above object, technical scheme of the present invention is: a kind of power tool, comprising: housing; Motor, is arranged in housing, has the output shaft that rotation output is provided; Planetary gear reduction system, rotation output after the rotation output of described output shaft is slowed down; Power output system, is delivered to working head by the rotation output of planetary gear reduction system; Function switching button, is contained in housing at least partly, and described function switching button moves to select the impact wrench function, high speed drill function, low speed of power tool to bore one of them of function, screwdriver function.
Further, described function switching button has the primary importance being circumferentially arranged in order along housing, the second place, the 3rd position and the 4th position, described function switching button can move to the 4th position successively from primary importance, or move to successively primary importance from the 4th position, when function switching button is positioned at primary importance, power tool is in impact wrench function, described function switching button is positioned at second place power tool in high speed drill function, described function switching button is positioned at the 3rd position power tool and bores function in low speed, described function switching button is positioned at the 4th position power tool in screwdriver function.
Further, the selectable primary importance that is positioned at of described function switching button, the second place, the 3rd position and the 4th position, when function switching button is positioned at primary importance, power tool is in impact wrench function, described function switching button is positioned at second place power tool in high speed drill function, described function switching button is positioned at the 3rd position power tool and bores function in low speed, described function switching button is positioned at the 4th position power tool in screwdriver function, described primary importance, the second place, the 3rd position and the 4th position are positioned on the same circumference of housing, it is to the straight line that projects into of horizontal plane.
Further, institute's speed planetary gear deceleration system comprises ring gear, and described ring gear makes planetary gear reduction system export high-revolving primary importance and that planetary gear reduction system is exported between the slow-revving second place is removable; Described power output system comprises clutch part, and described clutch part is removable between the primary importance of restriction impact wrench function and the second place of permission impact wrench function; Described function switching button connects spline part, and described spline part is removable between the primary importance of restriction screwdriver function and the second place of permission screwdriver function; Described function switching button also connects ring gear and clutch part, with impact wrench function, high speed drill function, the low speed of exercisable selection power tool, bores function and screwdriver function.
Further, when impact wrench function, described clutch part is positioned at the second place; When high speed drill function, described ring gear is positioned at primary importance, and clutch part is positioned at primary importance; When low speed bores function, described ring gear is positioned at the second place, and clutch part is positioned at primary importance, and spline part is positioned at primary importance; When screwdriver function, described ring gear is positioned at the second place, and clutch part is positioned at primary importance, and spline part is positioned at the second place.
Further, when impact wrench function, described ring gear is positioned at primary importance, and screwdriver function is positioned at primary importance; When high speed drill function, described screwdriver is positioned at primary importance.
Further, described planetary gear reduction system comprises sun gear and is engaged in the planetary gear of the output gear of sun gear, described ring gear engages described sun gear and described planetary gear to export high rotating speed at described primary importance ring gear simultaneously, at second place ring gear, engage described planetary gear, depart from described sun gear with the output slow-speed of revolution.
Further, described power output system comprises main shaft, by V-shaped groove spin mechanism, be assemblied in the active impact block on main shaft, described clutch part connects main shaft, with respect to main shaft, can move axially and can not relatively rotate, described clutch part is at active impact block described in described primary importance clamping directly to export the rotation of main shaft to initiatively impact block, and described clutch part departs from described active impact block in the described second place.
Further, also comprise moved end tooth, engage upwards mutually lock in week when described ring gear is positioned at the second place with described moved end tooth, described spline part optionally locks the motion that rotates in a circumferential direction of moved end tooth.
Further, an end face of described moved end tooth is provided with multiple keyways of circumferential distribution, and described spline part engages described keyway at the end of described primary importance spline part, at the end of described second place spline part, departs from described keyway.
The invention provides a kind of power tool, comprising: housing; Motor, has the motor output shaft that output rotatablely moves, and motor output shaft end is gear; Planetary gear reduction system, institute's speed planetary gear deceleration system comprises the double reduction mechanism axially arranging successively along motor output shaft, described first order reducing gear is arranged the example near motor in the axial direction, and second level reducing gear is arranged the side near main shaft in the axial direction; Described first order reducing gear comprises: the first planet carrier; A plurality of first order planetary gears, described first order planetary gear is circumferentially evenly arranged along the first planet carrier, engages with motor output shaft; The first ring gear, surrounds described first order planetary gear, its internal tooth and the engagement of first order planetary gear; Sun gear, follows the first planet carrier and rotates, and has sun gear output shaft; Second level reducing gear comprises: second level planet carrier; Second level planetary gear, is installed on the planet carrier of the second level, engages with described sun gear output shaft; The second ring gear, surrounds described second level planetary gear, its internal tooth and second level planetary gear engagement main shaft; Chuck, the planetary number of teeth of the described first order is greater than the number of teeth of the gear of motor output shaft.
Further, described motor output shaft comprises axle bed and the output gear arranged vertically, and described axle bed length is greater than described output gear length, and described the first planet carrier comprises pedestal and planetary wheel carrier part accordingly, and described base sleeve is loaded on described axle bed.
Further, between described pedestal and described axle bed, be provided with support.
Further, the relative casing of described the first ring gear is fixedly installed.
Further, between the primary importance that described the first ring gear can be in the axial direction and the second place, move, in described primary importance, the first ring gear is circumferentially fixing, does not engage with the first planet carrier; In the described second place, the first ring gear engages first order planetary gear and sun gear simultaneously, and week is upwards movable.
Further, the relative casing of described the second ring gear is fixedly installed.
Further, between the primary importance that described the second ring gear can be in the axial direction and the second place, move, in described primary importance, the second ring gear engages second level planetary gear and sun gear simultaneously, and week is upwards movable; In the described second place, the second ring gear is circumferentially fixing, does not engage with the first planet carrier.
Further, the ratio of the planetary number of teeth of the first order and motor output shaft gear is greater than 2.
The present invention also provides a kind of technical scheme.A kind of power tool, comprising: housing; Motor, is arranged in housing, has the output shaft that rotation output is provided; Planetary gear reduction system, rotation output after the rotation output of described output shaft is slowed down; Power output system, comprises the main shaft that is driven rotation by planetary gear reduction system; Function changing-over mechanism, selectable setting power tool is in high speed drill function, low speed bores function, screwdriver function, described power tool also comprises speed and screwdriver changeover module, described speed and screwdriver changeover module comprise: ring gear, and described ring gear can be driven the output speed that moves axially to regulate planetary gear reduction system by function changing-over mechanism; Moved end tooth, relatively the connection ring gear of spin locking; Quiet end tooth, oppresses described moved end tooth; Described function changing-over mechanism connects spline part, between the position that drive spline part turns at restriction moved end tooth spiral and the position that departs from moved end tooth, moves.
Further, under high speed drill function, the primary importance of described ring gear on being positioned at axially engages described sun gear and described planetary gear at described primary importance ring gear simultaneously, and described spline part is positioned at the position that departs from moved end tooth; Low speed bores under function, and the second place of described ring gear on being positioned at axially, engages described planetary gear at described second place ring gear, departs from described sun gear; Under screwdriver function, the second place of described ring gear on being positioned at axially, described spline part is positioned at the position that restriction moved end tooth spiral turns.
Further, described function changing-over mechanism comprises the function switching button being installed on housing and is located at the switching ring in housing, described switching ring is provided with stair-stepping speed and switches groove and stair-stepping screwdriver switching groove, in described speed switching groove, speed switch piece is installed, speed switch piece can slide and drive ring gear to move axially in speed is switched groove; Described screwdriver switches in groove installs described spline part, between the position that described spline part can slide with the position turning at restriction moved end tooth spiral and disengaging moved end tooth in screwdriver switches groove, moves axially.
Further, on described ring gear and described moved end tooth, be respectively equipped with spline being connected to each other with spin locking matching.
Further, described moved end tooth is provided with keyway, and described spline part end can embed described keyway rotatablely moving with locking moved end tooth.
Further, on the relative end face of described moved end tooth and described quiet end tooth, be respectively equipped with the tooth matching, when spline part is positioned at the position that departs from moved end tooth, after the moment of torsion on main shaft reaches predetermined value, described moved end tooth is relative with quiet end tooth rotates.
Further, comprise torsion cover, between torsion cover and quiet end tooth, be provided with elastic component, the decrement of the adjustable described elastic component of torsion cover.
Further, power output system comprises beater mechanism, comprise the active impact block being rotarilyd actuate by main shaft, the passive impact block that can engage with active impact block and be driven in rotation, be connected in described passive impact block, by the working shaft of passive impact block driven rotary, wherein said active impact block selectively departs from and engages with passive impact block when the suffered load of working shaft increases to particular value, and then again engage with passive impact block again under the rotary actuation of output shaft, thereby in direction of rotation, working shaft is imposed to intermittent impact, function changing-over mechanism also connects impact wrench switching mechanism, can select allow or locking described in beater mechanism, and then optionally set power tool in impact wrench function.
Further, described impact switching mechanism comprises clutch part, described clutch part is driven the rigid rotating transmission from main shaft to active impact block with selectable foundation or cut-out to connect by described function changing-over mechanism, the connection main shaft of described clutch part spin locking, described clutch part and relative the moving axially of described active impact block, be provided with interlocking member being connected to each other with selectable spin locking that mutual shape is joined separately on it.
The present invention also provides a kind of technical scheme.A kind of power tool, comprising: housing; Motor, is arranged in housing, has the output shaft that rotation output is provided; Planetary gear reduction system, institute's speed planetary gear deceleration system comprises sun gear, be engaged in the planetary gear of the output gear of sun gear, around the ring gear of described planetary gear, primary importance and the second place of described ring gear on having axially, at described primary importance ring gear, engage described sun gear and described planetary gear simultaneously, at second place ring gear, engage described planetary gear, depart from described sun gear, described power tool also comprises moved end tooth, engages upwards mutually lock in week when described ring gear is positioned at the second place with described moved end tooth; And optionally lock moved end tooth rotate in a circumferential direction motion spline part.
Further, comprise in abutting connection with described moved end tooth, axially movable quiet end tooth, and towards the direction of described moved end tooth, oppress the elastic component of quiet end tooth, on the end face that described quiet end tooth and moved end tooth lean, be provided with separately the end tooth matching.
Further, comprise torsion cover, screw thread is coupled to the spiral cover in torsion cover, and described elastic component is the torque spring that is connected in described spiral cover, and the adjustable described spiral cover of described torsion cover moves axially to regulate the decrement of described torque spring.
Further, comprise function switching button, described function switching button drives described spline part to move to be optionally positioned at primary importance and the second place, in the motion that rotates in a circumferential direction of described primary importance spline part locking moved end tooth, allows the motion that rotates in a circumferential direction of moved end tooth at second place spline part.
Further, an end face of described moved end tooth is provided with multiple keyways of circumferential distribution, and described spline part can move axially to be optionally positioned at primary importance and the second place.End at described primary importance spline part engages described keyway, at the end of described second place spline part, departs from described keyway.
Further, comprise and switch ring, which is provided with screwdriver and switch groove, described spline part is provided with the pin that is arranged in described screwdriver switching groove, described function switching button drives described switching ring to rotate to drive described pin to move axially, and spline part is moved axially between primary importance and the second place.
Further, described function switching button drives described ring gear to move axially to be optionally positioned at primary importance and the second place.
Further, in the second place of ring gear, described moved end tooth and described ring gear engage by spline structure.
The present invention also provides a kind of technical scheme.A kind of power tool, comprising: housing; Motor, is arranged in housing, has the output shaft that rotation output is provided; Planetary gear reduction system, rotation output after the rotation output of described output shaft is slowed down; Power output system, comprises the main shaft by planetary gear reduction system driven rotary, the active impact block being rotarilyd actuate by main shaft; The passive impact block engaging with active impact block, described passive impact block is selectable to be rotarilyd actuate by active impact block; Be connected in described passive impact block, the working shaft by passive impact block driven rotary, described active impact block selectively departs from and engages and throw off with passive impact block when the suffered load of working shaft increases to particular value, thereby in direction of rotation, working shaft is imposed to intermittent impact; Function changing-over mechanism, selectable setting power tool is in creeping into function, impact wrench function, one of them of screwdriver function, described power tool comprises impact switching mechanism, described impact switching mechanism comprises clutch part, and described clutch part is driven the rigid rotating transmission from main shaft to active impact block with selectable foundation or cut-out to connect by described function changing-over mechanism.
Further, the connection main shaft of described clutch part spin locking, described clutch part and relative the moving axially of described active impact block, be provided with interlocking member being connected to each other with selectable spin locking that mutual shape is joined separately on it.
Further, described planetary gear reduction system comprises and is fixedly connected with main shaft with the planet carrier that rotatablely moves of output, and described clutch part coordinates being arranged on main shaft or planet carrier of slip by chute slide rail.
Further, described function changing-over mechanism comprises the function switching button being installed on housing and is located at the switching ring in housing, described switching ring is provided with stair-stepping impact wrench and switches groove, in described switching groove, impact wrench switch piece is installed, described impact wrench switch piece connects clutch part, can in impact wrench switches groove, move to drive clutch part to move axially.
Further, described planetary gear reducing mechanism comprises ring gear, described ring gear can move axially to switch the output speed of planetary gear reducing mechanism, described switching ring is provided with stair-stepping speed and switches groove, in described speed switching groove, speed switch piece is installed, described speed switch piece connects the ring gear of planetary gear reduction system, can in speed is switched groove, move to drive ring gear to move axially.
Further, described planetary gear reducing mechanism comprises ring gear, described function changing-over mechanism comprises that the stair-stepping screwdriver switching on ring switches groove, in described screwdriver switching groove, screwdriver switch piece is installed, described screwdriver switch piece is mobile with selectable locking or the rotation of permission ring gear in screwdriver switches groove.
Compared with prior art, function switching button of the present invention can be realized speed by the slip on casing and regulate, and also can realize the switching of impact wrench function simultaneously, has improved the simplicity of operation.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 is the multi-functional drill front view of the specific embodiment of the invention
Fig. 2 is the multi-functional drill top view of the specific embodiment of the invention.
Fig. 3 is the cutaway view of the main apparent direction of the multi-functional drill of the specific embodiment of the invention.
Fig. 4 is the cutaway view of overlooking direction of the multi-functional drill of the specific embodiment of the invention.
Fig. 5 is the decomposing schematic representation of the multi-functional drill of the specific embodiment of the invention.
Fig. 6 is the gear-box stereogram of the multi-functional drill of the specific embodiment of the invention.
Fig. 7 is the second ring gear stereogram of the multi-functional drill of the specific embodiment of the invention.
Fig. 8 is that the multi-functional drill of the specific embodiment of the invention is about impact wrench switching part mechanism stereogram.
Fig. 9 is that the multi-functional drill of the specific embodiment of the invention is about screwdriver switching part mechanism stereogram.
Figure 10 is the switching ring schematic diagram of the impact wrench function of the multi-functional drill of the specific embodiment of the invention.
Figure 11 is the vertical view cutaway drawing of the impact wrench function of the multi-functional drill of the specific embodiment of the invention.
Figure 12 is the switching ring schematic diagram of the high speed drill function of the multi-functional drill of the specific embodiment of the invention.
Figure 13 is the vertical view cutaway drawing of the high speed drill function of the multi-functional drill of the specific embodiment of the invention.
Figure 14 is that the low speed of the multi-functional drill of the specific embodiment of the invention bores the switching ring schematic diagram of function.
Figure 15 is that the low speed of the multi-functional drill of the specific embodiment of the invention bores the vertical view cutaway drawing of function.
Figure 16 is the switching ring schematic diagram of the screwdriver function of the multi-functional drill of the specific embodiment of the invention.
Figure 17 is that the master of the screwdriver function of the multi-functional drill of the specific embodiment of the invention looks cutaway view.
1 multi-functional drill 39 bearing 71 spiral covers
3 housing 41 first planet carrier 711 protruded stigmas
5 handle 43 the first row star-wheel 73 torque springs
The quiet end tooth of 7 power brick 45 sun gear 75
9 chuck 47 second planet carrier 751 columns
10 axis 473 slide rail 753 end teeth
11 switch 49 second planetary gear 77 moved end teeth
13 torsion cover 51 first ring gear 771 keyways
15 commutation button 53 second ring gear 773 end teeth
17 function switching button 531 spline 775 internal splines
171 switch spring 533 annular grooves 81 switches ring
173 fore-set 61 main shaft 811 impact wrench switch groove
19 switch initiatively impact block 813 speed switching grooves of window 63
21 motor 633 first end tooth 815 screwdrivers switch groove
In 23 interior output shaft 635 clutch slot 83, hit spanner switch piece
In 25 outer output shafts 65, hit spring 85 speed switch pieces
The outer V-shaped groove 87 screwdriver switch pieces of 251 support 611
253 axle sleeve 67 spin 871 springs
31 gear-boxes 691 are made axle 891 annular grooves
33 fore shell 693 second end tooth 893 slide blocks
35 back cover 695 accepting groove 895 clutch blocks
37 middle cover 70 bearings
The specific embodiment
Shown in Fig. 1 to Figure 17 is a kind of specific embodiment of power tool of the present invention, and this power tool is specially a kind of multi-functional drill 1.Multi-functional drill 1 has impact wrench function, high speed drill function, and low speed bores function, screwdriver function, wherein high speed drill function and low speed brill function also can be referred to as and creep into function.
As shown in Figure 1, multi-functional drill 1 is similar to pistol-shaped, comprises the housing 3 that is substantially tubular, with the handle 5 of housing 3 angled layouts, and dismountable power brick 7 that is arranged at handle 5 bottoms.Housing 3 has longitudinal axis 10.
The front end of housing 3 is provided with the chuck 9 for clamping working head, for clamp respectively different working head (not shown) when this multi-functional drill 1 is realized difference in functionality, as clamped fastener head when realizing impact wrench function, when realizing high speed drill function or low speed brill function, clamp fluted drill.Chuck 9 outsides are provided with torsion cover 13, and torsion cover 13 can rotate to regulate around axis 10 max. output torque of the multi-functional drill 1 in screwdriver function.The upper part of handle 5 is provided with the switch 11 for opening and closing multi-functional drill 1.The interface portion of handle 5 and housing 3 is also provided with commutation button 15.Multi-functional drill 1 has two commutation buttons 15, lays respectively at the both sides of housing.
See figures.1.and.2, the top of housing 3 is provided with function switching button 17, and function switching button 17 is arranged in the switching window 19 that is located at housing 3 tops and circumferentially extend.Switch window 19 along being circumferentially furnished with successively four predeterminated positions by end to end.Function switching button 17 can move between these four predeterminated positions, successively multi-functional drill 1 is placed in to impact wrench function, high speed drill function, and low speed bores function, screwdriver function.Switch on window 19 or the correspondence position of housing 3 is provided with sign, to indicate described four predeterminated positions and its corresponding function.
Below introduce in detail the internal structure of multi-functional drill 1.
As Fig. 3, take the one end at housing 3 upper grip 9 places as front end, the relative other end is rear end.The rear end of housing 3 contains power source, is specially a direct current generator 21.Motor 21 has output shaft and rotatablely moves with output.In this specific embodiment, output shaft comprises interior output shaft 23 and outer output shaft 25.Interior output shaft 23 is by motor 21 driven rotary, and outer output shaft 25 is sleeved on interior output shaft 23 by interference fit, can be by interior output shaft 23 driven rotary.Outer output shaft 25 has the front and rear that lengthwise extends.Outer output shaft 25 comprises axle bed and output gear, and axle bed is positioned at the rear portion of outer output shaft 25, is set on interior output shaft 23; Output gear is positioned at the front portion of outer output shaft 25, for the dynamic rotation of motor 21 being exported to by gear structure to the deceleration system of multi-functional drill 1.The length of axle bed and diameter are all greater than output gear.
Output shaft extend in gear-box 31, and the housing of gear-box 31 comprises fore shell 33 and back cover 35, and they fasten and form receiving space, contain planetary gear reduction system and power output system.
In conjunction with Fig. 3, Fig. 4, Fig. 5, planetary gear reduction system is a double reduction system, specifically comprise the first planet carrier 41, the first row star-wheel 43, sun gear 45, the second planet carriers 47, the second planetary gear 49, and two ring gears, be respectively the first ring gear 51 and the second ring gear 53.
The first planet carrier 41 comprises columniform pedestal and the circumferential evenly spaced a plurality of planetary gear fulcrums that are arranged on pedestal end face.
Pedestal center is through hole, and pedestal is installed and is supported on the axle bed of output shaft by this through hole.Between pedestal and axle bed, be also provided with support system, specifically comprise that one is enclosed within outside motor output shaft, step-like support 251, one are arranged on the axle sleeve 253 between support 251 and the through-hole wall of pedestal and are arranged on the pad 255 between rear end and the gear-box inwall bottom of pedestal.This support system is to make the rotation that the first row star frame 41 can be good with respect to axle bed.It should be noted that, in the present embodiment, the major part of the pedestal of the first planet carrier is supported on axle bed, and the length of this axle bed is longer, the length that the supported parts of the first planet carrier 41 effectively support is longer, this can stablize the first planet carrier 41, and high-speed rotary transfers can significantly not wear and tear or lose efficacy for a long time.
Planetary gear fulcrum stretches out from the front end of pedestal, and a first row star-wheel 43 is installed on each planetary gear fulcrum.What in this specific embodiment, the number of planetary gear fulcrum and planetary gear 43 was corresponding is 3.The first row star-wheel 43 and output gear engagement, rotated around planetary gear fulcrum by its drive.The internal tooth engagement of 43 whiles of the first row star-wheel and the first ring gear 51.The first ring gear 51 is fixedly installed with respect to gear-box 31.
Planetary gear prop up the tip of the axis reach the first row star-wheel 43 before.Sun gear 45 comprises toothed disc and gear shaft.On the side face of toothed disc and gear shaft, be equipped with tooth.On toothed disc, have plurality of holes, the position of its position and quantity and planetary gear fulcrum and quantity correspondence, prop up the tip of the axis so that sun gear 45 is installed to planetary gear.Gear shaft around around be furnished with and a plurality of second planetary gears 49 of gear shaft engagement.The concrete quantity of the second planetary gear 49 is 5, is sleeved on one by one on the planetary gear fulcrum of respective amount of the second planet carrier 47.The second planet carrier 47 is fixedly connected with power output system.
Outside upwards, the footpath of sun gear 45 and the second planetary gear 49 is provided with the second ring gear 53.And the end tooth of sun gear 45 and the second planetary gear 49 all can be engaged in the internal tooth of the second ring gear 53.The second ring gear 53 can move forward and backward with respect to gear-box 31 in the axial direction, has position after a front position and.In front position, the second ring gear 53 and the second planetary gear 49 engage, and depart from sun gear 45; And in front position, the second ring gear 53 can not rotate, and week is upwards fixed with respect to gear-box.In rear position, the second ring gear engages the end tooth of the gear ring of the second planetary gear 49 and sun gear 45 simultaneously; And rear position the second ring gear can rotate around axis 10, and week is upwards movable with respect to gear-box.
Introduce in detail the moderating process of planetary gear reduction system below.
Referring to 3, Fig. 4, Fig. 5, Fig. 6, Fig. 9, the output shaft rotation of motor 21, drives the first row star-wheel 43 star-wheel fulcrum rotation of detouring, and the internal tooth of the first row star-wheel 43 ring-types along the first ring gear 51 is creeped simultaneously, around axis 10, revolves round the sun.The revolution of the first row star-wheel 43 drives the first planet carrier 41 around axis 10 rotations.Sun gear 45 is connected with the first planet carrier 41 by three planetary gear fulcrums, thereby rotation together with the first planet carrier 41.Be more than the first order moderating process of planetary gear reduction system.In this process, the High Rotation Speed of output shaft output is by the preliminary reduction of the first row star-wheel 43, its speed reducing ratio is the inverse ratio of the number of teeth of output gear and the number of teeth of the first row star-wheel 43 of output shaft, and in the present embodiment, the gear ratio of output gear and the first row star-wheel 43 is 7:18.In order to reach the effect of preferably slowing down, this gear ratio preferably should be less than 1:2.The rotating speed that less gear ratio has reduced the first row star-wheel 43 is set, further improved the stability of deceleration system, simultaneously, be provided with longer axle bed and not only improved the stability supporting, also make the first row star-wheel 43 be arranged on position more forward in gear-box 31, forward position is than the bottom of gear-box, space upwards, footpath is larger, this also makes larger the first row star-wheel 43 is set, and then more tooth is set, and the less gear ratio of final acquisition becomes possibility.In this process, the first row star-wheel 43 revolves round the sun around axis 10, drives the first planet carrier 41 and sun gear 45 to rotate the rotation output speed having reduced for the second time to power output system.
Rotatablely move and output to after sun gear 45, according to former and later two positions of the second ring gear 53, to there being two kinds of deceleration situations.When the second ring gear 53 is positioned at front position, the second ring gear 53 does not optionally rotate and departs from sun gear, thereby the gear shaft of sun gear 45 drives the planetary gear fulcrum rotation of the second planetary gear 49 around the second planet carrier 47, and creep on the internal tooth of the second ring gear 53, around axis 10, revolve round the sun, and then drive the second planet carrier 47 to rotate around axis 10, will rotatablely move and be delivered to power output system.This process has formed the second level deceleration of planetary gear reduction system.When the second ring gear 53 is positioned at rear position, the second ring gear 53 is rotatable and engage toothed disc and second planetary gear 49 of sun gear 45 simultaneously.Therefore, the rotation of sun gear 45 is delivered to the second planetary gear 49 and the second planet carrier 47 by the second ring gear 53, slows down and be cancelled in the second level.
To sum up, the planetary gear reduction system of the present embodiment can be exported two kinds of different rotating speeds.But it is possible that this planetary gear reduction system is improved to the rotating speed output that makes it to provide how different.For example, the first ring gear 51 is arranged to have and the second ring gear 53 He Hou positions, similar front position, make it can optionally engage the first row star-wheel 43 and sun gear 45 simultaneously, or only engage the first row star-wheel 43, then combine the front and back position relation of the first ring gear 51 and the second ring gear 53, at least 3 kinds of rotating speed outputs can be provided, and the setting that it is concrete and combination are that those skilled in the art are easy to according to the thought of foregoing description design, and at this, are not repeating.
The bonding part of fore shell 33 and back cover 35 is also provided with middle cover 37, and middle cover 37 is divided into former and later two parts by gear-box 31, and rear section mainly holds planetary gear reduction system, and forward part is mainly held power output system.The interior ring of middle cover 37 is provided with bearing 39, and bearing 39 supports the second planet carrier 47.
The power output system of this specific embodiment is below described in detail in detail.
As Fig. 3, Fig. 4, Fig. 5, Fig. 7, Fig. 8, foregoing, the second planetary gear 47 is fixedly connected with power output system, concrete, and the second planet carrier 47 is fixedly connected with by interference fit with main shaft 61, and main shaft 61 is followed all the time the second planet carrier 47 and is rotated.
Power output system comprises and one is set in active impact block 63 on main shaft 61, is located at the impact spring 65 between impact block 63 and the second planet carrier 47 initiatively and is positioned at the initiatively spin V-shaped groove beater mechanism of impact block 63 and main shaft 61 joints, wherein this beater mechanism is included in the outer V-shaped groove 611 that main shaft 61 surfaces are recessed to form, the spin 67 of V-shaped groove 611 interior rollings outside, be steel ball in the present embodiment, and be located at active impact block 63 inner rings for accommodating the interior V-shaped groove of spin 67.Initiatively on the front end face of impact block 63, radial symmetric convexes with a pair of the first end tooth 633.Between impact spring 65 and active impact block 63, be provided with packing ring and pad.Initiatively the front end of impact block 63 is also provided with passive impact block 69, and on passive impact block 69 rear end face relative with active impact block 63, the protrusion of radial symmetric is provided with a pair of the second end tooth 693.Power output system also comprises and extends gear-box 31 front ends, is connected in the working shaft 691 of passive impact block 69.Working shaft 691 front ends are provided with accepting groove 695, can when realizing difference in functionality, accommodate corresponding working head, and clamp fixing by chuck 9.Chuck 9 is set in working shaft 691 front ends.
Multi-functional drill 1 of the present invention also has torsion control system, for adjustable max. output torque that power output system is set when the screwdriver function.Torsion control system is below described in detail in detail.
Referring to Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 9, torsion control system comprises torsion cover 13, spiral cover 71, torque spring 73, quiet end tooth 75, moved end tooth 77.
Middle cover 37 is provided with and through hole corresponding to aforesaid multiple axial holes.Quiet end tooth 75 is arranged in the rear section of gear-box 33, has the housing of ring-type, and the front end of housing is provided with the multiple columns 751 corresponding with aforementioned through-hole, and column 751 is through the through hole of middle cover 37, the torque spring 73 on butt protruded stigma 711.The rear end of housing is provided with multiple end teeth 753.Because column 751 is through the through hole of middle cover 37, quiet end tooth 75 can move axially within the specific limits, but can not rotate.The rear of quiet end tooth 75 is provided with moved end tooth 77.Moved end tooth 77 has the housing of ring-type, and the front end end face of housing is provided with the end tooth 773 matching with the end tooth 753 of quiet end tooth 75, and the rear end of housing is provided with keyway 771, and the inner ring surface of housing is provided with internal spline 775.Moved end tooth is being walked upwards irremovablely, in week, upwards optionally has rotatable and non-rotatable two states.
By the adjusting of function switched system, many merits of the present embodiment are bored 1 and are optionally had impact wrench function, high speed drill function, and low speed bores function, screwdriver function.The function switched system of the present embodiment is below described in detail in detail.
Referring to Fig. 3, Fig. 4, Fig. 5, Fig. 6, function switched system mainly comprises function switching button 17, switches ring 81, switches spring 171, fore-set 173, impact wrench switch piece 83, speed switch piece 85, screwdriver switch piece 87, clutch part 89.
Function switching button 17 comprises the toggle that is arranged in switching window 19 and the housing that extend into the semicircle annular of housing 3, the housing of function switching button 17 is arranged with and switches ring 81, switch ring 81 and be sleeved on back cover 35, and can be driven with respect to back cover 35 and rotate around axis 10 by function switching button 17.Switch on the anchor ring that encircles 81 and there is a breach, switch spring 171 and fore-set 173 and be arranged on function switching button 17 and back cover 35 through this breach.Back cover 35 is provided with four recess that distribute along circumferentially, aforesaid four predeterminated position correspondences of these four recess and function switching button 17, and when fore-set 173 stays in a recess, function switching button 17 stays in a corresponding function gear.Be that operator can stir function switching button 17 and circumferentially moves, by fore-set 173, drive and switch ring 81 rotations, when moving to recess, switching spring 171 is oppressed fore-set 173 and is entered recess and tend to stay in this recess, this knee springing of operator's perception and know and entered a function gear, when needs change function, operator overcome switch spring 171 elastic force drive fore-set 173 leave this recess enter another need recess, and drive switch ring 81 accordingly rotate.
It is the tortuous stepped shape of tool that impact wrench switches groove 811, is parallel to each other by two sections, and spaced apart in the axial direction straight trough and the link slot between two sections of straight troughs form.This two ends straight trough is perpendicular to axis 10.Impact wrench switch piece 83 housings into strips, can move axially and not rotatable.Its one end is provided with pin, and pin is arranged in impact wrench and switches groove 811, and by the fit structure of this pin and groove, while switching ring 81 rotation, pin switches in groove 811 and moves to another section of straight trough from one section of straight trough at impact wrench, drives impact wrench switch piece 83 to move axially.
The other end of impact wrench switch piece 83 is bent to form hook to the radially inner side of gear-box 13, hooks in the annular groove 891 extending on clutch part 89.Clutch part 89 is sleeved on outside the second planet carrier 47, and circlewise, annular groove 891 is positioned on its outer peripheral face housing.The inner peripheral surface of clutch part 89 is provided with slide block 893, and front end face is provided with clutch block 895.The outer peripheral face of the second planet carrier 47 is provided with the slide rail 473 matching with slide block 893, clutch part 89 thereby follow all the time the second planet carrier 47 and rotate, and can move axially by relative the second planet carrier 47.Initiatively the rear end face of impact block 63 is provided with the clutch slot 635 matching with clutch block 895.By aforesaid structure, the front position He Hou position of clutch part 89 on having axially, blocks clutch slot 635 at front position clutch block 895, at rear position clutch block 895, departs from clutch slot 635.Clutch part 89 encircles 81 by function switching button 17 by switching, and impact wrench switch piece 83 drives between He Hou position, front position and moves.
Similarly, it be the tortuous stepped shape of tool that speed is switched groove 813, is parallel to each other by two sections, and spaced apart in the axial direction straight trough and the link slot between two sections of straight troughs form.This two ends straight trough is perpendicular to axis 10.Speed switch piece 85 housings into strips, can move axially and not rotatable.Its one end is provided with pin, and pin is positioned at speed and switches groove 813, and by the fit structure of this pin and groove, while switching ring 81 rotation, pin switches in groove 813 and moves to another section of straight trough from one section of straight trough in speed, drives speed switch piece 85 to move axially.
The other end of speed switch piece 85 is bent to form hook to the radially inner side of gear-box 13, hooks and extend in the annular groove 533 of outer peripheral face of the second ring gear 53.On the front end face of the second ring gear 53, be also provided with spline 531, the internal spline 775 of this spline 531 and moved end tooth 77 matches.Foregoing, the second ring gear 53 has He Hou position, front position, respectively corresponding two kinds of speed output.Coordinate above-mentioned structure, the second clutch part 53 encircles 81 by function switching button 17 by switching, and speed switch piece 85 drives between He Hou position, front position and moves.
Screwdriver switches groove 815 for stepped irregularly shaped for tool, upwards has wide portion and narrow portion week, the front end of narrow portion in the axial direction after in the front end of wide portion.Between wide portion and narrow portion, there is transition portion.Screwdriver switch piece 87 is in strip, and can move axially and not rotatable.One end has the pin that is arranged in screwdriver switching groove 815, is also provided with spring 871 between this end and gear-box, and this spring 871 orders about screwdriver switch piece 87 front end of butt screwdriver switching groove 813 forward.The keyway 771 of the other end of screwdriver switch piece 87 and moved end tooth 77 matches.By the fit structure of this pin and groove, while switching ring 81 rotation, pin switches at screwdriver the wide portion that in groove 815, wide portion moves to narrow portion or moves from narrow portion, drives screwdriver switch piece 87 to move axially.Screwdriver switch piece 87 thus have axially on He Hou position, front position, the keyway 771 of the end of screwdriver switch piece 87 engagement moved end tooth 77 when front position, when rear position, the end of screwdriver switch piece 87 departs from the keyway 771 of moved end tooth 77.By optionally rotatablely moving of locking moved end tooth 77 of which.
The function handoff procedure of multi-functional drill 1 is below described in detail in detail.
Foregoing, multi-functional drill 1 can be in impact wrench function, high speed drill function, and low speed bores function, between screwdriver function, switches forward or backwards successively.These merit transformations of energy and the second ring gear 53, the front and back position of clutch part 89 and screwdriver switch piece 87 is closely related, table one is illustrated in aforesaid four kinds of functional statuses and the second ring gear 53, the corresponding relation of clutch part 89 and screwdriver switch piece 87 position separately.
| ? | The |
|
Screwdriver switch piece 87 |
| Impact wrench function | Rear position | Rear position | Front position |
| High speed drill function | Rear position | Front position | Front position |
| Low speed bores function | Front position | Front position | Front position |
| Screwdriver function | Front position | Front position | Rear position |
Table one
Take impact wrench function as original state, as Figure 10, Figure 11, function switching button 17 is in impact wrench gear, and the second ring gear 53 is positioned at rear position, and clutch part 89 is positioned at rear position, and screwdriver switch piece 87 is positioned at front position.
Foregoing, when the second ring gear 53 is positioned at rear position, engage sun gear 45 and the second planetary gear 49 simultaneously, planetary gear reduction system is exported high rotating speed to power output system.And now the spline 531 of the second ring gear 53 and the internal spline 775 of moved end tooth 77 depart from each other, the second ring gear 5 can be by sun gear 45 driven rotary.Now screwdriver switch piece 87 is in front position, and its end snaps in the keyway 771 of moved end tooth 77, forbids that moved end tooth 77 rotates.But now because moved end tooth 77 does not work, therefore screwdriver switch piece 87 is arranged to such an extent that under this functional status, in rear position, be also fine, can not affect the realization of impact wrench function.
Under impact wrench function, clutch part 89 is in rear position, and the clutch block 895 of clutch part 89 departs from the initiatively clutch slot 635 of impact block 63.
When realizing impact wrench function, rotatablely move and output to main shaft 61 via the second planet carrier 47, due to the pressure of impact spring 65, initiatively impact block 63 drives by the spin 67 that is sandwiched in interior V-shaped groove, outer V-shaped groove 611, following main shaft 61 rotates, passive impact block 69 also rotates thereupon, by working shaft 691 and chuck 9, drives working head (not shown) rapidly nut (not shown) to be tightened.
After nut end face and workpiece (not shown) face contact, the moment of resistance increases sharply, reach after certain value, intermeshing active impact block 63 and passive impact block 69 are all obstructed, passive impact block 69 stops operating, but main shaft 61 still rotates under the driving of motor output shaft, forces spin 67 to overcome frictional force between itself and interior V-shaped groove, outer V-shaped groove 611 moving along trough roller, thereby promote initiatively impact block 63, rearward move, make impact spring 65 compressed.Thus, active impact block 63 is in the axial direction gradually away from passive impact block 69.When moving axially distance, active impact block 63 just exceedes after the tooth depth of the second end tooth 693 of passive impact block 69, i.e. active impact block 63 and out-of-gear moment of passive impact block 69, main shaft 61 just drives initiatively impact block 63 to rotate, make its first end tooth 633 slip over the second end tooth 693 of passive impact block 69, slipping over moment, due to the effect of impact spring 65, spin 67 is again along interior V-shaped groove, outer V-shaped groove 611 is got back to original position, initiatively impact block 63 is pushed away forward, along with accelerating to rotate, impacts by main shaft 61 the second end tooth 693 of passive impact block 69 simultaneously, make passive impact block 69 in direction of rotation, continue motion, so move in circles, screw element is tightened under impact moment.
Above-mentioned while realizing impact wrench function, need initiatively impact block 63 intermittent rotaries to impact passive impact block 69, thereby make the working head (fastener head) can fastening nut, but creep into function in realization, while being high speed drill function and low speed brill function, only need working head (fluted drill) to continue to creep into, and no longer need the initiatively intermittence of impact block 31 to impact.Below describe in detail from impact wrench function and be switched to the process of high speed drill function and the duty of high speed drill function.
With reference to Figure 10, Figure 11 and Figure 12, shown in Figure 13, while being switched to high speed drill function from impact wrench function, switch ring 81 and rotate 811 displacements of drive impact wrench switching groove, the pin of impact wrench switch piece 83 is moved to another straight trough from a straight trough, thereby drive impact wrench switch piece 83 to move axially, and then drive clutch part 89 to move to front position from rear position.Complete after switching, the second ring gear 53 is positioned at rear position, and clutch part 89 is positioned at front position, and screwdriver switch piece 87 is positioned at front position.
Due to now, because moved end tooth 77 does not work, therefore screwdriver switch piece 87 is arranged to such an extent that under this functional status, in rear position, be also fine, can not affect the realization of high speed drill function.
Foregoing, when clutch part 89 is positioned at behind front position, the initiatively clutch slot 635 of impact blocks 63 of its clutch block 895 engagements, the transfer route of rotation output becomes by the second planetary gear 47 and/or main shaft 63 to clutch part 89 to active impact block 63, then is delivered to working shaft 691 through passive impact block 69.Concrete, in drilling process, the moment of resistance being subject to due to working shaft 691 increases gradually, and initiatively 63 of impact blocks tend to move towards motor 21.Now, because clutch part 89 has limited the moving backward in the axial direction of impact block 63 initiatively, initiatively the first end tooth 633 of impact block 63 the second end tooth 693 of passive impact block 69 of fitting all the time, meanwhile, initiatively impact block 63, passive impact block 69, working shaft 691 motion together in direction of rotation.Because passive impact block 69 and active impact block 63 cannot depart from all the time, cannot form impact between the two, so can guarantee that working head continues to creep into.
In above-mentioned embodiment, the particularly important is: when realizing high speed drill or low speed brill function, the rotation of being exported by motor 21 is through slowing down, arrive the output 22 of deceleration system, then take clutch part 89 as middleware, be delivered to initiatively impact block 63, the output of having set up deceleration system with this is rigidly connected to transmit rotation in other words to being fixedly connected with of impact block 63 of active; Because the output of main shaft 61 and deceleration system is fixed together by interference fit, also set up being fixedly connected with of main shaft 61 and active impact block 63.And power tool is in the past being switched to by impact wrench function while creeping into function, be all still rely on main shaft 61 and initiatively the flexible connection of the groove between impact block 63 and ball system transmit rotation.
Industry average technical staff easily expect, clutch part 89 also can be selected to be set directly on the outer peripheral face of main shaft 61, along the setting of the axial direction slip of main shaft 61.In this embodiment, clutch part 89 parts and main shaft 61 relatively-stationary being connected in direction of rotation, a part engages or departs from active impact block 63 by spline fitted is selectable, with this, under drill mode (comprising high speed drill function and low speed brill function), set up main shaft 61 being fixedly connected with to active impact block 63, the thinking of this embodiment is identical with aforesaid the preferred embodiments of the present invention, and its concrete form repeats no more.
Equally easily expect, clutch part 89 can also to be different from, the form of spline fitted is selectable to be fixedly connected with impact block 63 initiatively, also can adopt the form and the second planet carrier 47 or the main shaft 61 relatively-stationary cooperation in rotation that are different from slide block slide rail, for example, adopt buckle and hole to coordinate, or projection and groove fit realize being optionally solidly connected of clutch part 89 and active impact block 63, and employing spline fitted realizes the cooperation of clutch part 89 and the second planet carrier 47 or main shaft 61 etc.
Below introduce and from high speed drill function to low speed, bore the switching of function and the concrete mode of action of low speed brill function.
As Figure 12, Figure 13 and Figure 14, Figure 15.While being switched to low speed brill function from high speed drill function, switch ring 81 and rotate 813 displacements of drive speed switching groove, the pin of speed switch piece 85 is moved to another straight trough from a straight trough, thereby drive speed switch piece 85 to move axially, and then drive the second ring gear 53 to move to front position from rear position.Complete after switching, the second ring gear 53 is positioned at front position, and clutch part 89 is positioned at front position, and screwdriver switch piece 87 is positioned at front position.
Foregoing, the second ring gear 53 moves to behind front position from rear position, and the engagement of disengaging and sun gear 45, still engages with the second planetary gear 49.Simultaneously, the spline 531 of the second ring gear 53 and the internal spline 775 of moved end tooth 77 engage, and now screwdriver switch piece 87 is positioned at front position, the end of screwdriver switch piece 87 snaps in the keyway 771 of moved end tooth 775, moved end tooth 775 can not be rotatablely moved, and then the second ring gear 53 can not be rotatablely moved.
By above-mentioned fit system, multi-functional drill 1 is positioned at low speed and bores under function, planetary gear reduction system outputs to power output system via foregoing double reduction by lower rotating speed, and the operating mode of power output system is consistent during with high speed drill function, does not repeat them here.
Below introduce from low speed and bore function to the switching of screwdriver function and the concrete mode of action of screwdriver function.
As Figure 14, Figure 15 and Figure 16, Figure 17.While being switched to screwdriver function from low speed brill function, switch ring 81 and rotate 815 displacements of drive screwdriver switching groove, by the pin of screwdriver switch piece 87 leniently portion move to narrow portion, thereby position after driving screwdriver switch piece 87 to move axially to arrive, departs from and the engagement of moved end tooth 77.Complete after switching, the second ring gear 53 is positioned at front position, and clutch part 89 is positioned at front position, and screwdriver switch piece 87 is positioned at rear position.
Foregoing, spiral cover 71 is by protruded stigma 711, and torque spring 73 is oppressed the column 753 of quiet end tooth 75, wherein protruded stigma 711, and torque spring 73 and column 753 arrange one to one.Quiet end tooth 75 thereby by elasticity compressing butt moved end tooth 77, concrete, the end tooth 753 of quiet the end tooth 75 and end tooth 773 of moved end tooth 77 is oppressed meshes together, thereby stop moved end tooth 77 to rotate.Now, because screwdriver switch piece 87 departs from and the engagement of moved end tooth 77, quiet end tooth 75 is elements that unique direct prevention moved end tooth 77 rotates.
When carrying out the work of screwing, operator drives spiral cover 71 to move forward and backward the decrement that regulates torque spring 73 by torsion cover 13, regulate quiet end tooth 75 to be applied to the elastic force on moved end tooth 77, to set the max. output torque of multi-functional drill 1 under screwdriver function.When ordering about working shaft 691, be rotated further the max. output torque that the moment of torsion needing is greater than setting, the second ring gear 53 drives moved end tooth 77 to overcome the rotation of elasticity oppressive force, the quiet end tooth 75 of promotion going round and beginning again axially moves forward, end tooth 773 and end tooth 753 slope climbing movement each other.Be that moved end tooth 77 can not stop the second ring gear 53 to rotate again, thereby the output of motor only drives the second ring gear 53 to rotate freely, and can not drive the second planet carrier 47 to rotate, will rotatablely move and output to power output system.
Claims (9)
1. a power tool, comprising:
Housing;
Motor, is arranged in housing, has the output shaft that rotation output is provided;
Planetary gear reduction system, rotation output after the rotation output of described output shaft is slowed down;
Power output system, is delivered to working head by the rotation output of planetary gear reduction system;
Function switching button, is contained in housing at least partly, it is characterized in that, described function switching button moves to select the impact wrench function, high speed drill function, low speed of power tool to bore one of them of function, screwdriver function,
Described planetary gear reduction system comprises ring gear, and described ring gear makes planetary gear reduction system export high-revolving primary importance and that planetary gear reduction system is exported between the slow-revving second place is removable;
Described power output system comprises clutch part, and described clutch part is removable between the primary importance of restriction impact wrench function and the second place of permission impact wrench function;
Described function switching button connects spline part, and described spline part is removable between the primary importance of restriction screwdriver function and the second place of permission screwdriver function;
Described function switching button also connects ring gear and clutch part, with impact wrench function, high speed drill function, the low speed of exercisable selection power tool, bores function and screwdriver function.
2. power tool according to claim 1, it is characterized in that, described function switching button has the primary importance being circumferentially arranged in order along housing, the second place, the 3rd position and the 4th position, described function switching button can move to the 4th position successively from primary importance, or move to successively primary importance from the 4th position, when function switching button is positioned at primary importance, power tool is in impact wrench function, described function switching button is positioned at second place power tool in high speed drill function, described function switching button is positioned at the 3rd position power tool and bores function in low speed, described function switching button is positioned at the 4th position power tool in screwdriver function.
3. power tool according to claim 1, it is characterized in that, the selectable primary importance that is positioned at of described function switching button, the second place, the 3rd position and the 4th position, when function switching button is positioned at primary importance, power tool is in impact wrench function, described function switching button is positioned at second place power tool in high speed drill function, described function switching button is positioned at the 3rd position power tool and bores function in low speed, described function switching button is positioned at the 4th position power tool in screwdriver function, described primary importance, the second place, the 3rd position and the 4th position are positioned on the same circumference of housing, it is to the straight line that projects into of horizontal plane.
4. power tool according to claim 1, is characterized in that, when impact wrench function, described clutch part is positioned at the second place; When high speed drill function, described ring gear is positioned at primary importance, and clutch part is positioned at primary importance; When low speed bores function, described ring gear is positioned at the second place, and clutch part is positioned at primary importance, and spline part is positioned at primary importance; When screwdriver function, described ring gear is positioned at the second place, and clutch part is positioned at primary importance, and spline part is positioned at the second place.
5. power tool according to claim 4, is characterized in that, when impact wrench function, described ring gear is positioned at primary importance, and described spline part is positioned at primary importance; When high speed drill function, described spline part is positioned at primary importance.
6. power tool according to claim 1, it is characterized in that, described planetary gear reduction system comprises sun gear and is engaged in the planetary gear of the gear shaft of sun gear, described ring gear engages described sun gear and described planetary gear to export high rotating speed at described primary importance ring gear simultaneously, at second place ring gear, engage described planetary gear, depart from described sun gear with the output slow-speed of revolution.
7. power tool according to claim 1, it is characterized in that, described power output system comprises main shaft, by V-shaped groove spin mechanism, be assemblied in the active impact block on main shaft, described clutch part connects main shaft, with respect to main shaft, can move axially and can not relatively rotate, described clutch part is at active impact block described in described primary importance clamping directly to export the rotation of main shaft to initiatively impact block, and described clutch part departs from described active impact block in the described second place.
8. power tool according to claim 6, is characterized in that, also comprises moved end tooth, engages upwards mutually lock in week when described ring gear is positioned at the second place with described moved end tooth, and described spline part optionally locks the motion that rotates in a circumferential direction of moved end tooth.
9. power tool according to claim 8, it is characterized in that, an end face of described moved end tooth is provided with multiple keyways of circumferential distribution, and described spline part engages described keyway at the end of described primary importance spline part, at the end of described second place spline part, departs from described keyway.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201010239517.8A CN102335904B (en) | 2010-07-20 | 2010-07-20 | Power tool |
| PCT/CN2011/077395 WO2012010093A1 (en) | 2010-07-20 | 2011-07-20 | Power tool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010239517.8A CN102335904B (en) | 2010-07-20 | 2010-07-20 | Power tool |
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| CN102335904B true CN102335904B (en) | 2014-04-16 |
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| CN201010239517.8A Active CN102335904B (en) | 2010-07-20 | 2010-07-20 | Power tool |
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| DE102016213160A1 (en) * | 2015-07-31 | 2017-02-02 | Robert Bosch Gmbh | Hand tool |
| CN205438464U (en) * | 2015-09-21 | 2016-08-10 | 南京德朔实业有限公司 | Power tool |
| CN106567919A (en) * | 2015-10-06 | 2017-04-19 | 唐向阳 | Planetary speed change mechanism |
| CN107009310B (en) * | 2016-01-28 | 2020-04-17 | 韦沃精密机械（上海）有限公司 | High-low speed automatic switching device for electric torque wrench and electric torque wrench |
| CN110560738A (en) * | 2018-06-06 | 2019-12-13 | 苏州宝时得电动工具有限公司 | Hand-held power tool |
| CN109027147B (en) * | 2018-08-23 | 2023-11-17 | 浙江皇冠电动工具制造有限公司 | Transmission device of hand-held machine tool |
| US11453109B2 (en) * | 2019-01-09 | 2022-09-27 | Makita Corporation | Power tool |
| JP7236921B2 (en) * | 2019-04-18 | 2023-03-10 | 株式会社マキタ | impact tool |
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| CN102335904A (en) | 2012-02-01 |
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