CN102335904A - Power tool - Google Patents
Power tool Download PDFInfo
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- CN102335904A CN102335904A CN2010102395178A CN201010239517A CN102335904A CN 102335904 A CN102335904 A CN 102335904A CN 2010102395178 A CN2010102395178 A CN 2010102395178A CN 201010239517 A CN201010239517 A CN 201010239517A CN 102335904 A CN102335904 A CN 102335904A
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- gear
- switching button
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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 between multiple function, switch.
Background technology
In existing drill gun class power tool, generally include that electric drill, electric screw are criticized, percussion drill, impact wrench etc.
It is to be used for screw-driving to workpiece that electric screw is criticized.It generally includes the safety clutch structure, and this clutch is made up of clutch driving link and driven member, and driving link and reduction gearing are one, and the driven member rotational fixation also can move axially with respect to casing in casing.One working spring acts on the end face tooth of driving link through driven member, makes driving link fixing and then can make the screwdriver rotation by transmitting torque on direction of rotation.During operation, the torque of motor is delivered to screwdriver through planetary gear reducing mechanism, makes it rotation, and driver bit and head of screw groove cooperate, thereby screw is tightened rapidly.Along with screw-driving, the moment of resistance that receives on the driving link increases sharply, and produces an axial thrust through end tooth; After the moment of resistance surpassed the dropout preset value, this axial thrust forced driven member further compression work spring and breaking away from driving link forward, was driven in rotation lose the support of driven member when driving link after; Thereby planetary gear reducing mechanism no-output; Driving link also has the trend of rotating with motor output shaft, and engagement again under the restoring force effect of working spring subsequently so goes round and begins again; Screw no longer receives torsional interaction, and motor is still rotating.Through this structure, the screw of tightening had both reached the regulation pulling force, again can be by drawing crack, and motor can not produce overload, stall yet, damages or burn.
Percussion drill mainly is to be used on the workpiece of fragile material, punching, and it has percussion mechanism, and this percussion mechanism is made up of moving cam and quiet cam that opposing end surface has canine tooth shape tooth.Moving cam is installed in the output shaft middle part, and quiet cam is fixed on the casing, is provided with spring between the dynamic and static cam and is used for making both to be separated from each other.When carrying out percussive drilling, drill bit vertically is pressed onto on the surface of the work, and is axially applying suitable pressure, the elastic force that overcomes spring like this is meshing with each other dynamic and static cam, starter motor, and the torque of motor is arrived output shaft through dynamic and static gear transmission.Output shaft can be to producing axial backward a thrust with the relatively-stationary quiet cam of casing in rotary course, moves after making percussion drill, when moving cam forwards the engaging tooth drop out of gear to, moves the distance of a tooth depth behind the percussion drill.Drop out of gear is instantaneous, and the axial force that adds owing to continuing makes quiet cam impact moving cam rapidly with percussion drill, thereby surface of the work is produced strong wallop.So go round and begin again, just produced the compound motion that the rotation that continues 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 on masonry, concrete component, get the hole.
Impact wrench mainly is to be used for fastening bolt.It has initiatively impact block; Passive impact block etc.; Initiatively impact block is driven by the output shaft rotation of gear reduction, and passive impact block can be driven in rotation with the engagement of active impact block; Passive impact block is located on the working shaft and rotation drives working shaft; Wherein said active impact block selectively breaks away from engagement with passive impact block when the suffered load of working shaft increases to particular value, and then under the rotation of output shaft drives, meshes again with passive impact block again, thereby on direction of rotation, working shaft is imposed intermittent impact
Electric drill is to be used on workpiece, holing, and in operation process, auger spindle rotates constantly.Usually, the user need carry out dissimilar operations when carrying out operation, like the turn of the screw, stubborn bolt, boring etc.So, need the user to prepare the electric tool of number of different types, also will constantly more bring and operate and to 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, through rotating this element to different circumferential positions, and can corresponding realization electric drill, the function of electric screw driver and percussion drill.Wherein, In realizing the mechanism that electric screw driver and other functions are switched; Be provided with axially extended confinement block in the casing, it can prop up the clutch driven member and the clutch driving link can't be driven in rotation, and is provided with the projection that can axially cooperate with this confinement block in the function switching device.When realizing electric drill or percussion drill function, the projection in the function switching device cooperates with confinement block and makes confinement block prop up the clutch driven member; When realizing the electric screw driver function, the projection in the function switching device cooperates with the confinement block disengaging, thereby the clutch driving link can be driven in rotation and realize the clutch function.U.S. Pat 6; 457; 535B1 (calling patent ' 535 patents in the following text) has disclosed similar clutch switching construction, moves axially the clutch function limiting element of interior through rotating the operating function switching device in the casing outside, thereby selects to realize the electric screw driver function.
At present, many drill type electric tools can also be regulated to adapt to the different working situation output speed.Like U.S. Pat 7,044, shown in the 882B2 (calling patent ' 882 patents in the following text), realize at a high speed and the adjusting of low speed through the speed regulation button that rotary manipulation is arranged on the casing.U.S. Pat 7,124, the multi-functional electric tools shown in the 839B2 (calling patent ' 839 patents in the following text) have further disclosed through a common button and have realized speed regulation and function switching.Wherein, when realizing the electric drill function,, and when high speed,, can realize the switching between each function through the common button of circumferential surface rotation adjusting at casing through the adjusting that button carries out high, low speed that moves axially along casing.
Yet ' though realize the adjusting of speed and the switching of function through a common button in 839 patents, the adjusting direction of button was different when the adjusting direction of button was switched with function during speed regulation, made troubles to operation like this.
Summary of the invention
The objective 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, and also can carry out speed regulation simultaneously, thereby has improved the simplicity of operation.
For realizing above-mentioned purpose, technical scheme of the present invention is: a kind of power tool comprises: housing; Motor is arranged in housing, has the output shaft that rotation output is provided; Planetary gear reduction system is exported the back rotation output of slowing down with the rotation of said output shaft; Power output system is delivered to working head with the rotation of planetary gear reduction system output; Function switching button, part is contained in the housing at least, and said function switching button moves one of them of boring function, screwdriver function with the impact wrench function of selecting power tool, high speed drill function, low speed.
Further; Said function switching button has the primary importance that circumferentially is arranged in order along housing, the second place, the 3rd position and the 4th position; Said function switching button can move to the 4th position successively from primary importance; Or move to primary importance successively from the 4th position, and power tool was in the impact wrench function when function switching button was positioned at primary importance, and said function switching button is positioned at second place power tool and is in the high speed drill function; Said function switching button is positioned at the 3rd position power tool and is in low speed brill function, and said function switching button is positioned at the 4th position power tool and is in the screwdriver function.
Further; The selectable primary importance that is positioned at of said function switching button, the second place, the 3rd position and the 4th position; Power tool was in the impact wrench function when function switching button was positioned at primary importance; Said function switching button is positioned at second place power tool and is in the high speed drill function, and said function switching button is positioned at the 3rd position power tool and is in low speed brill function, and said function switching button is positioned at the 4th position power tool and is in the screwdriver function; Said primary importance, the second place, the 3rd position and the 4th position are positioned on the same circumference of housing, and it is to the straight line that projects into of horizontal plane.
Further, institute's speed planetary gear deceleration system comprises ring gear, and said 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; Said power output system comprises clutch part, and said clutch part is removable between the second place of primary importance that limits the impact wrench function and permission impact wrench function; Said function switching button connects the spline part, and said spline part is removable between the second place of primary importance that limits the screwdriver function and permission screwdriver function; Said function switching button also connects ring gear and clutch part, with impact wrench function, high speed drill function, low speed brill function and the screwdriver function of exercisable selection power tool.
Further, when being in the impact wrench function, said clutch part is positioned at the second place; When being in the high speed drill function, said ring gear is positioned at primary importance, and clutch part is positioned at primary importance; When being in low speed brill function, said ring gear is positioned at the second place, and clutch part is positioned at primary importance, and the spline part is positioned at primary importance; When being in the screwdriver function, said ring gear is positioned at the second place, and clutch part is positioned at primary importance, and the spline part is positioned at the second place.
Further, when being in the impact wrench function, said ring gear is positioned at primary importance, and the screwdriver function is positioned at primary importance; When being in the high speed drill function, said screwdriver is positioned at primary importance.
Further; Said planetary gear reduction system comprises sun gear and the planetary gear that is engaged in the output gear of sun gear; Said ring gear meshes said sun gear and said planetary gear to export high rotating speed simultaneously at said primary importance ring gear; Mesh said planetary gear at second place ring gear, break away from said sun gear with the output slow-speed of revolution.
Further; Said power output system comprises main shaft; Be assemblied in the active impact block on the main shaft through V-shaped groove spin mechanism, said clutch part connects main shaft, can move axially and can not relatively rotate with respect to main shaft; Said clutch part directly exports initiatively impact block at the said active impact block of said primary importance clamping to the rotation with main shaft, and said clutch part breaks away from said active impact block in the said second place.
Further, also comprise the moved end tooth, tooth engagement in when said ring gear is positioned at the second place and said moved end is upwards to lock the motion that rotates in a circumferential direction of the locking moved end tooth that said spline part is optional each other in week.
Further, an end face of said moved end tooth is provided with a plurality of keyways of circumferential distribution, and said spline part engages said keyway at the end of said primary importance spline part, breaks away from said keyway at the end of said second place spline part.
The invention provides a kind of power tool, comprising: housing; Motor has the motor output shaft that output rotatablely moves, and the motor output shaft end is a gear; Planetary gear reduction system; Institute's speed planetary gear deceleration system comprises the double reduction mechanism that axially arranges successively along motor output shaft; Said first order reducing gear is arranged in the axial direction the side near motor, and second level reducing gear is arranged in the axial direction the side near main shaft; Said first order reducing gear comprises: first planet carrier; A plurality of first order planetary gears, said first order planetary gear is circumferentially evenly arranged along first planet carrier, is meshed with motor output shaft; First ring gear surrounds said first order planetary gear, its internal tooth and the engagement of first order planetary gear; Sun gear is followed first planet carrier and is rotated, 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, with said sun gear output shaft engagement; Second ring gear surrounds said second level planetary gear, its internal tooth and second level planetary gear engagement main shaft; Chuck, the planetary number of teeth of the said first order is greater than the number of teeth of the gear of motor output shaft.
Further, said motor output shaft comprises axle bed and the output gear of arranging vertically, and said axle bed length is greater than said output gear length, and said first planet carrier comprises pedestal and planetary wheel carrier part accordingly, and said base sleeve is loaded on the said axle bed.
Further, be provided with support between said pedestal and the said axle bed.
Further, the relative casing of said first ring gear fixedly installs.
Further, move between the primary importance that said first ring gear can be in the axial direction and the second place, in said primary importance, first ring gear is circumferentially fixing, does not mesh with first planet carrier; In the said second place, first ring gear meshes first order planetary gear and sun gear simultaneously, and week is upwards movable.
Further, the relative casing of said second ring gear fixedly installs.
Further, move between the primary importance that said second ring gear can be in the axial direction and the second place, in said primary importance, second ring gear meshes second level planetary gear and sun gear simultaneously, and week is upwards movable; In the said second place, second ring gear is circumferentially fixing, does not mesh with 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 comprises: housing; Motor is arranged in housing, has the output shaft that rotation output is provided; Planetary gear reduction system is exported the back rotation output of slowing down with the rotation of said output shaft; Power output system comprises by the main shaft of planetary gear reduction system driven in rotation; Function changing-over mechanism; Selectable setting power tool is in the high speed drill function; Low speed bores function, the screwdriver function, and said power tool also comprises speed and screwdriver changeover module; Said speed and screwdriver changeover module comprise: ring gear, and said ring gear can be driven by function changing-over mechanism and move axially to regulate the output speed of planetary gear reduction system; Moved end tooth, the connection ring gear of spin locking relatively; Quiet end tooth is oppressed said moved end tooth; Said function changing-over mechanism connects the spline part, drives the spline part and between the position of position of limiting moved end tooth spiral commentaries on classics and disengaging moved end tooth, moves.
Further, under the high speed drill function, the primary importance on said ring gear is positioned at axially meshes said sun gear and said planetary gear simultaneously at said primary importance ring gear, and said spline part is positioned at the position that breaks away from the moved end tooth; Low speed bores under the function, and the second place on said ring gear is positioned at axially meshes said planetary gear at said second place ring gear, breaks away from said sun gear; Under the screwdriver function, the second place on said ring gear is positioned at axially, said spline part is positioned at the position that restriction moved end tooth spiral changes.
Further; Said function changing-over mechanism comprises function switching button that is installed on the housing and the switching ring of being located in the housing; Said switching ring is provided with stair-stepping speed and switches groove and stair-stepping screwdriver switching groove; In the said speed switching groove speed switch piece is installed, the speed switch piece can slide in speed is switched groove and drive ring gear and move axially; In the said screwdriver switching groove said spline part is installed, said spline part can slide in screwdriver switches groove between the position of position of limiting moved end tooth spiral commentaries on classics and disengaging moved end tooth, axially to move.
Further, be respectively equipped with spline being connected to each other that matches on said ring gear and the said moved end tooth with spin locking.
Further, said moved end tooth is provided with keyway, and said spline part end can embed said keyway rotatablely moving with locking moved end tooth.
Further, be respectively equipped with the tooth that matches on the opposing end faces of said moved end tooth and said quiet end tooth, when the spline part was positioned at the position that breaks away from the moved end tooth, said moved end tooth and quiet end tooth rotated relatively after the moment of torsion on the main shaft reaches predetermined value.
Further, comprise the torsion cover, be provided with elastic component between torsion cover and the quiet end tooth, the decrement of the said elastic component of torsion cover scalable.
Further; Power output system comprises beater mechanism, comprises the active impact block that is driven by main axis rotation, the passive impact block that can be driven in rotation with the engagement of active impact block; Be connected in said passive impact block; By the working shaft of passive impact block driven rotary, wherein said active impact block selectively breaks away from engagement with passive impact block when the suffered load of working shaft increases to particular value, and then under the rotation of output shaft drives, meshes again with passive impact block again; Thereby on direction of rotation, working shaft is imposed intermittent impact; Function changing-over mechanism also connects the impact wrench switching mechanism, can select to allow or the said beater mechanism of locking, and then optional setting power tool is in the impact wrench function.
Further; Said impact switching mechanism comprises clutch part; Said clutch part is driven with selectable foundation by said function changing-over mechanism or cuts off the rigid rotating transmission connection from main shaft to the active impact block; The connection main shaft of said clutch part spin locking, said clutch part and said active impact block can move axially relatively, are provided with interlocking member being connected to each other with selectable spin locking that mutual shape is joined on it separately.
The present invention also provides a kind of technical scheme.A kind of power tool comprises: 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, is engaged in the planetary gear of the output gear of sun gear, around the ring gear of said planetary gear; The primary importance and the second place on said ring gear has axially; Mesh said sun gear and said planetary gear simultaneously at said primary importance ring gear, mesh said planetary gear, break away from said sun gear at second place ring gear; Said power tool also comprises the moved end tooth, and tooth engagement in when said ring gear is positioned at the second place and said moved end is upwards to lock in week each other; And the spline part of the motion that rotates in a circumferential direction of optional locking moved end tooth.
Further, comprise in abutting connection with said moved end tooth, the quiet end tooth that axially-displaceable is moving, and towards said moved end the direction of tooth is oppressed the elastic component of quiet end tooth, be provided with the end tooth that matches separately on the end face that said quiet end tooth and moved end tooth lean.
Further, comprise the torsion cover, screw thread is coupled to the spiral cover in the torsion cover, and said elastic component is the torque spring that is connected in said spiral cover, and the said spiral cover of said torsion cover scalable moves axially to regulate the decrement of said torque spring.
Further; Comprise function switching button; Said function switching button drives said spline part and moves with the optional primary importance and the second place of being positioned at, in the motion that rotates in a circumferential direction of said primary importance spline part locking moved end tooth, in the motion that rotates in a circumferential direction of second place spline part permission moved end tooth.
Further, an end face of said moved end tooth is provided with a plurality of keyways of circumferential distribution, and said spline part can move axially with the optional primary importance and the second place of being positioned at.End at said primary importance spline part engages said keyway, breaks away from said keyway at the end of said second place spline part.
Further; Comprise and switch ring, which is provided with screwdriver and switch groove that said spline part is provided with and is arranged in the pin that said screwdriver switches groove; Said function switching button drives said switching ring and rotates to drive said bearing pin to moving, and the spline part is axially moved between the primary importance and the second place.
Further, said function switching button drives said ring gear and moves axially with the optional primary importance and the second place of being positioned at.
Further, in the second place of ring gear, said moved end tooth and said ring gear are through the spline structure engagement.
The present invention also provides a kind of technical scheme.A kind of power tool comprises: housing; Motor is arranged in housing, has the output shaft that rotation output is provided; Planetary gear reduction system is exported the back rotation output of slowing down with the rotation of said output shaft; Power output system comprises the main shaft by the planetary gear reduction system driven rotary, by the active impact block of main axis rotation driving; With the passive impact block of active impact block engagement, said passive impact block is selectable by initiatively impact block rotation driving; Be connected in said passive impact block, by the working shaft of passive impact block driven rotary; Said active impact block selectively breaks away from engagement with passive impact block and throws off when the suffered load of working shaft increases to particular value, thereby on direction of rotation, working shaft is imposed intermittent impact; Function changing-over mechanism; Selectable setting power tool is in and creeps into function; The impact wrench function, one of them of screwdriver function, said power tool comprises the impact switching mechanism; Said impact switching mechanism comprises clutch part, and said clutch part is driven with selectable foundation by said function changing-over mechanism or cuts off the rigid rotating transmission connection from main shaft to the active impact block.
Further, the connection main shaft of said clutch part spin locking, said clutch part and said active impact block can move axially relatively, are provided with interlocking member being connected to each other with selectable spin locking that mutual shape is joined on it separately.
Further, said planetary gear reduction system comprises the planet carrier that the fixed connection main shaft rotatablely moves with output, and said clutch part cooperates being installed on main shaft or the planet carrier of slip through the chute slide rail.
Further; Said function changing-over mechanism comprises function switching button that is installed on the housing and the switching ring of being located in the housing; Said switching ring is provided with stair-stepping impact wrench and switches groove; In the said switching groove impact wrench switch piece is installed, said impact wrench switch piece connects clutch part, can in impact wrench switches groove, move to drive clutch part to move axially.
Further; Said planetary gear reducing mechanism comprises ring gear; Said ring gear can move axially to switch the output speed of planetary gear reducing mechanism, and said switching ring is provided with stair-stepping speed and switches groove, in the said speed switching groove speed switch piece is installed; Said 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; Said planetary gear reducing mechanism comprises ring gear; Said function changing-over mechanism comprises that the stair-stepping screwdriver that switches on the ring switches groove; In the said screwdriver switching groove screwdriver switch piece is installed, said screwdriver switch piece moves with selectable locking in screwdriver switches groove or allows the ring gear rotation.
Compared with prior art, function switching button of the present invention can be realized speed regulation through the slip on casing, also can realize the switching of impact wrench function simultaneously, has improved the simplicity of operation.
Description of drawings
Below in conjunction with accompanying drawing the present invention is described further.
Fig. 1 is the multi-functional brill front view of the specific embodiment of the invention
Fig. 2 is the multi-functional brill vertical view of the specific embodiment of the invention.
Fig. 3 is the cutaway view of main apparent direction of the multi-functional brill of the specific embodiment of the invention.
Fig. 4 is the cutaway view of overlooking direction of the multi-functional brill of the specific embodiment of the invention.
Fig. 5 is the decomposing schematic representation of the multi-functional brill of the specific embodiment of the invention.
Fig. 6 is the gear-box stereogram of the multi-functional brill of the specific embodiment of the invention.
Fig. 7 is the second ring gear stereogram of the multi-functional brill of the specific embodiment of the invention.
Fig. 8 is that the multi-functional brill of the specific embodiment of the invention is about impact wrench switching part mechanism stereogram.
Fig. 9 is that the multi-functional brill of the specific embodiment of the invention is about screwdriver switching part mechanism stereogram.
Figure 10 is the switching ring sketch map of impact wrench function of the multi-functional brill of the specific embodiment of the invention.
Figure 11 is the vertical view cutaway drawing of impact wrench function of the multi-functional brill of the specific embodiment of the invention.
Figure 12 is the switching ring sketch map of high speed drill function of the multi-functional brill of the specific embodiment of the invention.
Figure 13 is the vertical view cutaway drawing of high speed drill function of the multi-functional brill of the specific embodiment of the invention.
Figure 14 is that the low speed of the multi-functional brill of the specific embodiment of the invention bores the switching ring sketch map of function.
Figure 15 is that the low speed of the multi-functional brill of the specific embodiment of the invention bores the vertical view cutaway drawing of function.
Figure 16 is the switching ring sketch map of screwdriver function of the multi-functional brill of the specific embodiment of the invention.
Figure 17 is that the master of screwdriver function of the multi-functional brill of the specific embodiment of the invention looks cutaway view.
1 multi-functional brill 39 bearings 70 bearings
3 housings, 41 first planet carriers, 71 spiral covers
5 handles, 411 pedestals, 711 protruded stigmas
7 power brick, 413 planetary gear fulcrums, 73 torque springs
9 chucks, 43 first planetary gears, 75 quiet end teeth
10 axis, 45 sun gears, 751 columns
11 switches, 47 second planet carriers, 753 end teeth
13 torsion covers, 473 slide rails, 77 moved end teeth
15 switching-over buttons, 49 second planetary gears, 771 keyways
17 function switching buttons, 51 first ring gears, 773 end teeth
171 switch spring 53 second ring gears 775 internal splines
173 fore-sets, 531 splines 81 switch ring
Hit spanner in 19 switching windows, 533 annular grooves 811 and switch groove
21 motors, 61 main shafts, 813 speed are switched groove
Hit the spanner switch piece in the V-shaped groove 83 in the 25 outer output shafts 631
251 supports, 633 first end teeth, 85 speed switch pieces
253 axle sleeves, 635 clutch slot, 87 screwdriver switch pieces
27 axle beds, 611 outer V-shaped groove 89 clutch parts
29 output gears, 67 spin, 891 annular grooves
31 gear-boxes, 69 passive impact block 893 slide blocks
33 fore shells, 691 working shafts, 895 clutch blocks
35 back covers, 693 second end teeth
37 middle covers, 695 accepting grooves
The specific embodiment
What Fig. 1 was extremely shown in 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 brill 1.Multi-functional brill 1 has the impact wrench function, the high speed drill function, and low speed bores function, the 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 brill 1 is similar to pistol-shaped, comprises the housing 3 that is tubular basically, with handle 5 and dismountable power brick 7 that is arranged at handle 5 bottoms of housing 3 angled layouts.Housing 3 has longitudinal axis 10.
The front end of housing 3 is provided with the chuck 9 that is used for the clamping working head; Be used for difference clamping different working head (not shown) when this multi-functional brill 1 is realized difference in functionality; Like clamping fastener head when realizing the impact wrench function, clamping fluted drill when realizing that high speed drill function or low speed bore function.Chuck 9 outsides are provided with torsion cover 13, and torsion cover 13 can rotate the max. output torque that is in the multi-functional brill 1 of screwdriver function with adjusting around axis 10.The upper part of handle 5 is provided with the switch 11 that is used to open and close multi-functional brill 1.The interface portion of handle 5 and housing 3 also is provided with switching-over button 15.Multi-functional brill 1 has two switching-over 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 extends.Switch window 19 along circumferentially being furnished with four predeterminated positions successively by end to end.Function switching button 17 can move between these four predeterminated positions, successively multi-functional brill 1 is placed the impact wrench function, the high speed drill function, and low speed bores function, screwdriver function.Switch on the 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 the internal structure of multi-functional brill 1 in detail.
Like Fig. 3, an end that belongs to housing 3 upper grips 9 is a front end, and the relative other end is the rear end.The rear end of housing 3 contains power source, is specially a direct current motor 21.Motor 21 has output shaft and rotatablely moves with output.In this specific embodiment, output shaft 23 and outer output shaft 25 in output shaft comprises.Interior output shaft 23 is by motor 21 driven rotary, and outer output shaft 25 is sleeved on the interior output shaft 23 through 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 27 and output gear 29, and axle bed 27 is positioned at the rear portion of outer output shaft 25, is set on the interior output shaft 23; Output gear 29 is positioned at the front portion of outer output shaft 25, is used for through gear structure the power rotation of motor 21 being exported to the deceleration system of multi-functional brill 1.The length of axle bed 27 and diameter are all greater than output gear 29.
Output shaft extend in the 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 first planet carrier, 41, the first planetary gears 43, sun gear 45, the second planet carriers 47; Second planetary gear 49, and two ring gears are respectively first ring gear 51 and second ring gear 53.
Pedestal 411 centers are through hole, and pedestal 411 is installed and is supported on the axle bed 27 of output shaft through this through hole.Also be provided with support system between pedestal 411 and the axle bed 27; Specifically comprising one, to be enclosed within motor output shaft outer, and step-like support 251, one are arranged on the axle sleeve 253 between the through-hole wall of support 251 and pedestal 411 and are arranged on the rear end of pedestal 411 and the pad 255 between the gear-box inwall bottom.This support system so that first planet carrier 41 can be good with respect to axle bed 27 rotation.It should be noted that; In the present embodiment; The major part of the pedestal 411 of first planet carrier is supported on the axle bed 27, and the length of this axle bed 27 is longer, and promptly the effective length that supports of the supported parts of first planet carrier 41 is longer; This can stablize the planet carrier 41 of winning, and high speed is rotated and can significantly do not worn and not torn or lose efficacy for a long time.
Planetary gear fulcrum 413 stretches out from the front end of pedestal 411, and one first planetary gear 43 is installed on each planetary gear fulcrum 413.The number of planetary gear fulcrum 413 and planetary gear 43 is corresponding in this specific embodiment is 3.First planetary gear 43 and output gear 29 engagements are by its drive star gear fulcrum 413 rotations of detouring.The internal tooth engagement of 43 whiles of first planetary gear and first ring gear 51.First ring gear 51 fixedly installs with respect to gear-box 31.
The end of planetary gear fulcrum 413 reaches the front of first planetary gear 43.Sun gear 45 comprises toothed disc and gear shaft.Be equipped with tooth on the side face of toothed disc and gear shaft.Have plurality of holes on the toothed disc, the position of its position and quantity and planetary gear fulcrum 413 and quantity are corresponding, sun gear 45 is installed to the end of planetary gear fulcrum 413.Around the gear shaft around be furnished with a plurality of second planetary gears 49 with the gear shaft engagement.The concrete quantity of second planetary gear 49 is 5, is sleeved on one by one on the planetary gear fulcrum of respective amount of second planet carrier 47.Second planet carrier 47 is fixedly connected power output system.
The outside that the footpath of the sun gear 45 and second planetary gear 49 makes progress is provided with second ring gear 53.And the end tooth of the sun gear 45 and second planetary gear 49 all can be engaged in the internal tooth of second ring gear 53.Second ring gear 53 can move forward and backward with respect to gear-box 31 in the axial direction, has position behind a front position and.In the front position, second ring gear 53 and 49 engagements of second planetary gear, and break away from sun gear 45; And second ring gear 53 can not rotate in the front position, and promptly week is upwards fixed with respect to gear-box.In the position, back, second ring gear meshes the end tooth of the gear ring of second planetary gear 49 and sun gear 45 simultaneously; And back position second ring gear can be around axis 10 rotations, and promptly week is upwards movable with respect to gear-box.
Introduce the moderating process of planetary gear reduction system below in detail.
Referring to 3, Fig. 4, Fig. 5, Fig. 6, Fig. 9, the rotation of the output shaft of motor 21 drives star-wheel fulcrum 413 rotations of detouring of first planetary gear 43, and first planetary gear 43 is creeped along the internal tooth of the ring-type of first ring gear 51 simultaneously, around axis 10 revolution.The revolution of first planetary gear 43 drives first planet carrier 41 around axis 10 rotations.Sun gear 45 is connected with first planet carrier 41 through three planetary gear fulcrums 413, thereby with 41 rotations of first planet carrier.More than be the first order moderating process of planetary gear reduction system.In this process; The high speed rotation of output shaft output is by the preliminary reduction of first planetary gear 43; Its speed reducing ratio is the inverse ratio of the number of teeth of the number of teeth and first planetary gear 43 of the output gear 29 of output shaft, and in the present embodiment, the gear ratio of the output gear 29 and first planetary gear 43 is 7: 18.In order to reach more excellent deceleration effect, this gear ratio preferably should be less than 1: 2.The rotating speed that less gear ratio has reduced by first planetary gear 43 is set, has further improved the stability of deceleration system, simultaneously; Be provided with long axle bed 27 and not only improved the stability that supports, also make the planetary gear 43 of winning be arranged on position more forward in the gear-box 31, forward position is than the bottom of gear-box; The space that the footpath makes progress is bigger; The first bigger planetary gear 43 of this also feasible setting, and then more tooth is set, finally obtaining less gear ratio becomes possibility.In this process, first planetary gear 43 is around axis 10 revolution, and 45 rotations have reduced the rotation output speed to power output system for the second time with sun gear to drive first planet carrier 41.
Rotatablely move output to sun gear 45 after, according to former and later two positions of second ring gear 53, to two kinds of deceleration situations should be arranged.When second ring gear 53 is positioned at the front position; Second ring gear 53 is optional does not rotate and breaks away from sun gear; Thereby the gear shaft of sun gear 45 drives second planetary gear 49 around the rotation of the planetary gear fulcrum of second planet carrier 47, and on the internal tooth of second ring gear 53, creeps, around axis 10 revolution; And then drive second planet carrier 47 around axis 10 rotations, will rotatablely move is delivered to power output system.This process has formed the second level deceleration of planetary gear reduction system.When second ring gear 53 is positioned at the back during position, second ring gear 53 is rotatable and mesh the toothed disc and second planetary gear 49 of sun gear 45 simultaneously.Therefore, the rotating tee of sun gear 45 is crossed second ring gear 53 and is delivered to second planetary gear 49 and second planet carrier 47, slows down and be cancelled in the second level.
To sum up, the planetary gear reduction system of present embodiment can be exported two kinds of different rotating speed.Yet, this planetary gear reduction system improved to make it to provide the output of more different rotating speed be possible.For example; First ring gear 51 is arranged to have and second ring gear, 53 similar front positions and position, back, makes it mesh first planetary gear 43 and sun gear 45 can be optional the time, or only mesh first planetary gear 43; Make up the front and back position relation of first ring gear 51 and second ring gear 53 then; At least 3 kinds of rotating speed outputs promptly can be provided, and setting that it is concrete and compound mode are that those skilled in the art are easy to according to the thought of foregoing description design, and are not giving unnecessary details at this.
The bonding part of fore shell 33 and back cover 35 also is provided with middle cover 37, and middle cover 37 is divided into former and later two parts with gear-box 31, and the rear section mainly holds planetary gear reduction system, and forward part is mainly held power output system.Ring is equipped with bearing 39 in the middle cover 37, and bearing 39 supports second planet carrier 47.
The power output system of this specific embodiment below is detailed.
Like Fig. 3, Fig. 4, Fig. 5, Fig. 7, Fig. 8, foregoing, second planetary gear 47 is fixedly connected with power output system, and is concrete, and second planet carrier 47 and main shaft 61 are fixedly connected through interference fit, and main shaft 61 is followed 47 rotations of second planet carrier all the time.
Power output system comprises that one is set in the active impact block 63 on the main shaft 61, the spin V-shaped groove beater mechanism of being located at the impact spring 65 between the active impact block 63 and second planet carrier 47 and being positioned at active 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 rolling in the V-shaped groove 611 outside; Be steel ball in this embodiment and be located at the interior V-shaped groove 631 that impact block 63 inner rings initiatively are used to accommodate spin 67.Initiatively radial symmetric convexes with a pair of first end tooth 633 on the front end face of impact block 63.Between impact spring 65 and active impact block 63, be provided with packing ring and pad.Initiatively the front end of impact block 63 also is provided with passive impact block 69, and the protrusion of radial symmetric is provided with a pair of second end tooth 693 on the relative rear end face of passive impact block 69 and impact block initiatively 63.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 the corresponding work head, and clamp fixing through chuck 9.Chuck 9 is set in working shaft 691 front ends.
Multi-functional brill 1 of the present invention also has torsion control system, is used for adjustable max. output torque that power output system is set when the screwdriver function.Torsion control system below is detailed.
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 the corresponding through hole of aforesaid a plurality of 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 a plurality of columns 751 corresponding with aforementioned through-hole, and column 751 passes the through hole of middle cover 37, the torque spring 73 on the butt protruded stigma 711.The rear end of housing is provided with a plurality of end teeth 753.Because column 751 passes 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 that the end tooth 753 with quiet end tooth 75 matches, and the rear end of housing is provided with keyway 771, and the inner ring surface of housing is provided with internal spline 775.The moved end tooth is being walked upwards and can not moved, at the optional rotatable and non-rotatable two states that has that makes progress in week.
Through the adjusting of function switched system, many merits of present embodiment are bored 1 and optional are had an impact wrench function, the high speed drill function, and low speed bores function, screwdriver function.The function switched system of present embodiment below is detailed.
Referring to Fig. 3, Fig. 4, Fig. 5, Fig. 6, the 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 toggle that is arranged in switching window 19 and the housing that extend into the semi-round ring shape of housing 3; The housing of function switching button 17 is arranged with and switches ring 81; Switch ring 81 and be sleeved on the back cover 35, and can be driven with respect to back cover 35 around axis 10 rotations by function switching button 17.Have a breach on the anchor ring of switching ring 81, switching spring 171 and fore-set 173 pass this breach and are arranged between function switching button 17 and the back cover 35.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 stayed in a recess, function switching button 17 stayed in a function corresponding gear.Be that the operator can stir function switching button 17 and circumferentially moves; Drive switching ring 81 through fore-set 173 and rotate, when moving to recess, switch spring 171 compressing fore-sets, 173 entering recess and tend to stay in this recess; This knee springing of operator's perception and know and got into a function gear; When needs change function, the elastic force drive fore-set 173 that the operator overcomes switching spring 171 leaves this another recess that needs of recess entering, and the drive switching encircles 81 rotations accordingly.
Impact wrench switches groove 811 and is the tortuous shape with ladder, is parallel to each other spaced apart in the axial direction straight trough and the composition of the link slot between two sections straight troughs by two sections.This two ends straight trough is perpendicular to axis 10.Impact wrench switch piece 83 housings can move axially and rotatable into strips.The one of which end is provided with pin, and pin is arranged in impact wrench and switches groove 811, and through the fit structure of this pin and groove, when switching ring 81 and rotating, pin switches in the groove 811 at impact wrench and moves to another section straight trough from one section straight trough, and drive impact wrench switch piece 83 moves axially.
The other end of impact wrench switch piece 83 is bent to form to the radially inner side of gear-box 13 and colludes, and colludes in the annular groove 891 that extend on the clutch part 89.Clutch part 89 is sleeved on outside second planet carrier 47, housing circlewise, annular groove 891 is positioned on its outer peripheral face.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 second planet carrier 47 is provided with the slide rail 473 that matches with slide block 893, clutch part 89 thereby follow the rotation of second planet carrier 47 all the time, and can move axially by relative second planet carrier 47.Initiatively the rear end face of impact block 63 is provided with the clutch slot 635 that matches with clutch block 895.Through aforesaid structure, front position on clutch part 89 has axially and position, back, clutch block 895 blocks clutch slot 635 in the front position, and clutch block 895 breaks away from clutch slot 635 in the position, back.Through switching ring 81, impact wrench switch piece 83 drives between front position and position, back and moves clutch part 89 by function switching button 17.
Similarly, speed is switched groove 813 and is the tortuous shape with ladder, is parallel to each other spaced apart in the axial direction straight trough and the composition of the link slot between two sections straight troughs by two sections.This two ends straight trough is perpendicular to axis 10.Speed switch piece 85 housings can move axially and rotatable into strips.The one of which end is provided with pin, and pin is positioned at speed and switches groove 813, and through the fit structure of this pin and groove, when switching ring 81 and rotating, pin switches in the groove 813 in speed and moves to another section straight trough from one section straight trough, and drive speed switch piece 85 moves axially.
The other end of speed switch piece 85 is bent to form to the radially inner side of gear-box 13 and colludes, and colludes in the annular groove 533 of the outer peripheral face that extend into second ring gear 53.Also be provided with spline 531 on the front end face of second ring gear 53, the internal spline 775 of this spline 531 and moved end tooth 77 matches.Foregoing, second ring gear 53 has front position and position, back, corresponding respectively two kinds of speed output.Cooperate above-mentioned structure, through switching ring 81, speed switch piece 85 drives between front position and position, back and moves second clutch part 53 by function switching button 17.
Screwdriver switches groove 815 for for to have the irregularly shaped of ladder, upwards has wide and narrow portion week, and narrow front end is back in the axial direction in wide front end.Has transition portion between wide and narrow.Screwdriver switch piece 87 is in strip, and can move axially and rotatable.One end has the pin that is arranged in screwdriver switching groove 815, also is provided with spring 871 between this end and the 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.Through this pin and the fit structure of groove, when switching ring 81 and rotating, pin switches in the groove 815 wide at screwdriver and moves to narrow or from narrow mobile wide portion, drive screwdriver switch piece 85 moves axially.Screwdriver switch piece 85 thus have axially on front position and position, back, the keyway 771 of the end of screwdriver switch piece 85 engagement moved end tooth 77 when the front position, the end of screwdriver switch piece 85 breaks away from the keyway 771 of moved end tooth 77 when the position, back.Through this mode rotatablely moving of locking moved end tooth 77 optionally.
The function handoff procedure of multi-functional brill 1 below is detailed.
Foregoing, multi-functional brill 1 can be in the impact wrench function, the high speed drill function, and low speed bores function, switches forward or backwards successively between the screwdriver function.The conversion of these functions and 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 the aforesaid four kinds of functional statuses and second ring gear 53, the corresponding relation of clutch part 89 and screwdriver switch piece 87 position separately.
| |
|
|
|
| The impact wrench function | Back position | Back position | The front position |
| The high speed drill function | Back position | The front position | The front position |
| Low speed bores function | The front position | The front position | The front position |
| The screwdriver function | The front position | The front position | Back position |
Table one
With the impact wrench function is original state, like Figure 10, and Figure 11, function switching button 17 is in the impact wrench gear, and second ring gear 53 is positioned at the position, back, and clutch part 89 is positioned at the position, back, and screwdriver switch piece 87 is positioned at the front position.
Foregoing, when second ring gear 53 is positioned at the position, back, mesh the sun gear 45 and second planetary gear 49 simultaneously, planetary gear reduction system is exported high rotating speed to power output system.And the internal spline 775 of the spline 531 of second ring gear 53 and moved end tooth 77 breaks away from each other at this moment, and second ring gear 5 can be by sun gear 45 driven rotary.Screwdriver switch piece 87 is in the front position at this moment, and its end snaps in the keyway 771 of moved end tooth 77, forbids that moved end tooth 77 rotates.Yet therefore be provided with screwdriver switch piece 87 to such an extent that under this functional status be in back position also be fine because moved end tooth 77 does not work this moment, can not influence the realization of impact wrench function.
When realizing the impact wrench function; Rotatablely move and output to main shaft 61 via second planet carrier 47; Because the pressure of impact spring 65, initiatively impact block 63 drives through the spin 67 that is sandwiched in interior V-shaped groove, outer V-shaped groove 611, follows main shaft 61 and rotates; Passive impact block 69 also rotates thereupon, drives working head (not shown) through working shaft 691 with chuck 9 and rapidly nut (not shown) is tightened.
After nut end face and workpiece (not shown) face contacted, the moment of resistance increased sharply, reach certain value after; Intermeshing active impact block 63 all is obstructed with passive impact block 69; Passive impact block 69 stops operating, but main shaft 61 still rotates under the driving of motor output shaft, forces spin 67 to overcome it and moves along trough roller with the frictional force between interior V-shaped groove, the outer V-shaped groove 611; Impact block 63 rearward moves thereby promote initiatively, and impact spring 65 is compressed.Thus, active impact block 63 is in the axial direction gradually away from passive impact block 69.After active impact block 63 moves axially the tooth depth apart from second end tooth 693 that just surpasses passive impact block 69; I.e. initiatively impact block 63 and 69 out-of-gear moments of passive impact block, main shaft 61 drive just initiatively that impact block 63 rotates, and make its first end tooth 633 slip over second end tooth 693 of passive impact block 69; Slipping over moment; Because the effect of impact spring 65, spin 67 are got back to original position along interior V-shaped groove, outer V-shaped groove 611 again, initiatively impact block 63 is pushed away forward; Impact second end tooth 693 of passive impact block 69 simultaneously along with main shaft 61 acceleration rotations; Make passive impact block 69 on direction of rotation, continue motion, so move in circles, screw element is tightened under impact moment.
During above-mentioned realization impact wrench function; Need the initiatively passive impact block 69 of impact block 63 rotary impacts at intermittence; Thereby make the working head (fastener head) can fastening nut, but realizing creeping into function, promptly during 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 impact of impact block 31.Below detail and switch to the process of high speed drill function and the duty of high speed drill function from the impact wrench function.
With reference to Figure 10; Figure 11 and Figure 12, shown in Figure 13, when the impact wrench function switches to the high speed drill 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 and move axially, and then drive clutch part 89 and move to the front position from the position, back.After accomplishing switching, second ring gear 53 is positioned at the position, back, and clutch part 89 is positioned at the front position, and screwdriver switch piece 87 is positioned at the front position.
Because therefore be provided with screwdriver switch piece 87 to such an extent that under this functional status be in back position also be fine because moved end tooth 77 does not work this moment, can not influence the realization of high speed drill function.
Foregoing; After clutch part 89 is positioned at the front position; 895 engagements of its clutch block are the clutch slot 635 of impact blocks 63 initiatively, and the transfer route of rotation output becomes by second planetary gear 47 and/or main shaft 63 to clutch part 89 to active impact block 63, is delivered to working shaft 691 through passive impact block 69 again.Concrete, in drilling process, because the moment of resistance that working shaft 691 receives increases gradually, initiatively 63 of impact blocks tend to towards motor 11 motions.At this moment; Because clutch part 89 has limited the moving backward in the axial direction of impact block 63 initiatively; First end tooth 633 of impact block 63, second end tooth 693 of passive impact block 69 of fitting all the time initiatively, simultaneously, initiatively impact block 63, passive impact block 69, working shaft 691 motion together on direction of rotation.Because passive impact block 69 can't break away from active impact block 63 all the time, promptly can't form impact between the two, continues to creep into so can guarantee working head.
In the above-mentioned embodiment; The particularly important is: when realizing that high speed drill or low speed bore function; Rotation process by motor 21 outputs is slowed down; Arriving the output 22 of deceleration system, be that middleware is delivered to initiatively impact block 63 with clutch part 89 then, is rigidly connected in other words to the fixed connection of impact block 63 initiatively with this output of having set up deceleration system and rotates with transmission; Because the output of main shaft 61 and deceleration system is fixed together through interference fit, also we can say and set up being fixedly connected of main shaft 61 and active impact block 63.And power tool is in the past being switched to by the impact wrench function when creeping into function, all be still rely on main shaft 61 and initiatively the flexible connection of the groove between the impact block 63 and ball system transmit and rotate.
Industry average technical staff expect easily, and 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 linking to each other on direction of rotation; A part of selectable and initiatively impact block 63 engagements or disengaging through spline fitted; Under drill mode (comprising that high speed drill function and low speed bore function), set up main shaft 61 to being fixedly connected of active impact block 63 with this, the thinking of this embodiment is identical with aforesaid the preferred embodiments of the present invention, and its concrete form repeats no more.
Expect equally easily; Clutch part 89 can also be fixedly connected with active impact block 63 so that the form that is different from spline fitted is selectable; Also can adopt the form and second planet carrier 47 or the main shaft 61 relatively-stationary cooperation in rotation that are different from the slide block slide rail, for example, adopt buckle and hole to cooperate; Perhaps projection and groove fit realize clutch part 89 and initiatively optional being solidly connected of impact block 63, adopt the cooperation of spline fitted realization clutch part 89 and second planet carrier 47 or main shaft 61 etc.
Below introduce the switching of brill function and the concrete mode of action that low speed bores function from the high speed drill function to low speed.
Like Figure 12, Figure 13 and Figure 14, Figure 15.When the high speed drill function switches to low speed and bores 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 and move axially, and then drive second ring gear 53 and move to the front position from the position, back.After accomplishing switching, second ring gear 53 is positioned at the front position, and clutch part 89 is positioned at the front position, and screwdriver switch piece 87 is positioned at the front position.
Foregoing, after second ring gear 53 moved to the front position from the position, back, the engagement of disengaging and sun gear 45 was still with 49 engagements of second planetary gear.Simultaneously; The spline 531 of second ring gear 53 and 775 engagements of the internal spline of moved end tooth 77; And screwdriver switch piece 87 is positioned at the front position at this moment; The end of screwdriver switch piece 87 snaps in the keyway 771 of moved end tooth 775, and moved end tooth 775 can not be rotatablely moved, and then second ring gear 53 can not be rotatablely moved.
Through above-mentioned fit system; Multi-functional brill 1 is positioned at low speed and bores under the function; Planetary gear reduction system outputs to power output system via foregoing double reduction with lower rotating speed, and the operating mode of power output system is consistent during with the high speed drill function, repeats no more at this.
Below introduce from low speed and bore function to the switching of screwdriver function and the concrete mode of action of screwdriver function.
Like Figure 14, Figure 15 and Figure 16, Figure 17.Bore function when switching to the screwdriver function from low speed; Switch ring 81 and rotate 815 displacements of drive screwdriver switching groove; With the pin of screwdriver switch piece 87 leniently portion move to narrow portion, thereby drive screwdriver switch piece 87 and move axially and arrive the position, back, break away from and the engagement of moved end tooth 77.After accomplishing switching, second ring gear 53 is positioned at the front position, and clutch part 89 is positioned at the front position, and screwdriver switch piece 87 is positioned at the position, back.
Foregoing, spiral cover 71 is through protruded stigma 711, and torque spring 73 is oppressed the column 753 of quiet end tooth 75, and wherein protruded stigma 711, and torque spring 73 is provided with column 753 one to one.Quiet end tooth 75 thereby by elasticity compressing butt moved end tooth 77, concrete, the end tooth 753 of quiet end tooth 75 and the end tooth of moved end tooth 77 773 are oppressed to mesh together, thereby stops moved end tooth 77 to rotate.This moment, quiet end tooth 75 was elements that unique direct prevention moved end tooth 77 rotates because screwdriver switch piece 87 breaks away from and the engagement of moved end tooth 77.
When carrying out the work of screwing; The operator drives spiral cover 71 through torsion cover 13 and moves forward and backward the decrement of regulating torque spring 73; Promptly regulate quiet end tooth 75 and be applied to the elastic force on the moved end tooth 77, to set the max. output torque of multi-functional brill 1 under the screwdriver function.Be rotated further the max. output torque of the moment of torsion of needs when ordering about working shaft 691 greater than setting; Second ring gear, 53 drive moved end teeth 77 overcome the rotation of elasticity forces; The quiet end tooth 75 of the promotion that goes round and begins again axially moves forward, and end tooth 773 and end tooth 753 be slope climbing movement each other.Be that moved end tooth 77 can not stop the rotation of second ring gear 53 again, thereby the output of motor only drives second ring gear 53 and rotate freely, and can not drive 47 rotations of second planet carrier, will rotatablely move outputs to power output system.
Claims (10)
1. power tool comprises:
Housing;
Motor is arranged in housing, has the output shaft that rotation output is provided;
Planetary gear reduction system is exported the back rotation output of slowing down with the rotation of said output shaft;
Power output system is delivered to working head with the rotation of planetary gear reduction system output;
Function switching button, part is contained in the housing at least, it is characterized in that, and said function switching button moves one of them of boring function, screwdriver function with the impact wrench function of selecting power tool, high speed drill function, low speed.
2. power tool according to claim 1 is characterized in that said function switching button has the primary importance that circumferentially is arranged in order along housing; The second place; The 3rd position and the 4th position, said function switching button can move to the 4th position successively from primary importance, or moves to primary importance successively from the 4th position; Power tool was in the impact wrench function when function switching button was positioned at primary importance; Said function switching button is positioned at second place power tool and is in the high speed drill function, and said function switching button is positioned at the 3rd position power tool and is in low speed brill function, and said function switching button is positioned at the 4th position power tool and is in the screwdriver function.
3. power tool according to claim 1 is characterized in that, the selectable primary importance that is positioned at of said function switching button; The second place; The 3rd position and the 4th position, power tool was in the impact wrench function when function switching button was positioned at primary importance, and said function switching button is positioned at second place power tool and is in the high speed drill function; Said function switching button is positioned at the 3rd position power tool and is in low speed brill function; Said function switching button is positioned at the 4th position power tool and is in the screwdriver function, and said primary importance, the second place, the 3rd position and the 4th position are positioned on the same circumference of housing, and it is to the straight line that projects into of horizontal plane.
4. power tool according to claim 1 is characterized in that,
Institute's speed planetary gear deceleration system comprises ring gear, and said 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; Said power output system comprises clutch part, and said clutch part is removable between the second place of primary importance that limits the impact wrench function and permission impact wrench function;
Said function switching button connects the spline part, and said spline part is removable between the second place of primary importance that limits the screwdriver function and permission screwdriver function;
Said function switching button also connects ring gear and clutch part, with impact wrench function, high speed drill function, low speed brill function and the screwdriver function of exercisable selection power tool.
5. power tool according to claim 4 is characterized in that, when being in the impact wrench function, said clutch part is positioned at the second place; When being in the high speed drill function, said ring gear is positioned at primary importance, and clutch part is positioned at primary importance; When being in low speed brill function, said ring gear is positioned at the second place, and clutch part is positioned at primary importance, and the spline part is positioned at primary importance; When being in the screwdriver function, said ring gear is positioned at the second place, and clutch part is positioned at primary importance, and the spline part is positioned at the second place.
6. power tool according to claim 5 is characterized in that, when being in the impact wrench function, said ring gear is positioned at primary importance, and the screwdriver function is positioned at primary importance; When being in the high speed drill function, said screwdriver is positioned at primary importance.
7. power tool according to claim 4; It is characterized in that; Said planetary gear reduction system comprises sun gear and the planetary gear that is engaged in the output gear of sun gear; Said ring gear meshes said sun gear and said planetary gear to export high rotating speed simultaneously at said primary importance ring gear, meshes said planetary gear at second place ring gear, breaks away from said sun gear with the output slow-speed of revolution.
8. power tool according to claim 4; It is characterized in that said power output system comprises main shaft, be assemblied in the active impact block on the main shaft through V-shaped groove spin mechanism; Said clutch part connects main shaft; Can move axially and can not relatively rotate with respect to main shaft, said clutch part directly exports initiatively impact block at the said active impact block of said primary importance clamping to the rotation with main shaft, and said clutch part breaks away from said active impact block in the said second place.
9. power tool according to claim 7 is characterized in that, also comprises the moved end tooth, and tooth engagement in when said ring gear is positioned at the second place and said moved end is upwards to lock the motion that rotates in a circumferential direction of the locking moved end tooth that said spline part is optional each other in week.
10. power tool according to claim 9; It is characterized in that; An end face of said moved end tooth is provided with a plurality of keyways of circumferential distribution, and said spline part engages said keyway at the end of said primary importance spline part, breaks away from said keyway at the end of said second place spline part.
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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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|---|---|---|---|
| CN201010239517.8A CN102335904B (en) | 2010-07-20 | 2010-07-20 | Power tool |
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| CN102335904B 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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| CN106541167A (en) * | 2015-09-21 | 2017-03-29 | 南京德朔实业有限公司 | Torsion exports instrument |
| CN106567919A (en) * | 2015-10-06 | 2017-04-19 | 唐向阳 | Planetary speed change mechanism |
| CN107009310A (en) * | 2016-01-28 | 2017-08-04 | 韦沃精密机械（上海）有限公司 | High low speed automatic switching control equipment and electric torsional spanner for electric torsional spanner |
| CN107921616A (en) * | 2015-07-31 | 2018-04-17 | 罗伯特·博世有限公司 | Hand held power machine |
| CN109027147A (en) * | 2018-08-23 | 2018-12-18 | 浙江皇冠电动工具制造有限公司 | The transmission device of hand held power machine |
| CN110561359A (en) * | 2018-06-06 | 2019-12-13 | 苏州宝时得电动工具有限公司 | Hand-held power tool and chuck assembly |
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