Detailed description of the invention
Fig. 1 illustrates the hand held power machine 100 being provided with instrument acceptance division 150, described hand held power machineThere is the housing 110 with handle 126.According to a form of implementation, hand held power machine 100 canIt is mechanically connected with accumulator battery 130 and electrically connects to power with being independent of electrical network.
One electric drive motor 114, the transmission dress powered by accumulator battery 130 is set within the case 110Put 118 and a mechanical percussion mechanism 122.Drive motor 114 such as can be grasped by hand switch 128Vertical, namely turn on and off, and to drive motor can be arbitrary motor type, such as electronicsCommuntation motor or d.c. motor.Preferably, drive motor 114 can be electronically controllable and regulate,Run so that reversing can not only be realized, and be capable of in terms of desired rotary speed pre-Fixed.The operation principle and the structure that suitably drive motor are the openest by prior art, thus thisIn succinctly save detailed description for description.
Motor 114 is driven to be connected with actuating device 118 by the motor drive shaft 116 attached troops to a unit, described transmissionThe rotation of motor drive shaft 116 is converted to be arranged between actuating device 118 and beater mechanism 122 by deviceThe rotation of drive shaft 120.This conversion is carried out the most as follows, i.e. drive shaft 120 relative toThe rotating speed that motor drive shaft 116 still reduces with the torque increased rotates.Exemplarily, motor 114 is drivenIt is arranged in motor shell 115 and actuating device 118 is arranged in gear mechanism housing 119, itsIn, gear mechanism housing 119 and motor shell 115 are exemplarily arranged within the case 110.
The mechanical percussion mechanism 122 being connected with drive shaft 120 be exemplarily rotary impact mechanism orPerson turns round beater mechanism, described rotary impact mechanism or revolution beater mechanism and produces and have high intensityThe rotation impulse of impulse form and this rotation impulse is delivered to output shaft 124, such as exports main shaftOn.Arranging instrument acceptance division 150 on output shaft 124, described instrument acceptance division is preferably configured for connecingReceive plug-in type instrument and according to a form of implementation can not only with outer polygon connection part 142Plug-in type instrument 140 connects, and can be connected with the plug-in type instrument with interior polygon connection part.Plug-in type instrument 140 is exemplarily configured with outer polygon connection part 142, exemplarily eight limits and couplesThe screwdriver head in portion.This screwdriver head is fully disclosed by prior art, thus herein for explanationThe clean purpose of letters saves detailed description.
Rise it is noted that hand held power machine 100 is exemplarily configured to accumulator rotary impact typeHandset.But the invention is not restricted to accumulator rotary impact type driver, but can apply in differenceElectric tool, in such as impact drill etc., can apply for producing in described electric toolThe mechanical percussion mechanism 122 of raw impact, passes through regardless of electric tool with whether can being independent of electrical networkAccumulator battery is run or is relied on electrical network ground and runs.
Fig. 2 show the actuating device 118 being arranged in gear mechanism housing 119 of Fig. 1 remote inSection, and the Jin Zhong district of the mechanical type rotating beater mechanism 122 according to Fig. 1 of a form of implementationSection.Rotary impact mechanism is exemplarily arranged in housing parts 222, and described housing parts is fixed onOn gear mechanism housing 119.
Actuating device 118 is exemplarily planetary driving device, and exemplarily have sun gear 209,At least one planetary gear 215,217, planet carrier or take moving part 218 and axially and radially going upThe hollow wheel 206 being arranged in gear mechanism housing 119 with not moving.Sun gear 209 exemplarily bySupporting arrangement 219 can be rotated to support in drive shaft 120.Take moving part 218 exemplarily with drivingAxle 120 single type ground structure, such as molding is on the driving shaft.Being alternative in this place, taking moving part 218 canTo be connected with drive shaft 120 by suitable attachment means.
According to a form of implementation, planetary driving device 118 can be changed between multiple levels and showCan change between first and second grades to example, wherein, the first order is by described sun gear 209, instituteState at least one planetary gear 215,217, described planet carrier or take moving part 218 and described hollow wheel 206Constitute.Succinct and clear for accompanying drawing, the second level 211 is only shown schematically.However it is necessary thatIt is noted that for professional and technical personnel in the field, suitable planetary driving device correspondingStructure has had been fully disclosed, thus can save detailed description here.
The bearing being configured to ball bearing is exemplarily set in the remote middle section of gear mechanism housing 119234, it is used for supporting drive shaft 120.It should be noted however that also can in the framework of the present inventionEnough apply other bearing types.Such as bearing 234 can also be implemented as sliding bearing, needle roller alternativelySet, roller bearing or other Rolling Bearing Types.
According to a form of implementation, the end face 299 at gear mechanism housing 119 arranges one and is allocated to instituteStating the pad 240 of mechanical type rotating beater mechanism 122, described pad has opening 242 and by being somebody's turn to doOpening rotatably and is axially displaceably bearing in drive shaft 120.Additionally, an impact body 225The most axially movably it is bearing in drive shaft 120.Between impact body 225 and pad 240 excellentSelection of land arranges a damping element 244 being exemplarily bearing in drive shaft 120, and at least one bagSpring element 228 that enclose drive shaft 120, that be exemplarily configured to compression spring, it is at Fig. 1Hand held power machine 100 impact run in produce impact.
At least one compression spring 228 described deviates from, at it, the pad that reclines on the end 227 of impact body 225Sheet 240, wherein, pad 240 can such as pass through injection molding technological forming to compression springOn 228.It is alternative in this place, compression spring 228 and pad 240 to construct with single type.Pressure bulletThe end 226 in the face of impact body 225 of spring 228 is arranged in impact body 225, as following at Fig. 3As described in.
According to a form of implementation, compression spring 228 is supported on pad 240 and direction in distanceUpper, that is direction towards the instrument acceptance division 150 of Fig. 1 load impact body 225, as with arrowAs 229 represent.Fig. 1 hand held power machine 100 properly functioning in, say, that asFruit need not produce impact, then impact body 225 in remote shown in Fig. 2 in terminal location with drive shaft120 rotate together.
In the impact of the hand held power machine 100 of Fig. 1 runs, at mechanical type rotating beater mechanism 122When producing impact, the power of impact body 225 renitency spring 228 axially towards direction near, the most justIt is to say that the direction towards pad 240 is moved.In order to avoid impact body 225 exceedingly to move axially at this,This impact body is damped element 244 locking in the axial direction in predetermined near middle terminal location, wherein,Impact body 225 is fallen towards the impact of damping element 244 by the damping of this damping element.Then, in order to produceImpact, impact body 225 again by compression spring 228 impact type to resilience move shown in Fig. 2 remoteIn middle terminal location.Because the operation principle of mechanical percussion mechanism and being produced by this beater mechanismImpact has had been fully disclosed for professional and technical personnel in the field, so herein for descriptionSuccinct purpose and save detailed description.
Fig. 3 illustrates the mechanical type rotating beater mechanism 122 of Fig. 1 and Fig. 2 according to a form of implementationRemote in section, it has the impact body 225 being bearing in drive shaft 120, and described impact body is by pressureSpring 228 loads towards the direction of output shaft 124.This output shaft is by being provided with the flange of output cam324 with drive shaft 120 rotatable movement couple.
According to a form of implementation, impact body 225 is configured to a pot shape, and it has the base area section 398 of annular,The end face 330 in the face of output shaft 124 of this base area section is at hand held power machine 100 normal of Fig. 1Recline in operation flange 324.In the base area section 398 be configured with central opening 399 in molding inside oneThe wall section 334 of the outside annular of the wall section 332 and of annular, the annular wall district of described insideThe wall section of section and outside annular forms one in figure 3 in the face of compression spring together with base area section 398The annular groove 336 of 228.
The end 226 in the face of impact body 225 of described compression spring 228 is arranged on described annular groove 336In, described end exemplarily reclines ring plate 360, and described ring plate can be fixed on compression spring 228Or may be molded on compression spring.Compression spring 228 is towards the direction loaded ring of base area section 398Sheet 360, and therefore direction towards flange 324 preferably abuts against the pressure being arranged in annular groove 336Ball bearing 350.This pressure ball bearing preferably has generally U-shaped load-carrying ring 352, in described carryingRing arranges multiple ball 354,356.Ring plate 360 reclines load-carrying ring 352 and the most described ball 354,356 against base area section 398.It should be noted however that ring plate 360 is used only for realizing at pressure ballOn bearing 350 more preferable pressure support distribution and therefore mechanical type rotating beater mechanism there is no ring plateThe configuration of 360 is also possible, compression spring 228 in the face of the end of impact body 225 in this configuration226 directly against depended on pressure ball bearing 350.
According to a form of implementation, pressure ball bearing 350 is configured to the hand held power machine at Fig. 1The impact of 100 makes the impact body 225 can when mechanical type rotating beater mechanism 122 produces impact in runningRotate relative to compression spring 228.Here, impact body 225 preferably with the U of pressure ball bearing 350Shape load-carrying ring 352 rotates relative to drive shaft 120 together, wherein, and the ball 354,356 of pressure ball bearingRing plate 360 rolls.
Fig. 4 illustrates at least one compression spring 228 described in the rotary impact mechanism 122 of Fig. 1 to Fig. 3Spring force-spring travel-measurement figure, wherein, exemplarily, the vertical coordinate measuring figure is described bulletSpring force F and on the horizontal scale description spring travel s.Preferably, compression spring 228 has at least twoIndividual spring constant Fc1, Fc2 different, that there is spring travel s1 or s2 attached troops to a unit, described bulletSpring stroke is represented by first area I and second area II in the diagram.Spring constant Fc1, Fc2 canTo be preferably adapted to rotary impact mechanism 122 or to adapt to the application set, and the most at leastBe essentially prevented from impact the runs impact body 225 of Fig. 2 and Fig. 3 excessive move axially and/orThe excessive reset force of impact body 225 or the shock of impact body 225.
Exemplarily, the first spring constant Fc1 is less than the second spring constant Fc2, thus in little impactIn the application of power or fast impact velocity, the most only the first spring constant Fc1 is used.Thus,Impact body 225 can be stoped exceedingly to move axially.In the application needing high impact forces, the twoSpring constant Fc1, Fc2 are used, and the most preferably, spring constant Fc1 at least reduces and excellentChoosing stops excessively moving axially of impact body 225, and/or preferably, spring constant Fc2 at least reducesAnd preferably stop excessive reset force or the shock of impact body 225 of impact body 225.Need to refer toGoing out, two spring constant Fc1 in Fig. 4, the layout of Fc2 only has exemplary characteristic alsoAnd it is not intended as limitation of the present invention.Therefore the first spring constant Fc1 can also be normal more than the second springNumber Fc2.
The first spring constant Fc1 shown in the I of first area exemplarily has what approximately linear roseOr straight characteristic curve 401 and the second spring constant Fc2 shown in second area II are exemplaryGround has that approximation index rises or cumulative characteristic curve 402.It is pointed out that spring constantThe configuration of Fc1, Fc2 or their characteristic line only have exemplary characteristic and are not intended as thisThe restriction of invention.Therefore, the characteristic curve 401,402 of compression spring 228 can have straight, cumulativeAnd/or the trend of regressive.Additionally, the two characteristic curve 401,402 can also have identical trend,It is to say, the two characteristic curve 401,402 can such as have with different slopes or springThe straight trend of constant.
Fig. 5 a illustrates the flange 324 that is bearing in drive shaft 120 with impact body 520 and Fig. 3Rotary impact mechanism 122.According to a form of implementation, impact body 225 class of impact body 520 and Fig. 2As construct, but there is the inner wall section 332 comparatively speaking shortened.Additionally, compression spring 228Type structure according to volute spring 510 has wide first end 512 and narrow the second end 514, instituteState volute spring and preferably there is the spring constant of the spring force-spring travel-measurement chart corresponding to Fig. 4Fc1, Fc2.Exemplarily, the first end 512 of spring 510 is the end in the face of impact body 520226, described end is arranged in fig 5 a in impact body 225 and preferably with Fig. 3 and reclines similarlyIn ring plate 360.Additionally, the second end 514 of spring 510 abuts in the support of drive shaft 120On face 522.
Fig. 5 b illustrates the rotary impact mechanism 122 of the volute spring 510 with impact body 520 and Fig. 5 a,Wherein, according to another form of implementation, the narrow the second end 514 of spring 510 is in the face of impact bodyThe end 226 of 520.Here, the second end 514 of spring 510 is arranged in impact body 225 andPreferably abut in similarly in ring plate 360 with Fig. 3 and Fig. 5 a.Additionally, the first end of spring 510512 abut on the supporting surface 522 of drive shaft 120.
Fig. 6 a illustrates the flange being bearing in drive shaft 120 of the impact body 225 and Fig. 3 with Fig. 2The rotary impact mechanism 122 of the compression spring 228 according to the second form of implementation structure of 324 and Fig. 2.Here, compression spring 228 is according to having at least two, exemplarily first and second single spring elementsThe type structure of the spring system 605 of 610,620, wherein, the two list spring element 610,620Having different spring constant Fc1, Fc2, described different spring constant preferably corresponds to the bullet of Fig. 4Spring force-spring travel-measurement chart.
According to a form of implementation, said two list spring element 610,620 is connected in parallel to each other setting, itsIn, the two list spring element 610,620 is arranged on one another.Here, in Fig. 6 a, secondSingle spring element 620 is arranged in first single spring element 610, wherein, and first single spring element 610It is arranged between the ring plate 360 of impact body 225 and the supporting surface 522 of drive shaft 120.Additionally, theThat two single spring elements 620 are arranged on supporting surface 522 and impact body 225 or inner wall section 332Between the end 602 of drive shaft 120.
Preferably, in the initial position of impact body 225, first single spring element 610 abuts in punchingHit in body 225 or ring plate 360, and second single spring element 620 with predetermined spacing 630 withThe end 602 of impact body 225 or impact body 225 is arranged at interval.Preferably, second single bulletSpring element 620 has the spring constant Fc2 bigger than first single spring element 610 at this.Therefore, in punchingHitting in operation, first single spring element 610 is first by application of load and compressed, and have compressedAfter predetermined spacing 630, two single spring elements 610,620 are all by application of load, thus, asAs described in Fig. 4, can at least reduce and preferably stop excessive axially the moving of impact body 225Dynamic and/or the excessive reset force of impact body 225 or the shock of impact body 225.
Fig. 6 b illustrates the rotary impact mechanism 122 of the spring system 605 with Fig. 6 a, wherein, firstSingle spring element 610 is arranged in second single spring element 620.Here, second single spring element 620Be arranged on supporting surface 522 and impact body 225 or outer wall section 334 in the face of drive shaft 120Abut on support component 640 between end 602 and in its opposed end.Support component 640Preferably according to the type structure of ring plate and be arranged on the supporting surface 522 of drive shaft 120.Preferably,First and/or second single spring element 610,620 can with support component 640 single type be connected.ButBe support component 640 can also with drive shaft 120 single type be connected.Additionally, support component 640The single spring element 610 of drive shaft 120, first and/or second can also be molded into, on 620.With Fig. 6 aSimilarly, preferably to have the spring bigger than first single spring element 610 normal for second single spring element 620Number Fc2.
Fig. 7 a illustrate Fig. 2's and Fig. 3 or Fig. 6 a's and Fig. 6 b, the rotation with spring system 705Turning beater mechanism 122, described spring system is provided with at least two, exemplarily first and second single bulletsSpring element 720,730.Here, said two list spring element 720,730 preferably has different bulletsSpring constant Fc1, Fc2, described different spring constant preferably corresponds to the spring force-spring travel of Fig. 4-measure chart.Here, two single spring elements 720,730 are arranged the most in series with each other, itsIn, said two list spring element successive ground is arranged, the most exemplarily self groundArrange.
According to a form of implementation, said two list spring element 720,730 is by intermediary element 710Coupled to each other.Here, first single spring element 720 be arranged on impact body 225 ring plate 360 and inBetween element 710 between the side 711 of impact body 225 and second single spring element 730 is arrangedIn the side 712 in the face of drive shaft 120 of the supporting surface 522 of drive shaft 120 and intermediary element 710 itBetween.Intermediary element 710 is preferably according to the type structure of ring plate.Preferably, first and/or second single bulletSpring element 720,730 may be molded in intermediary element 710 or with this intermediary element single type evenConnect.Additionally, first single spring element 720 preferably has the spring bigger than second single spring element 730Constant Fc1.
Fig. 7 b illustrates the rotary impact mechanism 122 of the spring system 705 with Fig. 7 a, wherein, secondSingle spring element 730 is arranged on faced by ring plate 360 and the intermediary element 710 of impact body 225 nowBetween the side 711 of impact body 225, and first single spring element 720 is arranged on drive shaft 120 nowSupporting surface 522 and intermediary element 710 in the face of drive shaft 120 side 712 between.Here, theOne single spring element 720 the most preferably has the spring bigger than second single spring element 730 with Fig. 7 aConstant Fc1.
Fig. 7 c illustrates the spring force-spring travel-measurement chart of the spring system 705 of Fig. 7 a and Fig. 7 b,Wherein, in figure on the vertical scale the spring force F (unit is newton) of depicted example at this measurement chartAbscissa on the spring travel s (unit is millimeter) of depicted example.Preferably, spring system 705There are two spring constant Fc1, Fc2 different, that have spring travel s1 or s2 attached troops to a unit,Described spring travel represents similarly by first area I and second area II with Fig. 4 in figure 7 c.With single spring element 720,730 arrange or they spring constant Fc1, Fc2 independently, excellentIt is selected in impact operation, first there is single spring element of less spring constant by application of load or quiltCompression, and another single spring element or two single spring elements be jointly or simultaneously afterwardsGround is by application of load.
Exemplarily, the first spring constant Fc1 shown in the I of first area has approximately linear risingOr straight characteristic curve 701 and the second spring constant Fc2 example shown in second area IIProperty ground there is that approximation index rises or cumulative characteristic curve 702.It is pointed out that spring constantThe value illustrated of spring travel s1 or s2 that be Fc1, Fc2 or that attach troops to a unit only has exemplaryCharacteristic and be not intended as limitation of the present invention.
Fig. 8 a illustrates the rotary impact mechanism of the spring system 705 and intermediary element 710 with Fig. 7 a122, wherein, intermediary element 710 is provided with for regulating initial spring constant according to an embodimentGovernor motion 810.Here, there is at least one for regulating the governor motion 810 of initial spring constantThe locking element 820 loaded by springing.
In the impact of rotary impact mechanism 122 runs, the form of implementation shown in Fig. 8 a needs heightInitial spring constant, described high initial spring constant is by by governor motion 810 this example of pretensionProperty first single spring element 720 realize.Here, the single spring element of locking element 820 locking secondPart 730, and when exceeding predetermined spring force, locking element 820 unlocks second single spring element730 or the single spring element of release second, thus, the spring constant Fc2 in the II of region is the leastSpring constant Fc1 in the I of region, or there is less slope.
Fig. 8 b illustrates the spring force-rows of springs of the spring system 705 of Fig. 8 a with governor motion 810Journey-measurement chart, wherein, in figure, on the vertical coordinate measuring chart, the spring force F of depicted example is (singlePosition is for newton) and the spring travel s (unit is millimeter) of depicted example on the horizontal scale.According toThe present invention, spring system 705 have two different, there is spring travel s1 or s2 attached troops to a unitSpring constant Fc1, Fc2, described spring travel in figure 8b with Fig. 4 and Fig. 7 c similarly byFirst area I and second area II represents.Exemplarily, the first spring shown in the I of first areaConstant Fc1 has approximately linear rises or straight characteristic curve 801, and described characteristic curve is due at the beginning of highBeginning spring constant has the biggest slope, and the second bullet shown in second area IISpring constant Fc2 has same approximately linear rises or straight characteristic curve 802, described characteristic curve due toLocking element 820 has the least slope.It is pointed out that spring constant Fc1, Fc2Or the value illustrated of spring travel s1 or s2 attached troops to a unit only there is exemplary characteristic and notIt is considered as limitation of the present invention.It is furthermore pointed out that the configuration of spring constant Fc1, Fc2 orTheir characteristic curve the most only has exemplary characteristic and is not intended as limitation of the present invention.CauseThis, characteristic curve 801, the 802 (characteristic curve 401,402 and Fig. 7 c with Fig. 4 of compression spring 228Characteristic curve 701,702 similarly) can have straight, the cumulative and/or trend of regressive.
Figure 9 below a to 9d illustrates for realizing compression spring 228 and/or the list of spring system 705Spring element 610,620, exemplary spring element (910 in Fig. 9 a, the figure of 710,720In 9b 920,930 in Fig. 9 c, 940 in Fig. 9 d), described spring element is respectively provided with notThat become or the variable spring diameter (D in Fig. 9 a；D1, D2 in Fig. 9 b and Fig. 9 d) and/Or the constant or variable turn separation (h in Fig. 9 a；H1, h2 in Fig. 9 b and Fig. 9 c).
Fig. 9 a illustrates the spring element 910 according to the first form of implementation.Spring element 910 preferably hasThere is constant spring diameter D and constant turn separation h.
Fig. 9 b illustrates a spring element 920, and it has variable spring diameter according to the second form of implementation(that is at least one first and second spring diameter D1, D2) and variable turn separation are (the most justIt is to say at least one first and second turn separation h1, h2).Preferably, spring element 920 has threeIndividual region I, II, III, wherein, region I and region III constructs the most in the same manner and region II is preferredIt is arranged between region I and region III.Exemplarily, region I and region III is provided with spring diameterD1 and turn separation h1, and region II has spring diameter D2 and turn separation h2, and wherein, spring is straightFootpath D1 is exemplarily exemplarily less than turn separation h2 less than spring diameter D2 and turn separation h1.It is pointed out that the configuration illustrated in figure 9b of spring element 920 only has exemplary spyProperty and be not intended as limitation of the present invention.Therefore, spring element 920 and following spring element(930 in Fig. 9 c, 940 in Fig. 9 d) can also have the region of two or more than three.Additionally, spring diameter D1 can be more than turn separation more than spring diameter D2 and/or turn separation h1h2。
Fig. 9 c illustrates a spring element 930, and it has constant spring diameter according to the 3rd form of implementationD and variable turn separation (that is at least one first and second turn separation h1, h2).With figureSimilarly, spring element 930 has three regions I, II, III, wherein, region I and region III to 9bStructure and region II are preferably provided between region I and region III the most in the same manner.Exemplarily,Region I and region III is provided with turn separation h1, and region II has turn separation h2, wherein, circleSpacing h1 is preferably smaller than turn separation h2.But turn separation h1 can also be more than turn separation h2.
Fig. 9 d illustrates a spring element 940, and it has constant turn separation h according to the 4th form of implementationWith variable spring diameter (that is at least one first and second spring diameter D1, D2).WithSimilarly, spring element 940 has three regions I, II, III, wherein, region to Fig. 9 b and Fig. 9 cI and region III constructs the most in the same manner and region II is preferably provided between region I and region III.Exemplarily, region I and region III is provided with spring diameter D1, and region II to have spring straightFootpath D2, wherein, spring diameter D1 is preferably smaller than spring diameter D2.But, spring diameter D1 is alsoSpring diameter D2 can be more than.
Typically, these exemplary spring elements (910 in Fig. 9 a, 920 in Fig. 9 b, figureIn 9c in 930 and Fig. 9 d 940) there is circular spring wire profile.It should be noted however thatThe spring wire profile of this circle only has exemplary characteristic and is not intended as limitation of the present invention.Therefore, corresponding spring element can also have oval or angular, the spring of such as rectangleSilk profile.