CN101352849A - Working tool - Google Patents
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- CN101352849A CN101352849A CNA2008101095677A CN200810109567A CN101352849A CN 101352849 A CN101352849 A CN 101352849A CN A2008101095677 A CNA2008101095677 A CN A2008101095677A CN 200810109567 A CN200810109567 A CN 200810109567A CN 101352849 A CN101352849 A CN 101352849A
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Abstract
The present invention provides a technique that contributes to improvement of the vibration reducing performance of a dynamic vibration reducer in a power tool while realizing reduction in size of the dynamic vibration reducer. A representative power tool which linearly drives a tool bit to perform a predetermined operation on a workpiece includes a tool body and a dynamic vibration reducer. The dynamic vibration reducer has a weight and an elastic element. The weight has an internal space that extends in the axial direction of the tool bit from at least one end of the weight in said axial direction. One end of the elastic element is inserted and received in the internal space, while the other end of the elastic element is placed on the tool body directly or via the body side member.
Description
Technical field
The present invention relates to a kind of damping technology of power tool, this power tool is the instrument along the linear drives front end tool as electric hammer or electric hammer brill etc.
Background technology
The structure of the electric hammer with damper mechanism is disclosed in Japan Patent 2004-154903 communique (patent documentation 1).In this electric hammer in the past, have moving bump leveller as vibration absorber, the vibration of electric hammer when realizing thus reducing the electric hammer operation, above-mentioned vibration absorber reduces the vibration at long axis direction of the electric hammer head (hammer bit) that is accompanied by the electric hammer operation and produces.Moving bump leveller has counterweight, constitutes the electric hammer vibration when reducing the electric hammer operation by the motion of this counterweight on the long axis direction of front end tool, and above-mentioned counterweight is in that be subjected to can rectilinear motion under the state of helical spring active force.
In moving bump leveller in the past, counterweight forms the long column shape that large-diameter portion and minor diameter part are linked into an integrated entity, simultaneously on the peripheral part of minor diameter part, be provided with helical spring, thus when guaranteeing counterweight weight, can realize the stability of counterweight action when mobile on the long axis direction of front end tool.
Yet, in order to advance the low vibrationization of electric hammer, need to improve the vibration damping of moving bump leveller, promptly improve the damping force (with the reverse opposite effect power of direction of vibration) of moving bump leveller.But, because in the moving bump leveller in the past with counterweight mutually the helical spring of specific density low (because spring portion between have axial gap) be positioned at the outside side, so from the viewpoint of the weight of guaranteeing counterweight, space utilization efficient is low.Therefore, improve vibration damping if increase the weight of counterweight, maximizations that just become of moving bump leveller, thereby in big setting (loading) space of power tool side needs.
Patent documentation 1:JP spy opens the 2004-154903 communique
Summary of the invention
The present invention puts in view of the above-mentioned problems and makes, and its purpose is to provide a kind of power tool, the densification of the moving bump leveller that is used to realize on the power tool and is loaded, and help to improve vibration damping.
In order to solve the above problems, the preferred mode of power tool institute of the present invention is by the linear drives front end tool, and the processing operation that this front end tool is put rules into practice is characterized in that, has tool body and moving bump leveller.As power tool of the present invention, comprise that as electric hammer electric hammer bores, scroll saw, the rectilinear motion that passes through front end tool of reciprocating saw etc. is processed the power tool of operation to machined material.Moving bump leveller has: counterweight, and it is installed on the tool body or is installed on the main body side member that is fixedly arranged at tool body, and can carry out rectilinear motion on the front end tool long axis direction; Elastic component, it is supported on counterweight on tool body or the main body side member with compressive state, and moving bump leveller is by counterweight rectilinear motion on the front end tool long axis direction, and the above-mentioned tool body during to the processing operation carries out vibration damping.In addition, above-mentioned counterweight has and begins the inner space of extending to this long axis direction from the end of at least one side of the long axis direction of front end tool.And, distolateral being inserted in the inner space on the long axis direction of the front end tool of elastic component, opposite side is arranged on tool body or the main body side member.
In addition, the optimal way of " the main body side member " among the present invention comprises the mode of the setting that becomes one with tool body and can be arranged in the mode on the tool body any with freely loading and unloading.In addition, be not limited only to the long axis direction of front end tool about " linear movement direction of counterweight " of the present invention, the component that is included in the front end tool long axis direction at least gets final product.In addition, " counterweight " among the present invention preferably be contained in tool body or the hollow bulb that in the main body side member, forms in, and with the surface contact state of the internal face of this hollow bulb, promptly utilize sliding surface to relatively move.In addition, in general, helical spring is equivalent to " elastic component " among the present invention.Also have, in general, the space in circular cross section is equivalent to " inner space " among the present invention, and the space of the hollow form beyond the space of the hollow form of cross section circle and the cross section circle is also included within above-mentioned " inner space " lining.
According to the present invention, by in counterweight, forming the inner space that extend forward end instrument major axis side, and elastic component is inserted and is provided with (ccontaining) in this inner space, can be in the arranged outside of elastic component higher counterweight than this elastic component density.Its result compares than the structure of the low density elastic component of this counterweight with the arranged outside at elastic component, can increase the weight of counterweight, thereby can improve the vibration damping of moving bump leveller.On the other hand, when elastic component being arranged in the inner space of counterweight, under the situation that elastic component is made of helical spring, its diameter diminishes.When helical spring diameter diminished, the stress that is produced also diminished, and therefore, can keep helical spring durability spring force is strengthened, and can further improve vibration damping.
The counterweight of moving bump leveller is generally to be mounted as sliding surface and mode that at least can straight line moves on the front end tool long axis direction with the contact-making surface of tool body or main body side member, but according to the present invention, because constitute in mode in the arranged outside counterweight of elastic component, so utilize the counterweight that is positioned at this elastic component outside, can on the moving direction of tool body or main body side member, form long sliding surface, or on moving direction, form a plurality of slippers with long interval.Its result can easily guarantee the operating stably of counterweight.
In addition, as mentioned above, utilization is positioned at the counterweight in the outside of elastic component, can form sliding surface with respect to tool body or main body side member, direction meanwhile from intersecting with the front end tool long axis direction, overlap length between counterweight and the elastic component can be provided with longer, therefore, can shorten the direction of principal axis length of moving bump leveller integral body and make its densification.
According to another kind of constituted mode of the present invention, counterweight has: first position that forward end instrument long axis direction extends; Cover second position on every side of the bearing of trend at first position; At least a portion on the bearing of trend at second position is connected to the connecting portion at first position; The space that is surrounded by first position, second position and connecting portion has constituted the inner space, and in addition, first position is made of different members with second position.In addition, " first position " among the present invention generally is made of cylindrical member, but preferably in a distolateral step-like column with large-diameter portion of the pars intermedia or the long axis direction of long axis direction.In addition, " connecting portion " among the present invention connects first position and second position at least, so that their one on the long axis direction of front end tool move.In addition, " second position " among the present invention generally is made of the member with circular tube hole, but also is applicable to and comprises circle, ellipse, polygon, or in the semicircle etc. any.
According to the present invention, counterweight constitutes in the mode that has first position and cover second position at this first position, and above-mentioned first position is made of different members with second position, thereby can process individually first and second position.Therefore, the processing operation becomes easy.
According to the another kind of mode of power tool of the present invention, first position is made of different materials with second position.When adopting this formation, counterweight with to for tool body or main body side member under the situation that the mode of sliding on the front end tool long axis direction constitutes, with respect to tool body or main body side member and the material at second position of sliding, needing consideration sliding or antiwear characteristic to wait determines, on the other hand, for the material of the first that is covered by second position, main to guarantee that the weight that vibration damping is used is that purpose determines.That is,, can use the material that meets functional requirement separately to form first and second position according to the present invention.
According to the another kind of mode of power tool of the present invention, counterweight has: from a distolateral beginning of front end tool long axis direction first inner space to another distolateral extension; To second inner space of a distolateral extension, from the direction of intersecting with bearing of trend, first inner space and second inner space overlap each other from another distolateral beginning of front end tool long axis direction.In addition, " from the direction of intersecting with bearing of trend, first inner space and second inner space overlap each other " among the present invention be, when bearing of trend is made as fore-and-aft direction, and the mode that on above-below direction, left and right directions or Zhou Fangxiang, is arranged side by side.According to the present invention,, can make bump leveller densification further on the front end tool long axis direction by above-mentioned formation.Its result, for will move bump leveller and be arranged in the tool body time, the long axis direction of tool body that the situation that the space is restricted is set is very effective.
Another kind of mode according to power tool of the present invention, also have: CD-ROM drive motor, this CD-ROM drive motor is positioned on the long axis of front end tool, and the mode of intersecting with its rotation and this long axis is arranged in the tool body, driving mechanism portion, this driving mechanism portion is contained in the tool body, converts the rotation of CD-ROM drive motor output to rectilinear motion, and the above-mentioned front end tool of linear drives on long axis direction at least; Moving bump leveller is across the long axis and the subtend setting of driving mechanism portion of front end tool.In addition, so-called " subtend setting " among the present invention is to be equivalent to across the front end tool long axis driving mechanism portion is arranged on upside, moving bump leveller is arranged on the mode of downside.In addition, so-called " driving mechanism portion " is a plurality of gears that are equivalent to transmit the rotation of CD-ROM drive motor in general, thereby and converts rotatablely moving of this gear to crank mechanism that rectilinear motion drives front end tool.
CD-ROM drive motor is arranged on the long axis of front end tool, and the long axis of its rotation and front end tool is intersected, in the formation of the upside that driving mechanism portion is arranged on the front end tool long axis, there is remaining space in the lower side of the front end tool long axis on tool body.According to the present invention, utilize this remaining space that moving bump leveller is set, its result can thus, can realize the reasonable configuration structure with should moving bump leveller being provided with in the mode near the long axis of front end tool more.In addition, by driving mechanism portion and moving bump leveller are provided with across front end tool long axis subtend, the gravity balance on the easier above-below direction of obtaining power tool.
According to the another kind of mode of power tool of the present invention, elastic component is made of helical spring, in the inner space of counterweight, and two coaxial interior outsides that are arranged on radially of helical spring that diameter is different.As mentioned above, in the time of outside in an inner space, being arranged on the mutual different helical spring of two diameters radially, compare with a helical spring situation is set, on the basis of the coefficient of elasticity of guaranteeing to stipulate, the length of helical spring long axis direction can be provided with shorter.Its result can realize the densification of the long axis direction (moving direction of counterweight) of moving bump leveller, thereby can reasonably be configured in the space of the setting that limits.
According to the another kind of mode of power tool of the present invention, counterweight has at least three inner spaces, and above-mentioned three inner spaces all are arranged on the same plane.In such structure, the application point of elastic component that is arranged on the inner space is in the same plane, thereby prevents the useless vibration that produces from one's body even force unbalance because of at moving bump leveller effectively.
The effect of invention
According to the present invention, a kind of power tool can be provided, the densification of the moving bump leveller that is used to realize on the power tool and is loaded, and help to improve vibration damping.。
Description of drawings
Fig. 1 is the integrally-built side view cutaway drawing that the electric hammer of expression first embodiment of the invention bores.
Fig. 2 is the vertical view cutaway drawing of the structure of the expression electric hammer major part of boring.
Fig. 3 is the cutaway view of the moving bump leveller of expression.
Fig. 4 is the cutaway view of the moving bump leveller of expression second embodiment of the invention.
Fig. 5 is the cutaway view of the moving bump leveller of expression third embodiment of the invention.
Fig. 6 is the front view of the moving bump leveller of expression four embodiment of the invention.
Fig. 7 is the profile along the A-A line of Fig. 6.
Fig. 8 is the moving bump leveller of expression fifth embodiment of the invention and the front view of its configuration structure.
Fig. 9 is the front view of the moving bump leveller of expression sixth embodiment of the invention.
Figure 10 is the profile along the B-B line of Fig. 9.
Figure 11 is the front view of the moving bump leveller of expression seventh embodiment of the invention.
Figure 12 is the profile along the C-C line of Figure 11.
Figure 13 is the integrally-built side view cutaway drawing of the electric hammer of expression eighth embodiment of the invention.
Figure 14 also is the amplification view of the part of expression electric hammer.
Figure 15 is the profile along the D-D line of Figure 14.
Figure 16 is the profile along the E-E line of Figure 14.
The specific embodiment
First embodiment of the present invention
Below, for first embodiment of the present invention, describe with reference to Fig. 1～Fig. 3.Using the electrodynamic type electric hammer to bore as an example of power tool in the present embodiment describes.Fig. 1 is the integrally-built side view cutaway drawing that the expression electric hammer bores.Fig. 2 is the vertical view cutaway drawing of the structure of the expression electric hammer major part of boring.In addition, Fig. 3 is the cutaway view of the moving bump leveller of expression.
As shown in Figure 1, electric hammer in the present embodiment bores 101, briefly see main main part 103 by the outline that forms electric hammer brill 101, the cutter holder (Tool Holder) 137 that is connected with the front end area (left side shown in the figure) of the long axis direction of this main part 103, be installed in the electric hammer head 119 that can freely load and unload on this cutter holder 137, be connected the handle that the operator gripped 109 on the opposite side (right side shown in the figure) of the long axis direction of main part 103 and constitute.Main part 103 is corresponding to " tool body " of the present invention, and electric hammer head 119 is corresponding to " front end tool " of the present invention.Electric hammer head 119 is kept by cutter holder 137, and the state that keeps is: can carry out relative reciprocating motion at its long axis direction, and be limited in its circumferential relative rotation.In addition, for convenience of explanation, before electric hammer head 119 1 sides are called, after handle 109 1 sides are called.
On the other hand, cutter holder 137 constitutes in the mode that can rotate, and is decelerated rotation by CD-ROM drive motor 111 via Poewr transmission mechanism 117.Poewr transmission mechanism 117 comprises: be driven the idler gear 131 that motor 111 rotation drives, the bevel pinion 133 that rotates with idler gear is nibbled the bevel gear wheel 135 etc. of rotation around the major axis that is incorporated in main part 103 with this bevel pinion 133.The rotation of CD-ROM drive motor 111 is delivered on the cutter holder 137, also transmits to the electric hammer head 119 that remains on this cutter holder 137.In addition, electric hammer brill 101 constitutes in the mode that can suitably switch the operation of electric hammer operation and electric hammer brill, about this point, there is not direct relation with the present invention, so omit its explanation, above-mentioned so-called electric hammer operation is that the impulsive force that only electric hammer head 119 is applied long axis direction is carried out the processing operation of machined material, and it is that the impulsive force on the long axis direction and all revolving forces that makes progress are carried out the processing operation of machined material in the Calais mutually that above-mentioned so-called electric hammer bores operation.
As shown in Figure 2, electric hammer bores 101 in order to reduce the above-mentioned vibration that produces on the main part 103, is provided with moving bump leveller 151.Moving bump leveller 151 is arranged on the left and right sides across the long axis of electric hammer head 119, about the structure of any moving bump leveller 151 itself be identical.Moving bump leveller 151 mainly comprises: cylindrical shell 153, and itself and main part 103 abut to form, and shape is a longer strip on the long axis direction of electric hammer head 119 (fore-and-aft direction), and the cross section is circular; The counterweight 155 of control usefulness, it can be arranged in this cylindrical shell 153 with being free to slide, and longer on glide direction; Helical spring 157, it is configured in the axial front side of electric hammer head length and the rear side of this counterweight 155 respectively.Cylindrical shell 153 is corresponding to " fixation side member " among the present invention.Helical spring 157 is corresponding to " elastic component " among the present invention.Counterweight 155 is when the long axis direction (electric hammer head length direction of principal axis) of cylindrical shell 153 is mobile, and helical spring 157 is to the relative in the other direction ejection force of counterweight 155 effects.In addition, cylindrical shell 153 is set up as the guide portion of the tubular that stably carries out shift action that makes counterweight 155.Though illustrate with main part 103 (gear casing 107) situation when integrally formed in the present embodiment, also can split form cylindrical shell 153, and this cylindrical shell 153 can be installed on the main part 103 with freely loading and unloading.
Be loaded in the moving bump leveller 151 on the main part 103, when electric hammer brill 101 was processed operation, to the main part 103 as the vibration damping object, counterweight 155 and helical spring 157 as damping component in moving bump leveller 151 moved together, carry out passive vibration damping.Thus, can suppress to be created in electric hammer and bore above-mentioned vibration on 101 the main part 103.
In addition, in the ability real mode, moving counterweight 155 front and back of bump leveller 151 in cylindrical shell 153 are provided with first operating chamber 161 and second operating chamber 163.First operating chamber 161 of rear side (right side of Fig. 2), via the first interconnecting part 161a, be communicated with the crank chamber 163 of hermetically-sealed construction, second operating chamber 163 of front side (left side of Fig. 2), be communicated with the cylinder accommodation space 167 of gear casing 107 by the second interconnecting part 163a, above-mentioned hermetically-sealed construction is keeping non-connected state with the outside all the time.Pressure in the crank chamber 165 changes along with the driving of motion changing mechanism 113.This is that the volume of crank chamber 165 changes because of the piston 125 fore-and-aft direction rectilinear motion in cylinder that is accompanied by as the member of formation of motion changing mechanism 133.Variable pressure in this crank chamber 165 is incorporated into first operating chamber 161 from the first interconnecting part 161a, and the counterweight 155 of moving bump leveller 151 by positive driving makes bump leveller 151 performance damping effects.That is, moving bump leveller 151 is except having above-mentioned passive damping effect, and also the pressure by positive driving counterweight adds and shakes, and plays a role as damper mechanism initiatively, thereby is created in vibration on the main part 103 when suppressing the electric hammer operation more effectively.
Show the structure of moving bump leveller 151 among Fig. 3 in further detail.The counterweight 155 of the moving bump leveller 151 of present embodiment constitutes, it is cylindrical to be formed on strip long on the electric hammer head length direction of principal axis, simultaneously, in the both sides of the long axis direction of this counterweight 155, it is circular spring accommodation space 156 that the cross section promptly is set on the regulation zone between front side and the rear side.Spring accommodation space 156 is corresponding to " inner space " of the present invention.Before and after circular spring accommodation space 156 extend to long axis direction (rectangular direction) from the end face of the long axis direction of counterweight 155, simultaneously, near general central portion, stop, and, surrounded by cylindrical portion 155b in the cylindrical portion 155a of the circle in counterweight 155 outsides and inboard circle as the space (groove) of laterally digging through.That is, in the present embodiment, the counterweight 155 with spring accommodation space 156 is structures that cylindrical portion 155a and cylindrical portion 156b become one, and for example uses shaping mould to form.
In the spring accommodation space 156 before and after one distolateral being inserted in of helical spring 157.The direction of insertion end of the helical spring 157 of front and back and bottom surface (terminal) butt of spring accommodation space 156, simultaneously, the end side of the helical spring 157 of front and back and the axial end face butt of cylindrical shell 153 thus, act on the counterweight 155 at the relative active force of the direction of long axis direction.That is, counterweight 155 can move on direction of principal axis under the state that is subjected to from the direction opposite effect power of helical spring 157.In addition, spring accommodation space 156 is bigger than the spring diameter of helical spring 157, and helical spring 157 send ordinatedly and is arranged on wherein thus, and does not contact with the inner face of tubular 155a and the outside of cylindrical portion 15b.Dispose the spring installation portion 155c with the roughly the same internal diameter of internal diameter of helical spring 157 on the cylindrical portion 155b of the bottom side of spring accommodation space 156, the seat end 157a of helical spring 157 is entrenched on this spring installation portion 155c.Thus, the relatively moving and be suppressed radially to counterweight 155 of helical spring 157.
The moving bump leveller 151 of present embodiment as mentioned above, forms spring accommodation space 156 in the inboard of counterweight 155, and in this spring accommodation space 156 helical spring 157 is set.Thus, be equivalent to be provided with the cylindrical portion 155a that has high density weight than this helical spring 157 at the outer circumferential side of helical spring 157.Therefore, be provided with than the low density helical spring structure in the past of this counterweight with outer circumferential side and compare, can increase as the counterweight 155 of damping component and the gross weight of helical spring 157, thereby improve space availability ratio in counterweight.Its result can improve the damping force that moves bump leveller 151.On the other hand, when the gross weight of counterweight 155 and helical spring 157 is identical with in the past gross weight, can be implemented in the densification that the footpath of moving bump leveller 155 makes progress.In addition, be arranged on by cylindrical portion 155a on the periphery of helical spring 157 counterweight 155, can make contact length on the moving direction of wall of cylindrical shell 153 of relative counterweight 155 thus, promptly the axial length at sliding surface is longer, thereby can easily guarantee the operating stably of counterweight 155.
In addition, helical spring 157 is arranged on the spring accommodation space of counterweight 155, thereby can dwindles the external diameter of helical spring 157.When dwindling the diameter of helical spring 157, because the stress that produces diminishes,, strengthen elastic force so can keep the durability of helical spring 157, its result can further improve the damping force of moving bump leveller 157.
In addition, be accompanied by helical spring 157 is arranged on spring accommodation space 156, the external diameter of helical spring 157 diminishes, axial length is elongated, but the helical spring 157 and the butt position of counterweight 155 can be arranged on the position of the inclined to one side central portion of long axis direction, can shorten the axial length of moving bump leveller 151, thereby realize miniaturization.
As mentioned above, according to the embodiment of the present invention, the damping force of moving bump leveller 151 not only can be improved, densification (miniaturization) can also be carried out.
Second embodiment of the present invention
Below, for second embodiment of the present invention, describe with reference to Fig. 4.Second embodiment is and the variation of the structurally associated that moves the counterweight 155 in the bump leveller 151 that except the structure of moving bump leveller 151, other are identical with the first above-mentioned embodiment structure.
As shown in Figure 4, the counterweight 155 of the moving bump leveller 151 of present embodiment mainly is made of tubular weighted 155A that forms the outside cylindraceous and the columniform column weighted 155B that is contained in the inboard in this tubular weighted 155A, and the tubular weighted 155A that is had is different members with column weighted 155B.Tubular weighted 155A is corresponding to " second position " of the present invention, and column weighted 155B is corresponding to " first position " of the present invention.
Tubular weighted 155A becomes roughly the same with the axial length setting of column weighted 155B.Column weighted 155B forms the step-like cylinder of the minor diameter part 155Bb with circular large-diameter portion 155Ba and circle, above-mentioned large-diameter portion 155Ba is formed on axial central portion, and minor diameter part 155Bb is connected on the direction of principal axis both ends of this large-diameter portion 155Ba.And, be pressed into by large-diameter portion 155Ba in the tube hole of tubular weighted 155A column weighted 155B, tubular weighted 155A is become one (connection) with column weighted 155B.Be pressed into and be fixed on the large-diameter portion 155Ba of tube in the hole of tubular weighted 155A, corresponding to " connecting portion " of the present invention.
The minor diameter part 155Bb of column weighted 155B is longer than large-diameter portion 155Ba on direction of principal axis.Thus, at the inner peripheral surface of tubular weighted 155A be contained between the outer peripheral face of minor diameter part 155Bb of the column weighted 155B in this tubular counterweight 155A, having formed cross section longer than large-diameter portion 155Ba on direction of principal axis is circular front and back spring accommodation space 156, and helical spring 157 is inserted into and is arranged in this spring accommodation space 156.In addition, on the connecting portion of large-diameter portion 155Ba and minor diameter part 155Bb, form the spring installation portion 155Bc identical or smaller with the internal diameter of helical spring 157.Seat end 157a in direction of insertion is entrenched under the state of spring installation portion 155Bc, the helical spring 157 of front and back and the direction of principal axis end face butt of the large-diameter portion 155Ba of the bottom surface that is equivalent to spring accommodation space 156, the direction of principal axis end face butt of the other end and cylindrical shell 153.Thus, the force direction that is produced by the helical spring 157 of front and back relatively acts on the counterweight 155.
Moving bump leveller 151 according to present embodiment, identical with above-mentioned first embodiment, can carry out miniaturization when improving damping force, constitute counterweight 155 by two members in addition, can process individually tubular weighted 155A and column weighted 155B by tubular weighted 155A and column weighted 155B.Therefore, the processing operation becomes easy.Particularly,, the tubular weighted 155A in the outside can be become the rectilinear cylindrical shape, therefore, can enhance productivity owing to be the structure that column weighted 155B is pressed into weighted 155A.
In addition, with in tubular weighted 155A and the structure that column weighted 155B forms as different members, tubular weighted 155A can use different materials to form with column weighted 155B.Therefore, for the tubular weighted 155A that is positioned at the outside, just along the inwall slip this point of cylindrical shell 153, can use sliding (low frictional properties) or the contour material of wearability to form, on the other hand, for being arranged on inboard column weighted 155B, its main order is to guarantee as the weight that vibration damping is used, and can use proportion to form than the higher material of tubular weighted 155A.
The 3rd embodiment of the present invention
Below, for the 3rd embodiment of the present invention, describe with reference to Fig. 5.Present embodiment is the variation of above-mentioned second embodiment, in moving bump leveller 151, tubular weighted 155A and the column weighted 155B that is arranged in the tubular weighted 155A as the member that constitutes counterweight 155, relatively act on the active force of helical spring 157 of the front and back of above-mentioned tubular weighted 155A and column weighted 155B by direction, become one.The weighted 155A of tubular is corresponding to " second position " of the present invention, and column weighted 155B is corresponding to " first position " of the present invention.
In the present embodiment, the direction of principal axis in the inner face of the tube hole of tubular weighted 155A roughly disposes flange part 155Aa on the centre position, and this flange part 155Aa is as the block member of determining that inside radially-protruding position is used.Column weighted 155B has large-diameter portion 155Ba, with one be connected large-diameter portion 155Ba the direction of principal axis both sides than this large-diameter portion 155Ba longer minor diameter part 155Bb on direction of principal axis, and loose fit ground chimeric (insertions) is in the hole of tubular weighted 155A.Thereby the direction of insertion end face of the large-diameter portion 155Ba of the column weighted 155B that this is inserted into and flange part 155Aa butt are determined its position, thus, between the tube hole inner peripheral surface of the weighted 155A of the outer peripheral face of minor diameter part 155Bb and tubular, be formed on cross section longer on the direction of principal axis and be the spring accommodation space 156 of circular front and back than large-diameter portion 155Ba.
In the spring space 156 of front and back, insert helical spring 157 respectively.In addition, on the connecting portion of large-diameter portion 155Ba and minor diameter part 155Bb, be formed with the spring installation portion 155Bc identical or slightly little with the internal diameter of helical spring 157.The direction of insertion of (left side of Fig. 5) helical spring 157 of front side the seat end 157a with the chimeric state of spring installation portion 155Bc, with the direction of principal axis end face butt of flange part 155Aa, the axial end face butt of the other end and cylindrical shell 153.The direction of insertion of the helical spring 157 of rear side (right side of Fig. 5) the seat end 157a with the chimeric state of spring installation portion 155Bc, with the direction of principal axis end face butt of the large-diameter portion 155Ba that is equivalent to spring accommodation space 156 bottom surfaces, the axial end face butt of the other end and cylindrical shell 153.Thus, the force direction of the helical spring 157 of front and back relatively acts on tubular weighted 155A and column weighted 155B.And the pushing of the relative active force of the direction of helical spring 157 compresses large-diameter portion 155Ba and flange part 155Aa mutually before and after being subjected to, and tubular weighted 155A and column weighted 155B become one thus.Large-diameter portion 155Bb and flange part 155Aa are corresponding to " connecting portion " of the present invention.
The moving bump leveller 151 of present embodiment constitutes as described above.Therefore, can reach following effect: identical with the first above-mentioned embodiment, in the damping force that improves moving bump leveller 151, can carry out densification, identical with the second above-mentioned embodiment, tubular weighted 155A and column weighted 155B can be processed individually, can realize forming tubular weighted 155A and column weighted 155B with different materials.
Particularly,, be used to the relative active force of direction, tubular weighted 155A and column weighted 155B are become one from the helical spring 157 of front and back according to present embodiment.Promptly, tubular weighted 155A and column weighted 155B utilize flange part 155Aa and large-diameter portion 155Ba to block mutually and state under, the direction opposite effect power of the helical spring 157 before and after utilizing, keep the engagement state on composition surface, above-mentioned flange part 155Aa and large-diameter portion 155Ba are as the card and the face that intersect with long axis direction (moving direction).Therefore, do not need to use to be pressed into fixture, only need carry out assembling operation and just can simply tubular weighted 155A be constituted (connection) one with column weighted 155B.
The 4th embodiment of the present invention
Below, for the 4th embodiment of the present invention, describe with reference to Fig. 6 and Fig. 7.Present embodiment be with move bump leveller 151 in the relevant variation of configuration of spring accommodation space 156 of counterweight 155, except the structure of moving bump leveller 151, other formations with above-mentioned first embodiment are identical.
In the moving bump leveller 151 of present embodiment, as Figure 6 and Figure 7, counterweight 155 forms the bulk of the essentially rectangular of growing on fore-and-aft direction and above-below direction, and on this counterweight 155, be formed with side by side on above-below direction that fore-and-aft direction (long axis direction of electric hammer head 119) in counterweight 155 extends and the cross section is the spring accommodation space 156 of circular front and back each two (adding up to four).The opening that (is the right side in the diagram) in the axial rear end of counterweight 155 and the rear side spring accommodation space 156 that forwards extends are configured in the top and the bottom of counterweight 155, and the spring accommodation space 156 in axial front end (left side in the diagram) opening of counterweight 155 and the front side of rearward extending is configured in the pars intermedia of the above-below direction of counterweight 155.And, ccontaining each helical spring 157 in each spring accommodation space 156 of front and back.The spring accommodation space 156 of front side is corresponding to " first inner space " of the present invention, and the spring accommodation space 156 of rear side is corresponding to " second inner space " of the present invention.
As mentioned above, be formed in the present embodiment in the counterweight 155, be used for the helical spring accommodation space 156 of the front and back of ccontaining helical spring 157, the direction (above-below direction) from the direction of principal axis with counterweight 155 intersects is provided with in overlapped mode.Thus, the length of the fore-and-aft direction of counterweight 155, promptly the contraction in length of long axis direction is littler than the respective embodiments described above, can be further implemented in the densification on the long axis direction that moves bump leveller 151 thus.Its result, for will move bump leveller 151 and be arranged on the main part 103 time, the situation of the limited space system that is provided with of the long axis direction of main part 103 is effective especially.In addition, the spring accommodation space 156 of front side is arranged on the centre position of above-below direction, and the spring accommodation space 156 of rear side is arranged on upper and lower sides, so that the spring accommodation space 156 of rear side clips the spring accommodation space 156 of above-mentioned front side, thereby the active force that can set the helical spring 157 that makes the front and back that act on counterweight 155 is in the mutual balance of the moving direction of counterweight 155.Thus, the useless vibration (even power) produce because of moving of counterweight 155 can be suppressed, thereby the stable action of counterweight 155 can be made.
The 5th embodiment of the present invention
Below, for the 5th embodiment of the present invention, describe with reference to Fig. 8.Present embodiment is the variation of above-mentioned the 4th embodiment.Promptly, as shown in Figure 8, in the present embodiment, on counterweight 155, the direction of intersecting from long axis direction with this counterweight 155, overlap the to each other the spring accommodation space 156 before and after being provided with, and based on so moving bump leveller 151, to move the profile of the counterweight 155 of bump leveller 151 again, form the corresponding semicircle arcuation of external surface shape (curved surface) (seeing roughly semicircular) with cylinder 141 cylindraceous (or cylindrical portion of ccontaining cylinder 141) from electric hammer head 119 sides, and along the outer surface of this cylinder 141 and be provided with.In addition, form this point in circular cross section about the spring accommodation space 156 of front and back, identical with each above-mentioned embodiment.The spring accommodation space 156 of front side is corresponding to " first inner space " of the present invention, and the spring accommodation space 156 of rear side is corresponding to " second inner space " of the present invention.
According to the present embodiment that constitutes as mentioned above, in the densification of the long axis direction of further having realized moving bump leveller 151, it is shorter that the length of the above-below direction of bump leveller 151 is compared with the situation of the 4th embodiment, thereby make bump leveller 151 densification more.In addition, be provided with along the outer surface of cylinder 141 (or cylinder of ccontaining cylinder 141), be not easy to produce idle space (dead space), thereby help the densification of main part 103 in the peripheral region of this moving bump leveller 151 by moving bump leveller 151.In addition, to move under the situation that the outer surface of bump leveller 151 along cylinder 141 (or cylindrical portion of ccontaining cylinder 141) be provided with, in Fig. 8 for convenience, the state that has only shown a side that is arranged on cylinder, but the generation for the useless vibration (even power) that suppresses to be caused by the action of moving bump leveller 151 preferably is arranged on the left and right sides as shown in Figure 2.
The 6th embodiment of the present invention
Below, for the 6th embodiment of the present invention, describe with reference to Fig. 9 and Figure 10.Present embodiment is the variation of above-mentioned the 4th embodiment.In the present embodiment, as Fig. 9 and shown in Figure 10, on counterweight 155, the direction of intersecting from long axis direction with this counterweight 155, overlap the to each other the spring accommodation space 156 before and after being provided with, and based on so moving bump leveller 151, the coefficient of elasticity of the helical spring 157 in the coefficient of elasticity that makes the helical spring 157 in the spring accommodation space 156 that is arranged on the front side again and the spring accommodation space 156 that is arranged on rear side is different, reduces the use number of helical spring 157 thus.The spring accommodation space 156 of front side is corresponding to " first inner space " of the present invention, and the spring accommodation space 156 of rear side is corresponding to " second inner space " of the present invention.
In the present embodiment, in forming roughly block counterweight 155, on above-below direction, forming spring accommodation space 156 of rear side and two spring accommodation spaces 156 of front side abreast.In addition, form this point in circular cross section about the spring accommodation space 156 of front and back, identical with each above-mentioned embodiment.The spring accommodation space 156 of rear side is arranged on the centre position of the above-below direction of counterweight 155, two spring accommodation spaces 156 of front side are arranged on the upper and lower of counterweight 155, and clip the spring accommodation space 156 of rear side, in each spring accommodation space 156, dispose helical spring 157.And the coefficient of elasticity of the helical spring 157 of rear side is set at bigger than the coefficient of elasticity of the helical spring 157 of front side.That is, the coefficient of elasticity of front and back helical spring 157 is set at the mutual balance of active force of a helical spring 157 of the active force of two helical springs 157 that make the front side that acts on the helical spring 155 and rear side.In addition, the coefficient of elasticity with two helical springs 157 of front side is set at identical.
According to aforesaid present embodiment, in the state of the mutual balance of active force of a helical spring 157 of the active force of two helical springs 157 keeping the front side and rear side, can reduce the quantity of the helical spring 157 of a side (being rear side in the present embodiment).Thus, in the densification of the long axis direction of realizing moving bump leveller 151, the length of the above-below direction of counterweight 155 is compared shorter with the situation of the 4th embodiment, thereby further realizes the densification of moving bump leveller 151.
In addition, in above-mentioned the 4th to the 6th embodiment, for above-below direction is illustrated, this configuration (loading) direction of moving bump leveller 151 that is based on main part 103 is for supposing longitudinally to make to the overlapping direction (orientation) of spring accommodation space.Therefore, if will move bump leveller 155 situation that (loading) becomes horizontal (level) is set, the overlapping direction of spring accommodation space 156 just becomes left and right directions.
The 7th embodiment of the present invention
Below, for the 7th embodiment of the present invention, describe with reference to Figure 11 and Figure 12.Present embodiment constitutes, to move bump leveller 151 is provided with in the mode of the periphery that covers (encirclement) cylinder 141 (or cylindrical portion of ccontaining cylinder 141), simultaneously, the spring accommodation space 156 of front and back is arranged on the counterweight 155 of this moving bump leveller 151, and from week that the long axis direction with this counterweight 155 intersects always, be set up in overlapped mode.
That is, as Figure 11 and shown in Figure 12, from electric hammer head 119 sides (the place ahead), counterweight 155 roughly forms ring-type.And, on counterweight 155, on the direction of principal axis of counterweight 155, overlap the to each other the spring accommodation space 156 of formation arranged side by side front side and rear side, ccontaining helical spring 157 separately in each spring accommodation space 156.In addition, form this point in circular cross section about the spring accommodation space 156 of front and back, identical with each above-mentioned embodiment.In addition, the situation of the spring accommodation space 156 that four front and back are set respectively has been shown in the ability real mode, but has been not limited only to this, can suitably increase and decrease.The spring accommodation space 156 of front side is corresponding to " first inner space " of the present invention, and the spring accommodation space 156 of rear side is corresponding to " second inner space " of the present invention.
According to present embodiment, will move bump leveller 151 and (loading) will be set, thereby realize being difficult to the rational setting of generation idle space in the neighboring area of this moving bump leveller 151 in the periphery that covers cylinder 141 (or cylindrical portion of ccontaining cylinder 141).And, counterweight 155 is formed roughly ring-type, the spring accommodation space 156 of front and back is overlapped the to each other be arranged on week upwards, shorten the axial length of counterweight 155 thus, thereby can realize the densification of the direction of principal axis length of moving bump leveller 151.
The 8th embodiment of the present invention
Below, for the 8th embodiment of the present invention, describe with reference to Figure 13 to Figure 16.Present embodiment is suitable for the electric hammer 201 as large-scale power tool,, CD-ROM drive motor 211 is arranged on form than bent axle 221 more close handle 209 sides that is.Figure 13 is the integrally-built cutaway view of expression electric hammer 201, and Figure 14 represents the wherein amplification view of a part.As Figure 13 and shown in Figure 14, form the main part 203 main motor shells 205 of the exterior contour of electric hammer 201 by ccontaining CD-ROM drive motor 211, the gear casing 207 of ccontaining movement conversion mechanism 213, the cylindrical portion 208 of ccontaining impact structure 215 constitutes.Gear casing 207 is bonded on the front side upper area of motor shell 205.Cylindrical portion 208 is bonded on the leading section of gear casing 207, and forwards extends on the long axis of electric hammer head 219.In addition, when handle 209 was arranged on the rear of motor shell 205, the upper end engaged with the rearward end of gear casing 207, and the bottom engages with the rear end of motor shell 205.
CD-ROM drive motor 211 is located on the long axis of electric hammer 219, and its rotation and this long axis intersect, that is, CD-ROM drive motor 211 is set to above-below direction.In the upper area of the inner space of gear casing 207, ccontaining movement conversion mechanism 213, this movement conversion mechanism 213 pass to impact structure after converting the rotation output of CD-ROM drive motor 211 to rectilinear motion again.
In addition, impact structure 215 is identical with the first above-mentioned embodiment, mainly by constituting as the ram 243 of impulse member with as the impact bolt 245 of middleware, this ram 243 can be arranged on the hole inwall of cylinder 141 with being free to slide, this impact bolt 245 can be arranged on the cutter holder 237 with being free to slide, and the kinetic energy of ram 243 is delivered in the electric hammer head 219.In cylinder 241, between piston 225 and ram 243, form air chamber 241a.The air spring of the air chamber 241a of the cylinder 241 that attends by the sliding action of piston 225 mutually and produce, drive ram 243, and bump (impact) is arranged on the impact bolt 245 as middleware on the cutter holder 237 with being free to slide, via this impact bolt 245 impulsive force is delivered on the electric hammer head 219.
As mentioned above, for on the long axis of electric hammer head 219, disposing the so large-scale electric hammer 203 of CD-ROM drive motor 211, in the structure of the upper side that driving mechanism portion is arranged on gear casing 207, there is remaining space at the lower area of this gear casing 207 (lower surface area that intersects with the front surface of motor shell 205), above-mentioned driving mechanism is used for by converting rotatablely moving of CD-ROM drive motor 211 to rectilinear motion, and drives electric hammer head 219.In this embodiment, utilize above-mentioned remaining space to be provided with moving bump leveller 251.
In addition, when hope is provided with moving bump leveller 251 with the state of the long axis of as close as possible electric hammer head 219, but the width of the fore-and-aft direction of above-mentioned remaining space (long axis direction of electric hammer head 219) is narrow, and forwardly the part above-below direction on have difference in height, thereby be restricted.Therefore, in this embodiment, the length densification of the fore-and-aft direction by will moving bump leveller 251 can be arranged in the above-mentioned remaining space moving bump leveller 251.Below, the structure of moving bump leveller 251 is described.
As Figure 15 and shown in Figure 16, the counterweight 255 of the moving bump leveller 251 of this embodiment forms in the horizontal direction (fore-and-aft direction and left and right directions) and goes up long roughly bulk, and the fore-and-aft directions that are contained in slidably in the cylindrical shell 253 are the long axis direction of electric hammer head 219.The left and right sides internal face that reaches up and down of cylindrical shell 253 forms and the corresponding shape of the profile of counterweight 255, and counterweight 255 can be free to slide under state of contact with inner wall surface thereof.Cylindrical shell 253, integrally formed in the bottom of gear casing 207, constitute by the 253a of case portion of open lower side and the 253b of cover portion that can be bonded on the 253a of this case portion in the mode that covers opening with freely loading and unloading.
Be formed with spring accommodation space 256 of rear side and two spring accommodation spaces 256 of front side on the left and right directions in counterweight 255 side by side.Each spring accommodation space 256 of front and back has formed circular cross section by outside weighted 255A and column counterweight 255B, above-mentioned outside weighted 255A has the tube hole that end shape is arranged of cross section circle, and above-mentioned column counterweight 255B is littler than the tube bore dia of coaxial setting in this hole.Column weighted 255B has flange part 255Ba in a side of long axis direction, and in the tube hole that this flange part 255Ba is pressed into outside weighted 255A, the weighted 255A with the outside links thus.The spring accommodation space 256 of rear side is from open rearward end and extension forwards.Two spring accommodation spaces 256 of front side are from front opening and extension rearward.And the spring accommodation space 256 of rear side is formed on the centre position of the left and right directions of counterweight 255, and two spring accommodation spaces 256 of front side are formed on the left side and right side of counterweight 256, thereby clip the spring accommodation space 256 of rear side.
In the spring accommodation space 256 of front side, dispose each helical spring 257, in the spring accommodation space 256 of rear side, in radially interior outside arranged coaxial than helical spring 257 diameters of front side big and diameter two different helical spring 257a mutually, 257b.In addition, the spring filament diameter of the outer helical spring 257a that surveys is littler than the spring filament diameter of inboard helical spring 257b.And, set the helical spring 257a of two of the coefficient of elasticity of two helical springs 257 in front side and rear sides respectively, the coefficient of elasticity of 257b is so that act on the helical spring 257a of two of the active force of two helical springs 257 in front side on the counterweight 255 and rear sides, the mutual balance of the active force of 257b.In addition, helical spring 257,257a, 257b, with compressive state be arranged on spring and accept between the flange part 255Ba of parts 258 and cylindrical component 255B, this spring is accepted parts 258 and is arranged in the cylindrical shell 253.And, the major axis center line that aforesaid moving bump leveller 251 is configured to the spring accommodation space 256 of rear side be positioned at electric hammer head 219 long axis under the position.
Moving bump leveller 251 according to the present embodiment that constitutes as mentioned above, will be in the spring accommodation space 256 of rear side than helical spring 257 diameters of front side bigger and diameter is different mutually two helical spring 257a and 257b be arranged on the interior outside on the coaxial direction, compare with a helical spring situation is set, the helical spring 257a of rear side and the spring length of 257b can be set shortlyer.Therefore, in the mobile space of the fore-and-aft direction that can guarantee counterweight 255, can shorten the length (long axis direction of electric hammer head 219) of the fore-and-aft direction of moving bump leveller 251.Thus, can, moving bump leveller 251 is arranged on the state near the long axis of electric hammer head 219 in the confined remaining space of width of fore-and-aft direction in the lower area of above-mentioned gear casing 207.
Particularly, under the situation of present embodiment, because and the position relation between the cylinder 241, it is narrow step-like that the last direction of front region that the remaining space of moving bump leveller 251 can be set is.Therefore, because two helical spring 257a and 257b are set in rear side spring accommodation space 256, can form the thin-walled of above-below direction in the front part of the counterweight 255 of the spring accommodation space 256 that does not have rear side, can reasonably be arranged in the step-like remaining space moving bump leveller 251 thus.Promptly, be set up with following state, as Figure 14 and shown in Figure 15, under the long axis of electric hammer head 219, the zone, front side of the central upper portion of left and right directions is embedded into the downside of cylinder 241 in the moving bump leveller 251, posterior region is inserted into than the bottom of this cylinder 241 and more on the top position near the long axis of electric hammer head 219, has realized effectively utilizing the configuration of remaining space thus.
In addition, according to the moving bump leveller 251 of present embodiment, three spring accommodation spaces 256 that are formed in the counterweight 255 are arranged on the same plane.Therefore, the application point that is arranged on helical spring 257 in the spring accommodation space 256,257a, 257b on same plane, thereby can prevent the useless vibration that the even force unbalance because of moving bump leveller 251 self produces.
In addition, by moving in the lower area that bump leveller 251 is arranged on gear casing 207, this moving bump leveller 251 is across the long axis and the movement conversion mechanism 213 subtend settings of electric hammer head 219.Thus, obtain the gravity balance of electric hammer 201 on above-below direction easily.
In addition, as Figure 13 and shown in Figure 14, moving bump leveller 251 is identical with the first above-mentioned embodiment, and the rear side of the counterweight 255 in cylindrical shell 253 has first operating chamber 261, has second operating chamber 263 in the front side of counterweight 255.And, first operating chamber 261 of rear side is communicated with crank chamber 265 via the first interconnecting part 261a, this crank chamber 265 has the hermetically-sealed construction that keeps non-connected state all the time with the outside, and the second action part 263 of front side is communicated with the cylinder accommodation space 267 of gear casing 207 via the second interconnecting part 263a.Therefore, moving bump leveller 251 is identical with the situation of first embodiment, except above-mentioned passive damping effect, can also add by the pressure of positive driving counterweight and shake, play a role as initiatively damper mechanism, thus the vibration that on main part 103, produces when suppressing the electric hammer operation more effectively.
In addition, in the above-described embodiment, as power tool with electric hammer bore 101 and electric hammer 201 be that example is illustrated, but so long as carry out power tool, can both be suitable for the processing operation of machined material by making front end tool carry out rectilinear motion.For example, also can be applicable to by making the saw cutter carry out straight line and come and go action and carry out the scroll saw of the cut-out operation of machined material or reciprocating saw etc.
In addition, in the moving bump leveller 151 of the 4th to the 7th embodiment, counterweight 155 is identical with the situation of second embodiment, tubular weighted 155A is made of different members with column weighted 155B, and can use pressing structure or, they be become one by active force structure from the helical spring 157 of both sides.In addition, for the situation in circular cross section is illustrated, but also can be hollow shape beyond hollow round-shaped or circular to spring accommodation space 156.
In addition, in view of purport of the present invention, can constitute in such a way.
(mode 1)
The power tool of the invention described above is characterized in that, by above-mentioned first position being pressed into the inboard at above-mentioned second position, this first position and this second position is become one.
According to the present invention of aforesaid way 1, make first position and second position constitute one by being pressed into mode, second position can be formed the simple shape of straight line, processing is become be more prone to.
(mode 2)
The power tool of the invention described above, it is characterized in that, above-mentioned first position is inserted in the inboard at above-mentioned second position in the mode of loose fit, above-mentioned second position and above-mentioned first position, composition surface by the direction of intersecting with the direction of insertion at this first position is bonded with each other, simultaneously, and under this engagement state, by the effect of the relative active force of the direction that is produced by a plurality of elastic components, above-mentioned second position and above-mentioned first position become one.
According to the present invention of aforesaid way 2, utilize the active force of a plurality of elastic components that direction relatively acts on, first position and second position constitute one, therefore can not need fixture.
Claims (7)
1. power tool, it is by the linear drives front end tool, and the processing operation that this front end tool is put rules into practice is characterized in that, has tool body and moving bump leveller;
Wherein, above-mentioned moving bump leveller has: counterweight, and it is installed on the above-mentioned tool body or is installed on the main body side member that is fixedly arranged at above-mentioned tool body, and can carry out rectilinear motion on above-mentioned front end tool long axis direction; Elastic component, it is supported on above-mentioned counterweight on above-mentioned tool body or the aforementioned body side member with compressive state,
Above-mentioned moving bump leveller is by above-mentioned counterweight rectilinear motion on above-mentioned front end tool long axis direction, and the above-mentioned tool body during to the processing operation carries out vibration damping,
Above-mentioned counterweight has and begins the inner space of extending to this long axis direction from the end of at least one side of the long axis direction of front end tool,
Distolateral be inserted in above-mentioned inner space in of above-mentioned elastic component on the long axis direction of above-mentioned front end tool, another distolateral being arranged on above-mentioned tool body or the aforementioned body side member.
2. power tool as claimed in claim 1 is characterized in that,
Above-mentioned counterweight has: to first position that above-mentioned front end tool long axis direction extends; Cover second position on every side of the bearing of trend at above-mentioned first position; At least a portion on the bearing of trend at above-mentioned second position is connected to the connecting portion at above-mentioned first position;
The space that is surrounded by above-mentioned first position, above-mentioned second position and above-mentioned connecting portion has constituted above-mentioned inner space,
In addition, above-mentioned first position is made of different members with above-mentioned second position.
3. power tool as claimed in claim 2 is characterized in that,
Above-mentioned first position is formed by different materials with above-mentioned second position.
4. as each described power tool in the claim 1～3, it is characterized in that,
Above-mentioned counterweight has: from a distolateral beginning of above-mentioned front end tool long axis direction first inner space to another distolateral extension; To second inner space of a distolateral extension, from the direction of intersecting with bearing of trend, above-mentioned first inner space and above-mentioned second inner space overlap each other from another distolateral beginning of above-mentioned front end tool long axis direction.
5. as each described power tool in the claim 1～4, it is characterized in that also having:
CD-ROM drive motor, this CD-ROM drive motor is positioned on the long axis of above-mentioned front end tool, and is arranged in the above-mentioned tool body in the mode that its rotation and this long axis intersect,
Driving mechanism portion, this driving mechanism portion is contained in the above-mentioned tool body, converts the rotation of above-mentioned CD-ROM drive motor output to rectilinear motion, and the above-mentioned front end tool of linear drives on long axis direction at least;
Above-mentioned moving bump leveller is provided with across the long axis of above-mentioned front end tool and above-mentioned driving mechanism portion subtend.
6. as each described power tool in the claim 1～5, it is characterized in that,
Above-mentioned elastic component is made of helical spring, in the inner space of above-mentioned counterweight, and two coaxial interior outsides that are arranged on radially of helical spring that diameter is different.
7. as each described power tool in the claim 1～6, it is characterized in that,
Above-mentioned counterweight has at least three inner spaces, and above-mentioned three inner spaces all are arranged on the same plane.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007191683 | 2007-07-24 | ||
| JP2007191683 | 2007-07-24 | ||
| JP2007-191683 | 2007-07-24 | ||
| JP2008040725 | 2008-02-21 | ||
| JP2008-040725 | 2008-02-21 | ||
| JP2008040725A JP5147449B2 (en) | 2007-07-24 | 2008-02-21 | Work tools |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101352849A true CN101352849A (en) | 2009-01-28 |
| CN101352849B CN101352849B (en) | 2012-05-02 |
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ID=40305995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101095677A Active CN101352849B (en) | 2007-07-24 | 2008-06-02 | Working tool |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5147449B2 (en) |
| CN (1) | CN101352849B (en) |
| RU (1) | RU2477213C2 (en) |
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| CN102343577A (en) * | 2010-08-03 | 2012-02-08 | 株式会社牧田 | Power tool |
| CN102387899A (en) * | 2009-04-10 | 2012-03-21 | 株式会社牧田 | Striking tool |
| CN102655990A (en) * | 2009-12-16 | 2012-09-05 | 罗伯特·博世有限公司 | Hand-power tool with an oscillation-damping device |
| CN102806551A (en) * | 2011-06-01 | 2012-12-05 | 株式会社牧田 | Reciprocating movement type power tool |
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| JP5345893B2 (en) * | 2009-05-08 | 2013-11-20 | 株式会社マキタ | Impact tool |
| DE102009054723A1 (en) * | 2009-12-16 | 2011-06-22 | Robert Bosch GmbH, 70469 | Hand tool |
| DE102015205149A1 (en) * | 2015-03-23 | 2016-09-29 | Robert Bosch Gmbh | Hand tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102387899A (en) * | 2009-04-10 | 2012-03-21 | 株式会社牧田 | Striking tool |
| CN102387899B (en) * | 2009-04-10 | 2015-06-24 | 株式会社牧田 | Striking tool |
| CN102655990A (en) * | 2009-12-16 | 2012-09-05 | 罗伯特·博世有限公司 | Hand-power tool with an oscillation-damping device |
| CN102655990B (en) * | 2009-12-16 | 2016-08-03 | 罗伯特·博世有限公司 | There is the hand held power machine of vibration dampeners |
| US10071468B2 (en) | 2009-12-16 | 2018-09-11 | Robert Bosch Gmbh | Hand-power tool with an oscillation-damping device |
| CN102343577A (en) * | 2010-08-03 | 2012-02-08 | 株式会社牧田 | Power tool |
| CN102343577B (en) * | 2010-08-03 | 2014-12-17 | 株式会社牧田 | Power tool |
| CN102806551A (en) * | 2011-06-01 | 2012-12-05 | 株式会社牧田 | Reciprocating movement type power tool |
Also Published As
| Publication number | Publication date |
|---|---|
| RU2477213C2 (en) | 2013-03-10 |
| RU2008130527A (en) | 2010-01-27 |
| JP5147449B2 (en) | 2013-02-20 |
| JP2009045732A (en) | 2009-03-05 |
| CN101352849B (en) | 2012-05-02 |
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