CN101612729B - Power tool - Google Patents

Abstract

A hand-held power tool comprises a power tool body having a tip end region to which the tool bit is coupled, and a handle provided on the rear of the power tool body opposite to the tool bit, the handle being held by a user of the power tool, wherein the handle is connected to the power tool body via an elastic element and can slide with respect to the power tool body in an axial direction of the tool bit and an extending region provided with the power tool body, the extending region extending to a lower region of the handle to receive the sliding movement of the handle.

Description

Hand-held working tool

Technical field

The present invention relates to drive the vibrationproof handle of the hand-held working tool of front end tool like hammer or percussion drill etc., in some cycles.

Background technology

The formation of the hand electric hammer that possesses the vibrationproof handle is disclosed in the TOHKEMY 2005-219195 communique.In this electrically operated hammer, disclose the elastomer that vibrationproof handle that the operator is gripped when the jarring operation uses by absorption of vibrations and hammered the formation that body is installed relatively into shape.Particularly, the vibrationproof handle is hammered the rear portion of body relatively into shape, and long axis direction one end (lower end) side of its hand grip portion is that fulcrum can relatively rotate along the long axis direction (fore-and-aft direction) of drill bit with the turning cylinder, and the other end (upper end) side connects via elastomer.

Be supported in the relatively turnable above-mentioned rotary type vibrationproof handle through turning cylinder, it is circular-arc that elastomer with the turning cylinder is that the axle center is deformed into.Therefore, when the vibration-isolating effect that elastomeric deformation direction is intended near the long axis direction of drill bit obtain to expect, the configuration space between turning cylinder and elastomer can increase, and the result makes the vibrationproof handle excessive on above-below direction.Thus, the vibrationproof handle of oscillatory type is difficult to be applicable to and with regard to this point, still has the leeway of improvement in the smaller power tool.

Summary of the invention

The present invention forms in view of the above problems, and it is a kind of to hand-held working tool that purpose is to provide, and can make the compact technology of vibrationproof handle.

In order to realize above-mentioned problem; The optimal way of hand-held working tool involved in the present invention is a kind of hand-held working tool; Make front end tool linearly shape drive along long axis direction; The operations that this front end tool is put rules into practice is characterized in that, have front end area the power tool body of front end tool is installed removably and be configured in the front end tool on the power tool body opposition side the rearward end side be made for the handle that the dealer grips.As " hand-held working tool " of the present invention; Be typically and make front end tool carry out percussion action and carry out hammer work piece jarring operation along long axis direction; But be not limited to hammer; And come work piece is carried out the percussion drill of percussion drill operation except making front end tool carry out percussion action and spinning movement, also comprise the cutting operation instruments such as reciprocating-type saw or bent saw that for example make blade carry out linear reciprocating motion and work piece carried out cutting operation.

According to the preferred mode of the hand-held working tool that the present invention relates to, handle links via elastomer and power tool body, and handle can slide on the long axis direction of front end tool with respect to this power tool body relatively.Power tool body in addition has that lower zone to handle extends and the elongated area of bearing the sliding action of this handle.In addition, " elastomer " of the present invention is typically spring or rubber.In addition; Bear the mode of the sliding action of handle as the elongated area; For example for interplanar carries out the mode of sliding action each other relatively with state of contact, preferably comprise hole and the sliding structure of chimeric with it bar-like member etc. of the long axis direction of sliding structure or front end tool between the protuberance of groove and engaging with it of long axis direction of front end tool.

In the present invention, constitute the relative power tool body of handle with long axis direction elasticity binding relatively slidably along front end tool.Therefore elastomer can absorb the vibration that occurs along the distortion of long axis direction straight line of front end tool, therefore can improve the absorption efficiency of this elastomer to vibration.In addition,, therefore can as existing rotary type handle, not receive the restriction of the setting of above-below direction length shape, can realize densification owing to be the formation that the relative power tool body of handle linearly relatively moves.In addition, in the present invention, on the power tool body, be provided with, bear the sliding action of handle by this elongated area to the elongated area of the lower zone extension of handle.Can constitute the mode of carrying-handle stably thus.

According to the another mode of hand-held working tool involved in the present invention, handle forms the frame structure of closed hoop by following three parts, is respectively: the upwardly extending hand grip portion of upper and lower that intersects at the long axis direction with front end tool; Each one the arm up and down that extends to long axis direction equidirectional respectively from the bearing of trend end of this hand grip portion with front end tool; The cross part that the extended end of last lower arm part is bonded with each other.According to the present invention, the structure of the framework through forming this closed hoop can improve the rigidity of handle, and is impaired when preventing to drop effectively.

According to the another mode of hand-held working tool involved in the present invention,, be set with the sliding surface that relative power tool body can be free to slide in the lateral side regions parallel handle with long axis direction front end tool." lateral side regions of handle " of the present invention is meant the lateral side regions of arm or the lateral side regions of cross part.According to the present invention, through on the lateral side regions of handle, possessing the sliding surface that slides with the power tool body, can reduce the direction of intersecting, being becoming flexible on the left and right directions with this rear end face.Thus, can make handle stable, even and reduce elastomeric elastic constant and still can obtain sufficient vibration-isolating effect to relatively moving of power tool body.

According to the another mode of hand-held working tool involved in the present invention, sliding surface has second sliding area of the above-below direction extension that the bearing of trend of first sliding area that extends along the long axis direction of front end tool and edge and this first sliding area intersects.First sliding area is set in the side of arm, and second sliding area is set in the side of cross part.According to the present invention; Second sliding area of first sliding area of the long axis direction through setting front end tool and the above-below direction that intersects with the long axis direction of front end tool; Bigger sliding surface can be formed, handle becoming flexible can be further reduced for the power tool body.

Another mode according to hand-held working tool involved in the present invention; Have electro-motor that drives front end tool and the storage source that is used as the power supply of this electro-motor, the above-mentioned elongated area of extending to the lower zone of handle constitutes the storage source installation portion that can supply storage source to install removably freely.Thus, according to the present invention, in the rechargeable hand-held working tool that uses as the power supply of electro-motor with storage source, can be with the slide-and-guide zone that is also used as handle from the extended zone of power tool body and the installed base of battery, more reasonable.

Another mode according to hand-held working tool involved in the present invention; Power tool body and handle; Upper end and bottom at this handle link together via guide part; This guide part allows the relative sliding action along long axis direction of front end tool, and restriction relatively moving to this long axis direction direction in addition.According to the present invention, not only at the left and right directions of handle, also suppressed becoming flexible on the above-below direction, can make to become flexible further and reduce.

Another mode according to hand-held working tool involved in the present invention; Guide part is made up of the protuberance that the groove that extends along the long axis direction of front end tool and this groove relatively engage; This protuberance is made up of metallic pin, and groove is formed by the material that material is different from the metal cotter.For groove and protuberance, can make one of them be set in the power tool base side certainly, another is set in handle side.And, at least for the material of setting the slot part side, from the lighting equal angles preferably with synthetic resin system or aluminium alloy system.According to the present invention, with regard to the protuberance and slot part that carry out sliding action relatively, constitute with the material of unlike material through making them, can improve sliding capability.

According to the present invention,, the technology that makes the vibrationproof handle compact can be provided to hand-held working tool.

Description of drawings

Fig. 1 is the outside drawing that the integral body of the related rechargeable percussion drill of expression embodiment of the present invention constitutes.

Fig. 2 is an in-built side view of representing rechargeable percussion drill with dotted line and part section.

Fig. 3 is the figure of vibration absorbing structure of expression lever, the original state (installment state) that the expression lever moves to rear.

Fig. 4 is the figure of the vibration absorbing structure of expression lever, and the expression lever is to forefront (case side) mobile maximum mobile status.

Fig. 5 is the A-A line cutaway view of Fig. 3.

Fig. 6 is the B-B line cutaway view of Fig. 3.

Fig. 7 is the overall diagram of percussion drill.

Among Fig. 8 (A) be output shaft part explanation he, (B) be A to view, be that B is to view (C).

Fig. 9 is the enlarged drawing of output shaft part.

Figure 10 is the key diagram of state behind the preceding side body of dismounting.

Figure 11 is the key diagram of state behind the dismounting right shell body.

(A) is C-C line cutaway view among Figure 12, (B) is D-D line cutaway view.

Figure 13 is the transverse sectional view of the rear end part of inner casing.

Symbol description is following:

101... percussion drill (hand-held working tool); 103... body (power tool body); 105... housing; 105a... top extension; 105b... below extension (elongated area); 105c... pars intermedia; 105L... the housing component parts is half-and-half cut apart on a left side; 105R... the housing component parts is half-and-half cut apart on the right side; 107... storage source; 109... lever (handle); 109a... trigger; 109b... electric switch; 109L... the lever component parts is half-and-half cut apart on a left side; 109R... the lever component parts is half-and-half cut apart on the right side; 111... electro-motor; 113... motion changing mechanism; 115... impact structure; 117... transmission mechanism; 119... drill bit (front end tool); 121... driven wheel; 123... driven gear; 125... jackshaft; 127... rotary body; 129... pendular ring; 131... first travelling gear; 133... second travelling gear; 137... drill bushing; 141... trunk-piston; 143... jarring part; 145... impact bolt; 151... key pin; 153... pin-and-hole; 155... screw; 161... hand grip portion; 162... upper arm parts; 162a... even surface; 163... lower arm part; 163a... even surface; Support portion 164... (cross part); 164a... even surface (sliding surface); 165... opening edge; 167... key pin; 168... pin-and-hole; 169... screw; 171... upside slide-and-guide portion (guide part); 171a... slotted hole; 171b... protuberance; 173... downside slide-and-guide portion (guide part); 173a... groove; 173b... metallic pin; 175... middle slide-and-guide portion; 175a... groove; 175b... circular projection; 181... last cylindrical spring (elastomer); 183... following cylindrical spring (elastomer); 185... inner casing.

The specific embodiment

Below, with reference to Fig. 1～Fig. 6 embodiment of the present invention is elaborated.In the embodiment of the present invention, describe with the example of rechargeable percussion drill as hand-held working tool.Fig. 1 is the outside drawing that the integral body of the related percussion drill 101 of this embodiment of expression constitutes.Fig. 2 reaches the in-built side view that part section is represented percussion drill 101 by a dotted line.As shown in Figure 1, roughly have on percussion drill 101 main bodys: form the exterior contour of percussion drill 101 body 103, by drill bushing 137 detachables be installed in the front end area of this body 103 drill bit 119, be connected in the lever that is available for users to grip 109 and the storage source 107 that is installed on the lower side of body 103 of opposition side of the drill bit 119 of body 103.Body 103 corresponding to " power tool body " of the present invention, drill bit 119 corresponding to " front end tool " of the present invention, lever 109 corresponding to " handle " of the present invention.Drill bit 119 is remained and can move back and forth relatively and along the confined state that relatively rotates on its all direction along its long axis direction by drill bushing 137.Explanation for ease later on is after drill bit 119 sides are called preceding, lever 109 sides and are called.

As shown in Figure 2, body 103 constitutes housing 105 as main body, wherein contains electro-motor 111, motion changing mechanism 113, impact structure 115 and transmission mechanism 117.The rotation output of electro-motor 111 passes to impact structure 115 after motion changing mechanism 113 suits to be transformed into linearly operating, via the impulsive force of 115 pairs of drill bits of this impact structure, 119 generations along long axis direction (left and right directions of Fig. 2).And the rotation of electro-motor 111 output makes this drill bit 119 along the circumferential direction do spinning movement suitably being delivered to drill bit 119 after the deceleration by transmission mechanism 117.The energising of electro-motor 111 drives and can make electric switch 109b become conducting state and carry out through the trigger 109a that is configured on the lever 109 is colluded operation.

Electro-motor 111 is configured in the lower area in the housing 105, and the long axis direction of its rotation and drill bit 119 intersects and on above-below direction, is skewed extension.Motion changing mechanism 113 comprises as the formation of main body: by the driven wheel 121 of electro-motor 111 rotation drivings; Mesh the driven gear 123 that engages and in vertical guide, be driven in rotation with this driven wheel 121; Through the rotary body 127 of jackshaft 125 with these driven gear 123 rotations; The pendular ring of on the long axis direction of drill bit 119, swinging through the rotation of rotary body 127 129 as tilting member; And through the swing of pendular ring 129 the trunk-piston 141 that moves back and forth of shape linearly as actuator.Rotary body 127 and by bearing relatively the pendular ring 129 of free rotary ground supporting on rotary body 127 constitute swing mechanisms.

Trunk-piston 141 forms cylindric that an end (rear end) is plugged.Trunk-piston 141 is configured in the drill bushing 137 with the tubular of these trunk-piston 141 arranged coaxial slidably, and is driven by the wobbling action (the long axis direction component of drill bit 119) of pendular ring 129, does linearly operating along this drill bushing 137.

Impact structure 115 main bodys constitute and to comprise: be configured in slidably in the tube hole of trunk-piston 141 as the jarring part 143 of impulse member, be configured in the impact bolt 145 that passes to drill bit 119 in the drill bushing 137 and with the kinetic energy of jarring part 143 slidably as middleware.Air chamber through trunk-piston 141 is along with the pressure oscillation (air spring) that the sliding action of this trunk-piston 141 produces drives (shaking) jarring part 143; Make it bump (impact) to the impact bolt 145 that is configured in slidably in the drill bushing 137, impact bolt 145 via this and transmit impulsive force to drill bit 119.Trunk-piston 141, jarring part 143 and impact bolt 145 have constituted beater mechanism.

Transmission mechanism 117 main bodys constitute and to comprise: first travelling gear 131 that from electro-motor 111, is driven in rotation in vertical guide via jackshaft 125 and engage with these first travelling gear, 131 engagements and with second travelling gear 133 of arranged coaxial in the outside of drill bushing 137.The rotary driving force of second travelling gear 133 passes to drill bushing 137, and further transmits the drill bit 119 in remaining on this drill bushing 137.

In the percussion drill 101 that as above constitutes; After electro-motor 111 is energized driving; On drill bushing 119, can be applied with from the impulsive force along long axis direction of motion changing mechanism 113, and be applied with the revolving force of along the circumferential direction going up via transmission mechanism 117 via impact structure 115.So, drill bit 119 carries out jarring action and the action of the boring on the circumferencial direction on the long axis direction, realizes the perforate operation to work piece (concrete).

In addition; Percussion drill 101 can constitute to be implemented in drill bit 119 is only applied along the impulsive force of long axis direction and work piece is carried out the jarring operation of operations and apply between the percussion drill operation of carrying out operations along the impulsive force of long axis direction and revolving force along the circumferential direction and to work piece suiting to switch; But because the present invention does not have direct relation therewith, explain it the Therefore, omited.

Below, mainly the vibration absorbing structure of lever 109 is described with reference to Fig. 3～Fig. 6.Fig. 3 and Fig. 4 are the figure of the vibration absorbing structure of expression lever 109, and Fig. 5 is the A-A line cutaway view of Fig. 3, and Fig. 6 is the B-B line cutaway view of Fig. 3.Like Fig. 5 and shown in Figure 6, constitute the housing 105 of the hollow structure of body 103, along the long axis direction of drill bit 119 by slit shearing and by about housing component parts 105L, the 105R half-and-half cut apart constitute.In Fig. 3 and Fig. 4, the state of half housing component parts 105L in the left side of removal when in the past looking percussion drill 101 sideways is shown.About the housing component parts 105L of half-and-half cutting apart, parts, half housing component parts 105L among the 105R like the left side on; As shown in Figure 5; The peripheral edge margin of interface side (inner face side) be wholely set a plurality of on the direction vertical with this interface the key pin 151 of outstanding tubulars, half housing component parts 105R on right side is provided with the corresponding pin-and-hole 153 of a plurality of and this key pin 151.And be embedded under the state in the pin-and-hole 153 at key pin 151, through screw 155 with about housing component parts 105R, the 105L half-and-half cut apart be bonded with each other together.

Like Fig. 3 and shown in Figure 4, lever 109 constitutes loop-like one frame structure by following part, that is: the hand grip portion 161 that extends of the above-below direction (vertical) that intersects of the long axis direction of edge and drill bit 119; The last lower arm part 162,163 of extending to the left and right directions (horizontal direction) that intersects with this bearing of trend from the bearing of trend end of this hand grip portion 161; And the interconnective support portion 164, extended end that roughly extends in parallel and will go up lower arm part 162,163 with hand grip portion 161.Improved the rigidity of lever 109 thus.Therefore, the lever when preventing that percussion drill 101 from dropping 109 is comparatively effective aspect impaired.Support portion 164 is corresponding to " cross part " of the present invention.

In addition, like Fig. 5 and shown in Figure 6, lever 109 is identical with the situation of housing 105, is made up of lever component parts 109L, the 109R half-and-half cut apart along the long axis direction slit shearing of drill bit 119.About the lever component parts 109L of half-and-half cutting apart, parts among the 109R, half-and-half cutting apart on the lever component parts 109L like the left side; Be wholely set the key pin 167 of a plurality of tubulars vertical with this interface in the peripheral edge margin of interface side (inner face side), correspondingly the lever component parts 109R of half-and-half cutting apart on right side is provided with the corresponding pin-and-hole 168 of a plurality of and this key pin 167.And be embedded under the state in the pin-and-hole 168 at key pin 167, through screw 169 with about lever component parts 109R, the 109L half-and-half cut apart be bonded with each other together.

As shown in Figure 1, the rear area of housing 105 through to the upper arm parts 162 extended top extension 105a of lever 109, to lower arm part 163 extended below extension 105b and the pars intermedia 105c between being positioned at wherein form and overlook the approximate コ shape that is.Be formed with opening respectively on the back surface of the upper surface of the lower surface of extension 105a and rear end face, below extension 105b and pars intermedia 105c up; Be inserted in the hollow of top extension 105a, below extension 105b and pars intermedia 105c through the last lower arm part 162,163 and the support portion 164 of this opening, and can move along the long axis direction of drill bit 119 with lever 109.Below extension 105b correspondence " elongated area " of the present invention.In addition, side below the extension 105b below housing 105 is equipped with above-mentioned storage source 107 detachable.Promptly below extension 105b is used for the installed base of storage source 107.

So; For relatively moving at the long axis direction (fore-and-aft direction) of drill bit 119, and its front is attached to housing 105 via cylindrical spring up and down 181,183 the part except that hand grip portion 161 on the lever 109 with the state support that sandwiched (bag advances) from the left and right sides by the rear area of the approximate コ shape of housing 105.Like Fig. 3 and shown in Figure 4; Top cylindrical spring 181 is the pretension shape to be located at the front end face of upper arm parts 152 and to be configured between the rear portion wall of the inner casing 185 in the housing 105, and the cylindrical spring 183 of bottom is the pretension shape and is located between the rear portion wall of front lower and inner casing 185 of support portion 164.

The left and right side of lower arm part 162,163 and the left and right side of support portion 164 on the lever 109 form even surface 162a, 163a, the 164a parallel with the long axis direction of drill bit 119 on the some or all parts of one of which.The even surface 162a of last lower arm part 162,163,163a extend along the long axis direction (fore-and-aft direction) of drill bit 119, and extend with the above-below direction that the long axis direction of drill bit 119 intersects on the even surface 164a edge of support portion 164.In addition, with respect to this even surface 162a, 163a, 164a, the top extension 105a of housing 105, below extension 105b, and pars intermedia 105c go up the opening edge (wall) 165 (with reference to Fig. 5) of the opening that forms can be relatively slidably butt with it.

That is, opening edge 165 forms relative even surface 162a, 163a, the 164a slide-and-guide face with the mode sliding-contact of face contact.In addition; Be the diagram of the structure of the butt between the opening edge of scheming simple and clear even surface 163a, 164a and below extension 105b and the pars intermedia 105c that omits lower arm part 163 and support portion 164, constitute and construct identical with the butt of 165 of the opening edges of the even surface 162a of upper arm parts 162 shown in Figure 5 and top extension 105a.Thus, can suppress lever 109 with respect to housing 105 becoming flexible on the horizontal direction (left and right directions) that the long axis direction with drill bit 119 intersects, the result can realize stablizing about the relative sliding action on the long axis direction of drill bit 119.Even surface 162a, 163a, 164a are corresponding to " sliding surface " of the present invention; The even surface 162a of top extension 105 and below extension 105b, 163a are corresponding to " first sliding area " of the present invention, and the even surface 164a of support portion 164 is corresponding to " second sliding area " of the present invention.

In addition, above the upper arm parts 162 of lever 109 and the housing 105 between the extension 105a, lower arm part 163 and below between the extension 105b and between support portion 164 and the pars intermedia 105c, set slide-and-guide portion 171,173,175 respectively.Slide-and-guide portion 171,173 up and down is corresponding to " guide part " of the present invention.Like Fig. 3～shown in Figure 5, the formation of last slide-and-guide portion 171 comprises the slotted hole 171a at the substantial middle place on the bearing of trend that is formed on upper arm parts 162, is formed on top extension 105a side and inserts slidably and lead to the protuberance 171b in this slotted hole 171a.In addition; Protuberance 171b is constituted as by tubular key pin 151 dual-purposes on the above-mentioned housing component parts 105L of half-and-half cutting apart that is formed on the left side; In this embodiment, with two key pins 151 with the mode that is also used as protuberance 171b along being set up in parallel on the long axis direction of drill bit 119.Slotted hole 171a connects (with reference to Fig. 5) on left and right directions, and on the long axis direction of drill bit 119, extends (with reference to Fig. 3 and Fig. 4) with specific length.

In addition; Like Fig. 3, Fig. 4 and shown in Figure 6, the formation of the slide-and-guide portion 173 of bottom comprises: be installed in the rear end side (and hand grip portion 161 connecting portion) of lower arm part 162 two metallic pin 173b as protuberance, be formed on the rear end side top inner face (about the inner face of half-and-half cutting apart housing component parts 105L, 105R) of below extension 105b and can supply the groove 173a that the end of metallic pin 173b inserts slidably (among Fig. 3 and Fig. 4 by shown in the double dot dash line).Two metallic pin 173b connect lower arm part 163 along left and right directions, and are set up in parallel on the long axis direction (front and back) of drill bit 119 with predetermined distance, connect end (direction of principal axis end) and are inserted among the groove 173a.Groove 173a extends with specific length on the long axis direction of drill bit 119.In addition, the housing component parts 105L of half-and-half cutting apart, 105R that forms groove 173a forms with light materials such as the material that is different from metallic pin 173b, for example synthetic resin, aluminium.Therefore adopt different materials and, can improve sliding at the structure that slides to each other.

In addition; Like Fig. 3 and shown in Figure 4, middle slide-and-guide portion 175 constitutes and comprises: be formed on support portion 164 the forward, lower part side side and the groove 175a that on the long axis direction of drill bit 119, extends with specific length and inwardly outstandingly be arranged on the pars intermedia 105c inner face of housing 105 and be fitted to the circular projection 175b (with reference to illustrated double dot dash line) among this groove 175a slidably.

As stated; Lever 109 receives the restriction of the slide-and-guide portion 171,173,175 that sets in three places in the middle of reaching up and down with respect to the relatively moving of above-below direction that the long axis direction with drill bit 119 of housing 105 intersects, and has suppressed loosening on this above-below direction.

The percussion drill 101 as the above-mentioned formation of this embodiment.Fig. 3 representes original state (state that lever 109 relative housings 105 are installed); Under this state; To the rear effect away from the direction of housing 105, the protuberance 171b of the slide-and-guide portion 171 of upside abuts to the anterior end of slotted hole 171a to the pretightning force of utilizing cylindrical spring 181,183 at least with lever 109.Fig. 4 representes that lever 109 moves to from original state and relies on housing 105 sides (the place ahead) most that protuberance 171b is resisted against the state (maximum mobile status) of the rear end of slotted hole 171a.The maximum rate of travel of representing lever 109 with symbol L.

The operator holds the hand grip portion 161 of lever 109, and impact is bored 101 and applied the operations that forward pressing force utilizes percussion drill 101.That is, protuberance 171b, metallic pin 173b and the circular projection 175b of the slide-and-guide portion 171,173,175 in the middle of reach up and down place respectively under rear end and the state between the anterior end of slotted hole 171a, groove 173a and 175a and carry out operations.Under this state, allow lever 109 relatively moving with respect to the long axis direction along drill bit 119 (fore-and-aft direction) of housing 105.Therefore, when operations, cylindrical spring 181,183 capable of using reduces the vibration that results from the housing 105 from the transmission of this housing 105 to lever 109.

In this embodiment, as stated, constitute lever 109 via up and down cylindrical spring 181,183 and the binding of housing 105 elasticity, and be mounted to and relatively move along the long axis direction of drill bit 119.Therefore therefore the distortion absorbed oscillation of cylindrical spring 181,183 straight line along long axis direction capable of using has improved the absorption efficiency of 181,183 pairs of vibrations of cylindrical spring.

Hammer relatively at hand grip portion that body distolaterally links via cylindrical spring with one of bearing of trend (above-below direction), another is distolateral is under the situation of existing rotary type lever of fulcrum and rotating support with the turning cylinder; When vibration-isolating effect that the deformation direction of cylindrical spring is intended near the long axis direction of drill bit to obtain to expect; Configuration space between turning cylinder and cylindrical spring can increase, and the result makes the size of above-below direction of lever become big.Yet, of this embodiment, when constitute make lever 109 linearly shape relatively move when realizing vibrationproof along the long axis direction of drill bit 119, the setting of above-below direction length can not be restricted, and can realize the densification of lever 109.

In addition; According to this embodiment; Except that the below extension 105b that is arranged on housing 105 capable of using stably the lower arm part 163 of sliding bearing lever 109, below extension 105b also can be also used as the installed base of storage source 107, therefore can form rational supporting form.

In addition; According to this embodiment; Be utilized in the last lower extension 105a, 105b and the pars intermedia 105c between this two extension 105a, 105b that the rear portion of housing 105 rearward extend and set out to overlook and be approximate コ shape zone, and with the last lower arm part 162,163 of lever 109 and support portion 164 insert (enterings) regional to being similar to コ shape.Thus, can form bigger even surface 162a, 163a, 164a in the side about this arm 162,163 and support portion 164, can suppress lever 109 becoming flexible on left and right directions.In addition, the slide-and-guide portion 171,173,175 in the middle of reaching up and down capable of using suppresses above-below direction loosening of levers 109.

As stated; According to this embodiment, for lever 109, through becoming flexible of the direction beyond the long axis direction that suppresses drill bit 119; The spring constant that reduces cylindrical spring 181,183 can be provided and sufficient vibration-isolating effect can be obtained, and the lever 109 of the good vibration absorbing structure of usability.

In addition; In this embodiment; The situation of boring for the example impact with the hand-held working tool is illustrated; But also can be applied to drill bit 119 is only carried out along in the hammer of the percussion action of long axis direction, perhaps be applied to and make blade carry out linear reciprocating motion and work piece is carried out in the cutting operation instruments such as reciprocating-type saw or bent saw of cutting operation.

In addition, in this embodiment,, also can be applicable to by AC power supplies and drive in the power tool of electro-motor 111 though describe as the rechargeable power tool of the power supply of electro-motor 111 to possess storage source 107.

The mode that can be constructed as follows in addition,

(mode 1-1)

A kind of electric tool; In housing, contain motor with being positioned at that this motor the place ahead receives the driving of said motor the efferent of doing action; The housing of cutting apart that above-mentioned housing is divided into by pair of right and left constitutes and accommodates the body housing of the rear part from said motor to above-mentioned efferent and accommodate the preceding side body of the place ahead part of above-mentioned efferent, wherein

In above-mentioned body housing; Setting is accommodated the rear part of above-mentioned efferent and more outstanding and cut apart the inner casing that housing grips by above-mentioned than above-mentioned body housing; Side body before above-mentioned is assemblied in the front of above-mentioned body housing with the state that overlaps with the protuberance of above-mentioned inner casing, makes and above-mentionedly cut apart housing and preceding side body can be distinguished independent dismounting.

(mode 1-2)

In the electric tool of putting down in writing in (mode 1-1); The above-mentioned housing of cutting apart is fixed with screw in the outstanding position of being located at mutual inner surface and under assembled state, being the tubular protuberance of the shape that is coaxial docking each other; Being arranged on the position that is assembled in the above-mentioned body housing on this external above-mentioned inner casing can be by the locating hole of above-mentioned boss perforation; Screw fixing above-mentioned cut apart housing in, can position fixing to above-mentioned inner casing.

(mode 1-3)

In the electric tool of putting down in writing in (mode 1-1 or 1-2); With said motor with its output shaft up and the lower end of the above-mentioned output shaft inclination attitude that more relies on the place ahead than the upper end be housed in the downside of above-mentioned inner casing, and the upper end of above-mentioned output shaft is inserted into the helical gear engagement of the input that makes it and be arranged on above-mentioned efferent in the above-mentioned inner casing.

In the invention of putting down in writing among the aforesaid way 1-1; It is more outstanding and cut apart housing and help fixing inner casing through the rear part accommodate efferent is set in the body housing than body housing; In addition preceding side body is assemblied in the front of body housing with the state that overlaps with the protuberance of inner casing, makes and cut apart housing and preceding side body can be distinguished independent dismounting.

The invention of putting down in writing among the mode 1-2 is on the formation base of mode 1-1; For inner casing is assembled in the body housing with reasonable and higher precision; Fix with screw in the outstanding position of being located at mutual inner surface and under assembled state, being the tubular protuberance of the shape that is coaxial docking each other and will cut apart housing; Being arranged on the position that is assembled in the body housing on this external inner casing can when screw is fixedly cut apart housing, can be positioned fixing to inner casing by the locating hole of boss perforation.

The invention of putting down in writing among the mode 1-3; On the basis of mode 1-1 or mode 1-2; In order to carry out effectively from the rotation transmission of motor to efferent; And with motor with output shaft up and the lower end of the output shaft inclination attitude that more relies on the place ahead than the upper end be housed in the downside of inner casing, and the upper end of output shaft is inserted into the helical gear engagement of the input that makes it and be arranged on efferent in the inner casing.

According to the invention of putting down in writing among the mode 1-1; Guaranteed the rigidity of the partitioning portion of body housing and preceding side body; And to a certain side place under repair in body casing side and the front side case side time, also can deal with, improve the operation property of repairing etc. through the removal corresponding shell.

According to the invention of putting down in writing among the mode 1-2, can inner casing be assembled in the body housing with reasonable and higher precision.Make that thus the position relation of motor and efferent is stable, bring influence can for the rotation transmission.

According to the invention of putting down in writing among the mode 1-3, can carry out effectively from the rotation transmission of motor to efferent.

In addition, in the present invention, can constitute in the following manner.

(mode 2-1)

A kind of location structure of rotating shaft; Be the structure that the relative housing of rotating shaft is located on direction of principal axis, the outer bearing that can remain in housing that is equipped with in this rotating shaft, and the front of this bearing be pressed into can supply and above-mentioned housing between the sleeve of the seal member sliding-contact that is provided with; Wherein

Make the end of sleeve and a side end face butt of above-mentioned bearing, the bearing baffle of the opposite side end face butt of setting and above-mentioned bearing utilizes above-mentioned sleeve and the above-mentioned bearing of bearing baffle clamping on this external housing, and above-mentioned rotating shaft is located on direction of principal axis.

(mode 2-2)

In the location structure of the rotating shaft of putting down in writing among the mode 2-2, above-mentioned bearing baffle is formed the semicircle shape with the roughly half cycle part butt of above-mentioned bearing.

(mode 2-3)

The location structure of the rotating shaft of putting down in writing among mode 2-1 or the 2-2, wherein, the bearing baffle setting be arranged on bearing baffle being navigated to the fastening pawl on the installation site of above-mentioned housing of above-mentioned inner casing by the fastening of fastening portion.

The invention of putting down in writing among the mode 2-1, with the end of sleeve and a side end face butt of bearing, the bearing baffle of the opposite side end face butt of setting and bearing on this external housing utilizes sleeve and bearing baffle to help bearing, and rotating shaft is located on direction of principal axis with sealing.

The invention of putting down in writing among the mode 2-2 on the formation base of mode 2-1, for the Min. with necessity constitutes bearing baffle, forms the semicircle shape with the roughly half cycle part butt of bearing with bearing baffle.

The invention of putting down in writing among the mode 2-3; On the formation base of mode 2-1 or 2-2; In order to carry out the assembling of bearing baffle more simply, the bearing baffle setting be arranged on bearing baffle being navigated to the fastening pawl on the installation site of housing of inner casing by the fastening of fastening portion.

According to the invention of mode 2-1, can countershaft positions through utilizing existing sleeve to come accurately with simple formation.Can keep thus and the correct engagement between side gear afterwards, obtain favorable durability.

According to the invention of mode 2-2, also can make bearing baffle solve the need of the location of countershaft with minimal formation, when having suppressed the increase of cost, can also easily carry out assembling to inner casing.

According to the invention of mode 2-3, also utilize the fastening pawl to carry out assembling more simply to inner casing.

Below, based on accompanying drawing the concrete embodiment that relates in the aforesaid way is described.

Fig. 7 is that percussion drill 1 (left side of Fig. 7) downside in the wings is equipped with battery 2, contains motor 3 in its place ahead as the overall diagram of percussion drill of an example of electric tool, and the output shaft 4 of motor 3 rushes to, and above motor 3, efferent 5 is set.Efferent 5 at first has by the jackshaft 6 along the supporting of fore-and-aft direction axle; Front and back at this jackshaft 6; Respectively with jackshaft 6 splits and rotatably outer first gear 7 and oblique bearing 8 (swash bearing) that be equipped with; And between first gear 7 and oblique bearing 8, be provided with clutch sleeve 9, it can and can axially slide with the rotation of jackshaft 6 one.In addition, above jackshaft 6, outer integratedly be equipped with the drill bushing 10 of the tubular of second gear 11 of first gear, 7 engagements be supported to parallel with jackshaft 6, in drill bushing 10, in be provided with jarring part 13 piston cylinder 12 can advance and retreat and insert wherein loosely movably.The arm 14 of the rear end of this piston cylinder 12 and oblique bearing 8 links, and impacts the place ahead that bolt 15 can be housed in piston cylinder 12 movably forward and backward.

Like this; When clutch sleeve 9 forwards being slided only engage with first gear 7; The rotation meeting of jackshaft 6 passes to first gear 7 via clutch sleeve 9; And passing to drill bushing 10 via second gear 11, the not shown drill bit that is assemblied in the front end of drill bushing 10 is thus just done rotation (drill mode) with drill bushing 10.In addition; When only engaging with oblique bearing 8 when clutch sleeve 9 is rearward slided, the rotation of jackshaft 6 passes to oblique gear 8 via clutch sleeve 9, and arm 14 swings make piston cylinder 12 advance and retreat move; Jarring part 13 moves impact bolt 15 and drill hammer (jarring pattern) thereupon.In addition, when both engaged with clutch sleeve 9 and first gear 7 and oblique bearing 8, then first gear 7 and oblique bearing 8 both rotations were while drill bit rotates by impact (percussion drill pattern).

In addition, the housing of percussion drill 1 is divided into body housing 20 and preceding side body 21, and body housing 20 covers from the rear part of efferent 5 whole to the rear of containing motor 3, and preceding side body 21 covers the place ahead part of efferent 5 in the place ahead of this body housing 20.In addition, the rear part of efferent 5 is housed in the inner casing 22 that is encased in the body housing 20.

At first; Shown in Figure 10 and Figure 12 (A); Body housing 20 is by constituting as a pair of left and right sides housing 23,24 of cutting apart housing; At outstanding protuberance 25, the 25... that is provided with tubular of the inner surface of left shell 23 with screwed hole, be provided with protuberance 26, the 26... of tubular in addition with through hole at the inner surface of right shell body 24, it is embedded in each protuberance 25 and is the state that is coaxial docking with it outside right shell body is under the state that left shell 23 is installed.Thus, run through protuberance 26 and screw into the protuberance 25 from left shell 23 sides, can assemble body housing 20 through making screw 27.In addition, upside links at the rear of body housing 20 has handle portion 28, wherein contains the switch 16 of CD-ROM drive motor 3, and possesses the trigger switch 17 that can make switch 16 connections when colluding.

In addition; Inner casing 22 is box-shaped bodies of front openings and rear sealing; Rear end by the ball bearing that is arranged on rear inner part 29 supporting jackshafts 6; Insert the output shaft 4 of motor 3 in addition from following insertion mouth 30, the outer ball bearing 31 that is loaded on output shaft 4 is engaged with inserting mouth 30, support output shaft 4 thus.The motor 3 here is to be housed in the body housing 20 with the lower end of output shaft 4 inclination attitude more forward than the upper end; From insert mouthfuls 30 be inserted into the output shaft 4 of inner casing 22 front end be fixed in jackshaft 6 the rear end and with bevel gear 18 engagements of the input that is positioned at efferent 5, rotation from output shafts 4 to jackshaft 6 that can transmit.

Here, as shown in Figure 8, be pressed into sleeve 32 in the front of the ball bearing 31 of output shaft 4, this sleeve 32 can supply to remain on oil sealing 33 sliding-contacts as seal member of inserting in mouthfuls 30, realizes the sealing in the inner casing 22.The 34th, in the front of sleeve 32 and the back-up ring of fastening on output shaft 4.In addition, when the opening of the insertion mouth 30 of output shaft 4, form necking part 35, this necking part 35 outside, locating ring 36 is housed, itself and the outside end face butt of the ball bearing of adorning outward 31.

In addition; Opening portion at the insertion mouth 30 of inner casing 22 is provided with bearing baffle 37; This bearing baffle 37 is the semicircle shape with the roughly half cycle part butt of the outside end face of ball bearing 31; Hold-down nut 39 respectively on the installation portion 38,38 of the outstanding ring-type up and down of being located at outer circumferential side, and be L word shape in 38,38 formation of two installation portions and turn back to the fastening pawl 40,40 of the opposition side of nut 39.

In addition, inner casing 22 be formed with pair of screws fixed part 41,41 up and down, it has the thickness that can supply 40,40 fastenings of fastening pawl, and in the outstanding separately projection 42 that is provided with of mutual opposite end.

Like this; When with fastening pawl 40,40 fastenings of bearing baffle 37 during in screw fixed part 41,41; Fastening pawl 40,40 and projection 42,42 butts; Limited bearing baffle 37 moving along the vertical direction, the center of installation portion 38 and nut 39 is positioned on the not shown through hole consistent location with screw fixed part 41.Under this state; If hold-down screw 43 is run through screw fixed part 41 with installation portion 38 and precession nut 39; Then bearing baffle 37 can be fixed with the state with the outside end face butt that inserts mouthfuls 30 opening and ball bearing 31, prevents that ball bearing 31 from coming off when inserting the opening of mouth 30.Thus, be loaded on front and sleeve 32 butts of the ball bearing 31 of output shaft 4 outside making,, thereby make output shaft 4 location, non-loosening ground on direction of principal axis from opposition side and bearing baffle 37 butts from output shaft 4.

In addition, two places up and down in the rear end of inner casing 22 form the tube portion 44 of locating hole 45 that the position that has during being assembled into body housing 20 can supply protuberance 25 perforations of left shell 23.Under the state that this locating hole 45 connects, shown in Figure 12 (A), the end face of tube portion 44 founds fin 46 butts of establishing with inner face at left shell 23 along the periphery of protuberance 25 at protuberance 25.Thus when the state that inner casing 22 is assembled into left shell 23 down during assembling right shell body 24, the protuberance 26 of right shell body 24 is positioned at tube portion 44 with the end face butt of tube portion 44 centre of left and right directions.That is, in fixing to body housing 20 screws, can be through protuberance 25,26 with inner casing 22 positioning and fixing.

In addition, the front end of inner casing 22 is more outstanding than the front opening of body housing 20, outside the groove 48 of the Zhou Fangxiang of the outer surface that is formed at this protuberance 47, O type ring 49 is housed.

On the other hand; Before side body 21 have the open rearward end with the front opening of body housing 20 coupling; Be covering and assign to a thin cylindrical body of the front end of drill bushing 10 and jackshaft 6, the bearing 50 of 10 supportings of pair cutting ferrule and the ball bearing 51 of the front end of supporting jackshaft 6 are arranged in set inside from the front part of inner casing 22.For the assembling of this preceding side body 21 and body housing 20, shown in Figure 12 (B), the through hole 52 of screw 53 rear end of side body 21 before be formed on is connected, and precession is formed in the screwed hole 54 of front end of left and right sides housing 23,24.Under this assembled state, the prominent bar 55 of the outer surface of the outstanding protuberance 47 that is arranged on inner casing 22 is by body housing 20 and preceding side body 21 clampings, the inner surface butt of O type ring 49 and preceding side body 21.

Symbol 56 is contained in the LED of the forward, lower part of body housing 20 below motor 3, the posture face forward on being tiltedly, the place ahead of the solid drill bit at drill bushing 10 of irradiation dress.Especially here, the inclination attitude of the lower shape Yin Mada 3 of body housing 20 and be prominent gradually forwards skewed in below, LED is preferably placed at the roughly jag of this skewed part, therefore can be effectively from the job position of irradiation foremost of body housing 20.

In addition, the rear end of inner casing 22 is at the rear of piston cylinder 12, and is shown in figure 13, on fore-and-aft direction, is equipped with steam vent 57, be formed with in the back of inner casing 22 be communicated with steam vent 57 and axis and steam vent 57 vertical and to the right opening end tube portion 58 arranged.Be filled with the filter 59 of felt system in the bottom side of this one 58, at the open side assembly strainer cover 60 that has formed steam vent 61 on the axle center in airtight side arranged in addition, it is the bottom tube-like that has to filter 59 side openings, thereby prevents that filter 59 from coming off.In addition, at the inner surface of right shell body 24, the outstanding projection 62 of assembled state lower front end near the steam vent 61 of strainer cover 60 that be provided with realizes preventing coming off of strainer cover 60.

So, rise when the heat that generates along with the start of efferent 5 makes the temperature in the inner casing 22, when expanding appearred in inner air, air can be discharged from the steam vent 61 of strainer cover 60 via tube portion 58 from steam vent 57.At this moment; Though the lubricating oil (grease) in the inner casing 22 also can be filtered device 59 and absorb along with air enters into a portion 58 from steam vent 57 together, even and if lubricating oil from filter 59, overflow; Also can be filtered device lid 60 and stop, so can not escape in the body housing 20 from steam vent 61.

Especially here, with steam vent 61 rush at right shell body 24 sides towards being set at vertical with the steam vent of fore-and-aft direction 57, therefore in assembling right shell body 24, avoided coming off of strainer cover 60 by projection 62, rational in infrastructure.

In the percussion drill 1 that as above constitutes; Under the state of the inner casing 22 that fixedly contains motor 3 and efferent 5 on the left shell that handle 28 is being installed 23; The covering right housing 24 and with screw fixedly time the from the top; When the assembling of body housing 20 can be realized as described above, realize the positioning and fixing of inner casing 22 in body housing 20.In addition; The assembling of 4 pairs of inner casings 22 of output shaft; Be after assembling locating ring 36, ball bearing 31, sleeve 32, back-up ring 34 respectively; Insertion is assembled with in the insertion mouth 30 of oil sealing 33, and the front end of ball bearing 31 is engaged with being formed at the fitting portion 30a with ball bearing 31 is complementary that inserts mouth 30, utilizes hold-down screw 43 rigid bearing baffle plates 37 at last.

Afterwards, be assembled into the front of body housing 20 and fixedly the time, promptly accomplished the assembling of percussion drill shown in Figure 71 with the mode of side body 21 before the place ahead of efferent 5 covers with screw.Under this state, except that body housing 20, preceding side body 21 is also integrated with the protuberance 47 of inner casing 22, therefore can guarantee the rigidity of the linking portion of body housing 20 and preceding side body 21.

In addition, for example need situation to efferent 5 places under repair or maintenance under, as long as remove fixing before the screw 53 of side body 21, shown in figure 10, can keep the motionless and side body 21 before only removing of body housing 20, to efferent 5 places under repair etc.

On the other hand; Under for example need situation to motor 3 side places under repair or maintenance; As long as remove fixing left and right sides housing 23,24 screw 27 and fixing before the screw 53 of side body 21 and right shell body 24; Can that kind shown in figure 11, side body 21 is fixedly only removed right shell body 24 before keeping, and carries out the repairing of motor 3 grades etc.

Like this; Percussion drill 1 according to aforesaid way; Through the part accommodate efferent 50 is set in body housing 20 than body housing 20 more outstanding and inner casing 22 that gripped by left and right sides housing 23,24; In addition preceding side body 21 is assemblied in the front of body housing 20 with the state that overlaps with the protuberance 47 of inner casing 22; Make left and right sides housing 23,24 and preceding side body 21 can distinguish independent dismounting, thereby guaranteed the rigidity of the coupling part of body housing 20 and preceding side body 21, and to a certain side place under repair in body housing 20 sides and preceding side body 21 sides time; Also can deal with, improve the operation property of repairing etc. through the removal corresponding shell.

Especially here; Left and right sides housing 23,24 is fixed with screw in the outstanding position of being located at mutual inner surface and under assembled state, being the tubular protuberance 25,26 of the shape that is coaxial docking each other; Being arranged on the position that is assembled in the body housing 20 on this external inner casing 22 can be by the locating hole 45 of boss 25 perforations; At screw fixedly in the left and right sides housing 23,24, can position fixingly to inner casing 22, therefore can inner casing 22 be assembled in the body housing 20 with reasonable and higher precision.Make that thus the position relation of motor 3 and efferent 5 is stable, bring influence can for the rotation transmission.

In addition; With motor 3 with output shaft 4 up and the lower end of output shaft 4 inclination attitude that more relies on the place ahead than the upper end be housed in the downside of inner casing 22; And the upper end of output shaft 4 is inserted into helical gear 18 engagements of the input that makes it and be arranged on efferent 5 in the inner casing 22, can carry out effectively from the rotation transmission of motor 3 thus to efferent 5.

In addition; In the above-described embodiment; Though the prominent bar that is arranged on inner casing is clamped between body housing and the preceding side body; But the outstanding projection of discontinuity also can be set and be not limited to prominent bar, also can not adopt this clamp structure, and the inner surface of side body before the protuberance of inner casing is connected to.

In addition, the quantity or the shape of the locating hole that is provided with on the inner casing are not limited to aforesaid way, can also locating hole be arranged on plate portion but not tube portion, also can be arranged on upper and lower sides and not only at the rear portion of inner casing for the position of protuberance.Certainly can also omit locating hole, and be arranged on the fin of the inner surface of cutting apart housing or the seat surface of recessed setting waits the outer surface that keeps inner casing through outstanding.

And percussion drill also is not limited to the aforesaid way that kind is contained in motor forward, lower part with inclination attitude type.For example, motor is tilted and on above-below direction, accommodate, be housed in the rear of efferent before perhaps motor being dashed.But in the above-described embodiment; Since motor with respect to the cell arrangement at heavier rear in the place ahead; Therefore at whole machine balancing preferably on the basis; Handle is configured on the axis of drill bit with the mode near the rear of efferent, thus can be near the rear axis of drill bit with percussion drill bulldozing operation forwards.Has the superior advantage of operability thus.

In addition, the change in design that also can suit is for other modes, do not adopt oblique bearing and adopts the connecting-rod bearing, do not adopt the mode of piston cylinder and piston relative fixed cylinder sleeve is moved back and forth, do not use dc source and use AC power etc. like efferent.

In addition, the present invention is not limited to percussion drill, so long as the divisible type that is body housing and preceding side body also can adopt for other electric tools such as electrically operated hammer or electric drill, impact screwdrivers equally.

In addition; According to percussion drill 1; Make the end face butt of a side of end and the ball bearing 31 of the sleeve 32 that is pressed into output shaft 4, the bearing baffle 37 with the opposite side end face butt of ball bearing 31 is set on this external inner casing 22, utilize sleeve 32 and bearing baffle 37 clamping ball bearings 31; Output shaft 4 is located on direction of principal axis, thereby can come accurately output shaft 4 to be positioned through the simple formation of utilizing existing sleeve 32.Can keep thus and the correct engagement of 18 of helical gears, obtain favorable durability.

Especially here; Through bearing baffle 37 being made as the semicircle shape with the roughly half cycle part butt of ball bearing 31; Can make bearing baffle 37 solve need, when having suppressed the increase of cost, can also easily carry out assembling inner casing 22 to the location of output shaft 4 with minimal formation.

In addition, through being set at bearing baffle 37, fastening realizes to carry out assembling more simply to inner casing 22 to the fastening pawl 40 of the location of the installation site of inner casing 22 in the screw fixed part 41 that is arranged on inner casing 22.

In addition; In the above-described embodiment; Though the output shaft to motor adopts locating structure; But for example intermediate rotary shaft (jackshaft) and output shaft be supported on output shaft abreast and as the gear of the input of efferent between and under the situation of the gears engaged of output shaft transmission rotation and this intermediate rotary shaft and input,, can adopt the locating structure of adding bearing baffle equally as long as will seal the bearing portions that the sleeve of usefulness is contained in intermediate rotary shaft outward.

In addition, bearing baffle can partly assemble from the half cycle of an opposite side with aforesaid way or from the assembling of the upside of output shaft, and is not limited to semicircle shape, can adopt other shapes of C word shape etc.And quantity is not limited to 1, for example can be with circular-arc the fitting together of a plurality of weak points.

In addition, to the assembling of housing, can carry out screw from the open side of inserting mouth and fix or omit fastening pawl etc.

And also be not limited to ball bearing as bearing, use of the present invention is not adopted the influence of other kinds class bearings such as needle bearing or bearing metal.Certainly the electric tool that is suitable for also comprises the other types beyond the percussion drill.

Claims (3)

1. hand-held working tool, make front end tool linearly shape drive along long axis direction, the operations that this front end tool is put rules into practice is characterized in that,

Have front end area install removably above-mentioned front end tool the power tool body and

Rear side on above-mentioned power tool body and above-mentioned front end tool opposition side configuration be made for the handle that the dealer grips,

Above-mentioned handle links via elastomer and above-mentioned power tool body, and above-mentioned handle can relatively be free to slide on the long axis direction of above-mentioned front end tool with respect to this power tool body,

Above-mentioned power tool body has to the lower zone of above-mentioned handle and extends and the elongated area of bearing the sliding action of this handle,

Above-mentioned power tool body and above-mentioned handle; Upper end and bottom at this handle link together via guide part; This guide part allows the relative sliding action along long axis direction of above-mentioned front end tool, and restriction relatively moving to this long axis direction direction in addition

Above-mentioned handle forms the frame structure of closed hoop by following three parts, is respectively: the upwardly extending hand grip portion of upper and lower that intersects at the long axis direction with above-mentioned front end tool; Each one the arm up and down that extends to long axis direction equidirectional respectively from the bearing of trend end of this hand grip portion with above-mentioned front end tool; The cross part that the extended end of last lower arm part is bonded with each other,

In the lateral side regions parallel above-mentioned handle with long axis direction above-mentioned front end tool, be set with the sliding surface that above-mentioned relatively power tool body can be free to slide,

Above-mentioned sliding surface has second sliding area of the above-below direction extension that the bearing of trend of first sliding area that extends along the long axis direction of above-mentioned front end tool and edge and this first sliding area intersects,

Above-mentioned first sliding area is set in the side of above-mentioned arm, and above-mentioned second sliding area is set in the side of above-mentioned cross part, can suppress above-mentioned handle becoming flexible on left and right directions.

2. hand-held working tool according to claim 1 is characterized in that,

Have electro-motor that drives above-mentioned front end tool and the storage source that is used as the power supply of this electro-motor,

Constitute the storage source installation portion that can supply above-mentioned storage source to install removably freely to the above-mentioned elongated area that the lower zone of above-mentioned handle extends.

3. hand-held working tool according to claim 2 is characterized in that,

Above-mentioned guide part is made up of the long axis direction along above-mentioned front end tool groove that extends and the protuberance that can engage with this groove with relatively moving, and this protuberance is made up of metallic pin.

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