CN101537610A - Impact tool - Google Patents
Impact tool Download PDFInfo
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- CN101537610A CN101537610A CNA2009101294675A CN200910129467A CN101537610A CN 101537610 A CN101537610 A CN 101537610A CN A2009101294675 A CNA2009101294675 A CN A2009101294675A CN 200910129467 A CN200910129467 A CN 200910129467A CN 101537610 A CN101537610 A CN 101537610A
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Abstract
It is an object of the invention to provide a technique which is effective in improving the durability of an angular positioning device of a tool bit and in reducing weight of a tool body in an impact tool. A representative impact tool includes a tool body, a lubricant sealed in the housing space, a driving mechanism, a tool holder, an angular positioning device disposed on a tip end side of the tool body and serves to fix a position of the tool bit around the axis with respect to the tool body. The angular positioning device includes first and second locking members. The first locking member is disposed between the tool body and the tool holder. The second locking member is disposed opposite to the first locking member. One end of the first locking member in the axial direction of the tool bit extends into the housing space of the tool body and is connected to the tool body within the housing space.
Description
Technical field
The present invention relates to the constructing technology of percussion tools such as electric hammer and electric hammer brill.
Background technology
Japanese kokai publication hei 11-104974 communique discloses a kind of percussion tool, and it has when the hammering operation angle positioning device that electric hammer drill is positioned with respect to the relative position that makes progress in week of tool body.This angle positioning device is configured in the cylindrical portion tip side that constitutes tool body.Angle positioning device has: cylindrical portion and Lock Part, this Lock Part links with relative consistently this drilling tool clamper of the chimeric mode of spline between the drilling tool clamper that keeps electric hammer drill, and can link by the engagement of jog and with its binding or releasing with respect to cylindrical portion.Thus, under the state of parts with respect to the binding of cylindrical portion that unlock, upwards suitable rotation comes adjusting position in week with the drilling tool clamper with tool bit, then by linking and the position of positioning and fixing after regulating again.
When constituting at cylindrical portion apex zone arrangement angles positioner, because the position is near the tool bit as anchored object, so advantage is that the operability of angle positioning device is higher, but can be subjected to the influence of the dust of the work piece (concrete) that when the hammering operation, produces.That is, because dust invades the linking part of the linking part of Lock Part and drilling tool clamper or Lock Part and cylindrical portion and each linking part that weares and teares easily.Therefore for comprising cylindrical portion,, for example can form with the higher material of mar proofs such as ferrous materials in order to improve durability at each interior parts.On the other hand, the hand-held percussion tool that carries out the hammering operation of operator requires lightweight as far as possible, and particularly for the cylindrical portion that occupies big volume, this requirement is very high.But, when forming cylindrical portion, then there is the problem that can't guarantee the mar proof requirement again than light nonferrous metal of ferrous materials or synthetic resin etc., this respect waits to improve.
In addition, TOHKEMY 2000-127066 communique discloses a kind of percussion tool, and it has impact absorption mechanism, the impact when being used to tackle sky and hitting.Specifically be constructed as follows, when tool bit separates with work piece and impulse member when still carrying out percussion action,, thereby absorb the impact that the impact of impulse member produces then by bearing the load of the middleware that forwards moves with this impulse member with elastomer.That is the impulse member when, the impact absorption mechanism in the existing percussion mechanism mainly hits for sky impacts to be accepted with an elastomer.Therefore, the suffered load of elastomer need improve aspect durability greatly.
Summary of the invention
But the present invention's the 1st purpose is to provide a kind of raising and more light-weighted percussion tool of durability of angle positioning device of implementation tool drill bit.
The present invention's the 2nd purpose is to improve the durability of this impact absorption mechanism in the percussion tool with sky impact absorption mechanism when hitting.
In order to realize above-mentioned the 1st purpose, in the optimal way of percussion tool of the present invention, the hammering operation that percussion tool is stipulated work piece by the percussion action of the long axis direction of tool bit, it comprises: the tool body with receiving space; Be sealing into the lubricant in the receiving space; Driving mechanism is contained in receiving space and will be at the tool bit of tool body apex zone configuration along impacting in long axis direction.And, among the present invention " the hammering operation of regulation " be not only the hammering operation that tool bit carries out the percussion action of linearity, and the suitableeest electric hammer that carries out the linearity percussion action and rotate in a circumferential direction the action that comprises bores operation.
The optimal way of percussion tool according to the present invention has: the drilling tool clamper, and above-mentioned tool bit remained to do around long axis direction relatively rotate, and being configured on the tool body around the mode that the tool bit long axis direction rotates; Angle positioning device is determined the relative position around long axis direction of tool bit with respect to this tool body in the configuration of tool body tip side.Angle positioning device has the 1st and the 2nd Lock Part.The 1st Lock Part, on the direction of intersecting with the tool bit long axis direction, be configured between tool body and the drilling tool clamper, and be joined into relative tool body and can't do around the tool bit long axis direction and relatively rotate, can do relatively rotating around the tool bit long axis direction with respect to the drilling tool clamper.The 2nd Lock Part, be relative shape with the 1st Lock Part, be joined under the state of allowing and do relatively rotating around the tool bit major axis with respect to the drilling tool clamper along the mobile quilt of the long axis direction of tool bit, and according to along the moving of tool bit long axis direction, can be joined into to do and relatively rotate or remove this binding around the tool bit long axis direction with respect to above-mentioned the 1st Lock Part.And " the 1st and the 2nd Lock Part " among the present invention typically constitutes by cartridge, suitably comprises the mode that is made of half cartridge.
Angle positioning device among the present invention is configured in the tool body apex zone.This position is with close position event has higher operability as the tool bit of anchored object, but the wearing and tearing easily owing to when the hammering operation, be exposed to dust.Therefore in the present invention, constitute in the receiving space that is attached at this tool body with the 1st Lock Part and tool body carry out, be to link in the oil.Therefore, the bond sites of the 1st Lock Part and tool body, the harmful effect of dust in the time of can avoiding the hammering operation, and can protect by the lubricant of being enclosed in the receiving space.Therefore for the tool body that occupies bigger volume than the 1st and the 2nd Lock Part, eliminated wear problem, thereby nonferrous metal such as aluminium alloy by for example comparing light weight with ferrous materials or synthetic resin form the lightweight that realizes percussion tool.On the other hand, for the 1st Lock Part and the 2nd Lock Part, the ferrous materials formation higher with mar proof then can improve durability.
According to percussion tool alternate manner of the present invention, on the tool bit long axis direction, be provided with the 3rd Lock Part between the 1st Lock Part and the 2nd Lock Part, the 3rd Lock Part by constant binding, and can link or remove this binding with respect to the 1st Lock Part according to along moving of tool bit long axis direction and relatively the 2nd Lock Part of the 2nd Lock Part.Other the 3rd Lock Part is also brought into play the function of stopper section, an i.e. side and the tool body butt of the 3rd Lock Part on the direction of intersecting with the tool bit long axis direction, the face butt of the direction that set and long axis direction intersect on another side and the drilling tool clamper, thereby the moving to the receiving space direction of limiting this drilling tool clamper.Promptly constitute in the present invention, the drilling tool clamper with respect to the tip side end face of the tool bit long axis direction of tool body via the 3rd Lock Part butt with it, the moving to the receiving space side of limiting the drilling tool clamper thus.
For example, the drilling tool clamper is being inserted and when assembling in tool body, needs to prevent to come off from tool body after inserting the drilling tool clamper from the receiving space side direction tip side of tool body.According to the present invention, after inserting the drilling tool clamper, this drilling tool clamper is installed back-up ring, then this back-up ring and tool body butt and with restriction the 3rd Lock Part butt that direction moves that comes off, the direction that comes off mobile of limiting the drilling tool clamper thus.Promptly, make the 3rd Lock Part not only have original positioning function, and have the stopper section function of drilling tool clamper, thereby make up rational disconnecting prevention structure according to the present invention.
According to the alternate manner of percussion tool of the present invention, the 2nd Lock Part and the 3rd Lock Part constitute being meshing with each other by the jog that is provided with on zone respect to one another on the tool bit long axis direction and link together.Adopt this formation then can on the tool bit long axis direction, realize and the binding of the 3rd Lock Part and the releasing of this binding by making the 2nd Lock Part mobilelyly and smooth-goingly.
The alternate manner of percussion tool according to the present invention, angle positioning device has along the functional unit of above-mentioned the 2nd Lock Part of tool bit long axis direction move operation, one end of this functional unit is connected with above-mentioned the 2nd Lock Part, and the other end is exposed to above-mentioned tool body outside and can be made for dealer's manual operation.According to the present invention, can be convenient to the 2nd Lock Part be operated from the tool body outside.
The alternate manner of percussion tool according to the present invention, on the direction of intersecting with the tool bit long axis direction, between tool body and the drilling tool clamper, be disposed radially the drilling tool clamper guide part that forms with ferrous materials, this drilling tool clamper guide part has constituted the 1st Lock Part.Constitute by this, can form i.e. the 1st Lock Part and realize the raising of durability of drilling tool clamper guide part with ferrous materials.
And then in order to realize the invention described above the 2nd purpose, the percussion tool of the hammering operation that the percussion action that other optimal way of percussion tool of the present invention provides a kind of long axis direction by tool bit is stipulated work piece, it has impulse member, middleware, the 1st is subjected to portion, the 2nd to be subjected to portion, the 1st elastomer, the 2nd elastomer.When above-mentioned impulse member surpassed the predetermined impact position and continues that forwards move the position in order to impact middleware, the 1st was subjected to portion and this impulse member butt.When above-mentioned middleware be subjected to surpassing impact position forwards the impulse member that moves of position impact and when forwards mobile, the 2nd is subjected to portion and this middleware butt.The 1st elastomer and the 1st is subjected to portion's butt, and can produce strain because of the impact that impulse member and the 1st is transmitted by the butt of portion to come.The 2nd elastomer, limit moving forwards by tool body or by this tool body restriction tool body side component that moves forwards, and with the 1st be subjected to portion and the 2nd portion of being subjected to butt respectively, the 2nd elastomer is subjected to impact that portion's butt produces and transmits the impact that the middleware and the 2nd that comes is produced by portion's butt from the 2nd portion of being subjected to from the impulse member and the 1st that the 1st portion of being subjected to transmits owing to being subjected to, and the generation strain.
The optimal way of percussion tool according to the present invention constitutes the 1st and is subjected to portion and the 2nd to be subjected to portion with respect to the 2nd elastomer butt arranged side by side.And " side by side butt " among the present invention preferably is contained in the directly state of butt or at the tool bit week state of butt side by side upwards side by side upwards of tool bit.According to the present invention, can share absorption impulse member sky by the 1st and the 2nd elastomer and hit the impact that action produces, thereby can improve elastomeric durability.And be the 1st to be subjected to portion and the 2nd to be subjected to the formation of portion in the present invention, with respect to the 2nd elastomer butt arranged side by side.Thus, be subjected to portion and impulse member butt and the 2nd to be subjected to the sequential of portion and middleware butt regardless of the 1st, the impact of impulse member side can both be transmitted efficiently to the 2nd elastomer.And the typical case of " the 1st elastomer and the 2nd elastomer " among the present invention is a rubber.And " the 1st elastomer and the 2nd elastomer " can suitably select continuous any one of state of the state of shape configuration or interrupted shape configuration of long axis direction (circumferentially) around tool bit respectively for use.
The alternate manner of percussion tool according to the present invention, the 1st is subjected to portion and the 2nd to be subjected to a certain side and the 2nd elastomeric outside diameter butt of portion, and the opposing party then constitutes and the 2nd elastomeric internal side diameter butt.By this formation, can realize transmitting to the 2nd elastomeric impact in the reasonable configuration mode from the 1st and the 2nd portion that is subjected to.
According to the alternate manner of percussion tool of the present invention, the 1st portion that is subjected to is made of the ladder parts that have forwards outstanding protuberance in the outside, and via this protuberance and the 2nd elastomeric outside diameter butt.And " protuberance " typical case among the present invention is the mode that circumferentially is provided with continuous shape at tool bit, but suitably also optionally is arranged on the circumferential mode of tool bit in order to interrupted shape.The present invention is by above-mentioned formation, can avoid and is subjected to the interference of portion at the 2nd of the 2nd elastomer internal side diameter butt, and impacted to the 2nd elastomeric outside diameter transmission by the protuberance of portion via the 1st.And when the 2nd portion of being subjected to for example is made of the drilling tool clamper that keeps tool bit, can avoid interference with this drilling tool clamper, even when therefore assembling with state to the 1st and the 2nd elastomer preload, can be to drilling tool clamper effect resistance yet.Therefore when making the drilling tool clamper circumferentially rotate to determine the circumferential position of tool bit, can not influence operability with tool bit.
The alternate manner of percussion tool according to the present invention, have ladder parts clamping the 1st elastomer of protuberance and be configured in front side and rear side respectively, the ladder parts of front side and the ladder parts of rear side form same shape, and are configured oppositely to press from both sides the 1st elastomer.Constitute by this, the ladder parts before and after can making are general purpose accessory.Therefore can eliminate loading error and improve the assembling of assembling work.
In addition, in percussion tool, have sky and hit anti-locking mechanism, when impulse member surpasses impact position further forwards move the position, this impulse member is remained in anterior position and avoid sky to hit action and carry out repeatedly.This sky hits anti-locking mechanism to have: cylinder thorax space, the place ahead forms in the working cylinder the place ahead of accommodating impulse member slidably and is used to prevent that sky from hitting; With the passage that is communicated with between the inside in this cylinder thorax space, the place ahead and the outside; Check-valves cuts out this passage all the time and surpasses impact position at impulse member and continue in the cylinder thorax space forwardly when forwards mobile, is pushed laterally by the air of discharging from passage to retreat.When the impulse member that slides in working cylinder surpasses predefined middleware impact position and continues when forwards mobile, air in the cylinder thorax space, the place ahead is compressed by impulse member, pushes check-valves (O type circle) and it is retreated to discharge to the outside from the passage that forms at this working cylinder.And, after this when impulse member is got back to the impact front position, limit extraneous air by check-valves and flow into, make the interior space of the place ahead cylinder thorax negative pressureization come this inhibition impulse member to return effect, thus impulse member is remained in than the anterior position of impacting the position and prevent that sky from hitting action and proceeding.Hit in the anti-locking mechanism at the sky that utilizes this check valve structure, when this check-valves is retreated by the air pushing from the passage discharge, might on the tool bit long axis direction, cause the position skew.
According to the present invention, have under the situation of percussion tool that above-mentioned sky hits anti-locking mechanism being applied to, the protuberance of ladder parts and the axial sides of check-valves relatively are configured, check-valves is being pushed laterally when retreating thus, can suppress protuberance in the shift in position of this check-valves on axially, prevent the drawback that the dislocation owing to check-valves produces.
The alternate manner of percussion tool has working cylinder according to the present invention, and it accommodates impulse member and along the rear end face and the tool body butt of tool bit long axis direction, and its place ahead end face and the 1st is subjected to portion's butt.And the 1st and the 2nd elastomer to add the state assembling of ordinance load in advance, is fixed in working cylinder the tool bit long axis direction respectively thus.According to the present invention, can pass through the 1st and the 2nd elastomeric bounce steady job cylinder, thereby omit working cylinder component for fixing (O type circle).And the low vibrationization of the loosening realization that can suppress working cylinder.
Description of drawings
Fig. 1 is the cutaway view of all formations of the electric hammer of expression embodiment of the present invention.
The cutaway view that Fig. 2 constitutes for expression electric hammer major part.
Fig. 3 is the amplification view that the expression angle positioning device constitutes, the state after the limit rotation state that the drilling tool clamper is shown is promptly located.
The amplification view that Fig. 4 constitutes for the expression angle positioning device, state is allowed in the rotation that the drilling tool clamper is shown.
Fig. 5 is different from the amplification view that the angle positioning device at the section position of Fig. 3 and Fig. 4 constitutes.
Fig. 6 is all cutaway views that constitutes of the electric hammer of expression embodiment of the present invention.
The cutaway view that Fig. 7 constitutes for expression electric hammer major part, the state when common percussion action is shown.
Fig. 8 is the cutaway view that expression electric hammer major part constitutes, the state when sky being shown hitting.
Fig. 9 is the partial enlarged drawing of Fig. 8.
The specific embodiment
(the 1st embodiment)
Followingly the present invention's the 1st embodiment is described with reference to Fig. 1～Fig. 5.Present embodiment is that example describes with the electric hammer as percussion tool.Fig. 1 illustrates electric hammer 101 and all constitutes, and Fig. 2 amplification illustrates electric hammer 101 major parts and constitutes.Fig. 3～Fig. 5 amplification shows determines that electric hammer drill constitutes with respect to the angle positioning device of the circumferential relative position of body.Fig. 3 represent the drilling tool clamper the limit rotation state, be positioning states, allow state and Fig. 4 represents the rotation of drilling tool clamper.The angle positioning device that Fig. 5 represents to be different from the section position of Fig. 3 and Fig. 4 constitutes.
As shown in Figure 1, the electric hammer 101 of present embodiment mainly comprises taken one with another: the body 103 that forms electric hammer 101 profiles; The drilling tool clamper 137 that is connected with the apex zone (diagram left side) of these body 103 long axis directions; The electric hammer drill of on this drilling tool clamper 137, releasably installing 119; The handle 109 that is made for dealer's gripping that is connected with the other end (diagram right side) of body 103 long axis directions.Body 103 is corresponding with " tool body " among the present invention, and electric hammer drill 119 is corresponding with " tool bit " among the present invention.Electric hammer drill 119 with respect to drilling tool clamper 137, can carry out relative reciprocating motion, and keep along its circumferential confined state that relatively rotates on its long axis direction (body 103 long axis directions).And as the front side, handle 109 sides are as rear side for convenience of explanation and with electric hammer drill 119 sides.
The rotation of drive motors 111 output is transmitted to impact components 115 after being transformed to rectilinear motion by motion changing mechanism 113 is suitable, and is produced the impulsive force of the long axis direction (left and right directions among Fig. 1) of electric hammer drills 119 via this impact components 115.Drive motors 111 is configured to the axis of motor shaft 112 and the long axis of electric hammer drill 119 forms cross-like.Motion changing mechanism 113 and impact components 115 are corresponding with " driving mechanism " among the present invention.
The electric hammer 101 of the 2nd embodiment, when applying its body 103, the operator is in towards preceding pushing force under the load condition (Fig. 1 and state shown in Figure 2) that electric hammer drill 119 is pressed against work piece, if drive motors 111 is energized driving, then can make piston 125 carry out the linearity sliding action via the motion changing mechanism 113 that with the crank mechanism is the main body formation along working cylinder 141.When piston 125 carries out sliding action, under the effect of the air spring of the air chamber 141a of working cylinder 141, ram 143 is forwards moved in working cylinder 141 and with impact double-screw bolt 145 collisions, thereby its kinetic energy is passed to electric hammer drill 119.Thus, 119 pairs of work pieces of electric hammer drill (concrete) are carried out the hammering operation.
Below with reference to Fig. 2～Fig. 5 angle positioning device 181 is described, it is used for is that circumferential angle position positions to the electric hammer drill 119 that keeps on drilling tool clamper 137 around long axis direction.Angle positioning device 181 is provided with at cylindrical portion 108 apex zones (leading section side).Angle positioning device 181 mainly has the drilling tool clamper guide part 183 that is made of approximate cartridge, the positioning and fixing change ring 187 of retainer 185 and approximate cup-shaped of approximate circle ring-type.Drilling tool clamper guide part 183 remains drilling tool clamper 137 can rotate around the electric hammer drill major axis, and can't link all the time with respect to cylindrical portion 108 with relatively rotating.Positioning and fixing can't link all the time with retainer 185 and drilling tool clamper guide part 183 with relatively rotating.Change ring 187 limits 137 rotations of drilling tool clamper by linking with retainer 185, and allows that by removing with the binding of retainer 185 drilling tool clamper 137 rotates.Drilling tool clamper guide part 183 is corresponding with " the 1st Lock Part " among the present invention, and change ring 187 is corresponding with " the 2nd Lock Part " among the present invention, and 185 of retainers are corresponding with " the 3rd Lock Part " among the present invention.
In addition, the leading section 183c of the long axis direction of drilling tool clamper guide part 183, forwards outstanding from cylindrical portion 108 front ends with specific length, on this outstanding leading section 183c along circumferentially with the suitable a plurality of groove 183d (with reference to Fig. 5) that are formed with at interval.On the periphery of the leading section 183c of drilling tool clamper guide part 183, dispose retainer 185 made of iron.Be radially a plurality of pawl 185a of standing shape of court along being circumferentially with accordingly in interior all sides of retainer 185 and the groove 183d of leading section 183c, this pawl 185a engages (with reference to Fig. 5) with the groove 183d of leading section 183c.Thus, drilling tool clamper guide part 183 upwards can't link in week all the time with retainer 185 with relatively moving.And at the outer circumferential side of retainer 185 along circumferentially uniformly-spaced being formed with a plurality of location with groove (recess) 185b (with reference to Fig. 4).
On the approaching position of the leading section of the periphery of drilling tool clamper 137 and drilling tool clamper guide part 183, back-up ring 197 is installed, but the internal side diameter front end face butt ground relative (with reference to Fig. 5) of this back-up ring 197 and the pawl 185a of retainer 185.On the other hand, the front end face 108e butt that intersects with long axis direction of retainer 185 and cylindrical portion 108.Therefore, retainer 185 is used as the stopper section that anticreep is used, and promptly limits moving of rearward (the inner space 108d side of cylindrical portion 108) of drilling tool clamper 137 on being mounted to cylindrical portion 108 time.
Change ring 187 is iron, is configured in the place ahead of retainer 185 and in drilling tool clamper 137 peripheries.Change ring 187, its front side minor diameter part is installed on the drilling tool clamper 137 by spline chimeric 186, is joined into thus to move and can't upwards relatively rotate in week at long axis direction.Change ring 187 rear end faces promptly with the opposite face side of retainer 185, with the location of this retainer 185 with groove 185b accordingly along circumferentially equally spaced being formed with a plurality of location pawl 187a.And, at change ring 187 when moving with the near rear of retainer 185 side joints, this pawl 187a can mesh with groove 185b with the location of retainer 185, can't upwards relatively move in week thereby change ring 187 is joined into relative retainer 185, with the limited in rotation of drilling tool clamper 137.On the other hand, when change ring 187 when move in the place ahead of separating with retainer 185, the engagement between the groove 185b of pawl 187a and retainer 185 can be disengaged, and allows with drilling tool clamper 137 and rotates.The location is corresponding with " jog " among the present invention with groove 185b and pawl 187a.
Be that change ring 187 can be engaged in the groove 185b of retainer 185 and be fastened togather and limits the limit rotation position that drilling tool clamper 137 rotates at pawl 187a, and pawl 187a separate with the groove 185b of retainer 185 and allows that rotation that drilling tool clamper 137 rotates is allowed between the position and move along long axis direction.And change ring 187 is used as the helical spring 189 of force application part to the limit rotation position application of force, thereby short ofly makes it allow the external force effect of moving the position to rotation, promptly keeps the limit rotation state of drilling tool clamper 137.
In addition, on change ring 187, be connected with as making this change ring 187 allow the operation sleeve pipe 191 of the functional unit that moves between the position in limit rotation position and rotation.The operation sleeve pipe 191, its front is installed on the change ring 187 via back-up ring 193, make long axis direction relatively move and circumferential relatively rotating respectively is restricted.Promptly operate sleeve pipe 191 and form with change ring 187 and be integrated, and end side is exposed to the outside of the circular cylindrical shell 106 that covers cylindrical portion 108 thereafter, can be made for the dealer and operate from the outside.And, helical spring 187 is with between the front end face getting involved shape and be arranged on operation sleeve pipe 191 and the spring base 195 in the above-mentioned drill bit holding device 136 of the top ends configuration of drilling tool clamper 137, thereby to operating the elastic force that sleeve pipe 191 and change ring 187 act on towards the limit rotation position.
The above is the formation of the angle positioning device 181 of present embodiment.Below the effect of angle positioning device 181 is described.When determining electric hammer drill 119 with respect to the circumferential relative position of cylindrical portion 108, the elastic force that the operator manually makes operation sleeve pipe 191 overcome helical spring 189 forwards moves, and makes change ring 187 allow that to rotation the position moves.Thus, the pawl 187a of change ring 187 separates with the groove 185b of retainer 185, allows relatively rotating of drilling tool clamper 137 relative cylindrical portion 108 (drilling tool clamper guide parts 183).Promptly remove positioning and fixing.The circumferential rotating operation sleeve pipe 191 in edge if then keep this disarm state, drilling tool clamper 137 is rotated with the change ring 187 that is integrated with this operation sleeve pipe 191, and then electric hammer drill 119 and drill bit holding device 136 are rotated with drilling tool clamper 137.Therefore, determine the circumferential relative position of electric hammer drill 119 with respect to cylindrical portion 108.After this, if change ring 187 is moved with operation sleeve pipe 191 rearward limit rotation positions, then pawl 187a meshes once more with the groove 185b of retainer 185 and engages.Thus, electric hammer drill 119, drill bit holding device 136 and drilling tool clamper 137 are restricted with respect to the circumferential rotation of cylindrical portion 108, are fixed on the angle position behind the location.
Like this, angle positioning device 181 according to present embodiment, a hand is controlled for example cylindrical portion 108, the another hand is operated operation sleeve pipe 191, can carry out circumferential angle orientation to electric hammer drill 119, thereby can not influence the operability of existing angle positioning device, and can position electric hammer drill 119.
The angle positioning device 181 of present embodiment is configured in the apex zone of cylindrical portion 108.Therefore the position of the apex zone of cylindrical portion 108 can operate operation sleeve pipe 191 near electric hammer drill 119 near the electric hammer drill 119 as anchored object.Therefore can provide the higher angle positioning device of operability 181.But the shortcoming of this mode is that angle positioning device 181 is exposed under the dust when processing operation because of the apex zone that is configured in cylindrical portion 108, and it is that linking part is influenced by dust and wearing and tearing easily that the result causes slipper.Therefore, for parts,, then can cause electric hammer 101 weight to increase again if make it all adopt the higher material of mar proofs, for example ironly deal with wearing and tearing with linking part.
Constitute in the present embodiment, drilling tool clamper guide part 183 is set between drilling tool clamper 137 and the cylindrical portion 108, and this drilling tool clamper guide part 183 is extended to the inner space of cylindrical portion 108 108d, link with cylindrical portion 108 in the oil in the 108d of this inner space.Thus, can make linking part avoid the harmful effect of dust, and can protect by lubricant.Consequently, form with nonferrous materials such as for example aluminium alloys, thereby can alleviate wearing and tearing and reduce the weight of electric hammer 101 by being cylindrical portion 108 with the parts that volume is bigger in the associated components of angle positioning device 181.On the other hand, form with the higher material of mar proofs such as ferrous materials for 187 of drilling tool clamper guide part 183, retainer 185 and change rings, thereby improved durability.
In addition, when the assembling work of electric hammer 101, before the assembling of cylindrical portion 108 and crank housings 107, this cylindrical portion 108 is assembled drilling tool clamper guide part 183, drilling tool clamper 137, retainer 185, cushion rubber 163 and plain washer 165 at least.This assemble sequence for example is: in the drilling tool clamper retaining hole 108b of cylindrical portion 108, insert drilling tool clamper guide part 183 from its rear, then will be pre-assembled the drilling tool clamper 137 of plain washer 165 and cushion rubber 163, insert from the rear in the tube hole of drilling tool clamper guide part 183, nested retainer 185 on the leading section 183a of drilling tool clamper guide part 183 periphery is installed back-up ring 197 then on drilling tool clamper 137 then.The drilling tool clamper 137 that is assembled like this by be connected to the internal side diameter front end face of the pawl 185a of retainer 185 with back-up ring 197, will be avoided coming off.Promptly according to present embodiment, retainer 185 also is used as the stopper section that prevents that drilling tool clamper 137 from coming off except that the circumferential positioning function that is endowed drilling tool clamper 137.Thus, can cylindrical portion 108 be assembled on the crank housings 107, thereby improve the operation of assembling with the modularization state of a plurality of parts of assembled in advance on cylindrical portion 108.
In addition, though present embodiment is constituted as between drilling tool clamper guide part 183 and change ring 187 retainer 185 is set, but also can omit this retainer 185 and be transformed into change ring 187 relative drilling tool clamper guide parts 183 directly link or remove the binding formation.And in the present embodiment as the example of percussion tool, electric hammer drill 119 only is illustrated at the electric hammer 101 that long axis direction carries out percussion action, but with regard to angle positioning device 181, allow that by appending for example change ring 187 to be fixed on the rotation that drilling tool clamper 137 rotates allows the mechanism of position, promptly applicable to electric hammer drill 119 being rotated in a circumferential direction during the electric hammer of action bores when long axis direction carries out percussion action.
(the 2nd embodiment)
Followingly other embodiment of the present invention is described with reference to Fig. 6～Fig. 9.The 2nd embodiment for above-mentioned the 1st embodiment percussion tool that is identical formation, so the suitably identical explanation of omission.
The electric hammer 101 of the 2nd embodiment, when applying its body 103, the operator is in towards preceding pushing force under the load condition (Fig. 6 and state shown in Figure 7) that electric hammer drill 119 is pressed against work piece, if drive motors 111 is energized driving, then can make piston 125 carry out the linearity sliding action via the motion changing mechanism 113 that with the crank mechanism is the main body formation along working cylinder 141.When piston 125 carries out sliding action, under the effect of the air spring of the air chamber 141a of working cylinder 141, ram 143 is forwards moved in working cylinder 141 and with impact double-screw bolt 145 collisions, thereby its kinetic energy is passed to electric hammer drill 119.Thus, 119 pairs of work pieces of electric hammer drill (concrete) are carried out the hammering operation.
In the moment that the operator removes the pushing force of 119 pairs of work pieces of electric hammer drill in order to finish the hammering operation, ram 143 carries out sky and hits action and promptly carry out percussion action with the no load condition of zero load effect on electric hammer drill 119.When this sky hits, ram 143 compare with load condition with impact impact position double-screw bolt 145 collisions, that promptly apply impact and move to more forward anterior position.For the sky that absorbs this ram 143 hits the impact that is produced, be provided with impact absorption mechanism 135 in cylindrical portion 108 front.Impact absorption mechanism 135 mainly has back buffer parts 151 and the preceding buffer unit 161 in electric hammer drill 119 long axis directions (fore-and-aft direction) shape configuration arranged side by side.
Fig. 7～Fig. 9 represents impact absorption mechanism 135.As Fig. 7～shown in Figure 9, back buffer parts 151 mainly has the 1st cushion rubber 153 of elastically deformable, the metal preceding ladder sleeve pipe 155 and the back ladder sleeve pipe 157 of front and back clamping the 1st cushion rubber 153 configurations, and is configured in the back minor diameter part 145b outside (periphery) of impacting double-screw bolt 145.The 1st cushion rubber 153 is corresponding with " the 1st elastomer " among the present invention, and preceding ladder sleeve pipe 155 and back ladder sleeve pipe 157 are corresponding with " the 1st is subjected to portion " among the present invention.Preceding ladder sleeve pipe 155 has towards electric hammer drill the long axis direction outstanding 155a of annulus portion, 157a at outside diameter respectively with back ladder sleeve pipe 157, and symmetric figure before and after becoming.The 155a of annulus portion of ladder sleeve pipe 155 is forwards outstanding promptly, and then the 157a of annulus portion of ladder sleeve pipe 157 is rearward outstanding.The 155a of annulus portion, 157a are corresponding with " protuberance " among the present invention.Back ladder sleeve pipe 157 is configured to the front end face butt of its back and working cylinder 141, and the 157a of annulus portion is covered in working cylinder 141 outsides.Before ladder sleeve pipe 155 be configured to described later before the back outside diameter butt of plain washer 165 of buffer unit 161.
Before outside buffer unit 161 mainly has the 2nd cushion rubber 163 of elastically deformable, the metal system plain washer 165 of configuration the 2nd cushion rubber 163 after and drilling tool clamper 137, the 2 cushion rubbers 163 and plain washer 165 are configured in the drilling tool clamper 137 that forms the approximate circle tubular the rear end side (periphery).The 2nd cushion rubber 163 is corresponding with " the 2nd elastomer " among the present invention, and drilling tool clamper 137 is corresponding with " the 2nd is subjected to portion " among the present invention.Between the inner face of the outer surface of drilling tool clamper 137 and cylindrical portion 108, be provided with drilling tool clamper guide part 139, the rear end face of this drilling tool clamper guide part 139 and the 2nd cushion rubber 163 butts of approximate circle tubular.Drilling tool clamper guide part 139 has expansion flange part 139a laterally in the rearward end of long axis direction, and this flange part 139a and the radially fastening face 108a butt that forms at the inwall of cylindrical portion 108 limit thus with respect to cylindrical portion 108 moving forwards.Drilling tool clamper guide part 139 is corresponding with " tool body side component " among the present invention.Drilling tool clamper 137 has the flange part 137a of expansion to outside diameter in the rearward end of long axis direction, the back internal side diameter butt of this flange part 137a and plain washer 165.
Promptly, back with respect to plain washer 165, the 155a of annulus portion of the preceding ladder sleeve pipe 155 of back buffer parts 151, and the flange part 137a of the drilling tool clamper 137 of preceding buffer unit 161 is in radially outside diameter and laterally butt configuration side by side of internal side diameter, when ram 143 skies hit action, the impact of ram 143 sides and the impact of impact double-screw bolt 145 sides can be transmitted (input) side by side thus.And, the wall thickness of flange part 137a (length of fore-and-aft direction) is set at the projecting height less than the 155a of annulus portion of preceding ladder sleeve pipe 155, thus C between the crack of setting out regulation between the front of the back of flange part 137a and the preceding ladder sleeve pipe 155 relative with it.
In impact absorption mechanism 135, between the flange part 139a back of drilling tool clamper guide part 139 and the front end face of working cylinder 141, from drilling tool clamper guide part 139 sides is the place ahead according to order shape configuration in upright arrangement on the electric hammer drill long axis direction of the flange part 137a of the 2nd cushion rubber 163, plain washer 165, drilling tool guide part 137, preceding ladder sleeve pipe the 155, the 1st cushion rubber 153, back ladder sleeve pipe 157, and assembles with the state that the 1st cushion rubber 153 and the 2nd cushion rubber 163 is applied in advance electric hammer drill long axis direction load.
And, impact double-screw bolt 145 to have in the zone that drilling tool clamper 137 keeps slidably be large-diameter portion 145a, the preceding minor diameter part 145c that forms in large-diameter portion 145a front side, at the back minor diameter part 145b of large-diameter portion 145a rear side formation, and between large-diameter portion 145a and preceding minor diameter part 145c, formed stepped cylindrical body with inner cone 145d.Impact double-screw bolt 145 forwards move through being restricted of inner cone 145d and drilling tool clamper 137 as the conical surface of inboard wall 137b butt of stopper section.And be set at, the back minor diameter part 145b that impacts double-screw bolt 145 is rearward outstanding and towards the cylinder thorax space, the place ahead 173 of working cylinder 141 from the rear end of drilling tool clamper 137, impact double-screw bolt 145 in the position that moves to the forefront (position of the conical surface of inboard wall 137b butt of inner cone 145d and drilling tool clamper 137), end face enters in the hole from the back of back ladder sleeve pipe 157 thereafter.Promptly be set at the front end face (shock surface) of ram 143 and separate.
The impact absorption mechanism 135 of present embodiment has above-mentioned formation, therefore remove in order to finish the hammering operation under the no load condition of pressing operation of 119 pairs of work pieces of electric hammer drill the operator, hit when action if ram 143 carries out sky, then this ram 143 can surpass original impact position further forwards the position move.When ram 143 surpass impact position forwards the position move and with after behind the back butt of ladder sleeve pipe 157, as Fig. 8 and shown in Figure 9, the kinetic energy warp of this ram 143 155a of annulus portion, plain washer the 165, the 2nd cushion rubber 163 and the drilling tool clamper guide part 139 of ladder sleeve pipe the 157, the 1st cushion rubber 153, preceding ladder sleeve pipe 155, this preceding ladder sleeve pipe 155 later transmits to cylindrical portion 108, and is absorbed by strain by the 1st cushion rubber 153 in this bang path and the 2nd cushion rubber 163.Impact when being ram 143 with the back butt of back ladder sleeve pipe 157 is absorbed by strain by the 1st cushion rubber 153 and the 2nd cushion rubber 163.
In addition, in the way of moving than impact more forward position, position, when impact double-screw bolt 145 applied impulsive force, this impacted double-screw bolt 145 and forwards moves the conical surface of inboard wall 137b butt of inner cone 145d and drilling tool clamper 137 at ram 143.Therefore, the flange part 137a, plain washer the 165, the 2nd cushion rubber 163 and the drilling tool clamper guide part 139 that impact the kinetic energy process drilling tool clamper 137 of double-screw bolt 145 transmit to cylindrical portion 108, are absorbed by strain by the 2nd cushion rubber 163 in this bang path.Impact when promptly impacting double-screw bolt 145 with drilling tool clamper 137 butts is absorbed by strain by the 2nd cushion rubber 163.
Like this, according to the impact absorption mechanism 135 of present embodiment, the impact that ram 143 skies hit action is absorbed by the 1st cushion rubber 153 and the 2nd cushion rubber 163, prevents from thus to impact to cylindrical portion 108 and transmits.
According to present embodiment, the impact when ram 143 and back ladder sleeve pipe 157 butts is not only born by the 1st cushion rubber 153, also is accepted the 2nd cushion rubber 163 that impacts double-screw bolt 145 and bears.Promptly can share impact, thereby alleviate the burden of the 1st cushion rubber 153 and the 2nd cushion rubber 163, improve durability by the 1st cushion rubber 153 and the 2nd cushion rubber 163.Particularly in the present embodiment, owing to can carry out ram 143 side by side with respect to the impact of the 2nd cushion rubber 163 with from the transmission of the impact of impacting double-screw bolt 145, therefore regardless of butt and the drilling tool clamper 137 and the butt sequential of impacting double-screw bolt 145 of back ladder sleeve pipe 157, the impact of ram 143 sides can both be transmitted efficiently to the 2nd cushion rubber 163 with ram 143.
In addition, the electric hammer 101 of present embodiment has sky in the front end area (apex zone) of working cylinder 141 and hits anti-locking mechanism 171, is used to prevent that ram 143 skies from hitting action and carrying out repeatedly.This sky hits anti-locking mechanism 171, do not push at electric hammer drill 119 under the no load condition of work piece and ram 143 compares impact position that electric hammer drill 119 applies impact when more forward anterior position moves, get back to carrying out repeatedly that the mode of impacting the front position prevents that sky from hitting by suppressing this ram 143.Sky hits cylinder thorax space, the place ahead 173 that anti-locking mechanism 171 mainly has working cylinder 141, with a plurality of passages 175 of the inside in this cylinder thorax space, the place ahead 173 and external communications, as the O type circle 177 of the elastically deformable of the check-valves of this passage 175 of switching.
Cylinder thorax space, the place ahead 173 is set at the space that surrounds later by the front of the cylinder thorax internal face of working cylinder 141, ram 143, the back of impacting double-screw bolt 145 and back ladder sleeve pipe 157.A plurality of passages 175 radially connect working cylinder 141 and configuration side by side on same circumference, and by the O type circle 177 in the configuration of working cylinder 141 outer peripheral face sides a plurality of passages 175 are sealed all the time.Be formed with the big opening 178 of this passage of sectional area ratio 175 in the rear position of working cylinder 141 upper vent holes 175, this opening 178 is arranged at can be by the position of all face closures of this ram 143 when ram 143 surpasses impact position.
Therefore, when ram 143 surpasses that impact position forwards moves and during sealing opening 178, air in the cylinder thorax space, the place ahead 173 are because ram 143 further forwards moves is compressed, and push O type circles 177 from passage 175 and it is retreated and discharge to the outside.Therefore, when ram 143 after this under the attraction force acts of the air chamber 141a of working cylinder 141 and when impacting the front position and return, the inflow restriction by 177 pairs of extraneous airs of O type circle makes and forms negative pressure in the cylinder thorax space, the place ahead 173.Thereby suppress the rebound effect of ram 143, ram 143 remains in the anterior position of impact position.The sky that can prevent ram 143 thus hits action to carry out repeatedly.
In the present embodiment, the 157a of annulus portion that is provided with on back ladder sleeve pipe 157 is configured to be relative shape with the front of O type circle 177.Therefore, when the air in the cylinder thorax space, the place ahead 173 by passage 175 when discharge the outside, restriction O type circle 177 is along forward mobile of long axis direction, can prevent forwards the dislocation on long axis direction of this O type circle 177 thus.And, also can be prevented by 179 pairs of these O type circles of the O type circle guide part that is installed on working cylinder 141,177 rearward mobile restrictions by rear position at this O type circle 177 for the dislocation backward of O type circle 177 on long axis direction.Thus, can guarantee of the return action of O type circle 177 to initial position (detent position).
And in the present embodiment, the 1st cushion rubber 153 and the 2nd cushion rubber 163 are assembled with the state (crimp state) that adds ordinance load in advance.Therefore, can working cylinder 141 be fixed into the state of the radially fastening face 107b of the tube hole 107a that is pressed against crank housings 107 by the bounce of the 1st cushion rubber 153 and the 2nd cushion rubber 163.Therefore can need not to be used for working cylinder 141 fixing fixed part (O type circle) in the tube hole 107a of crank housings 107 can be suppressed the loosening of working cylinder 141 simultaneously, and then realizes the low vibration of electric hammer 101.
In addition as mentioned above, by the bounce of the 1st cushion rubber 153 and the 2nd cushion rubber 163, the bearing surface, drilling tool clamper guide part 139 that has improved working cylinder 141 and back ladder sleeve pipe 157 respectively and the bearing surface of 163 of the 2nd cushion rubbers and the adaptation that cushions the mutual bearing surface of the component parts of absorbing mechanism 135.Consequently, improved the sealing relevant, and can improve the efficient that sky hits anti-locking mechanism 171 with cylinder thorax space, the place ahead 173.
In addition in the present embodiment, because the ladder sleeve pipe 157 of the ladder sleeve pipe 155 of front side and rear side forms same shape, and clamping the 1st cushion rubber 153 reverse configuration, therefore can eliminate loading error and improve assembling.In addition, for the 155a of annulus portion of preceding ladder sleeve pipe 155, used as the impact transference part part, and for the 157a of annulus portion of back ladder sleeve pipe 157, be rational used as dislocation limiting part as the O type circle 177 of check-valves.
In addition, the impact instrument is that example is illustrated with the electric hammer in the present embodiment, also can be suitable for the electric hammer brill that moves that rotates in a circumferential direction but carry out the linearity percussion action for electric hammer drill 119.
Claims (11)
1. percussion tool, the hammering operation that the percussion action of the long axis direction by tool bit is stipulated work piece is characterized in that, comprising:
Tool body with receiving space;
Be sealing into the lubricant of above-mentioned receiving space;
Driving mechanism is contained in above-mentioned receiving space, and will drive along long axis direction at the tool bit of above-mentioned tool body apex zone configuration;
The drilling tool clamper remains above-mentioned tool bit can't do around long axis direction and relatively rotates, and being configured on the above-mentioned tool body around the mode that the tool bit long axis direction rotates;
Angle positioning device is disposed at above-mentioned tool body tip side, determines the relative position around long axis direction of above-mentioned tool bit with respect to this tool body,
Above-mentioned angle positioning device has:
The 1st Lock Part, on the direction of intersecting with the tool bit long axis direction, be configured between above-mentioned tool body and the above-mentioned drilling tool clamper, and be joined into above-mentioned relatively tool body and can't do around the tool bit long axis direction and relatively rotate, can do relatively rotating around the tool bit long axis direction with respect to above-mentioned drilling tool clamper;
The 2nd Lock Part, on the tool bit long axis direction, be configured to be relative shape with above-mentioned the 1st Lock Part, and be joined under the state of allowing and do relatively rotating around the tool bit major axis with respect to above-mentioned drilling tool clamper along the mobile quilt of the long axis direction of tool bit, and according to moving along the tool bit long axis direction, can be joined into to do and relatively rotate or remove this binding around the tool bit long axis direction with respect to above-mentioned the 1st Lock Part
One end of the tool bit long axis direction of above-mentioned the 1st Lock Part extends setting to the receiving space of above-mentioned tool body, and links at this receiving space and above-mentioned tool body.
2. percussion tool according to claim 1 is characterized in that,
On the tool bit long axis direction, be provided with the 3rd Lock Part between above-mentioned the 1st Lock Part and above-mentioned the 2nd Lock Part, the 3rd Lock Part with respect to above-mentioned the 1st Lock Part by constant binding, and can link or remove this binding according to along moving of tool bit long axis direction and relatively the 2nd Lock Part of above-mentioned the 2nd Lock Part
Above-mentioned in addition the 3rd Lock Part is also brought into play the function of stopper section, an i.e. side and the above-mentioned tool body butt of the 3rd Lock Part on the direction of intersecting with the tool bit long axis direction, the face butt of the direction that set and long axis direction intersect on another side and the above-mentioned drilling tool clamper, thereby the moving to above-mentioned receiving space direction of limiting this drilling tool clamper.
3. percussion tool according to claim 2 is characterized in that,
Above-mentioned the 2nd Lock Part and above-mentioned the 3rd Lock Part are being by being meshing with each other of the jog that is provided with on zone respect to one another on the tool bit long axis direction, are engaging and link together.
4. percussion tool according to claim 1 is characterized in that,
Above-mentioned angle positioning device has along the functional unit of above-mentioned the 2nd Lock Part of tool bit long axis direction move operation, one end of this functional unit is connected with above-mentioned the 2nd Lock Part, and the other end is exposed to above-mentioned tool body outside and can be made for dealer's manual operation.
5. percussion tool according to claim 1 is characterized in that,
On the direction of intersecting with the tool bit long axis direction, between above-mentioned tool body and the above-mentioned drilling tool clamper, be disposed radially the clamper guide part that forms with ferrous materials, this clamper guide part has constituted above-mentioned the 1st Lock Part.
6. percussion tool according to claim 1 is characterized in that, comprising:
Forwards do the impulse member of linearity action in order to impact above-mentioned tool bit;
The middleware that the impulsive force of above-mentioned impulse member is transmitted to above-mentioned tool bit;
The 1st is subjected to portion, and when above-mentioned impulse member surpassed the predetermined impact position and continues that forwards move the position in order to impact above-mentioned middleware, the 1st was subjected to portion and this impulse member butt;
The 2nd is subjected to portion, when above-mentioned middleware be subjected to surpassing above-mentioned impact position forwards the above-mentioned impulse member that moves of position impact and when forwards mobile, the 2nd is subjected to portion and this middleware butt;
The 1st elastomer and the above-mentioned the 1st is subjected to portion's butt, and can produce strain because of the impact that above-mentioned impulse member and the 1st is transmitted by the butt of portion to come; And
The 2nd elastomer, limit moving forwards by above-mentioned tool body or by this tool body restriction tool body side component that moves forwards, and with the above-mentioned the 1st be subjected to portion and above-mentioned the 2nd portion of being subjected to butt respectively, the 2nd elastomer is subjected to impact that portion's butt produces and the above-mentioned middleware and the above-mentioned the 2nd impact that produced by portion's butt of transmitting from above-mentioned the 2nd portion of being subjected to owing to being subjected to transmitting the above-mentioned impulse member and the 1st that comes from above-mentioned the 1st portion of being subjected to, and the generation strain
The above-mentioned the 1st is subjected to portion and the 2nd to be subjected to portion with respect to above-mentioned the 2nd elastomer butt arranged side by side.
7. percussion tool, the hammering operation that the percussion action of the long axis direction by tool bit is stipulated work piece is characterized in that, comprising:
Tool body;
Forwards do the impulse member of linearity action in order to impact above-mentioned tool bit;
The middleware that the impulsive force of above-mentioned impulse member is transmitted to above-mentioned tool bit;
The 1st is subjected to portion, and when above-mentioned impulse member surpassed the predetermined impact position and continues that forwards move the position in order to impact above-mentioned middleware, the 1st was subjected to portion and this impulse member butt;
The 2nd is subjected to portion, when above-mentioned middleware be subjected to surpassing above-mentioned impact position forwards the above-mentioned impulse member that moves of position impact and when forwards mobile, the 2nd is subjected to portion and this middleware butt;
The 1st elastomer and the above-mentioned the 1st is subjected to portion's butt, and can produce strain because of the impact that above-mentioned impulse member and the 1st is transmitted by the butt of portion to come; And
The 2nd elastomer, limit moving forwards by above-mentioned tool body or by this tool body restriction tool body side component that moves forwards, and with the above-mentioned the 1st be subjected to portion and above-mentioned the 2nd portion of being subjected to butt respectively, the 2nd elastomer is owing to being subjected to transmitting that the above-mentioned impulse member and the 1st that comes is subjected to impact that portion's butt produces and from the above-mentioned middleware and the above-mentioned the 2nd impact that produced by portion's butt of above-mentioned the 2nd portion of being subjected to transmission from above-mentioned the 1st portion of being subjected to, and the generation strain
The above-mentioned the 1st is subjected to portion and the 2nd to be subjected to portion with respect to above-mentioned the 2nd elastomer butt arranged side by side.
8. percussion tool according to claim 7 is characterized in that,
The above-mentioned the 1st is subjected to portion and the 2nd to be subjected to any one party of portion, with the above-mentioned the 2nd elastomeric outside diameter butt, and the opposing party and the above-mentioned the 2nd elastomeric internal side diameter butt.
9. percussion tool according to claim 8 is characterized in that,
The above-mentioned the 1st portion that is subjected to is made of the ladder parts that have forwards outstanding protuberance in the outside, and via this protuberance and the above-mentioned the 2nd elastomeric outside diameter butt.
10. percussion tool according to claim 9 is characterized in that,
Above-mentioned ladder parts with protuberance are configured in front side and rear side respectively in clamping the above-mentioned the 1st elastomeric mode, and the ladder parts of front side and the ladder parts of rear side form same shape, and with above-mentioned the 1st elastomer of clamping oppositely and be configured.
11. percussion tool according to claim 7 is characterized in that,
Have working cylinder, accommodate above-mentioned impulse member, it is along the rear end face and the above-mentioned tool body butt of tool bit long axis direction, and the place ahead end face and the above-mentioned the 1st is subjected to portion's butt,
The the above-mentioned the 1st and the 2nd elastomer assembles with the state that adds ordinance load in advance respectively, thereby above-mentioned working cylinder is fixed in the tool bit long axis direction.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008074673A JP5072677B2 (en) | 2008-03-21 | 2008-03-21 | Impact tool |
| JP2008074632A JP5103234B2 (en) | 2008-03-21 | 2008-03-21 | Impact tool |
| JP2008-074673 | 2008-03-21 | ||
| JP2008-074632 | 2008-03-21 | ||
| JP2008074632 | 2008-03-21 | ||
| JP2008074673 | 2008-03-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101537610A true CN101537610A (en) | 2009-09-23 |
| CN101537610B CN101537610B (en) | 2011-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101294675A Active CN101537610B (en) | 2008-03-21 | 2009-03-20 | Impact tool |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5103234B2 (en) |
| CN (1) | CN101537610B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103328159A (en) * | 2011-01-10 | 2013-09-25 | 博世电动工具（中国）有限公司 | Impact tool |
| CN103386669A (en) * | 2012-05-07 | 2013-11-13 | 苏州宝时得电动工具有限公司 | Electric hammer |
| CN104519813A (en) * | 2010-12-29 | 2015-04-15 | 澳擞技术有限责任公司 | Electric motor driven tool for orthopedic impacting |
| CN106895131A (en) * | 2015-12-21 | 2017-06-27 | 博世电动工具（中国）有限公司 | Sealing ventilation device and the equipment including it |
| CN108068066A (en) * | 2016-11-16 | 2018-05-25 | 苏州宝时得电动工具有限公司 | Converting chuck, the tool body being used cooperatively with it and with the use of method |
| CN111745187A (en) * | 2019-03-26 | 2020-10-09 | 株式会社牧田 | Dust suction system of power tool |
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Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3794178B2 (en) * | 1998-10-23 | 2006-07-05 | 日立工機株式会社 | Impact tool |
| JP4438638B2 (en) * | 2005-02-01 | 2010-03-24 | 日立工機株式会社 | Impact tool |
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2008
- 2008-03-21 JP JP2008074632A patent/JP5103234B2/en active Active
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2009
- 2009-03-20 CN CN2009101294675A patent/CN101537610B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104519813A (en) * | 2010-12-29 | 2015-04-15 | 澳擞技术有限责任公司 | Electric motor driven tool for orthopedic impacting |
| CN103328159A (en) * | 2011-01-10 | 2013-09-25 | 博世电动工具（中国）有限公司 | Impact tool |
| CN103328159B (en) * | 2011-01-10 | 2015-12-16 | 博世电动工具（中国）有限公司 | Percussion tool |
| CN103386669A (en) * | 2012-05-07 | 2013-11-13 | 苏州宝时得电动工具有限公司 | Electric hammer |
| CN103386669B (en) * | 2012-05-07 | 2016-03-16 | 苏州宝时得电动工具有限公司 | Electric hammer |
| CN106895131A (en) * | 2015-12-21 | 2017-06-27 | 博世电动工具（中国）有限公司 | Sealing ventilation device and the equipment including it |
| CN106895131B (en) * | 2015-12-21 | 2024-01-23 | 博世电动工具（中国）有限公司 | Sealing ventilation device and equipment comprising same |
| CN108068066A (en) * | 2016-11-16 | 2018-05-25 | 苏州宝时得电动工具有限公司 | Converting chuck, the tool body being used cooperatively with it and with the use of method |
| CN108068066B (en) * | 2016-11-16 | 2023-09-12 | 苏州宝时得电动工具有限公司 | Conversion chuck, tool main body matched with conversion chuck for use and matched use method |
| CN111745187A (en) * | 2019-03-26 | 2020-10-09 | 株式会社牧田 | Dust suction system of power tool |
| CN112829824A (en) * | 2019-11-25 | 2021-05-25 | 操纵技术Ip控股公司 | Electric power steering polymer drive pulley |
| CN112643614A (en) * | 2020-11-16 | 2021-04-13 | 柳金花 | Hand-held multifunctional electric hammer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101537610B (en) | 2011-06-15 |
| JP2009226536A (en) | 2009-10-08 |
| JP5103234B2 (en) | 2012-12-19 |
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