CN102596512A - Machine tool and method for cooling a machine tool - Google Patents
Machine tool and method for cooling a machine tool Download PDFInfo
- Publication number
- CN102596512A CN102596512A CN2010800472765A CN201080047276A CN102596512A CN 102596512 A CN102596512 A CN 102596512A CN 2010800472765 A CN2010800472765 A CN 2010800472765A CN 201080047276 A CN201080047276 A CN 201080047276A CN 102596512 A CN102596512 A CN 102596512A
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- CN
- China
- Prior art keywords
- housing
- toolroom machine
- radiator
- rotatable
- motion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/008—Cooling means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
- Drilling And Boring (AREA)
Abstract
The invention relates to a machine tool having a housing (12) and a tool holder (14) movably arranged on the housing (12) for receiving an inserted tool (16). The machine tool according to the invention furthermore has a drive device (22) in the housing (12) comprising a drive unit (18, 48, 50) and a transmission unit (20) for driving the inserted tool (16), which generates waste heat during operation. According to the invention, the transmission unit (16) comprises at least one cooling body (88).
Description
Technical field
The present invention relates to a kind of toolroom machine, especially hand held power machine of the type according to claim 1.
Background technology
It is known having housing, being arranged in that being used on the housing receive the cutter holder of plug-in type cutter and be received in the toolroom machine that being used in the housing drive the drive unit of cutter movingly.Can produce used heat the in service of the drive unit with driver element and gear unit.Especially in known hammer drill and/or jump bit, when operation, can produce a large amount of loss heat and/or used heat.In this front area that is provided with many thermals source, produce extra high heat and produce high temperature thus at hand held power machine.Thermal source for example is from the heat of compression of the air cushion of the beater mechanism of hammer drill and/or jump bit, from the frictional dissipation of other moving component of the impact loss of the appearance of the impact process between the element of beater mechanism, the possible friction loss that is produced by the relative motion between the element of beater mechanism in beater mechanism inside and/or hammer drill and/or jump bit.In order to limit the thermal force that is positioned at inner member, loss heat must outwards derive from enclosure interior on enough degree.Conduct heat mainly to conduct at this and realize through heat.In the example of known hammer drill and/or jump bit, derive at two supporting positions of the hammer pipe that the major part of the heat that in beater mechanism, produces must be through belonging to beater mechanism.But depend on form of implementation, the supporting position only has little binding face or contact-making surface, to such an extent as to heat-transfer area and conductible thus heat are considerably less.Thus in the form of implementation of known hammer drill and/or jump bit, the thermal force of beater mechanism member that is positioned at housing is high especially.
The loss heat that arrives the outer surface of beater mechanism is discharged in the surrounding environment through convection current on main degree.The required air mass flow of convection current produces through a blower fan that is connected with driver element at this usually.For the front area of air mass flow is led hammer drill and/or jump bit and the contact temperature of protecting the user to avoid being harmful to, a beater mechanism housing that surrounds beater mechanism is surrounded by additional plastic casing usually.But, externally also only there is inadequate heat transmission at this position because the hottest part of beater mechanism housing often is positioned at the end of heat radiation chain.
For example known in addition by DE102004058696A1, through so-called Venturi nozzle effect air is sent in the front area effectively.This hammer drill that needs relative complex that is utilized in of this effect is constructed.
Summary of the invention
Have independent claims characteristic have following advantage by toolroom machine of the present invention, especially hand held power machine: gear unit comprises at least one radiator.Advantageously reach following result through this heat radiation physical efficiency, the used heat that promptly in gear unit, occurs can be discharged by peripherad especially effectively air mass flow.
Obtain favourable expansion and improvement through the measure of enumerating in the dependent claims to the characteristic that in independent claims, provides.
The form of implementation of effectively also saving structure space simultaneously can realize in the following manner: gear unit comprises the axle of a rotatable at least motion, and it is surrounded by radiator at least in part.Particularly advantageous at this is that the axle of rotatable motion is bearing in the radiator.
In a kind of especially effectively form of implementation, radiator surrounds the axle of said rotatable at least motion basically coaxially.
Be not connected with the axle of said rotatable at least motion if radiator rotationally, especially has at least basically with relatively rotating, so hot transmission can more effectively be carried out.In a kind of preferred especially form of implementation, radiator is constructed to back-up ring.
In order to improve the actuated element that is constructed to radiator in the efficient of discharging aspect the used heat, the actuated element that is constructed to radiator has the subregion that at least one is provided with fin.
In another favourable extend type, radiator has at least one join domain that receives heat.The join domain that receives heat especially is understood that a zone on the radiator at this, and radiator is represented especially directly to contact the object of discharging heat through contact on this zone, transmits resistance thereby form as far as possible little heat.Be in direct contact with this can be for example through shape sealed and/or force closure and/or the sealed connection of material set up.In a kind of simple especially form of implementation, contact was constructed to win and cooperated.Conversion ground or additional ground in another kind of form of implementation, advantageously use conduction material, for example heat-conducting cream in join domain.
In a kind of preferred implementing form of toolroom machine, at least some parts of gear unit are set in the gear mechanism housing, and this gear mechanism housing is received in the housing.Preferably, gear mechanism housing is processed by metal material, especially steel at this.
In a kind of particularly advantageous form of implementation, gear mechanism housing has at least one surface texture ventilative on the face direction at least from the teeth outwards.The face direction is interpreted as the bearing of trend on surface especially at this.Ventilative surface texture is interpreted as a structure especially at this, as far as possible little to the gas acting in opposition of meeting stream towards structure, the preferred resistance that almost disappears of this structure.The gas of meeting stream is at this air preferably.In a kind of simple especially form of implementation, surface texture can be constructed at least one overflow launder at this.
In order to discharge used heat especially effectively, at least one air is set in housing gets into opening, cooling air stream can get into opening through air and flow in the housing to discharge at least a portion of used heat.In addition, in this transitional region between cutter holder and housing, be provided with at least one air outlet opening, at least one fraction of cooling air stream can be discharged through the air outlet opening.
For fear of the accidental injury that the dust through invasion causes, the actuated element that is configured to radiator is furnished with a sealing position to the dust sealing at least.This sealing position to the dust sealing at least to the full extent, preferably almost entirely stops gear unit directly to contact with cooling air stream.
In a kind of preferred construction form, the axle of said rotatable at least motion is the working-spindle of a rotatable at least motion, especially hammer pipe.In a kind of preferred especially form of implementation, be hand held power machine, especially hammer drill and/or chiso-mallet by toolroom machine of the present invention.
In yet another aspect, the present invention relates to a kind of method that is used for the heat radiation of toolroom machine, especially hand held power machine, this toolroom machine has one and is received in drive unit in the housing, that have driver element and gear unit.In service at drive unit produces used heat at this, and wherein, the cooling circulation of air is crossed at least one air inlet opening that is arranged on the housing and flowed in the housing to discharge at least a portion of preheating.At least a portion of suggestion cooling air stream flows through the radiator on the axle of the rotatable motion that is arranged on gear unit.
Description of drawings
Shown in the drawings and the elaboration at length in following specification of embodiments of the invention.Accompanying drawing illustrates:
The diagrammatic side view of Fig. 1 hammer drill and/or jump bit,
The hammer drill of Fig. 2 Fig. 1 have a partial sectional view by the front area of bearings of the present invention.
The specific embodiment
Fig. 1 illustrates the example of the sketch map of a hammer drill and/or chiso-mallet 10 as toolroom machine; It comprises that a housing 12, one are arranged on cutter holder 14 and drive unit 22 with driver element 18 and gear unit 20 that is received in the housing 12 that being used on the housing 12 receives plug-in type cutter 16 movingly, and this drive unit is used to drive plug-in type cutter 16.Cutter holder 14 this preferably can be rotatably set in housing 12 distolateral 24 on.In example according to Fig. 1, housing 12 with distolateral 24 of housing 12 opposite sides on be provided with a handle assembly 26 in addition.This handle assembly 26 comprises a utensil main switch 28 that is used to start hammer drill and/or chiso-mallet 10 in present example.Be provided with on the housing 12 of this external hammer drill and/or chiso-mallet 10, especially adjustable ground is provided with an additional handle assembly 30.In addition the housing 12 of hammer drill and/or chiso-mallet 10 have at least one, preferred two or more a plurality of ventilation orifices 32.Depend on air- flow direction 34,36, ventilation orifice 32 gets into opening 38 or 40 effects of air outlet opening as air.But an air is set on housing 12 at least gets into opening 38.
Between housing 12 and the cutter holder 14, especially in the transitional region 42 between the outer race 44 of housing 12 and cutter holder 14 an additional air outlet opening 46 is set.
In present example, driver element 18 comprises a motor 48, especially motor 50 and a unshowned motor drive shaft here.Motor 48,50 is connected with gear unit 20 effects through motor drive shaft.
The hammer drill of here describing and/or the gear unit 20 of chiso-mallet 10 have a rotation drive transmission and/or one with known form and have the beater mechanism that impacts drive transmission.In known hammer drill and/or chiso-mallet 10, beater mechanism often is configured to a so-called air cushion beater mechanism or air spring beater mechanism.The beginning explanation, the air cushion beater mechanism produces contribution to the used heat of the drive unit 22 of hammer drill and/or chiso-mallet 10 in several ways as.
Fig. 2 illustrates the front area of hammer drill and/or chiso-mallet 10 with broken section.
The gear unit 20 of hammer drill and/or chiso-mallet 10 has a working-spindle 60, preferred hammer is managed 61 examples as the axle 59 that rotatablely moves.Tool fitting 52 for example is inserted in the opened end portions 62 of working-spindle 60,61 and preferably relatively rotates with working-spindle 60,61 nothings and can not be connected with moving axially at this.In the example according to Fig. 2, tool fitting 52 is connected with working-spindle 60,61 through the locking body 64 that is coupled in the tool fitting 52 and pass working-spindle 60,61.
Working-spindle 60,61 is received in the gear mechanism housing 68 through a sliding bearing 66 and rotatably supported with respect to this gear mechanism housing at this.Gear mechanism housing 68 at this outwards by housing 12, especially hammer shroud 70 gauges and besieged at least in part into shape.Gear mechanism housing 68 at this especially by metal material, preferably made of steel.Hammer shroud 70 and housing 12 the same preferred being made of plastics.In addition, between working-spindle 60,61 and gear mechanism housing 68, also be provided with a felt collar 72 and a radial axle sealing ring 74, gear mechanism housing 68 sealed with respect to the dust of invasion through them.
In addition, in tool fitting 52 and working-spindle 60, transitional region between 61, be provided with one and impact bolt 76.Impact bolt 76 and have one or more earrings 78, make of the dust sealing of the inner space 80 of working-spindle 60,61 with respect to invasion through them at this.
In general, at the structure of hammer drill shown in Fig. 1 and 2 and/or chiso-mallet 10 corresponding to the complete known serial scheme that is used for hammer drill and/or chiso-mallet.Most of used heat inner at percussion mechanism, that especially in working-spindle and cutter holder, produce must discharge gear mechanism housing 68 through sliding bearing 66 long and narrow, that have the gap by the heat conduction.In fact working-spindle 60,61 can not discharge used heat through effective convection heat transfer' heat-transfer by convection because working-spindle 60,61 in fact with member thermal isolation on every side.Identical content also is applicable to the cutter holder 14 of thermal coupling certainly with similarity relation.
In the hammer drill and/or chiso-mallet 10 implemented by the present invention according to Fig. 2, gear mechanism housing 68 has at least one overflow launder 82.Overflow launder 82 extends on this surface 69 along a face direction 71 along gear mechanism housing 68.At this, the face direction especially is understood that such direction, and this direction is parallel to surface 69 extensions and especially in the local coordinate system on surface 69, on a direction in space, follows the tracks of should the surface trend.Overflow launder 82 is arranged in gear mechanism housing 68 with respect to the hammer shroud 70 that bores hammer 10 supporting zone of housing 12 in other words.Task at this overflow launder 82 is that air mass flow 84 is flowed towards the direction of cutter holder 14.Except the overflow launder shown in this 82, known in addition other the ventilative surface texture 83 ' of professional, it can be used in the heat loss through convection that causes impact mechanism by the present invention.For example can adopt surface voids and/or network by invention.Can stipulate alternatively or additionally that also a corresponding ventilative surface texture 83 ' is arranged on the inner face of housing 12 in supporting zone.
At radially outer a radiator 88 is arranged on the working-spindle 60,61 in the join domain 86 between working-spindle 60,61 and tool fitting 52, preferred nothing is connected with working-spindle 60,61 with relatively rotating.Radiator 88 is interpreted as especially that at this has a big heat conduction-and/or heat-exchange surface and/or to the element of stream interface and/or little heat exchange resistance.Radiator 88 is implemented as a member that mainly is form of sleeve in the form of implementation according to Fig. 2.Radiator 88 is sealed and/or force closure ground extension on join domain 86 in this preferable shape.Therefore radiator 88 does not especially have in current example with relatively rotating and is connected with working-spindle 60,61.Except radiator 88 being connected of and/or force closure sealed with the shape of working-spindle 60,61, the invention of other interconnection technique use by to(for) the technical staff alternatively known or additionally.Connect as the interconnection technique that substitutes or replenish through the material of soldering or melting welding is sealed so for example can adopt.Also can in join domain 86, add and help from heat conducting material, the especially heat-conducting cream of working-spindle 60,61 to radiator 88 heat transfers.
In a kind of preferred form of implementation, as it be shown in fig. 2, radiator 88 also has a sealing labyrinth 90 that constitutes with gear mechanism housing 68.Sealing labyrinth 90 be used herein to improve drive unit housing 68 with respect to invade, for example from the dust sealing of the air that contains dust of air mass flow 84.
Radiator 88 preferably has one or preferred especially a plurality of fin 92 that extend in the air mass flow 84.Air mass flow 84 flows through overflow launder 82 and fin 92.Air mass flow 84 is discharged in the surrounding environment through the additional air outlet opening 46 that is arranged in the transitional region 42 then.The used heat that in the front area that bores hammer 10, generates especially can be discharged in the air mass flow 84 through the fin 92 of radiator 88 effectively.
In addition, radiator 88 can have supplementary features, can represent additional function through supplementary features.A sealing labyrinth 94 for example can be set thus, and the inner space 96 of cutter holder 14 is protected from the dust of intrusion through the sealing labyrinth.Radiator 88 also can be as the carrier of potted component 98 in addition.
In the form of implementation according to Fig. 2, radiator 88 is provided with and is constructed to especially back-up ring 100 coaxially around working-spindle 60,61.This has advantage, promptly strengthens the sealing function and the radiating effect of radiator 88,100 through rotatablely moving of working-spindle 60,61.
According to the concrete form of implementation of toolroom machine, characteristic and the function that the professional is based on radiator 88 described herein be according to requiring adaptive radiator accordingly, and do not change inventing important advantage and effect at this.
Claims (14)
1. toolroom machine; It comprises a housing (12), a cutter holder that is used for receiving plug-in type cutter (16) (14) and the drive unit (22) with driver element (18,48,50) and gear unit (20) that is received in housing (12) that is arranged on movingly on the housing (12); This drive unit is used to drive plug-in type cutter (16); This drive unit generation used heat that is in operation is characterized in that said gear unit (16) comprises at least one radiator (88).
2. according to the toolroom machine of claim 1, it is characterized in that said gear unit (20) comprises the axle (59) of a rotatable at least motion, the axle of said rotatable at least motion is surrounded by said radiator (88) at least in part.
3. according to the toolroom machine of claim 2, it is characterized in that said radiator (88) surrounds the axle (59) of said rotatable at least motion basically coaxially.
4. according to the toolroom machine of claim 2 or 3, it is characterized in that said radiator (88) has basically no at least and relatively rotates ground, preferred nothing is connected with the axle (59) of said rotatable at least motion with relatively rotating.
5. according at least one toolroom machine in the claim 2 to 4, it is characterized in that said radiator (88) is constructed to back-up ring (100).
6. according at least one toolroom machine in the above claim, it is characterized in that said radiator (88) has the subregion that at least one is provided with fin (92).
7. according at least one toolroom machine in the above claim, it is characterized in that said radiator (88) has at least one join domain (86) that receives heat.
8. according at least one toolroom machine in the above claim, it is characterized in that at least some parts of said gear unit (20) are arranged in the gear mechanism housing (68), this gear mechanism housing is received in the said housing (12).
9. according to Claim 8 toolroom machine is characterized in that, said gear mechanism housing (68) has at least one at least and goes up ventilative surface texture (83), preferred at least one overflow launder (82) on face direction (71) in face direction (71) on surface (69).
10. according at least one toolroom machine in the above claim; It is characterized in that; In said housing (12), be provided with at least one air and get into opening (38); Cooling air stream can get into opening through said air and flow in the said housing (12) taking away at least a portion of said used heat, and is provided with in the transitional region (42) between said cutter holder (14) and said housing (12) and is used to discharge a fraction of at least at least one air outlet opening (46) that the cooling air flows.
11. according at least one toolroom machine in the above claim; It is characterized in that; Said radiator (88) is furnished with a sealing position (90 to the dust sealing at least; 94), to the full extent, preferably almost entirely stop said gear unit (20) directly to contact with cooling air stream through said sealing position.
12., it is characterized in that the axle of said rotatable at least motion (59) is the working-spindle (60) of a rotatable at least motion, especially hammer pipe (61) according at least one toolroom machine in the claim 2 to 11.
13., it is characterized in that said toolroom machine is hand held power machine, especially hammer drill and/or chiso-mallet (10) according at least one toolroom machine in the above claim.
14. be used for the method for the heat radiation of toolroom machine, especially hand held power machine; Said toolroom machine has one and is received in drive unit (22) in the housing (12), that have driver element (18) and gear unit (20); The said drive unit generation used heat that is in operation; Wherein, The cooling circulation of air is crossed at least one and is arranged on air in the housing (12) and gets into opening (38) and flow in the said housing (12) to take away at least a portion of said used heat, it is characterized in that, at least a portion of said cooling air stream flows through the radiator (88) on the axle (59) of a rotatable at least motion that is arranged on said gear unit (20).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200910045799 DE102009045799A1 (en) | 2009-10-19 | 2009-10-19 | Machine tool and method for cooling a machine tool |
| DE102009045799.2 | 2009-10-19 | ||
| PCT/EP2010/064882 WO2011047959A1 (en) | 2009-10-19 | 2010-10-06 | Machine tool and method for cooling a machine tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102596512A true CN102596512A (en) | 2012-07-18 |
| CN102596512B CN102596512B (en) | 2015-08-19 |
Family
ID=43371529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201080047276.5A Expired - Fee Related CN102596512B (en) | 2009-10-19 | 2010-10-06 | The method of toolroom machine and the heat radiation for toolroom machine |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2490862A1 (en) |
| CN (1) | CN102596512B (en) |
| DE (1) | DE102009045799A1 (en) |
| WO (1) | WO2011047959A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107206585A (en) * | 2015-01-30 | 2017-09-26 | 日立工机株式会社 | Working rig |
| CN104942763B (en) * | 2014-03-24 | 2019-06-21 | 株式会社牧田 | Percussion tool |
| CN113840705A (en) * | 2019-07-11 | 2021-12-24 | 喜利得股份公司 | Dust cap with vibration decoupling |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013204985A1 (en) * | 2013-03-21 | 2014-10-09 | Robert Bosch Gmbh | Hand tool |
| DE102017211007A1 (en) * | 2017-06-29 | 2019-01-03 | Robert Bosch Gmbh | Hand tool |
| US12017336B2 (en) | 2019-06-24 | 2024-06-25 | Milwaukee Electric Tool Corporation | Power tools with high-emissivity heat sinks |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1171321A (en) * | 1996-06-29 | 1998-01-28 | 罗伯特-博希股份公司 | Hand electric toolroom machine |
| DE19913833A1 (en) * | 1998-03-27 | 1999-10-07 | Bender Gmbh & Co Kg Dr | Rotary drive system e.g. for boring, drilling and cutting machine sets, lathes, fans etc |
| EP1302281A1 (en) * | 2001-10-15 | 2003-04-16 | HILTI Aktiengesellschaft | Cooling air duct in an electric percussive tool |
| WO2006010675A1 (en) * | 2004-07-28 | 2006-02-02 | Robert Bosch Gmbh | Spacer flange for a machine tool |
| CN1792562A (en) * | 2004-12-23 | 2006-06-28 | 百得有限公司 | Cooling mechanism for a power tool |
| EP1970162A1 (en) * | 2007-03-15 | 2008-09-17 | Festool GmbH | Manually operated machine tool with a cooling element |
| CN101489707A (en) * | 2006-07-07 | 2009-07-22 | 罗伯特·博世有限公司 | Handheld tool, in particular a handheld saw |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004055268A1 (en) * | 2004-11-17 | 2006-05-18 | Robert Bosch Gmbh | Hand tool |
| DE102004058696A1 (en) | 2004-12-06 | 2006-06-08 | Hilti Ag | Electric power tool |
| EP1674213B1 (en) * | 2004-12-23 | 2008-10-01 | BLACK & DECKER INC. | Power tool cooling |
-
2009
- 2009-10-19 DE DE200910045799 patent/DE102009045799A1/en not_active Withdrawn
-
2010
- 2010-10-06 EP EP10767978A patent/EP2490862A1/en not_active Withdrawn
- 2010-10-06 WO PCT/EP2010/064882 patent/WO2011047959A1/en active Application Filing
- 2010-10-06 CN CN201080047276.5A patent/CN102596512B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1171321A (en) * | 1996-06-29 | 1998-01-28 | 罗伯特-博希股份公司 | Hand electric toolroom machine |
| DE19913833A1 (en) * | 1998-03-27 | 1999-10-07 | Bender Gmbh & Co Kg Dr | Rotary drive system e.g. for boring, drilling and cutting machine sets, lathes, fans etc |
| EP1302281A1 (en) * | 2001-10-15 | 2003-04-16 | HILTI Aktiengesellschaft | Cooling air duct in an electric percussive tool |
| WO2006010675A1 (en) * | 2004-07-28 | 2006-02-02 | Robert Bosch Gmbh | Spacer flange for a machine tool |
| CN1792562A (en) * | 2004-12-23 | 2006-06-28 | 百得有限公司 | Cooling mechanism for a power tool |
| CN101489707A (en) * | 2006-07-07 | 2009-07-22 | 罗伯特·博世有限公司 | Handheld tool, in particular a handheld saw |
| EP1970162A1 (en) * | 2007-03-15 | 2008-09-17 | Festool GmbH | Manually operated machine tool with a cooling element |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104942763B (en) * | 2014-03-24 | 2019-06-21 | 株式会社牧田 | Percussion tool |
| CN107206585A (en) * | 2015-01-30 | 2017-09-26 | 日立工机株式会社 | Working rig |
| CN107206585B (en) * | 2015-01-30 | 2020-08-21 | 工机控股株式会社 | Working machine |
| US10836019B2 (en) | 2015-01-30 | 2020-11-17 | Koki Holdings Co., Ltd. | Work machine |
| CN113840705A (en) * | 2019-07-11 | 2021-12-24 | 喜利得股份公司 | Dust cap with vibration decoupling |
| CN113840705B (en) * | 2019-07-11 | 2023-11-28 | 喜利得股份公司 | Dust cap with vibration decoupling |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011047959A1 (en) | 2011-04-28 |
| EP2490862A1 (en) | 2012-08-29 |
| CN102596512B (en) | 2015-08-19 |
| DE102009045799A1 (en) | 2011-05-12 |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20150819 Termination date: 20171006 |