EP2523781B1 - Marteau perforateur et/ou à percussion avec refroidissement par convection libre - Google Patents

Marteau perforateur et/ou à percussion avec refroidissement par convection libre Download PDF

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Publication number
EP2523781B1
EP2523781B1 EP11700998.5A EP11700998A EP2523781B1 EP 2523781 B1 EP2523781 B1 EP 2523781B1 EP 11700998 A EP11700998 A EP 11700998A EP 2523781 B1 EP2523781 B1 EP 2523781B1
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EP
European Patent Office
Prior art keywords
gap
hood
drill
housing
percussion hammer
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.)
Active
Application number
EP11700998.5A
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German (de)
English (en)
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EP2523781A1 (fr
Inventor
Rudolf Berger
Helmut Braun
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wacker Neuson Produktion GmbH and Co KG
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Wacker Neuson Produktion GmbH and Co KG
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Publication of EP2523781A1 publication Critical patent/EP2523781A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/20—Devices for cleaning or cooling tool or work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/06—Means for driving the impulse member
    • B25D9/10—Means for driving the impulse member comprising a built-in internal-combustion engine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D2217/0057—Details related to cleaning or cooling the tool or workpiece
    • B25D2217/0061—Details related to cleaning or cooling the tool or workpiece related to cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/121—Housing details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/245—Spatial arrangement of components of the tool relative to each other

Definitions

  • the invention relates to a drill and / or percussion hammer with an internal combustion engine according to the preamble of claim 1.
  • a drill and / or percussion hammer is from the CH 110 334 A known.
  • Drilling and / or impact hammers with an internal combustion engine - hereinafter also referred to as a hammer for short - are known in particular as relatively heavy hammers, in which work is carried out essentially vertically downwards.
  • a striking mechanism in particular an air spring impact mechanism, which can be driven by a tool, e.g. acting on a chisel.
  • a driven via the crankshaft of the engine cooling air blower for cooling the engine is provided.
  • the cooling air blower generates a cooling air flow, which is guided along the outside of the motor housing, that is, the cylinder of the internal combustion engine, in particular on the provided on the outside of the cylinder cooling fins along.
  • the cooler parts in operation include, in particular, the tank, the fuel-carrying parts and also the carburettor. These components heat up shutdown, which increases the tendency to vaporize the fuel. Starting the engine when the appliance is hot and after only a brief interruption of work can be made difficult, which at least limits the ease of use for the operator.
  • a striking tool is described with an internal combustion engine.
  • a flywheel has scoop-like spokes, with which a forced cooling air flow is generated. The cooling air flow is drawn through grooves under a sleeve to cool the engine.
  • the invention has for its object to provide a drill and / or percussion hammer, in which an undesirable strong heating of the operation of the hammer relatively cool components after switching off the hammer is avoided or at least reduced.
  • a drilling and / or percussion hammer has an internal combustion engine with a motor housing, a percussion drivable by the internal combustion engine with a striking mechanism housing, a gearbox operatively arranged between the internal combustion engine and the impact mechanism with a transmission housing and a in a region surrounding at least a portion of the motor housing, the gear housing and / or the percussion gear housing hood.
  • the hood has in the area to the part that surrounds, a distance such that a gap between the part in question and the hood is present.
  • the gap is, based on a main working direction of the hammer and / or percussion hammer, open at its bottom to the environment.
  • the hood has on its upper side an opening, wherein the gap and the opening communicate with each other and form a cooling air passage, such that ambient air can flow in as cooling air over the underside of the gap and can flow out through the opening again.
  • the hood in cooperation with the components that surrounds it, that is, a part of the motor housing, the gear housing and / or the striking mechanism housing forms a cooling air duct.
  • the cooling air duct has in particular an inlet on the underside of the hood or on the downwardly open gap, as well as the gap formed between the hood and the component surrounded by the latter itself and finally serving as an outlet opening at the top of the hood.
  • the air in the cooling air channel also becomes ie heated in the gap.
  • the heating of the air causes the air to rise and finally exit through the opening at the top of the hood.
  • cool ambient air flows in via the inlet at the bottom of the hood and cools the heated components.
  • the flow of cooling air causes a transfer of heat from the hot components to cooler, outside the hood arranged components is prevented.
  • the cooler components are additionally cooled in this way, or at least protected against stronger heat.
  • the cooling air flow generated solely by the heating of the air in the gap causes cooling by free convection, without a cooling air blower must be provided. This has the advantage that the hammer is cooled even when the internal combustion engine and the standard provided with him cooling air blower are not in operation. The cooling by the cooling air flow in the gap is also effective in the resting phase of the hammer, with the engine off.
  • the various housings namely motor housing, gear housing and percussion gear housing, need not be formed separately or distinguishable. It is easily possible, e.g. to integrate the gearbox into the engine or drums. In this respect, the same housing components can simultaneously serve functionally as a housing for several sub-components of the hammer.
  • the hood can surround the area to be cooled like a tent.
  • the hood can be slipped over the components to be cooled from above.
  • the opening provided at the top of the hood may be formed at the end of a chimney extending substantially vertically upwards relative to the main working position of the hammer, the gap opening into the chimney.
  • the chimney is thus provided at the end of the cooling air duct, between the gap and the opening, and enhances the flow effect in the cooling air duct or in the gap through the heated air rising in the chimney.
  • the fireplace can be designed as part of the hood. In particular, it is possible to manufacture the fireplace in one piece with the hood.
  • the gap may extend obliquely to a horizontal above the motor housing, the gear housing and / or the striking mechanism housing at least in a partial area.
  • the gap in the area above the each housing should have not only a horizontal but also a vertical extension direction, wherein the gap should increase at least slightly vertically in this area of its substantially horizontal extension direction.
  • the increase should take place in particular in the direction of the opening of the hood or in the direction of the chimney. This can be effected by the convection flow in the area above the housing, a flow effect by the rising, heated air.
  • the warm air has through the at least slightly vertically rising gap the ability to continue to flow upwards until it is finally discharged through the fireplace and the opening to the environment. With this design, a jam of the heated cooling air is avoided above the housings.
  • the gap above the housings in the flow direction of the cooling air can extend at least slightly upward in the vertical direction. Only a horizontal course of the gap should be avoided in order to avoid the mentioned congestion of heated cooling air. In principle, however, also - at least shorter - horizontal areas of the gap are possible.
  • the gap can also be designed such that it extends obliquely rising to the opening at least in some sections even in a lying position corresponding to a rest position of the drilling and / or percussion hammer.
  • the rest position corresponds, for example, to a position rotated by 90 degrees relative to the main work position or operating position. Due to the particular embodiment given here, it is possible for the gap to also have partial sections in the intended rest position, which always extend in an ascending manner towards the opening. In this way, a cooling air flow can be achieved by heated cooling air in the rest position, which extends in the gap up to the opening. It is not necessary that the gap increases obliquely or vertically over its entire course. Rather, it will be appreciated that, in particular, the sections of the gap which, as indicated above, also extend at least slightly in the vertical direction in the case of a substantially horizontal course, likewise rise obliquely upward in the lying rest position.
  • the gap may be formed such that it extends obliquely upward above the housings from a region of the drilling and / or percussion hammer opposite the motor housing relative to the transmission housing up to the opening of the hood.
  • the transmission housing is then arranged between the motor housing and the opposite region.
  • the internal combustion engine is usually arranged on the side facing away from the operator of the hammer, so that the operator stands even with respect to the interposed gear housing in front of the motor housing opposite area. From this area, the gap should extend diagonally up to the opening of the hood or to the chimney. In this case, the gap in particular also runs away from the operator, so that the air heated in the gap is not guided onto the operator.
  • components may be arranged that are temperature sensitive. These include in particular a fuel tank or other fuel-carrying components, such as e.g. a fuel tap, a portion of a fuel hose or a fuel filter.
  • a fuel tank or other fuel-carrying components such as e.g. a fuel tap, a portion of a fuel hose or a fuel filter.
  • conventional hammers have the problem that the hot device may lead to vaporization of fuel in the fuel system. The resulting vapor bubbles make it difficult to restart the hammer considerably.
  • the components are located outside of the hood, they are also outside the heated areas of the hammer.
  • the cooling air channel provided between the hot components (in particular the various housings or partial housings) and the fuel-carrying elements and the air flow acting therein cause effective cooling, so that the components arranged outside the hood hardly heat up.
  • the tank may be annular or U-shaped around the chimney flue. This allows a space-saving arrangement of the tank on the one hand and on the other hand the largest possible effective length of the chimney, which improves the cooling air flow in the gap.
  • the hammer also has a per se known, can be driven by the internal combustion engine cooling air blower, for generating a cooling air flow, with the at least the cylinder of the engine, but also other components, such as the exhaust system or percussion can be cooled.
  • the cooling air blower effects a forced convection flow of the cooling air which enables effective cooling during operation of the hammer.
  • the second cooling air flow which is achieved by free convection, is designed so that the temperature level is low enough to thermally decouple the tank during operation and the fuel-carrying components from the hot device or to cool.
  • the tendency for vapor bubble formation in the fuel system is reduced during operation and thus improves the reliability of the fuel system.
  • the hood is movable relative to the other components of the hammer, in particular to the motor housing, the gear housing and the striking mechanism housing.
  • This mobility causes a vibration decoupling, so that the hood, at the e.g. the handles may be intended for the operator, not fully absorb the vibrations arising in the impact mechanism, in the engine and in the transmission. This relieves the operator of holding the hammer.
  • the hood can be sprung relative to the other components of the hammer to improve the vibration isolation.
  • the cross section of the gap between the hood and the part enclosed by it can be variable during the relative movement of the hood to the part at least in partial regions of the gap. In this way, a pulsation can be effected by the hood springing effecting, in addition to the convection air flow described above, yet another air flow due to a pumping effect superimposed on the convective flow.
  • the pumping effect is caused by the compression of the hood or by the oscillating relative movement of the hood to the rest of the hammer.
  • the chimney can taper conically upwards and be designed in such a way that the air can flow upwards due to the large, conical cross section when the hood is deflected, but no longer against the convection flow is pushed back.
  • the large volume of the chimney has a uniform effect on the pulsating flow, so that the described convection flow can form.
  • FIGS. 1 and 2 show in various views a schematic example of a drill and / or percussion hammer according to the invention.
  • the hammer has an internal combustion engine 1, which drives a percussion mechanism 5 via a first crank mechanism 2, a transmission 3 and a second crank mechanism 4.
  • the striking mechanism 5 in turn acts upon a tool 6, in the present example a chisel.
  • the structure of such a hammer is widely known and therefore need not be explained in detail.
  • the internal combustion engine 1 is surrounded by a motor housing 7.
  • the term "motor housing” is here summarized as a blanket term chosen.
  • the motor housing 7 may comprise a plurality of sub-housing components, e.g. a cylinder housing 7a and a crankcase 7b.
  • the crankcase 7b surrounds the first crank mechanism 2.
  • the transmission 3 is surrounded by a transmission housing 8, which also receives the second crank mechanism 4.
  • the percussion mechanism 5 is designed as a pneumatic spring impact mechanism and has a connecting rod 9 moved by the second crank mechanism 4, which reciprocates a drive piston 10 in a percussion mechanism housing 11 serving as a guide housing.
  • a percussion piston 12 is guided, which is moved via a formed between the drive piston 10 and the percussion piston 12 air spring 13 against the end of the tool 6 and returned.
  • the function of such impact mechanism 5 is known and does not need to be deepened at this point.
  • a cooling air blower 14 with a cooling air inlet 15 is arranged at the front end of the first crank mechanism 2.
  • the cooling-air blower 14 is driven in rotation by the crankshaft of the first crank mechanism 2 and in so doing draws on ambient air via the cooling-air inlet 15.
  • the cooling air is then passed through a cooling air duct 16 to the components of the hammer to be cooled.
  • the cooling air passage 16 guides the cooling air to an outer wall of the cylinder housing 7a. Thereafter, the cooling air can still be used for cooling an exhaust system 17 or the striking mechanism housing 11.
  • the impact mechanism housing 11 should be cooled, in particular in the region of the air spring 13, because high temperatures can occur there due to the air compression.
  • a guide plate 18 is provided for the guidance of the cooling air flow generated by the cooling air blower 14.
  • a hood 19 is arranged in the upper region, which surrounds at least a portion of the components to be cooled.
  • the hood 19 circumscribes a part of the motor housing 7 and a considerable part of the gear housing 8.
  • the striking mechanism housing 11 is not surrounded by the hood 19.
  • the hood 19 could also extend further downwards in order to also circumscribe at least part of the percussion mechanism housing 11.
  • the hood is arranged at a distance from the parts surrounded by it, so that a gap 20 between the hood 19 and the housing components 7, 8 is formed.
  • the gap 20 has an inlet 21 on its underside, initially extending vertically along the housing components 7, 8 and finally discharging into a chimney 22, relative to a vertical working direction of the hammer.
  • the chimney 22 terminates at an upper side of the hood 19 in the form of an opening 23.
  • the cooling air flow is maintained even when the operation of the hammer is stopped and the engine 1 is turned off.
  • the still hot engine, transmission and percussion components continue to heat the air in the gap 20, so that the cooling air flow is maintained.
  • the chimney 22 is conical, whereby the chimney effect is enhanced.
  • the chimney is located at the top of the tent-shaped hood 19 at the highest point, both when the hammer is in the vertical position intended for operation, and when the hammer is dropped, thereby assuming a horizontal position.
  • the chimney 22 may also have an upwardly inclined, extending away from the operator course.
  • transverse ribs or transverse walls may be used to stabilize the chimney 22.
  • the opening 23 may be formed in the form of a plurality of cooling slots, which are provided at the upper end of the chimney 22.
  • the inlet of the chimney 22 on its underside or at the transition between the gap 20 and the chimney 22 may be rounded and conical in order to initiate the flow of air into the chimney with as little resistance as possible.
  • This design can be particularly advantageous when the hood 19 is mounted resiliently movable relative to the other components of the hammer. Such resilient mobility is desirable to achieve a vibration isolation between the most still handles for the operator-carrying hood 19 and the rest, strong vibration hammer.
  • the chimney opening at the bottom has a length of 90 mm and a width between 40 and 60 mm. At the top, the length can be 65 mm and the width between 20 and 35 mm. The height should be at least 25 mm. A chimney height of up to 80 mm is particularly suitable. If the chimney is inclined obliquely forward with respect to the horizontal, the height at the front can e.g. 26 mm and 77 mm at the rear.
  • a tank 24 is arranged, in which the fuel is stored for the hammer.
  • other fuel-carrying components such as e.g. a fuel cock, a fuel filter, etc. may be arranged.
  • the tank 24 is arranged at a distance above the hood 19, so that a further air gap 25 between the hood 19 and the tank 24 is formed.
  • the air gap 25 provides additional heat insulation, so that the tank 24 can hardly be heated by the hot components inside the hammer.
  • a similar convection flow may result in the air gap 25, as in the gap 20.
  • the air gap 25 may be open to the environment via an inlet 26 and an outlet 27.
  • the inlet 26 and the outlet 27 may each extend as slots along the air gap 25.
  • the gap 20 extends laterally from the housings 7, 8 of the sub-components vertically. Above the housing components, in particular above the housing Transmission housing 8, the gap 20 extends obliquely rising toward the chimney 22. The oblique increase of the gap 20 is also in Fig. 2 good to see.
  • Fig. 1 thus shows the oblique course of the gap 20 above the transmission housing 8 while in Fig. 2 the oblique course of the gap 20 - corresponding to the top of the hood 19 is clearly visible.
  • the oblique course of the gap 20 above the gear housing 8 has a further advantage, as will be explained below.
  • Experience has shown that a hammer is switched off immediately after completion of work and stored as intended on the back of the hammer.
  • the back side is the internal combustion engine with respect to the transmission 3 and the striking mechanism 5 opposite side, so the right side of the hood 19 in Fig. 1 or the in Fig. 2 unrecognizable back to understand.
  • the hammer is usually held by a standing on the back of the operator in the figures, not shown handles.
  • the tank 24 surrounds the chimney 22 U-shaped, such as Fig. 2 shows. In this way, the space can be used well. It is also possible to move the chimney 22 slightly closer to the center, above the axis of the tool 6, and to arrange the tank 24 annularly around the chimney 22.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Percussive Tools And Related Accessories (AREA)

Claims (14)

  1. Marteau perforateur et/ou à percussion, comprenant :
    - un moteur à combustion (1) avec un logement de moteur (7) ;
    - un mécanisme de percussion (5) pouvant être entraîné par le moteur à combustion (1) avec un logement de mécanisme de percussion (11) ;
    - une transmission (3) agencée de façon fonctionnelle entre le moteur à combustion (1) et le mécanisme de percussion (5) avec un logement de transmission (8) ;
    - un ventilateur de refroidissement (14) pouvant être entraîné par le moteur à combustion (1) destiné à produire un flux d'air de refroidissement, au moyen duquel au moins un cylindre (7a) du moteur à combustion (1) peut être refroidi ; et comprenant :
    - un capot (19) entourant dans une zone au moins une partie du logement du moteur (7), du logement de la transmission (8) et/ou du logement du mécanisme de percussion (11) ;
    étant entendu que :
    - le capot (19) présente, dans la zone, un écart par rapport à la partie qu'il entoure de telle sorte qu'une fente (20) est formée entre la partie concernée et le capot (19) ;
    - la fente (20) est ouverte sur son côté inférieur en direction de l'environnement, par rapport à une direction de service principale du marteau perforateur et/ou à percussion ;
    - le capot (19) présente une ouverture (23) sur son côté supérieur ;
    - la fente (20) et l'ouverture (23) sont en relation de communication l'une avec l'autre et forment une conduite d'air de refroidissement de telle sorte que l'air ambiant, en tant qu'air de refroidissement, peut entrer par le côté inférieur de la fente et ressortir par l'ouverture (23) ; et étant entendu que :
    - le flux d'air de refroidissement produit par le ventilateur de refroidissement (14) et l'air de refroidissement circulant au travers de la fente forment des flux d'air de refroidissement séparés l'un de l'autre.
  2. Marteau perforateur et/ou à percussion selon la revendication 1, caractérisé en ce que le capot (19) entoure la zone à la manière d'une tente.
  3. Marteau perforateur et/ou à percussion selon la revendication 1 ou 2, caractérisé en ce que :
    - l'ouverture (23) prévue sur le côté supérieur du capot (19) est réalisée à une extrémité sous la forme d'une cheminée (22) s'étendant sensiblement verticalement ; et en ce que :
    - la fente (20) débouche dans la cheminée (22).
  4. Marteau perforateur et/ou à percussion selon la revendication 3, caractérisé en ce que la cheminée (22) fait partie du capot (19).
  5. Marteau perforateur et/ou à percussion selon l'une des revendications 1 à 4, caractérisé en ce que la fente (20) s'étend en oblique par rapport à l'horizontale au moins dans une zone partielle au-dessus du logement du moteur (7), du logement de la transmission (8) et/ou du logement du mécanisme de percussion (11).
  6. Marteau perforateur et/ou à percussion selon l'une des revendications 3 à 5, caractérisé en ce que :
    - au moins une zone de la fente (20), qui s'étend sensiblement horizontalement au-dessus du logement du moteur (7), du logement de la transmission (8) et/ou du logement du mécanisme de percussion (11), présente en plus une direction d'extension orientée dans la direction verticale ; et en ce que :
    - la fente (20) va au moins légèrement en montant y compris dans la zone de son extension sensiblement horizontale dans la direction de la cheminée (22).
  7. Marteau perforateur et/ou à percussion selon l'une des revendications 1 à 6, caractérisé en ce que la fente (20) s'étend au moins légèrement dans la direction verticale vers le haut dans la direction de circulation de l'air de refroidissement au-dessus du logement du moteur (7), du logement de la transmission (8) et/ou du logement du mécanisme de percussion (11).
  8. Marteau perforateur et/ou à percussion selon l'une des revendications 1 à 7, caractérisé en ce que la fente (20) est réalisée de telle sorte qu'elle s'étend en oblique en montant en direction de l'ouverture (23) au moins dans une section partielle, y compris dans une position horizontale du marteau perforateur et/ou à percussion correspondant à une position de repos.
  9. Marteau perforateur et/ou à percussion selon l'une des revendications 1 à 8, caractérisé en ce que la fente (20) est réalisée de telle sorte qu'elle s'étend en oblique vers le haut depuis une zone du marteau perforateur et/ou à percussion opposée au logement du moteur (7) vers l'ouverture (23) du capot (19) au-dessus du logement du moteur (7), du logement de la transmission (8) et/ou du logement du mécanisme de percussion (9), étant entendu que le logement de la transmission (8) est agencé entre le logement du moteur (7) et la zone opposée.
  10. Marteau perforateur et/ou à percussion selon l'une des revendications 1 à 9, caractérisé en ce que la fente (20) s'étend en oblique vers le haut, en particulier en s'éloignant de l'utilisateur, depuis une zone du marteau perforateur et/ou à percussion qui est la plus proche d'une position debout, dans une situation fonctionnelle, d'un opérateur actionnant le marteau vers l'ouverture (23) du capot (19) au-dessus du logement du moteur (7) et/ou du logement de la transmission (8).
  11. Marteau perforateur et/ou à percussion selon l'une des revendications 1 à 10, caractérisé en ce qu'un réservoir (24) et/ou des composants d'amenée de carburant, en particulier un robinet de carburant, une partie d'une conduite de carburant et/ou un filtre à carburant, sont agencés en dehors du capot (19).
  12. Marteau perforateur et/ou à percussion selon l'une des revendications 1 à 11, caractérisé en ce qu'une fente supplémentaire (25) est prévue entre le capot (19) d'une part et le réservoir (24) et/ou les composants d'amenée de carburant d'autre part.
  13. Marteau perforateur et/ou à percussion selon l'une des revendications 11 à 12, caractérisé en ce que le réservoir (24) est agencé dans une forme annulaire ou une forme de U autour de la cheminée (22) du capot (19).
  14. Marteau perforateur et/ou à percussion selon l'une des revendications 1 à 13, caractérisé en ce que :
    - le capot (19) est mobile par rapport à la partie qu'il entoure ; et en ce que :
    - la section transversale de la fente (20) peut être modifiée au moins dans des zones partielles de la fente (20) lorsque le capot (19) est déplacé par rapport à la partie qu'il entoure.
EP11700998.5A 2010-01-15 2011-01-13 Marteau perforateur et/ou à percussion avec refroidissement par convection libre Active EP2523781B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010004723A DE102010004723A1 (de) 2010-01-15 2010-01-15 Bohr- und/oder Schlaghammer mit Freikonvektions-Kühlung
PCT/EP2011/000126 WO2011085986A1 (fr) 2010-01-15 2011-01-13 Marteau perforateur et/ou percuteur à refroidissement par convection libre

Publications (2)

Publication Number Publication Date
EP2523781A1 EP2523781A1 (fr) 2012-11-21
EP2523781B1 true EP2523781B1 (fr) 2014-04-02

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EP11700998.5A Active EP2523781B1 (fr) 2010-01-15 2011-01-13 Marteau perforateur et/ou à percussion avec refroidissement par convection libre

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US (1) US9254559B2 (fr)
EP (1) EP2523781B1 (fr)
CN (1) CN102770246B (fr)
DE (1) DE102010004723A1 (fr)
WO (1) WO2011085986A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110496828B (zh) * 2019-09-06 2023-08-15 中冶赛迪信息技术(重庆)有限公司 利用冷热形变差自破壳除垢方法、装置及打壳锤头

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH110334A (de) * 1924-05-26 1925-06-16 Pennsylvania Gasoline Drill Co Schlagwerkzeug.
GB236348A (en) * 1924-05-26 1925-07-09 Edmund Willson Roberts Improvements in portable impact tool
GB255519A (en) * 1925-04-21 1926-07-21 John Forster Alcock Improvements in or relating to percussive tools
US1911813A (en) * 1927-09-28 1933-05-30 Black & Decker Mfg Co Portable power hammer
US1934935A (en) * 1930-09-10 1933-11-14 Luxmore William Carburetor for internal combustion engines
US2609813A (en) * 1946-08-15 1952-09-09 Chicago Pneumatic Tool Co Gas hammer
DE3035351A1 (de) * 1980-09-19 1982-05-06 Wacker-Werke Gmbh & Co Kg, 8077 Reichertshofen Hammer mit verbrennungsmotor
DE50112450D1 (de) * 2001-10-15 2007-06-14 Hilti Ag Kühlluftleitung für ein Elektrohandwerkzeuggerät mit elektropneumatischem Schlagwerk
GB2385017B (en) * 2002-02-08 2005-06-29 Black & Decker Inc Drilling and/or hammering tool
DE10302027A1 (de) * 2003-01-21 2004-07-29 Hilti Ag Handgeführtes Arbeitsgerät
JP4485190B2 (ja) * 2003-12-26 2010-06-16 株式会社マキタ 電動ハンマ
DE202004006553U1 (de) 2004-04-26 2004-07-08 Wacker Construction Equipment Ag Arbeitsgerät mit durchlüfteter Haube
DE102004058696A1 (de) * 2004-12-06 2006-06-08 Hilti Ag Elektrowerkzeuggerät
DE102006029634A1 (de) * 2006-06-28 2008-01-03 Robert Bosch Gmbh Elektrohandwerkzeugmaschine
JP2008173716A (ja) * 2007-01-18 2008-07-31 Max Co Ltd ブラシレスモータを備えた電動工具

Also Published As

Publication number Publication date
US20130118768A1 (en) 2013-05-16
DE102010004723A1 (de) 2011-07-21
CN102770246B (zh) 2015-09-16
US9254559B2 (en) 2016-02-09
CN102770246A (zh) 2012-11-07
WO2011085986A1 (fr) 2011-07-21
EP2523781A1 (fr) 2012-11-21

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