EP2307173A1 - Dispositif de percussion - Google Patents

Dispositif de percussion

Info

Publication number
EP2307173A1
EP2307173A1 EP09779571A EP09779571A EP2307173A1 EP 2307173 A1 EP2307173 A1 EP 2307173A1 EP 09779571 A EP09779571 A EP 09779571A EP 09779571 A EP09779571 A EP 09779571A EP 2307173 A1 EP2307173 A1 EP 2307173A1
Authority
EP
European Patent Office
Prior art keywords
unit
transmission
wobble
impact device
piston
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.)
Withdrawn
Application number
EP09779571A
Other languages
German (de)
English (en)
Inventor
Thomas Bernhardt
Tobias Herr
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2307173A1 publication Critical patent/EP2307173A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
    • B25D2211/06—Means for driving the impulse member
    • B25D2211/061—Swash-plate actuated impulse-driving mechanisms

Definitions

  • the invention relates to a percussion device, in particular for a drill and / or chisel, with a percussion unit and a transmission unit having at least one wobble leg and which is provided to transmit a movement to the percussion unit.
  • the impact device has a transmission pin, the one
  • Main extension direction having a component parallel to a main extension direction of the wobble leg.
  • the term “intended” should be understood to mean in particular specially designed and / or specially equipped.
  • "Furthermore, a" percussion unit “should be understood to mean, in particular, a unit which, during operation of the hand-held power tool, generates a percussion impulse and a transmission of the percussion impulse Schlagim- pulses is provided on a tool.
  • a "transfer pin” is to be understood here as meaning, in particular, a component and / or an element which is arranged to transmit a force to the percussion unit, in particular a piston unit of the percussion unit, in particular along a force flow direction, between the transfer unit and the percussion unit can be designed as a separate component or from the
  • a "main extension direction” is to be understood as meaning, in particular, a direction along or parallel to a longitudinal extension and / or a length of a component and / or a structural unit
  • a "main extension direction with a component parallel to a main extension direction” should be understood to mean that the Main extension direction of the transfer pin has a non-zero component parallel to the main extension direction of the wobble leg.
  • the main extension direction of the transfer pin is oriented perpendicular to an axial direction or a main extension direction of a piston of the striking mechanism unit.
  • the inventive design a particularly space-saving and compact impact device or hand tool can be built, in particular by the transmission unit can be passed at least partially on a piston of a piston unit and a power flow of the transmission unit by means of the transmission bolt on the piston or on the piston unit can be realized.
  • the transmission unit has a swash bearing and the transmission pin is arranged on a side facing away from the swash bearing of the transmission unit side of a piston unit of the percussion unit on the piston unit.
  • the piston unit can be used both by a piston alone, such as a pot piston, as well as several
  • Components such as from a hammer piston, a connecting rod and / or a bearing element, etc.
  • a "side of the piston unit facing away from the swash bearing” should be understood in particular a side and / or a region of the piston unit, preferably a pot piston, and / or viewed at least partially from a center axis of the piston unit in a direction away from the swash bearing It can be a large lever effect in the transmission of a drive movement and thus a large piston stroke and thus a high impact velocity during operation of the drill and / or chisel, especially at a constant or nearly constant center distance between a central axis the piston unit and a rotation axis an intermediate shaft or the wobble bearing can be achieved.
  • an angular range covered by the moving wobble limb during operation of the wobble bearing to achieve a desired stroke movement of a piston can be reduced and thus a possible imbalance during operation of the handheld power tool can at least be reduced or prevented.
  • assembly of the piston unit can be simplified by the position of the transmission bolt or incorrect assembly of the piston unit can be prevented.
  • a force flow direction of the transmission bolt is at least oppositely directed in at least one operating position of a force flow direction of the wobble arm.
  • a "force flow direction” should be understood to mean, in particular, a direction of a force flow, in particular of a main force flow, through a component and / or an element during operation of the impact device, wherein a "force flow” is in particular a path of a force and / or a moment in a component, in particular in the transfer bolt, from a point of application or a point of introduction of force to an exit point or up to a point at which the force and / or the moment is absorbed by a reaction force and / or a reaction moment , to be understood.
  • substantially oppositely directed is to be understood in particular as meaning that a direction with respect to a further direction encloses an angle between 150 ° and 230 ° and particularly preferably between 175 ° and 185 ° C.
  • a lever length of the wobble limb can be advantageous can be easily adapted to a desired stroke movement of a piston.
  • the transmission pin is stepped, whereby the impact device or the drill and / or chisel hammer can be built particularly advantageous short, namely by a step of the transfer bolt leverage the wobble leg at a low deflection angle or wobble angle of the wobble leg can be achieved in the operation of the drill and / or chisel hammer.
  • a particularly advantageous and in particular structurally simple bridging of a varying height difference between a piston, in particular a center axis of the piston, and the transmission unit, in particular a bearing point on an end remote from the swash bearing Taumelschenkels the transmission unit, can be achieved during operation of the drill and / or chisel hammer if the transmission unit has at least one transmission means has, on which the transmission pin is movably mounted.
  • the transmission means and the transmission bolt are firmly connected to each other and a compensating movement can take place at a bearing point of the transmission bolt on the piston unit and / or within the piston unit.
  • the transmission pin has at least one longitudinal axis and the transmission means is at least partially rotatable about the longitudinal axis of the transmission pin.
  • a "longitudinal axis of the transfer bolt” should be understood to mean, in particular, an axle which extends along, in particular parallel, a length and / or the main direction of extension of the transfer bolt oscillatingly changing orientation of the at least one wobble limb, in particular a surface of the wobble limb facing the piston, are compensated with low wear during the force transmission with respect to a piston axis.
  • the transmission unit has at least two wobble legs and the transmission means is arranged between the two wobble legs.
  • the term "between the two wobble legs” should be understood in particular to mean that the transmission means preferably faces away from the wobble bearing between two end regions, in particular between two along a longitudinal extension of the wobble legs
  • the wobble legs is arranged.
  • a stable alignment of the two wobble legs and an advantageous force flow from the wobble legs via the transmission means to the piston unit or the transmission bolt can be achieved in a structurally simple manner.
  • the transmission means is at least partially formed integrally with the at least one wobble legs.
  • integral should be understood to mean, in particular, one-piece and / or formed from a cast and / or designed as a component. [Grund Grund] Basically, a two-part design is conceivable between the transmission means and the wobble leg, in particular if the transmission means are movable relative to the wobble leg is stored. A structurally simple and in particular inexpensive to produce transmission means can be advantageously achieved when the transmission means is bolt-shaped.
  • bolt-shaped is to be understood in particular as meaning that the transmission means has a length that is preferably greater, in particular at least twice greater, than a width and / or a transverse extent of the transmission means
  • an advantageous mounting, in particular a moveable mounting, preferably a rotational movement-enabling mounting, of the transmission element on the at least one wobble limb can be achieved bend-soft along its longitudinal direction and transversely to the longitudinal direction is formed rigid.
  • the transmission means is at least partially formed by a hinge unit, whereby a particularly low-wear mounting of the transmission bolt can be achieved at the transmission means.
  • a hinge unit is to be understood as meaning, in particular, a unit which is provided for receiving forces, in particular forces with changing directions, and / or for supporting components which are arranged to be movable about a pivot axis Axial offset of forces acting along different axes on the joint unit, be compensated advantageous.
  • the joint unit is formed by a ball joint unit, which in particular rotational forces, especially in spatially and / or temporally oscillating movements, and translational forces can be easily taken constructively or an advantageous storage of at least two mutually movable components, in particular with a changing alignment of axes of movement of the mutually movable components, can be achieved.
  • the joint unit can also be formed by a further joint unit which appears to the skilled person to be useful.
  • the hinge unit is arranged at least partially against rotation on the transmission pin, whereby a direct transmission of a force from the hinge unit to the transmission pin or to the piston unit can be achieved particularly advantageous.
  • an inner ring of the joint unit is arranged against rotation on the transmission pin.
  • the inner ring can in this case by means of a press fit on the transmissive be arranged bolts and / or a further, the expert appears to be useful storage and / or attachment.
  • the impact device has a guide rail and the transmission pin is at least partially axially guided in the guide rail.
  • "axial" is to be understood as meaning, in particular, a direction parallel to an axial direction or a central axis of the piston, whereby an undesired force component, which is aligned in particular transversely to a direction of movement of a piston, can advantageously be used during operation of the drill and / or bit hammer.
  • This pressure can be reduced and / or prevented, and thus wear of the piston can be reduced advantageously
  • the guide rail is preferably formed by a sliding guide for the transmission bolt.
  • a particularly short length of the impact device and thus of the power tool can be advantageously achieved if the transmission unit has at least one wobble leg, which is guided in at least one operating position along an axial extent of the piston unit adjacent to the piston unit.
  • the term "next to” means in particular that a shortest distance between the wobble leg and the piston unit is aligned perpendicular to a main extension, along the axial extension, in particular a length of the piston unit, and is preferably greater than a radius of the piston unit.
  • the transmission unit has at least two wobble limbs which are guided past the piston unit in at least one operating position along an axial extension of the piston unit, an advantageous force distribution in the loading can also be achieved.
  • operation of the percussion device or of the drill and / or chisel hammer can be achieved in a power transmission from the transmission unit to the percussion unit and it can be a punctual loading of individual components are reduced and thus a lifetime of the individual B parts can be advantageously increased.
  • the impact device according to the invention in a hand tool in particular a drill and / or chisel, are used.
  • FIG. 1 shows a drill and / or chisel hammer with a percussion device in a schematic side view
  • Fig. 2 shows a first embodiment of the impact device with one of a
  • FIG. 3 shows the impact device from FIG. 3 in a sectional illustration
  • Fig. 5 shows a second embodiment of the impact device with a transmission means formed by a bolt in a perspective view.
  • FIG. 1 shows a hand-held power tool formed by a drill and / or chisel hammer 12.
  • the drill and / or chisel hammer 12 has a housing 54 and a tool holder 56 for receiving a drill and / or chisel tool, not shown.
  • On a side facing away from the tool holder 56 side 58 of the drill and / or chisel hammer 12 has a main handle 60 integrated in the housing 54.
  • the drill and / or chisel hammer 12 also has an impact device 10, which has a percussion unit 14, which is provided for generating and transmitting a shock pulse to the drilling and / or chiseling tool, and a transmission unit 18, which is for a transmission a drive torque is provided on the percussion unit 14.
  • the drive torque is generated during operation of the drill and / or chisel hammer 12 by a motor unit 62 and a non-illustrated motor shaft of the motor unit 62 to an intermediate shaft 64 and of this on the Transmission unit 18 on the percussion unit 14 and / or transmitted via a gear stage on a rotating output means, such as the hammer tube 66, to a rotation of the drilling and / or chiselling tool.
  • the transmission unit 18 has a wobble bearing 32, which is mounted on the intermediate shaft 64.
  • FIGS. 2 to 4 show a first exemplary embodiment of the impact device 10.
  • the percussion unit 14 has a piston unit 16 with a pot piston 68 which is mounted axially movable in the hammer tube 66 of the percussion unit 14.
  • the percussion unit 14 or the piston unit 16 has a transmission pin 24 which has a main extension direction 26 with a component parallel to a main extension direction 28 of a main extension direction
  • the transmission bolt 24 is arranged along a force flow between the transmission unit 18 and the piston unit 16 and serves to transmit power from the transmission unit 18 to the pot piston 68.
  • the transmission bolt 24 is arranged on a side 34 of the pot piston 68 facing away from the swash bearing 32. wherein the transmission pin 24 is aligned along a direction 70 of a rotation axis 72 of the intermediate shaft 64 in the direction of a longitudinal axis and a center axis 74 of the piston unit 16 substantially parallel to the direction 70 and extends away from the pot piston 68.
  • the pot piston 68 also has a cylindrical receiving portion 76 for receiving a
  • the transmission pin 24 is arranged (see Figures 2 and 3).
  • the transfer pin 24 is firmly connected to the pot piston 68 and the mounting sleeve 80.
  • the transmission pin 24 has a recess 108 on a side 110 facing the swash bearing 32, in which a screw 112 is inserted, which screws the transmission pin 24 with the pot piston 68 or the mounting sleeve 80 of the pot piston 68.
  • the transmission pin 24 is formed integrally with the mounting sleeve 80, is pressed with the mounting sleeve 80 and / or by means of another, the
  • the transmission pin 24 also has along its longitudinal axis 44 a stepped shape, wherein a step 82 of the transmission pin 24 between a disposed in the mounting sleeve 80 first portion 84 and the pot piston 68 away extending second portion 86 of the transmission pin 24 is arranged.
  • the two partial regions 84, 86 are aligned parallel to one another and perpendicular to the central axis 74 of the piston unit 16.
  • a central portion 88 of the transmission bolt 24 is aligned substantially perpendicular to the first and the second portion 84, 86 and extends on a radially outwardly directed wall 90 of the pot piston 68 in the direction of the receiving portion 76 on the pot piston 68 ( Figure 3).
  • the transmission unit 18 has the two wobble legs 20, 22, which are at least partially formed integrally with the swash bearing 32.
  • the swash bearing 32 has a ball bearing and is provided for implementing a rotational movement of the intermediate shaft 64 in an axial movement of the pot piston 68.
  • the two wobble legs 20, 22 extend from the wobble bearing 32 viewed from a rotation axis 72 of the intermediate shaft 64 in the direction 70 of the pot piston 68, the wobble legs 20, 22 extending substantially perpendicular to an axis 92 of an outer ring 94 of the wobble bearing 32.
  • the two wobble legs 20, 22 are also arranged along a circumferential direction 96 of the outer ring 94 on two opposite sides of the outer ring 94 and formed integrally therewith.
  • the two wobble legs 20, 22 are laterally adjacent to the
  • Piston 68 passed, in which case the main extension direction 28 of the wobble legs 20, 22 skewed to the central axis 74 of the piston unit 16 extends ( Figure 2).
  • the transmission unit 18 has a transmission means 42, on which the transmission pin 24 is movably mounted, wherein the transmission means 42 is arranged at least partially rotatable about the longitudinal axis 44 of the transmission pin 24.
  • the transmission means 42 is formed by a hinge unit 46, which is designed as a ball joint unit 48.
  • the ball joint unit 48 has an outer joint ring ball 98, an inner joint ring ball 100, and a slip ring 102 disposed between the outer joint ring ball 98 and the inner joint ring ball 100 (FIG. 3).
  • the sliding ring 102 could also be integral with the outer
  • Joint ring ball 98 may be formed.
  • the outer joint ring ball 98 of the ball joint unit 48 is integrally formed with the two wobble legs 20, 22, wherein the outer joint ring ball 98 between the two wobble legs 20, 22 is arranged.
  • the outer joint-ring ball 98 is guided along the main extension direction 28 of the wobble legs 20, 22 on the wobble axis.
  • ger 32 remote end portions 104, 106 of the two wobble legs 20, 22 are arranged.
  • the two wobble limbs 20, 22 are bent on the end regions 104, 106 facing away from the wobble bearing 32, wherein the end regions 104, 106 of the two wobble limbs 20, 22 converge toward one another (FIGS. 2 and 4).
  • the inner joint ring ball 100 is fixed to the transmission pin 24, in that the inner joint ring ball 100 is pressed with the transmission pin 24.
  • the inner joint ring ball 100 is thus arranged against rotation on the transmission pin 24, so that a relative movement between the transmission pin 24 and the inner joint ring ball 100 is prevented.
  • a relative movement between the transmission pin 24 and the ball joint unit 48 takes place during operation of the impact device 10 or of the drill and / or chisel hammer 12 between the outer joint ring ball 98 and the inner joint ring ball 100 via the sliding ring 102
  • Ball joint unit 48 is disposed between the wobble legs 20, 22 and the transmission pin 24 along the power flow.
  • the force flow direction 36 of the transmission pin 24 is in at least one operating position of one of the two wobble legs 20, 22 of the power flow direction 38, 40 of the wobble legs 20, 22 opposite directions (see Figure 4).
  • the impact device 10 For guiding the transfer bolt 24 in an axial direction 114, which is aligned parallel to the center axis 74 of the piston unit 16, the impact device 10 also has a guide rail 50 (FIGS. 2 and 3).
  • the transmission pin 24 is arranged in the guide rail 50 with an end region 116 facing away from the pot piston 68.
  • the guide rail 50 is arranged on a housing, not shown, of the drill and / or chisel hammer 12.
  • the transmission pin 24 has a sliding element 118.
  • the sliding member 118 is cup-shaped and arranged at the end portion 116 of the transmission pin 24 about the transmission pin 24.
  • the transmission pin 24 has a bore 120 extending along its longitudinal axis 44 in this end region for a weight reduction.
  • FIGS. 2 to 4 show various operating positions of the impact device 10 during operation of the drill and / or chisel hammer 12.
  • the pot piston 68 driven by the transfer unit 18, moves periodically along the axial direction 114 from a first, the tool holder 56 facing end position (shown in phantom), in a second, the tool holder 56 facing away from the end position and back.
  • the first final position tion are both wobble legs 20, 22 in a first, the tool holder 56 facing end position.
  • the two wobble legs 20, 22 are sequentially moved out of their end position, so that the wobble legs 20, 22 along the axial direction 114 at different positions ( Figure 4).
  • the two describe the swashbuckle
  • a transition from the second end position to the first end position of the pot piston 68 is analogous to the transition of the first to the second end position.
  • the transfer means 42 together with the two wobble legs 20, 22, clamps a plane which in the second end position during operation of the drill and / or chisel hammer 12 is pierced by the pot piston 68 with an almost complete cross-sectional area 122.
  • FIG. 5 shows an alternative exemplary embodiment. Essentially consistent
  • An impact device 10a of a drill and / or chisel hammer 12 has a striking mechanism unit 14a and a transmission unit 18a.
  • the transmission unit 18a comprises a wobble bearing 32a and two wobble legs 20a, 22a, which are used to transmit a movement or a movement
  • the impact device 10a also has a transmission pin 24a, which has a main extension direction 26a with a component parallel to a main extension direction 28a of one of the two wobble legs 20a, 22a.
  • the transmission Bolt 24a is pressed with a mounting portion 128a of the pot piston 68a.
  • the attachment area 128a is arranged along an axial direction 114a of the pot piston 68a on a side 78a facing away from a cylindrical receiving area 76a of the pot piston 68a.
  • a transmission means 42a is arranged, which is bolt-shaped and together with the two wobble legs 20a, 22a two bearing points 124a, 126a forms.
  • the transmission means 42a is aligned substantially transversely to the main extension direction 28a of the wobble legs 20a, 22a and in at least one operating position transverse to the axial direction 114a.
  • the two wobble legs 20a, 22a on one end portion 104a, 106a facing away from the wobble bearing 32a are each integrally formed with the end portions 104a, 106a
  • the transmission means 42a has, in a middle region 136a along its longitudinal axis 134a, a bore 138a, which is aligned essentially transversely to the longitudinal axis 134a.
  • the transmission pin 24a is movably mounted along a longitudinal axis 44a of the transmission pin 24a and rotatably mounted in a circumferential direction 140a about the longitudinal axis 44a (FIG. 3).
  • a compensation of a changing height difference takes place during a force transmission between the end regions 104a, 106a of the wobble limbs 20a, 22a facing away from the swash bearing 32a by the movable mounting of the transmission pin 24a between the transmission means 42a and the transmission pin 24a and a center axis 74a of the pot piston 68a.
  • the two wobble legs 20a, 22a are moved successively from a first end position to a second end position during operation of the impact device 10a, whereby an alignment of the longitudinal axis 134a of the transmission means 42a with respect to the central axis 74a of the pot piston 68a changes. This pivoting movement is compensated by the movable mounting of the transmission pin 24a in the transmission means 42a.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Crushing And Grinding (AREA)
  • Earth Drilling (AREA)
  • Drilling And Boring (AREA)

Abstract

La présente invention concerne un dispositif de percussion destiné notamment à un marteau perforateur et/ou à un marteau burineur (12) comprenant une unité de percussion (14; 14a) et une unité de transmission (18;18a) qui présente au moins une branche de culbuteur (20; 22; 20a; 22a) et qui est conçue pour transmettre un mouvement à l'unité de percussion (14; 14a). Selon l'invention, le dispositif de percussion présente un boulon de transmission (24; 24a) qui a une direction d'extension principale (26; 26a) comprenant une composante parallèle à la direction d'extension principale (28; 28a) de la branche de culbuteur (20, 22; 20a, 22a).
EP09779571A 2008-07-28 2009-05-28 Dispositif de percussion Withdrawn EP2307173A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200810040767 DE102008040767A1 (de) 2008-07-28 2008-07-28 Schlagvorrichtung
PCT/EP2009/056515 WO2010012521A1 (fr) 2008-07-28 2009-05-28 Dispositif de percussion

Publications (1)

Publication Number Publication Date
EP2307173A1 true EP2307173A1 (fr) 2011-04-13

Family

ID=40885976

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09779571A Withdrawn EP2307173A1 (fr) 2008-07-28 2009-05-28 Dispositif de percussion

Country Status (5)

Country Link
EP (1) EP2307173A1 (fr)
CN (1) CN102105273B (fr)
DE (1) DE102008040767A1 (fr)
RU (1) RU2011107126A (fr)
WO (1) WO2010012521A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013151055A (ja) * 2012-01-26 2013-08-08 Makita Corp 打撃工具

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2463387A (en) * 1944-07-19 1949-03-01 Edward M Hoover Power tool
DE2252951B2 (de) * 1972-10-28 1981-09-10 Robert Bosch Gmbh, 7000 Stuttgart Bohrhammer
DE3611890A1 (de) * 1985-12-17 1987-10-15 Licentia Gmbh Antrieb fuer das schlagwerk eines elektropneumatisch arbeitenden drehschlagbohrhammers
DE3712456A1 (de) * 1987-04-11 1988-10-27 Licentia Gmbh Elektropneumatisch arbeitender drehschlagbohrhammer
USRE35372E (en) * 1988-06-07 1996-11-05 S-B Power Tool Company Apparatus for driving a drilling or percussion tool
DE19851888C1 (de) * 1998-11-11 2000-07-13 Metabowerke Kg Bohrhammer
DE19856638A1 (de) * 1998-12-03 2000-06-08 Black & Decker Inc Antrieb für ein Elektrowerkzeug, insbesondere einen Bohrhammer, sowie Bohrhammer
GB2394437A (en) * 2002-10-23 2004-04-28 Black & Decker Inc Hammer including a piston with wear-reducing washers
CN2707439Y (zh) * 2004-05-25 2005-07-06 铁鎯电动工具有限公司 三功能轻型电锤
DE102004026845A1 (de) * 2004-06-02 2005-12-22 Robert Bosch Gmbh Handwerkzeugmaschine, insbesondere Bohr- und/oder Schlaghammer
DE102005041447A1 (de) * 2005-08-31 2007-03-01 Robert Bosch Gmbh Bohrhammer
DE102006032214A1 (de) * 2006-07-12 2008-01-17 Robert Bosch Gmbh Handwerkzeugmaschine mit einer Schlagwerkeinheit
JP5015653B2 (ja) * 2007-05-01 2012-08-29 株式会社マキタ ハンマードリル

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2010012521A1 *

Also Published As

Publication number Publication date
WO2010012521A1 (fr) 2010-02-04
RU2011107126A (ru) 2012-09-10
CN102105273A (zh) 2011-06-22
DE102008040767A1 (de) 2010-02-04
CN102105273B (zh) 2014-05-28

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