WO2017169393A1 - Engin de chantier à percussion - Google Patents

Engin de chantier à percussion Download PDF

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Publication number
WO2017169393A1
WO2017169393A1 PCT/JP2017/007130 JP2017007130W WO2017169393A1 WO 2017169393 A1 WO2017169393 A1 WO 2017169393A1 JP 2017007130 W JP2017007130 W JP 2017007130W WO 2017169393 A1 WO2017169393 A1 WO 2017169393A1
Authority
WO
WIPO (PCT)
Prior art keywords
work machine
machine according
center line
rotation center
casing
Prior art date
Application number
PCT/JP2017/007130
Other languages
English (en)
Japanese (ja)
Inventor
智志 阿部
康平 脇田
Original Assignee
日立工機株式会社
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 日立工機株式会社 filed Critical 日立工機株式会社
Priority to JP2018508797A priority Critical patent/JP6521175B2/ja
Publication of WO2017169393A1 publication Critical patent/WO2017169393A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • B25D11/06—Means for driving the impulse member
    • B25D11/12—Means for driving the impulse member comprising a crank mechanism
    • 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
    • B25D17/26—Lubricating

Definitions

  • the present invention relates to a striking work machine that generates a striking force by reciprocating an operation member with rotational power of a motor.
  • Japanese Patent Application Laid-Open No. 2004-133867 discloses a striking work machine that generates a striking force by reciprocating an operation member with the rotational power of a motor.
  • the impact working machine described in Patent Document 1 includes a casing, a motor chamber formed in the casing, a cylinder provided in the casing, an operation member and a striker accommodated in the cylinder, and a pressure formed in the cylinder.
  • An insert for closing the opening of the housing is provided, and a cover plate is screwed to the insert.
  • An equilibrium chamber is provided between the insert and the cover plate.
  • the insert has a through hole that connects the outside of the casing and the equilibrium chamber.
  • the insert has a vent that connects the equilibration chamber and the interior of the casing. Further, a lubricant is present inside the casing.
  • An object of the present invention is to provide a striking work machine capable of suppressing the lubricant inside the casing from leaking to the outside of the casing.
  • the present invention is provided in a power conversion unit that converts rotational power of a motor into a reciprocating force, an operation member that is reciprocated by the power conversion unit, a casing that supports the operation member, and the casing.
  • a striking work machine having a pressure chamber that generates a striking force by operation of the operating member, the air chamber being provided inside the casing and partitioned from the pressure chamber by the operating member; and the air chamber And a vent connected to the outside of the casing, disposed between the vent and the power converter, and capable of vibrating with respect to the casing and filling the air chamber And a restricting member that prevents leakage of the lubricant that has leaked out of the casing through the vent.
  • the regulating member vibrates, it is possible to suppress the lubricant inside the casing from being removed from the periphery of the vent and leaking the lubricant to the outside of the casing.
  • FIG. 2 is a plan sectional view showing a configuration example 1 of the striking work machine in FIG. 1.
  • bottom sectional drawing which shows the structural example 1 of the striking work machine of FIG.
  • a longitudinal cross-sectional view which shows the structural example 2 of the principal part of the striking work machine of FIG.
  • a plane sectional view showing example 2 of composition of the principal part of the hitting work machine of Drawing 1.
  • It is a longitudinal cross-sectional view which shows the structural example 3 of the principal part of the striking work machine of FIG.
  • It is a longitudinal cross-sectional view which shows the structural example 4 of the principal part of the striking work machine of FIG.
  • the striking work machine 10 shown in FIG. 1 is also called a hammer drill, and the tool 11 is attached to and detached from the striking work machine 10.
  • the impact work machine 10 can apply rotational power and impact force to the tool 11.
  • the hitting work machine 10 can perform a turning work, a drilling work, and a crushing work using concrete, stone, or the like as an object.
  • the striking work machine 10 has a casing 12, and the casing 12 has a motor case 13, a gear case 40 fixed to the motor case 13, a crank case 18 fixed to the gear case 40, and a connection in which the motor case 13 is fixed. And a handle 16 provided on the connecting portion 14.
  • a trigger 17 is provided on the handle 16.
  • a power cable 77 is attached to the handle 16. The power cable 77 is connected to a power source, for example, an AC power source.
  • the crankcase 18 is made of metal, and the front case 19 is fixed to the crankcase 18.
  • the cylinder 20 is disposed over the crankcase 18 and the front case 19.
  • the cylinder 20 is rotatable about the axis A1.
  • a cylindrical tool holder 21 is attached to the tip of the cylinder 20.
  • the tool holder 21 is arranged from the inside of the cylinder 20 to the outside of the front case 19.
  • the tool holder 21 rotates integrally with the cylinder 20 and can be detached from the cylinder 20.
  • a stopper 22 is provided on the inner surface of the tool holder 21.
  • the stopper 22 is formed by inclining the inner surface of the tool holder 21 in a tapered shape.
  • the tool 11 can be attached to and detached from the tool holder 21.
  • a holder 23 is attached to the tip of the front case 19.
  • An intermediate striker 24 is disposed from the tool holder 21 to the cylinder 20.
  • the intermediate striker 24 is movable in the direction of the axis A1.
  • An annular stopper 25 is provided in the cylinder 20.
  • the intermediate striker 24 is restricted by the stopper 22 and the stopper 25 in the movement range in the direction of the axis A1.
  • a striker 26 is provided in the cylinder 20 so as to be movable in the direction of the axis A1.
  • a seal member 27 is attached to the outer peripheral surface of the striker 26.
  • the piston 28 is accommodated in the cylinder 20, and the piston 28 can reciprocate in the direction of the axis A1.
  • the direction of the axis A1 is the reciprocating direction of the piston 28.
  • a pressure chamber 29 is provided between the striker 26 and the piston 28 inside the cylinder 20.
  • a breathing hole 30 and an exhaust hole 31 penetrating the cylinder 20 in the radial direction are provided.
  • An annular bevel gear 32 is attached to the outer peripheral surface of the cylinder 20. The bevel gear 32 can rotate together with the cylinder 20.
  • the electric motor 33 is provided in the motor case 13.
  • the electric motor 33 includes a cylindrical stator 34 around which a coil is wound, and a rotor 35 disposed inside the stator 34.
  • the output shaft 36 is fixed to the rotor 35, and the output shaft 36 and the rotor 35 are rotatable about the axis A2.
  • the output shaft 36 is rotatably supported by bearings 37 and 38, and a drive gear 39 is provided on the outer peripheral surface of the output shaft 36.
  • the gear case 40 is a partition wall that separates the space in which the electric motor 33 is disposed from the space in which the crankcase 18 is disposed.
  • a crank mechanism 41 is provided in the crankcase 18.
  • the crank mechanism 41 is a power conversion unit that converts the rotational power of the output shaft 36 of the electric motor 33 into the reciprocating force of the piston 28.
  • the crank mechanism 41 includes a driven gear 42 that meshes with the drive gear 39, a crankshaft 43 to which the driven gear 42 is fixed, and a connecting rod 44 that connects the crankshaft 43 and the piston 28.
  • the crankshaft 43 is supported by a bearing 45 so as to be rotatable about a rotation center line A3.
  • a crankpin 46 that is continuous with the crankshaft 43 is provided.
  • the crank pin 46 is arranged at a position eccentric from the rotation center line A3.
  • the crankpin 46 revolves around the rotation center line A3 when the crankshaft 43 rotates.
  • the rotation center line A3 is the revolution center of the crankpin 46.
  • the connecting rod 44 is rotatably connected to the crank pin 46.
  • a rotational power transmission shaft 47 is provided.
  • the rotational power transmission shaft 47 is rotatably supported by the gear case 40 and the crankcase 18 via bearings 48 and 49.
  • the rotation center line A4 of the rotational power transmission shaft 47 is parallel to the rotation center line A3.
  • the rotational power transmission shaft 47 is an element that transmits the rotational power of the output shaft 36 to the bevel gear 32, and a pinion gear 50 is provided on the rotational power transmission shaft 47.
  • the pinion gear 50 meshes with the bevel gear 32.
  • the driven gear 51 is fixed to the rotational power transmission shaft 47, and the driven gear 51 is engaged with the drive gear 39.
  • Oil seals 52 and 53 are attached to the crankcase 18.
  • the oil seal 52 seals between the crankshaft 43 and the crankcase 18, and the oil seal 53 seals between the rotational power transmission shaft 47 and the crankcase 18.
  • the crankcase 18 has a cylindrical portion 18A as shown in FIG. 2, and an inner cover 55 is provided to close the opening 54 of the cylindrical portion 18A.
  • the inner cover 55 is made of metal or synthetic resin.
  • the inner cover 55 is circular in a plan view perpendicular to the rotation center line A3.
  • the plan view perpendicular to the rotation center line A3 is also a plan view of the impact work machine 10.
  • An air chamber 56 is formed in the cylindrical portion 18A, and a seal member 78 is interposed at a contact portion between the inner cover 55 and the cylindrical portion 18A.
  • the seal member 78 hermetically seals the opening 54.
  • a vent hole 57 that penetrates the inner cover 55 in the thickness direction is provided.
  • the vent 57 is disposed at a position eccentric from the rotation center line A3 in a plan view perpendicular to the rotation center line A3.
  • the vent 57 is disposed on the axis A1 in a plan view perpendicular to the rotation center line A3, and is disposed outside the revolution range of the crankpin 46.
  • the vent 57 is disposed between the crankshaft 43 and the piston 28 in a plan view perpendicular to the rotation center line A3.
  • the vent hole 57 is disposed within a range of movement width in which the rotation center line A5 of the crankpin 46 revolves in a direction orthogonal to the axis A1.
  • the vent 57 is disposed in the direction perpendicular to the axis A ⁇ b> 1, that is, in the width direction of the casing 12. For this reason, even when the striker 10 is placed horizontally for a long time, even when grease accumulates on one side in the air chamber 56 in the direction orthogonal to the axis A1, the grease is transferred from the vent 57 to the outside of the crankcase 18. Can be prevented from leaking.
  • a felt 58 is attached to the inner cover 55 on the side opposite to the air chamber 56. The felt 58 has air permeability, and the felt 58 covers the vent hole 57.
  • the crank pin 46 and the connecting rod 44 are disposed in the air chamber.
  • the connecting rod 44 is disposed between the inner cover 55 and the crankshaft 43 in a side view including the rotation center line A3.
  • the piston 28 partitions the pressure chamber 29 and the air chamber 56.
  • a seal member 59 is attached to the outer peripheral surface of the piston 28, and the pressure chamber 29 and the air chamber 56 are hermetically separated.
  • the oil seals 52 and 53 seal the air chamber 56, and a lubricant is injected into the air chamber 56.
  • the lubricant is a gel-like grease.
  • a regulating member 60 is provided in the air chamber 56.
  • the restricting member 60 is a metal leaf spring.
  • the restricting member 60 includes a first plate portion 61 and a second plate portion 63 connected to the outside of the first plate portion 61 via a stepped portion 62.
  • a support hole 64 that penetrates the first plate portion 61 in the thickness direction is provided.
  • the regulating member 60 is formed in a band shape.
  • the first plate portion 61 and the second plate portion 63 are disposed at different positions in the direction of the rotation center line A3.
  • a support portion 65 protruding toward the crankshaft 43 from the surface of the inner cover 55 on the air chamber 56 side is provided.
  • the support part 65 is a cylinder arranged concentrically with the rotation center line A3.
  • the support portion 65 is inserted into the support hole 64 of the restriction member 60, and the restriction member 60 is attached to the support portion 65 by a stopper 66.
  • the support hole 64 is formed at an intermediate position of the regulating member 60 in the direction of the axis A1.
  • a first plate portion 61, a step portion 62, and a second plate portion 63 are formed on the regulating member 60 on both sides of the support hole 64 and the support portion 65 in the direction of the axis A ⁇ b> 1.
  • the second plate portions 63 disposed on both sides of the support hole 64 and the support portion 65 of the restriction member 60 in the direction of the axis A ⁇ b> 1 are free ends of the restriction member 60, respectively.
  • the restricting member 60 can vibrate with the support portion 65 as a fulcrum while attached to the support portion 65.
  • the thickness of the regulating member 60 in the direction of the rotation center line A3 is smaller than the amount of the support portion 65 protruding from the surface of the inner cover 55.
  • the second plate portion 63 is disposed between the crankshaft 43 and the first plate portion 61 in the direction of the rotation center line A3.
  • the arrangement position of the vent hole 57 is in the arrangement area of the second plate portion 63.
  • Two ribs 67 parallel to each other are provided on the surface of the inner cover 55 on the air chamber 56 side.
  • the two ribs 67 are arranged in parallel with the axis A1.
  • the support portion 65 is disposed between the rib 67 and the rib 67 in a plan view perpendicular to the rotation center line A3.
  • the restricting member 60 is arranged between the rib 67 and the rib 67 in a plan view perpendicular to the rotation center line A3, and the rotation with respect to the inner cover 55 is restricted.
  • the pressure in the pressure chamber 29 is increased to generate a strike force, and the striker 26 strikes the intermediate striker 24, and the strike force is applied via the tool 11. Is transmitted to the object. Further, the rotational power of the output shaft 36 is transmitted to the cylinder 20 via the driven gear 51, the rotational power transmission shaft 47, the pinion gear 50, and the bevel gear 32. The rotational power of the cylinder 20 is transmitted to the tool 11 via the tool holder 21. If the tool 11 is away from the object, the exhaust hole 31 leads to the pressure chamber 29. For this reason, even if the piston 28 operates, the pressure in the pressure chamber 29 does not increase. Accordingly, it is possible to prevent idle driving.
  • the lubricant filled in the air chamber 56 includes a bearing 45, a connecting portion between the crank pin 46 and the connecting rod 44, a connecting portion between the connecting rod 44 and the piston 28, a meshing portion between the pinion gear 50 and the bevel gear 32, and the piston 28. Lubricate the contact portion with the inner peripheral surface of the cylinder 20.
  • the outside of the crankcase 18 is atmospheric pressure.
  • air enters and exits through the vent 57 between the air chamber 56 and the outside of the crankcase 18.
  • the piston 28 moves in a direction approaching the striker 26, the air outside the crankcase 18 is sucked into the air chamber 56 through the vent 57.
  • the piston 28 operates in a direction away from the striker 26, the air in the air chamber 56 is discharged out of the crankcase 18 through the vent hole 57.
  • the restricting member 60 is disposed between the vent hole 57 and the crank mechanism 41 in the direction of the rotation center line A3. Therefore, when the air in the air chamber 56 is discharged to the outside of the crankcase 18 through the vent hole 57, the restriction member 60 blocks the movement of the lubricant in the air chamber 56.
  • the regulating member 60 is located between the crankpin 46 and the vent 57. For this reason, the restricting member 60 prevents the grease scattered from the crankpin 46 that rotates eccentrically about the rotation center line A3 from going directly to the vent hole 57. Therefore, the lubricant can be prevented from leaking from the vent 57 to the outside of the crankcase 18.
  • the regulating member 60 is formed in a strip shape extending in the direction of the axis A1 as shown in FIG. Since there is a space between the regulating member 60 and the cylindrical portion 18A in the direction orthogonal to the axis A1, the air flow through the vent 57 is not hindered.
  • the vent hole 57 is provided at a position close to the opening end 20A of the cylinder 20 in the direction of the axis A1. For this reason, when the piston 28 moves in the cylinder 20, the flow of air becomes smooth.
  • the crankcase 18 vibrates.
  • the crankcase 18 vibrates in the direction of the axis A1 and the direction of the rotation center line A3.
  • the second plate portion 63 that is the free end of the regulating member 60 vibrates in the direction of the rotation center line A3 with the support portion 65 as a fulcrum.
  • the lubricant adhering to the regulating member 60 is shaken off from the regulating member 60.
  • the vent hole 57 can be prevented from being blocked with the lubricant. That is, the function of adjusting the pressure of the air chamber 56 by the vent 57 can be maintained.
  • FIGS. 5 and 6 Another configuration example of the inner cover 55 and the regulating member 60 will be described with reference to FIGS. 5 and 6.
  • the support portion 65 In a plan view perpendicular to the rotation center line A3, the support portion 65 is in a position eccentric from the rotation center line A3.
  • the rotation center line A3 is located between the support portion 65 and the vent 57 in the direction of the axis A1.
  • the outer peripheral shape of the restricting member 60 shown in FIG. 5 is the same as the outer peripheral shape of the restricting member 60 shown in FIG.
  • Only one second plate portion 63 is provided. That is, the regulating member 60 is supported by the inner cover 55 in a cantilever state.
  • the support hole 64 is disposed on the opposite side of the second plate portion 63 in the direction of the axis A1 in a plan view perpendicular to the rotation center line A3. In a plan view perpendicular to the rotation center line A3, the position of the vent 57 is within the arrangement region of the second plate portion 63.
  • Other configurations shown in FIGS. 5 and 6 are the same as the other configurations shown in FIGS. 2 and 3.
  • the inner cover 55 is not provided with a support portion, and the support portion 68 is provided on the cylindrical portion 18 ⁇ / b> A of the crankcase 18.
  • the support portion 68 protrudes from the inner surface of the cylindrical portion 18A in the direction of the rotation center line A3, and a gap is formed between the support portion 68 and the cylindrical portion 18A.
  • the support portion 68 is disposed on the axis A1 in a plan view perpendicular to the rotation center line A3. That is, the rotation center line A3 is disposed between the support portion 68 and the vent hole 57 in the direction of the axis A1.
  • the restricting member 60 is disposed in the air chamber 56, and the restricting member 60 is connected to the fixing portion 69, the first plate portion 61 continuing to the fixing portion 69, and the first plate portion 61 via the step portion 62. And a second plate portion 63.
  • the fixed portion 69 is perpendicular to the first plate portion 61 in a side view including the rotation center line A3.
  • the fixing portion 69 is sandwiched between the gaps between the cylindrical portion 18 ⁇ / b> A and the support portion 68, and the restriction member 60 is fixed to the crankcase 18. Further, when the inner cover 55 is fixed to the crankcase 18, the inner cover 55 contacts the first plate portion 61 that is the upper end of the regulating member 60.
  • the inner cover 55 functions as a retaining member that presses the regulating member 60 from above in the direction of the rotation center line A3 and prevents the regulating member 60 from coming off between the support portion 68 and the cylindrical portion 18A. Thereby, the regulating member 60 is supported by the crankcase 18 in a cantilever state with the upper end of the fixed portion 69 as a fulcrum.
  • the arrangement area of the second plate portion 63 includes the arrangement position of the rotation center line A3 and the arrangement area of the vent hole 57.
  • the length of the first plate portion 61 in the direction of the axis A ⁇ b> 1 is shorter than the length of the second plate portion 63.
  • the stepped portion 62 is positioned between the rotation center line A3 and the support portion 68 in the direction of the axis A1.
  • Support portions 70 and 71 projecting from the inner surface of the cylindrical portion 18A toward the rotation center line A3 are provided.
  • the support portions 70 and 71 are arranged linearly along the direction of the rotation center line A3.
  • the support portion 70 is disposed on the axis A1 in a plan view perpendicular to the rotation center line A3.
  • the support portion 70 is disposed at a position farthest from the cylinder 20 in the direction of the axis A1 on the inner surface of the cylindrical portion 18A.
  • the support portion 71 is disposed at a position 90 degrees away from the support portion 70 in the circumferential direction of the cylindrical portion 18A.
  • a vent 72 that penetrates the cylindrical portion 18A inward and outward is provided. As shown in FIG. 10, the air vent 72 is disposed between the support portion 71 and the cylinder 20 in the circumferential direction of the cylindrical portion 18 ⁇ / b> A. The vent 72 is disposed between the inner cover 55 and the crank pin 46 in the direction of the rotation center line A3. The vent 72 communicates the air chamber 56 and the outside of the crankcase 18.
  • a restriction member 73 is provided in the air chamber 56, and the restriction member 73 is attached to the cylindrical portion 18A.
  • the regulating member 73 is integrally formed with a metal spring.
  • the restricting member 73 includes a first plate portion 74 and a second plate portion 76 that is continuous with the first plate portion 74 via a stepped portion 75. In plan view perpendicular to the rotation center line A3, the first plate portion 74 and the second plate portion 76 are each arcuate as shown in FIG. The end portion of the first plate portion 74 is pressed against the support portion 70, the stepped portion 75 is pressed against the support portion 71, and the restricting member 73 is fixed to the cylindrical portion 18A.
  • the second plate portion 76 is disposed inside the first plate portion 74 in the radial direction centering on the rotation center line A3.
  • the second plate portion 76 is disposed inside the vent hole 72 in the radial direction centered on the rotation center line A3.
  • the second plate portion 76 is not in contact with the inner surface of the cylindrical portion 18A.
  • the first plate portion 74 is in contact with the inner cover 55.
  • a minute gap is formed between the second plate portion 76 and the inner cover 55 in the direction of the rotation center line A3.
  • the second plate portion 76 and the inner cover 55 are not in contact with each other.
  • the arrangement region of the second plate portion 76 in the circumferential direction of the cylindrical portion 18 ⁇ / b> A includes the arrangement region of the vent holes 72.
  • the inner cover 55 shown in FIG. 9 does not include a support portion and a vent hole.
  • the crankcase 18 is a main body
  • the crank mechanism 41 is a power converter
  • the inner cover 55 is a cover.
  • the striking work machine is not limited to the embodiment, and can be variously changed without departing from the gist thereof.
  • the hammering machine includes a hammer driver in addition to a hammer drill that performs a drilling operation, a drilling operation, and a crushing operation using concrete or stone as an object.
  • the hammer driver rotates while the tool strikes a screw member as an object.
  • the striking work machine includes a hammer that applies striking force to the tool and does not apply rotational power to the tool.
  • the motor includes an electric motor, an internal combustion engine, a hydraulic motor, and a pneumatic motor.
  • the power source that supplies power to the electric motor includes an AC power source and a DC power source.
  • the direct current power source includes a battery that is detachable from the casing.
  • the lubricant includes a solid or gel grease.
  • the power converter that converts the rotational power of the motor into the reciprocating force of the operating member includes a cam mechanism in addition to the crank mechanism.
  • the first axis and the second axis are parallel to each other in addition to the structure in which the first axis of the motor output shaft and the second axis in the direction in which the operating member operates are arranged at right angles. Includes structure.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)

Abstract

La présente invention concerne un engin de chantier à percussion configuré de façon à supprimer la fuite d'un lubrifiant de l'intérieur d'un boîtier vers l'extérieur de celui-ci. Un engin de chantier à percussion (10) comprend : un piston animé d'un mouvement de va-et-vient par la puissance d'un moteur électrique ; un boîtier permettant de supporter le piston ; et une chambre de pression disposée à l'intérieur du boîtier et générant une force d'impact par l'actionnement du piston. L'engin de chantier à percussion (10) comprend également : une chambre à air (56) séparée de la chambre de pression par le piston et disposée à l'intérieur d'un carter (18) ; une ouverture d'écoulement d'air (57) ouverte vers la chambre à air (56) et raccordée à l'extérieur du carter (18) ; et un élément de restriction (60) capable de vibrer par rapport au carter (18) et de limiter la fuite d'un lubrifiant vers l'extérieur du carter (18) à travers l'ouverture d'écoulement d'air (57), le lubrifiant ayant été introduit dans la chambre à air (56).
PCT/JP2017/007130 2016-03-31 2017-02-24 Engin de chantier à percussion WO2017169393A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2018508797A JP6521175B2 (ja) 2016-03-31 2017-02-24 打撃作業機

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016-071257 2016-03-31
JP2016071257 2016-03-31

Publications (1)

Publication Number Publication Date
WO2017169393A1 true WO2017169393A1 (fr) 2017-10-05

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Application Number Title Priority Date Filing Date
PCT/JP2017/007130 WO2017169393A1 (fr) 2016-03-31 2017-02-24 Engin de chantier à percussion

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WO (1) WO2017169393A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS606367A (ja) * 1983-06-06 1985-01-14 ヒルテイ・アクチエンゲゼルシヤフト モ−タ駆動動力工具
JPS63118454U (fr) * 1987-01-27 1988-07-30
EP0589337A1 (fr) * 1992-09-24 1994-03-30 Robert Bosch Gmbh Machine outil à main, notamment marteau perforateur
JP2008284655A (ja) * 2007-05-18 2008-11-27 Hitachi Koki Co Ltd 動力工具
JP2011031363A (ja) * 2009-08-05 2011-02-17 Makita Corp 作業工具
JP2013078822A (ja) * 2011-10-04 2013-05-02 Makita Corp 作業工具

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS606367A (ja) * 1983-06-06 1985-01-14 ヒルテイ・アクチエンゲゼルシヤフト モ−タ駆動動力工具
JPS63118454U (fr) * 1987-01-27 1988-07-30
EP0589337A1 (fr) * 1992-09-24 1994-03-30 Robert Bosch Gmbh Machine outil à main, notamment marteau perforateur
JP2008284655A (ja) * 2007-05-18 2008-11-27 Hitachi Koki Co Ltd 動力工具
JP2011031363A (ja) * 2009-08-05 2011-02-17 Makita Corp 作業工具
JP2013078822A (ja) * 2011-10-04 2013-05-02 Makita Corp 作業工具

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JP6521175B2 (ja) 2019-05-29
JPWO2017169393A1 (ja) 2018-08-30

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