EP2017039A2 - Machine-outil manuelle dotée d'une sonnette - Google Patents

Machine-outil manuelle dotée d'une sonnette Download PDF

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Publication number
EP2017039A2
EP2017039A2 EP08104150A EP08104150A EP2017039A2 EP 2017039 A2 EP2017039 A2 EP 2017039A2 EP 08104150 A EP08104150 A EP 08104150A EP 08104150 A EP08104150 A EP 08104150A EP 2017039 A2 EP2017039 A2 EP 2017039A2
Authority
EP
European Patent Office
Prior art keywords
wobble
hand tool
adjusting
lifting body
tool according
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Withdrawn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
EP08104150A
Other languages
German (de)
English (en)
Other versions
EP2017039A3 (fr
Inventor
Josef Fünfer
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Publication of EP2017039A2 publication Critical patent/EP2017039A2/fr
Publication of EP2017039A3 publication Critical patent/EP2017039A3/fr
Withdrawn legal-status Critical Current

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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
    • B25D11/125—Means for driving the impulse member comprising a crank mechanism with a fluid cushion between the crank drive and the striking body
    • 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
    • B25D11/005—Arrangements for adjusting the stroke of the impulse member or for stopping the impact action when the tool is lifted from the working surface
    • 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
    • B25D11/062—Means for driving the impulse member comprising a wobbling mechanism, swash plate
    • 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
    • B25D2211/003—Crossed drill and motor spindles
    • 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
    • B25D2250/331—Use of bearings

Definitions

  • the invention relates to a hand tool with pneumatic percussion referred to in the preamble of claim 1.
  • Such hand tool machines are z. B. formed as a chisel or combi hammer.
  • From the DE 32 05 141 A1 is designed as an electrically operated hammer drill hand tool with an air cushion impact known, which is drivable via a wobble member of a swash plate drive.
  • the impact mechanism has a guided in a guide tube exciter element, such as an exciter piston, which is axially reciprocally movable by means of the wobble member.
  • the excitation element drives via an air cushion or an air spring also guided in the guide tube impact element that exerts a striker on a front recorded in a tool holder tool.
  • To adjust the maximum stroke of the exciter element of the wobble angle of the wobble member is adjustable via a stepping device designed as adjusting in three stages.
  • a hub body of the wobble member is rotatably adjustable relative to this under adjustment of the wobble angle relative to this and in the respective relative rotational position via coupling elements positively coupled to the holding body, wherein the holding body is seated obliquely on an intermediate shaft.
  • an axial displacement of the intermediate shaft in a stepwise rotational adjustment of the hub body to change the wobble angle is implemented via the step switching device.
  • step switching device is switchable only when switched off hand tool and also structurally very complex.
  • the present invention has for its object to provide a hand tool of the type mentioned above, which avoids the disadvantages mentioned.
  • the adjusting device has a displacement element displaceable along the longitudinal extension of the wobble element for the stepless adjustment of the wobble angle of the wobble element, whereby likewise a stepless adjustment of the stroke of the excitation piston is made possible. Due to the stepless controllability, it is also possible to perform an adjustment during operation of the power tool.
  • the percussion of the power tool can adapt so in operation to changed physical properties of the material to be machined, z. B. in the transition from plaster to brick or concrete.
  • a lifting body via which a lifting movement is transferable to the wobble member, wherein the lifting body via the adjusting element along a longitudinal extent of the wobble member is displaceable relative to this.
  • the lifting body not only serves to transmit the kinetic energy delivered by the motor to the wobble member, but, like the adjusting element, it is part of the adjusting device for adjusting the movement stroke of the exciter piston, by means of which the maximum possible wobble angle of the wobble member is adjustable.
  • the lifting body has a bearing receptacle through which the wobble member is guided in order to realize in a structurally simple manner a movement coupling of the lifting body and the wobble member along the stroke axis of the lifting body.
  • the lifting body on a slot for a rotatable eccentric pin which is spaced in the longitudinal direction of the lifting body of the bearing support for the wobble member, wherein the lifting body via the adjusting element along the longitudinal extension of the eccentric pin is axially displaceable.
  • a rotational movement coming from the engine via the eccentric pin can be converted into a lifting movement of the lifting body.
  • the eccentric pin is elongated to ensure engagement in the slot of the lifting body in all adjustment positions of the lifting body.
  • the wobble member is pivotally mounted via a pivot sleeve in the bearing receptacle in the lifting body, whereby a low-wear storage is ensured.
  • the pivot sleeve on a spherical outer shape and the bearing receiving a corresponding to the curvature of the spherical outer shape of the pivot sleeve inner contour is made possible relative to the lifting body while allowing an adjustment of the lifting body relative to the wobble member when the lifting body is displaced over the adjusting element in its position along the longitudinal extension of the wobble member.
  • a manually operable actuating element for the adjusting element is provided, via which an operator of the power tool can easily adjust the wobble angle of the wobble member and thus the stroke of the exciter piston.
  • the adjusting element has a first adjusting member which is coupled in terms of movement with a second adjusting member arranged on the actuating element, whereby a structurally simple movement coupling between the actuating element and the adjusting element of the adjusting device is achieved.
  • the actuating element is designed as a thumbwheel.
  • an end facing away from the exciter element of the wobble member on a bearing element which is pivotally mounted on an abutment element and axially fixed relative to its longitudinal extension, whereby a low-wear and durable pivotal mounting of the wobble member is achieved.
  • the bearing element is advantageously designed as a ball head, which is mounted in the counter-bearing element designed as a socket but pivotally fixed axially (based on its longitudinal extent).
  • FIGS. 1 to 3 a trained as a rotating and hammering combi hammer hand tool 10 is reproduced, which has a housing 11 in which a force acting on a tool holder 14 in a tool holder 14 impact mechanism 20, a total of 13 designated wobble drive and a motor 12 are arranged.
  • the percussion mechanism 20 has a guide tube 21, in which a exciter element 22 designed as an exciter piston is guided to be moved back and forth.
  • the guide tube 21 may be formed in two or more parts to simplify the assembly.
  • the percussion mechanism 20 defines a central striking mechanism axis S which runs centrally through the guide tube 21 and the elements (excitation element 22 etc.) moved in the guide tube 21.
  • In the guide tube 21 is still further designed as a flying piston impact element 23 axially displaceable.
  • the striking element 23 can also be displaced into an oscillating stroke movement via the exciter piston and the air spring 24 lying between it and the exciter element 22.
  • the striking element 23 strikes in the impact mode of the power tool 10 on a striker (not shown in the figures), which in turn strikes a tool (not shown in the figures). Alternatively, the striking element 23 strikes directly on the end of a tool.
  • the air spring 24 or gas spring (depending on the gas or gas mixture used) between the excitation element 22 and the striking element 23 can be switched on and off via switching means (not shown in the figures).
  • the excitation element 22 is connected to generate a lifting movement during operation of the power tool 10 with a pivotally mounted on this wobble member 29 of the wobble drive 13 (on the pivot bearing 38).
  • a pivot sleeve 28 is slidably guided, which has circumferentially a spherical shape and which is pivotally mounted in a bearing receptacle 27 in a disk-shaped lifting body 25 of the wobble drive 13.
  • the lifting body 25 in turn is along its longitudinal extent with a projection designed as a dovetail projection slidably guided in a designed as a dovetail groove guide 33 of an adjusting element 31 of a total of 30 designated adjusting device for the stroke of the excitation element 22.
  • the lifting body 25 has at its end remote from the bearing receptacle 27 an aligned transversely to its longitudinal extent slot 26 through which engages an elongated eccentric pin 18 which rotatably sits on a bearing shaft 19 together with an eccentric 17.
  • the eccentric 17 meshes with its external thread a thread of the output 15 of the motor 12.
  • Das z. B. designed as an elongate round rod wobble member 29 has at its end remote from the exciter element 22 a designed as a ball head bearing element 39 which is pivotally mounted in a trained as a socket pan bearing element 40 but axially fixed (based on its longitudinal extent).
  • a rotational movement of the motor 12 is first transmitted by this arrangement to the eccentric wheel 17 with the eccentric pin 18 (direction of rotation 16 in FIG Fig. 3 ) and then implemented via the eccentric pin 18 in the slot 26 in a linear reciprocating movement of the lifting body 25.
  • this movement is now transferred to the wobble member 29, which is set in a reciprocating pivotal movement (see., Pulled and dashed illustrated wobble member 29 in the FIGS. 1 and 2 ) and thereby pivoted at a maximum by a wobble angle alpha 1.
  • the wobble member 29 transmits this movement in turn via the pivot bearing 38 to the excitation element 22, which is displaced in a direction along the percussion axis S linear and reciprocating movement, the in Fig. 1 a maximum stroke length H1 (cf. Fig. 1 ) having.
  • the already mentioned adjusting device 30 for the stroke of the excitation element 22 has, in addition to the adjusting element 31, an actuating element 34, the z. B. is designed as knurling or thumbwheel.
  • the actuator 34 is externally accessible to the power tool 10 and is z. B. manually operated.
  • Via a rotary actuation of the actuating element 34 the adjusting element 31, which is guided displaceably on rod-shaped guide elements 32, continuously between a first, the eccentric 17 near end position (see Fig.
  • the adjustment element 31 also changes the position of the lifting body 25 along the eccentric pin 18 and along the longitudinal extension of the wobble member 29, so that the tumbling angle of the wobble member 29 is also determined by the lifting body 25 is infinitely variable. Due to the stepless adjustability of the wobble angle between a maximum wobble angle alpha_1 (see Fig. 1 ) and a minimum wobble angle alpha_2 (see Fig. 2 ) is also the maximum stroke of the excitation element 22 continuously adjustable between a maximum stroke length H1 (see Fig. 1 ) and a minimum stroke length H2 (see Fig. 2 ).
  • the adjustment of the stroke length of the excitation element 22 is possible due to the stepless adjustability even during operation of the power tool 10, so that it can be reacted directly to changes in the physical properties of the substrate to be processed or workpiece. This is z. B. then the case when drilling a hammer was first drilled with the power tool 10 and then meets the percussion drill on the lying under the plaster brick wall.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP08104150A 2007-07-19 2008-05-29 Machine-outil manuelle dotée d'une sonnette Withdrawn EP2017039A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007000391A DE102007000391A1 (de) 2007-07-19 2007-07-19 Handwerkzeugmaschine mit Schlagwerk

Publications (2)

Publication Number Publication Date
EP2017039A2 true EP2017039A2 (fr) 2009-01-21
EP2017039A3 EP2017039A3 (fr) 2012-09-05

Family

ID=39821582

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08104150A Withdrawn EP2017039A3 (fr) 2007-07-19 2008-05-29 Machine-outil manuelle dotée d'une sonnette

Country Status (4)

Country Link
US (1) US7802711B2 (fr)
EP (1) EP2017039A3 (fr)
JP (1) JP2009023085A (fr)
DE (1) DE102007000391A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8636081B2 (en) 2011-12-15 2014-01-28 Milwaukee Electric Tool Corporation Rotary hammer
JP2012223870A (ja) * 2011-04-21 2012-11-15 Makita Corp 打撃工具
DE102012206445A1 (de) * 2012-04-19 2013-10-24 Hilti Aktiengesellschaft Werkzeugmaschine
DE112013004324T5 (de) * 2012-09-03 2015-06-03 Makita Corporation Hammerwerkzeug
EP2886259A1 (fr) * 2013-12-18 2015-06-24 HILTI Aktiengesellschaft Appareil d'enfoncement
WO2019079560A1 (fr) 2017-10-20 2019-04-25 Milwaukee Electric Tool Corporation Outil à percussion
EP3743245B1 (fr) 2018-01-26 2024-04-10 Milwaukee Electric Tool Corporation Outil à percussion

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3205141A1 (de) 1982-02-13 1983-08-18 Robert Bosch Gmbh, 7000 Stuttgart Bohrhammer

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3603406A (en) * 1969-09-25 1971-09-07 Gkn Screws Fasteners Ltd Explosive operated power tool with impact and rotation
US3948051A (en) * 1974-08-01 1976-04-06 Marshall Don J Fluid pressure amplifier
US4091981A (en) * 1975-08-21 1978-05-30 Hitachi Koki Company, Limited Power driven percussion tool
DE2917475A1 (de) * 1979-04-30 1980-11-13 Hilti Ag Bohr- oder meisselhammer
DE3119956C2 (de) * 1981-05-20 1984-11-22 Joh. Friedrich Behrens AG, 2070 Ahrensburg Schallgedämpftes Eintreibgerät für Befestigungsmittel
SE436988B (sv) * 1983-07-01 1985-02-04 Nilsson Goran Alfred Anordning vid nalhacka anordning vid nalhacka
DE3502977A1 (de) * 1985-01-30 1986-07-31 Robert Bosch Gmbh, 7000 Stuttgart Druckmittelbetriebenes schlaggeraet
DE3505544A1 (de) * 1985-02-18 1986-08-21 Hilti Ag, Schaan Bohrhammer
DE4121279A1 (de) * 1991-06-27 1993-01-07 Bosch Gmbh Robert Bohr- und/oder schlaghammer
US6041603A (en) * 1997-12-31 2000-03-28 Porter-Cable Corporation Internal combustion fastener driving tool accelerator plate
USD410182S (en) * 1997-12-31 1999-05-25 Porter-Cable Corporation Internal combustion fastener driving tool
DE19856638A1 (de) * 1998-12-03 2000-06-08 Black & Decker Inc Antrieb für ein Elektrowerkzeug, insbesondere einen Bohrhammer, sowie Bohrhammer
DE102007000255A1 (de) * 2007-05-03 2008-11-06 Hilti Aktiengesellschaft Handwerkzeugmaschine mit geschmiertem Schlagwerk

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3205141A1 (de) 1982-02-13 1983-08-18 Robert Bosch Gmbh, 7000 Stuttgart Bohrhammer

Also Published As

Publication number Publication date
DE102007000391A1 (de) 2009-01-22
US20090020302A1 (en) 2009-01-22
US7802711B2 (en) 2010-09-28
EP2017039A3 (fr) 2012-09-05
JP2009023085A (ja) 2009-02-05

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