EP2231366A1 - Unité de percussion d'une machine-outil à main - Google Patents

Unité de percussion d'une machine-outil à main

Info

Publication number
EP2231366A1
EP2231366A1 EP08860234A EP08860234A EP2231366A1 EP 2231366 A1 EP2231366 A1 EP 2231366A1 EP 08860234 A EP08860234 A EP 08860234A EP 08860234 A EP08860234 A EP 08860234A EP 2231366 A1 EP2231366 A1 EP 2231366A1
Authority
EP
European Patent Office
Prior art keywords
unit
racket
piston
hand tool
unit 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Withdrawn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
EP08860234A
Other languages
German (de)
English (en)
Inventor
Martin Streichfuss
Joerg Lemmel
Thilo Henke
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 EP2231366A1 publication Critical patent/EP2231366A1/fr
Withdrawn legal-status Critical Current

Links

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
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/06—Hammer pistons; Anvils ; Guide-sleeves for pistons
    • 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
    • B25D2216/00—Details of 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
    • B25D2216/0007—Details of percussion or rotation modes
    • B25D2216/0015—Tools having a percussion-only mode
    • 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
    • B25D2217/0011—Details of anvils, guide-sleeves or pistons
    • B25D2217/0023—Pistons
    • 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
    • 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
    • B25D2250/275—Tools having at least two similar components
    • B25D2250/285—Tools having three or more similar components, e.g. three motors

Definitions

  • the invention is based on a handheld power tool percussion unit according to the preamble of claim 1.
  • the percussion unit has a guide in which a piston unit and a racket unit are accommodated reciprocatingly.
  • the piston unit and the racket unit define a compression space in which a gas volume is enclosed.
  • the racket unit is movable by means of the piston unit via the gas volume in a direction of action and acts on a firing pin.
  • the invention is based on a hand tool machine impact unit with a club unit, which can be moved in a direction of action by means of a piston unit moved in a direction of action via a gas volume.
  • the effective direction of the piston unit is unequal to the effective direction of the racket unit.
  • "effective direction of the piston unit” is to be understood as meaning, in particular, a direction in which the piston unit is moved in order to act on the racket unit, ie to give the racket unit an impulse in its direction of action a direction in which the racket unit is moved to act on a tool positioned in a tool holder, ie to give a tool a pulse in a direction of impact.
  • the separation of the two directions of action has the decisive advantage that the accelerations or acceleration forces which occur during operation of the handheld power tool, in particular caused by pistons and rams, can be aligned in such a way that they are compatible. pensieren or compensate and thus lead to a reduction of vibrations during operation of the craft machine.
  • the effective direction of the racket unit is opposite to the effective direction of the piston unit.
  • the racket is accelerated counter to the direction of movement of the piston, so that the acceleration forces that occur are aligned with each other and thereby at least partially compensate each other.
  • an axis of the effective direction of the piston unit with an axis of the direction of action of the racket unit forms an angle ⁇ .
  • the design also enables a compensation of the acceleration forces, depending on the choice of the angle.
  • the gas volume is enclosed in a compression space which comprises a single space bounded by a wall. This allows a simple and cost-effective production of a compression space, since, for example, only the sealing of a room is required.
  • the gas volume be enclosed in a compression space which comprises at least two separate, wall-bounded spaces which are interconnected via a connection channel.
  • a connection channel allows adaptation of the compression space to a limited space, as can be done via the separate rooms optimal utilization of the available space.
  • the connection channel allows a connection of the separate rooms over a longer distance.
  • a "guide” is to be understood as meaning, in particular, a means in which the racket unit or the piston unit is guided, in particular a tubular component, thereby enabling the piston, the racket unit and also the associated guides to be of a size and in their entirety Form be formed differently, which in turn an additional potential for optimization in terms of
  • the guides may, for example, have different diameters for optimizing the movements of piston and racket. In particular, an optimal adaptation of the occurring forces and accelerations can take place, for example, by a variation of the piston mass. It is also proposed that the guides are provided in the single room.
  • the term "provided” should be understood to mean in particular specially arranged and / or formed, which results in a constructively simple and thus cost-effective design of the striking mechanism unit.
  • the guidance of the racket unit be arranged in the wall of the individual room and the guidance of the piston unit within the individual room.
  • the walls of the separate spaces are designed as guides.
  • the integration of the guides in the walls allows a waiver of additional components and thus a reduction in costs.
  • the hand-held power tool impact unit comprises at least one control opening which is provided for controlling the gas volume and is coupled to a machine room.
  • the term "coupled” should be understood to mean, in particular, a fluidic coupling so that the gas of the gas volume flows into the engine room via the control port and / or the gas volume can be fed with gas from the engine room.
  • engine room should be understood in particular to mean a gear compartment, a lubricating oil space, an engine compartment, etc., and / or in particular a space which is at least in one respect sealed off to the outside, ie to a handheld machine tool environment, and for example at least substantially only
  • a corresponding design at least one direct gas exchange between the gas volume and the handheld power tool environment and the resulting loss of comfort as well as environmental pollution can be avoided.
  • FIG. 1 is a schematic diagram of a hand tool with a partial section through a percussion mechanism according to a first embodiment
  • Fig. 2 shows the hammer mechanism partially shown according to a second embodiment.
  • the handheld power tool impact unit comprises a racket unit 10, which can be moved by means of a piston unit 14 which is moved in an effective direction 12 via a gas volume 16 into an effective direction 18.
  • the racket unit 10 has a racket 48, which is accommodated in a guide 40 extending along an axis 22 of the effective direction 18 of the racket unit 10.
  • the piston unit 14 has a piston 50 which is accommodated in a guide 42 extending along an axis 20 of the effective direction 12 of the piston unit 14.
  • the racket 48 and the piston 50 are guided in the respective guides 40, 42 bidirectionally displaceable.
  • the axis 22 of the guide 40 of the racket 48 is aligned with the axis of a tool holder 52, in which a tool 54 is receivable.
  • the piston 50 acts in the direction of action 12 on the racket 48, i. the piston 50 gives the beater 48 a pulse in its direction of action 18. This results in a movement of the beater 48 in the direction of the tool 54 or in the direction of a firing pin caused by the piston 50
  • a first end face 60 of the piston 50 of the piston unit 14 and a first end face 62 of the racket 48 of the racket unit 10 define a compression space 24 in which the gas volume 16 is enclosed.
  • the piston 50 Via a drive 64, the piston 50 is displaced from a starting position into a reciprocating, axial stroke movement in the guide 42, wherein the gas volume 16 in the compression space 24 is alternately compressed and relaxed.
  • the beater 48 is accelerated by the compression pressure in its guide 40 in the direction of action 18 and gives its energy via the firing pin 56 to the tool 54 or initiates an impulse to the tool holder 52 positioned in the tool 54 a.
  • Piston 50 implemented. As the piston 50 moves forward, there is an overpressure between the piston 50 and the beater 48, which accelerates the beater 48 forward. The forward flying club 48 strikes the firing pin 56 and releases its kinetic energy or impact energy. The pulse of the racket 48 is transmitted from the firing pin 56 to the tool 54. During the backward movement of the piston 50 creates a negative pressure, which pulls the racket 48 to the rear.
  • the effective direction 12 of the piston unit 14 is unequal to the effective direction 18 of the hammer unit 10. This means that the piston 50 and the bat 48 are accelerated in different directions 12, 18.
  • the effective direction 18 of the racket unit 10 is opposite to the direction of action 12 of the piston unit 14, i. the beater 48 is accelerated counter to the direction of movement 12 of the piston 50.
  • the compression space 24 includes a single space 28 bounded by a wall 26.
  • the guides 40, 42 of the racket unit 10 and the piston unit 14 are provided in the single space 28 by arranging the guide 40 of the racket unit 10 in the wall 26 of the single space 28 and the guide 42 of the piston unit 14 within the single space 28, wherein the guide 40 of the racket unit 10 is preferably integrated in the wall 26.
  • a control opening 44 is introduced, which is provided for controlling the gas volume 16 and coupled to a machine room 46.
  • an axis 20 'of the effective direction 12' of the piston unit 14 ' encloses an angle ⁇ with an axis 22' of the effective direction 18 'of the racket unit 10'.
  • the compression space 24 ' comprises two separate spaces 34' and 36 'delimited by walls 30', 32 ', which are connected to one another via a connecting channel 38'.
  • a guide 40 ', 42' is provided in each case in a separate space 34 ', 36', ie racket 48 'and piston 50' are spatially separated.
  • the walls 30 ', 32' of the separate spaces 34 ', 36' as guides 40 ', 42' educated.
  • a drive of the racket with two separate pistons is possible, which can be arbitrarily oriented to each other.

Landscapes

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

Abstract

L'invention concerne une unité de percussion d'une machine-outil à main, avec un ensemble frappeur (10) qui, au moyen d'un ensemble piston (14) déplacé dans une direction d'action (12), peut être déplacé par l'intermédiaire d'un volume de gaz (16) dans une direction d'action (18). Selon l'invention, la direction d'action (12) de l'ensemble piston (14) est différente de la direction d'action (18) de l'ensemble frappeur (10).
EP08860234A 2007-12-12 2008-10-16 Unité de percussion d'une machine-outil à main Withdrawn EP2231366A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200710059896 DE102007059896A1 (de) 2007-12-12 2007-12-12 Handwerkzeugmaschinenschlagwerkeinheit
PCT/EP2008/063920 WO2009074383A1 (fr) 2007-12-12 2008-10-16 Unité de percussion d'une machine-outil à main

Publications (1)

Publication Number Publication Date
EP2231366A1 true EP2231366A1 (fr) 2010-09-29

Family

ID=40239645

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08860234A Withdrawn EP2231366A1 (fr) 2007-12-12 2008-10-16 Unité de percussion d'une machine-outil à main

Country Status (3)

Country Link
EP (1) EP2231366A1 (fr)
DE (1) DE102007059896A1 (fr)
WO (1) WO2009074383A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012223870A (ja) * 2011-04-21 2012-11-15 Makita Corp 打撃工具

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1196040A (en) * 1913-02-25 1916-08-29 smith
FR616408A (fr) * 1925-05-22 1927-02-02 Outil de percussion
US1959458A (en) * 1928-03-19 1934-05-22 Christiansen Heinrich Tamping device for railway sleepers
JPS519938B2 (fr) * 1971-09-23 1976-03-31
DE19810088C1 (de) 1998-03-10 1999-08-26 Bosch Gmbh Robert Bohr- und/oder Schlaghammer mit in Abhängigkeit von der Einstecktiefe eines Werkzeuges aktivierbarem Schlagwerk
DE102005019710A1 (de) * 2005-04-28 2006-11-09 Robert Bosch Gmbh Handwerkzeugmaschinenschlagwerkeinheit

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009074383A1 *

Also Published As

Publication number Publication date
WO2009074383A1 (fr) 2009-06-18
DE102007059896A1 (de) 2009-06-18

Similar Documents

Publication Publication Date Title
DE102004060852B4 (de) Schlagwerkzeug
DE3405922A1 (de) Handwerkzeugmaschine, insbesondere bohr- oder schlaghammer
EP2176036B1 (fr) Machine-outil portative comprenant une unité ressort
DE102009026542A1 (de) Werkzeugmaschine
DE102011078628A1 (de) chlagwerkvorrichtung
EP1716979A1 (fr) Marteau perforateur ou marteau-burineur
DE102006059076A1 (de) Schlagwerk einer Elektrohandwerkzeugmaschine
DE102005019710A1 (de) Handwerkzeugmaschinenschlagwerkeinheit
DE102008001957A1 (de) Bohr- und/oder Meißelhammer
EP1965951B1 (fr) Machine-outil portable, en particulier marteau perforateur et/ou burineur
DE102005019711A1 (de) Handwerkzeugmaschinenschlagwerkeinheit
EP3389932B1 (fr) Machine-outil portative a percussion
WO2008006634A1 (fr) Outil électroportatif muni d'un groupe de percussion
DE102012214938B4 (de) Getriebeanordnung für eine angetriebene Werkzeugmaschine sowie Werkzeugmaschine mit einer solchen Getriebeanordnung
EP3389934B1 (fr) Machine-outil portative a percussion
DE102007062246A1 (de) Handwerkzeugmaschine
DE102010001683A1 (de) Handwerkzeugmaschinenvorrichtung
EP2231366A1 (fr) Unité de percussion d'une machine-outil à main
WO2002092291A1 (fr) Machine-outil manuelle
DE102009002238A1 (de) Schlagsteuerungsvorrichtung
EP2451615A1 (fr) Appareil de perforation pneumatique et/ou de burinage
EP3274132B1 (fr) Machine-outil portative
DE102008022455A1 (de) Bohrhammer
EP3496901B1 (fr) Machine-outil portative
DE102013211232A1 (de) Schlagwerkvorrichtung

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20100712

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA MK RS

DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20130503