EP1834737A1 - Outil à main électrique - Google Patents

Outil à main électrique Download PDF

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Publication number
EP1834737A1
EP1834737A1 EP06005590A EP06005590A EP1834737A1 EP 1834737 A1 EP1834737 A1 EP 1834737A1 EP 06005590 A EP06005590 A EP 06005590A EP 06005590 A EP06005590 A EP 06005590A EP 1834737 A1 EP1834737 A1 EP 1834737A1
Authority
EP
European Patent Office
Prior art keywords
spindle
racket
hand tool
electric hand
spring
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Withdrawn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
EP06005590A
Other languages
German (de)
English (en)
Inventor
Günter Stark
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.)
Metabowerke GmbH and Co
Original Assignee
Metabowerke GmbH and Co
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 Metabowerke GmbH and Co filed Critical Metabowerke GmbH and Co
Priority to EP06005590A priority Critical patent/EP1834737A1/fr
Publication of EP1834737A1 publication Critical patent/EP1834737A1/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Withdrawn legal-status Critical Current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
    • B25D11/005—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
    • B25D11/10—Means for driving the impulse member comprising a cam mechanism
    • B25D11/102—Means for driving the impulse member comprising a cam mechanism the rotating axis of the cam member being coaxial with the axis of the tool
    • B25D11/106—Means for driving the impulse member comprising a cam mechanism the rotating axis of the cam member being coaxial with the axis of the tool cam member and cam follower having the same shape
    • 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
    • B25D2216/0023—Tools having a percussion-and-rotation mode
    • 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
    • B25D2216/0038—Tools having a rotation-only mode
    • 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
    • B25D2250/005—Adjustable tool components; Adjustable parameters
    • B25D2250/021—Stroke length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/121—Housing details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/371—Use of springs

Definitions

  • the invention relates to an electric hand tool device comprising a spindle, which can be driven in rotation by a motor and can be connected at one end to a tool holder, and a striking mechanism for axially moving the spindle,
  • Such electric hand tools are known on the one hand as rotary hammers, on the other hand as impact drills. It is provided in impact drills that two detent discs are engageable with each other and can be generated by the locking of the detent discs axial movements of the drill spindle. This has a high volume and high acceleration values when pressing the device to the detriment. Furthermore, it is also necessary to press the drill with high force to the Impact power on the building or the component to be drilled to transfer.
  • a percussion drill is for example from the DE 197 50 288 A1 discloses a percussion drill disclosed, however, which is relatively complicated, in particular, since the intermeshing cams are arranged on two different shafts.
  • Another hammer drill is for example from the DE 29 28 575 previously known, the percussion here includes a variety of parts and requires a large amount of space. However, the space in hand tools is usually very limited.
  • Another hammer drill is for example from the EP 0 145 070 A2 known, with the Schlagtechnik occupies a large space here, too.
  • the invention is an object of the invention to provide a generic electric hand tool with a percussion, in which the necessary space compared to a hammer is reduced as possible and at the same time only a small contact force in the operation of the electric hand tool against the required contact pressure of a percussion drill is necessary.
  • the hammer mechanism comprises a first control cam comprehensive component which is rotatably and axially immovably connected to the spindle, and a cooperating with the first control cam in a striking operation second control cam racquets , wherein the racket is arranged only translationally axially displaceable coaxial with the spindle on this and is biased by a spring in the direction of the first control cam having component.
  • Such a configuration has the advantage of requiring only a small space, since the percussion is completely on or around the work spindle, which is connectable to the tool holder, is arranged.
  • a further parallel thereto extending shaft, which is arranged in particular axially parallel to the spindle, does not have to be provided.
  • the design offers the advantages that are often provided in a percussion drill.
  • a corresponding electric hand tool also offers the advantages of a hammer drill, in which only a small contact force is necessary because of the interaction of the two cams Racket is accelerated against the component connected to the spindle and thus strikes against this and thereby moves the spindle axially. In this way, the considerable expenditure of force, as is necessary in impact drills, can be significantly reduced.
  • At least one cam is provided, in particular more than one cam and valleys arranged therebetween may be provided, wherein the at least arranged on a cam cam biases the spring of the racket by the racket is moved counter to the direction of the component of the first cam and so energy is stored in the spring. After overcoming the cams, the energy stored in the spring then suddenly relaxes, so that the racket strikes the component with the appropriate force and speed and moves it and thus also the spindle in the axial direction, so that it strikes the material to be processed becomes.
  • the component is fixed by means of press fit on the spindle.
  • the component and the spindle are integrally connected to each other.
  • the spindle is axially displaceable from a first impact operating position, in which the control cams are in engagement with each other, and a second position in which control cams are not in engagement with each other.
  • This second position is a normal drilling operation, ie a rotational driving of the spindle without axial displacement of the same possible.
  • the engagement of the two cams into each other can take place on the one hand by a switching operation of an operator on the machine, in which the cams are brought closer together, and also alternatively or additionally by the force with which the machine to a workpiece to be machined, for example a Wall, is pressed, can be generated, whereby the spindle can be axially displaced in the direction of the racket, until the two cams are engaged with each other.
  • the spring may in particular be a helical spring which is arranged coaxially around the spindle.
  • the spring and the racket are arranged and guided in a housing-fixed racket housing.
  • the racket housing can be designed in particular so that a radial tilting of the racket and the spring is largely avoided, which on the one hand increased wear of the machine and on the other hand a lower energy storage in the spring would allow.
  • the racket may be guided in the racket housing via an axial groove / spring connection.
  • the racket in the racket housing via an axial ball guide can be axially displaceable.
  • Figure 1 shows a portion of an electric hand tool device comprising a spindle 10 with a receptacle 12 for a tool holder, wherein the spindle via a gear 14 and an electric motor connected thereto (not shown) can be driven.
  • the spindle is rotatably mounted in a machine housing 16 by means of the bearings 18, 20 and 22nd
  • the electric hand tool device now comprises a striking mechanism, which is provided in its entirety by the reference numeral 24!
  • the hammer mechanism 24 in this case has essentially two elements, namely the component 26 with a first control cam 28 and a racket 30 with a second control curve 32.
  • the two control cams 28 and 32 of the components 26 and 30 are directed towards each other.
  • the component 26 is in this case pressed onto the spindle 10 and is in the axial direction against a stop 34.
  • the component 26 rotates with the spindle and is axially fixed on this.
  • the racket is axially movable relative to the spindle 10, but can not rotate relative to the housing 16.
  • the racket 30 is guided in a racket housing 36, which is inserted into the machine housing 16 and fixed here, wherein the lateral surface 38 of the racket along the inner wall of the racket housing 36 is slidable.
  • a spring 40 is also guided, which is supported with its one side against the racket 30 and with its other side against the racket housing 36 and in this case is arranged coaxially around the spindle.
  • the spring 40 is at least partially disposed in a recess of the racket 30, wherein the control cam 32 facing away from the end of the racket 30, which is here designated 42, serves as a theoretical stop, and the farthest deflection of the racket 30 by the abutment of the end 42nd would be limited to the interior of the racket housing 36. In practice, this attack is without relevance.
  • Figure 1 shows an embodiment in which the control cams 28 and 32 are not engaged with each other. In this position, only a rotational movement of a tool clamped in a tool holder takes place without any axial impact movement of the spindle 10 being performed.
  • the cams are designed so that at least one of the control cams has a control cam, which protrudes in the direction of the other control cam in the axial direction over the rest of the control cam.
  • ramps are provided, which is a gliding of the two Allow cams on each other and thus allow a locking of the provided on one or both of the control cams control cam. Between the two control cam so-called valleys are arranged in each case.
  • the racket 30 strikes with a predetermined energy to the component 26 and moves it in the axial direction in the direction of the end 12 of the spindle 10. Since the component 26 is fixed to the spindle 10 and in particular abuts against the stop 34 is moved together with the component 26, the spindle 10 in the axial direction. In this way, a stroke of the spindle and a percussion drilling operation can be provided, which supports a drilling operation.
  • a hammer-operated electric hand tool device which has the advantages of a percussion drill, namely a smaller space requirement, by arranging the percussion mechanism 24 coaxial with the spindle 10, the percussion mechanism 24 being arranged on or around the spindle 10, with the advantages of a hammer drill, in which the impact force is independent of the force applied to the tool by an operator.
  • a percussion drill in which two notched discs overlap each other, lower and above all less high-frequency vibrations are generated. These are perceived by an operator in particular as unpleasant.
  • the single impact strength can be improved compared to a percussion drill. In contrast to a hammer drill but the parts cost is significantly reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling And Boring (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP06005590A 2006-03-18 2006-03-18 Outil à main électrique Withdrawn EP1834737A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06005590A EP1834737A1 (fr) 2006-03-18 2006-03-18 Outil à main électrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06005590A EP1834737A1 (fr) 2006-03-18 2006-03-18 Outil à main électrique

Publications (1)

Publication Number Publication Date
EP1834737A1 true EP1834737A1 (fr) 2007-09-19

Family

ID=36764972

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06005590A Withdrawn EP1834737A1 (fr) 2006-03-18 2006-03-18 Outil à main électrique

Country Status (1)

Country Link
EP (1) EP1834737A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012072327A1 (fr) * 2010-11-29 2012-06-07 Robert Bosch Gmbh Mécanisme de percussion à marteau
WO2012072328A1 (fr) * 2010-11-29 2012-06-07 Robert Bosch Gmbh Mécanisme de percussion à marteau
WO2018055639A1 (fr) 2016-09-20 2018-03-29 Chhatrala Pankajkumar Marteau à impact automatique pour retirer des implants orthopédiques

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2928575A1 (de) * 1979-07-14 1981-01-29 Bosch Gmbh Robert Handwerkzeugmaschine, vorzugsweise bohrhammer
EP0051923A1 (fr) * 1980-11-11 1982-05-19 Kango Wolf Power Tools Limited Perceuse portative
JPH03136710A (ja) * 1989-10-20 1991-06-11 Japan Storage Battery Co Ltd 電動回転工具
US5711379A (en) * 1995-05-29 1998-01-27 Makita Corporation Hammer drill
US20050194164A1 (en) * 2004-03-05 2005-09-08 Hitachi Koki Co., Ltd. Impact drill
GB2413105A (en) * 2004-04-14 2005-10-19 Bosch Gmbh Robert Percussion mechanism with impulse force opposite to working direction

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2928575A1 (de) * 1979-07-14 1981-01-29 Bosch Gmbh Robert Handwerkzeugmaschine, vorzugsweise bohrhammer
EP0051923A1 (fr) * 1980-11-11 1982-05-19 Kango Wolf Power Tools Limited Perceuse portative
JPH03136710A (ja) * 1989-10-20 1991-06-11 Japan Storage Battery Co Ltd 電動回転工具
US5711379A (en) * 1995-05-29 1998-01-27 Makita Corporation Hammer drill
US20050194164A1 (en) * 2004-03-05 2005-09-08 Hitachi Koki Co., Ltd. Impact drill
GB2413105A (en) * 2004-04-14 2005-10-19 Bosch Gmbh Robert Percussion mechanism with impulse force opposite to working direction

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 015, no. 350 (M - 1154) 5 September 1991 (1991-09-05) *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012072327A1 (fr) * 2010-11-29 2012-06-07 Robert Bosch Gmbh Mécanisme de percussion à marteau
WO2012072328A1 (fr) * 2010-11-29 2012-06-07 Robert Bosch Gmbh Mécanisme de percussion à marteau
CN103221184A (zh) * 2010-11-29 2013-07-24 罗伯特·博世有限公司 锤击机构
US9434059B2 (en) 2010-11-29 2016-09-06 Robert Bosch Gmbh Hammer mechanism
US9636814B2 (en) 2010-11-29 2017-05-02 Robert Bosch Gmbh Hammer mechanism
WO2018055639A1 (fr) 2016-09-20 2018-03-29 Chhatrala Pankajkumar Marteau à impact automatique pour retirer des implants orthopédiques
EP3515370A4 (fr) * 2016-09-20 2020-05-20 Chhatrala, Pankajkumar K. Marteau à impact automatique pour retirer des implants orthopédiques

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