EP1949992A1 - Marteau perforateur électrique ou perceuse électrique à percussion - Google Patents

Marteau perforateur électrique ou perceuse électrique à percussion Download PDF

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Publication number
EP1949992A1
EP1949992A1 EP07001555A EP07001555A EP1949992A1 EP 1949992 A1 EP1949992 A1 EP 1949992A1 EP 07001555 A EP07001555 A EP 07001555A EP 07001555 A EP07001555 A EP 07001555A EP 1949992 A1 EP1949992 A1 EP 1949992A1
Authority
EP
European Patent Office
Prior art keywords
drive
sleeve
exciter
exciter sleeve
drive shaft
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.)
Granted
Application number
EP07001555A
Other languages
German (de)
English (en)
Other versions
EP1949992B1 (fr
Inventor
Ralf Ott
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 EP07001555A priority Critical patent/EP1949992B1/fr
Priority to DE502007003926T priority patent/DE502007003926D1/de
Priority to AT07001555T priority patent/ATE468935T1/de
Publication of EP1949992A1 publication Critical patent/EP1949992A1/fr
Application granted granted Critical
Publication of EP1949992B1 publication Critical patent/EP1949992B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/351—Use of pins

Definitions

  • the invention relates to a power driven rotary hammer or chisel hammer, with a percussion mechanism with a translationally movable in a longitudinal direction and forth exciter sleeve and a shock from the exciter sleeve and in the exciter sleeve (8) in the longitudinal direction translationally reciprocally movable racket, and with a drive device for the exciter sleeve, wherein the drive device comprises a drive shaft running perpendicular to the longitudinal direction and a drive pin articulated eccentrically to the longitudinal axis of this drive shaft, which acts on the exciter sleeve and converts the rotary movement of the drive shaft into a translatory drive movement for the exciter sleeve.
  • the invention relates to a striking mechanism as a component of an aforementioned hammer drill or chisel hammer.
  • non-generic rotary hammers have become known in which a technically complex and costly swash plate drive member is used ( EP 0 135 654 A1 ).
  • a hammer drill of the type mentioned is known from EP 1 674 205 A1 and shows a drive device for the exciter sleeve, which manages without a swash plate.
  • the exciter sleeve is not only translationally reciprocated in the longitudinal direction, but is also subjected to rotational movement about the longitudinal direction (back and forth). It must therefore be taken complicated measures with regard to the design of the outer periphery of the exciter sleeve and the lubrication of this tribological system, which is considered disadvantageous.
  • the present invention has for its object to improve a rotary hammer or chisel hammer of the type described above in view of the problems associated with the rotational movement of the exciter sleeve problems.
  • the drive pin thus basically performs the same movements as a result of its eccentric so eccentric articulated arrangement relative to the drive axle as in the prior art EP 1 674 205 A1 ,
  • the coupling between the drive pin and exciter sleeve of the impact mechanism is modified according to the invention such that the excitation sleeve does not participate in the pivotal movement of the drive pin in the plane perpendicular to the longitudinal direction, ie about the longitudinal axis.
  • the power tool or percussion mechanism is configured such that the drive pin protrudes in the direction of the drive shaft into an opening in the excitation sleeve or projects through an opening in the exciter sleeve, wherein the opening is such that the drive pin substantially therein only in one plane can tilt perpendicular to the longitudinal direction. Due to this Verkippbarheit in said plane germ torque is transmitted to the exciter sleeve so that it is not rotated around its longitudinal direction back and forth.
  • the drive pin is connected via a ball joint or spherical bearing with the exciter sleeve and means are provided which allow the drive pin to pivot substantially only in a plane enclosing the longitudinal direction with respect to the exciter sleeve.
  • the said means which could also be referred to as a forced guiding means, can be provided in an advantageous manner between the ball joint or the spherical bearing and the drive axle.
  • said means are provided at least almost adjacent to the exciter sleeve or to the opening or recess adjacent to the exciter sleeve.
  • these means are formed by an outer bearing shell of the ball joint or the spherical bearing, which supports the compactness of the design and locates the positive guidance means close to the exciter sleeve.
  • an outer bearing shell of the ball joint or spherical bearing is viewed in section L-shaped, wherein the short leg of the L-shape forms a means which the drive pin substantially only in a perpendicular to Longitudinally extended plane with respect to the exciter sleeve can pivot.
  • the drive pin is provided off-center to the drive shaft in an end face of a flange-shaped extension in the drive shaft.
  • the drive pin loose in an opening in the drive shaft is inserted in particular in the flange-shaped extension and is secured by a stop means against falling out.
  • a stop means is provided against falling out, the articulated connection between the drive pin and drive shaft can be made very simple and therefore advantageous. It may, for example, be a non-intrusive plug-in connection.
  • the stop means is formed by a radially projecting collar on the drive pin, which can be applied against the exciter sleeve or the ball joint or the spherical bearing.
  • the figures show a generally designated by the reference numeral 2 percussion for a hammer drill or chisel hammer drive spindle 4 and the percussion bearing or holding components, which are to represent schematically associated with the housing of the drill or chisel carrying parts 6, but only symbolically indicated are.
  • the percussion mechanism comprises an exciter sleeve 8, which is translationally reciprocable in a longitudinal direction 10 of the drive spindle 4 and of the tool device.
  • This drive device 16 includes a drive shaft 18 extending perpendicular to the longitudinal direction 10 and a drive pin 20 eccentrically with respect to a longitudinal axis 22 of the drive shaft 18, but eccentric with the drive shaft 18 via a Joint 24 is connected.
  • the drive shaft 18 includes a flange-shaped extension 26, in whose end face 28 a recess 30 is formed is, in which the drive pin 20 engages with a rounded head 32 and is pivotally movable in all orientations.
  • the drive pin 20 extends through the other end an opening 34 of a projection 36 of the exciter sleeve 8.
  • a ball joint or spherical bearing 38 through which the drive pin 20 is mounted.
  • the ball joint or spherical bearing 38 comprises a ball 39 with a cylindrical passage opening through which the drive pin 20 passes.
  • the ball joint or spherical bearing 38 would in itself allow a pivoting of the drive pin 20 with respect to all levels.
  • means 40 are provided, which the drive pin 20 substantially only in one of the 'longitudinal direction 10 enclosing plane (perpendicular to the plane of the drawing FIG. 3 ) with respect to the exciter sleeve 8 can pivot.
  • These means 40 are formed in the case exemplified by an outer bearing shell 42 of the ball joint or spherical bearing 38.
  • This outer bearing shell 42 is in the illustration of FIG. 3 L-shaped, wherein the short leg of the L-shape forms the means 40.
  • the short leg of the L-shape extends to at least almost to the outer surface of the drive pin 20 and prevents pivoting of the drive pin 20 in a longitudinal direction 10 enclosing plane (the plane of the drawing FIG. 3 ). In this way, upon rotation of the drive shaft 18, the rotational movement of the drive shaft 18 is converted into a translational reciprocating movement of the exciter sleeve 8 in the longitudinal direction 10.
  • the exciter sleeve 8 performs substantially no rotational movement, it is understood here that the exciter sleeve upon rotation of the drive shaft 18, so when switching the percussion mechanism 2 by less than 5 ° in one or the other direction to the Longitudinal direction 10 is rotated; preferably, it is rotated less than 3 ° and more preferably less than 2 ° back and forth (the angle of the pivoting segment would then be twice as large).
  • the drive pin 20 further has a radial collar 41, which serves as a stop means 43 with respect to the exciter sleeve 8 or in the case shown here with respect to the outer bearing shell 42. In this way, the drive pin 20 only loosely inserted into the recess 30 in the end face 28 of the flange-shaped extension 26 of the drive shaft 18; he is then held captive.
  • FIG. 2 From the top view in FIG. 2 and also out FIG. 3 can be seen two opposite recesses 44 in the outer Bearing shells 42, through which the top and bottom flattened ball of the ball joint or spherical bearing 38 can be inserted into the bearing shell 42.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Drilling And Boring (AREA)
  • Crushing And Pulverization Processes (AREA)
EP07001555A 2007-01-25 2007-01-25 Dispositif de percussion pour un marteau-perforateur ou une marteau-piqueur; marteau-perforateur ou marteau-piqueur Not-in-force EP1949992B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP07001555A EP1949992B1 (fr) 2007-01-25 2007-01-25 Dispositif de percussion pour un marteau-perforateur ou une marteau-piqueur; marteau-perforateur ou marteau-piqueur
DE502007003926T DE502007003926D1 (de) 2007-01-25 2007-01-25 Schlagwerk für einen Bohr- oder Meißelhammer; Bohr- oder Meißelhammer
AT07001555T ATE468935T1 (de) 2007-01-25 2007-01-25 SCHLAGWERK FÜR EINEN BOHR- ODER MEIßELHAMMER; BOHR- ODER MEIßELHAMMER

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07001555A EP1949992B1 (fr) 2007-01-25 2007-01-25 Dispositif de percussion pour un marteau-perforateur ou une marteau-piqueur; marteau-perforateur ou marteau-piqueur

Publications (2)

Publication Number Publication Date
EP1949992A1 true EP1949992A1 (fr) 2008-07-30
EP1949992B1 EP1949992B1 (fr) 2010-05-26

Family

ID=38080982

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07001555A Not-in-force EP1949992B1 (fr) 2007-01-25 2007-01-25 Dispositif de percussion pour un marteau-perforateur ou une marteau-piqueur; marteau-perforateur ou marteau-piqueur

Country Status (3)

Country Link
EP (1) EP1949992B1 (fr)
AT (1) ATE468935T1 (fr)
DE (1) DE502007003926D1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2038986A (en) * 1978-12-13 1980-07-30 Black & Decker Inc Converting rotary motion to reciprocatory motion
EP0135654A1 (fr) * 1983-09-29 1985-04-03 Licentia Patent-Verwaltungs-GmbH Guidage du piston d'une perforatrice à coussin d'air
WO1996005031A1 (fr) * 1994-08-17 1996-02-22 Ryobi Motor Products Corporation Mecanisme d'entrainement de scie a mouvement de va-et-vient
EP1674205A1 (fr) * 2004-12-23 2006-06-28 BLACK & DECKER INC. Mécanisme d'entraînement pour outil motorisé
EP1674206A1 (fr) * 2004-12-23 2006-06-28 BLACK & DECKER INC. Mécanisme de percussion d'un marteau à percussion à moteur

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2038986A (en) * 1978-12-13 1980-07-30 Black & Decker Inc Converting rotary motion to reciprocatory motion
EP0135654A1 (fr) * 1983-09-29 1985-04-03 Licentia Patent-Verwaltungs-GmbH Guidage du piston d'une perforatrice à coussin d'air
WO1996005031A1 (fr) * 1994-08-17 1996-02-22 Ryobi Motor Products Corporation Mecanisme d'entrainement de scie a mouvement de va-et-vient
EP1674205A1 (fr) * 2004-12-23 2006-06-28 BLACK & DECKER INC. Mécanisme d'entraînement pour outil motorisé
EP1674206A1 (fr) * 2004-12-23 2006-06-28 BLACK & DECKER INC. Mécanisme de percussion d'un marteau à percussion à moteur

Also Published As

Publication number Publication date
EP1949992B1 (fr) 2010-05-26
ATE468935T1 (de) 2010-06-15
DE502007003926D1 (de) 2010-07-08

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