EP0589267A2 - Marteau de frappe et/ou de forage - Google Patents

Marteau de frappe et/ou de forage Download PDF

Info

Publication number
EP0589267A2
EP0589267A2 EP93114210A EP93114210A EP0589267A2 EP 0589267 A2 EP0589267 A2 EP 0589267A2 EP 93114210 A EP93114210 A EP 93114210A EP 93114210 A EP93114210 A EP 93114210A EP 0589267 A2 EP0589267 A2 EP 0589267A2
Authority
EP
European Patent Office
Prior art keywords
eccentric
shaft
drive member
hammer
fork
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
EP93114210A
Other languages
German (de)
English (en)
Other versions
EP0589267B1 (fr
EP0589267A3 (en
Inventor
Wolfgang Dipl.-Ing. Schmid
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 EP0589267A2 publication Critical patent/EP0589267A2/fr
Publication of EP0589267A3 publication Critical patent/EP0589267A3/de
Application granted granted Critical
Publication of EP0589267B1 publication Critical patent/EP0589267B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • B25D2211/06—Means for driving the impulse member
    • B25D2211/061—Swash-plate actuated impulse-driving mechanisms

Definitions

  • the invention is based on a hammer drill and / or percussion hammer according to the preamble of claim 1.
  • DE 41 21 279 A1 already discloses such a device in which the percussion mechanism is coupled to the idle device controlled by the tool via a claw coupling. A fixed part is connected to a rotating part via the claw coupling, which leads to wear and increased working noise.
  • the hammer and / or percussion hammer according to the invention with the characterizing features of claim 1 has the advantage that the coupling of the percussion mechanism is smooth, without wear and noise.
  • the clutch is also simple and inexpensive to manufacture.
  • the coupling fork can be continued in one piece up to the racket and thus serves to dampen the striking mechanism.
  • Figure 1 shows a longitudinal section through a known hammer drill.
  • Figure 2 shows in detail a hammer mechanism of a rotary hammer according to the invention.
  • FIG. 1 a housing 2 with a motor 3 installed at the rear of an already known rotary hammer is shown.
  • This drives a shaft 4, via which an impact mechanism 5 and a tool holder 6 located at the front are further driven.
  • a drive member 7 for the striking mechanism 5 is arranged on the shaft 4.
  • This has an eccentric 8, which consists of a sleeve pushed onto the shaft 4, the wall thickness of which continuously increases and decreases over the course of 360 °.
  • the outer circumference of the eccentric 8 forms an eccentric cam track 9 with respect to the shaft 4.
  • the eccentric 8 is enclosed by a needle bearing 10, the outer ring of which is formed by a joint sleeve 11. This carries a downward extension 12 in which there is an opening 13.
  • An elastically flexible driver member 15 mounted in the housing 2 cooperates with the drive member 7. It can be tilted about an axis 16 fixed to the housing.
  • An eyelet 17 is formed around the axis 16.
  • Axis 16 and eyelet 17 form a hinge 18.
  • a lever 19 extends away from the eyelet 17 towards the articulation sleeve 11 and passes through the opening 13.
  • the eyelet 17 extends away a two-leg bracket 20, which is closed at its end 21 like a loop and is articulated with play between two frets 22, 23 of a racket 24.
  • a line which is extended in a straight line away from the stirrup end 21 onto the axis 16 intersects the center line of the axis 16.
  • the striker 24 extends longitudinally in the axial direction of a tool 25 inserted into the tool holder 6 and is mounted in a longitudinal guide 26.
  • An O-ring 27 is inserted into the longitudinal guide and has a damping effect on the racket and prevents the racket 24 from moving automatically.
  • An intermediate striker 28 is arranged between the striker 24 and the tool 25.
  • the driver member 15 is designed and mounted so that the bearing 10 is only loaded radially in a design manner. In particular, the return force of the racket 24 acting transversely to the driver member is absorbed and damped by the elastic driver member 15 itself.
  • the tool holder 6 is driven via the shaft 4, which at the end has a toothing 29, and a toothed wheel 30 engaging in it.
  • the gear wheel is firmly connected to an axially limitedly movable hammer tube 31 surrounding the striking mechanism 5.
  • a continuously rotating, axially displaceable coupling part 32 also engages in the toothing 29 and can be coupled to the eccentric 8 via claws for engaging the striking mechanism.
  • the Coupling parts 8/32 are held apart by a compression spring 35. Only when the gear 30 together with the hammer tube is pressed against the coupling part 32 by the tool 25 pressed against a workpiece, does the coupling 8/32 close, so that the drive member 7 now rotates with the shaft 4 and the striking mechanism 5 is started .
  • the invention differs from the hammer drill shown in FIG. 1 by an improved design of the coupling between shaft 4 and drive member 7, which is shown in FIG. Parts that are functionally identical to those in FIG. 1 are generally provided with reference numbers increased by 100.
  • the rear motor 103 drives a two-part shaft 104 for assembly reasons, on which a drive member 107 belonging to the striking mechanism 105 is seated axially displaceably and in a rotationally locking manner.
  • An eccentric 108 is integrally connected to the drive member 107 and forms a curved path 109 on the circumference.
  • a bearing 110 with a laterally chamfered outer ring 111 is mounted on this.
  • the fork 112 On the outer ring 111 is a two-part elastic fork 112 with its arms 113 and 114 from two sides.
  • the fork 112 can also be formed in one piece. Its largest inner radius is at least as large as the largest radius of the eccentric 108 or the bearing outer ring 111.
  • the fork 112 is connected to a driver member 115 and is pivotable together with the latter about a tilt axis 116.
  • the arms 113, 114 continue along a bracket 120 of the driver member 115 and engage together with this in a recess 122 of a racket 124.
  • the arms 113, 114 of the fork 112 thus serve at the same time to cushion and dampen the coupling of the driver member 115 to the racket 124.
  • the bat 124 acts on a likewise axially movably mounted spindle 131, with which a tool holder, not shown, can be connected.
  • the spindle 131 carries a gear 130 which is firmly connected to it and which engages in a longitudinal toothing 129 on the shaft 104.
  • the longitudinal teeth are so long that both the gear 130 and the drive member 107 remain in engagement in each axial position of the spindle 131.
  • a gear lever 137 for striking mechanism shutdown engages on gear 130 on the racket side opposite shaft 104 with its eccentric pin 136. This is stored in the housing 102. To reduce the friction between the gear 130 and the pin 136, the latter carries a ball bearing 138. Instead of the ball bearing 138, a plain bearing, for example in the form of a sleeve held by means of a snap ring on the pin 136.
  • the driver member 115 In operation of the hammer drill, the driver member 115 is driven back and forth via the eccentric 108. In this case, only the vertical deflections of the eccentric 108 lying in the plane of the drawing are transmitted through the fork 112 to the driver member 115, which can only be tilted in this plane.
  • the striking mechanism is shown in operation, the striker 124 is in its foremost position, which acts on the spindle 131. The rotary drive of the spindle 131 takes place via the toothing 129 of the shaft 104 and the gear 130.
  • the striking mechanism is switched off by the tool (not shown in FIG. 2) by moving the gear 130 away from the striker 124 and the drive member 107 following it due to a spring (not shown).
  • the eccentric 108 slides out with its bearing 110 the fork 112 out.
  • the driver member 115 stops and with it the attached racket 124. This prevents weary blows of the striking mechanism 105, in particular when work is interrupted.
  • the hammer mechanism can also be switched off arbitrarily for pure drilling.
  • the shift lever 137 is rotated by 90 °, so that the pin 136 assumes its forward position.
  • the gear 130 and the drive member 107 following it are also moved into its forward position.
  • the eccentric 108 disengages from the fork 112 and the striking mechanism 105 out of operation.
  • the striking mechanism 105 is reconnected in a very material-friendly manner in that the bent ends of the arms 113, 114 of the funnel-shaped fork 112 rest against the oncoming outer ring 111 of the bearing 110. As the drive member 107 progressively moves rearward, the outer ring 111 dips more and more into the fork 112 until the eccentric deflection is fully transmitted to the driver member 115. The elasticity of the fork 112 causes additional damping when engaging.
EP93114210A 1992-09-24 1993-09-04 Marteau de frappe et/ou de forage Expired - Lifetime EP0589267B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4231985 1992-09-24
DE4231985A DE4231985A1 (de) 1992-09-24 1992-09-24 Bohr- und/oder Schlaghammer

Publications (3)

Publication Number Publication Date
EP0589267A2 true EP0589267A2 (fr) 1994-03-30
EP0589267A3 EP0589267A3 (en) 1994-06-01
EP0589267B1 EP0589267B1 (fr) 1997-01-02

Family

ID=6468720

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93114210A Expired - Lifetime EP0589267B1 (fr) 1992-09-24 1993-09-04 Marteau de frappe et/ou de forage

Country Status (2)

Country Link
EP (1) EP0589267B1 (fr)
DE (2) DE4231985A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008107232A1 (fr) * 2007-03-02 2008-09-12 Robert Bosch Gmbh Système d'engrenage
WO2012072326A1 (fr) * 2010-11-29 2012-06-07 Robert Bosch Gmbh Mécanisme de percussion à marteau

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19652751C2 (de) * 1996-12-18 1999-08-19 Bosch Gmbh Robert Handwerkzeugmaschine mit einem Gebläse
DE19958420A1 (de) * 1999-12-03 2001-06-07 Arno Thiel Federschlagwerk mit automatischer Schlagabschaltung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4325436A (en) * 1980-05-21 1982-04-20 Hilti Aktiengesellschaft Hammer drill or chipping hammer device
EP0145070A2 (fr) * 1983-11-24 1985-06-19 Emerson Electric Co. Dispositif d'entraînement d'un outil de perçage et/ou de percussion
DE3931329C1 (fr) * 1989-05-31 1990-06-28 Robert Bosch Gmbh, 7000 Stuttgart, De
DE4121279A1 (de) * 1991-06-27 1993-01-07 Bosch Gmbh Robert Bohr- und/oder schlaghammer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4325436A (en) * 1980-05-21 1982-04-20 Hilti Aktiengesellschaft Hammer drill or chipping hammer device
EP0145070A2 (fr) * 1983-11-24 1985-06-19 Emerson Electric Co. Dispositif d'entraînement d'un outil de perçage et/ou de percussion
DE3931329C1 (fr) * 1989-05-31 1990-06-28 Robert Bosch Gmbh, 7000 Stuttgart, De
DE4121279A1 (de) * 1991-06-27 1993-01-07 Bosch Gmbh Robert Bohr- und/oder schlaghammer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008107232A1 (fr) * 2007-03-02 2008-09-12 Robert Bosch Gmbh Système d'engrenage
US8176994B2 (en) 2007-03-02 2012-05-15 Robert Bosch Gmbh Transmission device
RU2467866C2 (ru) * 2007-03-02 2012-11-27 Роберт Бош Гмбх Передаточный механизм
CN101641188B (zh) * 2007-03-02 2014-03-05 罗伯特·博世有限公司 传动装置
WO2012072326A1 (fr) * 2010-11-29 2012-06-07 Robert Bosch Gmbh Mécanisme de percussion à marteau

Also Published As

Publication number Publication date
EP0589267B1 (fr) 1997-01-02
DE59304954D1 (de) 1997-02-13
EP0589267A3 (en) 1994-06-01
DE4231985A1 (de) 1994-03-31

Similar Documents

Publication Publication Date Title
EP0429475B1 (fr) Marteau perforateur ou de demolition
DE19944294B4 (de) Fremdkraftgetriebener Bohrhammer mit verbessertem Betriebsmodusumschalter
EP0590352B1 (fr) Marteau de frappe et/ou de forage
DE3504650C2 (de) Bohrhammer mit Verstärkung der Betätigungskraft für die Kupplung des Schlagantriebes
EP1578564B1 (fr) Marteau perforateur
DE3205141C2 (fr)
DE19545260A1 (de) Bohrhammer
EP0050192A1 (fr) Perceuse à percussion
EP2104595B1 (fr) Marteau perforateur et/ou burineur
DE4121279A1 (de) Bohr- und/oder schlaghammer
EP3456479B1 (fr) Dispositif d'entraînement pour une machine-outil motorisée
EP0318480A1 (fr) Dispositif d'arret d'outils a percussion.
DE102012214938B4 (de) Getriebeanordnung für eine angetriebene Werkzeugmaschine sowie Werkzeugmaschine mit einer solchen Getriebeanordnung
EP0589267B1 (fr) Marteau de frappe et/ou de forage
EP0129865A1 (fr) Outil à percussion, notamment marteau perforateur
DE4441820A1 (de) Bohr- und/oder Schlaghammer
DE3224050A1 (de) Antriebsvorrichtung fuer das schlagwerk eines schlag- oder bohrhammers
DE3039617C2 (fr)
DE3241863C2 (fr)
WO2008080653A1 (fr) Mécanisme de percussion d'une machine-outil électrique portative
DE3123537C2 (de) Schriftenhammer
EP3461594A1 (fr) Élément de réglage et dispositif d'entraînement pour une machine-outil entraînée
DE19716976A1 (de) Elektrowerkzeugmaschine
DE19856638A1 (de) Antrieb für ein Elektrowerkzeug, insbesondere einen Bohrhammer, sowie Bohrhammer
DE3634591A1 (de) Bohrhammer mit einem luftpolsterschlagwerk

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

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB IT NL

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB IT NL

17P Request for examination filed

Effective date: 19941201

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

17Q First examination report despatched

Effective date: 19960605

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT NL

ET Fr: translation filed
REF Corresponds to:

Ref document number: 59304954

Country of ref document: DE

Date of ref document: 19970213

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19970305

ITF It: translation for a ep patent filed

Owner name: 0414;07MIFSTUDIO JAUMANN

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20040917

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20050824

Year of fee payment: 13

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050904

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20050920

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20051118

Year of fee payment: 13

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060401

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20060401

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070403

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20060904

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20070531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060904

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20061002