EP0601349A1 - Marteau de percussion et/ou de forage - Google Patents

Marteau de percussion et/ou de forage Download PDF

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Publication number
EP0601349A1
EP0601349A1 EP93118197A EP93118197A EP0601349A1 EP 0601349 A1 EP0601349 A1 EP 0601349A1 EP 93118197 A EP93118197 A EP 93118197A EP 93118197 A EP93118197 A EP 93118197A EP 0601349 A1 EP0601349 A1 EP 0601349A1
Authority
EP
European Patent Office
Prior art keywords
hammer
tube
tool holder
striker
drill
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Withdrawn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
EP93118197A
Other languages
German (de)
English (en)
Inventor
Ulrich Dipl.-Ing. Bohne (Fh)
Joachim Dipl.-Ing. Hecht
Ernst Kränzler
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 EP0601349A1 publication Critical patent/EP0601349A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D41/00—Application of procedures in order to alter the diameter of tube ends
    • B21D41/04—Reducing; Closing
    • 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

Definitions

  • the invention is based on a hammer drill and / or percussion hammer according to the preamble of claim 1.
  • hammers are widely used, e.g. Known from DE 41 21 279 A1:
  • the guide tube or hammer tube for the striking mechanism there consists of a machined piece of tube which also serves as a tool receiving sleeve.
  • additional diameter-reducing inserts are sometimes provided for guiding the striking mechanism parts.
  • the tool holder itself is manufactured using complex machining processes such as turning, grinding and broaching.
  • the hammer and / or percussion hammer according to the invention and the method for its production with the characterizing features of the independent claims have the advantage that machining of the hammer tube can be omitted or at least reduced to a fraction and any reworking is eliminated. Additional insert parts in the hammer tube are also eliminated. This saves raw materials and the strength of the hammer tube is considerably increased by largely uninterrupted fiber routing. In addition, the measure leads to a significantly improved concentricity of the tools used compared to versions with additional inserts.
  • FIG. 1 An embodiment of the invention are shown in the drawing and explained in more detail in the following description.
  • the figure shows a longitudinal section through a hammer drill.
  • FIG. 1 shows a detail of a rotary hammer 1 with a housing 2 and a motor 3 at the rear.
  • the motor 3 drives a striking mechanism 5 via a shaft 4.
  • This has a racket 6, which acts via a striker 7 on a tool, not shown, which is accommodated in a tool holder 8 at the front and which is guided in a receiving sleeve 9.
  • the racket 6 is driven back and forth by a spring-stiff driver member 11. This is mounted such that it can be tilted about a tilt axis 12 and is coupled to a drive member 13.
  • the drive member 13 consists of an articulation sleeve 16, which has a downward extension with an opening 18.
  • the centerpiece of the drive is two eccentric parts 20, 21 which can be rotated relative to one another to a limited extent and which abut or engage in one another.
  • the inner eccentric part 20 consists of two links 20a, 20b for assembly reasons. These are mutually immovable and fixed during operation, e.g. connected to the shaft 4 by welding or pressing.
  • the eccentric part 20 has an eccentric outer ring surface 22 on which an inner ring surface 23 of an outer eccentric part 21 rests.
  • the articulation sleeve 16 is supported on a needle bearing 25 on an outer peripheral surface of the eccentric part 21.
  • the articulation sleeve 16 is secured by a collar 26 on the eccentric part 21 and a spring-loaded spacer sleeve 27, which urges the entire drive member 13 towards the tool holder 8.
  • the exact design and function of the inner eccentric part 20 is described in DE 42 31 986, to which express reference is made here.
  • the striking mechanism 5 is guided in a hammer tube 29 which extends into the tool holder 8 and is axially movable to a limited extent and which is rotatably mounted in the housing 2.
  • a gear 30 for rotary drive is firmly connected, which meshes with a second gear 31 seated on the shaft 4.
  • the toothed wheel 30 On its end face facing the eccentric part 21, the toothed wheel 30 carries an axial bearing 32 which, with the interposition of a disk 33, is in contact with the end face of the eccentric part 21 on the collar.
  • the gear parts are sealed by a shaft sealing ring 34 inserted between housing 2 and hammer tube 29.
  • the hammer tube 29 has a rear section 35 with a larger diameter and a front section 36 with a narrower diameter which forms the receiving sleeve 9.
  • the front section 36 is manufactured by an originally the diameter further section 35 corresponding pipe piece, preferably a precision steel tube, is reduced in diameter without cutting. This is advantageously done by round hammers or kneading.
  • an outer shoulder 37 and an inner shoulder 38 are formed between the sections 35, 36.
  • a compression spring 39 is supported on the outer shoulder 37 of the hammer tube 29 and acts in a known manner on a locking body 40 in the tool holder 8.
  • the inner shoulder 38 serves as a front stop for the die 7; a locking ring 41 serves as the rear stop.
  • the receiving sleeve 9 has at least one opening 42 for the locking body 40 and one or more axially extending rotary driving bars 43. These protrude into the free bore of the receiving sleeve 9 and are also formed without cutting out of the wall of the receiving sleeve 9. This is preferably done by kneading in one operation with the diameter reduction described above. A very high dimensional accuracy is achieved even without post-processing by machining processes.
  • the eccentric part 21 When the tool 9 is pressed less strongly, the eccentric part 21 can move axially a little to the right relative to the eccentric part 20. It inevitably twists along the curved tracks 37 compared to the inner eccentric part 20, which reduces the total eccentricity. If the tool 9 is completely removed from the workpiece, the outer eccentric part 21 comes into its front end position, as shown in FIG. 2, under pressure from the spring-loaded spacer sleeve 27. Since the total eccentricity of the drive member 13 is now zero, the articulation sleeve 16 remains without a deflection and the lever 14 stands still. The striking mechanism is thus switched off.
  • the invention is not limited to the illustrated embodiment. In particular, it can also be used on rotary hammers with a pneumatic hammer mechanism.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP93118197A 1992-12-05 1993-11-10 Marteau de percussion et/ou de forage Withdrawn EP0601349A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4241000 1992-12-05
DE19924241000 DE4241000A1 (de) 1992-12-05 1992-12-05 Bohr- und/oder Schlaghammer

Publications (1)

Publication Number Publication Date
EP0601349A1 true EP0601349A1 (fr) 1994-06-15

Family

ID=6474495

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93118197A Withdrawn EP0601349A1 (fr) 1992-12-05 1993-11-10 Marteau de percussion et/ou de forage

Country Status (2)

Country Link
EP (1) EP0601349A1 (fr)
DE (1) DE4241000A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100225075A1 (en) * 2007-08-01 2010-09-09 Joachim Hecht Hand power tool with a tool holder
CN103221185A (zh) * 2010-11-29 2013-07-24 罗伯特·博世有限公司 锤击机构

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10362025B4 (de) * 2003-05-20 2006-02-09 Robert Bosch Gmbh Bohr- oder Schlaghammer
DE10323606B4 (de) * 2003-05-20 2005-04-14 Robert Bosch Gmbh Elastische Döpperführung

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2029997A1 (de) * 1970-06-18 1971-12-23 Fa. C.& E. Fein, 7000 Stuttgart Motorisch angetriebenes Hammer-Handwerkzeug
DE2313415A1 (de) * 1973-03-17 1974-09-26 Union Sils Van De Loo & Co Nabenrohr fuer radnaben sowie verfahren und vorrichtung zur herstellung derselben
DE2726214A1 (de) * 1977-06-10 1978-12-21 Hilti Ag Bohrhammer mit pneumatisch angetriebenem schlagkolben
FR2511289A1 (fr) * 1981-08-17 1983-02-18 Hilti Ag Marteau perforateur a cylindre de guidage du mecanisme de percussion
WO1986003705A1 (fr) * 1984-12-21 1986-07-03 Zahnradfabrik Friedrichshafen Ag Procede de fabrication d'une boite a clapet en une seule piece pour vanne a tiroir rotatif
WO1990001400A1 (fr) * 1988-08-02 1990-02-22 Robert Bosch Gmbh Marteau perforateur ou de demolition
WO1993000201A1 (fr) * 1991-06-27 1993-01-07 Robert Bosch Gmbh Marteau perforateur et/ou frappeur

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2029997A1 (de) * 1970-06-18 1971-12-23 Fa. C.& E. Fein, 7000 Stuttgart Motorisch angetriebenes Hammer-Handwerkzeug
DE2313415A1 (de) * 1973-03-17 1974-09-26 Union Sils Van De Loo & Co Nabenrohr fuer radnaben sowie verfahren und vorrichtung zur herstellung derselben
DE2726214A1 (de) * 1977-06-10 1978-12-21 Hilti Ag Bohrhammer mit pneumatisch angetriebenem schlagkolben
FR2511289A1 (fr) * 1981-08-17 1983-02-18 Hilti Ag Marteau perforateur a cylindre de guidage du mecanisme de percussion
WO1986003705A1 (fr) * 1984-12-21 1986-07-03 Zahnradfabrik Friedrichshafen Ag Procede de fabrication d'une boite a clapet en une seule piece pour vanne a tiroir rotatif
WO1990001400A1 (fr) * 1988-08-02 1990-02-22 Robert Bosch Gmbh Marteau perforateur ou de demolition
WO1993000201A1 (fr) * 1991-06-27 1993-01-07 Robert Bosch Gmbh Marteau perforateur et/ou frappeur

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100225075A1 (en) * 2007-08-01 2010-09-09 Joachim Hecht Hand power tool with a tool holder
US8276483B2 (en) * 2007-08-01 2012-10-02 Robert Bosch Gmbh Hand-held power tool with a tool holder
CN103221185A (zh) * 2010-11-29 2013-07-24 罗伯特·博世有限公司 锤击机构

Also Published As

Publication number Publication date
DE4241000A1 (de) 1994-06-09

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