EP0419866A2 - Marteau de forage - Google Patents

Marteau de forage Download PDF

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Publication number
EP0419866A2
EP0419866A2 EP19900116431 EP90116431A EP0419866A2 EP 0419866 A2 EP0419866 A2 EP 0419866A2 EP 19900116431 EP19900116431 EP 19900116431 EP 90116431 A EP90116431 A EP 90116431A EP 0419866 A2 EP0419866 A2 EP 0419866A2
Authority
EP
European Patent Office
Prior art keywords
intermediate shaft
gear
hammer
hammer drill
drill 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.)
Granted
Application number
EP19900116431
Other languages
German (de)
English (en)
Other versions
EP0419866A3 (en
EP0419866B1 (fr
Inventor
Manfred Bleicher
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 EP0419866A2 publication Critical patent/EP0419866A2/fr
Publication of EP0419866A3 publication Critical patent/EP0419866A3/de
Application granted granted Critical
Publication of EP0419866B1 publication Critical patent/EP0419866B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • B25D2211/003—Crossed drill and motor spindles
    • 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 relates to a hammer drill according to the preamble of claim 1.
  • the pinion of the motor meshes with a bevel gear arranged on an intermediate shaft. Therefore, this hammer builds very long in the axis direction of the engine, which makes the hammer unwieldy.
  • the hammer drill according to the invention with the characterizing features of claim 1 has the advantage that it is more compact and more manageable. It also has the advantage that a complete assembly with intermediate shaft and hammer mechanism drive and another assembly with an angular gear can be taken over by other hand tools. This leads to considerable cost savings.
  • a hammer drill 1 has a housing 2 in which an impact mechanism 3, a first intermediate shaft 4 and an electric drive motor 5 arranged perpendicular to the axis of the impact mechanism 3 are accommodated.
  • the hammer drill 1 has a tool holder 6 for a drilling or striking tool 7.
  • the housing 2 On the side facing away from the tool holder 6, the housing 2 carries, in a known manner, a closed handle 8, in which a trigger switch 9 is arranged, which controls the drive motor 5.
  • the handle 8 extends over the entire height H of the housing 2, which is determined by the length of the drive motor 5.
  • the pneumatic striking mechanism 3 with hollow piston 12 and striker 13 is, as in the hammer drill according to DE-OS 38 19 125, from one a swash hub 14 and a swash plate 15 existing movement conversion gear 16 in reciprocating movements.
  • the wobble hub 14 is held by a ball bearing 17 in an insert housing 18 connected to the housing 2.
  • the intermediate shaft 4 is rotatably and axially displaceably arranged.
  • the intermediate shaft 4 is perpendicular, that is in the direction of the axis of the drive motor 5, below the striking mechanism 3; but it can also be arranged obliquely below the striking mechanism 3.
  • the intermediate shaft 4 can be coupled and driven in rotation with a spur gear 20 via a clutch 19.
  • the spur gear 20 can optionally be coupled to the wobble hub 14 via a second clutch 21, as a result of which the striking mechanism 3 is activated.
  • the clutches 19, 21 are preferably dog clutches.
  • the intermediate shaft 4 also drives the tool holder 6 in a known manner. Striking mechanism 3, movement conversion gear 16 with swash plate 15 and intermediate shaft 4 together form an assembly 10 which comes from a smaller, higher-speed hammer with a motor arranged parallel to the striking mechanism axis, as described in DE-OS 38 19 125.
  • the spur gear 20 engages in an axially elongated toothing 22 of a second intermediate shaft 23.
  • the second intermediate shaft 23 is arranged on the side of the first intermediate shaft 4 facing the striking mechanism 3, that is to say above it, and is held in two roller bearings 24 and 25.
  • the second intermediate shaft 23 carries at its end opposite the toothing 22 a bevel gear ring gear 26, the toothing 27 of which points in the direction of the first intermediate shaft 4.
  • a pinion 29 with a bevel gear is arranged, which meshes with the bevel gear 26 and together with this forms an angular gear 30.
  • the torque of the drive motor 5 is via the angular gear 30, which is also in the form of a conventional spur gear with ring gear forms can be transmitted to the second intermediate shaft 23.
  • the angular gear 30 forms an assembly 31 which can also be used in other handheld power tools.
  • the reduction of the angular gear causes a first reduction in the speed, which increases the larger the diameter of the ring gear 26 is.
  • a further reduction of the speed takes place in the gear connection between the toothing 22 of the second intermediate shaft 23 and the spur gear 20.
  • the speed of the rotary hammer is reduced to values that enable working with drilling tools up to 30 millimeters in diameter.
  • the individual impact strength of the striking mechanism 3 increases and the impact number decreases in the desired manner.
  • the elongated toothing 22 in the second intermediate shaft 23 enables axial displacement of the spur gear 20 over a wide range, so that the couplings 19, 21 between the first intermediate shaft 4, the spur gear 20 and the wobble hub 14 by axial displacement of the first intermediate shaft 4 or the first Intermediate shaft 4 can be switched together with the spur gear 20 without the spur gear 20 disengaging from the toothing 22 of the second intermediate shaft 23.
  • the first intermediate shaft 4 is shown in the position in which it serves to transmit the rotary drive to the tool holder 6; the clutch 19 is engaged. If the intermediate shaft 4 is moved to the left in the drawing, both clutches 19 and 21 come into engagement and the striking mechanism is additionally activated for rotary striking for the rotary drive.
  • Striking mechanism 3 and drive motor 5 do not have to be arranged exactly perpendicular to one another; they can also be at a shallower angle to each other, the z. B. arises when a conventional cylindrical is used instead of the conical pinion 29.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Drilling And Boring (AREA)
EP90116431A 1989-09-28 1990-08-28 Marteau de forage Expired - Lifetime EP0419866B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3932413A DE3932413A1 (de) 1989-09-28 1989-09-28 Bohrhammer
DE3932413 1989-09-28

Publications (3)

Publication Number Publication Date
EP0419866A2 true EP0419866A2 (fr) 1991-04-03
EP0419866A3 EP0419866A3 (en) 1991-05-02
EP0419866B1 EP0419866B1 (fr) 1993-10-27

Family

ID=6390402

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90116431A Expired - Lifetime EP0419866B1 (fr) 1989-09-28 1990-08-28 Marteau de forage

Country Status (3)

Country Link
EP (1) EP0419866B1 (fr)
JP (1) JP2918057B2 (fr)
DE (2) DE3932413A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2285764A (en) * 1994-01-21 1995-07-26 Bosch Gmbh Robert Hammer drill speed controller
GB2428757A (en) * 2005-08-04 2007-02-07 Bosch Gmbh Robert An electric hand tool with mode changing device operated by axial movement of a layshaft
GB2439186A (en) * 2006-06-12 2007-12-19 Bosch Gmbh Robert Hammer drill with bevel gear transmission
CN104044118A (zh) * 2013-03-12 2014-09-17 英古所连公司 角冲击工具
US10131037B2 (en) 2011-02-23 2018-11-20 Ingersoll-Rand Company Angle impact tool
US11826891B2 (en) 2019-10-21 2023-11-28 Makita Corporation Power tool having hammer mechanism

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4202767C2 (de) * 1992-01-31 1999-06-02 Black & Decker Inc Bohrhammer
CN103894981A (zh) * 2012-12-25 2014-07-02 苏州宝时得电动工具有限公司 电锤
DE102017121720A1 (de) * 2017-09-19 2019-03-21 Metabowerke Gmbh Getriebeanordnung für eine angetriebene Werkzeugmaschine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2224216A1 (fr) * 1973-04-05 1974-10-31 Kango Electric Hammers Ltd
DE3423919A1 (de) * 1984-06-29 1986-01-09 Robert Bosch Gmbh, 7000 Stuttgart Bohrhammer
DE3819125A1 (de) * 1988-06-04 1989-12-14 Bosch Gmbh Robert Bohrhammer
EP0358978A1 (fr) * 1988-09-01 1990-03-21 Black & Decker Inc. Marteau de forage rotatif

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2224216A1 (fr) * 1973-04-05 1974-10-31 Kango Electric Hammers Ltd
DE3423919A1 (de) * 1984-06-29 1986-01-09 Robert Bosch Gmbh, 7000 Stuttgart Bohrhammer
DE3819125A1 (de) * 1988-06-04 1989-12-14 Bosch Gmbh Robert Bohrhammer
EP0358978A1 (fr) * 1988-09-01 1990-03-21 Black & Decker Inc. Marteau de forage rotatif

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2285764A (en) * 1994-01-21 1995-07-26 Bosch Gmbh Robert Hammer drill speed controller
GB2285764B (en) * 1994-01-21 1997-04-16 Bosch Gmbh Robert Hammer drill
GB2428757A (en) * 2005-08-04 2007-02-07 Bosch Gmbh Robert An electric hand tool with mode changing device operated by axial movement of a layshaft
GB2428757B (en) * 2005-08-04 2007-11-07 Bosch Gmbh Robert An electric hand tool with a mode changing device
US7591324B2 (en) 2005-08-04 2009-09-22 Robert Bosch Gmbh Clutch device for an electric machine tool and an electric machine tool
GB2439186A (en) * 2006-06-12 2007-12-19 Bosch Gmbh Robert Hammer drill with bevel gear transmission
GB2439186B (en) * 2006-06-12 2008-10-08 Bosch Gmbh Robert Hammer drill and/or percussion hammer
US10131037B2 (en) 2011-02-23 2018-11-20 Ingersoll-Rand Company Angle impact tool
CN104044118A (zh) * 2013-03-12 2014-09-17 英古所连公司 角冲击工具
US11826891B2 (en) 2019-10-21 2023-11-28 Makita Corporation Power tool having hammer mechanism

Also Published As

Publication number Publication date
DE59003228D1 (de) 1993-12-02
DE3932413A1 (de) 1991-04-11
JP2918057B2 (ja) 1999-07-12
JPH03117572A (ja) 1991-05-20
EP0419866A3 (en) 1991-05-02
EP0419866B1 (fr) 1993-10-27

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