EP2104595B1 - Bohr- und/oder Schlaghammer - Google Patents

Bohr- und/oder Schlaghammer Download PDF

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Publication number
EP2104595B1
EP2104595B1 EP07822043.1A EP07822043A EP2104595B1 EP 2104595 B1 EP2104595 B1 EP 2104595B1 EP 07822043 A EP07822043 A EP 07822043A EP 2104595 B1 EP2104595 B1 EP 2104595B1
Authority
EP
European Patent Office
Prior art keywords
hammer
percussion
drive
drive motor
housing part
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.)
Not-in-force
Application number
EP07822043.1A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2104595A1 (de
Inventor
Rudolf Fuchs
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 EP2104595A1 publication Critical patent/EP2104595A1/de
Application granted granted Critical
Publication of EP2104595B1 publication Critical patent/EP2104595B1/de
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
    • 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
    • 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
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02—Construction of casings, bodies or handles
    • 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
    • B25D2211/006—Parallel drill and motor spindles
    • 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
    • B25D2250/245—Spatial arrangement of components of the tool relative to each other

Definitions

  • the invention relates to a drilling and / or percussion hammer with an electric drive motor, which is connectable via a transmission with a work spindle and / or an impact mechanism.
  • Such hammer drill are for example from the US 4,431,062 A and the WO 2005/070616 A1 known.
  • Drills and / or impact hammers are usually made in lower weight classes in pistol construction. This is characterized by a parallel course of the motor axis of an electric drive motor with the work spindle, with which a tool, such as a drill, can be coupled.
  • the pistol design is characterized by a relatively large length.
  • Rotary hammers in L-construction as for example from the US 4,431,062 A are known, have over the gun design a shorter length.
  • the L-construction is characterized in that the motor axis of the electric drive motor is at an angle to the work spindle. However, for some applications, the shorter overall length of the L-shaped rotary hammer is still too large.
  • an angle drill head with impact transmission (angle hammer drill head) is used as the attachment.
  • angle hammer drill heads which can be mounted on demand on the hammer drill and in which in addition to the rotation and deflect the striking movement by 90 °.
  • the impact movement of the striking mechanism is transmitted to a firing pin with 45 ° bevel.
  • the transfer requires high skill accuracy and the use of high-quality tool steels due to high friction losses in the sliding bevels.
  • the impact transmission of the angle drill head is associated with low efficiency.
  • the mechanically rigid angular transmission allows only a fixed output angle and thus limits a universal applicability.
  • due to the rigid angular transmission no complete knock decoupling, so a strong manual pressure by the operator in Drilling direction is required. This results in considerable handling disadvantages.
  • the object of the invention is to provide a drill and / or percussion hammer whose overall length can be reduced.
  • the housing of the drilling and / or percussion hammer consists of a drive motor receiving drive housing part and a working spindle and a striking mechanism receiving percussion gear housing part, and that a central axis of a shaft of a transmission forms a pivot axis about which the drive motor to reduce the Length of the drilling and / or percussion hammer is pivotable via a joint between the drive housing part and the striking mechanism housing part.
  • Due to the pivotability of the drive motor is both in a drilling and / or percussion hammer in pistol construction, in which the central axis of the drive shaft of the drive motor is parallel to the work spindle, as well as a drilling and / or hammer in L-type, in which the drive shaft the drive motor extends at an angle to the work spindle, a reduction in the length possible.
  • "Overall length” in this context is the space requirement in the working direction, that is to understand in alignment of the work spindle.
  • the possibility of pivoting the drive motor about the pivot axis with respect to the work spindle and the percussion mechanism results in a stepless angle adjustment within a large angular range.
  • the hammer drill and / or percussion hammer can be a pure hammer drill, a hammer drill for drilling and / or chisel operation (combination hammer) or a pure percussion hammer.
  • the work spindle and impact mechanism are mounted in the percussion gear housing part, the drive motor is mounted in the drive housing part.
  • the transmission is assigned to the drive housing part and the percussion mechanism housing part.
  • the transmission is both part of the first machine unit and part of the second machine unit of the drilling and / or percussion hammer.
  • there are components of the transmission which belong exclusively to the first machine unit, as well as other components that belong exclusively to the second machine unit.
  • working spindle and percussion mechanism have a common axis of movement about which the work spindle rotates and / or along which a striking mass of the impact mechanism moves.
  • a common axis of movement of rotation and impact operation is realized, for example, in a trained as a hammer drill and / or percussion hammer, for example, a reciprocating bat has the impact mass.
  • the movement axis is arranged perpendicular to the pivot axis. Due to the vertical arrangement, the pivot axis is optimally chosen to shorten the overall length.
  • the central axis of the drive shaft is arranged perpendicular to a pivoting plane of the drive motor.
  • the pivot plane is the plane perpendicular to the pivot axis in which the drive motor is pivoted.
  • the drilling and / or percussion hammer according to the invention is designed in L-construction.
  • the central axis of the drive shaft is arranged parallel to a pivot plane of the drive motor. In a parallel arrangement of the central axis of the drive shaft of the drilling and / or percussion hammer is designed in pistol construction.
  • a component, in particular a hammer tube, of the percussion mechanism forms or co-forms the drive spindle.
  • the rotary drive of the tool thus takes place via a component of the striking mechanism.
  • This component is in particular the hammer tube of the striking mechanism.
  • the drilling and / or percussion hammer at least one coupling for selectively connecting the drive motor with the work spindle and / or the striking mechanism. For example, if two separate drive paths for driving the percussion mechanism and the work spindle, each with a coupling designed as a disconnect clutch available, then a rotary and / or beating operation of the drilling and / or percussion hammer can be realized.
  • FIG. 1 shows an inventive, designed as a hammer drill 1 electric hand tool 2 gun-style.
  • the side view of FIG. 1 (top) on the hammer drill 1 shows the first machine unit 3 with a percussion gear housing part 4 and a tool holder 5.
  • the first machine unit 3 is connected to a second machine unit 6 of the hammer drill 1 by a hinge, so that the second machine unit 6 relative to the first machine unit. 3 (or the first machine unit 3 relative to the second machine unit 6) can be pivoted about a pivot axis 8.
  • the second machine unit 6 has a typical for the gun construction handle 9 with operating switch 10 of a drive housing part 11.
  • the striking mechanism housing part 4 and the drive housing part 11 together form the housing 12 of the hammer drill 1 according to the invention FIG.
  • FIG. 2 shows the structure of a transmission 13 for the realization of the hammer drill according to the invention 1.
  • the drive housing part 11 is an only partially shown drive motor with a drive shaft 15.
  • the drive shaft 15 is mounted on a shaft bearing 16 fixed to the housing.
  • the drive shaft 15 drives a on a trained as a crankshaft 17 shaft 18 rotatably mounted ring gear 19 at. Under a ring gear is here and below to understand a ring gear with a conical toothing.
  • the crankshaft 17 is mounted in a designed as a rolling bearing 20 bearing 21 in the drive housing part 11 and the percussion gear housing part 4.
  • crankshaft 17 Another, non-rotatably mounted on the crankshaft 17 fixed ring gear 23 meshes with a ring gear 24 which drives a hammer tube 26 of a percussion mechanism 27 as Hässpindelantriebselement 25 of the drive spindle on the crankshaft 17 for receiving the striking tool housing part.
  • the hammer tube 26 is supported by means of a bearing 28 on the percussion mechanism housing part 4.
  • the rotational movement of the crankshaft 17 also represents the drive for the striking mechanism 27.
  • a cranked arm 29 of the crankshaft 17 converts the rotational movement into a reciprocating movement of a piston 32 of the percussion mechanism 27 with the connecting rod 31 received in a bearing 30.
  • the piston 32 drives in striking mechanism 27 via a non-illustrated air cushion a racket, not shown along a movement axis 33 at.
  • the movement axis 33 is at the same time the axis of rotation of the drive spindle in the hammer drill 1.
  • the central axis 34 of the crankshaft 17 formed as a shaft 18 of the transmission 13 forms the pivot axis 8, by which the drive motor to reduce the overall length of the hammer drill 1 is pivotable.
  • FIG. 3 shows the construction of a hammer drill 1 according to a second embodiment, which substantially the first embodiment of FIG. 2 corresponds, so that only the differences are discussed here.
  • the hammer drill 1 of the second embodiment has an L-type construction.
  • the central axis 35 of the drive shaft 15 is arranged perpendicular to a pivoting plane of the hammer drill 1.
  • the respective drive housing part 2 of the hammer drill 1 according to the embodiments of the Figures 2 and 3 are not shown drive motor and all electrical components of the hammer drill 1 housed.
  • the drive shaft 15 is mounted in a roller bearing 36 and drives via a spur gear 37 designed as a crankshaft 17 shaft 18 at.
  • the bearings 21 each carry one half of the drive housing part 11 and the impact tool housing part 4.
  • a bearing 22 in the drive housing part 11 serves as an abutment for further support of the crankshaft 17.
  • the rotational movement of the drive spindle is initiated and first transferred to the spur gear 40, which is part of an intermediate shaft 41.
  • this intermediate shaft 41 is received.
  • a bevel gear 45 with the fixed to the hammer tube 26 ring gear 24.
  • the drive train of the drive pinion is forwarded to the tool holder 5.
  • the spur gear 38 To generate the impact movement of the percussion mechanism 27 is rotatably on the crankshaft 17 at the front end, the spur gear 38.
  • This spur gear 38 drives via an eccentric to the central axis 34 fixed crank pin 47, the connecting rod 31 at.
  • a low-friction bearing 48 ensures high efficiency in the transmission of the rotational movement.
  • the rotation of the crank pin 47 is transmitted to the piston 32 via the connecting rod 31 rotatably mounted by means of a pin 49.
  • the piston 32 performs in the direction of the movement axis 33, the necessary for the stroke reciprocating motion for driving a racket of the percussion mechanism 27, not shown.
  • the components which are arranged in the impact tool housing part 4 include: For the drill drive, the shaft 41 with spur gear 40, bevel gear 45 and bearings 43, 42, the ring gear 24 with the hammer tube 26 and the other components, not graphically illustrated, for the tool drive; half each of the bearings 21 for the function "panning"; for the impact drive of the piston 32 with the pin 49.
  • the central axis 34 of the crankshaft 17 formed as a shaft 18 is the interface for the rotary actuator.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Drilling And Boring (AREA)
EP07822043.1A 2006-12-27 2007-10-30 Bohr- und/oder Schlaghammer Not-in-force EP2104595B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006061625A DE102006061625A1 (de) 2006-12-27 2006-12-27 Elektrohandwerkzeugmaschine
PCT/EP2007/061689 WO2008080664A1 (de) 2006-12-27 2007-10-30 Elektrohandwerkzeugmaschine

Publications (2)

Publication Number Publication Date
EP2104595A1 EP2104595A1 (de) 2009-09-30
EP2104595B1 true EP2104595B1 (de) 2017-01-25

Family

ID=39046763

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07822043.1A Not-in-force EP2104595B1 (de) 2006-12-27 2007-10-30 Bohr- und/oder Schlaghammer

Country Status (6)

Country Link
US (1) US8261850B2 (ru)
EP (1) EP2104595B1 (ru)
CN (1) CN101568410B (ru)
DE (1) DE102006061625A1 (ru)
RU (1) RU2455144C2 (ru)
WO (1) WO2008080664A1 (ru)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011119890B4 (de) 2011-11-29 2024-02-29 Robert Bosch Gmbh 1Werkzeug, insbesondere Schraubwerkzeugmit schwenkbarem Winkelkopf

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102371573A (zh) * 2010-08-10 2012-03-14 南京德朔实业有限公司 电动工具
US9038745B2 (en) * 2010-12-20 2015-05-26 Brigham Young University Hand power tool and drive train
JP2012223870A (ja) * 2011-04-21 2012-11-15 Makita Corp 打撃工具
US9956676B2 (en) * 2013-01-09 2018-05-01 Techtronic Power Tools Technology Limited Tool with rotatable head
CN103056845B (zh) * 2013-01-30 2015-05-27 湖南理工学院 手持式锤钻工具机
DE102013210391A1 (de) * 2013-06-05 2014-12-11 Robert Bosch Gmbh Elektrowerkzeug
CN110000411A (zh) * 2019-03-27 2019-07-12 浙江华格供应链服务有限公司永康分公司 一种手柄可转动的电钻
EP3789161A1 (de) 2019-09-06 2021-03-10 Hilti Aktiengesellschaft Handwerkzeugmaschine
US20220023957A1 (en) * 2020-07-22 2022-01-27 Angel Botello Sheet Metal Tooling Assembly
WO2024044546A1 (en) * 2022-08-22 2024-02-29 Milwaukee Electric Tool Corporation Motor arrangements for a power tool

Citations (3)

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Publication number Priority date Publication date Assignee Title
US4431062A (en) * 1980-01-09 1984-02-14 Robert Bosch Gmbh Rotating drive for impact hammer
US4450919A (en) * 1983-01-03 1984-05-29 Cousineau Bernard L Drill attachment
WO2005070616A1 (en) * 2004-01-23 2005-08-04 Concept To Reality Pty Ltd Multidirectional transmission

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Publication number Priority date Publication date Assignee Title
US4431062A (en) * 1980-01-09 1984-02-14 Robert Bosch Gmbh Rotating drive for impact hammer
US4450919A (en) * 1983-01-03 1984-05-29 Cousineau Bernard L Drill attachment
WO2005070616A1 (en) * 2004-01-23 2005-08-04 Concept To Reality Pty Ltd Multidirectional transmission

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011119890B4 (de) 2011-11-29 2024-02-29 Robert Bosch Gmbh 1Werkzeug, insbesondere Schraubwerkzeugmit schwenkbarem Winkelkopf

Also Published As

Publication number Publication date
DE102006061625A1 (de) 2008-07-03
CN101568410A (zh) 2009-10-28
RU2009128742A (ru) 2011-02-10
EP2104595A1 (de) 2009-09-30
WO2008080664A1 (de) 2008-07-10
US8261850B2 (en) 2012-09-11
CN101568410B (zh) 2014-12-10
US20110000693A1 (en) 2011-01-06
RU2455144C2 (ru) 2012-07-10

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