EP0976505A2 - Machine à forer portable - Google Patents

Machine à forer portable Download PDF

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Publication number
EP0976505A2
EP0976505A2 EP99810637A EP99810637A EP0976505A2 EP 0976505 A2 EP0976505 A2 EP 0976505A2 EP 99810637 A EP99810637 A EP 99810637A EP 99810637 A EP99810637 A EP 99810637A EP 0976505 A2 EP0976505 A2 EP 0976505A2
Authority
EP
European Patent Office
Prior art keywords
striking
axial
percussion
impact
hand 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.)
Granted
Application number
EP99810637A
Other languages
German (de)
English (en)
Other versions
EP0976505B1 (fr
EP0976505A3 (fr
Inventor
Matthias Blessing
Joachim Günther
Adrian Kauf
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Publication of EP0976505A2 publication Critical patent/EP0976505A2/fr
Publication of EP0976505A3 publication Critical patent/EP0976505A3/fr
Application granted granted Critical
Publication of EP0976505B1 publication Critical patent/EP0976505B1/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
    • 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
    • B25D2211/068—Crank-actuated impulse-driving mechanisms

Definitions

  • the invention relates to a hand drill with an impact mechanism for generating axial strikes according to the preamble of claim 1.
  • hand drills are known, some Have rotary drive for a drilling tool and with an impact mechanism for generation are equipped with impulsive impacts that are transmitted to the tool become.
  • the axial strokes support the degrading effect of the drilling tool especially when drilling in brittle failure substrates, such as Concrete, stone, brick masonry and the like.
  • Hand drills For machining very hard and compact substrates, such as concrete and stone, prove themselves Hand drills as very useful with an electropneumatic hammer mechanism are equipped.
  • Such hand drills are well known and are distributed for example by the applicant.
  • the electro-pneumatic hammer mechanism This hand drill is for the generation of axial blows with a high Single impact energy of, for example, about 2 J to about 8 J at a proportional rate low impact frequency of, for example, about 45 Hz to about 80 Hz. Because of the large single impact energy of the axial impacts, hand drills are suitable for the processing of hollow brick masonry is less suitable.
  • Hand drills In addition to the hand drills with electropneumatic hammer mechanism are also Hand drills which have a mechanical hammer mechanism. These include the Ratchet drilling machines known primarily for the DIY sector and those in the semi-professional and professional field used hand drills with Spring striking mechanism or spring-cam striking mechanism.
  • the striking mechanism of this Known hand drills produce axial blows with a relatively small Single impact energy of, for example, about 0.03 J to about 0.3 J with a relative high impact frequency, which is for example up to about 700 Hz. Because of the little ones Single impact energy can also be used with such hand drills as hollow brick masonry can be processed with impact support without destroying the hollow brick. For the Processing of hard surfaces, such as concrete or stone Hand drills with mechanical striking mechanism less used. Because of the low Single impact energy of the axial impact, the user must use the hand drill press relatively hard against the subsoil and the achievable drilling progress is for the professional users generally too small.
  • the object of the present invention is therefore to overcome these disadvantages of the prior art Remedy technology.
  • the user should be able to do so without major Decelerate the surface with the same hand drill and the one for it to work on a suitable working point.
  • the Hand drill according to the invention is provided with a within a housing arranged striking mechanism for generating axial strikes on a in a Tool holder of the hand tool clamped, rotatable drilling or Chisel tools are transferable. Inside is additional arranged a second striking mechanism for generating axial strikes, the axial Beats have an impact energy and a beat frequency that are partial is different from the impact energy and the beat frequency that of the first Striking mechanism generated axial strikes.
  • the clamped in the tool holder Drilling or chisel tools are either from the first or from the second Striking mechanism or of both striking mechanisms together with axial strikes actable.
  • Axial stroke support is also complete for special applications can be switched off.
  • the hand drill according to the invention combines several hand drills Impact mechanisms for partially different single impact energies and Beat frequencies in one device.
  • the hand drill with the first Striking mechanism for axial strikes with high single impact energy and lower Impact frequency or with the additional impact mechanism for axial impacts with smaller Single impact energy and higher single impact energy or with both striking mechanisms can be operated together, its performance can be very easily passed on to the different Surfaces to be adjusted. It is no longer necessary to have multiple hand drills with striking mechanisms for axial strikes with different single impact energies and To provide impact frequencies.
  • the percussion parameters of the percussion mechanism of the Hand drills can be directly adapted to the respective surface at the place of work. It goes without saying that the hand drill also without axial impact support can be operated in that both striking mechanisms can be switched off. This mode is for example for drilling at high speed and without axial impact support in Wood and metal desirable.
  • the first hammer mechanism is electropneumatic Percussion mechanism with an excitation piston arranged inside a guide tube, a flying piston and one in the axial extension of the guide tube arranged drill or chisel tool acting striking element.
  • the second percussion mechanism is preferably a mechanical percussion mechanism which is compatible with the Interlocking element interacts.
  • the differences in single impact energies and Percussion frequencies of the percussion mechanisms are, for example, completely different Strike generation of electro-pneumatic and mechanical striking mechanisms achievable.
  • the mechanical hammer mechanism can be used as a simple ratchet hammer mechanism or as Spring clip striking mechanism be formed. In constructive terms and in spite of to achieve satisfactory drilling progress with lower impact performance a spring-cam striking mechanism as advantageous.
  • the electropneumatic hammer mechanism for generating axial impacts with large single impact energy from about 2 J to about 8 J and low impact frequency from about 45 Hz to about 80 Hz and the spring-cam striking mechanism for generating axial impacts with small Single impact energy of about 0.03 J to about 0.3 J and high impact frequency of about 50 Hz to about 700 Hz are formed.
  • Spring-cam striking mechanism coaxial to the guide tube of the electro-pneumatic striking mechanism arranged and axially penetrated by the striking element.
  • This points Spring-cam percussion a cam ring, which is rotatably arranged in the housing, and a spring-loaded percussion piston.
  • the percussion piston is relative to the Cam ring is rotatably arranged and has cams for axial Interact with the cams of the cam ring.
  • the percussion piston works with one that can be driven in rotation Machine spindle rotatably connected sleeve.
  • the machine spindle forms at the same time the guide tube for the electropneumatic hammer mechanism. That from the Machine spindle torque introduced into the sleeve is preferred over a spherical torque transmission element can be transferred to the percussion piston.
  • the percussion piston counteracts sliding of its cams against those of the cam ring the restoring force of a cylinder spring penetrated by the striking element translational moved away from the cams of the cam ring. After passing the largest stroke it is triggered and accelerated back into the starting position by the cylinder spring. In doing so, he strikes against one provided on the striking element Ring collar, which is in front of the cam ring. This prevents the axial blow is introduced into the housing via the cam ring.
  • the striking mechanisms of the hand drill can be optionally switched on and off. Is to for example, in addition to the switchability of the electropneumatic hammer mechanism for a switching element is provided for the mechanical percussion mechanism, by means of which the Cam of the percussion piston adjustable out of engagement with the cam of the cam ring are.
  • the two striking mechanisms automatically, preferably depending on predefinable criteria during operation, operable to the impact energy and frequency of the adjust axial blows to the surface and thus the optimal working point adjust.
  • FIG. 1 shows a block diagram of the hand drill equipped according to the invention, which is generally designated 1. It has a housing 2 with a handle 3, on which a main switch 4 for activating the hand drill 1 is arranged.
  • the supply of electrical arranged within the housing 2 Components with energy take place via an electrical supply line, which is connected to the Reference number 5 is provided.
  • Housing 2 On the opposite side of the handle 3 Housing 2 is a tool holder 6 into which a drilling or Chisel tool can be clamped, which is indicated in Fig. 1 with the reference numeral 7.
  • An electric drive motor 8 is arranged within the housing 2.
  • the Drive shaft 9 of the drive motor is connected to a gear arrangement 10 which has two outputs.
  • One output of the gear arrangement 10 serves the Rotary drive of the drilling tool 7 clamped in the tool holder 6 an output-side drive shaft 11 of the gear arrangement 10 with a Bevel spur gear 12 provided with a rotationally engaged Circumferential toothing 13 of a machine spindle 14 stands, which is rotationally fixed to the Tool holder 6 is connected.
  • a second shaft 15 at the exit of the Gear arrangement 10 serves to drive an electropneumatic hammer mechanism 16, which is arranged inside the machine spindle 14.
  • the electropneumatic Striking mechanism 16 generated axial strikes are in the tool holder 6th clamped drilling tool 7 transferable. So far the structure of the Hand drill the well-known, axial impact-supported hammer drills as they for example, be sold by the applicant.
  • the axial blows that generated by the second percussion mechanism 20 and that in the tool holder 6 clamped drilling tool 7 transmissible axial blows have a Single impact energy and a beat frequency that is different from that Single impact energy and impact frequency of the first, electropneumatic Striking mechanism 16 produced axial strikes.
  • the second striking mechanism 20 is concerned preferably a mechanical hammer mechanism, for example a Ratchet hammer mechanism, a spring clip hammer mechanism or a spring-cam hammer mechanism.
  • Fig. 2 shows an axial section of the two striking mechanisms 16 and 20. The description is limited to the details necessary for understanding the invention.
  • the second shaft 15 exits the gear unit drives an eccentrically mounted one Excitation piston 17 of the electropneumatic hammer mechanism 16.
  • the exciter piston is guided inside the machine spindle 14, which serves as a guide tube and over their rotatably with the bevel spur gear 12 driven by the drive shaft 11 cooperating external toothing 16 is rotatable about the axis A.
  • the eccentric articulation of the excitation piston 17 Through the eccentric articulation of the excitation piston 17, the rotary movement of the shaft 15 in a translation of the excitation piston 17 implemented within the guide tube 14.
  • Fig. 2 shows the excitation piston 17 at its rear dead center before it again is moved axially in the direction of the tool holder 6.
  • One within the Guide tube 14 located air cushion transmits the axial movement of the Excitation piston 17 on a flying piston 18, which thereby a periodic, axial back and Her movement accomplished.
  • the forward movement of the flying piston 18 in the direction of Tool holder 6 is delimited by a striking element 19, which by the impacting piston 18 transmitted axial impact to the in the Tool holder 6 transmits clamped drilling tool 7.
  • the between that Air piston 18 and the exciter piston 17 located air cushion prevents the rebounding piston 18 strikes the exciter piston 17.
  • Electropneumatic striking mechanisms are well known from the prior art and are also part of the applicant's hammer drill rigs. It goes without saying that device-specific modifications to the electropneumatic hammer mechanism 16 can be provided without moving away from the basic principle described.
  • the axial impacts that can be generated with such electropneumatic impact mechanisms have a single impact energy of about 2 J to about 8 J and are included Beating frequencies from about 45 Hz to about 80 Hz are generated.
  • the second striking mechanism 20 is coaxial with the first, electropneumatic striking mechanism 16 arranged. It is designed and includes in particular as a spring-cam percussion mechanism a cam ring 21 which is non-rotatably held inside the housing 2, and one Percussion piston 22, which is rotatable relative to the cam ring 21 and against the restoring force a spring 23 is axially displaceable.
  • the cam ring 21 and the percussion piston 22 are axially penetrated by the striking element 19.
  • the spring 23 is supported on the one hand Percussion piston 22 and on the other hand on a sleeve 24, which with the machine spindle 14, which forms the guide tube for the electropneumatic hammer mechanism 16, is rotationally coupled.
  • the torque of the machine spindle rotated by the drive motor 14 is on the one hand via the striking element 19 onto the tool holder 6 Transfer clamped drilling tool 7.
  • the torque also introduced into the sleeve 24 and via a preferably spherical torque transmission member 25 transferred to the percussion piston 22.
  • a switching element 31 enables switch off the spring-cam percussion mechanism.
  • FIG. 3 shows the spring-cam percussion mechanism 20 from FIG. 2 on an enlarged scale.
  • the cam ring 21 and the percussion piston 22 are axial from the striking element 19 permeated.
  • the cam ring 21 is rotatably connected to the housing 2, fixed for example by screws 32. It has cams 27 which are switched on State of the spring-cam percussion mechanism 20 are in engagement with cams 28 which on the the side of the percussion piston 22 facing the cam ring 21 are provided.
  • the Torque of the rotating machine spindle 14 is coupled in the rotationally fixed Sleeve 24 initiated. That between the sleeve 24 and the percussion piston 22 in one Axial groove 26 arranged spherical torque transmission member 25 transmits this Torque on the percussion piston 22.
  • the cocked spring 23 accelerates the percussion piston 22 axially in the direction of the cam disk 21 until Collar 29 on the percussion piston 22 strikes against an annular collar 30 on the striking element 19.
  • the collar 30 is in front of the cam ring 21 such that the axial Impact energy of the percussion piston 22 transferred to the striking element 19 and not in the cam ring 21 is initiated.
  • the striking element 19 transmits the spring-cam percussion mechanism 20 generated axial impact on the in turn Tool holder clamped drilling tool.
  • the single impact energy of the axial generated by the spring cam mechanism 20 Blows depends on the preload of the spring 23 and the one that defines the stroke Height of the cams 27, 28 from.
  • the spring-cam percussion mechanism is preferably for Generation of axial impacts with a single impact energy of approximately 0.03 J to about 0.3 J.
  • the stroke frequency of the axial strokes depends on the number of in the circumferential direction interacting cams 27, 28 on the cam disc 21 or on the percussion piston 22.
  • the axial strikes are preferably with a Impact frequency of about 50 Hz to about 700 Hz can be generated.
  • This can be used, for example, for drilling holes in steel or wood may be necessary, which are drilled only at high speed without axial impact support become. Further operating variants result from the optional activation of the first or second percussion.
  • the invention was based on the example of a hand drill with an electropneumatic Percussion mechanism and a spring-cam percussion mechanism explained.
  • Alternative versions other percussion combinations can also be used within the inventive concept provide.
  • an electro-pneumatic hammer mechanism is included can be combined with a ratchet hammer mechanism or a spring-loaded hammer mechanism.
  • the two mechanical striking mechanisms with different ones Have single impact energies and impact frequencies.
  • Two electropneumatic hammer mechanisms can also be used in one hand drill be provided with which axial strikes with different single impact energies and beat frequencies can be generated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling And Boring (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Earth Drilling (AREA)
EP99810637A 1998-07-25 1999-07-16 Machine à forer portable Expired - Lifetime EP0976505B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833650A DE19833650A1 (de) 1998-07-25 1998-07-25 Handbohrgerät
DE19833650 1998-07-25

Publications (3)

Publication Number Publication Date
EP0976505A2 true EP0976505A2 (fr) 2000-02-02
EP0976505A3 EP0976505A3 (fr) 2003-02-05
EP0976505B1 EP0976505B1 (fr) 2007-02-21

Family

ID=7875382

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99810637A Expired - Lifetime EP0976505B1 (fr) 1998-07-25 1999-07-16 Machine à forer portable

Country Status (5)

Country Link
US (1) US6196330B1 (fr)
EP (1) EP0976505B1 (fr)
JP (1) JP4380845B2 (fr)
CN (1) CN1247783A (fr)
DE (2) DE19833650A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2522466A3 (fr) * 2011-05-12 2018-03-14 HILTI Aktiengesellschaft Machine-outil portative

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DE10103141A1 (de) * 2001-01-24 2002-07-25 Hilti Ag Elektrohandwerkzeuggerät mit Leerschlagabschaltung
US7096972B2 (en) * 2002-09-17 2006-08-29 Orozco Jr Efrem Hammer drill attachment
DE10318798B4 (de) * 2003-04-25 2006-01-26 Robert Bosch Gmbh Bohrgerät
EP1504852B1 (fr) * 2003-08-06 2010-04-21 Hitachi Koki Co., Ltd. Perceuse à percussion
JP4200918B2 (ja) * 2004-02-09 2008-12-24 日立工機株式会社 穿孔機
US7609621B1 (en) * 2004-02-10 2009-10-27 Sameer Kanagala Automatic protection network switching
DE102004025951A1 (de) * 2004-05-27 2005-12-22 Robert Bosch Gmbh Handwerkzeugmaschine, insbesondere Bohr- und/oder Schlaghammer
GB2435442A (en) * 2006-02-24 2007-08-29 Black & Decker Inc Powered hammer with helically shaped vent channel
DE102006035410B4 (de) * 2006-11-08 2015-06-03 Hilti Aktiengesellschaft Positioniervorrichtung mit Auslösevermittlung für ein handgeführtes Setzgerät
DE102006059633B4 (de) * 2006-12-14 2016-12-01 Robert Bosch Gmbh Schlagbohrmaschine
US7806198B2 (en) 2007-06-15 2010-10-05 Black & Decker Inc. Hybrid impact tool
US7789167B2 (en) * 2008-04-16 2010-09-07 The Boeing Company Power assist lever arm attachment
EP2127820A1 (fr) * 2008-05-26 2009-12-02 Max Co., Ltd. Outil d'enfoncement
US9193053B2 (en) 2008-09-25 2015-11-24 Black & Decker Inc. Hybrid impact tool
US8631880B2 (en) * 2009-04-30 2014-01-21 Black & Decker Inc. Power tool with impact mechanism
DE102009046479A1 (de) * 2009-11-06 2011-05-19 Hilti Aktiengesellschaft Handwerkzeugmaschine
US8002692B2 (en) * 2009-12-16 2011-08-23 Coloplast A/S Method of preparing a penis for implantation of a penile prosthetic
US8460153B2 (en) 2009-12-23 2013-06-11 Black & Decker Inc. Hybrid impact tool with two-speed transmission
US8584770B2 (en) 2010-03-23 2013-11-19 Black & Decker Inc. Spindle bearing arrangement for a power tool
CN102913127A (zh) * 2011-08-04 2013-02-06 黄石市诚林气动机械有限公司 多功能气动冲击钻
DE102012209446A1 (de) * 2012-06-05 2013-12-05 Robert Bosch Gmbh Handwerkzeugmaschinenvorrichtung
US9630307B2 (en) 2012-08-22 2017-04-25 Milwaukee Electric Tool Corporation Rotary hammer
WO2016172480A1 (fr) * 2015-04-22 2016-10-27 Milwaukee Electric Tool Corporation Perceuse à percussion
DE102015226410A1 (de) * 2015-12-22 2017-06-22 Robert Bosch Gmbh Handwerkzeugmaschine
CN105415294A (zh) * 2015-12-28 2016-03-23 河南广度超硬材料有限公司 一种带有励磁装置的冲击钻
CN107336198B (zh) * 2017-07-24 2021-01-12 苏州艾乐蒙特机电科技有限公司 一种变行程的冲击电锤
CN107470598A (zh) * 2017-08-15 2017-12-15 合肥众望电气科技有限公司 一种方便铸件毛坯除砂装置
EP3854532A1 (fr) * 2019-08-19 2021-07-28 Hilti Aktiengesellschaft Machine-outil, outil et système de machine-outil à un certain rapport de vitesse de rotation et de puissance de percussion
KR102274240B1 (ko) 2020-02-21 2021-07-08 한국항공우주산업 주식회사 수공구용 위치 감지 조립체
CN115255426B (zh) * 2022-07-15 2024-04-19 东风汽车集团股份有限公司 一种去除焊点的定心旋转动力钻具及焊点去除方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2522466A3 (fr) * 2011-05-12 2018-03-14 HILTI Aktiengesellschaft Machine-outil portative

Also Published As

Publication number Publication date
US6196330B1 (en) 2001-03-06
JP2000042817A (ja) 2000-02-15
DE59914206D1 (de) 2007-04-05
EP0976505B1 (fr) 2007-02-21
DE19833650A1 (de) 2000-01-27
EP0976505A3 (fr) 2003-02-05
JP4380845B2 (ja) 2009-12-09
CN1247783A (zh) 2000-03-22

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