EP0463416B1 - Foreuse à percussion électrique - Google Patents

Foreuse à percussion électrique Download PDF

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Publication number
EP0463416B1
EP0463416B1 EP91109155A EP91109155A EP0463416B1 EP 0463416 B1 EP0463416 B1 EP 0463416B1 EP 91109155 A EP91109155 A EP 91109155A EP 91109155 A EP91109155 A EP 91109155A EP 0463416 B1 EP0463416 B1 EP 0463416B1
Authority
EP
European Patent Office
Prior art keywords
drilling machine
machine according
shift lever
spindle
impact drilling
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.)
Expired - Lifetime
Application number
EP91109155A
Other languages
German (de)
English (en)
Other versions
EP0463416A1 (fr
Inventor
Joerg Faelchle
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 EP0463416A1 publication Critical patent/EP0463416A1/fr
Application granted granted Critical
Publication of EP0463416B1 publication Critical patent/EP0463416B1/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
    • B25D16/006—Mode changers; Mechanisms connected thereto
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2216/00—Details of 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
    • B25D2216/0007—Details of percussion or rotation modes
    • B25D2216/0023—Tools having a percussion-and-rotation mode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2216/00—Details of 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
    • B25D2216/0007—Details of percussion or rotation modes
    • B25D2216/0038—Tools having a rotation-only mode
    • 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
    • B25D2250/005—Adjustable tool components; Adjustable parameters
    • B25D2250/011—Bits, e.g. adjusting bits by setting in the desired angular position

Definitions

  • the impact drill according to the invention with the characterizing features of claim 1 has the advantage that it can be switched over to the operating modes rotary drilling, impact drilling and chiseling with and without spindle lock by user-friendly and easy-to-use switching elements.
  • a locking pin for the spindle lock that works together with the shift lever for switching the operating mode is particularly advantageous. This is under spring force and automatically returns to its rest position before switching on the rotary drive. Resilient switching elements enable the speed to be switched even during operation.
  • the rotatable arrangement of gearwheels on the spindle which can be switched by means of an axially displaceable coupling ring, enables the switching elements for the operating mode switchover and the spindle lock to be coupled in a particularly simple manner.
  • Figure 1 shows a longitudinal section through an impact drill
  • Figure 2 shows a cross section through the switching elements.
  • An impact drill with an electric drive motor (not shown further) has a housing 2, from which a tool holder 3 protrudes at the front.
  • the tool holder 3 is connected to a rotationally driven spindle 4, within which a pneumatic hammer mechanism 5 is accommodated. Impacts of the striking mechanism 5 generated in the axial direction of the spindle 4 are transmitted to a tool, not shown, which is inserted into the tool holder 3.
  • the striking mechanism 5 is driven by a wobble mechanism 6 known per se from rotary hammers, which has a rotary drive element 7 and a piston 8 driven to and fro.
  • the rotary drive member 7 carries part of a clutch 10, the other part of which is arranged on a switching sleeve 11.
  • the shift sleeve 11 is rotatably driven by an intermediate shaft 12 driven by a motor pinion 9 and is axially displaceable thereon.
  • the switching sleeve 11 carries a collar 13 on which an annular thrust bearing 14, which is pushed over the spindle 4, bears.
  • the intermediate shaft 12 carries two spaced-apart, firmly connected gears 16 and 17 of different diameters.
  • the gears 16 and 17 are in constant engagement with two rotatably but axially fixed gears 18 and 19 on the spindle 4.
  • the spindle 4 rotatably but axially displaceably carries a coupling ring 20, which has a coupling toothing 21 facing each of the gears.
  • the clutch teeth 21 engage in counter teeth 22 and 23 on the gears 18 and 19.
  • the coupling ring 20 has a locking toothing 24, into which a locking pin 25 which is seated in a rotationally fixed manner in the housing 2 can be latched.
  • a two-legged shift fork 27 acts on the clutch ring 20 and is pressed by a compression spring 28 against a first annularly closed control cam 30 of a shift lever 31.
  • One leg 32 of the shift fork 27 is slidably mounted relative to the other and is urged against the coupling ring 20 by a spring 33.
  • the shift lever 31 has a handle 35 protruding from the housing 2 and can be rotated about an axis 36 running perpendicular to the housing plane.
  • the shift lever 31 has, as the first control cam 30, an annular groove, the bottom of which describes approximately a semicircular line.
  • the bottom of the groove has a large distance measured on two of four sides from the axis 36, so that the coupling ring 20 couples into the gear 19 for slow gear, on one side a medium-sized distance, so that neither of the two gears 18, 19 with the spindle 4 are coupled and on the fourth side a small distance from the axis 36, so that the gear 18 is coupled to the coupling ring 20.
  • the control curve 30 is designed such that when turning from the chisel position shown in FIG. 1 without a rotary drive, the shift fork 27 initially does not move, so that a holding extension 39 attached laterally to the locking pin 25 and held down by a nose 38 on the shift lever 31 is released.
  • the control curve 30 has a flattened curve section 40.
  • the shift lever 31 has a second closed control cam, which is designed as a protruding plate 42 with two narrow and two long sides.
  • the control cam or plate 32 works together with the thrust bearing 14.
  • the long sides of the plate 42 lie parallel to the thrust bearing 14, so that the clutch 10 is engaged. If the narrow sides of the plate 42 are parallel to the thrust bearing 14, the clutch 10 disengages due to the force of a clutch spring 43 and the rotary drive member 7 stands still.
  • the shift lever 31 and the locking pin 25 can be selected from five different modes of operation of the impact drill.
  • Figure 1 and 2 pure hitting with spindle lock is shown. If the locking pin 25 is not pressed in, then with the same position of the shift lever 31, a striking operation takes place with a freely rotatable spindle 4.
  • the shift lever 31 By turning the shift lever 31 clockwise by 90 degrees, the locking pin 25 jumps out from under the nose 38, then the shift fork is opened in the direction the tool holder 3 moved so that the coupling teeth 21 engages in the counter teeth 23 of the gear 19.
  • the thrust bearing 14 is displaced in the direction of the tool holder 3 via the control cam 42, so that the striking mechanism 5 disengages. In this position, rotary drilling is possible at a slow speed.
  • a further rotation of the shift lever 31 by 90 degrees in a clockwise direction results in the hammer mechanism 5 being switched on, which means that hammer drilling is now possible at slow speed.
  • the striking mechanism 5 is switched off again and the shift fork is pushed to the left by the force of the compression spring 28 away from the tool holder 3, so that the coupling toothing 21 in the counter toothing 22 of the gearwheel 18 snaps into place.
  • rotary drilling is possible at a fast turning speed.
  • hammer drilling with a fast rotation speed cannot be selected, as this could overload the motor.
  • the shift lever 31 is not firmly coupled to the shift fork 27.
  • the springs 28 and 33 ensure when the gears 18 and 19 are switched on that the shift lever 31 can also be turned into its desired position when the toothings 21/22 and 21/23 are tooth-to-tooth.
  • the sprung leg 32 or the sprung shift fork 27 itself only push the clutch ring 20 sideways when the clutch teeth 21 can engage in the respective counter teeth 22 or 23.
  • the shift lever 31 and the control cams 30, 42 are designed so that the shift lever can be rotated as far as desired in both directions of rotation, that is to say the desired mode of operation can be selected in the shortest possible way.
  • the invention is not limited to the exemplary embodiment shown.
  • other two-speed transmission types can also be used, which can also be shifted by a longitudinal displacement of a shift element controlled by the control cam of a shift lever.
  • the invention is particularly applicable to pneumatic rotary hammers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling And Boring (AREA)
  • Percussive Tools And Related Accessories (AREA)

Claims (9)

  1. Perceuse électrique à percussion ou marteau pneumatique avec un élément de commutation qui rend possible au moins deux vitesses de rotation distinctes de l'axe (4) et un mécanisme de percussion (5) débrayable le régime de percussion ainsi que le mécanisme de percussion (5) étant commutés par un seul levier de commutation (31) présentant deux courbes de commande (30, 42), caractérisée en ce que le mode de rotation est mis en marche ou arrêté par l'intermédiaire de l'une des courbes (30, 42) qui agit sur une bague d'embrayage (20) mobile entre l'axe (4) et l'arbre intermédiaire (12) entraîné par le moteur, et la rotation de l'axe (4) peut être arrêtée en actionnant sélectivement une tige de blocage (25) travaillant avec la bague d'embrayage.
  2. Perceuse à percussion selon la revendication 1 caractérisée en ce que la tige de blocage (25) coopère avec un bec (38) du levier de commutation (31).
  3. Perceuse à percussion selon la revendication 1 ou 2, caractérisée en ce que la tige de blocage (25) retourne d'elle-même dans sa position de repos dans l'axe (4) de sa position de blocage lors du choix du régime de rotation.
  4. Perceuse à percussion selon l'une des revendications précédentes, caractérisée en ce que le mécanisme de commutation comporte deux roues dentées (18, 19) situées sur l'axe (4) et une bague d'embrayage (20) située entre celles-ci, solidaire en rotation de l'axe (4) mais pouvant coulisser axialement.
  5. Perceuse à percussion selon les revendications 1 ou 4, caractérisée en ce que le mécanisme de commutation comporte des organes de commutation (27, 32) maintenus par des ressorts entre le levier de commutation (31) et la bague d'embrayage à commuter (20).
  6. Perceuse à percussion selon l'une des revendications précédentes, caractérisée en ce que le mécanisme de percussion (5) est un mécanisme de marteau pneumatique.
  7. Perceuse à percussion selon une des revendications précédentes, caractérisée en ce que le levier de commutation (31) présente une première courbe de commande annulaire (30) et une seconde courbe de commande (42) en forme de plaque.
  8. Perceuse à percussion d'après la revendication 7 caractérisée en ce que la première courbe de commande (30) sert à la commutation de la vitesse de rotation en travaillant avec une fourchette (27) et présente une section de courbe (40) qui actionne, lors de la rotation du levier de commutation (31), une courbe à vide de la fourchette (27) durant laquelle la tige de blocage vient hors de sa position de blocage.
  9. Perceuse à percussion d'après la revendication 7, caractérisée en ce que la courbe de commande (42) s'enclenche dans un embrayage (10) à un élément d'entraînement en rotation (7) du mécanisme de percussion (5) et ce lors de l'alternance et la coupure du levier de commutation (31).
EP91109155A 1990-06-26 1991-06-05 Foreuse à percussion électrique Expired - Lifetime EP0463416B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4020269A DE4020269A1 (de) 1990-06-26 1990-06-26 Elektrische schlagbohrmaschine
DE4020269 1990-06-26

Publications (2)

Publication Number Publication Date
EP0463416A1 EP0463416A1 (fr) 1992-01-02
EP0463416B1 true EP0463416B1 (fr) 1993-09-29

Family

ID=6409073

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91109155A Expired - Lifetime EP0463416B1 (fr) 1990-06-26 1991-06-05 Foreuse à percussion électrique

Country Status (2)

Country Link
EP (1) EP0463416B1 (fr)
DE (2) DE4020269A1 (fr)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003523835A (ja) * 2000-02-19 2003-08-12 シンテイラ アクチエンゲゼルシヤフト 工具機械
DE19528924B4 (de) * 1995-08-05 2005-01-27 Scintilla Ag Elektrische Schlagbohrmaschine
US7717192B2 (en) 2007-11-21 2010-05-18 Black & Decker Inc. Multi-mode drill with mode collar
US7717191B2 (en) 2007-11-21 2010-05-18 Black & Decker Inc. Multi-mode hammer drill with shift lock
US7735575B2 (en) 2007-11-21 2010-06-15 Black & Decker Inc. Hammer drill with hard hammer support structure
US7762349B2 (en) 2007-11-21 2010-07-27 Black & Decker Inc. Multi-speed drill and transmission with low gear only clutch
US7770660B2 (en) 2007-11-21 2010-08-10 Black & Decker Inc. Mid-handle drill construction and assembly process
US7798245B2 (en) 2007-11-21 2010-09-21 Black & Decker Inc. Multi-mode drill with an electronic switching arrangement
US7854274B2 (en) 2007-11-21 2010-12-21 Black & Decker Inc. Multi-mode drill and transmission sub-assembly including a gear case cover supporting biasing
CN102626913A (zh) * 2011-02-01 2012-08-08 株式会社牧田 作业工具
CN102632481A (zh) * 2011-02-13 2012-08-15 南京德朔实业有限公司 电锤
CN102649266A (zh) * 2012-04-16 2012-08-29 制尚电器(浙江)有限公司 一种多功能双速电锤
CN102873669A (zh) * 2012-10-15 2013-01-16 浙江恒友机电有限公司 一钮多功能切换结构

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4305965C2 (de) * 1993-02-26 1997-08-21 Kress Elektrik Gmbh & Co Schaltvorrichtung zur Spindelarretierung für Elektrowerkzeuge
DE4406841C1 (de) * 1994-03-02 1995-04-20 Metabowerke Kg Hammerbohrmaschine
DE19545260A1 (de) * 1995-11-24 1997-05-28 Black & Decker Inc Bohrhammer
DE10240361A1 (de) * 2002-09-02 2004-03-11 Hilti Ag Drehende und schlagende Elektrohandwerkzeugmaschine
JP5055749B2 (ja) * 2005-11-16 2012-10-24 マックス株式会社 ハンマドリル
DE102011103104B4 (de) 2011-05-25 2019-03-28 Sew-Eurodrive Gmbh & Co Kg Kupplung für ein Getriebe, Getriebe mit einer Kupplung, Laufkatze für eine Elektrohängebahn mit einem Getriebe
JP6325360B2 (ja) * 2014-06-12 2018-05-16 株式会社マキタ 打撃工具

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1957235C3 (de) * 1969-11-14 1974-04-25 Robert Bosch Gmbh, 7000 Stuttgart Motorisch angetriebene Schlagbohrmaschine
DE2728961C2 (de) * 1977-06-27 1991-08-08 Hilti Ag, Schaan Bohrhammer mit arretierbarem Werkzeughalter
GB2086791B (en) * 1980-11-11 1984-05-31 Wolf Electric Tools Ltd Portable power-operated drill
GB2121717B (en) * 1982-06-02 1985-09-18 Black & Decker Inc Improvements in or relating to rotary percussive drills
DE3321762A1 (de) * 1982-08-12 1984-02-16 Black & Decker Inc., 19711 Newark, Del. Bohrhammer
DE3538166A1 (de) * 1985-10-26 1987-04-30 Hilti Ag Bohrhammer mit dreharretierung
DE3807078A1 (de) * 1988-03-04 1989-09-14 Black & Decker Inc Bohrhammer

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19528924B4 (de) * 1995-08-05 2005-01-27 Scintilla Ag Elektrische Schlagbohrmaschine
JP2003523835A (ja) * 2000-02-19 2003-08-12 シンテイラ アクチエンゲゼルシヤフト 工具機械
JP4933713B2 (ja) * 2000-02-19 2012-05-16 シンテイラ アクチエンゲゼルシヤフト 工具機械
US7854274B2 (en) 2007-11-21 2010-12-21 Black & Decker Inc. Multi-mode drill and transmission sub-assembly including a gear case cover supporting biasing
US8109343B2 (en) 2007-11-21 2012-02-07 Black & Decker Inc. Multi-mode drill with mode collar
US7762349B2 (en) 2007-11-21 2010-07-27 Black & Decker Inc. Multi-speed drill and transmission with low gear only clutch
US7770660B2 (en) 2007-11-21 2010-08-10 Black & Decker Inc. Mid-handle drill construction and assembly process
US7798245B2 (en) 2007-11-21 2010-09-21 Black & Decker Inc. Multi-mode drill with an electronic switching arrangement
US7717191B2 (en) 2007-11-21 2010-05-18 Black & Decker Inc. Multi-mode hammer drill with shift lock
US7987920B2 (en) 2007-11-21 2011-08-02 Black & Decker Inc. Multi-mode drill with mode collar
US7735575B2 (en) 2007-11-21 2010-06-15 Black & Decker Inc. Hammer drill with hard hammer support structure
US7717192B2 (en) 2007-11-21 2010-05-18 Black & Decker Inc. Multi-mode drill with mode collar
CN102626913A (zh) * 2011-02-01 2012-08-08 株式会社牧田 作业工具
CN102632481A (zh) * 2011-02-13 2012-08-15 南京德朔实业有限公司 电锤
CN102632481B (zh) * 2011-02-13 2014-12-10 南京德朔实业有限公司 电锤
CN102649266A (zh) * 2012-04-16 2012-08-29 制尚电器(浙江)有限公司 一种多功能双速电锤
CN102649266B (zh) * 2012-04-16 2015-04-08 制尚电器(浙江)有限公司 一种多功能双速电锤
CN102873669A (zh) * 2012-10-15 2013-01-16 浙江恒友机电有限公司 一钮多功能切换结构

Also Published As

Publication number Publication date
DE4020269A1 (de) 1992-01-02
EP0463416A1 (fr) 1992-01-02
DE59100422D1 (de) 1993-11-04

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