EP0373106B1 - Outil à main avec boîte d'engrenage - Google Patents

Outil à main avec boîte d'engrenage Download PDF

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Publication number
EP0373106B1
EP0373106B1 EP89810887A EP89810887A EP0373106B1 EP 0373106 B1 EP0373106 B1 EP 0373106B1 EP 89810887 A EP89810887 A EP 89810887A EP 89810887 A EP89810887 A EP 89810887A EP 0373106 B1 EP0373106 B1 EP 0373106B1
Authority
EP
European Patent Office
Prior art keywords
cams
pickup
slide
hand tool
engagement openings
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
EP89810887A
Other languages
German (de)
English (en)
Other versions
EP0373106A3 (fr
EP0373106A2 (fr
Inventor
Erwin Manschitz
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 EP0373106A2 publication Critical patent/EP0373106A2/fr
Publication of EP0373106A3 publication Critical patent/EP0373106A3/fr
Application granted granted Critical
Publication of EP0373106B1 publication Critical patent/EP0373106B1/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
    • 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
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/195—Regulation means
    • B25D2250/201—Regulation means for speed, e.g. drilling or percussion speed

Definitions

  • the invention relates to a hand tool with a manual transmission, which has gear wheels arranged on an output shaft, which can optionally be coupled in a rotationally locking manner to the output shaft by means of a switching element, a slider which can be actuated by means of a rotatable handle being provided for the switching element, and the slide in the direction of displacement arranged one behind the other, to the handle open engagement openings and the handle around its axis of rotation arranged at the same radial distance driving cams, the division of the engagement openings corresponds to the chord of the arc between the driving cams and the engagement openings in an overlapping position with the movement path of the Driving cams can be brought.
  • DE-PS 1 602 712 shows a drilling machine with a two-speed gearshift.
  • a switching element is actuated by means of a slide which optionally couples one of two gearwheels to an output shaft in a rotationally locking manner.
  • the slide connected to the switching element is actuated from the outside by a rotatable handle.
  • a driving cam arranged eccentrically to the axis of rotation of the handle engages with a closed slot in the slide. Twisting the handle will move the slide.
  • the respective switching position is maintained by means of a ball catch that interacts with the handle.
  • This embodiment has the disadvantage that the handle only moves the slide by a small displacement according to the eccentric arrangement of the driving cam, which is why the known arrangement for switching a multi-speed transmission with a correspondingly larger displacement is not suitable.
  • the solutions known from other subject areas, which are used to apply larger displacement paths, are so susceptible to faults that they are also unsuitable for the purpose in question here.
  • a rotary hammer which has a motor-driven, switchable, multi-stage gear for the rotary drive of a tool holder.
  • Three gear wheels are arranged side by side and axially fixed on a gearshift shaft of the transmission.
  • At least two of the gears are rotatably seated on the selector shaft and can be connected to it via a pulling wedge.
  • the pulling wedge is displaced via a toothed rack, in which a pinion connected in a rotationally fixed manner with a rotary knob engages. By turning the rotary knob there is an axial displacement of the rack and thus also of the pull wedge.
  • the invention has for its object to provide an operating device for a hand tool for the manual transmission, which is characterized by large achievable displacement, economy and susceptibility to failure.
  • the object is achieved in that the slide is designed as a C-profile and the engagement openings are arranged on one leg of the C-profile, open towards the opposite leg.
  • the C-profile enables the handle to be held in a form-fitting manner and displaceable in the axis of rotation, so that separate holding means can be dispensed with.
  • a C-profile can be produced economically using the bending process.
  • the engagement openings that are open toward the handle allow the driving cams to engage in the engagement openings in succession while the handle is being rotated.
  • two or more engagement openings and driving cams are provided.
  • the formation and arrangement of the engagement openings and driving cams requires considerably lower manufacturing costs compared to gears.
  • the driving cams are preferably arranged at an arc angle of 60 ° to 90 ° to one another. This angular displacement of the driving cams ensures, on the one hand, a functionally reliable engagement in the engagement openings and, on the other hand, a large displacement distance per driving cams is achieved.
  • the driving cams and thus also the engagement openings are so far apart that large tolerances are possible, which in turn contributes to low manufacturing costs and less susceptibility to faults.
  • the driving cams advantageously extend parallel to the axis of rotation. This arrangement enables a compact design, which is what is striven for in hand tools. Such driving cams extending parallel to the axis of rotation lead to advantages in particular with the design of the slide according to the invention.
  • the hammer drill shown in Fig. 1 has a housing 1 with a protruding from the opposite direction of drilling Handle 2.
  • the handle 2 has an electrical on-off switch 3.
  • the housing 1 is adjoined by a tool holder 4 which is rotatable relative to the housing 1.
  • a side handle 5 protrudes from the housing 1 near the tool holder 4.
  • a striking mechanism chamber 6, an engine chamber 7 and a transmission chamber 8 are accommodated in the housing 1.
  • Fig. 2 is essentially a three-speed gear for optional adjustment of the speed to be transmitted to the tool holder 4 and a striking mechanism for generating blows can be seen, which are conveyed to a tool inserted in the tool holder 4.
  • the percussion mechanism has an excitation piston 9 and a percussion piston 11, which is set in a reciprocating motion in a known manner with the interposition of an air cushion in a guide cylinder 12.
  • the excitation piston 9 is in turn set in a reciprocating motion by a connecting rod 13.
  • the connecting rod 13 is driven by a crankshaft 14 on which a drive wheel 15 sits in a rotationally fixed manner.
  • the drive wheel 15 is driven by a pinion 16 which is arranged on a motor shaft 17.
  • the motor shaft 17 also carries an impeller 18 for cooling purposes.
  • the guide cylinder 12 is rotatably supported relative to the housing 1, a bevel gear 19 seated on the guide cylinder 12 imparting rotational movement to the guide cylinder 12.
  • the rotary movement is transmitted from the guide cylinder 12 to the tool holder 4 and from there to a clamped tool.
  • the three-speed transmission has an output shaft 21 which is rotatably mounted in the housing. At the end, this carries a bevel pinion 22 which meshes with the bevel gear 19. On the output shaft 21, three differently sized gears 23, 24, 25 are arranged freely rotatable next to each other. The toothed wheels 23, 24, 25 mesh with toothed rings 26, 27, 28, which are non-rotatably seated on a shaft 29 rotatably mounted in the housing 1.
  • the largest ring gear 28 is in engagement with the pinion 16, so that rotary motion is transmitted from the motor shaft 17 via the ring gears 26, 27, 28 to the gears 23, 24, 25.
  • Each of the gears 23, 24, 25 has a dog gear ring 23a, 24a, 25a surrounding the output shaft 21.
  • the dog gear rings 23a, 24a, 25a are axially spaced apart.
  • a switching element 31 is slidably mounted in the output shaft 21 having a central bore.
  • the switching element 31 has a sliding pin 32 and a transverse pin 33 fixed therein.
  • the transverse pin 33 extends through longitudinal slots 21a in the output shaft 21 and projects with the end sections into the axial projection of the dog gear rings 23a, 24a, 25a. 2, the cross pin 33 engages with the end portions in the claw gear ring 25a. This creates a rotational connection between the gear 25 and the output shaft 21.
  • the cross pin 33 can optionally also be brought into engagement with the other dog gear rings 24a, 23a. Different speeds can thereby be transmitted to the bevel gear 19.
  • An externally adjustable actuating device 34 is used to move the switching element 31.
  • This has a slide 35 which is suspended on the end in the sliding bolt 32.
  • a rotatable handle 36 in the form of a switching knob is connected to the other end region of the slide 35.
  • the handle 36 has driving cams 37a, 37b arranged at a radial distance from the fulcrum, as can be seen in FIG. 3.
  • the driving cams 37a, 37b successively enter engagement openings 38a, 38b, which are open on one side, on one leg 38 of the slider 35 consisting of a C-profile.
  • the pitch T of the engagement openings 38a, 38b corresponds to the chord of the arch 1 between the driving cams 37a, 37b.
  • the arc angle a between the driving cams 37a, 37b is 60 °.
  • the displacement path that can be achieved in this way is greater by the dimension of the pitch T than if only one driving cam is available for displacement. As shown, this means that a multi-speed transmission can also be shifted, the gears being identified by symbols "1, 2, 3".
  • the actuating device 34 also has a guide part 39 which is fixed relative to the housing 1. This serves on the one hand as a pivot bearing for the handle 36, as shown in FIG. 4, and on the other hand projects for guiding purposes with strip-like projections 39a between the legs 38, 38 'of the slide 35, as shown in FIGS. 2, 3 and 5.
  • the slide 35 is also guided in an annular groove 36a of the handle 36, as can be seen in FIG. 4.

Landscapes

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

Claims (4)

  1. Outil à main avec boîte de vitesses, comprenant des roues dentées (23, 24, 25) montées sur un arbre de sortie (21) et pouvant être couplées de manière rigide en rotation avec l'arbre de sortie (21) par un organe de commande, un coulisseau (35) commandé par une manette tournante (36) étant prévu pour l'organe de commande (31), le coulisseau (35) présentant des ouvertures d'engagement (38a, 38b) disposées les unes derrière les autres dans la direction de déplacement et ouvertes vers la manette, et la manette (36) comportant des ergots d'entraînement (37a, 37b) disposés à intervalles radiaux réguliers autour de l'axe de rotation de ladite manette, le pas (T) des ouvertures d'engagement (38a, 38b) correspondant à la corde de l'arc (1) entre les ergots d'entraînement (37a, 37b) et les ouvertures d'engagement (38a, 38b) pouvant être mises en coïncidence avec la trajectoire de déplacement des ergots d'entraînement (37a, 37b), caractérisé en ce que le coulisseau (35) est conformé en profil en C et que les ouvertures d'engagement (38a, 38b) sont prévues sur l'une des branches (38) du profil en C et ouvertes en direction de la branche (38') opposée.
  2. Outil à main selon la revendication 1, caractérisé en ce que les ergots d'entraînement (37a, 37b) sont disposés les uns par rapport aux autres sous un angle d'arc (a) de 60° à 90°.
  3. Outil à main selon l'une des revendications 1 ou 2, caractérisé en ce que les ergots d'entraînement (37a, 37b) s'étendent parallèlement à l'axe de rotation.
  4. Outil à main selon l'une des revendications 1 à 3, caractérisé en ce qu'il comprend deux ergots d'entraînement (37a, 37b) et deux ouvertures d'engagement (38a, 38b).
EP89810887A 1988-12-09 1989-11-20 Outil à main avec boîte d'engrenage Expired - Lifetime EP0373106B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3841515A DE3841515A1 (de) 1988-12-09 1988-12-09 Handwerkzeug mit schaltgetriebe
DE3841515 1988-12-09

Publications (3)

Publication Number Publication Date
EP0373106A2 EP0373106A2 (fr) 1990-06-13
EP0373106A3 EP0373106A3 (fr) 1991-05-08
EP0373106B1 true EP0373106B1 (fr) 1994-01-19

Family

ID=6368804

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89810887A Expired - Lifetime EP0373106B1 (fr) 1988-12-09 1989-11-20 Outil à main avec boîte d'engrenage

Country Status (4)

Country Link
US (1) US4998588A (fr)
EP (1) EP0373106B1 (fr)
JP (1) JPH02190205A (fr)
DE (2) DE3841515A1 (fr)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4013512A1 (de) * 1990-04-27 1991-10-31 Black & Decker Inc Schalteinrichtung zum umschalten eines kraftgetriebenen werkzeugs
US5320177A (en) * 1992-03-30 1994-06-14 Makita Corporation Power driven hammer drill
DE4415348A1 (de) * 1994-05-02 1995-11-09 Hilti Ag Bohr- und Meisselgerät
DE19950759A1 (de) * 1999-10-21 2001-04-26 Bosch Gmbh Robert Bohrhammer
DE10034768A1 (de) * 2000-07-18 2002-02-07 Bosch Gmbh Robert Elektrokombihammer
DE10108124A1 (de) * 2001-02-21 2002-08-29 Hilti Ag Modenwahldrehschalter für ein Handwerkzeuggerät
DE10111748A1 (de) * 2001-03-12 2002-09-19 Hilti Ag Schaltwerk für ein kombiniertes Handwerkzeuggerät
DE10127103B4 (de) * 2001-06-02 2008-08-21 Robert Bosch Gmbh Werkzeughalterung
GB2385017B (en) * 2002-02-08 2005-06-29 Black & Decker Inc Drilling and/or hammering tool
GB0214772D0 (en) * 2002-06-26 2002-08-07 Black & Decker Inc Hammer
DE10240361A1 (de) * 2002-09-02 2004-03-11 Hilti Ag Drehende und schlagende Elektrohandwerkzeugmaschine
GB0311045D0 (en) * 2003-05-14 2003-06-18 Black & Decker Inc Rotary hammer
DE102004045117A1 (de) * 2004-09-17 2006-03-23 Robert Bosch Gmbh Schaltvorrichtung
EP1674743B1 (fr) * 2004-12-23 2014-01-22 Black & Decker Inc. Mécanisme d'entraînement pour outil motorisé
EP1674207B1 (fr) * 2004-12-23 2008-12-10 BLACK & DECKER INC. Outil motorisé
US7469752B2 (en) * 2005-12-02 2008-12-30 Makita Corporation Power tool
DE102007009986A1 (de) * 2007-03-02 2008-09-04 Robert Bosch Gmbh Handwerkzeugmaschine
GB2471643B (en) * 2008-05-09 2013-04-17 Milwaukee Electric Tool Corp Auxiliary handle for use with a power tool
EP2857149A1 (fr) * 2013-10-03 2015-04-08 HILTI Aktiengesellschaft Machine-outil manuelle
US11084006B2 (en) 2017-03-23 2021-08-10 Milwaukee Electric Tool Corporation Mud mixer

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US994627A (en) * 1910-05-23 1911-06-06 James A Workman Sr Mechanical movement.
DE1938660C3 (de) * 1969-07-30 1975-05-15 Metabowerke Kg, Closs, Rauch & Schnizler, 7440 Nuertingen Schlagbohrhammer
DE3538166A1 (de) * 1985-10-26 1987-04-30 Hilti Ag Bohrhammer mit dreharretierung

Also Published As

Publication number Publication date
EP0373106A3 (fr) 1991-05-08
DE58906768D1 (de) 1994-03-03
EP0373106A2 (fr) 1990-06-13
JPH02190205A (ja) 1990-07-26
US4998588A (en) 1991-03-12
DE3841515A1 (de) 1990-06-13

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