EP0445636B1 - Marteau actionné par électricité - Google Patents

Marteau actionné par électricité Download PDF

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Publication number
EP0445636B1
EP0445636B1 EP91102887A EP91102887A EP0445636B1 EP 0445636 B1 EP0445636 B1 EP 0445636B1 EP 91102887 A EP91102887 A EP 91102887A EP 91102887 A EP91102887 A EP 91102887A EP 0445636 B1 EP0445636 B1 EP 0445636B1
Authority
EP
European Patent Office
Prior art keywords
handle
linkage
hand tool
tool according
switching latch
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
EP91102887A
Other languages
German (de)
English (en)
Other versions
EP0445636A1 (fr
Inventor
Ulrich Dipl.-Ing. Mütschele
Karl Dr. Ing. Wanner
Johann Kaltenecker
Gerhard Meixner
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 EP0445636A1 publication Critical patent/EP0445636A1/fr
Application granted granted Critical
Publication of EP0445636B1 publication Critical patent/EP0445636B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
    • H01H21/02—Details
    • H01H21/04—Cases; Covers
    • H01H21/10—Casing of switch constituted by a handle serving a purpose other than the actuation of the switch
    • 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
    • B25D17/04—Handles; Handle mountings

Definitions

  • the invention relates to an electrically operated hand tool according to the preamble of claim 1.
  • a rotary hammer which has a closed handle and a switch arranged therein with a handle having. This means that the electrical lines from the switch to the motor must be passed through the handle. The power cord is also inserted into the handle.
  • This widespread design requires a lot of installation work for the cabling.
  • the hammer falls and is hit hard, there is a risk that the sensitive grip area will be damaged and live cables will subsequently be exposed. This can pose dangers to the operator.
  • the hand tool according to the invention with the characterizing features of claim 1 has the advantage that the manufacturing and assembly costs are significantly reduced.
  • the provision of a resilient connecting element between the pawl and linkage enables a simple articulated connection with an integral design of the pawl, linkage and connecting element.
  • Figure 1 shows a hammer in partial section
  • Figure 2 shows a cross section along line II-II in Figure 1.
  • a hammer drill 1 has a housing 2 made of plastic, which has a cylindrical housing part in which a motor 3 is housed. Furthermore, a striking mechanism 4, which is only indicated in the drawing, is contained in the housing 2 perpendicular to the motor 3. In an extension of the striking mechanism 4, a tool holder 5 with a drilling tool 6 is arranged in a manner known per se. At the end of the hammer opposite the tool holder, a handle 7 is fastened to the housing 2 with screws 8.
  • the handle 7 has the shape of a spade handle and consists of a frame 9 made of plastic, which has a substantially U-shaped cross section (see FIG. 2).
  • the handle 7 has webs 10 and a central web 11.
  • the handle 7 has in its grip part 12 gripped by the hand of the operator and in the upper web 10 and the central web 11 a circumferential central groove 13 which faces the housing 2.
  • the scaffold 9 is provided with an easily accessible elastic sheath 14, e.g. B. enclosed a foam material.
  • the whole handle 7 consists of an undivided solid part.
  • the webs 10, 11 form an upper 15 and a lower handle opening 16 for holding with both hands, so that a so-called double spade handle is created.
  • the handle openings 15, 16 are closed by a wall 17 facing the housing 2.
  • a closed frame 18 is inserted, which can be made of plastic or sheet metal.
  • the frame In the area of the grip part 12, the frame consists of 2 parallel tabs 19 and 20 which rest in the walls of the groove 13.
  • the two tabs 19, 20 each have a bore 21, 22 on the opposite side.
  • the tabs 19, 20 At the ends facing the handle part 12, the tabs 19, 20 each have an insertion slope 23, 24 on their inner side opposite each other.
  • the switching pawl 26 has two opposite pins 27, 28 which engage in the bores 21, 22 and thus form a pivot bearing for the switching pawl designed as a two-armed lever.
  • a manually operable actuating part 29 is arranged above the pins 27, 28.
  • a trigger part 30 with a free end 31 is formed below the pins 27, 28.
  • a resilient connecting element 32 runs parallel to the lever and is integrally connected to a linkage 34.
  • the linkage 34 runs in the central web 11 and has a contact piece 35 which bears against the free end 31.
  • the front end 36 of the linkage 34 is connected to a switch 37 for switching the hammer drill 1 on and off.
  • the linkage 34 and the contact piece 35 together with the free end 31 form means for transmitting the actuating force exerted on the pawl 26 to the switch 37.
  • This is housed outside of the handle 7 in or on the housing 2 of the hammer drill, advantageously in particular in the space between the handle 7 and the housing 2.
  • the switch 37 can also be attached to the wall 17 of the handle 7 facing the housing 2.
  • the switch 37 is designed as a non-latching pressure switch and is connected to a connecting cable 38 inserted into the housing 2.
  • the pawl and the linkage 34 firmly connected to it are first pressed in in the direction of arrow A, that is to say from the outside, between the tabs 19, 20 of the frame 18.
  • the pins 27, 28 slide over the insertion bevel 23, 24 until they snap into the bores 21, 22.
  • the frame 18 is inserted with the pawl 26 mounted in the direction of arrow B into the groove 13 of the handle 7.
  • the frame 18 closes the groove 13 in the connecting webs 10, 11.
  • the actuating part 29 is inserted into the groove 13 in the grip part 12.
  • the completely preassembled handle 7 is now attached to the housing 2 by means of the screws 8 screwed on.
  • the linkage 34 comes to lie exactly in front of the switch 37, so that the switch can be operated correctly.
  • the force is transmitted via the trigger part 30 to the free end 31 and from there passed on via the contact piece 35 to the linkage 34 acting as a push rod.
  • the free end 31 and the contact piece 35 are not rigidly coupled but are displaceable relative to one another, so that the rotary movement of the pawl 26 is transmitted without problems to the longitudinal movement of the linkage 34.
  • the cohesion of the pawl 26 and linkage 34 is brought about by the connecting element 32 which is integral with both parts.
  • the invention is not limited to the exemplary embodiment described.
  • the pawl can also be pushed in with longitudinal guides in the frame arranged in the handle instead of being rotatable.
  • the invention is also applicable to other power tools such as drills or screwdrivers.

Landscapes

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

Claims (7)

  1. Outil manuel commandé électriquement, en particulier marteau perforateur, avec un boîtier (2) dans lequel est placé un moteur (3), et avec une poignée (7) reliée au boîtier (2) et munie d'un cliquet de commande (26) pour actionner un interrupteur électrique (37) destiné à brancher et débrancher le moteur (3), l'interrupteur (37) étant logé dans la zone du boîtier (2), au-delà d'une ouverture de prise (15, 16) de la poignée (7), et une tringlerie (34) étant prévue pour transmettre la force du cliquet de commande (26) à l'interrupteur (37), caractérisé en ce que le cliquet de commande (26) est réalisé en levier à deux bras ayant comme premier bras une pièce de commande (29) et comme deuxième bras une pièce de déclenchement (30), en ce qu'une extrémité libre (31) de la pièce de déclenchement (30) coopère avec une pièce de butée (35) de la tringlerie (34), et en ce que le cliquet de commande (26) et la tringlerie (34) sont accouplés par un élément de liaison (32) flexible, le cliquet de commande (26), la tringlerie (34) et l'élément de liaison (32) étant en matière plastique et réalisés en une seule pièce.
  2. Outil manuel selon la revendication 1, caractérisé en ce que le cliquet de commande (26) est monté mobile en rotation dans un manche (12) de la poignée (7), et la tringlerie (34) est placée dans une nervure (10) en pouvant coulisser dans le sens longitudinal.
  3. Outil manuel selon la revendication 1 caractérisé en ce que la poignée (7) est réalisée comme un manche en double bêche avec une entretoise centrale (11) dans laquelle la tringlerie (34) est logée.
  4. Outil manuel selon l'une des revendications précédentes, caractérisé en ce que le cliquet de commande (26), la tringlerie (34) et l'élément de liaison (32) sont disposés dans le cadre (18) insérable dans la poignée (7).
  5. Outil manuel selon la revendication 4, caractérisé en ce que la poignée (7) est réalisée de manière massive et comprend une rainure (13) ouverte en direction de l'ouverture de prise (15, 16) et destinée à recevoir le cadre (18).
  6. Outil manuel selon la revendication 4, caractérisé en ce que le cliquet de commande (26) est muni de tenons ( 27, 28) qui s'enclenchent dans des perçages (21, 22) du cadre (18).
  7. Outil manuel selon l'une des revendications précédentes, caractérisé en ce que la poignée (7) est munie d'une enveloppe (14) souple de forme favorable pour la prise.
EP91102887A 1990-03-03 1991-02-28 Marteau actionné par électricité Expired - Lifetime EP0445636B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4006721A DE4006721A1 (de) 1990-03-03 1990-03-03 Elektrisch betriebener hammer
DE4006721 1990-03-03

Publications (2)

Publication Number Publication Date
EP0445636A1 EP0445636A1 (fr) 1991-09-11
EP0445636B1 true EP0445636B1 (fr) 1995-01-18

Family

ID=6401360

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91102887A Expired - Lifetime EP0445636B1 (fr) 1990-03-03 1991-02-28 Marteau actionné par électricité

Country Status (2)

Country Link
EP (1) EP0445636B1 (fr)
DE (2) DE4006721A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201015860Y (zh) * 2004-04-02 2008-02-06 布莱克和戴克公司 带有驱动器的动力工具

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB142922A (en) * 1919-02-12 1920-05-12 Alexander George Slade Improvements in or relating to percussive pneumatic hand tools
DE2839545A1 (de) * 1978-09-12 1980-03-20 Maco Meudon Sa Vorrichtung zum steuern der pressluftzufuhr eines schlagarbeitsgeraetes
IT7922984V0 (it) * 1979-10-29 1979-10-29 Star Utensili Elett Utensile elettrico portatile con comandi perfezionati.
DE3404962A1 (de) * 1984-02-11 1985-08-14 Robert Bosch Gmbh, 7000 Stuttgart Haltegriff fuer bohrmaschinen und/oder bohrhaemmer
DE3610682C2 (de) * 1986-03-29 1994-01-13 Bosch Gmbh Robert Griff für Handwerkzeugmaschinen
GB2230728B (en) * 1989-04-17 1992-10-21 Kioritz Corp Engine hammer

Also Published As

Publication number Publication date
EP0445636A1 (fr) 1991-09-11
DE4006721A1 (de) 1991-09-19
DE59104279D1 (de) 1995-03-02

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