EP0421121A2 - Marteau actionnée électriquement - Google Patents

Marteau actionnée électriquement Download PDF

Info

Publication number
EP0421121A2
EP0421121A2 EP19900116558 EP90116558A EP0421121A2 EP 0421121 A2 EP0421121 A2 EP 0421121A2 EP 19900116558 EP19900116558 EP 19900116558 EP 90116558 A EP90116558 A EP 90116558A EP 0421121 A2 EP0421121 A2 EP 0421121A2
Authority
EP
European Patent Office
Prior art keywords
handle
hammer
hammer according
housing
switch
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
EP19900116558
Other languages
German (de)
English (en)
Other versions
EP0421121A3 (en
EP0421121B1 (fr
Inventor
Karl Dr.-Ing. Wanner
Karl Frauhammer
Frank Müller
Heinz Schnerring
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 EP0421121A2 publication Critical patent/EP0421121A2/fr
Publication of EP0421121A3 publication Critical patent/EP0421121A3/de
Application granted granted Critical
Publication of EP0421121B1 publication Critical patent/EP0421121B1/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
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • 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
    • 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
    • B25D2250/255—Switches
    • B25D2250/265—Trigger mechanism in handle

Definitions

  • the invention relates to an electrically operated hammer 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 of damaging the sensitive grip area and subsequently exposing live cables. This can pose a danger to the operator.
  • the hammer according to the invention with the characterizing features of claim 1 has the advantage that the assembly effort is significantly reduced, the electrical lines better protected and the handle can be optimally designed ergonomically without restrictions.
  • the handle for the on-off switch is arranged in a user-friendly position on the housing and is easy to use with your thumb and forefinger. Since it is not in the grip area of the hand, it does not interfere with the handling of the hammer during operation.
  • Figure 1 shows a hammer in partial section
  • Figure 2 shows a cross section along line II-II in Figure 1.
  • a percussion hammer 1 has a housing 2 in which a motor 3 and a percussion mechanism 4 (not shown in more detail) are accommodated.
  • a tool holder 5 with a longitudinal axis 6 is arranged in a manner known per se.
  • a chisel or striking tool, not shown, can be inserted and locked into the tool holder 5.
  • a handle 7 is attached to the housing 2, for example screwed on.
  • the handle 7 has a U-shaped shape, so that a passage opening 8 for the hand of the operator is formed between the housing 2 and the handle 7.
  • the handle 7 consists of a solid core 10 made of plastic or metal, which is bulged in the middle part for ergonomic reasons, and whose upper corner 11 and its lower corner 12 are rounded.
  • the core 10 is completely encapsulated with an elastomer foam 13, also at the corners 11, 12.
  • the elastomer foam 13 has a vibration-damping effect.
  • another elastic material can also be used to coat the core 10.
  • the ends 14 of the handle 7 widen increasingly towards the housing 2.
  • the bracket 15, which is connected to the core 10 of the handle 7 belongs to the housing 2 and closes this to the handle 7.
  • a plate-shaped handle 16 of an electrical switch 17 for switching on and off is mounted in the through opening 8 on the bracket 15.
  • the handle 16 is designed as a sliding element which is displaceable transversely to the longitudinal extension of the handle 7 and transversely to the axis 6 of the tool holder 5 by the switching path S and engages in its end positions (FIG. 2).
  • the handle 16 has in the direction of the longitudinal extent of the handle 7 on its edges two ribs 18, 19 which facilitate handling.
  • the handle 16 has lugs 20, 21 protruding at the top and bottom, which engage in elongated cutouts 22 in the bracket 15 and are transversely displaceable therein.
  • the handle 16 On its rear side facing away from the handle 7, the handle 16 has a fork 23 into which a switching roller 25 engages.
  • the switching roller rests on the one hand on the inside of the wall of the bracket 15 and on the other hand on a switching lever 26.
  • the shift lever 26 is pivotally supported at one end in a hinge 27; the other end rests on a switching pin 28 of the on-off switch 17 designed as a pressure switch.
  • the shift lever 26 has a portion 30 which runs obliquely to the direction of sliding of the handle 16 and against which the shift roller 25 rests.
  • the on-off switch 17, control electronics 31 and a power cord 32 are inserted into a protective frame 35 molded onto the housing 34 of the motor 3 and are held by the bracket 15 and preferably elastic retaining pins 33 attached thereto. All electrical and electronic components are combined to form a motor module 36, the protective frame 35 of which at the same time forms the outer housing of the hammer 1 in the region of the motor 3.
  • the handle 7 thus contains no live components such as wires, contacts or switches.
  • the protective frame 35 has two blinkers-like tabs 37 on the side of the built-in components; it can also be screwed to the housing of the motor 3 or connected in some other way.
  • the motor module 26 is mounted as a whole on the housing 2 and is covered at the bottom by a bearing cover 38 with ventilation slots.
  • the hammer can also be designed such that the motor module 36 is inserted into its housing 2. The torque of the motor 3 is transmitted to the hammer via a motor pinion 39.
  • the hammer 1 is equipped with a detection device known per se on the carbon brushes grinding on the collector of the motor 3. When the carbon brushes are used up, the detection device emits a signal to the control electronics 31. Thereby an indicator lamp 40 arranged on the control electronics 31 is switched on. In order to make this externally recognizable from the operating side of the hammer 1, a light guide 42 is inserted into a socket 41 of the bracket 15 and is visible through a lateral opening 43. This measure also prevents electrical components from being arranged within the handle 7.
  • the handle 16 In order to switch on the hammer 1, the handle 16 is shifted from the position shown in solid lines in FIG. 2 with the thumb into the position shown in broken lines. To do this, the thumb engages the outside of the rib 18. To switch off, the handle 16 is pushed back either with the index finger engaging the rib 19 or with the thumb engaging in the recess between the ribs 18 and 19.
  • the handle 16 has such a large height in the direction of the handle 7 that it extends approximately over half the length of the opening 8. This enables the switch to be actuated even when the operator's hand engages the lower part of the handle 7 in order to chisel in an oblique direction.
  • the invention is not limited to the exemplary embodiment shown.
  • the on-off switch can also be designed as a slide switch to which the displacement of the handle 16 is transmitted directly.
  • the motor module can also be used with a hammer drill or impact drill.
  • the switching pin 28 of the on-off switch 17 can optionally be connected to a handle acting as a push-button switch via a linkage.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP90116558A 1989-09-30 1990-08-29 Marteau actionnée électriquement Expired - Lifetime EP0421121B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3932814A DE3932814A1 (de) 1989-09-30 1989-09-30 Elektrisch betriebener hammer
DE3932814 1989-09-30

Publications (3)

Publication Number Publication Date
EP0421121A2 true EP0421121A2 (fr) 1991-04-10
EP0421121A3 EP0421121A3 (en) 1991-09-25
EP0421121B1 EP0421121B1 (fr) 1993-11-10

Family

ID=6390645

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90116558A Expired - Lifetime EP0421121B1 (fr) 1989-09-30 1990-08-29 Marteau actionnée électriquement

Country Status (2)

Country Link
EP (1) EP0421121B1 (fr)
DE (2) DE3932814A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010038750A1 (de) * 2010-08-02 2012-02-02 Robert Bosch Gmbh Elektrowerkzeugmaschine mit arretierbarer Schaltwippe

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10814468B2 (en) 2017-10-20 2020-10-27 Milwaukee Electric Tool Corporation Percussion tool
EP3743245B1 (fr) 2018-01-26 2024-04-10 Milwaukee Electric Tool Corporation Outil à percussion

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3456743A (en) * 1967-05-04 1969-07-22 Kango Electric Hammers Ltd Portable power tools
DE3404962A1 (de) * 1984-02-11 1985-08-14 Robert Bosch Gmbh, 7000 Stuttgart Haltegriff fuer bohrmaschinen und/oder bohrhaemmer
DE3610682A1 (de) * 1986-03-29 1987-10-01 Bosch Gmbh Robert Griff fuer handwerkzeugmaschinen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3456743A (en) * 1967-05-04 1969-07-22 Kango Electric Hammers Ltd Portable power tools
DE3404962A1 (de) * 1984-02-11 1985-08-14 Robert Bosch Gmbh, 7000 Stuttgart Haltegriff fuer bohrmaschinen und/oder bohrhaemmer
DE3610682A1 (de) * 1986-03-29 1987-10-01 Bosch Gmbh Robert Griff fuer handwerkzeugmaschinen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010038750A1 (de) * 2010-08-02 2012-02-02 Robert Bosch Gmbh Elektrowerkzeugmaschine mit arretierbarer Schaltwippe

Also Published As

Publication number Publication date
DE3932814A1 (de) 1991-04-11
EP0421121A3 (en) 1991-09-25
EP0421121B1 (fr) 1993-11-10
DE59003452D1 (de) 1993-12-16

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