EP2234776B1 - Outil électrique à main à alimentation par accumulateur - Google Patents

Outil électrique à main à alimentation par accumulateur Download PDF

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Publication number
EP2234776B1
EP2234776B1 EP08866883.5A EP08866883A EP2234776B1 EP 2234776 B1 EP2234776 B1 EP 2234776B1 EP 08866883 A EP08866883 A EP 08866883A EP 2234776 B1 EP2234776 B1 EP 2234776B1
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EP
European Patent Office
Prior art keywords
handle
rechargeable
battery cells
machine housing
battery
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.)
Active
Application number
EP08866883.5A
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German (de)
English (en)
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EP2234776A1 (fr
Inventor
Ulrich Bohne
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
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Robert Bosch GmbH
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Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2234776A1 publication Critical patent/EP2234776A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02—Construction of casings, bodies or handles

Definitions

  • the invention relates to an electric hand tool with an accumulator-based power supply according to the preamble of the independent claims.
  • the bow-shaped handle has a handle zone with actuator for the commissioning of the associated electric hand tool, wherein the bow-shaped handle is designed in its entirety as a component change for operation on different tool modules.
  • the tool modules themselves do not have their own handle, but are prepared for receiving the bow-shaped handle.
  • the bow-shaped handle includes a coupling and locking mechanism for coupling the bow-shaped handle to a tool module.
  • the bow-shaped handle further one or two battery cells of a battery-based power supply are added, which supply the tool module with electrical energy.
  • the accumulator-based power supply according to US 3,952,239 but is limited in its performance due to the limited number of battery cells.
  • the electric hand tool according to the invention with the features of claim 1 has the advantage that the accumulator-based power supply can be easily designed according to the power requirement of the electric hand tool.
  • a further advantage is to be considered that the arrangement of the accumulator cells in the handle and auxiliary handle favors the handling of the electric hand tool.
  • an equal or larger number of accumulator cells are accommodated in the handle than in the additional handle.
  • At least four accumulator cells are provided.
  • the electric hand tool according to the invention is particularly balanced in its handling.
  • a particularly favorable design of an electric hand tool according to the invention is achieved by a successive arrangement of the battery cells in a first orientation plane in the handle.
  • the accumulator cells in the auxiliary handle are also arranged one behind the other lying in a second alignment plane in the auxiliary handle.
  • the first alignment plane and the second alignment plane are aligned under at least one non-zero angle W1, in particular at right angles to each other.
  • the first alignment plane is aligned parallel to a machine axis.
  • the machine axis is defined by a direction of insertion of an insert tool into a tool holder.
  • the tool holder is preferably arranged at a front end of the machine housing.
  • the accumulator cells which are accommodated in the handle and / or additional handle, are combined by at least one holding element to form a cell group.
  • the holding element is used in particular for fixing the accumulator cells in the handle and / or additional handle.
  • the handle and the auxiliary handle are integrally formed on the machine housing.
  • an intermediate segment is provided, which connects the handle and the auxiliary handle at their ends facing away from the machine housing.
  • the bow-shaped double handle can also act like a guard.
  • the intermediate segment and the additional handle form a front bar leg. This front Stirrup leg protects a hand of an operator on the handle behind the guard, especially with one-handed use of the electric hand tool.
  • the machine housing is constructed of at least two, in particular predominantly along the machine axis symmetrically designed housing shells.
  • a particular performance of the electric hand tool according to the invention is achieved by the execution of the battery cells as Li-ion battery cells.
  • the electric hand tool comprises in its machine housing a charging unit for charging the battery cells.
  • the charging unit is designed so that the battery cells is enabled via a wireless power transmission.
  • a wireless energy transfer in particular an optical and / or inductive energy transfer come into question.
  • the machine housing has a charging socket.
  • the charging socket is connected to a charger via a suitable connecting cable and the charging process is started.
  • the electric hand tool has a signal unit in its machine housing.
  • the signal unit indicates a current charge level of the battery cells.
  • the battery cells are interchangeable added. This allows in particular a simple and cost-effective execution of maintenance work on the battery-based power supply.
  • This can be the Handle and / or additional handle suitable for replacement, closable openings.
  • the battery cells may be housed in cell cases prepared for replacement. In this case, the machine housing for receiving the cell housing suitable slots.
  • Fig. 1 is a partial section through a side views of a hammer drill 10 shown as an example of an electric hand tool according to the invention.
  • the hammer drill 10 has a machine housing 12. On the machine housing 12, a bow-shaped two-hand grip 14 is arranged. This bow-shaped two-hand grip 14 comprises a handle 16 and an auxiliary handle 18. The handle 16 and the auxiliary handle 18 are connected via an intermediate segment 20. The intermediate segment 20 is in each case arranged on the end 24, 26 of the handle 16 and of the auxiliary handle 18 which faces away from a main segment 22 of the machine housing 12.
  • the handle 16 and auxiliary handle 18 are integrally formed on the machine housing 12.
  • the machine housing 12 is also constructed in the present example, together with the handle 16, the auxiliary handle 18 and the intermediate segment 20 of two housing shells, as best in Fig. 4a and 4b you can see.
  • the hammer drill 10 further includes a tool holder 28 for receiving an insert tool, not shown here.
  • the insert tool is inserted in the direction of the arrow A into the tool holder 28, which thus defines a machine axis 29.
  • the tool holder 28 is arranged on a front end side 30 of the machine housing 12.
  • the handle 16 has an actuating element 34 on its end face 32 directed toward the tool holder 28.
  • the actuating element 34 serves to start up the hammer drill 10 according to the invention.
  • first inner space 36 formed by the handle 16 two battery cells 38 are accommodated.
  • the accumulator cells 38 are arranged one behind the other lying in a first alignment plane E1 in the present embodiment.
  • the alignment plane E1 lies in the plane of the drawing Fig. 1 .
  • an electronic unit 40 is disposed in the interior 36 of the handle 16, which cooperates with the actuating element 34 for commissioning of the hammer drill.
  • a second internal space 42 which is formed by the auxiliary handle 18, two battery cells 38 a are accommodated.
  • the two accumulator cells 38a are arranged one behind the other in a second alignment plane E2, wherein the alignment plane E2 perpendicular to the plane of the drawing Fig. 1 is oriented so that only one battery cell 38a in Fig. 1 is visible.
  • This is in Fig. 1 represented by the arrow symbol for E2.
  • the two alignment planes E1 and E2 thus enclose an angle W1 of 90 °, ie they are aligned at right angles to each other.
  • the arrangement of the accumulator cells becomes clearer 38, 38a in the Fig. 3b .
  • the accumulator cells 38, 38a arranged in the bow-shaped two-hand grip 14 are shown by dashed lines.
  • the accumulator cells 38, 38a lying spatially behind the battery cells 38a, 38 shown in dashed lines are shown as a dotted line.
  • the accumulator cells 38, 38a are combined in the handle 16 and the auxiliary handle 18 by a respective holding element 39, 39a to each cell group and fixed in their arrangement.
  • the holding elements 39, 39a are designed as holding straps. However, it is possible to use clip elements, shaped elements or clips as holding elements 39, 39a.
  • the accumulator cells 38, 38a together form the accumulator-based power supply of the Fig. 1 not shown drive unit.
  • the in Fig. 1 illustrated hammer 10 requires according to its power requirements for its operation minimally a battery-based power supply with at least four battery cells 38, 38a. However, more battery cells 38, 38a may be necessary for the longest possible service life.
  • the maximum meaningful number of battery cells 38, 38a is limited on the one hand by a maximum space available in the machine housing 12, in particular in the bow-shaped two-hand grip 14.
  • the weight of the electric hand tool also increases unfavorably with each additional battery cell 38, 38a.
  • four accumulator cells 38, 38a are therefore provided in the proposed hammer drill 10 as an example of a hand tool according to the invention.
  • the number of battery cells 38, 38a may vary.
  • a charging socket 44 is arranged below the battery cells 38a in the auxiliary handle 18.
  • the charging socket 44 can be connected to a battery charger, not shown, for charging the battery cells 38, 38a via a suitable, not shown here connecting cable.
  • the handle 16 is equipped in its surface with elastic grip zones 46, as best in Fig. 2 you can see.
  • the operator actuates the actuating element 34. If the actuating element 34 is actuated, the drive unit is connected via the electronic unit 40 to the battery-based power supply, so that the insert tool used in the tool holder 28 is driven.
  • the auxiliary handle 18 forms together with the intermediate segment 20 a guard for the one hand of the operator.
  • the auxiliary handle 18 is equipped with elastic grip zones 46a, as it is in Fig. 2 is shown.
  • the grip zones 46, 46a are made of an elastomer.
  • the grip zones 46, 46a are embedded in the machine housing 12, in particular in the handle 16 and / or the auxiliary handle 18 of the bow-shaped two-hand grip 14, and preferably firmly connected thereto.
  • Fig. 2 Advantageous developments of the hammer drill 10 according to the invention are in Fig. 2 shown.
  • the accumulator cells 38, 38a can be made interchangeable. This is particularly advantageous for maintenance work on the battery cells 38, 38a.
  • Fig. 2 For this purpose, two different variants for interchangeability are shown.
  • At least one, closable with a closure element 48 opening is provided through which the accumulator cells 38, not shown here, can be removed from the machine housing 12.
  • the closure element 48 fits positively in the mounted state into a surface of the handle 16.
  • a locking element 50 the closure member 48 is connected to the handle 16, so that the battery cells 38 are protected against removal and / or falling out.
  • a further variant for the interchangeability of the battery cells 38, 38 a is shown.
  • a receiving opening 52 is provided in the auxiliary handle 18.
  • a battery unit 54 is inserted and secured with a locking device 56 against removal and / or falling out.
  • the accumulator unit 54 comprises an accumulator housing 58, in which the accumulator cells 38a, not shown here, are accommodated.
  • the accumulator unit 54 is designed as a plug-in unit.
  • such standardized accumulator units 54 can be used in an electric hand tool according to the invention, as they are known in particular from telecommunications and / or from consumer electronics.
  • Fig. 3a shows a view of a hammer drill 10 after Fig. 1 from above.
  • a signal unit 60 is arranged, which indicates a state of charge of the accumulator-based power supply, in particular the accumulator cells 38, 38a.
  • the signal unit 60 may include an LED and / or LCD display unit and / or an acoustic signal generator.
  • Fig. 3b is the off Fig. 1 known hammer drill 10 according to the invention shown in a view from below.
  • the charging socket 44 for charging the battery cells 38, 38a can be seen.
  • the charging socket 44 is arranged in the present example in the end remote from the main segment 22 of the machine housing 12 end 26 of the front stirrup leg 18.
  • the charging socket 44 may also be arranged at other suitable locations in the machine housing 12.
  • Fig. 3b With dashed lines are in Fig. 3b the battery cells 38, 38a accommodated in the bow-shaped two-hand grip 14 are shown.
  • the electric hand tool comprises a charging unit 62, not shown here, accommodated in the machine housing 12.
  • This charging unit 62 is designed to charge the battery cells 38, 38a by means of a wireless energy transmission.
  • energy may be transferred from an inductive power source to the charging unit 62.
  • An optical energy transmission, in particular by photovoltaic means, is also a suitable solution.
  • Fig. 4a is the off Fig. 1 known hammer drill shown in a view from the front. Dashed lines in this illustration indicate the accumulator cells 38a in the auxiliary handle, which are arranged in the alignment plane E2. As a result, they appear in Fig. 4a lying next to each other.
  • the arranged in the handle 16 accumulator cells 38 are in Fig. 4a indicated as dotted lines, since they are spatially behind the battery cells 38a.
  • Their orientation plane E1 stands perpendicular to the plane of the drawing Fig. 4a ,
  • Fig. 4b shows that off Fig. 1 known hammer drill in a view from behind.
  • the battery cells 38 are dashed lines and the spatially underlying battery cells 38 a dotted.
  • FIG. 4a and 4b shown machine housing 12 of the hammer drill has a butt weld 64 which limits the two housing shells 66.
  • the housing shells 66 are designed predominantly symmetrically along the machine axis 29. In this way, the machine housing 12 can be inexpensively manufactured together with the bow-shaped two-hand grip 14 as an injection molded part.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)

Claims (12)

  1. Outil électroportatif, notamment marteau-perforateur et/ou -burineur, comprenant une alimentation en énergie à base d'accumulateur dotée d'au moins une cellule d'accumulateur (38, 38a) et un boîtier de machine (12), doté d'une poignée (16) et d'au moins une poignée supplémentaire (18), la poignée (16) et/ou la poignée supplémentaire (18) servant de logement pour ladite cellule d'accumulateur (38, 38a), plusieurs cellules d'accumulateur (38, 38a) étant logées dans la poignée (16) et la poignée supplémentaire (18), les cellules d'accumulateur (38, 38a) ne devant pas être retirées hors du boîtier de machine (12), notamment pas hors de la poignée (16) et de la poignée supplémentaire (18), caractérisé en ce que les cellules d'accumulateur (38) dans la poignée (16) sont disposées dans un premier plan d'orientation (E1) qui est orienté selon un angle W1 différent de zéro, lequel est notamment droit, par rapport à un deuxième plan d'orientation (E2) dans lequel sont disposées les cellules d'accumulateur (38a) dans la poignée supplémentaire (18), les cellules d'accumulateur (38, 38a) étant des cellules d'accumulateur lithium-ion.
  2. Outil électroportatif selon la revendication 1, caractérisé en ce que dans la poignée (16) est logé un nombre égal ou supérieur de cellules d'accumulateur (38) que dans la poignée supplémentaire (18).
  3. Outil électroportatif selon la revendication 1 ou 2, caractérisé en ce qu'au total sont prévues au moins trois cellules d'accumulateur (38, 38a).
  4. Outil électroportatif selon l'une des revendications 1 à 3, caractérisé en ce que le même nombre de cellules d'accumulateur (38, 38a) est à chaque fois logé dans la poignée (16) et dans la poignée supplémentaire (18).
  5. Outil électroportatif selon l'une des revendications précédentes, caractérisé en ce que les cellules d'accumulateur (38, 38a) dans la poignée (16) et/ou dans la poignée supplémentaire (18) sont regroupées par un élément de maintien (39, 39a) en un groupe de cellules.
  6. Outil électroportatif selon l'une des revendications précédentes, caractérisé en ce que la poignée (16) et la poignée supplémentaire (18) sont formées sur le boîtier de machine (12).
  7. Outil électroportatif selon l'une des revendications précédentes, caractérisé en ce qu'il existe un segment intermédiaire (20) qui relie la poignée (16) et la poignée supplémentaire (18) au niveau de leurs extrémités (24, 26) à l'opposé du boîtier de machine (12) et forme ainsi une poignée à deux mains (14) en forme d'anse.
  8. Outil électroportatif selon l'une des revendications précédentes, caractérisé en ce que le boîtier de machine (14) est constitué d'au moins deux coques de boîtier (66) de configuration symétrique, de préférence principalement le long de l'axe de la machine (29).
  9. Outil électroportatif selon l'une des revendications précédentes, caractérisé en ce que dans le boîtier de machine (12) se trouve un bloc chargeur (62) qui permet une charge des cellules d'accumulateur (38, 38a) par le biais d'une transmission d'énergie sans fil, notamment une transmission d'énergie optique et/ou inductive.
  10. Outil électroportatif selon l'une des revendications précédentes, caractérisé en ce que dans le boîtier de machine (12), notamment dans la poignée (16) ou la poignée supplémentaire (18), se trouve une prise de charge (44) servant à charger les cellules d'accumulateur (38, 38a).
  11. Outil électroportatif selon l'une des revendications précédentes, caractérisé en ce que sur le boîtier de machine (12) se trouve une unité de signal (60) qui indique un état de charge des cellules d'accumulateur (38, 38a).
  12. Outil électroportatif selon l'une des revendications précédentes, caractérisé en ce que les cellules d'accumulateur (38, 38a) sont logées de manière à pouvoir être remplacées.
EP08866883.5A 2008-01-02 2008-11-06 Outil électrique à main à alimentation par accumulateur Active EP2234776B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008003111A DE102008003111A1 (de) 2008-01-02 2008-01-02 Elektrohandwerkzeug mit einer Akkumulator-basierten Energieversorgung
PCT/EP2008/065074 WO2009083317A1 (fr) 2008-01-02 2008-11-06 Outil électrique à main à alimentation par accumulateur

Publications (2)

Publication Number Publication Date
EP2234776A1 EP2234776A1 (fr) 2010-10-06
EP2234776B1 true EP2234776B1 (fr) 2016-02-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP08866883.5A Active EP2234776B1 (fr) 2008-01-02 2008-11-06 Outil électrique à main à alimentation par accumulateur

Country Status (5)

Country Link
EP (1) EP2234776B1 (fr)
CN (1) CN101909825B (fr)
DE (1) DE102008003111A1 (fr)
RU (1) RU2501647C2 (fr)
WO (1) WO2009083317A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102069477B (zh) * 2009-11-19 2012-10-10 南京德朔实业有限公司 一种动力榔头
EP2364818B1 (fr) 2010-03-08 2017-08-16 HILTI Aktiengesellschaft Machine-outil manuelle
US8636081B2 (en) 2011-12-15 2014-01-28 Milwaukee Electric Tool Corporation Rotary hammer
CN102225543A (zh) * 2011-05-04 2011-10-26 上海中轩科技发展有限公司 一种充电式锂电电动工具
DE102013202027A1 (de) * 2013-02-07 2014-08-07 Robert Bosch Gmbh Tragbare Werkzeugmaschine
AU2016257438B2 (en) 2015-05-04 2019-03-07 Milwaukee Electric Tool Corporation Power tool and method for wireless communication
DE102016208128A1 (de) * 2015-12-04 2017-06-08 Robert Bosch Gmbh Elektrotechnisches Erzeugnis
EP3181305A1 (fr) * 2015-12-17 2017-06-21 HILTI Aktiengesellschaft Machine-outil i sur batterie
US10814468B2 (en) 2017-10-20 2020-10-27 Milwaukee Electric Tool Corporation Percussion tool
WO2019147919A1 (fr) 2018-01-26 2019-08-01 Milwaukee Electric Tool Corporation Outil à percussion

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2203277A1 (fr) * 2007-10-10 2010-07-07 Robert Bosch GmbH Machine-outil à main électrique combinée

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Publication number Priority date Publication date Assignee Title
US3952239A (en) 1974-08-23 1976-04-20 The Black And Decker Manufacturing Company Modular cordless tools
CH668029A5 (de) * 1984-02-08 1988-11-30 Bosch Gmbh Robert Elektropneumatischer bohr- und/oder schlaghammer mit batteriegespeistem antriebsmotor.
DE4208804A1 (de) * 1992-03-19 1993-09-23 Festo Kg Pistolenartig ausgebildetes elektowerkzeug
DE50114395D1 (de) 2001-11-19 2008-11-20 Hilti Ag Elektrohandwerkzeuggerät mit Griffausführung
RU31696U1 (ru) * 2003-02-11 2003-08-20 Коломиец Валерий Михайлович Автоматическое зарядное устройство аккумуляторных батарей с индикацией заряда
JP4416443B2 (ja) * 2003-06-26 2010-02-17 パナソニック株式会社 電池パックとその製造方法

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2203277A1 (fr) * 2007-10-10 2010-07-07 Robert Bosch GmbH Machine-outil à main électrique combinée

Also Published As

Publication number Publication date
EP2234776A1 (fr) 2010-10-06
RU2501647C2 (ru) 2013-12-20
RU2010132276A (ru) 2012-02-10
CN101909825A (zh) 2010-12-08
WO2009083317A1 (fr) 2009-07-09
CN101909825B (zh) 2015-08-26
DE102008003111A1 (de) 2009-07-09

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