EP2998073B1 - Machine-outil portative fonctionnant sur batterie ayant au moins une partie de carter moteur - Google Patents

Machine-outil portative fonctionnant sur batterie ayant au moins une partie de carter moteur Download PDF

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Publication number
EP2998073B1
EP2998073B1 EP15175103.9A EP15175103A EP2998073B1 EP 2998073 B1 EP2998073 B1 EP 2998073B1 EP 15175103 A EP15175103 A EP 15175103A EP 2998073 B1 EP2998073 B1 EP 2998073B1
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EP
European Patent Office
Prior art keywords
battery
machining tool
motor
grinder
housing part
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
EP15175103.9A
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German (de)
English (en)
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EP2998073A1 (fr
Inventor
Florian Esenwein
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 of EP2998073A1 publication Critical patent/EP2998073A1/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
    • 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 a battery-powered grinding device with at least one motor housing part.
  • WO 2013/084655 A1 discloses a conventional battery powered sander.
  • the grinding device according to the invention has the advantage of being very compact and handy.
  • the compact arrangement of the individual components in the battery-powered grinder, a handling of the battery-powered power tool results like a pen.
  • Advantage of the battery-powered grinder is the development of a new user group, especially women and people who previously had reservations and no experience with hand tools of this kind.
  • At least one rechargeable battery is provided as an energy source for the battery-powered hand tool machine, wherein the insertion direction of the rechargeable battery in Substantially coaxial with a main direction of extension x of the battery-operated hand tool machine runs.
  • a "main direction of extension x" of the battery-powered hand tool machine is to be understood here in particular as a geometric dimension in an x direction of the battery-powered hand tool machine.
  • At least one electromotive drive in particular an electronically commutated electric motor, is advantageously accommodated in at least one motor housing part, wherein the at least one electromotive drive drives at least one motor shaft and defines with the motor shaft at least one motor axis which lies coaxially with the motor shaft.
  • the battery-powered hand tool machine may comprise at least one machining tool holder carrying a machining tool, which is rotatably, oscillatingly, oscillatingly driven.
  • the motor housing part and the machining tool holder along the motor axis are arranged in alignment, that is, along the imaginary line of the motor axis.
  • a battery axis is defined by the rechargeable battery, wherein the battery axis penetrates the rechargeable battery in the direction of insertion of the rechargeable battery, especially coaxially with the motor axis. But it is also conceivable that the battery axis parallel, spaced from the motor axis. By this arrangement, the compactness of the battery-powered grinder is advantageously achieved.
  • the machining tool holder is driven by the electric motor drive gearless.
  • the wear of the battery-powered grinder is increased.
  • the motor housing part is designed as a handle.
  • a "handle” is to be understood here in particular as a component that can essentially be enclosed by a hand of an operator of the battery-operated grinding device in order to guide the battery-operated grinding device.
  • the motor housing part is substantially in total in the hands of an operator. This is achieved by the compact design of the battery-powered grinder.
  • the handle has a circumference U handle , which is between 80 and 170 mm, especially between 110 and 150 mm, but preferably 130 mm.
  • a circumference U handle which is between 80 and 170 mm, especially between 110 and 150 mm, but preferably 130 mm.
  • the compactness of the battery-operated grinder is advantageously shown in a length l, which has the battery-powered grinder.
  • the length l of the battery-powered grinder is between 100 and 215 mm, especially between 150 and 200mm.
  • the length I of the battery-powered grinder is 185 mm.
  • a large part of the rechargeable battery with a length 1 Batt is integrated in the motor housing part.
  • the compact design of the battery powered grinder is achieved by the powerful drive and use of the rechargeable battery.
  • the machining tool has a diameter d tool that is between 24 and 100 mm, especially between 32 and 77 mm, but preferably between 50 and 55 mm. In front of a grinder with such a small and compact machining tool lose even in dealing with Hand tooling inexperienced people shy away from handling the battery-powered grinder.
  • the motor housing part and the electric motor drive form a drive unit.
  • a “drive unit” is to be understood, in particular, as a component unit which accommodates the electromotive drive in the motor housing part.
  • module is to be understood here as a construction, in particular according to a modular principle. This means that the electronic unit can be assembled with a variety of different drive units for hand tool machines of different types. This modular design allows easy and cost-effective installation.
  • FIG. 1 is a designed as an eccentric grinder battery-powered power tool 10 with a rechargeable battery 12 as a source of energy shown in a schematic representation.
  • the rechargeable battery 12 is inserted or inserted into a motor housing part 14, wherein the rechargeable battery 12 is inserted with a large part of a battery length l Batt in the motor housing part 14.
  • the insertion direction of the rechargeable battery 12 extends substantially coaxially to a main extension direction x of the battery-operated hand tool 10.
  • the motor housing part 14 receives an electric motor drive 16.
  • the electromotive drive 16 is designed as an electronically commutated electric motor.
  • the electronically commutated electric motor 16 drives a motor shaft 18.
  • the electronically commutated electric motor 16 defines with the motor shaft 18 a motor shaft 20.
  • the motor shaft 20 is in this case coaxial with the motor shaft 18.
  • the motor shaft 18 is connected via an eccentrically arranged bearing with a support shaft 21 which carries a machining tool holder 22.
  • the machining tool holder 22 of the battery powered power tool 10 is in the exemplary embodiment a sanding pad, on the underside of a machining tool 25, such as an abrasive for surface treatment of a workpiece can be fastened.
  • the bearing can be designed as a ball bearing and allows a self-rotation of the support shaft 21 about an axis of rotation, which also represents the axis of rotation of the machining tool holder 22.
  • the axis of rotation of the support shaft is located at an eccentric distance parallel to the motor shaft 20 of the motor shaft 18th
  • the motor housing part 14 and the machining tool holder 22 are arranged in alignment along the motor axis 20.
  • the motor housing part 14 is connected to a tool housing part 23. Both housing parts 14, 23 are arranged in alignment along the motor axis 20. This arrangement allows handling of the battery-powered hand tool 10 similar to a pen, which allows people with a shy of the operation of the power tool easier access to handle with hand tools.
  • the rechargeable battery 12 is penetrated by a battery axis 24.
  • the battery axis 24 extends coaxially with the motor axis 20.
  • the battery axis 24 it is also possible for the battery axis 24 to extend at a distance from the motor axis 20, parallel to the motor axis 20.
  • the electronically commutated electric motor 16 drives the support shaft 21 gearless.
  • gearless is to be understood that the electronically commutated electric motor 16 is connected to the support shaft 21 without the interposition of a conventional transmission, such as a planetary gear, bevel gear or spur gear.
  • the eccentrically located machining tool holder 22 of the battery powered hand tool 10 performs a swinging rotary motion.
  • the resulting stroke is twice as large such as the eccentric distance between the axis of rotation of the support shaft 21 and the motor axis 18th
  • the motor housing part forms a handle 26.
  • the handle 26 is inventively designed such that the handle 26 almost in each hand, even in the very small persons, as in FIG. 2 shown, fits. Under “very small” should be understood here a body size of about 100 to 160cm, especially from about 130 to 140cm.
  • the handle 26 has a circumference U handle which is between 80 and 170 mm, in particular between 110 and 150, but is preferably 130 mm. With this scope, the battery powered hand tool 10 fits in every hand. These specifications take no account of possible manufacturing tolerances.
  • the battery-powered hand tool 10 has a total length l total , which is between 100 and 215 mm, especially between 150 and 200 mm, but is preferably 185 mm.
  • the rechargeable battery 12 is inserted with a majority of its length l Batt in the motor housing part 14.
  • l Batt the battery-operated power tool 10
  • the machining tool 25 has a diameter d tool which is between 24 and 100 mm, especially between 32 and 77 mm, but preferably between 50 and 55 mm. These specifications take no account of possible manufacturing tolerances.
  • a switching element 32 is attached to a rear side 34 of the battery powered hand tool 10.
  • the switching element 32 may be designed as a toggle switch, as a slide switch, as a button or the like. But it is also conceivable that the switch is designed as a dead man's switch or as a paddle switch in the handle area.
  • a lock can fix the switch in an on position.
  • an electronics 36 Upon actuation of the switching element 32, an electronics 36 is turned on.
  • the electronics 36 are arranged in the first motor housing part 14 in between the rechargeable battery 12 and an axially to the main extension direction x of the battery-powered power tool 10 extending housing wall.
  • the electronics 36 are provided to energize, control and / or regulate the electronically commutated electric motor 16.
  • a heat sink 38 dissipates thermal energy from the components of the electronics 36.
  • the cooling takes place actively, for example via a fan, Peltier elements or the like.
  • a follow-up cooling is conceivable.
  • a sensor element 40 is arranged adjacent to the electronics 36.
  • the sensor element 40 detects a physical quantity and converts the physical quantity into a sensor signal.
  • a processor 42 processes the sensor signals.
  • the electronically commutated electric motor 16 is designed in the embodiment as an internal rotor.
  • a stator carrying the live windings is attached to a motor housing.
  • a rotor carrying the permanent magnets is connected to the motor shaft 18.
  • the advantages of the internal rotor motor are a high speed to be achieved with high power density. But it is also conceivable that the electronically commutated electric motor 16 is designed as an external rotor motor.
  • the cooling plays an increasingly important role in hand tool machines with electronically commutated electric motors 16.
  • the cooling can be passive or active. In passive cooling, the removal of thermal energy by convection takes place. With active cooling, the thermal energy of the component to be cooled is removed by means of a cooling system.
  • a fan 50 is mounted on the motor shaft 18 and disposed between the electronically commutated electric motor 16 and the machining tool holder 22. But it is also conceivable that the fan 50 is not attached to the motor shaft 18, but via elements how belts or gears are connected to the motor shaft 18. It is equally conceivable that other cooling systems such as Peltier elements, heat sinks, additional actuators with air guide elements or the like are used.
  • the nominal battery voltage is preferably 3.6 V.
  • the values of the battery voltage do not take into account possible battery voltage fluctuations.
  • the charging voltage may be higher, while in operation of the battery powered hand tool 10, the voltage drops to less than 3.6V.
  • the rechargeable battery 12 consists in particular of lithium ion battery cells.
  • Lithium ion batteries are characterized by a high energy density and thermal stability even at high loads, which means high performance.
  • Another big advantage is the low self-discharge, which also means that the batteries are ready for use even with longer service lives. From these advantages, the advantages of the application according to the invention, in particular that the battery-powered portable power tool 10 on the one hand can be small and compact in size on the one hand and high performance on the other hand.
  • the rechargeable battery 12 consists of lithium-air cells, lithium-sulfur cells, lithium polymer cells or the like. Furthermore, the rechargeable battery 12 may be realized in a different geometric embodiment than shown, such as a square design.
  • the rechargeable battery 12 is in the embodiment in FIG. 1 designed as a replaceable rechargeable battery 12. But it is also conceivable that the rechargeable battery 12 is designed as an integrated unit.
  • a lighting device 55 arranged.
  • the lighting device 55 may also be arranged on the motor housing part 14.
  • the illumination device 55 can illuminate a working field, but also project optical information onto an environment.
  • the lighting device 55 may comprise both a single LED, as well as a plurality of LEDs.
  • the LEDs can be provided in various designs and sizes.
  • the lighting device 55 can also be designed as a point light source. But it is also conceivable that the lighting device 55 is designed as a projection device.
  • the lighting device 55 may have lighting elements which may be arranged in various shapes on the tool housing part 23 and / or on the motor housing part 14.
  • the speed is between 5,000rpm to 15,000rpm, especially between 6,000rpm and 12,000rpm.
  • the speed is 10,000rpm.
  • an operating mode such as an e-mode or a boost mode, can be set via an actuating element.
  • An “ecomodus” is to be understood in particular as a mode in which the electronically commutated electric motor is operated particularly efficiently.
  • efficiency is meant here that the electronically commutated electric motor is operated at the optimum operating point.
  • boost mode is to be understood as a mode in which the electronically commutated electric motor is operated particularly efficiently.
  • the power requirement on the electronically commutated electric motor can be limited in time and may be in the overload range of the electronically commutated electric motor.
  • the boost mode can be activated via a switch.
  • the power overshoot of the electronically commutated electric motor is between 10% and 100%, especially between 20% and 50%, but preferably at 33%.
  • the time limit of the boost mode is between 0 and 5min, especially between 0 and 2.5min.
  • the time limit of the boost mode is preferably between 30 s and 1 min.
  • a triggered by the eccentric movement of the machining tool holder 22 stroke of the machining tool holder 22 is optimally between 0.5 and 5mm, especially between 1 and 3mm, preferably between 1.25 and 2mm.
  • the battery-powered hand tool 10 has a communication module 58 for establishing a data transmission connection.
  • the communication module 58 transmits data representing an environment-specific characteristic and / or a tool-specific
  • the battery-powered hand tool 10 is equipped with an interface 60, which is intended to exchange data, in particular an electronic data exchange between the battery-powered power tool 10, in particular the electronics 36 of the battery-powered hand tool 10 and the external communication and / or data processing unit 62 to enable.
  • the data exchange between the electronics 36 and the external communication and / or data processing unit 62 is preferably wireless, for example with the aid of a Bluetooth connection, Bluetooth low energy, a WLAN connection, an NFC connection, an infrared connection or the like.
  • the electronics 36 controls and / or regulates the electronically commutated electric motor 16, preferably as a function of the parameters of the battery-powered handheld power tool 10.
  • the external communication and / or data processing unit 62 is preferably embodied as a smart interface, for example as a smartphone, which has an app for communication with the interface 60.
  • the external communication and / or data processing unit 62 it is also conceivable for the external communication and / or data processing unit 62 to be in the form of an external, transportable communication and / or data processing unit, permanently installed communication and / or data processing unit or as another central or decentralized communication module which appears appropriate to a person skilled in the art. and / or data processing unit is formed. It can thus be advantageous to enable synchronization of electronic data.
  • Settings stored in the external communication and / or data processing unit 62 can be transmitted, for example, directly to the battery-operated handheld power tool 10, such as a set speed, maximum power or the like.
  • a dust extraction device 64 attached to the tool housing part 23.
  • the machining tool 25 distributed over the circumference holes are introduced, on the resulting during processing of the workpiece grinding dust using a Staublformaters 67 and / or an external suction device is sucked into the first tool housing part 23, wherein the dust blower 67 is fixedly connected to an eccentric 66.
  • the eccentric element 66 is connected to the motor shaft 18. The transported through the holes of the machining tool 25 grinding dust is passed through the dust extraction device 64 in a dust collector, not shown.
  • FIG. 3 shows a drive unit 70.
  • the motor housing part 14 forms, together with the electric motor drive 16, the drive unit 70.
  • the drive unit 70 of FIG. 3 is designed as an eccentric sander attachment.
  • the parameters of the drive unit 70 include: rated power in W, rated current in A, rated voltage in V, rated speed in min -1 .
  • the drive unit 70 is defined by its parameters. The parameters mentioned are, among other things, on the nameplate.
  • machining tool unit and the drive unit 70 are separate component units that are assembled into a battery-powered hand tool machine 10 of a specific type.
  • component unit is to be understood here as a unit that assumes defined tasks in the operating state of the battery-operated handheld power tool 10.
  • Such component units may be an orbital sander, an orbital sander, a straight grinder, but also a drill, a jigsaw, an electric scraper, an oscillating multitool or the like.
  • FIG. 4 shows a constructed as an orbital sander battery-powered power tool 10.
  • the structure is substantially similar to the structure of the eccentric disc. It clearly shows the advantage of the modular design.
  • the structure of the drive unit 70 of the battery-operated hand tool according to FIG. 1 is identical to the structure of the drive unit 70 of the battery-powered power tool according to FIG. 4 , It is possible to exchange each of the tool units to realize different types of hand tooling machines.
  • the speed is between 5,000rpm to 14,000rpm, especially between 7,000rpm and 12,000rpm.
  • the speed is 10,000rpm.
  • the speed can be reduced via an actuator.
  • Embodiment 25a shows a nearly round shape of the machining tool 25.
  • the diameter d tool is between 24 and 100 mm, especially between 32 and 77 mm, but preferably between 50 and 55 mm. These specifications take no account of possible manufacturing tolerances.
  • Embodiment 25b shows a nearly triangular shape of the machining tool 25.
  • An edge length a tool is about 92 mm. Not considered are possible manufacturing tolerances.
  • Embodiment 25c shows a nearly quadrangular, in particular square shape of the machining tool 25.
  • An edge length b tool is approximately 50 mm.
  • Another edge length c tool is about 70mm. Not considered are possible manufacturing tolerances.

Claims (9)

  1. Ponceuse fonctionnant sur batterie (10), dotée d'une batterie rechargeable (12), prévue comme source d'énergie pour la ponceuse (10), dans laquelle la direction d'insertion de la batterie rechargeable (12) est essentiellement coaxiale à une direction d'étendue principale x de la ponceuse (10), d'une partie moteur du boîtier (14), accueillant un entraînement électromoteur (16), en particulier un moteur électrique (16) commuté électroniquement, dans laquelle l'entraînement électromoteur (16) entraîne un arbre moteur (18), dans laquelle l'entraînement électromoteur (16) définit avec l'arbre moteur (18) un axe moteur (20), coaxial à l'arbre moteur (18) et essentiellement coaxial à la direction d'étendue principale x, et d'un porte-outil d'usinage (22), dans laquelle la partie moteur du boîtier (14), la batterie (12) et le porte-outil d'usinage (22) sont agencés en alignement le long de l'axe moteur (20), dans laquelle le porte-outil d'usinage (22) est conçu comme disque abrasif sur la face inférieure duquel un outil d'usinage (25) peut être fixé, dans laquelle l'axe moteur (20) coupe le porte-outil d'usinage (22) et la batterie (12).
  2. Ponceuse fonctionnant sur batterie (10) selon la revendication 1, caractérisée en ce que la batterie rechargeable (12) définit un axe de batterie (24), dans laquelle l'axe de batterie (24) est coaxial à l'axe moteur (20) ou parallèle et à l'écart de l'axe moteur (20), au cas où la batterie rechargeable (12) est insérée dans la partie moteur du boîtier (14).
  3. Ponceuse fonctionnant sur batterie (10) selon l'une des revendications 1 ou 2, caractérisée en ce que l'arbre moteur (18) entraîne le porte-outil d'usinage (22) sans engrenage.
  4. Ponceuse fonctionnant sur batterie (10) selon l'une des revendications précédentes, caractérisée en ce que la partie moteur du boîtier (14) forme une poignée (26), laquelle est prévue pour être entourée par la main d'un utilisateur.
  5. Ponceuse fonctionnant sur batterie (10) selon la revendication 4, caractérisée en ce que la poignée (26) comporte une circonférence Upoignée comprise entre 80 et 170 mm, en particulier comprise entre 110 et 150, de préférence de 130 mm.
  6. Ponceuse fonctionnant sur batterie (10) selon l'une des revendications précédentes, caractérisée en ce que la ponceuse fonctionnant sur batterie (10) comporte une longueur l comprise entre 100 et 215 mm, en particulier comprise entre 150 et 150 mm, de préférence de 185 mm, dans laquelle la batterie rechargeable (12) est insérée dans la partie moteur du boîtier (14) avec une majeure partie d'une longueur IBatt de batterie rechargeable (12) .
  7. Ponceuse fonctionnant sur batterie (10) selon l'une des revendications précédentes, caractérisée en ce qu'un outil d'usinage (25) monté sur le porte-outil d'usinage (22) comporte un diamètre doutil compris entre 24 et 100 mm, en particulier entre 32 et 77 mm, de préférence compris entre 50 et 55 mm.
  8. Ponceuse fonctionnant sur batterie (10) selon l'une des revendications 1 à 7, caractérisée en ce qu'un outil d'usinage (25) monté sur le porte-outil d'usinage (22) comporte une longueur d'arête aoutil d'environ 92 mm.
  9. Ponceuse fonctionnant sur batterie (10) selon l'une des revendications 1 à 7, caractérisée en ce qu'un outil d'usinage (25) monté sur le porte-outil d'usinage (22) comporte une longueur d'arête boutil d'environ 50 mm et une longueur d'arête supplémentaire coutil d'environ 70 mm.
EP15175103.9A 2014-09-10 2015-07-02 Machine-outil portative fonctionnant sur batterie ayant au moins une partie de carter moteur Active EP2998073B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014218122.4A DE102014218122A1 (de) 2014-09-10 2014-09-10 Batteriebetriebene Handwerkzeugmaschine mit mindestens einem Motorgehäuseteil

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EP2998073A1 EP2998073A1 (fr) 2016-03-23
EP2998073B1 true EP2998073B1 (fr) 2018-09-19

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Cited By (1)

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US11837935B2 (en) 2021-02-02 2023-12-05 Black & Decker, Inc. Canned brushless motor

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EP4008490A1 (fr) * 2020-12-03 2022-06-08 Andreas Stihl AG & Co. KG Logement pour accueillir un module de communication

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EP2471632A1 (fr) * 2009-08-28 2012-07-04 Makita Corporation Outil électrique
WO2013084655A1 (fr) * 2011-12-06 2013-06-13 株式会社マキタ Outil électrique

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BR9406038A (pt) * 1993-04-05 1995-12-12 Black & Decker Inc Pacote de bateria para dispositivo sem fio de conexão
US6887244B1 (en) * 1998-12-16 2005-05-03 Medtronic, Inc. Cordless surgical handpiece with disposable battery; and method
US7557534B2 (en) * 2005-05-17 2009-07-07 Milwaukee Electric Tool Corporation Power tool, battery, charger and method of operating the same
JP4961418B2 (ja) * 2008-12-26 2012-06-27 オムロン株式会社 電動工具
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EP2471632A1 (fr) * 2009-08-28 2012-07-04 Makita Corporation Outil électrique
WO2013084655A1 (fr) * 2011-12-06 2013-06-13 株式会社マキタ Outil électrique

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11837935B2 (en) 2021-02-02 2023-12-05 Black & Decker, Inc. Canned brushless motor
US11855521B2 (en) 2021-02-02 2023-12-26 Black & Decker, Inc. Brushless DC motor for a body-grip power tool
US11870316B2 (en) 2021-02-02 2024-01-09 Black & Decker, Inc. Brushless motor including a nested bearing bridge
US11876424B2 (en) 2021-02-02 2024-01-16 Black & Decker Inc. Compact brushless motor including in-line terminals
US11955863B2 (en) 2021-02-02 2024-04-09 Black & Decker Inc. Circuit board assembly for compact brushless motor

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DE102014218122A1 (de) 2016-03-10

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