EP2933063B1 - Machine-outil portative dotée d'un moteur électrique commuté électroniquement - Google Patents

Machine-outil portative dotée d'un moteur électrique commuté électroniquement Download PDF

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Publication number
EP2933063B1
EP2933063B1 EP14197088.9A EP14197088A EP2933063B1 EP 2933063 B1 EP2933063 B1 EP 2933063B1 EP 14197088 A EP14197088 A EP 14197088A EP 2933063 B1 EP2933063 B1 EP 2933063B1
Authority
EP
European Patent Office
Prior art keywords
power tool
housing part
tool
hand power
bearing
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
EP14197088.9A
Other languages
German (de)
English (en)
Other versions
EP2933063A1 (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
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 EP2933063A1 publication Critical patent/EP2933063A1/fr
Application granted granted Critical
Publication of EP2933063B1 publication Critical patent/EP2933063B1/fr
Active legal-status Critical Current
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/04—Portable grinding machines, e.g. hand-guided; Accessories therefor with oscillating grinding tools; Accessories therefor
    • 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
    • B25F5/001—Gearings, speed selectors, clutches or the like specially adapted for rotary tools
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B47/00—Drives or gearings; Equipment therefor
    • 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

Definitions

  • the invention relates to a hand tool with an electronically commutated electric motor.
  • the hand tool according to the invention with the features of the independent claim has the advantage over the prior art, to be particularly efficient, efficient and low maintenance. This is achieved by at least one acting on a motor shaft electromotive drive is designed as electronically commutated electric motor.
  • Electronically commutated electric motors are characterized by a high degree of efficiency in the absence of wear.
  • the electronically commutated electric motor is received by a first housing part.
  • the motor shaft and the first housing part define a first common axis.
  • a second housing part is provided to receive a rechargeable battery, wherein the rechargeable battery and the second housing part define a second common axis.
  • the first axis is at an angle a to the second axis, which is approximately 90 °.
  • An output shaft carries the tool.
  • the motor shaft and the output shaft are arranged parallel to each other. This makes a compact design possible.
  • the motor shaft and the output shaft can also be arranged at an angle to each other, which is between -30 and 30 °, especially between -10 and 10 °, but preferably between -3.0 and 3.0 °.
  • the electronically commutated electric motor has a diameter d 1 which is between 25 and 60 mm, especially between 32 and 55 mm, but preferably between 37 and 51 mm.
  • At least one coupling / connecting element is provided to transmit a rotational movement of the motor shaft in a pivoting movement of the output shaft.
  • the oscillating pendulum movement is in an angular range between 0.4 and 2.5 °, especially between 0.8 and 1.6 °, but preferably between 1 and 1.4 °.
  • Up to 30,000 oscillations are performed in one second, but especially 25,000 Pendulum movements in one second, but preferably up to 20,000 oscillations in one second.
  • the coupling / connecting element has at least one coupling member, which is designed as a closed coupling member. This ensures a particularly robust transmission of motion from the motor shaft to the output shaft.
  • At least a first bearing and a second bearing are provided to receive the motor shaft rotatably.
  • a third bearing and a fourth bearing are provided to rotatably receive the output shaft.
  • the invention proposes that a bearing element is provided to connect the first bearing and the third bearing in particular with each other and thus to ensure a high stability of the bearing system.
  • the bearing element is designed as a separate component relative to the first housing.
  • FIG. 1 a hand tool 10 is shown.
  • an electric motor drive 16 is arranged, which drives a motor shaft 18.
  • An output shaft 20 carries a not shown in detail oscillating tool to be driven.
  • the motor shaft 18 and the first housing part define a first common axis 19 coaxial with the motor shaft 18.
  • a second housing part connects to the first housing part 14. the first housing part 14 and the second housing part 23 may be embodied in one piece or as separate component units
  • the second housing part 23 serves a user of the power tool 10 as a handle or is designed as a handle.
  • the term "handle” is intended to mean a component around which at least partially a hand of an operator can be placed in order to guide the power tool 10.
  • the second housing part 23 is provided for insertion of a rechargeable battery 25. Together with the rechargeable battery, the second housing part 23 defines a second axis 27 coaxial with the direction of insertion of the rechargeable battery 25.
  • the electromotive drive 16 is designed as an electronically commutated electric motor 16.
  • Electric motors of this type can be designed as internal rotor motors or external rotor motors.
  • the electronically commutated electric motor 16 is an internal rotor motor.
  • the first axis 19 is at an angle a to the second axis 27, which is approximately 90 °.
  • the angle specification does not take into account possible tolerances in the angle specification.
  • the motor shaft 18 and the output shaft 20 are arranged parallel to each other. However, the motor shaft 18 and the output shaft 20 may also be arranged at an angle to each other, which is between -30 and 30 °, especially between -10 and 10 °, but preferably between -3.0 and 3.0 °.
  • the angle specification does not take into account possible tolerances in the angle specification.
  • the electronically commutated electric motor 16 has in the embodiment according to the invention a diameter d 1 which is between 25 and 60 mm, especially between 32 and 55 mm, but preferably between 37 and 51 mm.
  • the rotational movement of the motor shaft 18 is transmitted via a coupling / connecting element 22 to the output shaft 20.
  • the coupling / connecting element 22 is arranged between the motor shaft 18 and the output shaft 20. With the help of the coupling / connecting element 22, the rotating movement of the motor shaft 18 is transmitted in an oscillating pendulum movement of the output shaft 20.
  • the coupling / connecting element 22 has a connecting member 24 which is non-rotatably connected to the output shaft 20.
  • An eccentric 26 is rotatably connected to the motor shaft 18.
  • the eccentric element 26 may be integrally connected to the motor shaft 18.
  • the coupling / connecting element 22 also has a coupling member 28.
  • the coupling member 28 is in particular closed executed. Between the eccentric element 26 and the coupling member 28, a ball bearing 30 is arranged.
  • the coupling member 28 encloses at least partially the ball bearing 30. It is also conceivable that the coupling member 28 at least partially surrounds the eccentric element 26.
  • FIG. 2 shows the coupling / connecting element 22 in detail view.
  • the oscillating pendulum movement is in an angular range between 0.4 and 2.5 °, especially between 0.8 and 1.6 °, but preferably between 1 and 1.4 °. Up to 30,000 oscillations are performed in one second, but especially 25,000 oscillations in one second, but preferably up to 20,000 oscillations in one second.
  • the motor shaft 18 is rotatably received at its end facing the tool in a first bearing 32 and rotatably received on its side facing away from the tool in a second bearing 33.
  • the first bearing 32 is arranged on the tool-facing side adjacent to the coupling member 28.
  • the output shaft 20 is rotatably received on its end facing the tool in a third bearing 34 and rotatably received on its side facing away from the tool in a fourth bearing 35.
  • the second bearing is arranged on the tool-facing side adjacent to the connecting member 24.
  • the two bearings 32, 34 are connected to each other via a bearing plate 36.
  • the bearing plate 36 is designed as a separate component relative to the first housing part 14.
  • the bearing plate 36 is constructed of a metal or a composite material, whereby the strength can be increased.
  • the four bearings 32, 33, 34, 35 can be designed as a fixed or floating bearing.
  • a switching element 38 is provided to turn on the power tool 10.
  • the switching element 38 is designed in the embodiment as a slide switch.
  • an internal Switch 40 is actuated, which turns on an electronics 42.
  • the electronics 42 energized and / or regulates and / or controls the electronically commutated electric motor 16.
  • the switch 40 and the electronics 42 are received by the second housing part 23.
  • 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.
  • the cooling system is a fan 44.
  • the fan 44 is mounted on the motor shaft 18 and disposed between the electronically commutated electric motor 16 and the eccentric element 26. But it is also conceivable that the fan 44 is not attached to the motor shaft 18, but is connected via elements such as belts or gears 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 hand tool 10 is designed as a battery-operated hand tool 10.
  • the rechargeable battery 25 is at least partially disposed on the second housing part 23 of the power tool 10.
  • a major part of a battery length I B is integrated in the second housing part 23.
  • the insertion direction of the rechargeable battery 25 is in this case coaxial with the second axis 27th
  • the rechargeable battery 25 is connected to the second housing part 23 of the power tool 10.
  • a large part of a battery length I B outside of second housing part 23 is arranged.
  • a rechargeable battery 25 penetrating battery axis 29 of the rechargeable battery 25 is in this case at an angle, in particular at right angles to the second axis 27th
  • the battery voltage is in a range between 3.6 and 36 V, in particular between 7.2 and 18 V. However, the battery voltage is preferably 10.8 V. The values of the battery voltage do not take into account possible battery voltage fluctuations.
  • the rechargeable battery 25 consists in particular of lithium ion battery cells.
  • the rechargeable battery 25 includes one or more rows of battery cells, which in turn are connected in parallel with each other.
  • 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.
  • a battery voltage indicator is integrated in the handle area.
  • the battery voltage indicator may be configured to optically indicate a level of the battery voltage. This can be done with the help of colored LED, flashing LED, digital display elements, LCD and the like.
  • FIG. 4 shows the hand tool 10 according to the invention as a mains-powered power tool 10.
  • a not fully shown power cord 49 is attached on the second housing part 23 of the power tool 10.
  • the power cord serves as an energy source for the power tool 10.
  • FIG. 5 shows a further embodiment of the hand tool 10 according to the invention with mounted machining tool 46.
  • a lighting device 48 is arranged on a side facing the machining tool 46 side of the first housing part 14 frontally.
  • the illumination device 48 may illuminate a working field, but also project optical information onto the processing tool 46.
  • the lighting device 48 may comprise both a single LED, as well as a plurality of LEDs. However, the lighting device 48 can also be designed as a projection device.
  • An adjusting device 50 is arranged on a lower side 51 of the second housing part 23.
  • the actuator 50 is intended to provide a speed and / or an operating mode, such as a power-saving mode or a boost mode.
  • a receiving element 52 is also arranged on the lower side 51 of the second housing part 23.
  • the receiving element receives a tool 54, which is provided for a change of the machining tool 46.
  • FIG. 6 shows an embodiment of the hand tool 10 according to the invention with a pressure element 55, which is intended to allow a tool-free change of the machining tool 46.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Power Tools In General (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Claims (8)

  1. Machine-outil portative (10) comportant au moins un entraînement par moteur électrique (16) agissant sur au moins un arbre moteur (18), lequel entraînement est logé dans une première parte de boîtier (14) comportant au moins un arbre de sortie (20) destiné à entraîner en oscillation un outil, dans laquelle l'arbre moteur (18) et la première partie de boîtier (14) définissent un premier axe commun (19), et au moins une seconde partie de boîtier (23) qui est prévue pour recevoir une batterie rechargeable (25), dans laquelle la batterie rechargeable (25) et la seconde partie de boîtier (23) définissent un second axe commun (27),
    caractérisée en ce que l'arbre moteur (18) et l'arbre de sortie (20) sont disposés parallèlement l'un à l'autre et en ce que l'entraînement par moteur électrique (16) est réalisé sous la forme d'un moteur électrique commuté électroniquement (16).
  2. Machine-outil portative (10) selon la revendication 1, caractérisée en ce que le premier axe (19) forme un angle a par rapport au second axe (28), lequel angle est approximativement égal à 90°.
  3. Machine-outil portative (10) selon l'une quelconque des revendications 1 ou 2, caractérisée en ce que le moteur électrique commuté électroniquement (16) présente un diamètre d1 qui est compris entre 25 et 60 mm, en particulier, entre 30 et 55 mm, mais de préférence, entre 37 et 51 mm.
  4. Machine-outil portative (10) selon l'une quelconque des revendications précédentes, caractérisée en ce qu'il est prévu au moins un premier support (32) servant à supporter l'arbre moteur (18) de manière à ce qu'il puisse tourner autour du premier axe (19).
  5. Machine-outil portative (10) selon l'une quelconque des revendications précédentes, caractérisée en ce qu'il est prévu au moins un autre support (34) servant à supporter de manière rotative l'arbre de sortie (20).
  6. Machine-outil portative (10) selon l'une quelconque des revendications précédentes, caractérisée en ce qu'il est prévu au moins une plaque de support (36) destinée à relier, notamment l'un à l'autre, au moins le premier support (32) et un autre support (34).
  7. Machine-outil portative (10) selon l'une quelconque des revendications précédentes, caractérisée en ce que la plaque de support (36) est notamment réalisée sous la forme d'un composant séparé par rapport à la première partie de boîtier (14).
  8. Machine-outil portative (10) selon l'une quelconque des revendications précédentes, caractérisée en ce que la machine-outil portative (10) est réalisée sous la forme d'une machine-outil portative (10) alimentée par batterie.
EP14197088.9A 2014-02-06 2014-12-10 Machine-outil portative dotée d'un moteur électrique commuté électroniquement Active EP2933063B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014202218.5A DE102014202218A1 (de) 2014-02-06 2014-02-06 Handwerkzeugmaschine mit einem elektronisch kommutierten Elektromotor

Publications (2)

Publication Number Publication Date
EP2933063A1 EP2933063A1 (fr) 2015-10-21
EP2933063B1 true EP2933063B1 (fr) 2017-09-20

Family

ID=52023282

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Application Number Title Priority Date Filing Date
EP14197088.9A Active EP2933063B1 (fr) 2014-02-06 2014-12-10 Machine-outil portative dotée d'un moteur électrique commuté électroniquement

Country Status (4)

Country Link
US (2) US10226850B2 (fr)
EP (1) EP2933063B1 (fr)
CN (1) CN104827446B (fr)
DE (1) DE102014202218A1 (fr)

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Also Published As

Publication number Publication date
DE102014202218A1 (de) 2015-08-06
CN104827446B (zh) 2020-08-21
US20190176289A1 (en) 2019-06-13
CN104827446A (zh) 2015-08-12
US20150217422A1 (en) 2015-08-06
US11000934B2 (en) 2021-05-11
US10226850B2 (en) 2019-03-12
EP2933063A1 (fr) 2015-10-21

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