EP3689553B1 - Handheld machine tool with an electro-motor drive - Google Patents

Handheld machine tool with an electro-motor drive Download PDF

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Publication number
EP3689553B1
EP3689553B1 EP20159673.1A EP20159673A EP3689553B1 EP 3689553 B1 EP3689553 B1 EP 3689553B1 EP 20159673 A EP20159673 A EP 20159673A EP 3689553 B1 EP3689553 B1 EP 3689553B1
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EP
European Patent Office
Prior art keywords
power tool
portable power
housing part
tool
length
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
EP20159673.1A
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German (de)
French (fr)
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EP3689553A1 (en
Inventor
Johannes WOLPERDING
Joachim Schadow
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.)
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Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to PL20159673T priority Critical patent/PL3689553T3/en
Priority to EP21189051.2A priority patent/EP3936284A1/en
Publication of EP3689553A1 publication Critical patent/EP3689553A1/en
Application granted granted Critical
Publication of EP3689553B1 publication Critical patent/EP3689553B1/en
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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
    • 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
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B24B23/028—Angle 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
    • B25F5/008—Cooling means

Definitions

  • the invention relates to a hand machine tool according to claim 1.
  • a first housing of the hand power tool has a first housing part and a second housing part.
  • the first housing part and the second housing part are to be understood here in particular as being theoretical constructions that do not exist in practice. This means that the first housing part and the second housing part are not component units that can be assembled and / or disassembled. However, it is also conceivable that the first housing part and the second housing part are designed as separate component units.
  • an electric motor drive is received by the first housing part.
  • the second housing part is designed as a handle educated.
  • the term “handle” should be understood to mean a component around which at least one hand of an operator can be placed in order to guide the hand-held power tool 10.
  • the ratio of a length of the hand power tool to a height of the first housing part should be between 1.6 and 2.8, but preferably be 2.25. This makes it particularly easy to handle.
  • the height h should be understood here to mean the geometric dimensions of the first housing part in the y direction.
  • the length I of the handheld power tool is to be understood as the dimension of the handheld power tool in the x direction.
  • the length I includes an externally visible length I 1 of the rechargeable battery that extends on an upper edge of the handheld power tool.
  • a rechargeable battery is provided as an energy source for the handheld power tool.
  • An energy source is to be understood here as a component which provides the electrical energy for the electric motor drive.
  • the electromotive drive forms a first common axis with the first housing.
  • the first axis is advantageously coaxial with a motor axis.
  • the height h of the first housing is at least between 70 mm and 90 mm, but is preferably 80 mm.
  • the height h is defined here along the first axis.
  • At least one electronic system is provided for energizing the electromotive drive.
  • the electronics are advantageously at least partially accommodated in the second housing.
  • the rechargeable battery advantageously forms a second common axis with the second housing part, which axis penetrates the rechargeable battery.
  • the length I of the handheld power tool is between 150 mm and 200 mm, but is preferably 180 mm.
  • the length I is defined here along the second axis.
  • the length I of the handheld power tool includes a length I 1 of the rechargeable battery. Without the length I 1 of the rechargeable battery, the length I of the handheld power tool is preferably between 130 mm and 170 mm. However, the length I of the handheld power tool without the length I 1 of the rechargeable battery is particularly preferably 150 mm.
  • a particularly ergonomic handheld power tool is obtained when the ratio of the length I of the handheld power tool to a circumference U of the second housing part is between 0.8 and 1.8, in particular between 1.0 and 1.6, but preferably between 1.0 and 1, 3 lies.
  • the circumference U of the second housing part is advantageously between 110 and 200 mm, in particular between 125 and 185 mm, but preferably between 150 and 175 mm.
  • the hand-held power tool can therefore be used ergonomically in one-handed operation.
  • the electromotive drive advantageously works as a direct drive.
  • a "direct drive” should be understood to mean that the electronically commutated motor is connected to a tool spindle without the interposition of a gear.
  • the electromotive drive is advantageously an electronically commutated electric motor. It is particularly advantageous if the electronically commutated electric motor is an internal rotor motor. This enables high speeds and a high power density to be achieved.
  • the electronically commutated electric motor is an external rotor motor. If the electronically commutated electric motor is an external rotor motor, the electric motor drive is robust designed and can deliver high torques right from the start. Such a drive is therefore particularly suitable for applications in which high torques are required.
  • the rotational speed of the tool spindle is greater than 12 000 min -1.
  • At least one fan is arranged in the first housing.
  • the fan is particularly advantageously integrated between the electromotive drive and a receptacle for a machining tool. This ensures effective cooling.
  • the weight of the handheld power tool is preferably between 0.5 and 1.0 kg.
  • the weight of the handheld power tool is particularly preferably between 0.6 and 0.7 kg.
  • a machining tool for the hand machine tool has a diameter d which is between 60 and 100 mm, in particular between 70 and 90 mm, but preferably between 75 and 80 mm.
  • a ratio of the diameter d of the machining tool to the diameter d 1 of the electromotive drive is between 1.5 and 2.6, in particular between 1.8 and 2.4, but preferably between 1.9 and 2.1.
  • a cutting depth of the machining tool is advantageously between 20 and 25 mm, preferably between 15 and 20.
  • At least one lighting device is provided to illuminate a work area or the like.
  • the lighting device can also project optical information onto the machining tool and / or into the surroundings.
  • data relating to the handheld power tool can be transmitted easily and reliably to an operator of the handheld power tool.
  • FIG. 1 a handheld power tool 10 designed as an angle grinder is shown in a schematic representation.
  • a first housing 12 consists of a first housing half-shell 13 and a second housing half-shell 15. The dividing plane between the two housing half-shells lies in the image plane of an observer.
  • the first housing 12 also comprises a first housing part 14 and a second housing part 16.
  • the first housing part 14 and the second housing part 16 are separated by an imaginary dividing line 17.
  • the two housing parts 14, 16 are theoretically represented housing parts in order to illustrate the structure of the handheld power tool 10. However, they are not housing parts that can be assembled and / or disassembled.
  • the dividing line 17 runs vertically in the y direction (see Fig. Figure 1 ) and thereby crosses an axis of a sleeve-shaped section 19.
  • the axis of the sleeve-shaped section 19 lies in the viewing direction of the observer.
  • An electromotive drive 18 is arranged in the first housing part 14.
  • the electromotive drive 18 is preferably designed as an electronically commutated motor 20.
  • the electric motor drive 18 drives an in Figure 1 tool spindle 22, not shown in detail.
  • the second housing part 16 is designed as a handle 24.
  • the term “handle” should be understood to mean a component around which at least one hand of an operator can be placed in order to guide the hand-held power tool 10.
  • a rechargeable battery 26 serves as an energy source for the electric motor drive 18.
  • FIG 2 the handheld power tool 10 according to the invention is shown schematically in a partial view.
  • a geometric extension of the first housing part 14 is defined by its height h.
  • the height h is the geometric dimension of the first housing part 14 in the y-direction.
  • a geometric extension of the handheld power tool 10 is defined by a length l.
  • the length I is the geometric dimension of the handheld power tool 10 in the x direction.
  • the length I is defined here including an externally visible geometric dimension I 1 of the rechargeable battery 26.
  • the length I 1 of the rechargeable battery 26 extends here on an upper edge 21 of the handheld power tool 10.
  • the electromotive drive 18 forms a first common axis 28 with the first housing part 14.
  • the first common axis 28 is coaxial with a motor shaft 30 of the electromotive drive 18.
  • the motor shaft 30 continues in the tool spindle 22.
  • the height h of the first housing part lies along the first axis 28 at least between 70 mm and 100 mm.
  • the height h is preferably 80 mm. This information does not contain possible deviations which must be taken into account and which may be caused by manufacturing tolerances.
  • Electronics 32 are provided to energize the electromotive drive 18.
  • the electronics 32 are arranged in the second housing part.
  • the electronics 32 are provided to control and / or regulate the electromotive drive 18 of the handheld power tool 10 as a function of a parameter relating to the handheld power tool 10.
  • the rechargeable battery 26 forms a second common axis 34.
  • the second axis penetrates the rechargeable battery 26 and advantageously extends along the second housing part 16 in an axial direction of the second housing part 16 is defined along the second axis 34.
  • the two axes 28, 34 are at an angle ⁇ to one another which is between 60 ° and 120 °, in particular between 80 ° and 100 °, but is preferably approximately 90 °.
  • the angle specification does not take into account any manufacturing tolerances.
  • the length I of the handheld power tool 10 along the second axis 34 is at least between 150 mm and 200 mm.
  • the length I is preferably 180 mm.
  • the length I of the handheld power tool 10 includes a length I 1 of the rechargeable battery 26. This information does not take into account possible manufacturing tolerances. Without the length I 1 of the rechargeable battery 26, the length I of the craft tool 10 is between 130 mm and 170 mm, but is preferably 150 mm.
  • the ratio of the length I of the second housing part 16 to the circumference U of the second housing part 16 is optimally designed.
  • the optimal ratio of the length I of the second housing part 16 to the circumference U of the second housing part 16 should be at least between 0.8 and 1.8, in particular between 1.0 and 1.6, but preferably between 1.0 and 1.3 .
  • the circumference U of the second housing part 16 defines the grip circumference of the handle 24.
  • a particularly ergonomic configuration of the handheld power tool 10 is achieved by an optimal circumference U of the second housing part 16.
  • the grip circumference of the handle 24 is between 110 and 200 mm, in particular between 125 and 185 mm, but preferably between 150 and 175 mm. If the grip circumference of the handle 24 lies within this range of values, the handheld power tool 10 can be guided with one hand in any working position of an operator. This information does not take into account any deviations that may occur due to manufacturing tolerances.
  • the electronically commutated electric motor 20 drives the tool spindle 22 directly. “Directly” should be understood to mean that the electronically commutated electric motor 20 is connected to the tool spindle 22 without the interposition of a conventional gear.
  • the electronically commutated electric motor 20 is an internal rotor motor.
  • a stator 36 which carries the current-carrying windings 38, is located on a motor housing 40.
  • a rotor 42 which carries the permanent magnets 44, is connected to the motor shaft 30.
  • the advantages of the internal rotor motor are a high speed that can be achieved with a high power density.
  • FIG Figure 3 Another embodiment of the handheld power tool 10 is shown in FIG Figure 3 shown.
  • the electronically commutated electric motor 20 is an external rotor motor.
  • the stator 36 which carries the windings 38, is enclosed by the rotor 42.
  • the magnetic field is generated by permanent magnets 44 which are arranged in the rotor 42.
  • the rotor 42 is usually attached to the motor shaft 30, while the stator is arranged on a stator carrier. Possible advantages of these motors are the high torques that can be achieved.
  • the speed on the tool spindle is at least 12,000 min -1 .
  • the speed can be increased up to 20,000 min -1 .
  • the cooling can be passive or active. With passive cooling, the thermal energy is transported away by convection. With active cooling, the thermal energy of the component to be cooled is transported away with the help of a cooling system.
  • the cooling system is a fan 46.
  • the fan 46 is integrated in the first housing part 14. It is particularly advantageous if the fan 46 is integrated between the electromotive drive 18 and a receptacle for a machining tool 48.
  • other cooling systems such as Peltier elements, closed cooling circuits or the like are used.
  • the handheld power tool 10 is the comparatively low weight of the handheld power tool 10 compared to the weights of handheld power tools of this type.
  • the weight of the handheld power tool 10 is between 0.5 and 1.0 kg.
  • the weight of the handheld power tool 10 is preferably between 0.6 and 0.7 kg.
  • the weight includes a weight of the rechargeable battery 26 and a weight of the machining tool 48.
  • the machining tool 48 of the handheld power tool 10 is, for example, a grinding, cutting or roughing disk.
  • the machining tool 48 has a diameter d which is between 60 and 100 mm, but especially between 70 and 90 mm.
  • the diameter d is preferably des Machining tool between 75 and 80 mm. This information does not take into account any deviations that may occur due to manufacturing tolerances.
  • This compact design of the machining tool 48 enables high rotational speeds of the machining tool 48 to be achieved. If the speed on the tool spindle is 20,000 min -1 , for example, a machining tool 48 with a diameter d of 80 mm rotates at a speed of approx. 80 m / s.
  • Another measure of the compactness of the machining tool and the performance of the electric motor drive 18 is a ratio of the diameter d of the machining tool 48 to the diameter d 1 of the electric motor drive 18.
  • the ratio of the diameter d of the machining tool 48 to the diameter d 1 of the electric motor drive 18 between 1.5 and 2.6, but especially between 1.8 and 2.4.
  • the ratio of the diameter d of the machining tool 48 to the diameter d 1 of the electromotive drive 18 is preferably between 1.9 and 2.1. This information does not take into account any deviations that may occur due to manufacturing tolerances.
  • the design of the handheld power tool 10, the electric motor drive 18 and the machining tool 48 achieves a cutting depth of the machining tool 48 which is between 20 and 25 mm, but preferably between 15 and 20 mm.
  • a protective hood 49 covers a circumferential area of the machining tool 48 in the radial direction and a radially extending end area 50 of the handheld power tool 10 axially.
  • handheld power tool 10 is designed as a battery-operated handheld power tool 10. As in Figure 1 it can be seen that the rechargeable battery 26 is connected to a rear side 52.
  • the battery voltage is in a range between 3.6 and 36 V, especially between 7.2 and 14.4 V, but is preferably 10.8V.
  • the rechargeable battery 26 consists in particular of lithium ion battery cells.
  • the rechargeable battery 26 comprises one or more rows of battery cells, which in turn are connected in parallel to one another.
  • Each individual cell is approximately 65 mm long and approximately 18 mm in diameter.
  • a cell has a length of 65 to 70 mm and a diameter of 14 mm to approximately 20 mm.
  • Lithium ion batteries are characterized by a high energy density and thermal stability even under high loads, which means high performance. Another great advantage is the low self-discharge, which means that the batteries are ready for use even after long periods of inactivity.
  • the rechargeable battery 26 consists of lithium-air cells, lithium-sulfur cells, lithium-polymer cells or the like. Furthermore, the rechargeable battery 26 can be implemented in a different geometric design than the one shown, such as an angular design, for example.
  • a battery voltage indicator 54 is integrated in the second housing half-shell 15.
  • the battery voltage display 54 is provided to visually display the level of the battery voltage. This can be done with the help of colored LEDs, flashing LEDs, digital display elements, LCD and the like.
  • a sensor device can be arranged in the second housing part 16, which detects a damaged and / or incorrectly mounted machining tool and / or the jamming of the machining tool and / or the bursting of the machining tool 48 is detected during operation of the handheld power tool 10.
  • the blocking device can be designed as a slide, pin or lever.
  • the spindle can be locked positively and / or non-positively. It is conceivable that elements such as locking or friction disks are applied to the output shaft 30.
  • the blocking device can be designed as a separate component. However, it is also conceivable that the blocking device is integrated into an existing component or is combined with it. Such a component can be a switching element, an actuating element or the like.
  • the spindle can be locked automatically. But it is also conceivable that the spindle lock can be actuated manually.
  • the handheld power tool 10 can be operated both in an energy-saving mode and in a boost mode.
  • a lighting device 70 is arranged on the first housing part 14 of the handheld power tool 10.
  • the lighting device 70 can, however, also be arranged on the second housing part 16.
  • the lighting device 70 can illuminate a work area, but can also project optical information onto a workpiece and / or an environment.
  • the lighting device 70 can have both a single LED and a plurality of LEDs.
  • the LEDs can be provided in various designs and sizes.
  • the lighting device 70 can, however, also be designed as a point light source. However, it is also conceivable that the lighting device 70 is designed as a projection device.
  • the lighting device 70 can have lighting elements which can be arranged in various forms on the first housing part 14 and / or on the second housing part 16.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sawing (AREA)
  • Portable Power Tools In General (AREA)

Description

Die Erfindung betrifft eine Handwerkzeugmaschine nach Anspruch 1.The invention relates to a hand machine tool according to claim 1.

Stand der TechnikState of the art

Aus den WO2013084655 A1 , US2010/009608 A1 und US2011/081846 A1 ist eine Handwerkzeugmaschine nach dem Oberbegriff des Anspruchs 1 bekannt.From the WO2013084655 A1 , US2010 / 009608 A1 and US2011 / 081846 A1 a hand machine tool according to the preamble of claim 1 is known.

Offenbarung der ErfindungDisclosure of the invention

Die erfindungsgemäße Handwerkzeugmaschine mit den Merkmalen des unabhängigen Anspruchs 1 hat den Vorteil, besonders kompakt, leistungsfähig und zugleich ergonomisch gut handhabbar zu sein. Ein erstes Gehäuse der Handwerkzeugmaschine weist erfindungsgemäß ein erstes Gehäuseteil und ein zweites Gehäuseteil auf.The hand machine tool according to the invention with the features of independent claim 1 has the advantage of being particularly compact, powerful and at the same time ergonomically easy to handle. According to the invention, a first housing of the hand power tool has a first housing part and a second housing part.

Unter dem ersten Gehäuseteil und dem zweiten Gehäuseteil sollen hier insbesondere theoretische, in der Praxis nicht existierende Konstruktionen verstanden werden. Das heißt, dass das erste Gehäuseteil und das zweite Gehäuseteil keine Bauteileinheiten sind, die montier- und/oder demontierbar sind. Es ist aber auch denkbar, dass das erste Gehäuseteil und das zweite Gehäuseteil als separate Bauteileinheiten ausgeführt sind.The first housing part and the second housing part are to be understood here in particular as being theoretical constructions that do not exist in practice. This means that the first housing part and the second housing part are not component units that can be assembled and / or disassembled. However, it is also conceivable that the first housing part and the second housing part are designed as separate component units.

Erfindungsgemäß wird ein elektromotorischer Antrieb vom ersten Gehäuseteil aufgenommen. Das zweite Gehäuseteil ist als ein Handgriff ausgebildet. Unter dem Begriff "Handgriff" soll ein Bauteil verstanden werden, um das mindestens eine Hand eines Bedieners gelegt werden kann, um die Handwerkzeugmaschine 10 zu führen.According to the invention, an electric motor drive is received by the first housing part. The second housing part is designed as a handle educated. The term “handle” should be understood to mean a component around which at least one hand of an operator can be placed in order to guide the hand-held power tool 10.

Das Verhältnis einer Länge der Handwerkzeugmaschine zu einer Höhe des ersten Gehäuseteils sollte zwischen 1,6 und 2,8 liegen, bevorzugt aber 2,25 betragen. Dadurch wird eine besonders gute Handhabbarkeit erreicht.The ratio of a length of the hand power tool to a height of the first housing part should be between 1.6 and 2.8, but preferably be 2.25. This makes it particularly easy to handle.

Unter der Höhe h soll hier die geometrische Abmessung des ersten Gehäuseteils in y Richtung verstanden werden. Unter der Länge I der Handwerkzeugmaschine soll die Abmessung der Handwerkzeugmaschine in x Richtung verstanden werden. Die Länge I schließt eine äußerlich sichtbare, sich an einem oberen Rand der Handwerkzeugmaschine erstreckende Länge I1 der wiederaufladbaren Batterie ein.The height h should be understood here to mean the geometric dimensions of the first housing part in the y direction. The length I of the handheld power tool is to be understood as the dimension of the handheld power tool in the x direction. The length I includes an externally visible length I 1 of the rechargeable battery that extends on an upper edge of the handheld power tool.

Erfindungsgemäß ist eine wiederaufladbare Batterie als Energiequelle für die Handwerkzeugmaschine vorgesehen.According to the invention, a rechargeable battery is provided as an energy source for the handheld power tool.

Unter Energiequelle soll hier ein Bauteil verstanden werden, welches die elektrische Energie für den elektromotorischen Antrieb bereit stellt.An energy source is to be understood here as a component which provides the electrical energy for the electric motor drive.

Durch die in den Unteransprüchen angegebenen Merkmale sind vorteilhafte Weiterbildungen der Handwerkzeugmaschine nach dem Anspruch 1 möglich.The features specified in the subclaims allow advantageous developments of the handheld power tool according to claim 1.

Erfindungsgemäß bildet der elektromotorische Antrieb mit dem ersten Gehäuse eine erste gemeinsame Achse.According to the invention, the electromotive drive forms a first common axis with the first housing.

Vorteilhafterweise liegt die erste Achse koaxial zu einer Motorachse.The first axis is advantageously coaxial with a motor axis.

In einer vorteilhaften Ausführungsform liegt die Höhe h des ersten Gehäuses zumindest zwischen 70 mm und 90 mm, beträgt bevorzugt aber 80 mm. Die Höhe h ist hier entlang der ersten Achse definiert.In an advantageous embodiment, the height h of the first housing is at least between 70 mm and 90 mm, but is preferably 80 mm. The height h is defined here along the first axis.

Es wird vorgeschlagen, dass mindestens eine Elektronik zum Bestromen des elektromotorischen Antriebs vorgesehen ist. Vorteilhafterweise wird die Elektronik vom zweiten Gehäuse zumindest teilweise aufgenommen. Vorteilhafterweise bildet die wiederaufladbare Batterie mit dem zweiten Gehäuseteil eine zweite gemeinsame Achse, welche die wiederaufladbare Batterie durchdringt.It is proposed that at least one electronic system is provided for energizing the electromotive drive. The electronics are advantageously at least partially accommodated in the second housing. The rechargeable battery advantageously forms a second common axis with the second housing part, which axis penetrates the rechargeable battery.

In einer vorteilhaften Ausführungsform liegt die Länge I der Handwerkzeugmaschine zwischen 150 mm und 200 mm, beträgt aber bevorzugt 180 mm. Die Länge I ist hierbei entlang der zweiten Achse definiert. Die Länge I der Handwerkzeugmaschine schließt dabei eine Länge I1 der wiederaufladbaren Batterie mit ein. Ohne die Länge I1 der wiederaufladbaren Batterie liegt die Länge I der Handwerkzeugmaschine bevorzugt zwischen 130 mm und 170 mm. Besonders bevorzugt beträgt die Länge I der Handwerkzeugmaschine ohne die Länge I1 der wiederaufladbaren Batterie aber 150mm.In an advantageous embodiment, the length I of the handheld power tool is between 150 mm and 200 mm, but is preferably 180 mm. The length I is defined here along the second axis. The length I of the handheld power tool includes a length I 1 of the rechargeable battery. Without the length I 1 of the rechargeable battery, the length I of the handheld power tool is preferably between 130 mm and 170 mm. However, the length I of the handheld power tool without the length I 1 of the rechargeable battery is particularly preferably 150 mm.

Eine besonders ergonomische Handwerkzeugmaschine ergibt sich, wenn das Verhältnis der Länge I der Handwerkzeugmaschine zu einem Umfang U des zweiten Gehäuseteils zwischen 0,8 und 1,8, insbesondere zwischen 1,0 und 1,6, bevorzugt aber zwischen 1,0 und 1,3 liegt.A particularly ergonomic handheld power tool is obtained when the ratio of the length I of the handheld power tool to a circumference U of the second housing part is between 0.8 and 1.8, in particular between 1.0 and 1.6, but preferably between 1.0 and 1, 3 lies.

Vorteilhafterweise liegt der Umfang U des zweiten Gehäuseteils zwischen 110 und 200 mm, insbesondere zwischen 125 und 185 mm, bevorzugt aber zwischen 150 und 175 mm. Somit ist die Handwerkzeugmaschine ergonomisch gut im Einhandbetrieb zu nutzen.The circumference U of the second housing part is advantageously between 110 and 200 mm, in particular between 125 and 185 mm, but preferably between 150 and 175 mm. The hand-held power tool can therefore be used ergonomically in one-handed operation.

Vorteilhafterweise arbeitet der elektromotorische Antrieb als Direktantrieb. Unter einem "Direktantrieb" soll verstanden werden, dass der elektronisch kommutierte Motor mit einer Werkzeugspindel ohne Zwischenschaltung eines Getriebes verbunden ist.The electromotive drive advantageously works as a direct drive. A "direct drive" should be understood to mean that the electronically commutated motor is connected to a tool spindle without the interposition of a gear.

Vorteilhafterweise ist der elektromotorische Anstrieb ein elektronisch kommutierter Elektromotor. Besonders vorteilhaft ist es, wenn der elektronisch kommutierte Elektromotor ein Innenläufermotor ist. Dadurch sind hohe Drehzahlen und eine hohe Leistungsdichte erreichbar.The electromotive drive is advantageously an electronically commutated electric motor. It is particularly advantageous if the electronically commutated electric motor is an internal rotor motor. This enables high speeds and a high power density to be achieved.

In einer weiteren vorteilhaften Ausführungsform ist der elektronisch kommutierte Elektromotor ein Außenläufermotor. Ist der elektronisch kommutierte Elektromotor ein Außenläufermotor, ist der elektromotorische Antrieb robust ausgelegt und kann aus dem Stand heraus hohe Drehmomente liefern. Ein solcher Antrieb eignet sich demnach besonders für Anwendungen, bei denen hohe Drehmomente gefordert sind.In a further advantageous embodiment, the electronically commutated electric motor is an external rotor motor. If the electronically commutated electric motor is an external rotor motor, the electric motor drive is robust designed and can deliver high torques right from the start. Such a drive is therefore particularly suitable for applications in which high torques are required.

In einer bevorzugten Ausgestaltung der Handwerkzeugmaschine ist die Drehzahl an der Werkzeugspindel größer als 12 000 min-1.In a preferred embodiment of the power tool, the rotational speed of the tool spindle is greater than 12 000 min -1.

Es wird vorgeschlagen, dass mindestens ein Lüfter im ersten Gehäuse angeordnet ist. Besonders vorteilhaft ist der Lüfter zwischen dem elektromotorischen Antrieb und einer Aufnahme für ein Bearbeitungswerkzeug integriert. Somit ist eine effektive Kühlung gewährleistet.It is proposed that at least one fan is arranged in the first housing. The fan is particularly advantageously integrated between the electromotive drive and a receptacle for a machining tool. This ensures effective cooling.

Bevorzugt liegt ein Gewicht der Handwerkzeugmaschine zwischen 0,5 und 1,0 kg. Besonders bevorzugt liegt das Gewicht der Handwerkzeugmaschine zwischen 0,6 und 0,7 kg.The weight of the handheld power tool is preferably between 0.5 and 1.0 kg. The weight of the handheld power tool is particularly preferably between 0.6 and 0.7 kg.

In einer vorteilhaften Ausführungsform weist ein Bearbeitungswerkzeug für die Handwerkzeugmaschine einen Durchmesser d auf, der zwischen 60 und 100 mm, besonders zwischen 70 und 90 mm, bevorzugt aber zwischen 75 und 80 mm liegt.In an advantageous embodiment, a machining tool for the hand machine tool has a diameter d which is between 60 and 100 mm, in particular between 70 and 90 mm, but preferably between 75 and 80 mm.

Erfindungsgemäß liegt ein Verhältnis des Durchmessers d des Bearbeitungswerkzeugs zum Durchmesser d1 des elektromotorischen Antriebs zwischen 1,5 und 2,6, besonders zwischen 1,8 und 2,4, bevorzugt aber zwischen 1,9 und 2,1.According to the invention, a ratio of the diameter d of the machining tool to the diameter d 1 of the electromotive drive is between 1.5 and 2.6, in particular between 1.8 and 2.4, but preferably between 1.9 and 2.1.

Vorteilhafterweise liegt eine Schnitttiefe des Bearbeitungswerkzeugs zwischen 20 und 25 mm, bevorzugt zwischen 15 und 20.A cutting depth of the machining tool is advantageously between 20 and 25 mm, preferably between 15 and 20.

In einer vorteilhaften Ausführungsform ist mindestens eine Beleuchtungsvorrichtung dazu vorgesehen, ein Arbeitsfeld oder dergleichen auszuleuchten. Die Beleuchtungsvorrichtung kann auch eine optische Informationen auf das Bearbeitungswerkzeug und/oder in die Umgebung projezieren. Dadurch kann einem Bediener der Handwerkzeugmaschine einfach und zuverlässig die Handwerkzeugmaschine betreffende Daten übermittelt werden.In an advantageous embodiment, at least one lighting device is provided to illuminate a work area or the like. The lighting device can also project optical information onto the machining tool and / or into the surroundings. As a result, data relating to the handheld power tool can be transmitted easily and reliably to an operator of the handheld power tool.

Weitere Vorteile und zweckmäßige Ausführungen sind der Figurenbeschreibung und den Zeichnungen zu entnehmen.Further advantages and useful designs can be found in the description of the figures and the drawings.

Zeichnungendrawings

In den Zeichnungen sind Ausführungsbeispiele einer erfindungsgemäßen Handwerkzeugmaschine gezeigt.Exemplary embodiments of a handheld power tool according to the invention are shown in the drawings.

Es zeigen:

Figur 1
die erfindungsgemäße Handwerkzeugmaschine in schematischer Darstellung,
Figur 2
eine Teilansicht der erfindungsgemäßen Handwerkzeugmaschine in schematischer Darstellung.
Figur 3
eine zweite Ausführungsform der erfindungsgemäßen Handwerkzeugmaschine in schematischer Darstellung,
Figur 4
eine dritte Ausführungsform der erfindungsgemäßen Handwerkzeugmaschine in schematischer Darstellung.
Show it:
Figure 1
the hand machine tool according to the invention in a schematic representation,
Figure 2
a partial view of the hand power tool according to the invention in a schematic representation.
Figure 3
a second embodiment of the hand power tool according to the invention in a schematic representation,
Figure 4
a third embodiment of the hand power tool according to the invention in a schematic representation.

Beschreibungdescription

Für die in den unterschiedlichen Ausführungsbeispielen vorkommenden gleichen Bauteile werden dieselben Bezugszahlen verwendet.The same reference numbers are used for the same components occurring in the different exemplary embodiments.

In Figur 1 ist eine als Winkelschleifer ausgebildete Handwerkzeugmaschine 10 in schematischer Darstellung gezeigt. Ein erstes Gehäuse 12 besteht aus einer ersten Gehäusehalbschale 13 und einer zweiten Gehäusehalbschale 15. Die Trennebene zwischen beiden Gehäusehalbschalen liegt hierbei in der Bildebene eines Betrachters.In Figure 1 a handheld power tool 10 designed as an angle grinder is shown in a schematic representation. A first housing 12 consists of a first housing half-shell 13 and a second housing half-shell 15. The dividing plane between the two housing half-shells lies in the image plane of an observer.

Das erste Gehäuse 12 umfasst außerdem ein erstes Gehäuseteil 14 und ein zweites Gehäuseteil 16. Das erste Gehäuseteil 14 und das zweite Gehäuseteil 16 sind durch eine gedachte Trennlinie 17 getrennt. Die beiden Gehäuseteile 14, 16 sind theoretisch dargestellte Gehäuseteile, um den Aufbau der Handwerkzeugmaschine 10 zu veranschaulichen. Sie sind jedoch keine montier- und/oder demontierbaren Gehäuseteile. Die Trennlinie 17 verläuft senkrecht in y Richtung (s. Figur 1) und kreuzt dabei eine Achse eines hülsenförmigen Abschnitts 19. Die Achse des hülsenförmigen Abschnitts 19 liegt hier in der Blickrichtung des Betrachters.The first housing 12 also comprises a first housing part 14 and a second housing part 16. The first housing part 14 and the second housing part 16 are separated by an imaginary dividing line 17. The two housing parts 14, 16 are theoretically represented housing parts in order to illustrate the structure of the handheld power tool 10. However, they are not housing parts that can be assembled and / or disassembled. The dividing line 17 runs vertically in the y direction (see Fig. Figure 1 ) and thereby crosses an axis of a sleeve-shaped section 19. The axis of the sleeve-shaped section 19 lies in the viewing direction of the observer.

Im ersten Gehäuseteil 14 ist ein elektromotorischer Antrieb 18 angeordnet. Der elektromotorische Antrieb 18 ist bevorzugt als elektronisch kommutierter Motor 20 ausgeführt. Der elektromotorische Antrieb 18 treibt eine in Figur 1 nicht näher dargestellte Werkzeugspindel 22 an. Das zweite Gehäuseteil 16 ist als ein Handgriff 24 ausgebildet. Unter dem Begriff "Handgriff" soll ein Bauteil verstanden werden, um das mindestens eine Hand eines Bedieners gelegt werden kann, um die Handwerkzeugmaschine 10 zu führen. Eine wiederaufladbare Batterie 26 dient als Energiequelle für den elektromotorischen Antrieb 18.An electromotive drive 18 is arranged in the first housing part 14. The electromotive drive 18 is preferably designed as an electronically commutated motor 20. The electric motor drive 18 drives an in Figure 1 tool spindle 22, not shown in detail. The second housing part 16 is designed as a handle 24. The term “handle” should be understood to mean a component around which at least one hand of an operator can be placed in order to guide the hand-held power tool 10. A rechargeable battery 26 serves as an energy source for the electric motor drive 18.

In Figur 2 ist die erfindungsgemäße Handwerkzeugmaschine 10 in Teilansicht schematisch dargestellt.In Figure 2 the handheld power tool 10 according to the invention is shown schematically in a partial view.

Wie in Figur 2 ersichtlich, wird eine geometrische Erstreckung des ersten Gehäuseteils 14 durch seine Höhe h definiert. Die Höhe h ist hierbei die geometrische Abmessung des ersten Gehäuseteils 14 in y-Richtung.As in Figure 2 can be seen, a geometric extension of the first housing part 14 is defined by its height h. The height h is the geometric dimension of the first housing part 14 in the y-direction.

Eine geometrische Erstreckung der Handwerkzeugmaschine 10 wird durch eine Länge I definiert. Die Länge I ist hierbei die geometrische Abmessung der Handwerkzeugmaschine 10 in x Richtung. Die Länge I ist hier einschließlich einer äußerlich sichtbaren geometrischen Abmessung I1 der wiederaufladbaren Batterie 26 definiert. Die Länge I1 der wiederaufladbaren Batterie 26 erstreckt sich hierbei an einem oberen Rand 21 der Handwerkzeugmaschine 10.A geometric extension of the handheld power tool 10 is defined by a length l. The length I is the geometric dimension of the handheld power tool 10 in the x direction. The length I is defined here including an externally visible geometric dimension I 1 of the rechargeable battery 26. The length I 1 of the rechargeable battery 26 extends here on an upper edge 21 of the handheld power tool 10.

Wie in Figur 2 ersichtlich gibt es ein optimales Verhältnis der Länge I d der Handwerkzeugmaschine 10 zur Höhe h des ersten Gehäuseteils 14. Optimaler weise liegt das Verhältnis der Länge I der Handwerkzeugmaschine 10 zur Höhe h des ersten Gehäuseteils 14 zwischen 1,5 und 2,8. Bevorzugt beträgt das Verhältnis der Länge I der Handwerkzeugmaschine 10 zur Höhe h des ersten Gehäuseteils 14 2,25. Diese Angaben berücksichtigen keine Abweichungen, die durch Fertigungstoleranzen auftreten können.As in Figure 2 It can be seen that there is an optimal ratio of the length I d of the handheld power tool 10 to the height h of the first housing part 14. The ratio of the length I of the handheld power tool 10 to the height h of the first housing part 14 is optimally between 1.5 and 2.8. The ratio of the length I of the handheld power tool 10 to the height h of the first housing part 14 is preferably 2.25. This information does not take into account any deviations that may occur due to manufacturing tolerances.

Der elektromotorische Antrieb 18 bildet mit dem ersten Gehäuseteil 14 eine erste gemeinsame Achse 28. Die erste gemeinsame Achse 28 liegt koaxial zu einer Motorwelle 30 des eletromotorischen Antriebs 18. Die Motorwelle 30 setzt sich im Ausführungsbeispiel in der Werkzeugspindel 22 fort.The electromotive drive 18 forms a first common axis 28 with the first housing part 14. The first common axis 28 is coaxial with a motor shaft 30 of the electromotive drive 18. In the exemplary embodiment, the motor shaft 30 continues in the tool spindle 22.

Die Höhe h des ersten Gehäuseteils liegt entlang der ersten Achse 28 mindestens zwischen 70 mm und 100 mm. Bevorzugt beträgt die Höhe h 80 mm. Diese Angaben beinhalten nicht mögliche, jedoch zu berücksichtigende Abweichungen, die durch Fertigungstoleranzen bedingt sein können.The height h of the first housing part lies along the first axis 28 at least between 70 mm and 100 mm. The height h is preferably 80 mm. This information does not contain possible deviations which must be taken into account and which may be caused by manufacturing tolerances.

Eine Elektronik 32 ist dazu vorgesehen, den elektromotorischen Antrieb 18 zu bestromen. Im Ausführungsbeispiel ist die Elektronik 32 im zweiten Gehäuseteil angeordnet. Es ist aber auch denkbar, die Elektronik 32 beispielsweise in den elektromotorischen Antrieb 18 zu integrieren oder separat auszuführen. Weiterhin ist die Elektronik dazu vorgesehen, den elektromotorischen Antrieb 18 der Handwerkzeugmaschine 10 in Abhängigkeit eines die Handwerkzeugmaschine 10 betreffenden Parameters zu steuern und/oder zu regeln.Electronics 32 are provided to energize the electromotive drive 18. In the exemplary embodiment, the electronics 32 are arranged in the second housing part. However, it is also conceivable to integrate the electronics 32 into the electromotive drive 18, for example, or to design it separately. Furthermore, the electronics are provided to control and / or regulate the electromotive drive 18 of the handheld power tool 10 as a function of a parameter relating to the handheld power tool 10.

Zusammen mit dem zweiten Gehäuseteil 16 bildet die wiederaufladbare Batterie 26 eine zweite gemeinsame Achse 34. Die zweite Achse durchdringt dabei die wiederaufladbare Batterie 26 und erstreckt sich vorteilhafterweise entlang des zweiten Gehäuseteils 16 in einer axialen Richtung des zweiten Gehäuseteils 16. Die Länge I der Handwerkzeugmaschine 10 ist entlang der zweiten Achse 34 definiert.Together with the second housing part 16, the rechargeable battery 26 forms a second common axis 34. The second axis penetrates the rechargeable battery 26 and advantageously extends along the second housing part 16 in an axial direction of the second housing part 16 is defined along the second axis 34.

Die beiden Achsen 28, 34 stehen in einem Winkel a zueinander, der zwischen 60° und 120°, besonders zwischen 80° und 100 ° liegt, bevorzugt aber ungefähr 90° beträgt. Die Winkelangabe berücksichtigt keine Fertigungstoleranzen.The two axes 28, 34 are at an angle α to one another which is between 60 ° and 120 °, in particular between 80 ° and 100 °, but is preferably approximately 90 °. The angle specification does not take into account any manufacturing tolerances.

Die Länge I der Handwerkzeugmaschine 10 entlang der zweiten Achse 34 liegt mindestens zwischen 150 mm und 200 mm. Bevorzugt beträgt die Länge I 180 mm. Die Länge I der Handwerkzeugmaschine 10 schließt eine Länge I1 der wiederaufladbaren Batterie 26 mit ein. Diese Angabe lässt mögliche Fertigungstoleranzen unberücksichtigt. Ohne die Länge I1 der wiederaufladbaren Batterie 26 liegt die Länge I der Handwerkzuegmaschine 10 zwischen 130 mm und 170 mm, beträgt bevorzugt aber 150mm.The length I of the handheld power tool 10 along the second axis 34 is at least between 150 mm and 200 mm. The length I is preferably 180 mm. The length I of the handheld power tool 10 includes a length I 1 of the rechargeable battery 26. This information does not take into account possible manufacturing tolerances. Without the length I 1 of the rechargeable battery 26, the length I of the craft tool 10 is between 130 mm and 170 mm, but is preferably 150 mm.

Eine weitere ergonomisch gute Auslegung der Handwerkzeugmaschine 10 wird dadurch erreicht, dass das Verhältnis der Länge I des zweiten Gehäuseteils 16 zum Umfang U des zweiten Gehäuseteils 16 optimal ausgelegt ist. Das optimale Verhältnis der Länge I des zweiten Gehäuseteils 16 zum Umfang U des zweiten Gehäuseteils 16 sollte zumindest zwischen 0,8 und 1,8, besondere zwischen 1,0 und 1,6 liegt, bevorzugt aber zwischen 1,0 und 1,3 liegen. Der Umfang U des zweiten Gehäuseteils 16 definiert hierbei den Griffumfang des Handgriffs 24. Diese Angaben berücksichtigen keine Abweichungen, die durch Fertigungstoleranzen auftreten können.Another ergonomically good design of the handheld power tool 10 is achieved in that the ratio of the length I of the second housing part 16 to the circumference U of the second housing part 16 is optimally designed. The optimal ratio of the length I of the second housing part 16 to the circumference U of the second housing part 16 should be at least between 0.8 and 1.8, in particular between 1.0 and 1.6, but preferably between 1.0 and 1.3 . The circumference U of the second housing part 16 defines the grip circumference of the handle 24. These details do not take into account any deviations that can occur due to manufacturing tolerances.

Eine besonders ergonomische Ausgestaltung der Handwerkzeugmaschine 10 wird durch einen optimalen Umfang U des zweiten Gehäuseteils 16 erreicht. In der erfindungsgemäßen Ausführung liegt der Griffumfang des Handgriffs 24 zwischen 110 bis 200 mm, besonders zwischen 125 bis 185 mm, bevorzugt aber zwischen 150 und 175 mm. Liegt der Griffumfang des Handgriffs 24 innerhalb dieses Wertebereichs kann die Handwerkzeugmaschine 10 in jeder Arbeitsposition eines Bedieners mit einer Hand geführt werden. Diese Angaben berücksichtigen keine Abweichungen, die durch Fertigungstoleranzen auftreten können.A particularly ergonomic configuration of the handheld power tool 10 is achieved by an optimal circumference U of the second housing part 16. In the embodiment according to the invention, the grip circumference of the handle 24 is between 110 and 200 mm, in particular between 125 and 185 mm, but preferably between 150 and 175 mm. If the grip circumference of the handle 24 lies within this range of values, the handheld power tool 10 can be guided with one hand in any working position of an operator. This information does not take into account any deviations that may occur due to manufacturing tolerances.

Der elektronisch kommutierte Elektromotor 20 treibt die Werkzeugspindel 22 direkt an. Unter "direkt" soll verstanden werden, dass der elektronisch kommutierte Elektromotor 20 mit der Werkzeugspindel 22 ohne Zwischenschaltung eines konventionellen Getriebes verbunden ist.The electronically commutated electric motor 20 drives the tool spindle 22 directly. “Directly” should be understood to mean that the electronically commutated electric motor 20 is connected to the tool spindle 22 without the interposition of a conventional gear.

Wie in Figur 2 ersichtlich, ist der elektronisch kommutierte Elektromotor 20 ein Innenläufermotor. Bei Motoren dieser Art befindet sich ein Stator 36, der die stromführenden Wicklungen 38 trägt, an einem Motorgehäuse 40. Ein Rotor 42, der die Permanentmagnete 44 trägt, ist mit der Motorwelle 30 verbunden. Die Vorteile des Innenläufermotors sind eine hohe zu erreichende Drehzahl bei hoher Leistungsdichte.As in Figure 2 As can be seen, the electronically commutated electric motor 20 is an internal rotor motor. In motors of this type, a stator 36, which carries the current-carrying windings 38, is located on a motor housing 40. A rotor 42, which carries the permanent magnets 44, is connected to the motor shaft 30. The advantages of the internal rotor motor are a high speed that can be achieved with a high power density.

Eine weitere Ausführungsform der Handwerkzeugmaschine 10 ist in Figur 3 dargestellt. Wie in Figur 3 ersichtlich, ist der elektronisch kommutierte Elektromotor 20 ein Außenläufermotor. Bei Motoren dieser Art wird der Stator 36, der die Wicklungen 38 trägt vom Rotor 42 umschlossen. Das Magnetfeld wird durch Permanentmagnete 44 erzeugt, die im Rotor 42 angeordnet sind. Der Rotor 42 ist üblicherweise an der Motorwelle 30 befestigt, während der Stator auf einem Statorträger angeordnet ist. Mögliche Vorteile dieser Motoren sind die zu erreichenden hohen Drehmomente.Another embodiment of the handheld power tool 10 is shown in FIG Figure 3 shown. As in Figure 3 As can be seen, the electronically commutated electric motor 20 is an external rotor motor. In motors of this type, the stator 36, which carries the windings 38, is enclosed by the rotor 42. The magnetic field is generated by permanent magnets 44 which are arranged in the rotor 42. The rotor 42 is usually attached to the motor shaft 30, while the stator is arranged on a stator carrier. Possible advantages of these motors are the high torques that can be achieved.

Im Ausführungsbeispiel beträgt die Drehzahl an der Werkzeugspindel mindestens 12 000 min-1. Die Drehzahl kann bis 20 000 min-1 erhöht werden.In the exemplary embodiment, the speed on the tool spindle is at least 12,000 min -1 . The speed can be increased up to 20,000 min -1 .

Da bei Handwerkzeugmaschinen 10 mit elektronisch kommutierten Elektromotoren 20 die Elektronik 32 leistungsfähiger und von Größe und Volumen größer ausgelegt ist als bei Bürstenmotoren, spielt die Kühlung eine immer wichtigere Rolle und hat die Notwendigkeit einer optimalen Kühlung zur Folge. Die Kühlung kann passiv oder aktiv ausgeführt sein. Bei der passiven Kühlung erfolgt der Abtransport der thermischen Energie durch Konvektion. Bei aktiver Kühlung wird die thermische Energie der zu kühlenden Komponente mit Hilfe eines Kühlsystems abtransportiert.Since the electronics 32 in handheld power tools 10 with electronically commutated electric motors 20 are more powerful and larger in size and volume than in brush motors, cooling is playing an increasingly important role and necessitates optimal cooling. The cooling can be passive or active. With passive cooling, the thermal energy is transported away by convection. With active cooling, the thermal energy of the component to be cooled is transported away with the help of a cooling system.

Im Ausführungsbeispiel ist das Kühlsystem ein Lüfter 46. Der Lüfter 46 ist im ersten Gehäuseteil 14 integriert. Besonders vorteilhaft ist es, wenn der Lüfter 46 zwischen dem elektromotorischen Antrieb 18 und einer Aufnahme für ein Bearbeitungswerkzeug 48 integriert ist. Es ist aber auch denkbar, dass andere Kühlsysteme wie Peltierelemente, geschlossene Kühlkreisläufe oder dergleichen zum Einsatz kommen.In the exemplary embodiment, the cooling system is a fan 46. The fan 46 is integrated in the first housing part 14. It is particularly advantageous if the fan 46 is integrated between the electromotive drive 18 and a receptacle for a machining tool 48. However, it is also conceivable that other cooling systems such as Peltier elements, closed cooling circuits or the like are used.

Genauso gut ist es denkbar, auf den Lüfter zu verzichten und die Kühlung zum Beispiel über intelligent angeordnete Kühlrippen und/oder Kühlkörper zu realisieren.It is just as well conceivable to dispense with the fan and to implement the cooling, for example, via intelligently arranged cooling fins and / or heat sinks.

Ein weiterer Vorteil der Handwerkzeugmaschine 10 ist das vergleichsweise geringe Gewicht der Handwerkzeugmaschine 10 gegenüber den Gewichten von Handwerkzeugmaschinen dieser Art. Das Gewicht der Handwerkzeugmaschine 10 liegt zwischen 0,5 und 1,0 kg. Bevorzugt liegt das Gewicht der Handwerkzeugmaschine 10 zwischen 0,6 und 0,7 kg. Das Gewicht schließt ein Gewicht der wiederaufladbaren Batterie 26 und ein Gewicht des Bearbeitungswerkzeugs 48 mit ein.Another advantage of the handheld power tool 10 is the comparatively low weight of the handheld power tool 10 compared to the weights of handheld power tools of this type. The weight of the handheld power tool 10 is between 0.5 and 1.0 kg. The weight of the handheld power tool 10 is preferably between 0.6 and 0.7 kg. The weight includes a weight of the rechargeable battery 26 and a weight of the machining tool 48.

Ein weiterer Vorteil der Handwerkzeugmaschine 10 liegt in einer geringen Baugröße des Bearbeitungswerkzeugs 48. Das Bearbeitungswerkzeug 48 der Handwerkzeugmaschine 10 ist beispielsweise eine Schleif-, Trenn- oder Schruppscheibe. Das Bearbeitungswerkzeug 48 weist einen Durchmesser d auf, der zwischen 60 und 100 mm, besonders aber zwischen 70 und 90 mm liegt. Bevorzugt liegt der Durchmesser d des Bearbeitungswerkzeugs zwischen 75 und 80 mm. Diese Angaben berücksichtigen keine Abweichungen, die durch Fertigungstoleranzen auftreten können. Durch diese kompakte Ausgestaltung des Bearbeitungswerkzeuges 48 können hohe Umlaufgeschwindigkeiten des Bearbeitungswerkzeuges 48 erzielt werden. Beträgt die Drehzahl an der Werkzeugspindel beispielsweise 20 000 min-1, läuft ein Bearbeitungswerkzeug 48 mit einem Durchmesser d von 80 mm mit einer Geschwindigkeit von ca. 80m/s um.Another advantage of the handheld power tool 10 is the small size of the machining tool 48. The machining tool 48 of the handheld power tool 10 is, for example, a grinding, cutting or roughing disk. The machining tool 48 has a diameter d which is between 60 and 100 mm, but especially between 70 and 90 mm. The diameter d is preferably des Machining tool between 75 and 80 mm. This information does not take into account any deviations that may occur due to manufacturing tolerances. This compact design of the machining tool 48 enables high rotational speeds of the machining tool 48 to be achieved. If the speed on the tool spindle is 20,000 min -1 , for example, a machining tool 48 with a diameter d of 80 mm rotates at a speed of approx. 80 m / s.

Ein weiteres Maß für die Kompaktheit des Bearbeitungswerkzeuges und die Leistungsfähigkeit des elektromotorischen Antriebs 18 ist ein Verhältnis des Durchmessers d des Bearbeitungswerkzeugs 48 zum Durchmesser d1 des elektromotorischen Antriebs 18. In der bevorzugten Ausgestaltung beträgt das Verhältnis des Durchmessers d des Bearbeitungswerkzeugs 48 zum Durchmesser d1 des elektromotorischen Antriebs 18 zwischen 1,5 und 2,6, besonders aber zwischen 1,8 und 2,4. Bevorzugt liegt das Verhältnis des Durchmessers d des Bearbeitungswerkzeugs 48 zum Durchmesser d1 des elektromotorischen Antriebs 18 zwischen 1,9 und 2,1. Diese Angaben berücksichtigen keine Abweichungen, die durch Fertigungstoleranzen auftreten können.Another measure of the compactness of the machining tool and the performance of the electric motor drive 18 is a ratio of the diameter d of the machining tool 48 to the diameter d 1 of the electric motor drive 18. In the preferred embodiment, the ratio of the diameter d of the machining tool 48 to the diameter d 1 of the electric motor drive 18 between 1.5 and 2.6, but especially between 1.8 and 2.4. The ratio of the diameter d of the machining tool 48 to the diameter d 1 of the electromotive drive 18 is preferably between 1.9 and 2.1. This information does not take into account any deviations that may occur due to manufacturing tolerances.

Durch die Ausgestaltung der Handwerkzeugmaschine 10, des elektromotorischen Antriebs 18 und des Bearbeitungswerkzeugs 48, wird eine Schnitttiefe des Bearbeitungswerkzeugs 48 erreicht, die zwischen 20 und 25mm, bevorzugt aber zwischen 15 und 20 mm liegt.The design of the handheld power tool 10, the electric motor drive 18 and the machining tool 48 achieves a cutting depth of the machining tool 48 which is between 20 and 25 mm, but preferably between 15 and 20 mm.

Des Weiteren deckt eine Schutzhaube 49 einen Umfangbereich des Bearbeitungswerkzeugs 48 in radialer Richtung und einen sich radial erstreckenden Stirnbereich 50 der Handwerkzeugmaschine 10 axial ab.Furthermore, a protective hood 49 covers a circumferential area of the machining tool 48 in the radial direction and a radially extending end area 50 of the handheld power tool 10 axially.

Im Ausführungsbeispiel ist die Handwerkzeugmaschine 10 als batteriebetriebene Handwerkzeugmaschine 10 ausgebildet. Wie in Figur 1 ersichtlich ist an einer hinteren Seite 52 die wiederaufladbare Batterie 26 angeschlossen.In the exemplary embodiment, handheld power tool 10 is designed as a battery-operated handheld power tool 10. As in Figure 1 it can be seen that the rechargeable battery 26 is connected to a rear side 52.

Die Batteriespannung liegt in einem Bereich zwischen 3,6 und 36 V , besonders zwischen 7,2 und 14,4 V, beträgt bevorzugt aber 10,8V. Die Werte derThe battery voltage is in a range between 3.6 and 36 V, especially between 7.2 and 14.4 V, but is preferably 10.8V. The values of the

Batteriespannung berücksichtigen nicht mögliche Batteriespannungsschwankungen.Battery voltage do not take into account possible battery voltage fluctuations.

Die wiederaufladbare Batterie 26 besteht insbesondere aus Lithium Ionen Batteriezellen. Die wiederaufladbare Batterie 26 umfasst dabei eine oder mehrere Reihen von Batteriezellen, die wiederum parallel zueinander geschaltet sind. Jede einzelne Zelle weist eine Länge von ungefähr 65 mm und einen Durchmesser von ungefähr 18 mm auf. Es ist aber auch denkbar, dass eine Zelle eine Länge von 65 bis 70 mm und einen Durchmesser von 14 mm bis ungefähr 20 mm aufweist. Lithium Ionen Akkus zeichnen sich durch eine hohe Energiedichte und eine thermische Stabilität auch bei hohen Belastungen aus, was eine hohe Leistung bedeutet. Ein weiterer großer Vorteil ist die geringe Selbstentladung, die bewirkt, dass auch die Akkus auch bei längeren Standzeiten einsatzbereit sind. Aus diesen Vorteilen ergeben sich die Vorteile der erfindungsgemäßen Anwendung, insbesondere dass die batteriebetriebene Oberfräse 10 in ihren Abmessungen einerseits klein und kompakt werden kann und andererseits hohe Leistungen bringt.The rechargeable battery 26 consists in particular of lithium ion battery cells. The rechargeable battery 26 comprises one or more rows of battery cells, which in turn are connected in parallel to one another. Each individual cell is approximately 65 mm long and approximately 18 mm in diameter. However, it is also conceivable that a cell has a length of 65 to 70 mm and a diameter of 14 mm to approximately 20 mm. Lithium ion batteries are characterized by a high energy density and thermal stability even under high loads, which means high performance. Another great advantage is the low self-discharge, which means that the batteries are ready for use even after long periods of inactivity. These advantages result in the advantages of the application according to the invention, in particular that the battery-operated router 10 can be small and compact in terms of its dimensions on the one hand, and on the other hand provides high performance.

Es ist aber auch denkbar, dass die wiederaufladbare Batterie 26 aus Lithium-Luft-Zellen, aus Lithium-Schwefel-Zellen, Lithium-Polymer-Zellen oder dergleichen besteht. Des Weiteren kann die wiederaufladbare Batterie 26 in einer anderen als der gezeigten geometrischen Ausführung realisiert sein, wie zum Beispiel einer eckigen Ausführung.However, it is also conceivable that the rechargeable battery 26 consists of lithium-air cells, lithium-sulfur cells, lithium-polymer cells or the like. Furthermore, the rechargeable battery 26 can be implemented in a different geometric design than the one shown, such as an angular design, for example.

Eine Batteriespannungsanzeige 54 ist in der zweiten Gehäusehalbschale 15 integriert. Die Batteriespannungsanzeige 54 ist dazu vorgesehen, eine Höhe der Batteriespannung optisch anzuzeigen. Dies kann mit Hilfe von farblichen LED, aufblinkenden LED, digitalen Anzeigeelementen, LCD und dergleichen geschehen.A battery voltage indicator 54 is integrated in the second housing half-shell 15. The battery voltage display 54 is provided to visually display the level of the battery voltage. This can be done with the help of colored LEDs, flashing LEDs, digital display elements, LCD and the like.

Des Weiteren kann eine Sensorvorrichtung im zweiten Gehäuseteil 16 angeordnet sein, die ein beschädigtes und/oder falsch montiertes Bearbeitungswerkzeug und/oder das Verklemmen des Bearbeitungswerkzeugs und/oder das Bersten des Bearbeitungswerkzeugs 48 im Betrieb der Handwerkzeugmaschine 10 detektiert.Furthermore, a sensor device can be arranged in the second housing part 16, which detects a damaged and / or incorrectly mounted machining tool and / or the jamming of the machining tool and / or the bursting of the machining tool 48 is detected during operation of the handheld power tool 10.

Weiterhin ist es möglich, durch Betätigung eines Schaltelements eine Blockiervorrichtung zu aktivieren, um die Werkzeugspindel 22 zu arretieren. Die Blockiervorrichtung kann als Schieber, Stift oder Hebel ausgeführt sein. Die Spindelarretierung kann form- und /oder kraftschlüssig erfolgen. Dabei ist es denkbar, dass auf der Abtriebswelle 30 Elemente, wie beispielsweise Rast- oder Reibscheiben aufgebracht sind. Die Blockiervorrichtung kann als separates Bauteil ausgeführt sein. Es ist aber auch denkbar, dass die Blockiervorrichtung in ein bestehendes Bauteil integriert ist oder mit diesem kombiniert ist. Ein solches Bauteil kann ein Schaltelement, ein Stellelement oder dergleichen sein. Die Spindelarretierung kann automatisch erfolgen. Es ist aber auch vorstellbar, dass die Spindelarretierung manuell zu betätigen ist.It is also possible to activate a blocking device by actuating a switching element in order to lock the tool spindle 22. The blocking device can be designed as a slide, pin or lever. The spindle can be locked positively and / or non-positively. It is conceivable that elements such as locking or friction disks are applied to the output shaft 30. The blocking device can be designed as a separate component. However, it is also conceivable that the blocking device is integrated into an existing component or is combined with it. Such a component can be a switching element, an actuating element or the like. The spindle can be locked automatically. But it is also conceivable that the spindle lock can be actuated manually.

Im einem Ausführungsbeispiel ist die Handwerkzeugmaschine 10 sowohl in einem Energiesparmodus, als auch in einem Boostmodus betreibbar.In one exemplary embodiment, the handheld power tool 10 can be operated both in an energy-saving mode and in a boost mode.

In einem Ausführungsbeispiel in Figur 4 ist am ersten Gehäuseteil 14 der Handwerkzeugmaschine 10 eine Beleuchtungsvorrichtung 70 angeordnet. Die Beleuchtungsvorrichtung 70 kann aber auch am zweiten Gehäuseteil 16 angeordnet sein. Die Beleuchtungsvorrichtung 70 kann ein Arbeitsfeld ausleuchten, aber auch optische Informationen auf ein Werkstück und/oder eine Umgebung projizieren. Die Beleuchtungsvorrichtung 70 kann sowohl eine einzelne LED, als auch mehrere LEDs aufweisen. Die LEDs können in verschiedenen Bauformen und Größen vorgesehen sein. Die Beleuchtungsvorrichtung 70 kann aber auch als punktförmige Lichtquelle ausgeführt sein. Es ist aber auch denkbar, dass die Beleuchtungsvorrichtung 70 als Projektionsvorrichtung ausgeführt ist. Die Beleuchtungsvorrichtung 70 kann Beleuchtungselemente aufweisen, die verschiedengestaltig am ersten Gehäuseteil 14 und/oder am zweiten Gehäuseteil 16 angeordnet sein können.In one embodiment in Figure 4 a lighting device 70 is arranged on the first housing part 14 of the handheld power tool 10. The lighting device 70 can, however, also be arranged on the second housing part 16. The lighting device 70 can illuminate a work area, but can also project optical information onto a workpiece and / or an environment. The lighting device 70 can have both a single LED and a plurality of LEDs. The LEDs can be provided in various designs and sizes. The lighting device 70 can, however, also be designed as a point light source. However, it is also conceivable that the lighting device 70 is designed as a projection device. The lighting device 70 can have lighting elements which can be arranged in various forms on the first housing part 14 and / or on the second housing part 16.

Die Beleuchtungsvorrichtung 70 kann als eine optische Anzeigevorrichtung ausgeführt sein. Die optische Anzeigevorrichtung kann dazu vorgesehen sein, dem Bediener derHandwerkzeugmaschine 10 eine die Parameter der Handwerkzeugmaschine 10 betreffende Anzeige bereitzustellen. Die zur Handwerkzeugmaschine 10 zugehörigen Parameter sind mindestens folgende:

  • Ein Ladestand der wiederaufladbaren Batterie 26
  • Ein Überlastzustand der Handwerkzeugmaschine 10, insbesondere des elektromotorischen Antriebs 18, der Elektronik 32 und/oder der wiederaufladbaren Batterie 26
  • Eine Drehzahl des elektromotorischen Antriebs 18
  • Ein Strom, eine Spannung und/oder eine Temperatur des elektromotorischen Antriebs 18
  • Eine Temperatur des elektromotorischen Antriebs 18 und/oder der Elektronik 32
The lighting device 70 can be embodied as an optical display device. The optical display device can be provided to provide the operator of the handheld power tool 10 with a display relating to the parameters of the handheld power tool 10. The parameters associated with the handheld power tool 10 are at least the following:
  • A charge level of the rechargeable battery 26
  • An overload state of the handheld power tool 10, in particular of the electromotive drive 18, the electronics 32 and / or the rechargeable battery 26
  • A speed of the electric motor drive 18
  • A current, a voltage and / or a temperature of the electromotive drive 18
  • A temperature of the electromotive drive 18 and / or the electronics 32

Die Anzeige der Parameter der Handwerkzeugmaschine 10 kann beispielsweise durch folgende Anzeigemöglichkeiten realisiert werden:

  • Eine Änderung der Lichtfarbe
  • Eine Änderung der Lichtintensität
  • Lichtpulse unterschiedlicher Länge
  • Lichtpulse unterschiedlicher Helligkeit
  • Lauflicht mit Änderung der Laufrichtung des Lichts
  • Lichtpulse, variierend in Pulsfrequenz und/oder Helligkeit
The parameters of the handheld power tool 10 can be displayed, for example, using the following display options:
  • A change in the color of the light
  • A change in light intensity
  • Light pulses of different lengths
  • Light pulses of different brightness
  • Running light with a change in the direction of the light
  • Light pulses, varying in pulse frequency and / or brightness

Des Weiteren sind weitere dem Fachmann als sinnvoll erscheinende Anzeigen der Parameter der Handwerkzeugmaschine 10 möglich.Furthermore, further displays of the parameters of the handheld power tool 10 that appear sensible to the person skilled in the art are possible.

Claims (15)

  1. Portable power tool (10), in particular angle grinder, having at least one electromotive drive (18) acting on an output shaft (30), in particular an electronically commutated motor (20), which is intended to drive a tool spindle (22), having at least one first housing (12) that consists of at least one first housing half shell (13) and comprises at least one first housing part (14), which accommodates the electromotive drive (18), and a second housing part (16), which serves as a handle (24), and having a rechargeable battery (26) serving as energy source, characterized in that a ratio of a length 1 of the portable power tool (10) to a height h of the first housing part (14) is between 1.5 and 2.8, but in particular is 2.25, wherein the length 1 of the portable power tool (10) is defined inclusive of a length l1 of the rechargeable battery (26), wherein a ratio of the diameter (d) of the machining tool (48) to the diameter (d1) of the electromotive drive (18) is between 1.5 and 2.6, particularly between 1.8 and 2.4, but preferably between 1.9 and 2.1, wherein the electromotive drive (18) forms with the first housing part (14) a first common axis (28), wherein the length (1) of the portable power tool (10) is defined along a second axis (34), wherein the two axes (28, 34) are at an angle a to one another of between 60° and 120°, particularly between 80° and 100°, but preferably approximately 90°.
  2. Portable power tool (10) according to Claim 1, characterized in that the first common axis (28) is coaxial with the output shaft (30).
  3. Portable power tool (10) according to either of Claims 1 and 2, characterized in that the height h of the first housing part (14) along the first axis (28) is between 70 mm and 100 mm, but preferably is 80 mm.
  4. Portable power tool (10) according to one of the preceding claims, characterized in that at least one electronic system (32) for supplying power to the electromotive drive (18) is at least partially accommodated by the second housing part (16).
  5. Portable power tool (10) according to one of the preceding claims, characterized in that the rechargeable battery (26) forms together with the second housing part (16) a second common axis (34).
  6. Portable power tool (10) according to one of the preceding claims, characterized in that the length 1 of the portable power tool (10) along the second axis (34) is between 150 mm and 200 mm, but preferably is 180 mm.
  7. Portable power tool (10) according to one of the preceding claims, characterized in that a ratio of the length 1 of the portable power tool (10) to a circumference U of the second housing part (14) is between 0.8 and 1.8, in particular between 1.0 and 1.6, but preferably between 1.0 and 1.3.
  8. Portable power tool (10) according to one of the preceding claims, characterized in that the circumference U of the second housing part (16) is between 110 and 200 mm, in particular between 125 and 185 mm, but preferably between 150 and 175 mm, in order to allow the portable power tool (10) to be actuable in one-handed operation in any working position.
  9. Portable power tool (10) according to one of the preceding claims, characterized in that the electromotive drive (18) formed as an electronically commutated electric motor (20) directly drives the tool spindle (22) .
  10. Portable power tool (10) according to one of the preceding claims, characterized in that the electromotive drive (18) formed as an electronically commutated electric motor (20) is an internal rotor motor.
  11. Portable power tool (10) according to one of the preceding claims, characterized in that a rotational speed n at the tool spindle is greater than 12 000 min-1, but in particular less than or equal to 20 000 min-1.
  12. Portable power tool (10) according to one of the preceding claims, characterized in that at least one fan (46) is integrated in the first housing (14) between the electromotive drive (18) and a receptacle of a machining tool (48).
  13. Portable power tool (10) according to one of the preceding claims, characterized in that a weight of the portable power tool (10) is between 0.5 and 1.0 kg, but preferably between 0.6 and 0.7 kg.
  14. Portable power tool (10) according to one of the preceding claims, characterized in that a machining tool (48) has a diameter d of between 60 and 101 mm, particularly between 70 and 90 mm, but preferably between 75 and 80 mm.
  15. Portable power tool (10) according to either of Claims 1 and 14, characterized in that a depth of cut of the machining tool (48) is between 20 and 25 mm, preferably between 15 and 20 mm.
EP20159673.1A 2013-08-09 2014-06-23 Handheld machine tool with an electro-motor drive Active EP3689553B1 (en)

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PL20159673T PL3689553T3 (en) 2013-08-09 2014-06-23 Handheld machine tool with an electro-motor drive
EP21189051.2A EP3936284A1 (en) 2013-08-09 2014-06-23 Handheld machine tool with an electro-motor drive as direct drive

Applications Claiming Priority (4)

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DE102013215821.1A DE102013215821A1 (en) 2013-08-09 2013-08-09 Hand tool with an electric motor drive as a direct drive
EP17195361.5A EP3296065B1 (en) 2013-08-09 2014-06-23 Handheld machine tool with an electro-motor drive as direct drive
EP14734767.8A EP3030383B1 (en) 2013-08-09 2014-06-23 Angle grinder having an electromotive direct drive
PCT/EP2014/063099 WO2015018557A1 (en) 2013-08-09 2014-06-23 Portable power tool having an electromotive direct drive

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EP17195361.5A Division EP3296065B1 (en) 2013-08-09 2014-06-23 Handheld machine tool with an electro-motor drive as direct drive
EP14734767.8A Division EP3030383B1 (en) 2013-08-09 2014-06-23 Angle grinder having an electromotive direct drive

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EP3689553A1 EP3689553A1 (en) 2020-08-05
EP3689553B1 true EP3689553B1 (en) 2021-09-01

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EP14734767.8A Active EP3030383B1 (en) 2013-08-09 2014-06-23 Angle grinder having an electromotive direct drive
EP20159673.1A Active EP3689553B1 (en) 2013-08-09 2014-06-23 Handheld machine tool with an electro-motor drive
EP21189051.2A Pending EP3936284A1 (en) 2013-08-09 2014-06-23 Handheld machine tool with an electro-motor drive as direct drive
EP17195361.5A Active EP3296065B1 (en) 2013-08-09 2014-06-23 Handheld machine tool with an electro-motor drive as direct drive

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US (3) US10730175B2 (en)
EP (4) EP3030383B1 (en)
CN (2) CN114211367A (en)
DE (1) DE102013215821A1 (en)
ES (3) ES2792039T3 (en)
PL (3) PL3689553T3 (en)
WO (1) WO2015018557A1 (en)

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CN114211367A (en) 2022-03-22
EP3689553A1 (en) 2020-08-05
EP3296065A1 (en) 2018-03-21
EP3030383A1 (en) 2016-06-15
PL3030383T3 (en) 2020-03-31
US11518019B2 (en) 2022-12-06
US20160199958A1 (en) 2016-07-14
US20200246959A1 (en) 2020-08-06
ES2792039T3 (en) 2020-11-06
EP3296065B1 (en) 2020-03-25
US11938611B2 (en) 2024-03-26
PL3296065T3 (en) 2020-09-21
EP3936284A1 (en) 2022-01-12
WO2015018557A1 (en) 2015-02-12
ES2899436T3 (en) 2022-03-11
PL3689553T3 (en) 2021-12-13
ES2760025T3 (en) 2020-05-12
EP3030383B1 (en) 2019-09-04
CN105451947A (en) 2016-03-30
US20230067184A1 (en) 2023-03-02
DE102013215821A1 (en) 2015-02-12
US10730175B2 (en) 2020-08-04

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