EP2745994A2 - Manually held power tool - Google Patents
Manually held power tool Download PDFInfo
- Publication number
- EP2745994A2 EP2745994A2 EP20130186281 EP13186281A EP2745994A2 EP 2745994 A2 EP2745994 A2 EP 2745994A2 EP 20130186281 EP20130186281 EP 20130186281 EP 13186281 A EP13186281 A EP 13186281A EP 2745994 A2 EP2745994 A2 EP 2745994A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- drive motor
- actuating element
- tool
- unit
- power tool
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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- 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
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- 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
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/02—Construction of casings, bodies or handles
Definitions
- a handheld power tool in particular a cordless power tool, with at least one drive motor, at least one gear unit, at least one connecting drive train unit for transmitting power from the drive motor to the gear unit and at least one actuating element, wherein the connecting drive train unit is guided past the actuating element, is proposed.
- a “machine tool” is to be understood as meaning a machine tool that can be guided with one or two hands of an operator and, in particular, is different from a stationarily mounted machine tool.
- a “cordless power tool” is to be understood in particular as meaning a hand tool machine which is supplied with power by a rechargeable battery and / or a battery and which is preferably guided by one hand, with a two-handed guide being provided for stabilizing the rechargeable battery power tool during use.
- the cordless power tool can be designed as a cordless driller, cordless hammer, a cordless drilling machine, a Akkutschschraubmaschine or preferably as a cordless screwdriver.
- the hand tool machine formed in a pistol shape.
- a “pistol mold” is to be understood in particular as a form of the power tool with a handle, in which the power tool can be guided by one hand on the handle and an operation of the actuator with fingers of one hand, which grips the handle, can be performed without a handle to give up the leadership of the power tool.
- An “actuating element” is to be understood in particular as an element by means of which a functional adjustment of a handheld power tool, in particular a cordless power tool, can be carried out, in particular a switching on or off or setting of power values of the cordless power tool.
- the actuating element is designed as a pressure switch and particularly preferably as a trigger switch.
- the actuating element can also be designed differently, for example as a rotary switch or as a touch display.
- the actuating element is arranged adjacent to the upper housing component in an embodiment of the hand tool in pistol shape on the upper housing component or on the handle directly.
- a "trigger switch" is to be understood in particular a trained in a trigger form switch which is operated with at least one finger and after exceeding a certain pressure threshold, a pressure on the trigger switch causes a function setting, after exceeding the pressure threshold, the function setting varies linearly with pressure changes can be trained.
- the drive motor is provided for driving a tool mounted in the tool receiving unit.
- the drive motor is formed by an electric motor and particularly preferably by a brushless DC motor (BLDC motor), which is supplied in particular by a battery of a cordless power tool with power.
- BLDC motor brushless DC motor
- connection drive train unit is to be understood in particular a unit with at least one substantially rod-shaped connection drive train for power transmission, which is preferably rotatably mounted, which is connected at one end to the drive motor and driven by this and at another end with the Tool receiving unit is connected and transmits a force of the drive motor to this.
- a gear unit can be arranged in front of or behind the connecting drive train, this gear unit preferably being arranged between the connecting drive train and the tool receiving unit.
- the connection drive train unit transfers in particular forces from the drive motor to the gear unit to a drive of the tool receiving unit and / or to a drive of a recorded in the tool receiving unit insert tool.
- the connecting drive train unit is at least partially separated from the actuating element by a housing of the handheld power tool.
- the gear unit arranged at least partially after the actuating element and preferably the actuating element is arranged completely in a region between the drive motor and actuator.
- the connecting drive train unit runs at least substantially parallel to the central axis of the tool receiving unit and parallel to a longitudinal extent of an actuating finger guard space in which the actuating element is arranged.
- gear unit and drive motor are arranged such that a arranged within the power tool machine shortest connecting line between the gear unit and drive motor deviates from a straight line. It can be achieved in particular a compact hand tool and a high flexibility of an arrangement of the actuating element.
- a pistol grip is to be understood as meaning, in particular, a handle projecting at least substantially vertically from an upper housing component, which has the tool receiving unit, to a one-handed guidance of the handheld power tool, wherein a user with one or more fingers of a hand, with whom he grips the pistol grip Guiding the power tool engages around an actuator of the cordless machine tool can operate without giving up a grip on the pistol grip.
- at least substantially perpendicular is to be understood in particular that an angle between Pistol grip and upper housing component by a maximum of twenty, advantageously deviates by a maximum of ten and preferably at most a degree of 90 degrees.
- the pistol grip may protrude at an angle of 90 degrees from the upper housing member.
- an advantageous grip ergonomics can be achieved.
- the connecting drive train unit runs at least substantially above the actuating element.
- the connecting drive train unit extends at least substantially above the actuating element.
- the connecting drive train unit is arranged on a side facing away from the top of the power tool and the handle side of the actuating element and that at least sixty, preferably at least eighty and preferably one hundred percent a longitudinal extent of the connecting drive train unit are arranged in a region above a projection of the actuating element in a direction perpendicular to a height direction of the actuating element.
- the connecting drive train unit can also be guided below, to the left or to the right of the actuating element. In particular, a compact handheld power tool can be achieved.
- a tool receiving unit with a central axis which extends at least through a vicinity of the actuating element is proposed.
- a “tool receiving unit” is to be understood in particular as a unit of the handheld power tool which is intended to receive and fasten an insert tool, for example a bit of a screwdriver or a drill bit.
- the tool receiving unit for this purpose has an advantageously at least substantially cylindrical receiving area for the tool.
- the tool receiving unit is arranged in particular on an upper housing of a cordless machine tool.
- a "center axis of the tool receiving unit” should in particular be understood to mean a straight line extending in the center through the receiving area for the tool in an orientation direction of a tool taken up.
- the central axis of the tool receiving unit corresponds to a force series of the hand tool.
- a "near zone” is to be understood in particular a region around the actuating element, which is limited by a distance of a maximum of 5 mm from the actuating element. Due to the inventive design of the power tool In particular, improved guidance of a handheld power tool and improved grip ergonomics can be achieved.
- the central axis of the tool receiving unit extends through the actuating element.
- improved guidance of a handheld power tool and improved grip ergonomics can be achieved.
- actuating finger protection space is to be understood in particular as meaning a space bounded on at least three sides by a housing of a cordless power tool and intended to receive at least one finger of an operator of the cordless power tool and to provide at least one guidance area for the finger during actuation of the actuating element
- the finger in addition to any injuries, in particular by possibly during use of the power tool flying around pieces of material or slipping of the power tool to protect.
- advantageous guidance and protection of the finger during actuation of the actuating element can be achieved.
- the Betjansfingerschutzraum is formed closed at least four sides.
- the Betjansfingerschutzraum is bounded on one side by a connecting web and closed.
- the side bounded by the connecting land is formed by a side of the actuating finger protecting space located in a ventral direction.
- a "ventral direction" is to be understood in particular as meaning a direction running perpendicular to the central axis of the tool receiving unit, along which the handle extends substantially.
- an advantageous guidance of the finger can be achieved when contacting the actuating element.
- the Betjansfingerschutzraum has a height extension of at least 2 cm.
- a "height extension" of the actuating finger protective space is to be understood in particular to mean an extension of the actuating finger protective space in a direction perpendicular to an actuating direction of the actuating element, in which a finger width extends when the finger touches the actuating element.
- the Betchanistsfingerstoffraum a height extent that allows actuation of the actuator with two fingers. In particular, a secure guidance of a handheld power tool and a secure operation of the actuating element can be achieved.
- a handle is proposed within which the drive motor is at least substantially arranged.
- the drive motor is at least seventy, advantageously at least ninety, and more preferably one hundred percent of its volume within the handle.
- the handle is formed by a pistol grip. The arrangement of the drive motor in the handle can be achieved in particular an improved leadership of a hand tool and improved grip ergonomics.
- the drive motor is arranged at least partially in a region located behind the actuating element, as viewed from the tool receiving unit.
- the drive motor is provided for driving a tool mounted in the tool receiving unit.
- the drive motor is formed by an electric motor and particularly preferably by a brushless DC motor (BLDC motor), which is supplied in particular by a battery of a cordless power tool with power.
- BLDC motor brushless DC motor
- the drive motor is arranged at least partially in a region of the handheld power tool which extends on a parallel to the central axis and is located in a direction away from the tool receiving unit direction projection of the actuating element.
- improved guidance of a handheld power tool and improved grip ergonomics can be achieved.
- At least one Umlenkgetriebehim is proposed, which connects the connecting drive train unit with the drive motor.
- a "deflection gear unit” is to be understood in particular as meaning a gear unit which changes a rotational movement at least in one direction.
- the deflection gear unit is provided to a arranged in the handle drive motor, at least substantially in a direction perpendicular to the central axis of the Tool receiving unit is oriented to connect to a at least substantially parallel to the central axis extending connecting drive train unit and to transmit a rotational movement of the output shaft of the drive motor to the connecting drive train unit. It can be achieved in particular structurally simple advantageous advantageous space-saving and ergonomic positioning of the drive motor.
- the hand tool according to the invention should not be limited to the application and embodiment described above.
- the handheld power tool according to the invention may have a different number from a number of individual elements, components and units mentioned herein for performing a function described herein.
- Fig. 1 shows a hand tool according to the invention, which is designed as a cordless machine tool 10a.
- the cordless power tool 10a is designed as a cordless screwdriver.
- the cordless power tool 10a is formed in a gun shape and has a handle 38a to which the cordless power tool 10a is gripped for use and guidance.
- the cordless power tool 10a is provided for a one-handed guidance by gripping the handle 38a, wherein basically a second hand of a user can be used to guide the cordless power tool 10a, for example, to seize an upper housing member 34a.
- the handle 38a is designed as a pistol grip 12a.
- the cordless power tool 10a comprises, in the example shown, an actuator 20a and a tool receiving unit 14a provided for receiving a screw for screwing.
- a power supply unit 36a formed by a rechargeable battery is arranged in the handle 38a in a lower region facing away from the floor in a normal operation and remote from the upper housing component 34a.
- a power supply unit 36a designed as a battery can be used instead of a battery-formed power supply unit 36a.
- the lower portion, in which the power supply unit 36a is arranged, is formed projecting forward as seen in a direction toward the tool holder.
- a further actuating element 48a is arranged on the handle 38a, which cooperates with the actuating element 20a for connecting and / or adjusting the cordless power tool 10a.
- the further actuating element 48a can be dispensed with.
- a central axis 16a of the tool receiving unit 14a extends through the actuator 20a and thus through a vicinity of the actuator 20a.
- the central axis 16a of the tool receiving unit 14a may also be spaced, for example, by a distance of 5 mm above an upper end of the actuator 20a or at a smaller distance therefrom.
- the central axis 16a of the tool receiving unit 14a is spaced from a center of the actuator 20a, and two-thirds of a longitudinal extent of the actuator 20a extends on a side of the central axis 16a facing the handle 38a, which faces the floor in normal operation.
- the actuator 20a thus extends largely on a side facing the handle 38a side of the central axis 16a, which faces the ground in a normal operation. Due to such a course of the central axis 16a, advantageous ergonomics can be achieved by operating the operating member 20a and guiding the cordless power tool 10a, since a power line of the cordless power tool 10a passing along the center axis 16a of the tool receiving unit 14a is provided by a user's hand and below at least one operating finger of the user runs, whereby unwanted torques on the hand can be avoided.
- the cordless power tool 10a has an actuating finger protection space 22a, in which the actuating element 20a is arranged.
- the central axis 16a of the tool receiving unit 14a thus also extends through the actuating finger guard space 22a.
- the Betsch Trentsfingerschraum 22a is formed on a parallel to the central axis 16a extending, the handle 38a facing side closed and closed there by a connecting web 24a between two portions of the upper housing member 34a.
- the connecting web 24a is disposed on a side facing the ground in a normal operating state of the central axis 16a of the tool receiving unit 14a and provides a contact surface for a user's operating finger and protection against any sharp edges or splinters of an environment.
- the Betschistsfingerschutzraum 22a has a height extension of 5 cm, whereby actuation of the actuator 20a by means of two fingers is possible.
- the height extent is formed by an extension of the actuating finger guard space 22a that runs perpendicular to a longitudinal extent of the actuating finger guard space 22a and substantially perpendicular to the center axis 16a of the tool receiving unit 14a. In a normal operating state of the cordless power tool 10a, this extends parallel to a surface normal of the base.
- the actuating finger guard space 22a may have a smaller height extension in alternative embodiments, so that the actuating element 20a can be actuated only with an actuating finger.
- the cordless power tool 10a comprises a drive motor 26a, which is arranged at least partially in a region situated behind the actuating element 20a, as seen by the tool receiving unit 14a.
- a drive motor 26a In a projection of the actuating element 20a along a direction away from the tool receiving unit 14a, parallel to the central axis 16a extending direction, so is located in about one half of the drive motor 26a within a section cut by the projection, a further half extends in the direction of the handle 38a below, facing a floor in a normal operating condition.
- the drive motor 26a is disposed inside the handle 38a.
- the central axis 16a of the tool receiving unit 14a extends through the drive motor 26a and passes through this in an upper, an upper side of the cordless power tool 10a facing area.
- the upper side of the cordless power tool 10a is arranged opposite the handle 38a and away from the handle 38a.
- a motor shaft 28a of the drive motor 26a includes an angle of 70 degrees with the central
- the cordless power tool 10a further includes a connection drive string unit 30a for transmitting power from the drive motor 26a to the tool receiving unit 14a extending at least substantially laterally of the operation finger guard space 22a.
- the linkage drive train unit 30a has a rotatably mounted linkage drive train connected at one end to a transmission and at another end having a recirculating disc with a tapered surface which meshes with a beveled beveled orbital driven disc of an output shaft of the drive motor 26a.
- the rotating disks form a deflection gear unit 32a of the cordless power tool 10a, which connects the connecting drive wire unit 30a to the drive motor 26a.
- a transmission unit 18a connects the connecting drive train unit 30a to the tool receiving unit 14a, and is provided for matching a rotational speed of the output shaft of the drive motor 26a to a designated rotational speed of the tool receiving unit 14a by means of a constant and / or a variable ratio.
- the gear unit 18a may be formed, for example, as a planetary gear, wherein the connecting drive train unit 30a drive, for example, a sun or planetary gear, a ring gear or a planet carrier.
- the cordless power tool 10a may be formed in alternative embodiments, for example, as Akkutschschraubmaschine or as Akkuschlagbohrmaschine and the gear unit 18a for this purpose, for example, instead of or in addition to a screw transmission a transmission with a Schlagschraubmechanismus, a transmission with a detent disc for impact drilling or a transmission with a hammer mechanism include.
- FIGS. 2 to 6 five further embodiments of the invention are shown.
- the following descriptions and the drawings are essentially limited to the differences between the exemplary embodiments, with reference in principle to the same reference components, in particular with respect to components with the same reference numerals, to the drawings and / or the description of the other embodiments, in particular FIG. 1 is referenced.
- To distinguish the embodiments of the letter a is the reference numerals of the embodiment in the FIG. 1 readjusted.
- the letter a is replaced by the letters b to f.
- the alternative embodiment of a cordless machine tool 10b in Fig. 2 is substantially identical to the previous embodiment and differs therefrom only by an additional handle protection member 40b extending from the upper housing member 34b in a normal operating state facing the floor and in a viewing direction through the upper housing member 34b along a central axis 16b a tool receiving unit 14b is arranged behind a designed as a pistol grip 12b handle 38b.
- the handle protection element 40b is provided to provide an additional protection for a hand of a user in a leadership of the cordless power tool 10b, which surrounds the handle 38b.
- Another actuator 48b for operating the cordless power tool 10b is disposed on the handle protection member 40b.
- Fig. 3 shows a section of an alternative battery-powered machine tool 10c, which is designed as a cordless screwdriver, which is constructed substantially analogously to the previous embodiments.
- a central axis 16c of a tool receiving unit not shown in the detail shown extends through a near area and in particular directly through an actuating element 20c, which is arranged in an actuating finger protective space 22c.
- the cordless power tool 10c comprises a handle 38c designed as a pistol grip 12c, within which a drive motor 26c is arranged, and an upper housing component 34c, in which the actuating finger guard space 22c is arranged.
- the Betquestioned whysfingerschutzraum 22c is formed by a connecting web 24c down, that is formed on a parallel to the central axis 16c extending, the handle 38c side facing closed.
- the drive motor 26c has a diameter of 28mm and a length of 54mm, which is more than one and a half times the diameter.
- the drive motor 26 c is designed as a brushless DC motor, that is, as a DC motor with an electronic circuit that replaces an otherwise necessary in DC motors mechanical commutator with brushes for current application for generating a rotating magnetic field from a direct current.
- the cordless power tool 10c further comprises a fan unit 42c provided for ventilation and cooling of the drive motor 26c, which is integrated in the drive motor 26c.
- the fan unit 42 c sucks on the handle 38 c in a region below the drive motor 26 c, ie on a side facing away from the upper housing member 34 c side of the drive motor 26 c, air passage openings 44 c air from a space outside the cordless power tool 10 c to a cooling of the drive motor 26 c.
- a blow-out of heated exhaust air takes place through further air passage openings 46c, which are arranged radially to an upper region of the drive motor 26c.
- the fan unit 42c is thus partially disposed in an upper portion of the drive motor 26c.
- air can also be sucked in via the further air passage openings 46c and blown out via the air passage openings 44c.
- the drive motor 26c is cooled by the integrated fan unit 42c from the inside.
- a deflection gear unit 32c connects the drive motor 26c to a connection drive train unit 30c, and redirects power flow from a direction of a motor shaft 28c of the drive motor 26c, which is perpendicular to the center axis 16c, to a direction of the connection drive train unit 30c parallel to the center axis 16c.
- the motor shaft 28c may also include an angle other than ninety degrees with the central axis 16c.
- a cordless power tool 10d this is essentially analogous to the previous exemplary embodiment with an upper housing component 34d and a handle 38d designed as a pistol grip 12d. Disposed in the handle 38d is a drive motor 26d which is connected to a linkage drive string unit 30d in the upper housing member 34d by means of a diverter gear unit 32d, the diverter gear unit 32d providing a force flow from a direction of a motor shaft 28d perpendicular to a central axis 16d Direction of the connecting drive train unit 30 d, which runs parallel to the central axis 16 d, deflects.
- the motor shaft 28d can also enclose an angle other than ninety degrees with the central axis 16d.
- the connection drive train unit 30d is guided past an actuator 20d disposed in an actuator finger guard room 22d in the upper housing member 34d.
- the drive motor 26d has a diameter of 28mm and a length of 54mm, which is more than one and a half times the diameter.
- the drive motor 26d is designed as a brushless DC motor, that is, as a DC motor with an electronic circuit that replaces an otherwise necessary in DC motors mechanical commutator with brushes for current application to generate a rotating magnetic field from a direct current.
- the cordless power tool 10d further comprises a fan unit 42d provided for ventilating and cooling the drive motor 26d, which is integrated in the drive motor 26d.
- the fan unit 42d is arranged in a lower region of the drive motor 26d and sucks on the handle 38d in an area below the drive motor 26d, ie on a side facing away from the upper housing member 34d side of the drive motor 26d, air passage openings 44d air from a space outside of the cordless power tool 10d to a cooling of the drive motor 26d. Blowing out of heated air takes place via further air passage openings 46d arranged radially on the drive motor 26d in a lower region. In principle, in an alternative embodiment, air can also be sucked in via the further air passage openings 46d and blown out via the air passage openings 44d.
- the air sucked through the air passage openings 44d flows outside on the drive motor 26d and thus cools it from the outside and is passed through the fan unit 42d from above, ie from a side facing the upper housing member 34d for cooling from the inside by the drive motor 26d before it is blown out through the air passage openings 46d.
- the drive motor 26d is thus cooled from inside and outside.
- the air passage openings 44d, 46d are arranged at a suitable distance from the actuating element 20d, so that they are not covered by a user's hand in the case of an intended one-handed guidance of the cordless power tool 10d.
- a fan unit 42e for ventilating and cooling a drive motor 26e arranged in a handle 38e designed as a pistol grip 12e is integrated in the drive motor 26e and arranged in an upper area of the drive motor 26e.
- the fan unit 42e has an air passage opening 44f which is arranged above the drive motor 26f and sucks over at the handle 38e in an area below of the drive motor 26e, ie on a side of the drive motor 26e facing away from an upper housing component 34e, air passages 44e arranged from a space outside of a cordless power tool 10e to a cooling of the drive motor 26e.
- Blowing out of heated air takes place via further air passage openings 46e arranged radially on the drive motor 26e in a lower region.
- air can also be sucked in via the further air passage openings 46e and blown out via the air passage openings 44e.
- the air sucked in through the air passage openings 44e flows outside on the drive motor 26e and thus cools it from the outside and is guided by the fan unit 42e from above, ie from a side facing the upper housing member 34e, for cooling from inside through the drive motor 26e it is blown out through the air passage openings 46e.
- the drive motor 26e is thus cooled internally and externally.
- the air passage openings 44e, 46e are arranged at a suitable distance to an actuating element 20e, so that they are not covered by a user's hand in the case of an intended one-handed guidance of a cordless power tool 10e.
- a fan unit 42f is arranged outside the drive motor 26f for a drive motor 26f arranged in a handle 38f designed as a pistol grip 12f.
- the fan unit 42f is disposed below the drive motor 26f, that is, disposed in a portion of the handle 38f from which the drive motor 26f is located between the area and the upper housing member 34f.
- the fan unit 42f sucks in air from a space outside a cordless power tool 10f to a cooling of the drive motor 26f via the handle 38f in an area below the drive motor 26f, ie on a side of the drive motor 26f facing away from an upper housing component 34f.
- Blowing out of heated air takes place via further air passage openings 46f arranged radially on the drive motor 26f in a lower region.
- air can also be sucked in via the further air passage openings 46f and blown out via the air passage openings 44f.
- the air sucked in through the air passage openings 44f flows outside on the drive motor 26f and thus cools it from the outside, and is guided from above by the fan unit 42f from above through the drive motor 26f from above, ie, from a side facing the upper housing member 34f she through the Air passage openings 46f is blown out.
- the drive motor 26f is thus cooled internally and externally.
- the air passage openings 44f, 46f are arranged at a suitable distance from an actuating element 20f, so that they are not covered by a user's hand in the case of an intended one-handed guidance of a cordless power tool 10f.
Abstract
Description
Handelsübliche Akkuwerkzeugmaschinen in Pistolenform weisen ein oberes Gehäusebauteil auf, an dem eine Werkzeugaufnahmeeinheit angeordnet ist. Hinter der Werkzeugaufnahmeeinheit sind eine Getriebeeinheit zu einem Antrieb eines Werkzeugs und ein Antriebsmotor zu einem Antrieb der Getriebeeinheit angeordnet.Commercially available pistol machine gun tools have an upper housing member on which a tool receiving unit is arranged. Behind the tool receiving unit, a gear unit to a drive of a tool and a drive motor to a drive of the gear unit are arranged.
Es wird eine Handwerkzeugmaschine, insbesondere eine Akkuwerkzeugmaschine, mit zumindest einem Antriebsmotor, zumindest einer Getriebeeinheit, zumindest einer Verbindungsantriebsstrangeinheit zu einer Kraftübertragung von dem Antriebsmotor auf die Getriebeeinheit und zumindest einem Betätigungselement, wobei die Verbindungsantriebsstrangeinheit an dem Betätigungselement vorbeigeführt ist, vorgeschlagen.A handheld power tool, in particular a cordless power tool, with at least one drive motor, at least one gear unit, at least one connecting drive train unit for transmitting power from the drive motor to the gear unit and at least one actuating element, wherein the connecting drive train unit is guided past the actuating element, is proposed.
Unter einer "Handwerkzeugmaschine" soll insbesondere eine Werkzeugmaschine, die mit einer oder mit zwei Händen eines Bedieners geführt werden kann und insbesondere von einer ortsfest angebrachten Werkzeugmaschine verschieden ist, verstanden werden. Unter einer "Akkuwerkzeugmaschine" soll insbesondere eine Handwerkzeugmaschine verstanden werden, die mit einem Akku und/oder einer Batterie mit Strom versorgt wird und die vorzugsweise einhändig geführt wird, wobei zu einer Stabilisierung der Akkuwerkzeugmaschine bei einer Benutzung eine zweihändige Führung vorgesehen sein kann. Beispielsweise kann die Akkuwerkzeugmaschine als ein Akkubohrer, Akkubohrhammer, eine Akkuschlagbohrmaschine, eine Akkuschlagschraubmaschine oder vorzugsweise als ein Akkuschrauber ausgebildet sein. Vorzugsweise ist die Handwerkzeugmaschine in einer Pistolenform ausgebildet. Unter einer "Pistolenform" soll insbesondere eine Form der Handwerkzeugmaschine mit einem Handgriff verstanden werden, bei der die Handwerkzeugmaschine einhändig an dem Handgriff geführt werden kann und eine Bedienung des Betätigungselements mit Fingern einer Hand, die den Handgriff ergreift, durchgeführt werden kann, ohne einen Griff zur Führung der Handwerkzeugmaschine aufzugeben. Unter einem "Betätigungselement" soll insbesondere ein Element verstanden werden, mittels dem eine Funktionseinstellung einer Handwerkzeugmaschine, insbesondere einer Akkuwerkzeugmaschine, vorgenommen werden kann, insbesondere ein An- oder Ausschalten oder eine Einstellung von Leistungswerten der Akkuwerkzeugmaschine. Vorzugsweise ist das Betätigungselement als ein Druckschalter und besonders vorzugsweise als ein Triggerschalter ausgebildet. Grundsätzlich kann das Betätigungselement auch andersartig ausgebildet sein, beispielsweise als ein Drehschalter oder als ein Touch-Display. Vorzugsweise ist das Betätigungselement bei einer Ausbildung der Handwerkzeugmaschine in Pistolenform an dem oberen Gehäusebauteil oder an dem Handgriff unmittelbar dem oberen Gehäusebauteil benachbart angeordnet. Unter einem "Triggerschalter" soll insbesondere ein in einer Abzugsform ausgebildeter Schalter verstanden werden, der mit zumindest einem Finger betätigt wird und nach einem Überschreiten einer bestimmten Druckschwelle ein Druck auf den Triggerschalter eine Funktionseinstellung bewirkt, wobei nach Überschreiten der Druckschwelle die Funktionseinstellung linear mit Druckänderungen veränderlich ausgebildet sein kann. Insbesondere ist der Antriebsmotor zu einem Antrieb eines in der Werkzeugaufnahmeeinheit gelagerten Werkzeugs vorgesehen. Vorzugsweise ist der Antriebsmotor von einem Elektromotor und besonders vorzugsweise von einem bürstenlosen Gleichstrommotor (BLDC-Motor) gebildet, der insbesondere von einem Akku einer Akkuwerkzeugmaschine mit Strom versorgt wird.In particular, a "machine tool" is to be understood as meaning a machine tool that can be guided with one or two hands of an operator and, in particular, is different from a stationarily mounted machine tool. A "cordless power tool" is to be understood in particular as meaning a hand tool machine which is supplied with power by a rechargeable battery and / or a battery and which is preferably guided by one hand, with a two-handed guide being provided for stabilizing the rechargeable battery power tool during use. For example, the cordless power tool can be designed as a cordless driller, cordless hammer, a cordless drilling machine, a Akkuschlagschraubmaschine or preferably as a cordless screwdriver. Preferably the hand tool machine formed in a pistol shape. A "pistol mold" is to be understood in particular as a form of the power tool with a handle, in which the power tool can be guided by one hand on the handle and an operation of the actuator with fingers of one hand, which grips the handle, can be performed without a handle to give up the leadership of the power tool. An "actuating element" is to be understood in particular as an element by means of which a functional adjustment of a handheld power tool, in particular a cordless power tool, can be carried out, in particular a switching on or off or setting of power values of the cordless power tool. Preferably, the actuating element is designed as a pressure switch and particularly preferably as a trigger switch. In principle, the actuating element can also be designed differently, for example as a rotary switch or as a touch display. Preferably, the actuating element is arranged adjacent to the upper housing component in an embodiment of the hand tool in pistol shape on the upper housing component or on the handle directly. A "trigger switch" is to be understood in particular a trained in a trigger form switch which is operated with at least one finger and after exceeding a certain pressure threshold, a pressure on the trigger switch causes a function setting, after exceeding the pressure threshold, the function setting varies linearly with pressure changes can be trained. In particular, the drive motor is provided for driving a tool mounted in the tool receiving unit. Preferably, the drive motor is formed by an electric motor and particularly preferably by a brushless DC motor (BLDC motor), which is supplied in particular by a battery of a cordless power tool with power.
Unter einer "Verbindungsantriebsstrangeinheit" soll insbesondere eine Einheit mit zumindest einem im Wesentlichen stabförmig ausgebildeten Verbindungsantriebsstrang zur Kraftübertragung, der vorzugsweise drehbar gelagert ist, verstanden werden, die an einem Ende mit dem Antriebsmotor verbunden ist und von diesem angetrieben wird und an einem weiteren Ende mit der Werkzeugaufnahmeeinheit verbunden ist und eine Kraft des Antriebsmotors auf diese überträgt. In Kraftflussrichtung von dem Antriebsmotor auf die Werkzeugaufnahmeeinheit kann vor oder hinter dem Verbindungsantriebsstrang eine Getriebeeinheit angeordnet sein, wobei diese bevorzugt zwischen Verbindungsantriebsstrang und Werkzeugaufnahmeeinheit angeordnet ist. Die Verbindungsantriebsstrangeinheit überträgt insbesondere Kräfte von dem Antriebsmotor auf die Getriebeeinheit zu einem Antrieb der Werkzeugaufnahmeeinheit und/oder zu einem Antrieb eines in der Werkzeugaufnahmeeinheit aufgenommenen Einsatzwerkzeugs. Unter "vorbeigeführt" soll insbesondere verstanden werden, dass insbesondere aufgrund einer Position des zumindest einen Betätigungselements an der Handwerkzeugmaschine ein Weg der Kraftübertragung von dem Antriebsmotor auf die Werkzeugaufnahmeeinheit länger ausfällt als ein Weg der Kraftübertragung bei einem hypothetischen Verlauf der Verbindungsantriebsstrangeinheit durch die Position des Betätigungselements an der Handwerkzeugmaschine, wobei der Verbindungsantriebsstrang bei dem hypothetischen Verlauf der Verbindungsantriebsstrangeinheit durch die Position des Betätigungselements an der Handwerkzeugmaschine abgesehen von einem Durchgang durch einen eventuellen Betätigungsfingerschutzraum insbesondere vollständig innerhalb des Gehäuses der Handwerkzeugmaschine verläuft. Vorzugsweise ist die Verbindungsantriebsstrangeinheit durch ein Gehäuse der Handwerkzeugmaschine von dem Betätigungselement zumindest teilweise getrennt angeordnet. Insbesondere ist in eine Bearbeitungsrichtung betrachtet der Antriebsmotor zumindest teilweise vor dem Betätigungselement angeordnet, die Getriebeeinheit zumindest teilweise nach dem Betätigungselement angeordneten und vorzugsweise ist das Betätigungselement vollständig in einem Bereich zwischen Antriebsmotor und Betätigungselement angeordnet. Vorzugsweise verläuft die Verbindungsantriebsstrangeinheit zumindest im Wesentlichen parallel zu der Mittelachse der Werkzeugaufnahmeeinheit und parallel zu einer Längserstreckung eines Betätigungsfingerschutzraums, in dem das Betätigungselement angeordnet ist. Vorzugsweise sind Getriebeeinheit und Antriebsmotor derart angeordnet, dass eine innerhalb der Handwerkzeugmaschine angeordnete kürzeste Verbindunglinie zwischen Getriebeeinheit und Antriebsmotor von einer Geraden abweicht. Es kann insbesondere eine kompakte Handwerkzeugmaschine und eine hohe Flexibilität einer Anordnung des Betätigungselements erreicht werden.A "connection drive train unit" is to be understood in particular a unit with at least one substantially rod-shaped connection drive train for power transmission, which is preferably rotatably mounted, which is connected at one end to the drive motor and driven by this and at another end with the Tool receiving unit is connected and transmits a force of the drive motor to this. In the direction of force flow from the drive motor to the tool receiving unit, a gear unit can be arranged in front of or behind the connecting drive train, this gear unit preferably being arranged between the connecting drive train and the tool receiving unit. The connection drive train unit transfers in particular forces from the drive motor to the gear unit to a drive of the tool receiving unit and / or to a drive of a recorded in the tool receiving unit insert tool. By "passed by" is to be understood in particular that, in particular due to a position of the at least one actuating element on the hand tool a path of power transmission from the drive motor to the tool holder unit longer fails as a way of power transmission in a hypothetical course of the connecting drive train unit by the position of the actuating element the hand tool, wherein the connection drive train in the hypothetical course of the connecting drive train unit by the position of the actuating element on the hand tool except for a passage through a possible Betätigungsfingerschutzraum in particular completely within the housing of the power tool. Preferably, the connecting drive train unit is at least partially separated from the actuating element by a housing of the handheld power tool. In particular, viewed in a machining direction of the drive motor is at least partially disposed in front of the actuating element, the gear unit arranged at least partially after the actuating element and preferably the actuating element is arranged completely in a region between the drive motor and actuator. Preferably, the connecting drive train unit runs at least substantially parallel to the central axis of the tool receiving unit and parallel to a longitudinal extent of an actuating finger guard space in which the actuating element is arranged. Preferably, gear unit and drive motor are arranged such that a arranged within the power tool machine shortest connecting line between the gear unit and drive motor deviates from a straight line. It can be achieved in particular a compact hand tool and a high flexibility of an arrangement of the actuating element.
Ferner wird ein Pistolengriff vorgeschlagen. Unter einem "Pistolengriff" soll insbesondere ein zumindest im Wesentlichen senkrecht von einem oberen Gehäusebauteil, das die Werkzeugaufnahmeeinheit aufweist, abstehender Handgriff zu einer einhändigen Führung der Handwerkzeugmaschine verstanden werden, wobei ein Benutzer mit einem oder mehreren Fingern einer Hand, mit der er den Pistolengriff zur Führung der Handwerkzeugmaschine umgreift, ein Betätigungselement der Akkuwerkzeugmaschine betätigen kann, ohne einen Griff um den Pistolengriff aufzugeben. Unter "zumindest im Wesentlichen senkrecht" soll insbesondere verstanden werden, dass ein Winkel zwischen Pistolengriff und oberem Gehäusebauteil maximal um zwanzig, vorteilhaft maximal um zehn und vorzugsweise maximal um ein Grad von 90 Grad abweicht. Insbesondere kann der Pistolengriff im Winkel von 90 Grad von dem oberen Gehäusebauteil abstehen. Es kann insbesondere eine vorteilhafte Griffergonomie erreicht werden.Furthermore, a pistol grip is proposed. A "pistol grip" is to be understood as meaning, in particular, a handle projecting at least substantially vertically from an upper housing component, which has the tool receiving unit, to a one-handed guidance of the handheld power tool, wherein a user with one or more fingers of a hand, with whom he grips the pistol grip Guiding the power tool engages around an actuator of the cordless machine tool can operate without giving up a grip on the pistol grip. By "at least substantially perpendicular" is to be understood in particular that an angle between Pistol grip and upper housing component by a maximum of twenty, advantageously deviates by a maximum of ten and preferably at most a degree of 90 degrees. In particular, the pistol grip may protrude at an angle of 90 degrees from the upper housing member. In particular, an advantageous grip ergonomics can be achieved.
Ferner wird vorgeschlagen, dass die Verbindungsantriebsstrangeinheit zumindest im Wesentlichen oberhalb des Betätigungselements verläuft. Darunter, dass die Verbindungsantriebsstrangeinheit "zumindest im Wesentlichen oberhalb des Betätigungselements verläuft" soll insbesondere verstanden werden, dass die Verbindungsantriebsstrangeinheit auf einer der Oberseite der Handwerkzeugmaschine zugewandten und dem Handgriff abgewandten Seite des Betätigungselements angeordnet ist und dass zumindest sechzig, vorteilhaft zumindest achtzig und vorzugsweise hundert Prozent einer Längsausdehnung der Verbindungsantriebsstrangeinheit in einem Bereich oberhalb einer Projektion des Betätigungselements in eine Richtung senkrecht zu einer Höhenrichtung des Betätigungselements angeordnet sind. Grundsätzlich kann die Verbindungsantriebsstrangeinheit auch unterhalb, links oder rechts von dem Betätigungselement vorbeigeführt sein. Es kann insbesondere eine kompakte Handwerkzeugmaschine erreicht werden.It is also proposed that the connecting drive train unit runs at least substantially above the actuating element. By the fact that the connecting drive train unit "extends at least substantially above the actuating element" should be understood in particular that the connecting drive train unit is arranged on a side facing away from the top of the power tool and the handle side of the actuating element and that at least sixty, preferably at least eighty and preferably one hundred percent a longitudinal extent of the connecting drive train unit are arranged in a region above a projection of the actuating element in a direction perpendicular to a height direction of the actuating element. In principle, the connecting drive train unit can also be guided below, to the left or to the right of the actuating element. In particular, a compact handheld power tool can be achieved.
Ferner wird eine Werkzeugaufnahmeeinheit mit einer Mittelachse, die zumindest durch einen Nahbereich des Betätigungselements verläuft, vorgeschlagen. Unter einer "Werkzeugaufnahmeeinheit" soll insbesondere eine Einheit der Handwerkzeugmaschine verstanden werden, die dazu vorgesehen ist, ein Einsatzwerkzeug, beispielsweise ein Bit eines Schraubers oder einen Bohrerbit aufzunehmen und zu befestigen. Insbesondere weist die Werkzeugaufnahmeeinheit hierzu einen vorteilhaft zumindest im Wesentlichen zylinderförmigen Aufnahmebereich für das Werkzeug auf. Die Werkzeugaufnahmeeinheit ist insbesondere an einem oberen Gehäuse einer Akkuwerkzeugmaschine angeordnet. Unter einer "Mittelachse der Werkzeugaufnahmeeinheit" soll insbesondere eine mittig durch den Aufnahmebereich für das Werkzeug in eine Orientierungsrichtung eines aufgenommenen Werkzeugs verlaufende, ins Unendliche erstreckte Gerade verstanden werden. Insbesondere entspricht die Mittelachse der Werkzeugaufnahmeeinheit einer Kraftwirklinie der Handwerkzeugmaschine. Unter einem "Nahbereich" soll insbesondere ein Bereich um das Betätigungselement verstanden werden, der durch einen Abstand von maximal 5 mm von dem Betätigungselement begrenzt ist. Durch die erfindungsgemäße Ausgestaltung der Handwerkzeugmaschine kann insbesondere eine verbesserte Führung einer Handwerkzeugmaschine und eine verbesserte Griffergonomie erreicht werden.Furthermore, a tool receiving unit with a central axis which extends at least through a vicinity of the actuating element is proposed. A "tool receiving unit" is to be understood in particular as a unit of the handheld power tool which is intended to receive and fasten an insert tool, for example a bit of a screwdriver or a drill bit. In particular, the tool receiving unit for this purpose has an advantageously at least substantially cylindrical receiving area for the tool. The tool receiving unit is arranged in particular on an upper housing of a cordless machine tool. A "center axis of the tool receiving unit" should in particular be understood to mean a straight line extending in the center through the receiving area for the tool in an orientation direction of a tool taken up. In particular, the central axis of the tool receiving unit corresponds to a force series of the hand tool. A "near zone" is to be understood in particular a region around the actuating element, which is limited by a distance of a maximum of 5 mm from the actuating element. Due to the inventive design of the power tool In particular, improved guidance of a handheld power tool and improved grip ergonomics can be achieved.
Ferner wird vorgeschlagen, dass die Mittelachse der Werkzeugaufnahmeeinheit durch das Betätigungselement verläuft. Es kann insbesondere eine verbesserte Führung einer Handwerkzeugmaschine und eine verbesserte Griffergonomie erreicht werden.It is also proposed that the central axis of the tool receiving unit extends through the actuating element. In particular, improved guidance of a handheld power tool and improved grip ergonomics can be achieved.
Ferner wird ein Betätigungsfingerschutzraum, innerhalb dem ein Betätigungselement angeordnet ist, vorgeschlagen. Unter einem "Betätigungsfingerschutzraum" soll insbesondere ein von zumindest drei Seiten von einem Gehäuse einer Akkuwerkzeugmaschine begrenzter Raum verstanden werden, der dazu vorgesehen ist, zumindest einen Finger eines Bedieners der Akkuwerkzeugmaschine aufzunehmen und zumindest einen Führungsbereich für den Finger während einer Betätigung des Betätigungselements zur Verfügung zu stellen sowie vorzugsweise den Finger zusätzlich vor eventuellen Verletzungen, insbesondere durch eventuell während einer Benutzung der Handwerkzeugmaschine umherfliegende Materialstücke oder ein Abrutschen der Handwerkzeugmaschine, zu schützen. Es kann insbesondere eine vorteilhafte Führung und ein Schutz des Fingers während einer Betätigung des Betätigungselements erreicht werden.Further, a Betätigungsfingerschutzraum, within which an actuating element is arranged, proposed. An "actuating finger protection space" is to be understood in particular as meaning a space bounded on at least three sides by a housing of a cordless power tool and intended to receive at least one finger of an operator of the cordless power tool and to provide at least one guidance area for the finger during actuation of the actuating element In addition, and preferably the finger in addition to any injuries, in particular by possibly during use of the power tool flying around pieces of material or slipping of the power tool to protect. In particular, advantageous guidance and protection of the finger during actuation of the actuating element can be achieved.
Ferner wird vorgeschlagen, dass der Betätigungsfingerschutzraum an zumindest vier Seiten geschlossen ausgebildet ist. Vorzugsweise ist der Betätigungsfingerschutzraum an einer Seite durch einen Verbindungssteg begrenzt und geschlossen. Insbesondere ist die durch den Verbindungssteg begrenzte Seite von einer in eine Ventralrichtung gelegenen Seite des Betätigungsfingerschutzraums gebildet. Unter einer "Ventralrichtung" soll insbesondere eine senkrecht zu der Mittelachse der Werkzeugaufnahmeeinheit verlaufende Richtung verstanden werden, entlang derer sich der Handgriff im Wesentlichen erstreckt. Es kann insbesondere eine vorteilhafte Führung des Fingers bei Anlage an das Betätigungselement erreicht werden.It is also proposed that the Betätigungsfingerschutzraum is formed closed at least four sides. Preferably, the Betätigungsfingerschutzraum is bounded on one side by a connecting web and closed. In particular, the side bounded by the connecting land is formed by a side of the actuating finger protecting space located in a ventral direction. A "ventral direction" is to be understood in particular as meaning a direction running perpendicular to the central axis of the tool receiving unit, along which the handle extends substantially. In particular, an advantageous guidance of the finger can be achieved when contacting the actuating element.
Ferner wird vorgeschlagen, dass der Betätigungsfingerschutzraum eine Höhenausdehnung von zumindest 2 cm aufweist. Unter einer "Höhenausdehnung" des Betätigungsfingerschutzraums soll insbesondere eine Ausdehnung des Betätigungsfingerschutzraums in eine zu einer Betätigungsrichtung des Betätigungselements senkrechte Richtung verstanden werden, in der bei einer Anlage eines Fingers an das Betätigungselement sich eine Fingerbreite erstreckt. Insbesondere weist der Betätigungsfingerschutzraum eine Höhenausdehnung auf, die eine Betätigung des Betätigungselements mit zwei Fingern erlaubt. Es kann insbesondere eine sichere Führung einer Handwerkzeugmaschine und eine sichere Betätigung des Betätigungselements erreicht werden.It is also proposed that the Betätigungsfingerschutzraum has a height extension of at least 2 cm. A "height extension" of the actuating finger protective space is to be understood in particular to mean an extension of the actuating finger protective space in a direction perpendicular to an actuating direction of the actuating element, in which a finger width extends when the finger touches the actuating element. In particular, the Betätigungsfingerschutzraum a height extent that allows actuation of the actuator with two fingers. In particular, a secure guidance of a handheld power tool and a secure operation of the actuating element can be achieved.
Ferner wird ein Handgriff vorgeschlagen, innerhalb dem der Antriebsmotor zumindest im Wesentlichen angeordnet ist. Unter "zumindest im Wesentlichen innerhalb des Handgriffs angeordnet" soll insbesondere verstanden werden, dass der Antriebsmotor zumindest mit siebzig, vorteilhaft zumindest mit neunzig und besonders vorzugsweise mit hundert Prozent seines Volumens innerhalb des Handgriffs liegt. Vorzugsweise ist der Handgriff von einem Pistolengriff gebildet. Durch die Anordnung des Antriebsmotors in dem Handgriff kann insbesondere eine verbesserte Führung einer Handwerkzeugmaschine und eine verbesserte Griffergonomie erreicht werden.Furthermore, a handle is proposed within which the drive motor is at least substantially arranged. By "arranged at least substantially within the handle" should be understood in particular that the drive motor is at least seventy, advantageously at least ninety, and more preferably one hundred percent of its volume within the handle. Preferably, the handle is formed by a pistol grip. The arrangement of the drive motor in the handle can be achieved in particular an improved leadership of a hand tool and improved grip ergonomics.
Ferner wird vorgeschlagen, dass der Antriebsmotor zumindest teilweise in einem von der Werkzeugaufnahmeeinheit gesehen hinter dem Betätigungselement gelegenen Bereich angeordnet ist. Insbesondere ist der Antriebsmotor zu einem Antrieb eines in der Werkzeugaufnahmeeinheit gelagerten Werkzeugs vorgesehen. Vorzugsweise ist der Antriebsmotor von einem Elektromotor und besonders vorzugsweise von einem bürstenlosen Gleichstrommotor (BLDC-Motor) gebildet, der insbesondere von einem Akku einer Akkuwerkzeugmaschine mit Strom versorgt wird. Darunter, dass der Antriebsmotor "zumindest teilweise in einem von der Werkzeugaufnahmeeinheit gesehen hinter dem Betätigungselement gelegenen Bereich angeordnet ist", soll insbesondere verstanden werden, dass der Antriebsmotor zumindest teilweise in einem Bereich der Handwerkzeugmaschine angeordnet ist, der auf einer parallel zu der Mittelachse verlaufenden und sich in einer der Werkzeugaufnahmeeinheit abgewandten Richtung erstreckenden Projektion des Betätigungselements liegt. Es kann insbesondere eine verbesserte Führung einer Handwerkzeugmaschine und eine verbesserte Griffergonomie erreicht werden.It is also proposed that the drive motor is arranged at least partially in a region located behind the actuating element, as viewed from the tool receiving unit. In particular, the drive motor is provided for driving a tool mounted in the tool receiving unit. Preferably, the drive motor is formed by an electric motor and particularly preferably by a brushless DC motor (BLDC motor), which is supplied in particular by a battery of a cordless power tool with power. The drive motor is arranged at least partially in a region of the handheld power tool which extends on a parallel to the central axis and is located in a direction away from the tool receiving unit direction projection of the actuating element. In particular, improved guidance of a handheld power tool and improved grip ergonomics can be achieved.
Ferner wird zumindest eine Umlenkgetriebeeinheit vorgeschlagen, die die Verbindungsantriebsstrangeinheit mit dem Antriebsmotor verbindet. Unter einer "Umlenkgetriebeeinheit" soll insbesondere eine Getriebeeinheit verstanden werden, die eine Drehbewegung zumindest in einer Richtung ändert. Insbesondere ist die Umlenkgetriebeeinheit dazu vorgesehen, einen in dem Handgriff angeordneten Antriebsmotor, der zumindest im Wesentlichen in einer Richtung senkrecht zu der Mittelachse der Werkzeugaufnahmeeinheit orientiert ist, mit einer zumindest im Wesentlichen parallel zu der Mittelachse verlaufenden Verbindungsantriebsstrangeinheit zu verbinden und eine Drehbewegung der Abtriebswelle des Antriebsmotors auf die Verbindungsantriebstrangeinheit zu übertragen. Es kann insbesondere konstruktiv einfach eine vorteilhaft platzsparende und ergonomische Positionierung des Antriebsmotors erreicht werden.Further, at least one Umlenkgetriebeeinheit is proposed, which connects the connecting drive train unit with the drive motor. A "deflection gear unit" is to be understood in particular as meaning a gear unit which changes a rotational movement at least in one direction. In particular, the deflection gear unit is provided to a arranged in the handle drive motor, at least substantially in a direction perpendicular to the central axis of the Tool receiving unit is oriented to connect to a at least substantially parallel to the central axis extending connecting drive train unit and to transmit a rotational movement of the output shaft of the drive motor to the connecting drive train unit. It can be achieved in particular structurally simple advantageous advantageous space-saving and ergonomic positioning of the drive motor.
Die erfindungsgemäße Handwerkzeugmaschine soll hierbei nicht auf die oben beschriebene Anwendung und Ausführungsform beschränkt sein. Insbesondere kann die erfindungsgemäße Handwerkzeugmaschine zu einer Erfüllung einer hierin beschriebenen Funktionsweise eine von einer hierin genannten Anzahl von einzelnen Elementen, Bauteilen und Einheiten abweichende Anzahl aufweisen.The hand tool according to the invention should not be limited to the application and embodiment described above. In particular, the handheld power tool according to the invention may have a different number from a number of individual elements, components and units mentioned herein for performing a function described herein.
Weitere Vorteile ergeben sich aus der folgenden Zeichnungsbeschreibung. In der Zeichnung sind sechs Ausführungsbeispiele der Erfindung dargestellt. Die Zeichnung, die Beschreibung und die Ansprüche enthalten zahlreiche Merkmale in Kombination. Der Fachmann wird die Merkmale zweckmäßigerweise auch einzeln betrachten und zu sinnvollen weiteren Kombinationen zusammenfassen.Further advantages emerge from the following description of the drawing. In the drawing, six embodiments of the invention are shown. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.
Es zeigen:
- Fig. 1
- eine erfindungsgemäße, als Akkuwerkzeugmaschine ausgebildete Handwerkzeugmaschine in einer Pistolenform,
- Fig. 2
- eine alternative Ausbildung einer Handwerkzeugmaschine mit einem Griffschutz für den Handgriff,
- Fig. 3
- eine alternative Ausbildung einer Handwerkzeugmaschine mit einem in einem Handgriff angeordneten Antriebsmotor mit einem internen Lüfter,
- Fig. 4
- eine weitere alternative Ausbildung einer Handwerkzeugmaschine mit einem in einem Handgriff angeordneten Antriebsmotor mit einem internen Lüfter,
- Fig. 5
- eine weitere alternative Ausbildung einer Handwerkzeugmaschine mit einem in einem Handgriff angeordneten Antriebsmotor mit einem internen Lüfter und
- Fig. 6
- eine alternative Ausbildung einer Handwerkzeugmaschine mit einem in einem Handgriff angeordneten Antriebsmotor mit einem externen Lüfter.
- Fig. 1
- an inventive, designed as a cordless machine tool hand tool in a pistol shape,
- Fig. 2
- an alternative embodiment of a hand tool with a grip protection for the handle,
- Fig. 3
- an alternative embodiment of a hand tool with a arranged in a handle drive motor with an internal fan,
- Fig. 4
- a further alternative embodiment of a hand tool with a drive motor arranged in a handle with an internal fan,
- Fig. 5
- a further alternative embodiment of a power tool with a arranged in a handle drive motor with an internal fan and
- Fig. 6
- an alternative embodiment of a power tool with a arranged in a handle drive motor with an external fan.
Eine Mittelachse 16a der Werkzeugaufnahmeeinheit 14a verläuft durch das Betätigungselement 20a und somit durch einen Nahbereich des Betätigungselements 20a. In alternativen Ausgestaltungen der Akkuwerkzeugmaschine 10a kann die Mittelachse 16a der Werkzeugaufnahmeeinheit 14a auch beispielsweise in einem Abstand von 5 mm oberhalb eines oberen Endes des Betätigungselements 20a oder in einem geringeren Abstand davon verlaufen. Die Mittelachse 16a der Werkzeugaufnahmeeinheit 14a weist einen Abstand von einem Mittelpunkt des Betätigungselements 20a auf und zwei Drittel einer Längsausdehnung des Betätigungselements 20a erstrecken sich auf einer dem Handgriff 38a zugewandten Seite der Mittelachse 16a, die in einem normalen Betrieb dem Boden zugewandt ist. Das Betätigungselement 20a erstreckt sich somit größtenteils auf einer dem Handgriff 38a zugewandten Seite der Mittelachse 16a, die in einem normalen Betrieb dem Boden zugewandt ist. Aufgrund eines solchen Verlaufs der Mittelachse 16a kann eine vorteilhafte Ergonomie bei einer Betätigung des Betätigungselements 20a und einer Führung der Akkuwerkzeugmaschine 10a erreicht werden, da eine Kraftwirklinie der Akkuwerkzeugmaschine 10a, die entlang der Mittelachse 16a der Werkzeugaufnahmeeinheit 14a verläuft, durch eine Hand eines Benutzers und unterhalb zumindest eines Betätigungsfingers des Benutzers verläuft, wodurch unerwünschte Drehmomente auf die Hand vermieden werden können.A
Die Akkuwerkzeugmaschine 10a weist einen Betätigungsfingerschutzraum 22a auf, in dem das Betätigungselement 20a angeordnet ist. Die Mittelachse 16a der Werkzeugaufnahmeeinheit 14a verläuft somit auch durch den Betätigungsfingerschutzraum 22a. Der Betätigungsfingerschutzraum 22a ist an einer parallel zu der Mittelachse 16a verlaufenden, dem Handgriff 38a zugewandten Seite geschlossen ausgebildet und dort durch einen Verbindungssteg 24a zwischen zwei Teilbereichen des oberen Gehäusebauteils 34a geschlossen. Der Verbindungssteg 24a ist auf einer in einem normalen Betriebszustand dem Boden zugewandten Seite der Mittelachse 16a der Werkzeugaufnahmeeinheit 14a angeordnet und bietet eine Anlagefläche für einen Betätigungsfinger des Benutzers sowie Schutz vor eventuellen scharfen Kanten oder Splittern einer Umgebung. Der Betätigungsfingerschutzraum 22a weist eine Höhenausdehnung von 5 cm auf, wodurch eine Betätigung des Betätigungselements 20a mittels zweier Finger möglich ist. Die Höhenausdehnung ist von einer senkrecht zu einer Längsausdehnung des Betätigungsfingerschutzraums 22a und im Wesentlichen senkrecht zu der Mittelachse 16a der Werkzeugaufnahmeeinheit 14a verlaufenden Ausdehnung des Betätigungsfingerschutzraums 22a gebildet, die in einem normalen Betriebszustand der Akkuwerkzeugmaschine 10a parallel zu einer Flächennormalen des Bodens verläuft. Grundsätzlich kann der Betätigungsfingerschutzraum 22a in alternativen Ausgestaltungen eine geringere Höhenausdehnung aufweisen, so dass das Betätigungselement 20a lediglich mit einem Betätigungsfinger betätigt werden kann. Die Akkuwerkzeugmaschine 10a umfasst einen Antriebsmotor 26a, der zumindest teilweise in einem von der Werkzeugaufnahmeeinheit 14a gesehen hinter dem Betätigungselement 20a gelegenen Bereich angeordnet ist. Bei einer Projektion des Betätigungselements 20a entlang einer von der Werkzeugaufnahmeeinheit 14a wegführenden, parallel zu der Mittelachse 16a verlaufenden Richtung, so liegt in etwa eine Hälfte des Antriebsmotors 26a innerhalb eines von der Projektion geschnittenen Bereichs, eine weitere Hälfte erstreckt sich in Richtung des Handgriffs 38a nach unten, in einem normalen Betriebszustand einem Boden zugewandt. Der Antriebsmotor 26a ist innerhalb des Handgriffs 38a angeordnet. Die Mittelachse 16a der Werkzeugaufnahmeeinheit 14a verläuft durch den Antriebsmotor 26a und durchläuft diesen in einem oberen, einer Oberseite der Akkuwerkzeugmaschine 10a zugewandten Bereich. Die Oberseite der Akkuwerkzeugmaschine 10a ist dem Handgriff 38a gegenüberliegend und von dem Handgriff 38a abgewandt angeordnet. Eine Motorachse 28a des Antriebsmotors 26a schließt einen Winkel von 70 Grad mit der Mittelachse 16a der Werkzeugaufnahmeeinheit 14a ein.The
Die Akkuwerkzeugmaschine 10a weist ferner eine Verbindungsantriebsstrangeinheit 30a zur Kraftübertragung von dem Antriebsmotor 26a auf die Werkzeugaufnahmeeinheit 14a auf, die zumindest im Wesentlichen seitlich des Betätigungsfingerschutzraums 22a verläuft. Die Verbindungsantriebsstrangeinheit 30a weist einen drehbar gelagerten Verbindungsantriebsstrang auf, der an einem Ende mit einem Getriebe verbunden ist und an einem weiteren Ende eine Umlaufscheibe mit einer abgeschrägten Fläche aufweist, die mit einer analog ausgebildeten Umlaufscheibe mit abgeschrägter Fläche einer Abtriebswelle des Antriebsmotors 26a kämmt. Die Umlaufscheiben bilden eine Umlenkgetriebeeinheit 32a der Akkuwerkzeugmaschine 10a, die die Verbindungsantriebsstrangeinheit 30a mit dem Antriebsmotor 26a verbindet. Eine Getriebeeinheit 18a verbindet die Verbindungsantriebsstrangeinheit 30a mit der Werkzeugaufnahmeeinheit 14a und ist zu einer Anpassung einer Drehgeschwindigkeit der Abtriebswelle des Antriebsmotors 26a auf eine vorgesehene Drehgeschwindigkeit der Werkzeugaufnahmeeinheit 14a mittels einer konstanten und/oder einer variablen Übersetzung vorgesehen. Die Getriebeeinheit 18a kann beispielsweise als ein Planetengetriebe ausgebildet sein, wobei die Verbindungsantriebsstrangeinheit 30a beispielsweise ein Sonnen- oder Planetenrad, ein Hohlrad oder einen Planetenträger antreiben. Die Akkuwerkzeugmaschine 10a kann in alternativen Ausgestaltungen beispielsweise als Akkuschlagschraubmaschine oder als Akkuschlagbohrmaschine ausgebildet sein und die Getriebeeinheit 18a hierzu beispielsweise anstatt oder zusätzlich zu einem Schraubergetriebe ein Getriebe mit einem Schlagschraubmechanismus, ein Getriebe mit einer Rastenscheibe für ein Schlagbohren oder ein Getriebe mit einem Hammermechanismus umfassen.The
In den
Die alternative Ausführung einer Akkuwerkzeugmaschine 10b in
In einer weiteren alternativen Ausführung (
Eine weitere alternative Ausführung (
In einer weiteren alternativen Ausführung (
Claims (11)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012221758.4A DE102012221758A1 (en) | 2012-11-28 | 2012-11-28 | Hand tool |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2745994A2 true EP2745994A2 (en) | 2014-06-25 |
EP2745994A3 EP2745994A3 (en) | 2014-08-20 |
EP2745994B1 EP2745994B1 (en) | 2016-05-18 |
Family
ID=49274447
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13186281.5A Not-in-force EP2745994B1 (en) | 2012-11-28 | 2013-09-27 | Manually held power tool |
Country Status (4)
Country | Link |
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US (1) | US9782883B2 (en) |
EP (1) | EP2745994B1 (en) |
CN (1) | CN103846852B (en) |
DE (1) | DE102012221758A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3501755A1 (en) * | 2017-12-21 | 2019-06-26 | Guido Valentini | Electric machine comprising an electric motor and a gear arrangement and electric power tool comprising such a machine |
EP3501753A1 (en) * | 2017-12-21 | 2019-06-26 | Guido Valentini | Hand guided and/or hand held electric or pneumatic power tool |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102012221748A1 (en) * | 2012-11-28 | 2014-05-28 | Robert Bosch Gmbh | Hand tool |
JP6325360B2 (en) * | 2014-06-12 | 2018-05-16 | 株式会社マキタ | Impact tool |
CN105619342B (en) * | 2014-10-28 | 2018-01-19 | 南京德朔实业有限公司 | Electric tool |
EP3566176A4 (en) * | 2017-01-04 | 2020-10-14 | Interlink Electronics, Inc. | Multi-modal sensing for power tool user interface |
DE202019103088U1 (en) * | 2019-05-29 | 2020-09-01 | Robert Bosch Gmbh | Hand machine tool |
US11437900B2 (en) | 2019-12-19 | 2022-09-06 | Black & Decker Inc. | Modular outer-rotor brushless motor for a power tool |
US11757330B2 (en) | 2019-12-19 | 2023-09-12 | Black & Decker, Inc. | Canned outer-rotor brushless motor for a power tool |
WO2022166803A1 (en) * | 2021-02-04 | 2022-08-11 | 南京泉峰科技有限公司 | Electric screwdriver |
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DE4116343A1 (en) * | 1991-05-18 | 1992-11-19 | Bosch Gmbh Robert | HAND-MADE ELECTRIC TOOL, ESPECIALLY DRILLING MACHINE |
DE4208804A1 (en) * | 1992-03-19 | 1993-09-23 | Festo Kg | PISTOL-DESIGNED ELECTRIC TOOL |
US6315060B1 (en) * | 1999-08-13 | 2001-11-13 | Wilton Tool Company, Llc | Collet assembly for power tools |
US6244358B1 (en) * | 2000-01-13 | 2001-06-12 | Snap-On Technologies, Inc. | Trigger and clutch arrangement for power tools |
DE20111644U1 (en) * | 2001-07-13 | 2001-10-18 | Paulke Gabor | Drilling machine for mains and battery operation |
CN2691797Y (en) | 2004-03-30 | 2005-04-13 | 苏州宝时得电动工具有限公司 | Electric tool |
CN101224571B (en) | 2007-01-19 | 2013-07-31 | 苏州宝时得电动工具有限公司 | Hand-held electric tool |
DE102010063069A1 (en) * | 2010-12-14 | 2012-06-14 | Robert Bosch Gmbh | Hand tool, in particular drill or Schraubbohrmaschine |
US9038745B2 (en) * | 2010-12-20 | 2015-05-26 | Brigham Young University | Hand power tool and drive train |
JP5770549B2 (en) * | 2011-07-01 | 2015-08-26 | 株式会社マキタ | Impact tool |
-
2012
- 2012-11-28 DE DE102012221758.4A patent/DE102012221758A1/en not_active Withdrawn
-
2013
- 2013-09-27 EP EP13186281.5A patent/EP2745994B1/en not_active Not-in-force
- 2013-11-11 US US14/076,347 patent/US9782883B2/en active Active
- 2013-11-28 CN CN201310625436.5A patent/CN103846852B/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
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None |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3501755A1 (en) * | 2017-12-21 | 2019-06-26 | Guido Valentini | Electric machine comprising an electric motor and a gear arrangement and electric power tool comprising such a machine |
EP3501753A1 (en) * | 2017-12-21 | 2019-06-26 | Guido Valentini | Hand guided and/or hand held electric or pneumatic power tool |
US10804788B2 (en) | 2017-12-21 | 2020-10-13 | Guido Valentini | Electric machine having electric motor and gear arrangement, and electric power tool having such an electric machine |
US11325238B2 (en) | 2017-12-21 | 2022-05-10 | Guido Valentini | Hand guided and/or hand held electric or pneumatic power tool |
Also Published As
Publication number | Publication date |
---|---|
EP2745994B1 (en) | 2016-05-18 |
CN103846852B (en) | 2017-09-29 |
EP2745994A3 (en) | 2014-08-20 |
CN103846852A (en) | 2014-06-11 |
US9782883B2 (en) | 2017-10-10 |
US20140144664A1 (en) | 2014-05-29 |
DE102012221758A1 (en) | 2014-05-28 |
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