EP3639979B1 - Machine-outil manuelle - Google Patents

Machine-outil manuelle Download PDF

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Publication number
EP3639979B1
EP3639979B1 EP19199466.4A EP19199466A EP3639979B1 EP 3639979 B1 EP3639979 B1 EP 3639979B1 EP 19199466 A EP19199466 A EP 19199466A EP 3639979 B1 EP3639979 B1 EP 3639979B1
Authority
EP
European Patent Office
Prior art keywords
hand
power tool
air guiding
held power
unit
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
EP19199466.4A
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German (de)
English (en)
Other versions
EP3639979A1 (fr
Inventor
Thomas Hampel
Zoltan Varga
Dennis Garcia-Franco
Eva Stoll
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3639979A1 publication Critical patent/EP3639979A1/fr
Application granted granted Critical
Publication of EP3639979B1 publication Critical patent/EP3639979B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02—Construction of casings, bodies or handles
    • 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 present invention relates to a hand-held power tool, in particular a screwdriver, with a hand-held power tool housing, in particular a screwdriver housing, with at least two housing elements which at least partially enclose a drive unit of the hand-held power tool, in particular the screwdriver, with at least one tool housing axis and with at least one air guiding unit for guiding a Airflow to cool at least the drive unit.
  • a battery housing with at least two housing parts, which at least partially enclose a housing interior, and with a ventilation duct for an air exchange between the housing interior and the environment.
  • the EP 2 535 150 A2 discloses an impact wrench having a housing.
  • EP 2 433 758 A2 discloses a rechargeable electrical device having a housing, the housing having openings.
  • the JP 2010 036260 A describes an impact wrench with a housing.
  • EP 2 561 963 A2 describes a power tool with a housing and a motor housing.
  • the EP 2 716 412 A2 describes a power tool with a housing having left and right housing halves.
  • the present invention is based on a handheld power tool, in particular a screwdriver, with a handheld power tool housing, in particular a screwdriver housing, with at least two housing elements which at least partially enclose a drive unit of the handheld power tool, in particular the screwdriver, with at least one tool housing axis and with at least one air guiding unit Conduction of an air flow for cooling at least the drive unit.
  • the air guiding unit is arranged transversely to the axis of the tool housing, as presented in claim 1.
  • the invention provides a hand-held power tool, in particular a screwdriver, with which the stability of the drive unit of the hand-held power tool can be increased by arranging the air-guiding unit transversely to the axis of the tool housing for optimal guidance of the air flow for cooling at least the drive unit.
  • the hand-held power tool housing is at least one housing of the hand-held power tool, in particular the screwdriver, which is at least designed to at least partially accommodate the drive unit.
  • the hand-held power tool housing can also be provided to at least partially accommodate a tool holder, a control unit and/or an energy supply unit.
  • the hand-held power tool housing comprises at least two housing elements.
  • the housing elements can be connected to one another, with the connection taking place in particular via a non-positive and/or positive connection.
  • the housing elements at least partially form an outer surface of the hand-held power tool housing.
  • the housing elements can be designed, for example, as housing half-shell parts, as a front shell part, as a cover shell part, etc. It is also conceivable that the handheld power tool housing includes more than two housing elements.
  • a “handheld power tool” is to be understood in particular as a handheld machine, preferably a battery-powered handheld power tool.
  • the hand-held power tool can be a screwdriver, a drill/screwdriver, an impact wrench, an impact wrench, a drywall screwdriver, an angle drill or a hammer drill.
  • a mains-operated handheld power tool is also conceivable.
  • the drive unit of the hand-held power tool also has a gear unit.
  • the gear unit is designed to adapt, in particular to reduce and/or increase, a speed of the drive motor.
  • the gear unit can be designed as a planetary gear, it also being conceivable for the planetary gear to be shiftable.
  • the drive motor of the hand-held power tool is designed to generate a torque to drive a main output shaft to provide.
  • the main output shaft preferably runs essentially parallel to a main working direction of the hand-held power tool.
  • the main output shaft of the drive unit represents the axis of the tool housing.
  • the main output shaft can have a tool holder for receiving an insert tool.
  • the tool holder can be designed as an inner holder, in particular a polygonal inner holder, in particular a hexagonal inner holder. It is also conceivable that the tool holder of the main output shaft is designed as an external holder.
  • the tool holder of the main output shaft is an output of a main output train of the handheld power tool and is provided for transmitting a torque and/or a rotary movement to the insert tool.
  • the hand-held power tool in particular the screwdriver, includes the energy supply unit for supplying energy to the drive unit, in particular to the drive motor.
  • the hand-held power tool is preferably a battery-operated hand-held power tool which can be operated using at least one rechargeable battery, in particular using a hand-held power tool battery pack.
  • the energy is then provided by the energy supply unit by means of the at least one rechargeable battery.
  • a “handheld power tool battery pack” should be understood to mean a combination of at least one battery cell and a battery pack housing.
  • the hand tool battery pack is advantageously designed to supply energy to commercially available battery-powered hand tools.
  • the at least one battery cell can be designed as a Li-ion battery cell with a nominal voltage of 3.6 V, for example.
  • the at least one rechargeable battery is arranged fixed to the housing essentially within the hand-held power tool housing, in particular attached, in particular mounted.
  • the at least one battery it is also possible for the at least one battery to be designed as a replaceable battery, in particular as a replaceable hand-held power tool battery pack.
  • the hand-held power tool can be a mains-operated hand-held power tool, which can be connected to an external mains socket by means of a power supply cable.
  • the external mains socket can be used provide a voltage of, for example, 100 V, 110 V, 120 V, 127 V, 220 V, 230 V or 240 V with 50 Hz or 60 Hz, but also a three-phase AC voltage.
  • the possible configurations of the external mains socket and the associated available voltages are well known to those skilled in the art.
  • the present invention is not limited to the type of power supply unit.
  • the control unit of the handheld power tool is intended to control the drive unit, in particular the drive motor.
  • the control unit receives signals from an actuating unit.
  • the actuation unit is designed to be actuated by a user and to convert a mechanical actuation into a signal, in particular an electrical signal.
  • the actuation unit then transmits the signal to the control unit.
  • the control unit receives this signal, processes it and controls and/or regulates the drive unit on the basis of the signal from the actuating unit.
  • the hand-held power tool housing includes the air guiding unit for conducting the air flow for cooling at least the drive unit.
  • the air guiding unit can be designed in one piece with the hand-held power tool housing.
  • the air guiding unit is arranged transversely to the tool housing axis in order to enable an air flow optimized for cooling essentially within the hand-held power tool, in particular the screwdriver housing.
  • the air guiding unit is essentially ring-shaped, in particular c-shaped, with the air guiding unit being essentially in the circumferential direction of the tool housing axis.
  • substantially ring-shaped should also be understood as being essentially elliptical.
  • "essentially in the circumferential direction” should be understood as essentially having a fixed radius to the tool housing axis.
  • the air guiding unit it is also conceivable for the air guiding unit to have a polygonal design, for example in the manner of a polygonal jacket.
  • the air guiding unit encloses an angle in the range from 60° to 90°, in particular in the range from 65° to 85°, very particularly in the range from 70° to 80°, to the axis of the tool housing.
  • An angular arrangement of the air-guiding unit in relation to the tool housing axis enables optimized guidance of the air flow within the hand-held power tool housing for cooling the drive unit, in particular the drive motor.
  • the air guiding unit and an actuating element of the actuating unit form a connecting line, the connecting line forming an angle in the range from 60° to 90°, in particular in the range from 65° to 85°, very particularly in the range from 70° to 80°. to the tool body axis.
  • the actuation unit includes the actuation element.
  • the actuating element is movably mounted and is intended to be actuated by the user in order to control and/or regulate the hand-held power tool, in particular the drive unit.
  • the actuating element has at least one actuating surface, with the user being able to place at least one finger on the actuating surface to actuate the actuating element.
  • the connecting line forms the angle in the range from 60° to 90°, in particular in the range from 65° to 85°, very particularly in the range from 70° to 80°, to the tool housing axis, which results in optimal cooling of the drive unit, in particular the drive motor , Is made possible, regardless of the positioning of the at least one finger of the user.
  • the air guiding unit has at least one ventilation opening for guiding the air flow for cooling at least the drive unit.
  • the ventilation opening enables heated air to be discharged from the hand-held power tool housing, with the air being heated as a result of operation of the drive unit. Furthermore, the heated air is conducted essentially in the radial direction to the tool housing axis through the ventilation opening out of the hand-held power tool housing.
  • the ventilation opening serves to supply fresh air to the hand-held power tool housing.
  • the fresh air is directed to the drive unit essentially in a radial direction to the axis of the tool housing. during operation the drive unit, the fresh air can be used again to cool the drive unit.
  • the ventilation opening is formed essentially in the circumferential direction to the tool housing axis and has an opening angle to the tool housing axis in the range from 5° to 80°, in particular in the range from 25° to 75°, very particularly in the range from 35° to 60° . This allows for a compact hand-held power tool while at the same time optimally guiding the air flow for cooling the drive unit.
  • the ventilation opening is arranged in the area of the drive motor of the drive unit. This makes it possible for the heated air to be routed out of the hand-held power tool housing directly via the ventilation opening due to the operation of the drive motor. It is also conceivable for the ventilation opening to be arranged in the area of the control unit or in the area of the energy supply unit in order to direct the heated air out of the hand-held power tool housing via the ventilation opening.
  • the air guiding unit comprises at least one additional ventilation opening.
  • the ventilation opening is designed as an airflow inlet channel and the further ventilation opening as an airflow outlet channel.
  • the ventilation opening it is possible for the ventilation opening to be provided as the air outlet duct and for the further ventilation opening to be provided as the air inlet duct.
  • the ventilation opening and the further ventilation opening it is possible for the ventilation opening and the further ventilation opening to be designed as an air inlet duct or as an air outlet duct.
  • the air flow inlet duct is designed to conduct the fresh air essentially in the radial direction to the tool housing axis into the hand-held power tool housing and thereby provide the fresh air for the drive unit, in particular the drive motor.
  • the air flow outlet channel is designed to guide the heated air out of the hand-held power tool housing essentially in the radial direction.
  • the air flow inlet duct and the air flow outlet duct therefore enable optimal air flow for cooling the drive unit, in particular the drive motor. during operation of the drive unit.
  • the optimal air flow for cooling the drive unit increases the stability of the drive unit.
  • the ventilation opening and the further ventilation opening are arranged essentially radially opposite to the axis of the tool housing. Efficient conduction of the air flow for cooling the drive unit is made possible by means of the essentially radially opposite arrangement of the ventilation opening and the further ventilation opening to the tool housing axis. It is also conceivable that the ventilation opening and the further ventilation opening form an angle in the range of 20° to 100°, in particular 30° to 90°, very particularly 40° to 70° to one another in relation to the tool housing axis.
  • the ventilation opening and/or the further ventilation opening is essentially trapezoidal. This enables the air flow to be guided with little turbulence into the ventilation opening and out of the further ventilation opening.
  • the ventilation opening and/or the further ventilation opening is essentially circular, elliptical, polygonal, in particular square or rectangular.
  • the air guiding unit comprises at least one air guiding element, wherein the air guiding element is formed essentially as a wedge-shaped groove arranged in the circumferential direction.
  • the air guiding element is formed on the outer surface of the hand-held power tool housing.
  • the air guide element also enables a continuous supply of fresh air to the ventilation opening.
  • the air guiding element is designed on the hand-held power tool housing in such a way that the continuous supply of fresh air to the ventilation opening is also made possible when the user covers the ventilation opening with at least one finger. This ensures that fresh air is continuously fed to the drive unit.
  • the air guiding element enables a continuous discharge of warm air from the further ventilation opening.
  • the hot air discharge from the handheld power tool housing via the additional ventilation opening is also guaranteed if the user covers the additional ventilation opening with at least one finger. This ensures that the heated air is continuously discharged from the drive unit. This provides continuous cooling during operation of the drive unit.
  • the air guiding unit has at least one second air guiding element, wherein the second air guiding element is essentially designed as an at least partially circumferential wedge-shaped projection.
  • the second air guiding element is formed on an inner surface of the hand-held power tool housing.
  • the second air guiding element can be ring-shaped, in particular c-shaped, on the inner surface of the hand-held power tool housing.
  • the second air guiding element enables the air flow, in particular the fresh air, to be guided via the ventilation opening to the drive unit, in particular to the drive motor.
  • the second air guiding unit enables the air flow, in particular the heated air, to be guided away from the drive unit, in particular the drive motor, via the further ventilation opening.
  • the second air guiding element as the at least partially circumferential wedge-shaped projection, provides low-turbulence guidance of the air flow in the hand-held power tool housing. Furthermore, the second air guiding element can be provided to direct the heated air from the control unit and/or the energy supply unit.
  • the second air guiding element forms the ventilation opening and the further ventilation opening.
  • the ventilation opening, the further ventilation opening, the air guiding element and the second air guiding element are formed in one piece. This provides a compact and, at the same time, cooling-optimized handheld power tool.
  • the air guiding unit is formed in one piece with the handheld power tool housing and is essentially C-shaped in the circumferential direction of the tool housing axis.
  • the air guiding unit and the actuating element form the connecting line, which encloses the angle in the range of 70° to 80° to the axis of the tool housing.
  • the handheld power tool housing forms the air guiding element as the wedge-shaped groove, which is arranged in the circumferential direction.
  • the second air guiding element is designed as the at least partially circumferential wedge-shaped projection.
  • the ventilation opening and the other ventilation opening in the wedge-shaped groove and the at least partially circumferential wedge-shaped projection formed as recesses.
  • a plurality of ventilation openings and/or a plurality of further ventilation openings are provided.
  • the plurality of ventilation openings and/or further ventilation openings are formed essentially in the circumferential direction of the tool housing axis.
  • the handheld power tool 100 is designed as a battery-powered handheld power tool 100, here by way of example as a battery-powered screwdriver. It is pointed out that the present invention is not limited to battery-powered screwdrivers. The present invention can also find application in different handheld power tools that have a handheld power tool housing 110 . In addition, the present invention can be used not only in mains-independent handheld power tools that are operated via a battery, i.e. cordless handheld power tools, but also in mains-operated handheld power tools, i.e. mains-powered handheld power tools, and/or in non-electrically operated handheld power tools.
  • the hand-held power tool 100 illustratively has a drive unit 120 and a main output shaft 126 with a tool holder 128 .
  • the main output shaft 126 of the drive unit 120 represents the tool housing axis 112.
  • the handheld power tool housing 110 illustratively includes the drive unit 120.
  • the drive unit 120 also includes a drive motor 121 and a transmission unit 122.
  • the transmission unit 122 can be designed as at least one switchable planetary gear.
  • the gear unit 122 is connected to the drive motor 121 via a motor shaft 123 .
  • the gear unit 122 is provided to convert a rotation of the motor shaft 123 into a rotation between the gear unit 122 and the tool holder 128 via the main output shaft 126 .
  • the drive motor 121 and the gear unit 122 are arranged directly in the hand-held power tool housing 110 in the manner of an “open frame” design.
  • the drive motor 121 is designed as an electronically commutated motor.
  • the drive motor 121 can be controlled and/or regulated electronically, so that reverse operation and a desired rotational speed can be implemented.
  • the tool holder 128 is preferably formed and/or formed on the main output shaft 126 .
  • the tool holder 128 is designed here as a hexagonal socket, in the manner of a bit holder, which is intended to hold an insert tool.
  • the application tool is shaped like a screwdriver bit with a polygonal outer clutch.
  • the type of screwdriver bit for example the HEX type, is well known to those skilled in the art.
  • the present invention is not limited to the use of HEX screwdriver bits, but other tool holders that appear sensible to those skilled in the art can also be used, such as HEX drill bits or SDS-Quick insert tools.
  • the structure and the mode of operation of a suitable bit holder are well known to those skilled in the art.
  • Hand-held power tool 100 also has an energy supply unit 140 for supplying energy to drive unit 120 .
  • the energy supply unit 140 comprises at least one rechargeable battery for driving the drive unit 120.
  • the energy is therefore provided by the at least one energy supply unit 140 by means of the at least one rechargeable battery.
  • the at least one rechargeable battery is arranged fixed to the housing essentially within hand-held power tool housing 110 of hand-held power tool 100 .
  • the hand-held power tool 100 has a charging unit that is not shown in detail. This charging unit can be connected to a power grid and is designed to charge the energy supply unit 140 .
  • the hand-held power tool housing 110 accommodates at least the drive unit 120, a control unit 150, the main output shaft 126 and the energy supply unit 140.
  • Control unit 150 of the hand-held power tool controls and/or regulates drive unit 120.
  • Control unit 150 is designed to receive signals from an actuating unit 160.
  • the actuation unit 160 can be actuated by a user, thereby converting a mechanical actuation into a signal.
  • the actuation unit 160 has an actuation element 162 .
  • the actuating element 162 is movably mounted.
  • the actuating element can be actuated by the user to control and/or regulate the drive unit 120.
  • the actuating element 162 also includes an actuating surface 164 on which the user can place at least one finger to actuate the actuating element 162.
  • the control unit 150 processes the received signal and processes it further, as a result of which the drive unit 120 is controlled and/or regulated.
  • the hand-held power tool housing 110 supports the drive unit 120 in an assembled state and therefore protects the drive unit 120 from environmental influences such as dust, moisture, radiation and/or impacts.
  • the handheld power tool housing 110 is designed in the shape of a pistol, it also being conceivable for the handheld power tool housing 110 to be designed in a T-shape.
  • the hand tool housing 110 includes a handle 111.
  • the handle 111 is to designed to be gripped by one of the user's hands to use the hand-held power tool 100 .
  • the hand-held power tool 100 is designed to be held by hand for use.
  • the hand-held power tool housing 110 has two housing elements 113, see also 3 .
  • the housing elements 113 can be connected to one another in a form-fitting manner and are screwed together using screws that are not shown, see also FIG 3 .
  • the housing elements 113 form an outer surface 114 of the hand-held power tool housing 110 .
  • the housing elements 113 form an inner surface 115 of the hand-held power tool housing 110, see FIG 3 .
  • the hand-held power tool housing 110 comprises the tool housing axis 112 and an air guiding unit 130 which, according to the invention, is arranged transversely to the tool housing axis 112 .
  • the air guiding unit 130 is essentially ring-shaped and shaped essentially in the circumferential direction 105 to the tool housing axis 112 .
  • the air guiding unit 130 conducts an air flow for cooling at least the drive unit 120.
  • the air guiding unit encloses an angle 106 in the range of 60° to 90° to the tool housing axis 112.
  • the air-guiding unit 130 includes a ventilation opening 132 for guiding the air flow for cooling at least the drive unit 120.
  • the ventilation opening 132 is shaped in such a way that it enables heated air to be discharged from the hand-held power tool housing 110.
  • the ventilation opening 132 is also designed to supply fresh air into the hand-held power tool housing 110 .
  • the ventilation opening 132 is formed essentially in the circumferential direction 105 to the tool housing axis 112 and has an opening angle 133 to the tool housing axis 112 in the range of 5° to 80°, see here 2 .
  • the ventilation opening 132 is arranged in the area of the drive motor 121 of the drive unit 120 .
  • the ventilation opening 132 is essentially trapezoidal in shape, although other shapes such as circular, elliptical or polygonal are also conceivable.
  • the air guiding unit 132 also has an air guiding element 136 .
  • the air guiding element 136 is formed essentially as a wedge-shaped groove arranged in the circumferential direction 105 .
  • the air guiding element 136 is formed on the outer surface 114 of the hand-held power tool housing 110 .
  • the air guiding element 136 enables a continuous supply of fresh air to the ventilation opening 132.
  • the air guiding element 132 provides a continuous discharge of warm air from the ventilation opening 132.
  • FIG. 2 shows a section 300 of the hand-held power tool housing 110 according to the invention of the hand-held power tool 100 with the air guiding unit 130.
  • the opening angle 133 of the ventilation opening 132 is also shown here.
  • the air guiding unit 130 and the actuating element 162 of the hand-held power tool housing 110 form a connecting line 107 (see also in this regard). 2 .
  • the connecting line 107 encloses an angle 108 in the range from 60° to 90° to the tool housing axis 112 .
  • the actuating element 162 forms the connecting line 107 when the actuating element 162 is in a non-actuated state.
  • the connecting line 107 encloses the angle 108 in the range from 60° to 90° with the tool housing axis 112 .
  • FIG. 12 shows two sections through the handheld power tool housing 110 along the tool housing axis 112.
  • the air guiding unit 130 has a further ventilation opening 134.
  • the ventilation opening 132 represents an airflow inlet channel and the further ventilation opening 134 is formed here as an airflow outlet channel.
  • the air flow inlet channel conducts fresh air essentially in the radial direction to the tool housing axis 112 into the hand-held power tool housing 110.
  • the air flow outlet channel conducts heated air out of the hand-held power tool housing 110 essentially in the radial direction to the tool housing axis 112 Tool housing axis 112 arranged.
  • the further ventilation opening 134 is essentially trapezoidal in shape. It is also conceivable for the further ventilation opening 134 to be designed essentially circular, elliptical, polygonal, in particular square or rectangular.
  • the air guiding unit 130 also includes a second air guiding element 138.
  • the second air guiding element 138 is in this case essentially in the form of an at least partially circumferential wedge-shaped projection.
  • the second air guiding element 138 is formed on the inner surface 115 of the hand-held power tool housing 110 .
  • the second air guiding element 138 is annularly formed on the inner surface 115 of the hand-held power tool housing 110 .
  • the second air guiding element 138 is designed in such a way that it forms the ventilation opening 132 and the further ventilation opening 134 .
  • the ventilation opening 132, the further ventilation opening 134, the air guiding element 136 and the second air guiding element 138 are formed in one piece.
  • the air guiding unit 130 is formed in one piece with the hand-held power tool housing 110 and is formed essentially c-shaped in the circumferential direction 105 to the tool housing axis 112 .
  • the air guiding element 136 and the actuating element 162 form the connecting line 107, with the hand-held power tool housing 110 forming the air guiding element 136 as the wedge-shaped, partially circumferential groove.
  • the connecting line 107 encloses the angle 108 in the range from 70° to 80° to the axis 112 of the tool housing.
  • the second air guiding element 138 is formed in the inner surface 115 of the hand-held power tool housing 110 as the at least partially circumferential wedge-shaped projection.
  • the ventilation opening 132 and the further ventilation opening 134 are formed as recesses in the wedge-shaped groove and the at least partially circumferential wedge-shaped projection.
  • Figure 3a a first section along the tool housing axis 112 in the radial direction 400 pointing away from the handle 111 is shown.
  • Figure 3b shows a second section along the tool housing axis 112 in the radial direction 500 towards the handle 111 pointing.

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

Claims (9)

  1. Machine-outil à main (100), notamment visseuse, comprenant un carter de machine-outil à main (110), notamment un carter de visseuse, comprenant au moins deux éléments de carter (113) qui entourent au moins partiellement une unité d'entraînement (120) de la machine-outil à main (100), notamment de la visseuse, comprenant au moins un axe de carter d'outil (112) et comprenant au moins une unité de guidage d'air (130) pour guider un courant d'air pour refroidir au moins l'unité d'entraînement (120), l'unité de guidage d'air (130) étant agencée transversalement à l'axe de carter d'outil (112),
    caractérisée en ce que
    l'unité de guidage d'air (130) et un élément d'actionnement (162) de l'unité d'actionnement (160) forment une ligne de liaison (107), la ligne de liaison (107) formant un angle (108) dans la plage allant de 60° à 90°, notamment dans la plage allant de 65° à 85°, tout particulièrement dans la plage allant de 70° à 80°, par rapport à l'axe de carter d'outil (112).
  2. Machine-outil à main (100) selon la revendication 1, caractérisée en ce que l'unité de guidage d'air (130) est réalisée essentiellement sous forme annulaire, notamment en forme de c, l'unité de guidage d'air (130) étant réalisée essentiellement dans la direction circonférentielle (105) par rapport à l'axe de carter d'outil (112).
  3. Machine-outil à main (100) selon la revendication 1 ou 2, caractérisée en ce que l'unité de guidage d'air (130) forme un angle (106) dans la plage allant de 60° à 90°, notamment dans la plage allant de 65° à 85°, tout particulièrement dans la plage allant de 70° à 80°, par rapport à l'axe de carter d'outil (112).
  4. Machine-outil à main (100) selon l'une quelconque des revendications précédentes, caractérisée en ce que l'unité de guidage d'air (130) présente au moins une ouverture d'aération (132) pour guider le courant d'air pour refroidir au moins l'unité d'entraînement (120).
  5. Machine-outil à main (100) selon la revendication 4, caractérisée en ce que l'ouverture d'aération (130) est réalisée essentiellement dans la direction circonférentielle (105) par rapport à l'axe de carter d'outil (112) et présente un angle d'ouverture (133) par rapport à l'axe de carter d'outil (112) dans la plage allant de 5° à 80°, notamment dans la plage allant de 25° à 75°, tout particulièrement dans la plage allant de 35° à 60°.
  6. Machine-outil à main (100) selon l'une quelconque des revendications précédentes, caractérisée en ce que l'unité de guidage d'air (130) comprend au moins une autre ouverture d'aération (134).
  7. Machine-outil à main (100) selon l'une quelconque des revendications précédentes, caractérisée en ce que l'unité de guidage d'air (130) comprend au moins un élément de guidage d'air (136), l'élément de guidage d'air (136) étant essentiellement formé comme une rainure cunéiforme agencée dans la direction circonférentielle (105) .
  8. Machine-outil à main (100) selon l'une quelconque des revendications précédentes, caractérisée en ce que l'unité de guidage d'air (130) présente au moins un deuxième élément de guidage d'air (138), le deuxième élément de guidage d'air (138) étant essentiellement réalisé sous la forme d'une saillie cunéiforme au moins partiellement périphérique.
  9. Machine-outil à main (100) selon l'une quelconque des revendications précédentes, caractérisée en ce que le deuxième élément de guidage d'air (138) forme l'ouverture d'aération (132) et l'autre ouverture d'aération (134).
EP19199466.4A 2018-10-08 2019-09-25 Machine-outil manuelle Active EP3639979B1 (fr)

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DE102008000441A1 (de) * 2008-02-29 2009-09-03 Robert Bosch Gmbh Akkumulatorgehäuse
JP2009220203A (ja) * 2008-03-14 2009-10-01 Hitachi Koki Co Ltd 携帯工具
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CN111002272B (zh) 2024-04-19
DE102018217155A1 (de) 2020-04-09
CN111002272A (zh) 2020-04-14

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