EP2982480B1 - Outil comprenant un dispositif de refroidissement pouvant être commandé - Google Patents

Outil comprenant un dispositif de refroidissement pouvant être commandé Download PDF

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Publication number
EP2982480B1
EP2982480B1 EP15163308.8A EP15163308A EP2982480B1 EP 2982480 B1 EP2982480 B1 EP 2982480B1 EP 15163308 A EP15163308 A EP 15163308A EP 2982480 B1 EP2982480 B1 EP 2982480B1
Authority
EP
European Patent Office
Prior art keywords
cooling
tool
drive means
drive
appliance
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
EP15163308.8A
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German (de)
English (en)
Other versions
EP2982480A1 (fr
Inventor
Eberhard Ruhs
Andreas Scharfenberg
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
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Publication date
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Publication of EP2982480A1 publication Critical patent/EP2982480A1/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
    • B25F5/008—Cooling means

Definitions

  • the present invention relates to a tool device, in particular a screwdriver or blind riveting tool.
  • a tool device in particular a screwdriver or blind riveting tool.
  • Such devices have been known for a long time from the prior art.
  • the invention is particularly directed to a battery powered tool such as a cordless handheld wrench.
  • a cordless handheld wrench Such tools are used, for example, in industry, such as in the auto industry to tighten or loosen screws.
  • EP 2 754 535 A2 describes a hand-held machine tool with a fan, which is designed as a fan and is arranged between a fan motor and inlet openings. The fan as a cooling device is driven so that the cooling capacity of the fan is independent of the rotational speed of a tool motor as an electric motor drive device controllable.
  • EP 2 647 472 A1 shows a power tool with a motor and a fan.
  • EP 2 404 708 A2 refers to a hand-held tacker, in which a cooling system is provided for cooling an electric motor.
  • the present invention has for its object to increase the duty cycle of such devices, so that with the screws at a customer, such as the automotive industry, shorter cycle times can be driven.
  • the problem to be solved is that, for example, when tightening screws, usually in the final tightening at low speeds, most of the heat is generated immediately before the engine is switched off.
  • to dissipate this heat is a further object of the invention.
  • An electrically operated tool device has a rotatable tool head or a rotatable tool element and an electromotive drive device for driving the tool head. Furthermore, the tool device has a control device for controlling the electromotive drive device and a power supply device in order to supply at least the drive device with electrical energy. Furthermore, the tool device has a first cooling device in order to cool the drive device and / or the control device.
  • the tool head or the tool element is rotatable about a predetermined and preferably with respect to the device fixed axis of rotation.
  • a cooling capacity of the cooling device can be controlled independently of a rotational speed of the electromotive drive device.
  • this cooling device can also be controlled independently of a start switch actuation of the tool device.
  • the tool device has a rotary shaft which is arranged between the drive device and the tool head.
  • the device has a switching device to actuate the drive means.
  • this switching device may not only be suitable for switching the drive device on and off but also preferably for controlling a rotational speed of the drive device.
  • the tool device has a housing, wherein in particular at least the drive device and the control device are integrated in this housing.
  • the housing is a plastic housing.
  • the device has a display device via which information or data can be output to a user, for example data which characterize a screwing operation currently to be carried out or data which inform the user about an attached screwing tool.
  • the device has an input device in order to input data to the device and in particular to the control device.
  • the user can specify parameters via this input device, such as a screwing speed, a torque to be applied and the like.
  • the tool device has a communication device, by means of which the tool device can communicate with other devices.
  • a communication device by means of which the tool device can communicate with other devices.
  • This is advantageously a wireless communication device.
  • the tool device has a transmission device which is arranged between the drive device and the tool head.
  • This is advantageously a reduction gear, which underpins a rotational speed of the drive device.
  • the device has a measuring device and in particular a measuring device which is suitable and intended for determine a working process, such as a screwing, characteristic parameters, such as a torque just applied.
  • a measuring device which determines a rotational position of the drive device and / or the tool head.
  • the energy supply device is a battery or a rechargeable battery.
  • the tool device could also be connected to a power grid, both for charging the battery and for operating the drive device.
  • the cooling device has a ventilation device which generates an air flow at least through regions of the tool device.
  • the cooling by means of air flowing through, that is made in the manner of air cooling.
  • other cooling could be provided, such as in the form of a Peltier element or the like.
  • the cooling device is variable in its cooling capacity. This can be done in particular via a variable speed of the ventilation device.
  • the cooling device has air inlet openings and air outlet openings for cooling air and at least one flow channel for the cooling air is formed between the air inlet openings and the air outlet openings. It is thus proposed here that the cooling air is conducted at least in sections through the drive device and / or the control device in order to cool these components.
  • the ventilation device is arranged downstream of the drive device and / or the control device.
  • air inlet openings and air outlet openings are located in areas of the tool devices that can not be covered by the hand of a user or a piece of clothing.
  • the tool device may have a handle element and the respective air outlet and Air inlet openings may be arranged such that when grasping this handle element no areas of the gripping hand can cover each of the air outlet openings or air inlet openings.
  • the air outlets and the air inlets may be arranged at locations which are not obscured by a garment of the user holding the tool apparatus.
  • this flow channel is designed such that the cooling air can be used both for cooling the drive device and for cooling the control device. It is possible that the cooling air is first passed through the drive device or the control device and then by the control device or the drive device. Preferably, the cooling air is first passed through the controller and then through the drive means.
  • the flow channel is arranged such that the air also flows through areas of a battery or a battery for operating the device.
  • air inlet openings are preferably arranged in a region of the energy source or the battery of the device.
  • the flow channel is designed such that the cooling air also serves to cool the power supply device.
  • At least one first air inlet opening and preferably a plurality of air inlet openings are arranged in a first region of the device and at least one second air inlet opening and preferably a plurality of second air inlet openings in a second region of the device, wherein said first region and said second region are spaced from each other.
  • these areas could be arranged in different areas of a housing of the device.
  • outlet openings are arranged in the region of the drive device. In this way, a length of the flow channel can be minimized and nevertheless provided an efficient cooling of all components relevant for cooling.
  • the tool device has a further cooling device for cooling at least one drive device.
  • the two cooling devices are operated independently.
  • the further cooling device has a cooling element coupled to a drive shaft.
  • a fan wheel may be arranged on the drive shaft.
  • the housing of the device is aerodynamically designed so that the air flow is passed through the battery, the electronics and the engine.
  • the tool device is selected from a group of tool devices which contains screwdrivers and rivet setting devices, in particular blind rivet setting devices.
  • the tool device is preferably a portable or mobile device and in particular a device which can be operated without cable connections.
  • the cooling device has a control device which controls a cooling capacity of the cooling device as a function of at least one operating parameter of the tool device.
  • the device has an intelligent control of the cooling device or of the fan on the basis of screwing data, temperature data, load profiles, etc.
  • the operating parameters are preferably selected from a group of operating parameters, which includes a temperature of the drive device, a temperature of the control device, a temperature of the power supply device, a rotational speed of the drive device, an engine power, an actual torque, a target torque and the like , Also, several of these parameters can be used for control.
  • the tool device has at least one temperature measuring device which determines a temperature of at least one component of the device.
  • a temperature measuring device may be provided for measuring a temperature of the drive device.
  • a temperature measuring device can also be used be provided for measuring a temperature of the control device.
  • a temperature measuring device for determining an outside temperature of the device may be present.
  • other measuring devices may be present, which determine, for example, a current torque and the like.
  • the device could have a plurality of temperature measuring devices, in order in particular to measure both temperatures of the control device and temperatures of the drive device.
  • a switching device is provided, by means of which the flow paths of the cooling medium can be changed. It would thus be possible, for example, for the flow path of the cooling air, in particular within the housing, to be controlled in such a way that, for the most part, the drive device or the motor is cooled.
  • valves, flaps or other valve devices may be provided in the flow channel.
  • the cooling device is thus preferably a controllable cooling device which can be regulated, in particular, with respect to its power, for example the rotational speed of a ventilator fan.
  • a higher duty cycle of the tooling device can be achieved.
  • a shutdown of the tool device during a screwing can be avoided in particular because of overtemperature, so that in this way the process reliability of the tool device is increased.
  • the tool device is overall more efficient, since the cooling problem is better solved according to the invention than in the prior art.
  • a higher power density than in a tool or screwdriver according to the prior art is possible.
  • FIG. 1 shows a schematic representation of a tool device according to the invention 100.
  • This tool device 100 in this case has an angle head 1, on which a turn rotatable tool head or a rotatable tool element 30 is arranged.
  • This rotary element is thereby driven via a measuring shaft 2 and a gear 3 by a drive device 4, ie an electric motor.
  • the reference numeral 5 indicates a rotary encoder or an angle sensor which serves to control the drive device.
  • the reference numeral 11 denotes a control and display unit with which the tool device can be controlled by a user.
  • the reference numeral 12 refers to a display device, such as a display, via which data can be output to the user.
  • other display elements may be provided and, for example, alarm output elements, such as speakers and the like.
  • Reference numeral 13 denotes an input device through which the user of the tool device can input data.
  • this may be a keypad.
  • the reference numeral 14 denotes a communication device, such as a radio module, by means of which the device can communicate wirelessly with other devices, such as a central computer.
  • the reference numeral 15 denotes an electronic control unit for controlling the drive device.
  • the reference numeral 10 refers to a connecting line, by means of which the measuring device (not shown) arranged on the shaft 2 is in communication with the control device 15.
  • the reference numeral 16 denotes a further connecting line, via which the control device 15 and the electric motor 4 may be in communication with a buffer capacitor 6.
  • the reference numeral 7 denotes a supply line for supplying power to the drive device 4.
  • the reference numeral 8 refers to a control device in the form of a drive electronics, which controls the power supply to the electric motor.
  • the reference numeral 9 finally denotes an energy storage device, such as a battery, which serves to supply power to the drive means.
  • the dashed arrow 22 indicates an air flow, which serves to cool the device. It can be seen that this air flow, starting from inlet openings 20 which are arranged in the region of the battery 9, is guided through an area of the housing as far as exit openings 21.
  • the reference numeral 19 denotes the cooling device for cooling the drive device 4, the battery 20 and the control device 8.
  • This cooling device here has a fan or a fan device, which sucks the cooling air through the housing here.
  • This cooling device is arranged here directly adjacent to the drive device 4. In this way, the flow paths for the cooling air can be kept short.
  • the cooling device 19 can also be controlled, for example by the control device 15.
  • a control of the cooling capacity can be effected as a function of one or more measured operating parameters, in particular a temperature of the drive device 4 and / or the control device 8.
  • the drive device is preferably an EC motor.
  • the reference numeral 32 roughly indicates a flow channel for the cooling air, which extends through the housing 19. In this case, portions of this flow channel also run through the drive device and / or the control device and / or the energy supply device or the battery.
  • the air flow can also be directed so that areas of the battery 9 are cooled and, if necessary, other areas, such as the control device for cooling the drive electronics as well 15.
  • the reference numeral 18 denotes a housing of the apparatus 100 in which the above-mentioned elements such as the driving device 4 are housed. This housing is preferably made of an electrically non-conductive material and more preferably of a plastic.
  • the reference numeral 17 refers to a line connection, which connects the control device 8, ie the power electronics, with the control device 15. Between the power electronics or the control device 8 and the drive device 4, the cooling air is preferably guided along a rectilinear path.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Manipulator (AREA)
  • Percussive Tools And Related Accessories (AREA)

Claims (9)

  1. Système d'outil (100) entraîné électriquement comportant une tête d'outil tournante (30), un dispositif d'entraînement par moteur électrique (4) destiné à entraîner la tête d'outil (30), un dispositif de commande (8) destiné à commander le dispositif d'entraînement par moteur électrique (4) et un dispositif d'alimentation en énergie (9) permettant d'alimenter au moins le dispositif d'entraînement par moteur électrique (4) en énergie électrique, dans lequel le système d'outil (1) comporte un premier dispositif de refroidissement (19) permettant de refroidir le dispositif d'entraînement (4) et/ou le dispositif de commande (8),
    dans lequel une puissance de refroidissement du dispositif de refroidissement (19) peut être commandée indépendamment d'une vitesse de rotation du dispositif d'entraînement par moteur électrique (4),
    dans lequel le premier dispositif de refroidissement (19) est disposé de manière directement adjacente au dispositif d'entraînement (4),
    caractérisé en ce que les ouvertures d'admission (20) destinées à un canal d'écoulement (32) de l'air de refroidissement sont disposées dans la zone d'un dispositif d'alimentation en énergie (9),
    dans lequel le dispositif de refroidissement (19) est disposé dans le système d'outil (100) entre le dispositif d'entraînement (4) et au moins une ouverture de sortie (21) du canal d'écoulement (32), et
    dans lequel le canal d'écoulement (32) s'étend à travers le dispositif d'entraînement (4) de manière au moins partiellement transversale à un arbre d'entraînement (2) entraîné par le dispositif d'entraînement (4).
  2. Système d'outil (100) selon la revendication 1,
    caractérisé en ce que le dispositif de refroidissement (19) comporte un dispositif de ventilation qui produit un écoulement d'air au moins à travers certaines zones du système d'outil (1).
  3. Système d'outil (100) selon la revendication 1 ou 2,
    caractérisé en ce que le canal d'écoulement (32) est configuré de manière à ce que l'air de refroidissement puisse être utilisé à la fois pour refroidir le dispositif d'entraînement (4) et pour refroidir le dispositif de commande (8).
  4. Système d'outil (100) selon l'une quelconque des revendications précédentes,
    caractérisé en ce que le dispositif d'alimentation en énergie (9) est réalisé sous la forme d'un dispositif accumulateur d'énergie.
  5. Système d'outil (100) selon au moins l'une des revendications précédentes,
    caractérisé en ce que les outils (100) comportent un autre dispositif de refroidissement destiné à refroidir au moins le dispositif d'entraînement (4).
  6. Système d'outil (100) selon la revendication 5,
    caractérisé en ce que l'autre dispositif de refroidissement comporte un élément de refroidissement couplé à un arbre d'entraînement (2).
  7. Système d'outil (100) selon au moins l'une des revendications précédentes,
    caractérisé en ce que le système d'outil (100) est sélectionné dans un groupe constitué de systèmes d'outils comprenant des appareils de vissage et des appareils de rivetage aveugle et de scellement.
  8. Système d'outil (100) selon au moins l'une des revendications précédentes,
    caractérisé en ce que le dispositif de refroidissement (19) comporte un dispositif de commande qui commande une puissance de refroidissement du dispositif de refroidissement (19) en fonction d'au moins un paramètre de fonctionnement du système d'outil (100).
  9. Système d'outil (1) selon la revendication 8,
    caractérisé en ce que le paramètre de fonctionnement est sélectionné dans le groupe de paramètres de fonctionnement qui comprend une température du dispositif d'entraînement (4), une température du dispositif de commande (8), une puissance du dispositif d'entraînement (4), une température du dispositif d'alimentation en énergie (20), une vitesse de rotation, une puissance du moteur, ou autres.
EP15163308.8A 2014-08-05 2015-04-13 Outil comprenant un dispositif de refroidissement pouvant être commandé Active EP2982480B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014215361.1A DE102014215361A1 (de) 2014-08-05 2014-08-05 Werkzeug mit steuerbarer Kühleinrichtung

Publications (2)

Publication Number Publication Date
EP2982480A1 EP2982480A1 (fr) 2016-02-10
EP2982480B1 true EP2982480B1 (fr) 2017-10-11

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Application Number Title Priority Date Filing Date
EP15163308.8A Active EP2982480B1 (fr) 2014-08-05 2015-04-13 Outil comprenant un dispositif de refroidissement pouvant être commandé

Country Status (3)

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US (1) US20160039081A1 (fr)
EP (1) EP2982480B1 (fr)
DE (1) DE102014215361A1 (fr)

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US6455186B1 (en) * 1998-03-05 2002-09-24 Black & Decker Inc. Battery cooling system
DE19839963A1 (de) * 1998-09-02 2000-03-09 Hilti Ag Elektrowerkzeug
DE19924552A1 (de) * 1999-05-28 2000-11-30 Hilti Ag Elektrisch betreibbares Handgerät
DE10242414A1 (de) * 2002-09-12 2004-03-25 Hilti Ag Elektrowerkzeugmaschine mit Gebläse
US7270910B2 (en) * 2003-10-03 2007-09-18 Black & Decker Inc. Thermal management systems for battery packs
DE102007000290A1 (de) * 2007-05-24 2008-11-27 Hilti Aktiengesellschaft Elektrisches Handwerkzeuggerät mit Elektronikkühlung
DE102007000524A1 (de) * 2007-10-18 2009-04-23 Hilti Aktiengesellschaft Elektrohandwerkzeugmaschine mit Motortemperaturkontrolle
GB0723914D0 (en) * 2007-12-07 2008-01-23 Johnson Electric Sa A power tool
JP5309920B2 (ja) * 2008-11-19 2013-10-09 日立工機株式会社 電動工具
JP5416397B2 (ja) * 2008-12-19 2014-02-12 株式会社マキタ 作業工具
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EP2558247B1 (fr) * 2010-06-30 2014-10-01 Hitachi Koki Co., Ltd. Outil à impact
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JP2013202702A (ja) * 2012-03-27 2013-10-07 Hitachi Koki Co Ltd 電動工具
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Also Published As

Publication number Publication date
EP2982480A1 (fr) 2016-02-10
US20160039081A1 (en) 2016-02-11
DE102014215361A1 (de) 2016-02-11

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