EP1902817A2 - Outil électrique sans fil et système de fabrication - Google Patents

Outil électrique sans fil et système de fabrication Download PDF

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Publication number
EP1902817A2
EP1902817A2 EP07017039A EP07017039A EP1902817A2 EP 1902817 A2 EP1902817 A2 EP 1902817A2 EP 07017039 A EP07017039 A EP 07017039A EP 07017039 A EP07017039 A EP 07017039A EP 1902817 A2 EP1902817 A2 EP 1902817A2
Authority
EP
European Patent Office
Prior art keywords
power tool
module
tool according
cordless power
radio
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.)
Withdrawn
Application number
EP07017039A
Other languages
German (de)
English (en)
Other versions
EP1902817A3 (fr
Inventor
Wolfgang Heinrich Kofink
Franz Peter Scheuring
Konrad August Stölzle
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.)
Apex Tool Group GmbH and Co OHG
Original Assignee
Cooper Power Tools GmbH and Co OHG
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 Cooper Power Tools GmbH and Co OHG filed Critical Cooper Power Tools GmbH and Co OHG
Publication of EP1902817A2 publication Critical patent/EP1902817A2/fr
Publication of EP1902817A3 publication Critical patent/EP1902817A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers

Definitions

  • the invention relates to a cordless power tool, in particular screwdriver, with at least one drive device, a voltage supply connected thereto, a drive control and a wireless transmission device for transmitting data, parameters or the like between the power tool and a higher-level control unit.
  • the invention also relates to a manufacturing system with a number of such power tools.
  • Such a cordless power tool is used, for example, along production lines by appropriate workers to bolt parts together in automobile production or the like.
  • the drive device usually comprises an electric motor, a transmission and a shaft driven by these. At the end of the shaft, for example, a Aufstecknuss or the like can be attached to fasten screws or to solve.
  • the power supply is formed by a rechargeable battery, which is usually arranged detachably at the lower end of a tool handle.
  • a power tool comprises a drive control in the form of a servo controller or the like, which controls the drive means.
  • a wireless transmission device in the form of an infrared transmission device is used for the transmission of data, parameters or the like.
  • data data between the power tool and a higher-level control unit are interchangeable.
  • data are for example predetermined parameters in a screw connection, control data for the power tool or the like.
  • Such an infrared transmission device can only be used to a limited extent if, for example, obstacles are arranged between the power tool and a corresponding receiving device for the infrared light. There is also the possibility that by moving workers between power tool and infrared receiving device, the corresponding compound is at least temporarily interrupted. In addition, the infrared connection can only be used for limited distances and partly interfered with by other infrared sources.
  • the corresponding infrared transmission device is fixedly arranged on the power tool and possibly only after partial Auseinandemehmen the power tool detachable or replaceable.
  • the invention is therefore based on the object to improve such a wireless power tool of the type mentioned in that a corresponding transmission of data, parameters or the like with a simple, constructive effort over longer distances is certainly possible and at the same time adapting to other conditions is quickly and easily possible with respect to a corresponding connection between the power tool and higher-level control unit.
  • the transmission device has at least two parts.
  • a first part is a module adapter detachably mounted on the power tool. This is easy from the outside of the power tool attachable and also detachable.
  • the module adapter is used to arrange various replaceable wireless modules. This makes it possible to use different radio modules with different characteristics depending on the application, environment and the like.
  • the wireless module is easily replaceable.
  • the range of the radio connection is usually increased and obstacles between the power tool and higher-level control unit by no means lead to an interruption of this radio connection.
  • a simple arrangement of the module adapter is conceivable, wherein this is arranged between power supply and tool handle.
  • the corresponding contact point for the power supply is usually normalized for at least power tools of a manufacturer, so that in a simple way, the module adapter is adaptable to these standards and used for different power tools.
  • the wireless module may be included in the module adapter so that it surrounds the radio module, with a further coverage of the radio module by power supply and tool handle with appropriate arrangement of Module adapters between them can be done.
  • module adapter is arranged between the tool handle and the power supply, it is furthermore advantageous if it has corresponding devices, so that an electrical connection between the drive device or drive control and power supply passes through the module adapter or is realized by the latter.
  • the module adapter is, see the above statements, designed not only for receiving different radio modules, but can also be detachably arranged on various power tools, such as a pistol-shaped screwdriver, an angle wrench or the like.
  • a WLAN module 868-MHz module or even a 915-MHz module can be considered.
  • Other types of radio modules are also usable.
  • WLAN For a WLAN module, it is possible in a simple manner to establish a corresponding radio connection to the higher-level control unit, for example by assigning a WLAN base station to the control unit, with which the WLAN module is in radio communication.
  • a WLAN base station may be a base station already used in practice. This is usually referred to as a WLAN access point.
  • WLAN is a wireless local area network or wireless network.
  • Such WLANs usually have quite large transmission powers and ranges and also quite high data transmission rates. All parameters or characteristics known with regard to such WLANs also apply in the invention, such as operating the WLAN in infrastructure mode or in ad hoc mode, possibilities of data security such as encryption or the like, use of corresponding frequencies according to the standards IEEE 802.11, corresponding data rates etc.
  • the WLAN base station can be part of a corresponding radio network, which in particular is also connected to other WLAN base stations.
  • the corresponding WLAN module of the transmission device can in particular be connected in series with the drive control, a measuring device for measuring tool variables or the like.
  • tool variables are, for example, speed of the drive device, torque, etc.
  • the radio module can be connected to the power supply of the power tool.
  • the radio module has its own power supply within the module adapter.
  • a radio antenna is usually required, which can be advantageously arranged in or on the module adapter. It is possible to accommodate the radio antenna in the module adapter so that, for example, such an antenna does not protrude from the module adapter and can be damaged if necessary.
  • the WLAN module or another radio module can be connected to the transmission of data with various facilities, including, as a rule, appropriate interfaces are required.
  • Such interfaces may be an Ethanet or USB bus interface, a memory card interface, a Universal Access Receiver Transmitter (UART) interface, a digital audio interface, or the like.
  • Such WLAN modules can be adapted relatively easily to the corresponding conditions on site, since, for example, corresponding networks or WLAN base stations already exist and nowadays the corresponding requirements of the WLAN are well known.
  • other radio modules are also usable, such as 868 or 915 MHz modules connected to a corresponding 865/915 MHz base station.
  • the corresponding base station can be converted by a 433-868 or 915-MHz conversion module, corresponding to the use of the radio module in the power tool.
  • the conversion modules are the same as the radio modules in the power tool.
  • a corresponding base station is detachably integrated in the higher-level control unit.
  • a base station may be included in another unit of the network.
  • the antenna does not protrude outwards from the transmission device but is contained in the corresponding radio module, for example.
  • dual or multi-band radio modules may also be used, including, for example, an 868 and a 915 MHz module.
  • a wireless power tool according to the invention is used for machining critical and safety-relevant workpieces, then it may be necessary that, for example, the screwdriver requires an exact assignment of tightening torque, rotational speed or the like to the corresponding screw connection.
  • This can be done by a scanning device on the power tool is arranged in particular releasably.
  • a scanning device for example, a barcode on the workpiece can be scanned and thus the workpiece identifiable.
  • the scanning device can also be done an identification of the worker, if this is associated with a corresponding barcode.
  • the scanning device is advantageously arranged so that it points in the direction of the workpiece when the power tool is used according to its task.
  • One way to arrange the scanning device is that it is part of the module adapter. In this way it is attachable and degradable together with the module adapter.
  • Other Scanning devices are arranged, for example, parallel to the corresponding shaft of a screwdriver.
  • the scanning device can be connected to the radio module via a data line.
  • an infrared transmission device can be arranged on the power tool. This can for example be used independently of the radio module for the transmission of data, parameters or the like.
  • a particular field of use of such an infrared transmission device can be seen, for example, in that it is used for the transmission of setting data for initialization or parameterization of the corresponding radio module.
  • a memory device may be provided in the electric motor and / or in the module adapter.
  • this memory device at least some characteristics of the corresponding radio module are stored, whereby this is identifiable and then setting data for initialization or parameterization can be transmitted for the corresponding module.
  • the base station In order to operate the base stations for the corresponding radio modules as independent as possible of an external power supply, the base station can be assigned its own power supply.
  • the scanning device can be connected to the radio module for the transmission of corresponding data.
  • the scanning device may be connected to the infrared transmission device.
  • Another advantage according to the invention is that not only, for example, when storing the power tool in a holder or a certain orientation of the power tool a Transmission of data or the like is possible. Instead, such a transmission of data, parameters or the like may be activated even when using the power tool. That is, at any time required data, parameters or the like between the power tool and in particular the parent control unit can be replaced.
  • the parent control unit or directly with other devices such as printers, parameter server, maintenance center, tool manufacturer, Internet or the like is connectable.
  • printing of data directly initiated by the radio module and transmitted via the base station can also take place at certain times.
  • parameter servers directly corresponding parameters for the operation of the power tool via the base station to the wireless module and thus can transmit to the power tool.
  • Service queries are also possible by the service center or by the tool manufacturer.
  • a corresponding connection can be made via the Internet from one base station to the other and thus between different power tools.
  • a PC a maintenance center, the tool manufacturer or the like
  • input / Selection masks be carried out and monitored.
  • these masks may be used to select an interface of the radio module, to determine the type of radio connection, for example to select and specify an IP address in an Internet, to determine an assignment of the radio module to the corresponding power tool, to determine the parts or the like used by the power tool or select.
  • data security such as encryption.
  • the radio module can also be programmable via the infrared transmission device.
  • Such programming relates, for example, to the above-mentioned initialization or parameterization data.
  • the status of the radio module or the like in particular the module adapter can have a signaling device. This can work audio-visually and be designed for example as a buzzer, LED or the like.
  • the transmission device or the rest of the power tool has, in particular, programmable keys. Due to this, different activities can be called up depending on the area of application.
  • a tool tracking in particular for determining the orientation of the power tool in the room is possible.
  • This can be realized for example by three rotation rate sensors, which are assigned to the power tool. These rotation rate sensors determine measurement data from the integration of which three angles of rotation can be calculated, which determine the orientation of the power tool in space. It is also possible to exchange such data with the wireless network.
  • certain positions in the space for the use of the power tool are transmitted by the radio network in this and are compared within the power tool with the corresponding orientation data for tool tracking. This makes it possible to determine whether, for example, all activities on site were carried out at the appropriate place by the worker.
  • the corresponding rotation rate sensors can be integrated in the power tool.
  • rotation rates do not relate to the rotation of the screw shaft or the like, but a rotation or displacement of the entire power tool in space.
  • additional sensors may be provided, such as acceleration sensors or magnetic field sensors, which serve in addition or as an alternative to the yaw rate sensors for tool tracking and position determination in space.
  • the invention also relates to a production system with at least one control level and a number of connected thereto, along a processing line of workpieces arranged wireless power tools of the type described above.
  • the connection is made in this context via a network and network-connected base stations, each of which is associated with one or more power tools.
  • Parts of the network can be different servers which serve, for example, for the provision of data, for data backup or the like.
  • a connection to an auxiliary device can be established via the corresponding radio connection via the assigned base station or also directly.
  • an auxiliary device is for example a printer, a visualization device, a display device, a tool part storage device or the like.
  • corresponding auxiliary devices can be connected analogously to the base station via a corresponding radio link.
  • wireless power tools it is possible to perform data transmission to the wireless power tools as broadcast or multicast, where "broadcast” corresponds to transmission of equal data to all connected power tools and “multicast” corresponds to transmission of data to a selected subset of all power tools.
  • broadcast corresponds to transmission of equal data to all connected power tools
  • multicast corresponds to transmission of data to a selected subset of all power tools.
  • direct point-to-point connections i. a unicast transmission possible.
  • WLAN modules can be used in addition to 868 MHz 915 MHz or Bluetooth modules.
  • Fig. 1 shows a side view of a first embodiment of a cordless power tool 1 according to the invention.
  • This is a so-called pistol-shaped screwdriver 10.
  • the screwdriver has a drive device 2, for example, electric motor, gearbox and rotary shaft.
  • a corresponding screw nut 36 is arranged interchangeable.
  • the power tool has a power supply 3, which comprises a rechargeable battery or an accumulator.
  • a corresponding drive control 4 for example, the electric motor with respect to speed and applied torque can be controlled.
  • a corresponding power tool 1 also has a measuring device 15, for example for determining rotational speed, torque, torque curve or the like.
  • This measuring device 15 is arranged at the appropriate location within the power tool 1.
  • the transmission device 5 is not arranged in the power tool 1 or integrated therein, but has at least one module adapter 7 and a radio module 8 arranged therein.
  • the module adapter 7 is shown in FIG. 1 in the lateral view as a substantially rectangular intermediate part between tool handle 9 and power supply 3 arranged.
  • a corresponding radio module 8 is shown in principle in FIG. 7, for example.
  • FIG. 2 a second embodiment of a cordless power tool 1 is shown according to the invention, this being realized as an angle wrench 11.
  • the remaining parts correspond to those of FIG. 1, wherein like parts in this as well as in the following figures are identified by the same reference numerals and the reference numerals are partially explained only in connection with a figure.
  • module adapter 7 is the same as in FIG. 1, so that module adapter 7 with radio module 8 can be used with all corresponding power tools.
  • Fig. 3 is a schematic diagram of a first embodiment of a radio network 13 is shown.
  • This comprises at least a number of power tools 1 in the form of pistol-shaped screwdrivers 10 and Winkelschraubem 11.
  • the radio modules are WLAN modules that establish a radio connection to a WLAN base station 12, i. to a so-called WLAN access point.
  • This is a conventional access point, which can also be used in other contexts for WLAN.
  • the WLAN base station 12 is assigned a separate power supply 23.
  • the WLAN base station 12 is connected by means of a connection 40 to a higher-level control unit 6 of the radio network 13.
  • a higher-level control unit 6 may be, for example, a PC or another screw control device.
  • connection 40 can be designed as Ethernet or WLAN connection.
  • the corresponding requirements for the WLAN connections or the WLAN module are similar to other WLAN connections, for example, in terms of coverage, security standards, encryption, power consumption, infrastructure, etc.
  • FIG. 4 shows a second exemplary embodiment of a corresponding radio network 13, which differs from that according to FIG. 3 in the type of radio module and correspondingly in the type of base station.
  • the radio modules are 868/915 MHz modules 19 used in the corresponding power tool 1.
  • the radio connection is made from these modules to a 868/915 MHz base station 18.
  • a conversion of the corresponding transmission device 5 can be done in a simple manner by using an 868 or 915 MHz module both on the part of the power tool 1 and on the side of the base station 18 done.
  • a connection 40 is made to the higher-level control unit 6 in its various possible embodiments.
  • power tools 1 are shown in the form of a pistol-shaped screwdriver 10 or angle wrench 11, which in addition to the transmission device 5 and the rest of the device of the power tool 1 have a scanning device 20.
  • This scanning device is used for scanning, for example, a bar code 37.
  • the scanning device is generally aligned according to the direction of use of the power tool 1.
  • the scanning device is part of the transmission device 5 and in particular of the module adapter 7.
  • FIG. 7 shows a schematic illustration of corresponding components of a power tool 1.
  • a component is, for example, the transmission device 5, which is connected to a radio antenna 17.
  • the transmission device 5 has, in the corresponding module adapter 7, a radio module 8, which may be a WLAN module or an 868/915 MHz module 19.
  • the transmission device 5 has an interface 41, which may be a bus interface for Ethernet or USB, a memory card interface, a UART interface, a digital audio interface or the like. It is also possible to use several such interfaces for such a module.
  • an interface 41 which may be a bus interface for Ethernet or USB, a memory card interface, a UART interface, a digital audio interface or the like. It is also possible to use several such interfaces for such a module.
  • a serial interface is provided for a serial connection 14 to a controller 16.
  • This controller is part of the power tool 1 and connected to the other components of the tool, such as drive control 4 in the form of a servo controller, scanning device 20, measuring device 15 or infrared transmission device 21.
  • This is, see for example Fig. 5, below and substantially parallel to one arranged corresponding rotary shaft of the power tool and aligned in the direction of insertion of the tool.
  • the infrared transmission device 21 also serves to transmit data, parameters or the like between the power tool and, for example, the higher-level control unit 6, see FIGS. 3 and 4.
  • the radio antenna 17 according to FIG. 7 can also be arranged in a further embodiment within the transmission device 5 and in particular within the module adapter 7.
  • Module adapter 7 or also controller 16 may further comprise a memory device 22.
  • This serves, for example, in the form of an EEPROM for storing the type of the radio module 8 or 19 as well as optionally for storing further parameters of the radio module or other devices of the power tool 1.
  • a transmission of corresponding data, parameters or the like can take place independently of the radio module and the infrared transmission device can also be used in particular for the transmission of setting data for initialization or parameterization of a corresponding radio module.
  • a WLAN module as a radio module can be designed according to the standards IEEE 802.11 and for transmitting corresponding data rates.
  • Security settings such as WEP, WPA, WPA2 and RC4, TKIP or AES encryption are possible.
  • FSK or GFSK modulation will occur at data rates ranging from a few kbps to a few 100 kbps.
  • Such a module may also have a UART interface or other interfaces.
  • the scanning device 20 which is for example a bar code reader, can also be connected directly to the radio module 8 or to it via the controller 16. The transmission of the corresponding scanned data takes place via the radio module.
  • corresponding data can also be received by the radio module, which relate, for example, to an update or programming of the radio module.
  • Corresponding data for programming can also be transmitted via the IR transmission device between the power tool and the control unit 6.
  • the transmission of such data, parameters or the like can take place independently of time of a corresponding use of the power tool, so that, for example, there is no need to align for data transmission of the power tool in a certain way or even store.
  • a signaling device of the module adapter or the transmission device for example, audio / visually indicate a certain status of either the radio module or the power tool.
  • a signaling device may be a buzzer, an LED or the like.
  • programmable keys which have the transmission device or the remaining power tool.
  • Such keys may be programmable according to the type of the radio module, the field of application of the power tool and the like.
  • the higher-level control unit 6 of FIG. 3 and 4 it is possible to perform a diagnostic program in the radio network for the transmission device or other parts of the power tool 1.
  • FIG. 8 shows a schematic representation of a manufacturing system 30 which may have a plurality of power tools 1 of the type previously described.
  • This manufacturing system 30 also has at least one control level 31, for example in the form of a master computer.
  • the corresponding components of the manufacturing system 30 are interconnected via a network 13 in the manner of Ethernet or TCP / IP, see reference numeral 28.
  • the various components of the manufacturing system 30, for example, a backup server 25 as an auxiliary device 32.
  • a server for example, screwing data for data backup and Save statistics.
  • Another component is a screw data server 42 for providing screwing data or the higher-level control unit 6 in the form of, for example, a PC 29 for the operation, parameterization and monitoring of the system.
  • a corresponding base station 12 or 18 is in radio communication with at least one power tool 1 in the form of a pistol-shaped screwdriver 10.
  • the corresponding radio link 39 is not only to the power tool 1, but to other auxiliary equipment 31 of the manufacturing system, such as visualization device 33, display device 34, Tool part memory 35 or the like. For simplicity, only a few of these other auxiliary devices 32 are shown.
  • the corresponding production system 30 can also comprise a belt control device 38 as a further auxiliary device 32.
  • a corresponding connection to a printer 24, a maintenance point 26 or even the tool manufacturer 27 can take place as further auxiliary devices.
  • a corresponding printer 24 or other auxiliary devices 32 are wirelessly connected to the corresponding network via, for example, WLAN modules or also 868/915 MHz modules.
  • the higher-level control unit 6 as part of the network input and / or display masks or the like can be called to make, for example, an initialization or parameterization of the corresponding radio module.
  • data pertain to IP address, network designation, network authentication, data encryption, password entry, radio module selection, and the like.
  • the transmission device 5 comprises the module adapter 7 and the radio module 28 arranged therein.
  • an initialization and parameterization of, for example, the higher-level control unit 6 by means of corresponding input and / or selection masks.
  • Fig. 8 can be dispensed with, for example, a direct nutrunner control.
  • Various auxiliary devices such as printers, tool parts storage device or the like are addressed directly by the screw data server 42 via a correspondingly assigned IP address and via WLAN. This also applies analogously to the band control 38. Due to the possibility of the corresponding flexible connections changes in the production process in such a manufacturing system can be realized in a simple manner.
  • An expiration can be seen, for example, in that initially the corresponding screwdriver 10 is locked and not ready for use.
  • a worker scans a corresponding barcode on the workpiece, which can already be done via the corresponding scanning device 20 of the screwdriver 10.
  • the band control 38 recognizes the workpiece, for example when it enters a screwing station, which is associated with the screwdriver 10 shown in FIG. 8. If the workpiece is identified, the ffersorgeserver 42 transmits corresponding screwing parameters to the screwdriver 10.
  • the type of screw to be used 36 is transmitted via the visualization device 33 or display 34 and the worker removes this the tool part storage device 35.
  • printing of the data via the connected printer 24 or visualization by means of the visualization device 33 or the display device 34 as well as in the higher-level control unit 6 can also take place.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Power Tools In General (AREA)
EP07017039A 2006-09-22 2007-08-30 Outil électrique sans fil et système de fabrication Withdrawn EP1902817A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200620014606 DE202006014606U1 (de) 2006-09-22 2006-09-22 Kabelloses Elektrowerkzeug und Fertigungssystem

Publications (2)

Publication Number Publication Date
EP1902817A2 true EP1902817A2 (fr) 2008-03-26
EP1902817A3 EP1902817A3 (fr) 2009-05-13

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