EP4238703A1 - Machine-outil pourvu d'accumulateur intégré - Google Patents

Machine-outil pourvu d'accumulateur intégré Download PDF

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Publication number
EP4238703A1
EP4238703A1 EP22159558.0A EP22159558A EP4238703A1 EP 4238703 A1 EP4238703 A1 EP 4238703A1 EP 22159558 A EP22159558 A EP 22159558A EP 4238703 A1 EP4238703 A1 EP 4238703A1
Authority
EP
European Patent Office
Prior art keywords
machine tool
charging
energy storage
housing
interface device
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.)
Pending
Application number
EP22159558.0A
Other languages
German (de)
English (en)
Inventor
Wolfgang Beck
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Priority to EP22159558.0A priority Critical patent/EP4238703A1/fr
Priority to PCT/EP2023/054452 priority patent/WO2023165877A1/fr
Publication of EP4238703A1 publication Critical patent/EP4238703A1/fr
Pending legal-status Critical Current

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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

Definitions

  • the present invention relates to a machine tool containing a housing and a drive positioned in the housing.
  • the present invention relates to a system containing a loading device and at least one machine tool that can be connected to the loading device.
  • the accumulator essentially contains a large number of energy storage cells (also called accumulator cells), which are positioned in a fixed housing. With the help of the energy storage cells, electrical energy can be stored by the accumulator and also made available for a machine tool.
  • energy storage cells also called accumulator cells
  • An interface is provided on one side of the housing of the accumulator, through which the accumulator can be releasably connected either to a machine tool or to a charging device.
  • the accumulator In order to charge an accumulator with electrical energy, the accumulator is releasably connected to the charging device.
  • the charging devices have an interface on one side of the housing of the charging device, through which the accumulator is mechanically and electrically connected to the charging device.
  • Charging devices and in particular those that are used to charge the accumulators for machine tools are designed to be relatively expensive and complex.
  • the relatively expensive and complex design of these charging devices is due to the fact that the charging devices are used in harsh or demanding environments (e.g. on construction sites or workshops) and at the same time have to supply highly developed accumulators with electrical energy in sometimes complicated charging processes.
  • these charging devices must be very solid and resistant and, on the other hand, they must be equipped with sensitive technology.
  • the design of the interface on the charging device represents a particular technical challenge.
  • Penetrating water can, among other things, cause short circuits in the charging device and thus permanently damage the charging device.
  • Penetrating dust and other dirt can also damage the charging device.
  • the object is achieved in particular by a machine tool containing a housing and a drive positioned in the housing.
  • At least one energy storage cell is positioned in the form of a pouch cell inside the housing and at least one interface device is included for selectively supplying the at least one energy storage cell with electrical energy.
  • the at least one interface device may be designed in the form of a USB socket.
  • the interface device may be designed to enable the at least one energy storage cell to be supplied with a voltage value of 21 to 60 V, in particular 48 V.
  • the interface device may be designed to enable the at least one energy storage cell to be supplied with a current value of 1 to 10 A, in particular 5 A.
  • the interface device may be designed to enable the at least one energy storage cell to be supplied with a charging power of 21 to 600 W, in particular 240 W.
  • the object is achieved by a system containing a loading device and at least one machine tool that can be connected to the loading device.
  • the system provides that the machine tool contains a first communication device, at least one energy storage cell configured as a pouch cell, and a machine tool interface device, and the charging device contains a second communication device and a charger interface device, so that the charging device and the machine tool can be used to charge the at least an energy storage cell with electrical energy can be connected, the charger interface device being designed in the form of a USB plug and the machine tool interface device being designed in the form of a USB socket.
  • figure 1 shows a system 1 according to the invention from a loading device 2 according to the invention and a machine tool 3 according to the invention according to a first embodiment.
  • the machine tool 3 is designed in the form of a hammer drill, for example.
  • the machine tool 3 can also be designed in the form of a drill, a saw, a grinder or the like.
  • the machine tool 3 essentially contains a housing 4, a handle 5, a tool holder 6, a drive 7, a transmission device 8, an impact mechanism device 9, an output shaft 10, a control device 11 and a number of energy storage cells 12.
  • the housing 4 essentially contains a front end 4a, a rear end 4b, an upper end 4c and a lower end 4d.
  • the handle 5 is used to hold and guide the machine tool 3 and is positioned at the rear end 4b of the housing 4 .
  • the tool holder 6 serves to receive and hold a tool 13 designed as a drill and is positioned at the front end 4a of the housing 4 .
  • the drive 7 is designed in the form of a brushless electric motor and is used to generate a torque.
  • the drive 7 configured as an electric motor
  • the transmission device 8, the impact mechanism device 9, the output shaft 10 and the tool holder 6 are shown in the illustration so arranged in relation to one another in the housing 4 of the machine tool 3 that the torque generated in the drive 7 via the transmission device 8, the impact mechanism device 9, the output shaft 10 is transferred to the tool holder 6.
  • the energy storage cells 12 are used in particular for the drive 7 as an energy supply and are designed in the form of pouch cells. According to the first embodiment, the energy storage cells 12 designed as pouch cells are positioned in a cavity HR of the housing 4 in the vicinity of the handle 5, cf. figure 1 .
  • the energy storage cells 12 are connected to one another and to the control device 11 via corresponding lines.
  • the control device 11 is in turn connected to the drive 7 with a corresponding line L1. Electrical energy can travel from the energy storage cells 12 to the control device 11 and from the control device 11 to the drive 7 through the line L1.
  • the control device 11 is positioned inside the housing 4 of the machine tool 3 and contains, among other things, a current measuring device 14, a voltage measuring device 15 and a communication device 16.
  • the control device 11 is used to control and regulate the individual functions of the machine tool 3.
  • the various functions include setting a specific voltage value or current value for electrical energy for charging the energy storage cells 12 connected to the charging device 2.
  • the current measuring device 14 is used to measure or record a current value.
  • the voltage measuring device 15 is used in turn to measure or record an electrical voltage value.
  • the communication device 16 serves to send and receive electrical signals and can also be referred to as a transceiver or transceiver unit.
  • the machine tool 3 can communicate with the loading device 2 with the aid of the communication device 16 .
  • electrical signals for the exchange of data and information between the machine tool 3 and the loading device 2 are sent and received.
  • a machine tool interface device 17 in the form of a USB socket is positioned at the rear end 4b of the housing 4 of the machine tool 3 .
  • the machine tool interface device 17 designed as a USB socket is used to receive a USB plug and is connected to the energy storage cells 12 on the inside of the housing 4 .
  • USB means "Universal Serial Bus”.
  • electrical energy can reach the energy storage cells 12 from the charging device 2 through the machine tool interface device 17 configured as a USB socket.
  • the machine tool interface device 17 configured with a USB socket can also be used for a discharge process of the energy storage cells 12 if electrical energy is intended to reach the charging device 2 from the energy storage cells 12 .
  • the machine tool interface device 17 designed as a USB socket is also sufficient for electrical signals for the exchange of data and information to be transmitted and received by the USB socket 17 .
  • the USB socket 17 is connected to the communication device 16 via a second line L2.
  • the machine tool 3 according to the invention is shown according to a second exemplary embodiment.
  • the machine tool 3 according to the second exemplary embodiment essentially corresponds to the machine tool 3 according to the first exemplary embodiment.
  • the energy storage cells 12 designed as pouch cells are not positioned in a cavity HR of the housing 4 below the handle 5 in the second exemplary embodiment, but are positioned in a cavity HR next to the drive 7 .
  • the control device 11 is also arranged below the energy storage cells 12 and the drive 7 .
  • the energy storage cells 12 designed as pouch cells can also be arranged at a different position within the housing 4 of the machine tool 3, for example around the striking mechanism device 9.
  • the charging device 2 serves to charge or supply the energy storage cells 12 that can be connected to the charging device 2 in the interior of the machine tool 3 with electrical energy.
  • the charging device 2 can also be possible for the charging device 2 to be designed for charging or supplying more than a single machine tool 3 or its energy storage cells 12 with electrical energy.
  • the charging device 2 can alternatively be able to charge a plurality of machine tools 3 or their energy storage cells 12 at the same time.
  • the charging device 2 shown essentially contains a charger housing 18, a control device 19, a connection cable 20 and a charger interface device 21.
  • the charger housing 18 has a top 18a, bottom 18b, a first side wall 18c, second side wall 18d, third side wall and fourth side wall.
  • the third side wall and fourth side wall are not shown in the figures.
  • the connection cable 20 is fixed to the first side wall 18c and the charger interface device 21 is fixed to the second side wall 18d.
  • connection cable 20 includes a first end 20a and a second end 20b.
  • the connection cable 20 is fastened to the first side wall 18c of the charger housing 18 with the first end 20a.
  • a connector 22 for a Sockets positioned with which the connecting cable 20 can be connected to a socket.
  • the socket is not shown in the figures.
  • the loader interface device 21 is designed in the form of a third line L3 with a first end 21a and a second end 21b.
  • the first end 21a is positioned on the second side wall 18c of the supercharger housing 18 .
  • a USB plug 23 is positioned at the second end 21b of the charger interface device 21 .
  • the USB plug 23 is designed to be releasably connected to a correspondingly designed USB socket 17 .
  • connection of the USB plug 23 to the USB socket 17 serves not only to transmit electrical energy but also to transmit or exchange data and information in the form of electrical signals.
  • the control device 19 is positioned inside the charger housing 18 and contains, among other things, a current measuring device 24, a voltage measuring device 25 and a communication device 26.
  • the control device 19 is used to control and regulate the individual functions of the charging device 2.
  • the various functions of the control device 19 include setting a specific voltage value or current value for electrical energy for charging a battery 3 connected to the charging device 2.
  • the current measuring device 24 is used to measure or record a current value.
  • the voltage measuring device 25 is used in turn to measure or record an electrical voltage value.
  • the communication device 26 serves to send and receive electrical signals and can also be referred to as a transceiver or transceiver unit.
  • the charging device 2 can communicate with the machine tool 3 with the aid of the communication device 26 . For this purpose, electrical signals for the exchange of data and information between the machine tool 3 and the loading device 2 are sent and received.
  • the communication device 26 contains a communication element 26a and a transmission element 26b.
  • the transmission element 26b is configured by the line L4.
  • electrical signals for the exchange of data and information between the charging device 2 and the machine tool 3 can also be exchanged with the aid of the line L4.
  • the machine tool 3 By carrying out a controlled charging process of the energy storage cells 12 positioned in the machine tool 3 by the charging device 2, as in figure 1 indicated, the machine tool 3 is releasably connected to the loading device 2 .
  • the free end of the third line L3 with the USB plug 23 of the charging device 2 is connected to the USB socket 17 of the machine tool 3 .
  • electrical signals can be exchanged between the charging device 2 and the machine tool 3 by connecting the USB plug 23 of the charging device 2 to the USB socket 17 of the accumulator 3 .
  • a signal is first sent from the communication device 16 of the machine tool 3 to the communication device 26 of the charging device 2 in order to transmit energy storage cell characteristic values.
  • the transmission of the energy storage cell characteristic values serves to identify the energy storage cells 12 to the charging device 2.
  • the identification sends specific properties of the energy storage cells 12 to the charging device 2 in the form of electrical signals.
  • the properties of the energy storage cells 12 include, for example, a maximum permissible voltage value, current value or power value for charging the energy storage cells 12 with electrical energy.
  • a signal is sent from communication device 16 of machine tool 3 to communication device 26 of charging device 2 in order to request or set a specific voltage value, current value or power value for charging energy storage cells 12 with electrical energy from charging device 2.
  • the determined voltage value may be 48V, the determined current value may be 5A, or the determined power value may be 240W.
  • a signal is sent from the communication device 26 of the charging device 2 to the communication device 16 of the machine tool 3 to indicate the charging capability or compatibility of the charging device 2 and the connected energy storage cells 12 for a charging process.
  • a further signal is sent from the communication device 16 of the machine tool 3 to the communication device 26 of the charging device 2 in order to set the charging device 2 to a charging state.
  • the charging device 2 is generally designed in such a way that it can be set to a charging state, a neutral state (also referred to as “standby”) or a discharging state.
  • a charging state electrical energy can be sent from the charging device 2 to energy storage cells 12 that are connected and suitable for a charging process.
  • electrical energy can be received by the energy storage cells 12 for storage in a corresponding energy storage device 27 of the charging device 2 .
  • the energy storage device 27 of the charging device 2 can be designed in the form of a battery cell.
  • the machine tool 3 is then set by its control device 11 from a discharged state to a charged state, so that electrical energy provided by the charging device 2 can be absorbed or stored by the energy storage cells 12 .
  • the characteristic charging value can be a voltage value, an amperage value or a charging power value for the charging process.
  • the voltage value for the charging process can be 21 to 60 volts (V). According to the present embodiment, the voltage value is 48V.
  • the amperage value can be 1 to 10 amps (A) for charging. According to the present embodiment, the current value is 5A.
  • the charging power can be 24 to 600 watts (W) for the charging process. According to the present embodiment, the charging power is 210W.
  • a next method step electrical energy is sent from the charging device 2 to the energy storage cells 12 in accordance with at least one charging parameter requested by the machine tool 3 .
  • the charging characteristics for the connected energy storage cells 12 correspond to a charging voltage of 48 V, a charging current of 5 A and a resulting charging power of 240 W.
  • a further signal is sent from the communication device 16 of the machine tool 3 to the communication device 26 of the loading device 2 in order to set at least one new loading parameter on the loading device 2.
  • the new charging characteristic can be a new charging voltage value, charging current value or charging power.
  • Both the communication device 16 of the machine tool 3 and the communication device 26 of the charging device 2 can be configured wirelessly and in particular using Bluetooth technology.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
EP22159558.0A 2022-03-01 2022-03-01 Machine-outil pourvu d'accumulateur intégré Pending EP4238703A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP22159558.0A EP4238703A1 (fr) 2022-03-01 2022-03-01 Machine-outil pourvu d'accumulateur intégré
PCT/EP2023/054452 WO2023165877A1 (fr) 2022-03-01 2023-02-22 Machine-outil à batterie rechargeable intégrée

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22159558.0A EP4238703A1 (fr) 2022-03-01 2022-03-01 Machine-outil pourvu d'accumulateur intégré

Publications (1)

Publication Number Publication Date
EP4238703A1 true EP4238703A1 (fr) 2023-09-06

Family

ID=80623623

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22159558.0A Pending EP4238703A1 (fr) 2022-03-01 2022-03-01 Machine-outil pourvu d'accumulateur intégré

Country Status (2)

Country Link
EP (1) EP4238703A1 (fr)
WO (1) WO2023165877A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080003505A1 (en) * 2005-02-07 2008-01-03 Steffen Wuensch Electrical Hand-Held Power Tool
US20140008093A1 (en) * 2012-07-06 2014-01-09 Robert Bosch Gmbh Cordless power tool with usb charging

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080003505A1 (en) * 2005-02-07 2008-01-03 Steffen Wuensch Electrical Hand-Held Power Tool
US20140008093A1 (en) * 2012-07-06 2014-01-09 Robert Bosch Gmbh Cordless power tool with usb charging

Also Published As

Publication number Publication date
WO2023165877A1 (fr) 2023-09-07

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