EP4190490A1 - Machine-outil d'une masse puissancique spécifique - Google Patents

Machine-outil d'une masse puissancique spécifique Download PDF

Info

Publication number
EP4190490A1
EP4190490A1 EP21211568.7A EP21211568A EP4190490A1 EP 4190490 A1 EP4190490 A1 EP 4190490A1 EP 21211568 A EP21211568 A EP 21211568A EP 4190490 A1 EP4190490 A1 EP 4190490A1
Authority
EP
European Patent Office
Prior art keywords
machine tool
range
motor
supply device
power
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Withdrawn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
EP21211568.7A
Other languages
German (de)
English (en)
Inventor
Ralf Greitmann
John Van Taack-Trakranen
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 EP21211568.7A priority Critical patent/EP4190490A1/fr
Publication of EP4190490A1 publication Critical patent/EP4190490A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B24B23/028—Angle tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B27/00—Other grinding machines or devices
    • B24B27/06—Grinders for cutting-off
    • B24B27/08—Grinders for cutting-off being portable
    • 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 with a motor, a power-to-weight ratio L of the machine tool being able to be determined by a quotient of an output power of the motor and a mass of the machine tool.
  • the power-to-weight ratio of the machine tool is in a range greater than or equal to 0.30 kW/kg.
  • the machine tool can have a power supply device, with a ratio of the mass of the power supply device of the machine tool and the output power of the motor of the machine tool being in a range of less than or equal to 0.60 kg/kW.
  • cut-off grinders are known in the field of machine tools, with which a substrate can be machined or cut. Such cut-off machines usually have a petrol engine or an internal combustion engine in order to generate the power required to carry out the work.
  • Such petrol-powered angle grinders or cutting devices are increasingly undesirable for ecological reasons, on the one hand because of the energy consumption, on the other hand because of the possible health impairments for the user, for example due to exhaust gases and the pollutants contained therein.
  • a disadvantage of such battery-operated cut-off machines can be the high overall weight of the device, which is caused, among other things, by the weight of the batteries or rechargeable batteries. As a result, working with the device can be perceived by a user as being very physically demanding.
  • the object underlying the present invention is to overcome the shortcomings and disadvantages of the prior art described above and to provide a machine tool which, on the one hand, makes it possible to carry out work for which high power is required, and, on the other hand, so handy and light is that a user can work with the machine tool for a longer period of time without any hindrance or stress.
  • a machine tool with a motor with a power-to-weight ratio L of the machine tool being able to be defined by a quotient of an output power P of the motor and a mass M1 of the machine tool.
  • the machine tool is characterized in that the power-to-weight ratio L of the machine tool is in a range greater than or equal to 0.30 kW/kg.
  • L P/M1.
  • a machine tool which has a power-to-weight ratio L of greater than or equal to 0.30 kW/kg.
  • power-to-weight ratios for machine tools had not been considered feasible by experts, particularly when the machine tool is a battery or accumulator-operated machine tool.
  • the proposed machine tool advantageously combines a high power output P of the motor of the machine tool with a surprisingly low mass M1 of the machine tool, so that the invention enables a quotient of these variables in a range greater than or equal to 0.30 kW/kg.
  • the invention thus turns away from the state of the art, which had not considered such high power-to-weight ratios to be possible.
  • the power-to-weight ratio L as the quotient of output power and mass of the machine tool can be 0.33 kW/kg, for example.
  • the machine tool has an energy supply device, it being possible for the energy supply device of the machine tool to comprise one accumulator, two accumulators or more accumulators.
  • the mass M1 describes the total weight of the machine tool.
  • the total weight of the machine tool corresponds to the weight of the machine tool in an operational configuration, ie in a configuration in which the machine tool can be operated.
  • the machine tool includes in particular the energy supply device, ie batteries or accumulators, and a tool, which is described further below.
  • the Mass M1 of the machine tool represents the total weight of the machine tool and its components without tools and energy supply device.
  • the mass M1 thus represents in particular the mass of the machine tool without, for example, a separating or cutting disk and without a rechargeable battery or battery.
  • a mass M2 of the energy supply device is in a range from 0.8 to 2 kg, preferably in a range from 1.2 to 1.5 kg and most preferably around 1.25 kg.
  • the mass M2 or the weight of the batteries and/or accumulators that form the energy supply device can be, for example, in a range from 0.8 to 2 kg, preferably in a range from 1.2 to 1.5 kg and most preferably at about 1.25 kg.
  • the weight M2 of the energy supply device is 1.26 kg.
  • the term “mass of the energy supply device” is preferably used as the mass or weight of the cells of the energy supply device.
  • the mass M2 of the energy supply device corresponds to the total weight of the cells of the accumulators of the energy supply device.
  • the weight M2 of the energy supply device can result, for example, as a product of the masses of the individual cells and the number of cells in the energy supply device.
  • the ratio K of the mass M2 of the energy supply device of the machine tool and the power output P of the motor of the machine tool can be in a range of less than or equal to 0.45 kg/kW.
  • This ratio K expresses the surprisingly high delivery or output power of the machine tool or its motor in relation to a mass feature of the machine tool. Consequently, with the proposed machine tool, a particularly high power density can be provided in relation to the weight of the energy supply device or the machine tool itself.
  • this preferably means that, considering the size and weight of the energy supply device or the machine tool, a particularly powerful machine tool can be provided with which difficult and power-intensive cutting and cutting work can advantageously also be carried out.
  • the machine tool provided with the invention is surprisingly light and the user can work with the machine tool for a particularly long service life without physical impairments. Due to the low weight of the Accumulators, the handling of the proposed machine tool is particularly advantageous and convenient.
  • the volume of the power supply device of the machine tool is less than or equal to 0.5 l.
  • the volume of the energy supply device can be 0.47 l. In this way, a particularly compact and handy machine tool can be provided, which further facilitates working with the proposed machine tool.
  • an accumulator of the power supply device has a nominal voltage in a range from 20 to 25 V, preferably in a range from 21 to 23 V, and most preferably in a range from 21.5 to 22 V.
  • the power supply device of the machine tool can, for example, or two accumulators, with more than two accumulators being conceivable. It is preferred within the meaning of the invention that each accumulator of the energy supply device has a rated voltage in a preferred range of 21.5 to 22 V. If the power supply device of the machine tool has two rechargeable batteries, for example, the total voltage of the power supply device is in a range of 43 to 44 V, this voltage value preferably representing the sum of the individual voltages of the individual rechargeable batteries.
  • the motor of the machine tool is a brushless motor.
  • the motor of the machine tool can be a brushless electric motor.
  • the motor preferably has an overall length of 40 mm.
  • the motor may have an outside diameter in a range greater than or equal to 75 mm.
  • an output power P of the motor of the machine tool is in a range from 2 to 4 kW, preferably in a range from 2.5 to 3.3 kW and most preferably around 2.8 kW.
  • the surprisingly high power output P of the motor of the proposed machine tool is preferably due to the motor parameters mentioned.
  • a brushless motor is advantageously used, which is designed to be particularly compact and has a high utilization of space or volume.
  • the efficiency of the machine tool is in a range of greater than or equal to 0.7, preferably in a range of greater than or equal to 0.7 equal to 0.75.
  • the term "efficiency of the machine tool” preferably describes the efficiency of the drive system of the machine tool, with the drive system of the machine tool preferably comprising electronics and the motor of the machine tool.
  • the efficiency of the drive system of the machine tool is therefore preferably in a range of greater than or equal to 0.70, preferably in a range of greater than or equal to 0.75.
  • the efficiency preferably represents the quotient of the input power of the motor of the machine tool and the output power of the motor of the machine tool.
  • the input power of the motor of the machine tool can be, for example, in a range of 2.5 to 4 kW, preferably in a range of 3 to 3.5 kW and most preferably around 3.3 kW.
  • the machine tool is an angle grinder, a cut-off grinder or a cutting device.
  • the invention represents a hand-held power tool that can preferably be battery-operated.
  • the machine tool has in particular a disk-shaped tool, with a diameter of the disk-shaped tool being in a range from 250 to 450 mm, preferably in a range from 270 to 400 mm, more preferably in a range from 290 to 350 mm and most preferably at about 300mm.
  • a diameter of the disk-shaped tool is greater than or equal to 300 mm. Separating or cutting work can be carried out particularly effectively and easily on these.
  • a mass M1 of the machine tool is in a range from 6 to 12 kg, preferably in a range from 8 to 10 kg, more preferably in a range from 8.3 to 9 kg and most preferably in a range less than or equal to 8.6 kg.
  • a total weight of the machine tool of about 8.6 kg or less represents a very low total weight for a cut-off machine, especially when the weight of the energy supply device and the tool is included. It is preferred within the meaning of the invention that the surprisingly low weight of the machine tool is achieved through the use of materials such as aluminum and/or high-strength plastic.
  • the machine tool includes a lightweight frame construction.
  • figure 1 shows a preferred embodiment of the proposed machine tool 1.
  • a power cutter 1 comprising a motor 2.
  • the motor 2 can be arranged between a cutting arm and a power supply device 3 .
  • it can be a brushless electric motor, with the motor 2 having an outer diameter of greater than or equal to 75 mm, for example.
  • the energy supply device 3 can comprise one, two or more accumulators, in which case the accumulator or accumulators can be inserted into a receiving or battery compartment on a rear side of the machine tool 1 .
  • a total weight M2 of the energy supply device 3 can be 1.26 kg, for example, while the weight of the machine tool 1 can be in a range of 8.6 kg or less. It is preferred within the meaning of the invention that the energy supply device 3 with the rechargeable batteries is located in a rear area of the machine tool 1, in particular in spatial proximity to an underside of the main body of the machine tool 1.
  • a tool 4 can be provided on the cutting arm of the machine tool 1, which tool can preferably be designed in the shape of a disk. It can preferably be a separating or cutting blade. According to the invention, it is preferred that the tool 4 has a diameter of 300 mm.
  • the motor 2 of the machine tool 1 is preferably designed in such a way that the motor 2 can provide an input power of, for example, 3.3 kW and an output power P of approximately 2.8 kW.
  • the power-to-weight ratio L P/M1 of the in figure 1
  • the machine tool 1 illustrated is in a range greater than or equal to 0.30 kW/kg, the power-to-weight ratio L being formed by a quotient of the power output P of the motor 2 and the mass M1 of the machine tool 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling And Boring (AREA)
EP21211568.7A 2021-12-01 2021-12-01 Machine-outil d'une masse puissancique spécifique Withdrawn EP4190490A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21211568.7A EP4190490A1 (fr) 2021-12-01 2021-12-01 Machine-outil d'une masse puissancique spécifique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21211568.7A EP4190490A1 (fr) 2021-12-01 2021-12-01 Machine-outil d'une masse puissancique spécifique

Publications (1)

Publication Number Publication Date
EP4190490A1 true EP4190490A1 (fr) 2023-06-07

Family

ID=78820326

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21211568.7A Withdrawn EP4190490A1 (fr) 2021-12-01 2021-12-01 Machine-outil d'une masse puissancique spécifique

Country Status (1)

Country Link
EP (1) EP4190490A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014215045A1 (de) * 2014-07-31 2016-02-04 Robert Bosch Gmbh Hochleistungshandwerkzeugmaschine
WO2019006452A2 (fr) * 2017-06-30 2019-01-03 Milwaukee Electric Tool Corporation Système alimenté par batterie haute puissance
DE102018215646A1 (de) * 2018-09-14 2020-03-19 Robert Bosch Gmbh Elektromaschine
DE202019103132U1 (de) * 2019-06-04 2020-09-07 Robel Bahnbaumaschinen Gmbh Trennschleifgerät zum Durchtrennen einer Schiene eines Gleises
CN213195912U (zh) * 2020-08-05 2021-05-14 苏州宝时得电动工具有限公司 切割工具

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014215045A1 (de) * 2014-07-31 2016-02-04 Robert Bosch Gmbh Hochleistungshandwerkzeugmaschine
WO2019006452A2 (fr) * 2017-06-30 2019-01-03 Milwaukee Electric Tool Corporation Système alimenté par batterie haute puissance
DE102018215646A1 (de) * 2018-09-14 2020-03-19 Robert Bosch Gmbh Elektromaschine
DE202019103132U1 (de) * 2019-06-04 2020-09-07 Robel Bahnbaumaschinen Gmbh Trennschleifgerät zum Durchtrennen einer Schiene eines Gleises
CN213195912U (zh) * 2020-08-05 2021-05-14 苏州宝时得电动工具有限公司 切割工具

Similar Documents

Publication Publication Date Title
DE102015201574A1 (de) Akkuvorrichtung
DE112013007758B3 (de) Handgehaltene elektrische Schneidvorrichtung
DE202013012584U1 (de) Handgehaltenes elektrisches Schleifwerkzeug
EP3733352A1 (fr) Dispositif de protection pour un appareil-outil ainsi que système comprenant un dispositif de protection et un appareil-outil
DE102014215045A1 (de) Hochleistungshandwerkzeugmaschine
DE102019220475A1 (de) Elektrisches Bearbeitungsgerät mit einer Energieversorgungsvorrichtung
EP2535149A2 (fr) Outil de travail électrique avec une machine électrique, en particulier un outil électrique portatif
EP4190490A1 (fr) Machine-outil d'une masse puissancique spécifique
EP4190503A1 (fr) Machine-outil à courant de débit spécifique
WO2000018546A1 (fr) Systeme d'alimentation en energie d'un appareil portatif electrique
DE202013100852U1 (de) Handgehaltenes Werkzeug
DE102018215646A1 (de) Elektromaschine
EP3379594A1 (fr) Dispositif d'accumulation de l'énergie et/ou d'émission de l'énergie
DE212020000775U1 (de) Elektrowerkzeug und zugehörige Energiespeichervorrichtung
EP3269032B1 (fr) Batterie d'outil portatif, outil portatif connecté au réseau d'alimentation et système d'outil
EP4191721A1 (fr) Accumulateur à performance améliorée de refroidissement, bloc d'accumulateur et machine-outil
DE10206485A1 (de) Stromversorgungseinrichtung und Elektrogerät
DE102017204700A1 (de) Energieversorgungsbereich eines Elektrowerkzeugs sowie Elektrowerkzeug
WO2023099068A1 (fr) Machine-outil pour l'usinage de rails de voie ferrée
EP4191756A1 (fr) Dispositif d'alimentation en énergie doté d'un élément sans soupape de surcharge et machine-outil dotée d'un tel dispositif d'alimentation en énergie
DE202023106086U1 (de) Hochleistungs-Sägekette
DE102021214995A1 (de) Elektrisches Gerät mit einer Mehrzahl elektromechanischer Akkuschnittstellen
WO2024003000A1 (fr) Dispositif de machine-outil, machine-outil, et système de machine-outil
EP4191722A1 (fr) Dispositif d'alimentation en énergie et machine-outil doté d'un tel dispositif d'alimentation en énergie
EP4210195A1 (fr) Dispositif d'alimentation électrique pourvu d'au moins un élément séparant le courant

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20231208