WO2019206609A1 - Electric power tool for tightening screw joints - Google Patents

Electric power tool for tightening screw joints Download PDF

Info

Publication number
WO2019206609A1
WO2019206609A1 PCT/EP2019/058744 EP2019058744W WO2019206609A1 WO 2019206609 A1 WO2019206609 A1 WO 2019206609A1 EP 2019058744 W EP2019058744 W EP 2019058744W WO 2019206609 A1 WO2019206609 A1 WO 2019206609A1
Authority
WO
WIPO (PCT)
Prior art keywords
electric power
power tool
torgue
transducer
value
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.)
Ceased
Application number
PCT/EP2019/058744
Other languages
English (en)
French (fr)
Inventor
Johan RÖNBLOM
Lisa Erika LARSSON
Göran Sivert Lantz
Taru Johanna NORDSTRÖM
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.)
Atlas Copco Industrial Technique AB
Original Assignee
Atlas Copco Industrial Technique AB
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 Atlas Copco Industrial Technique AB filed Critical Atlas Copco Industrial Technique AB
Priority to KR1020207033388A priority Critical patent/KR102596004B1/ko
Priority to JP2020560126A priority patent/JP7273853B2/ja
Priority to CN201980027931.1A priority patent/CN112020408B/zh
Priority to ES19716880T priority patent/ES3030984T3/es
Priority to US17/050,480 priority patent/US11292111B2/en
Priority to BR112020021684-4A priority patent/BR112020021684B1/pt
Priority to PL19716880.0T priority patent/PL3784441T3/pl
Priority to EP19716880.0A priority patent/EP3784441B1/en
Publication of WO2019206609A1 publication Critical patent/WO2019206609A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B25B23/147—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for electrically operated wrenches or screwdrivers
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
    • B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
    • B23P19/06—Screw or nut setting or loosening machines
    • B23P19/065—Arrangements for torque limiters or torque indicators in screw or nut setting machines
    • B23P19/066—Arrangements for torque limiters or torque indicators in screw or nut setting machines by electrical means
    • 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
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B25B21/001—Combined nut setting and crimping
    • 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
    • B25F5/001—Gearings, speed selectors, clutches or the like specially adapted for rotary tools

Definitions

  • the present disclosure relates to an electric power tool for
  • a difficulty related to the monitoring of a delivered torque is that there are losses due to friction in the joint and due to gear ripple and the like inside the tool that affects the accuracy of the
  • the friction in a joint may vary largely between different joints, but it may be presumed to be constant for a specific joint at specific conditions, and there are manners of estimating the friction for a specific joint, both by empiric testing or by real time monitoring during the tightening of a j oint .
  • An object of the invention is to provide an electric power tool for delivering a precise output torque with less variations due to gear ripple and the like.
  • This object is achieved according to an exemplary embodiments of the present disclosure where the housing of the electric power tool encloses both a back torque transducer and a front torque transducer.
  • the back torque transducer is provided on one side of the angle gear.
  • the front torque transducer is provided on the other side of the angel gear.
  • the housing encloses an electric motor and an angle gear comprising an input bevel gear drivingly connected to the electric motor and an output bevel gear drivingly connected to an output shaft of the electric power tool.
  • the housing further encloses a back torgue transducer arranged to measure a back torgue reaction value before the input bevel gear.
  • the electric power tool further comprise a front torgue transducer arranged to measure a front torgue reaction value after the output bevel gear.
  • Fig. 1 is a schematic view of an electric power tool 10 according to a specific embodiment of the invention. Detailed description of the shown embodiment of the invention
  • the electric power tool 10 comprises a housing 11.
  • the housing 11 encloses an electric motor 12.
  • the housing 11 further encloses an angle gear 17 comprising a input bevel gear 17a drivingly connected to the electric motor 12 and a output bevel gear 17b drivingly connected to an output shaft 16 of the electric power tool 10.
  • the housing 11 yet further encloses a back torgue transducer 20 arranged to measure a back torgue reaction value before the input bevel gear 17a. Stated differently, in one
  • the back torgue transducer 20 is arranged to measure the back torgue reaction value between the motor 12 and the the input bevel gear 17a. Also enclosed by the housing 11 is a front torgue transducer 21 arranged to measure a front torgue reaction value after the output bevel gear 17b. Stated differently, in one embodiment, the front torgue transducer 21 is arranged to measure the front torgue reaction value that is tranfered from the output bevel gear 17b.
  • a general idea according to exemplary embodiments of the present disclosure is to provide an electric power tool 10 were both the back torgue transducer 20 and the front torgue transducer 21 are enclosed in the housing 11.
  • One advantage is that the electric power tool 10 can be made handheld since all the parts are encloses in the housing.
  • housing 11 Another advantage by having all the elements enclosed in that housing 11 is easier installation and logistics since all the parts are enclosed in the housing 11.
  • the back torgue transducer 20 is provided on the back side of the angle gear 17.
  • the front torgue transducer 21 is provided on the front side of the angel gear 17.
  • the housing 11 of the electric power tool 10 is shaped to be ergonomic to hold for an operator.
  • An advantage with this embodiment is that the electric power tool 10 becomes more ergonomic. The risk for injuries of the operator is thereby reduced.
  • the front torgue transducer 21 comprises a front torgue transferring element (not shown) arranged to transfer reaction torgue to the housing 11 and carrying front strain measuring sensors (not shown) arranged to generate a front torgue transducer value.
  • the back torgue transducer 20 comprises a back torgue transferring element (not shown) arranged to transfer back reaction torgue to the housing 11 and carrying back strain measuring sensors (not shown) arranged to generate a back torgue transducer value.
  • the electric power tool 10 comprises a back amplifier arranged to amplify the back torgue transducer value and arranged close to the back strain
  • the electric power tool 10 further comprises a front amplifier arranged to amplify the front torgue transducer value and arranged close to the front strain measuring sensors.
  • the electric power tool 10 is further operative to terminate a tightening when the front torgue transducer value and the back torgue transducer value exceeds a torgue difference limit, where the torgue difference limit is the difference between the front torgue transducer value and the back torgue transducer value .
  • the electric power tool 10 is further operative to retrieve the torgue difference limit.
  • the present disclosure further relates to an electric power tool controller (not shown) configured to control the electric power tool 10 according to any of the described exemplary embodiments.
  • the electric power tool controller is operative to control a tightening performed by the electric power tool 10 based on the front torgue transducer value or the back torgue transducer value and monitor the tightening based on the front torgue transducer value or the back torgue
  • the electric power tool controller is further operative to terminate a tightening when the front torgue transducer value and the back torgue transducer value exceeds a torgue difference limit, where the torgue difference limit is the difference between the front torgue transducer value and the back torgue transducer value .
  • the electric power tool controller is further operative to retrieve the torgue difference limit.
  • the electric power tool further comprises the electric power tool controller according to any of the described embodiments .
  • the present disclosure also relates to a computer readable storage medium comprising a computer program which when run in the electric power tool controller causes the electric power tool controller to be operative according to any of the described embodiments .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
PCT/EP2019/058744 2018-04-26 2019-04-08 Electric power tool for tightening screw joints Ceased WO2019206609A1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
KR1020207033388A KR102596004B1 (ko) 2018-04-26 2019-04-08 나사 조인트를 조이기 위한 전기 동력 공구
JP2020560126A JP7273853B2 (ja) 2018-04-26 2019-04-08 ねじ継ぎ手を締め付けるための電動工具
CN201980027931.1A CN112020408B (zh) 2018-04-26 2019-04-08 用于拧紧螺纹接头的电动工具
ES19716880T ES3030984T3 (en) 2018-04-26 2019-04-08 Electric power tool for tightening screw joints
US17/050,480 US11292111B2 (en) 2018-04-26 2019-04-08 Electric power tool for tightening screw joints
BR112020021684-4A BR112020021684B1 (pt) 2018-04-26 2019-04-08 Ferramenta elétrica para apertar juntas de parafusos
PL19716880.0T PL3784441T3 (pl) 2018-04-26 2019-04-08 Elektronarzędzie do dokręcania połączeń śrubowych
EP19716880.0A EP3784441B1 (en) 2018-04-26 2019-04-08 Electric power tool for tightening screw joints

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1830145-7 2018-04-26
SE1830145A SE542008C2 (en) 2018-04-26 2018-04-26 Electric power tool for tightening screw joints

Publications (1)

Publication Number Publication Date
WO2019206609A1 true WO2019206609A1 (en) 2019-10-31

Family

ID=66102708

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/058744 Ceased WO2019206609A1 (en) 2018-04-26 2019-04-08 Electric power tool for tightening screw joints

Country Status (9)

Country Link
US (1) US11292111B2 (enExample)
EP (1) EP3784441B1 (enExample)
JP (1) JP7273853B2 (enExample)
KR (1) KR102596004B1 (enExample)
CN (1) CN112020408B (enExample)
ES (1) ES3030984T3 (enExample)
PL (1) PL3784441T3 (enExample)
SE (1) SE542008C2 (enExample)
WO (1) WO2019206609A1 (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111890021A (zh) * 2020-07-31 2020-11-06 杭州庚复科技有限公司 一种基于斜齿轮传动的计算机硬盘螺钉紧固装置
EP4029651A1 (de) * 2021-01-18 2022-07-20 Johannes Lübbering GmbH Schraubvorrichtung mit winkelgetriebe und integrierten drehmomenterfassungsmitteln

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0092736A1 (de) * 1982-04-22 1983-11-02 Robert Bosch Gmbh Messwertgeber für Drehmoment- und/oder Drehwinkelmessung, insbesondere an motorgetriebenen Schraubern
EP0164574A2 (de) * 1984-05-15 1985-12-18 Deutsche Gardner-Denver GmbH & Co Schrauber
WO2015097093A1 (en) * 2013-12-27 2015-07-02 Atlas Copco Industrial Technique Ab Power tool
WO2016156388A1 (en) * 2015-04-02 2016-10-06 Atlas Copco Industrial Technique Ab Power tool with output torque compensation and method therefore

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3667658B2 (ja) 2001-05-22 2005-07-06 三洋機工株式会社 ねじ締付装置
GB2383282B (en) * 2002-04-02 2004-06-16 Crane Electronics Torque sensing tool
SE534852C2 (sv) * 2007-07-05 2012-01-24 Atlas Copco Tools Ab Momentavkännande enhet för ett kraftverktyg
CN201799979U (zh) * 2010-05-21 2011-04-20 浙江大学 一种具有磁力过载保护器的电动螺丝刀
JP6028149B2 (ja) 2012-09-13 2016-11-16 株式会社ユタニ 締付工具
JP6322387B2 (ja) 2013-11-05 2018-05-09 Ｔｏｎｅ株式会社 締付装置及び締付方法
JP6395075B2 (ja) 2014-03-31 2018-09-26 パナソニックＩｐマネジメント株式会社 インパクト工具用アタッチメント及びインパクト工具
JP6748868B2 (ja) 2014-12-26 2020-09-02 パナソニックＩｐマネジメント株式会社 インパクト回転工具
SE539469C2 (en) 2015-01-21 2017-09-26 Atlas Copco Ind Technique Ab Method for determining the magnitude of the output torque and a power wrench
SE541857C2 (en) 2018-04-19 2019-12-27 Atlas Copco Ind Technique Ab A constant-velocity joint assembly and a power tool comprising the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0092736A1 (de) * 1982-04-22 1983-11-02 Robert Bosch Gmbh Messwertgeber für Drehmoment- und/oder Drehwinkelmessung, insbesondere an motorgetriebenen Schraubern
EP0164574A2 (de) * 1984-05-15 1985-12-18 Deutsche Gardner-Denver GmbH & Co Schrauber
WO2015097093A1 (en) * 2013-12-27 2015-07-02 Atlas Copco Industrial Technique Ab Power tool
WO2016156388A1 (en) * 2015-04-02 2016-10-06 Atlas Copco Industrial Technique Ab Power tool with output torque compensation and method therefore

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111890021A (zh) * 2020-07-31 2020-11-06 杭州庚复科技有限公司 一种基于斜齿轮传动的计算机硬盘螺钉紧固装置
EP4029651A1 (de) * 2021-01-18 2022-07-20 Johannes Lübbering GmbH Schraubvorrichtung mit winkelgetriebe und integrierten drehmomenterfassungsmitteln

Also Published As

Publication number Publication date
BR112020021684A2 (pt) 2021-01-26
CN112020408B (zh) 2022-04-05
ES3030984T3 (en) 2025-07-03
US20210129301A1 (en) 2021-05-06
CN112020408A (zh) 2020-12-01
JP2021522076A (ja) 2021-08-30
PL3784441T3 (pl) 2025-08-11
JP7273853B2 (ja) 2023-05-15
KR102596004B1 (ko) 2023-11-01
SE1830145A1 (en) 2019-10-27
US11292111B2 (en) 2022-04-05
EP3784441B1 (en) 2025-04-02
KR20210005899A (ko) 2021-01-15
EP3784441A1 (en) 2021-03-03
SE542008C2 (en) 2020-02-11

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