SE8902101D0 - POWER WRENCH FOR TIGHTENING SCREW JOINTS - Google Patents

POWER WRENCH FOR TIGHTENING SCREW JOINTS

Info

Publication number
SE8902101D0
SE8902101D0 SE8902101A SE8902101A SE8902101D0 SE 8902101 D0 SE8902101 D0 SE 8902101D0 SE 8902101 A SE8902101 A SE 8902101A SE 8902101 A SE8902101 A SE 8902101A SE 8902101 D0 SE8902101 D0 SE 8902101D0
Authority
SE
Sweden
Prior art keywords
rotor
tightening
power
screw joints
motor rotor
Prior art date
Application number
SE8902101A
Other languages
Swedish (sv)
Other versions
SE8902101L (en
Inventor
G C Hansson
Original Assignee
Atlas Copco 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 Ab filed Critical Atlas Copco Ab
Priority to SE8902101A priority Critical patent/SE8902101L/en
Publication of SE8902101D0 publication Critical patent/SE8902101D0/en
Priority to DE1990621647 priority patent/DE69021647T2/en
Priority to EP19900850234 priority patent/EP0403460B1/en
Priority to JP2151754A priority patent/JP2824125B2/en
Publication of SE8902101L publication Critical patent/SE8902101L/en
Priority to US07/789,428 priority patent/US5155421A/en

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
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B25B21/008—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose with automatic change-over from high speed-low torque mode to low speed-high torque mode

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Abstract

A power wrench for two-step tightening of screw joints, comprising a housing (13), an electric motor (10) including a rotor (25), an output shaft (24) coupled to the rotor (25), and a power supply means including a power converter (11) with a variable frequency and voltage output and a current responsive power shut-off means. A retardation responsive inertia means (28) is coupled to the motor rotor (25) via a spring (32) and a cam means (29, 30) for corotation with the motor rotor (25) and for activation of a switch (12) as a certain predetermined retardation magnitude in the motor rotor (25) is exceeded. The latter is used for obtaining a fast torque interruption of the initial tightening step of the two-step tightening process, whereas the final tightening step is discontinued automatically as a predetermined current magnitude in the power supply is reached.
SE8902101A 1989-06-12 1989-06-12 NUT BEARING FOR TIGHTENING SCREW TAPE SE8902101L (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
SE8902101A SE8902101L (en) 1989-06-12 1989-06-12 NUT BEARING FOR TIGHTENING SCREW TAPE
DE1990621647 DE69021647T2 (en) 1989-06-12 1990-06-11 Motor wrench for tightening screw connections.
EP19900850234 EP0403460B1 (en) 1989-06-12 1990-06-11 Power wrench for tightening screw joints
JP2151754A JP2824125B2 (en) 1989-06-12 1990-06-12 Power wrench
US07/789,428 US5155421A (en) 1989-06-12 1991-11-05 Power wrench for tightening screw joints

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8902101A SE8902101L (en) 1989-06-12 1989-06-12 NUT BEARING FOR TIGHTENING SCREW TAPE

Publications (2)

Publication Number Publication Date
SE8902101D0 true SE8902101D0 (en) 1989-06-12
SE8902101L SE8902101L (en) 1990-12-13

Family

ID=20376244

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8902101A SE8902101L (en) 1989-06-12 1989-06-12 NUT BEARING FOR TIGHTENING SCREW TAPE

Country Status (4)

Country Link
EP (1) EP0403460B1 (en)
JP (1) JP2824125B2 (en)
DE (1) DE69021647T2 (en)
SE (1) SE8902101L (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59605901D1 (en) * 1995-03-24 2000-10-26 Marquardt Gmbh Method and circuit arrangement for operating an electric motor
DE29816673U1 (en) * 1998-09-17 1999-10-21 Atlas Copco Electric Tools Hand-held tool
WO2015018555A1 (en) * 2013-08-08 2015-02-12 Atlas Copco Industrial Technique Ab Power tool with flywheel and gear for accelerating said flywheel
US10099351B2 (en) * 2013-08-08 2018-10-16 Atlas Copco Industrial Technique Ab Torque delivering power tool with flywheel

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2768546A (en) * 1954-04-26 1956-10-30 Chicago Pneumatic Tool Co Torque control for impact wrenches
JPS4521198Y1 (en) * 1966-10-03 1970-08-24
SE348395B (en) * 1969-07-07 1972-09-04 Saab Scania Ab
SE461510B (en) * 1986-11-27 1990-02-26 Atlas Copco Ab ACTIVATION ARRANGEMENTS FOR ELECTRIC SCREW CARRIER
JPH01127280A (en) * 1987-11-10 1989-05-19 Matsushita Electric Ind Co Ltd Screw driver

Also Published As

Publication number Publication date
DE69021647T2 (en) 1996-05-02
EP0403460B1 (en) 1995-08-16
JPH04176574A (en) 1992-06-24
EP0403460A1 (en) 1990-12-19
DE69021647D1 (en) 1995-09-21
JP2824125B2 (en) 1998-11-11
SE8902101L (en) 1990-12-13

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