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WO1998038013A1 - Outil equipe d'un ensemble poignee vibrant - Google Patents

Outil equipe d'un ensemble poignee vibrant Download PDF

Info

Publication number
WO1998038013A1
WO1998038013A1 PCT/IE1998/000018 IE9800018W WO9838013A1 WO 1998038013 A1 WO1998038013 A1 WO 1998038013A1 IE 9800018 W IE9800018 W IE 9800018W WO 9838013 A1 WO9838013 A1 WO 9838013A1
Authority
WO
WIPO (PCT)
Prior art keywords
tool
hand grip
vibratable
microcontroller
torque
Prior art date
Application number
PCT/IE1998/000018
Other languages
English (en)
Inventor
Rudi Zellman
Hans Himbert
John Alfred
Erik Conn Jansson
Original Assignee
Uirlis Torc Teoranta
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 Uirlis Torc Teoranta filed Critical Uirlis Torc Teoranta
Priority to AU66332/98A priority Critical patent/AU6633298A/en
Publication of WO1998038013A1 publication Critical patent/WO1998038013A1/fr

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
    • B25B23/142—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers
    • B25B23/1422—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers torque indicators or adjustable torque limiters
    • B25B23/1425—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers torque indicators or adjustable torque limiters by electrical means

Definitions

  • the present invention relates to a tool, in particular, an electronic to " rque wrench, incorporating a vibratable handle assembly.
  • the present invention provides a tool incorporating a vibratable handle assembly, the tool comprising a body having an adaptor to, in use, engage a tool head, a hand grip enabling a user to engage and operate the tool, and sensing means for generating a signal indicative of the state of the tool head, the body further including vibratable means responsive to the sensing means to cause the hand grip to vibrate when the signal reaches a pre-determined threshold value.
  • Fig. 1 is a side view of a torque wrench according to the invention including a vibratable handle assembly
  • Fig. 2 is a plan view of the torque wrench of Fig. 1;
  • Fig. 3 is an exploded view of the hand grip end of the torque wrench of Fig. 1;
  • Fig. 4 is a detailed exploded view looking in the opposite direction to Fig. 3 of a vibrating motor assembly incorporated in the hand grip end of the torque wrench;
  • Fig. 5 is a block diagram of the electronic circuit incorporated in the torque wrench.
  • a torque wrench 10 comprises a hollow generally cylindrical elongate steel tube 11.
  • a generally cylindrical tool head adaptor 12 is dimensioned for a sliding fit into one end 13 of the tube 11, and a generally cylindrical plastics sleeve 60 is dimensioned for a sliding fit over the opposite end 63 of the tube 11 to provide a hand grip.
  • the hand grip 60 is secured to the tube 11 by a grub screw 61, Fig. 3, which passes through respective holes 62A and 62B respectively in the hand grip 60 and tube 1.1.
  • the adaptor 12 is preferably fabricated from steel .
  • the adaptor 12 is held in place within the end of the tube 11 by a pin (not shown) which passes through a hole in the tube into a corresponding hole in the adaptor.
  • the adaptor 12 has a widened neck portion 14 to provide a step and an 0-ring 15 is located over the adaptor to sit against the step, Fig. 1.
  • the 0-ring bears against the end 13 of the tube 11 to prevent over- insertion of the adaptor into the tube 11 and provide a sealed fit between the adaptor 12 and the tube 11.
  • the external diameter of the adaptor 12 narrows to a reduced diameter hollow head 16 on which opposite flat surfaces 17 are formed.
  • Each flat surface 17 incorporates a respective hole 19, Fig. 2.
  • the internal surface of the head 16 is generally rectangular, allowing conventional tool heads, for example, a ratchet 18 to be mounted in the head 16.
  • Sockets of various sizes may, in use, be mounted on the free end 20 of the ratchet 18.
  • the wrench 10 may then be rotated back and forth about the tool head to secure a bolt (not shown) .
  • the applied torque on the tool head increases .
  • Thick Film Resistor strain gauge sensors mounted on the adaptor 12 within the tube 11.
  • the sensors are preferably connected in a Wheatstone Bridge network 100, Fig. 5, and an analog differential signal, generated from the bridge 100, is converted via an analog-to-digital converter (ADC) 102 to a digital signal which in turn is fed to a microcontroller 104.
  • ADC analog-to-digital converter
  • the microcontroller 104 is mounted on a PCB (not shown) located inside a mid-section 21 of the tube 11 behind a panel 22 containing a keypad 130 (Fig. 5), an LCD display 106 and red and green LEDs 108.
  • the panel 22 is mounted over an aperture 50 formed in the side of the mid-section 21 of the tube, Fig. 3.
  • the panel 22 is secured to the tube 11 by a pair of grub screws 51, only one shown.
  • the panel 22 is coupled to the PCB which contains the microcontroller 104 to enable a user to view and adjust, inter alia, a torque threshold value.
  • the microcontroller 104 is programmed to receive and store input from the keypad 130 to adjust the pre-determined threshold value, which is stored in a nonvolatile memory (EEPROM 110) coupled to the microcontroller.
  • EEPROM 110 nonvolatile memory
  • the digital parts of the circuit are powered by a 5V digital power supply 124, and the analog parts of the circuit are powered by an analog power supply 126, both derived from a 9V battery.
  • the LCD display 106 and the LEDs 108 are driven by respective drive circuits 106A, 108A.
  • the torque wrench also includes a buzzer 128 driven by a drive circuit 128A.
  • a reset circuit 112 starts up a program in the microcontroller 104.
  • the microcontroller which controls activities on the circuit, goes through an initialisation routine and waits for a valid reading from the ADC 102.
  • the torque applied to the torque wrench is transformed to a change in resistance in the strain gauge bridge 100. This results in a change in voltage at the bridge outputs which is amplified by a pre-amplifier 114. This is then converted to a binary number for the microcontroller 104 by the ADC 102.
  • the user of the torque wrench may optionally store the displayed reading with time and date in the EEPROM 110 for later retrieval or serial download through an RS232 interface 118 to a computer or serial printer.
  • a real time clock 116 with battery back up 122 keeps track of the time and date.
  • Low battery voltage is detected by a circuit 120 which feeds a voltage to the ADC 102.
  • the microcontroller 104 then turns on a ' lo-bat' symbol on the LCD display 106. If the battery voltage falls below a predetermined level, the torque wrench no longer takes ADC readings and will not work.
  • the microcontroller 104 puts the circuit into a low power or sleep mode to conserve battery power - pressing the ON key 112 wakes it up again.
  • the user selects an operating value of torque, X say, and a tolerance, A say, and enters these into the memory 110 by the keypad 130. This establishes upper and lower threshold values (X-A) and (X+A) respectively.
  • the microcontroller 104 monitors the signal produced by the sensors 100 and compares the signal with the threshold values.
  • the microprocessor 104 is programmed to perform the following sequence of events during increasing torque:
  • the green LED 108 flashes and the buzzer 128 gives an approaching alarm.
  • the approaching alarm is a quickening beeping of the buzzer as the "GO" region, (X-A) to (X+A) , is approached.
  • Steps 2 and 3 are not repeated if the torque falls out of the GO range and then re-enters it, unless the torque falls to less than 10% of X and then starts to increase again.
  • the torque wrench is also provided with means to give a tactile warning to the user, in the present embodiment when the lower threshold value (X-A) is reached.
  • This tactile warning takes the form of a 1/2 second vibration of the handle at step (2) above.
  • the microcontroller 104 is coupled to a motor 24 via a motor drive circuit 24A.
  • the motor 24 is mounted within the end 63 of the tube 11 opposite the tool head, Fig. 3.
  • An example of a suitable miniature D.C. motor is manufactured by Dome Co.
  • the motor 24 has a generally cylindrical housing and is powered via two wires 25 which extend from one end of the motor towards the mid- section 23 of the tube where they connect to the PCB.
  • a motor jig 2"7 comprises a semi-cylindrical body 28 conforming to the internal diameter of the tube 11, Fig. 3.
  • a faceplate 31 is formed on the face of the jig 27 directed away from the mid-section 32. The faceplate 31 extends beyond the edges of the body 28 of the jig to prevent over- insertion of the jig 27 into the tube 11.
  • a pair of radial flanges 29 project from the body 28 of the jig towards the mid-section 23.
  • a seating 28A projects from the side of the flanges 29 opposite the body 28.
  • the motor 24 is mounted parallel to the longitudinal axis of the tube 11 within a semi-cylindrical recess 26 formed in the seating 28, Fig. 4. The total transverse width of the motor/jig assembly is such that it just fits within the tube 11.
  • a shaft 40 projects from the end of the motor 24 opposite the wires 25, Fig. 4.
  • An eccentric member in the form of a semi- cylindrical body 30 is mounted on the shaft 40.
  • the body 30 projects beyond the end 63 of the tube 11 into the hand grip 60.
  • the microcontroller 104 actuates the drive circuit 24A so that the motor 24 is switched on for a pre-determined time, in this embodiment 1/2 second, and the shaft 40, together with the body 30, begins to rotate.
  • the semi-cylindrical cam 30 generates a dynamic imbalance, which in turn generates a tactile vibration in the wrench handle. This is turn causes the handle or hand grip to vibrate and to indicate to the user that the pre-determined lower torque limit has been reached and therefore causing the operator to cease tightening (torquing) and as a result avoiding the bolt or fastener being stressed.
  • the jig 27 also acts as a battery terminal for a battery housed within the hand grip 60.
  • the battery (not shown) of the type with both terminals at the same end, is inserted into the hand grip by removing a stopper 64 which is inserted into the end of the hand grip 60 remote from the tube 11.
  • a pair of reduced thickness seats 52 are defined in the faceplate 31 and accommodate respective electrical spring contacts 53 which bear against the battery terminals when inserted in the hand grip.
  • Each contact 53 is connected via a respective wire 54, which passes on either side of the seating 28, to the PCB to power the microcontroller, its associated circuitry and the strain gauge circuitry.

Landscapes

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

Abstract

On décrit une clé dynamométrique équipée d'un ensemble poignée vibrant. Ledit outil comprend un tube en acier (11) muni, à une extrémité, d'un adaptateur (12) qui se fixe à une tête porte-outil (18) pendant l'utilisation et, à l'autre extrémité, d'une poignée (60) permettant à un utilisateur de prendre en main l'outil et le faire fonctionner. Des moyens de détection logés dans le tube (11) émettent un signal indiquant le couple de serrage sur la tête porte-outil, et un moteur logé dans le tube (11) réagit aux moyens de détection et fait vibrer l'ensemble poignée lorsque le signal atteint une valeur de seuil préétablie.
PCT/IE1998/000018 1997-02-28 1998-03-02 Outil equipe d'un ensemble poignee vibrant WO1998038013A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU66332/98A AU6633298A (en) 1997-02-28 1998-03-02 A tool incorporating a vibratable handle assembly

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IES970129 1997-02-28
IE970129 1997-02-28

Publications (1)

Publication Number Publication Date
WO1998038013A1 true WO1998038013A1 (fr) 1998-09-03

Family

ID=11041388

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IE1998/000018 WO1998038013A1 (fr) 1997-02-28 1998-03-02 Outil equipe d'un ensemble poignee vibrant

Country Status (2)

Country Link
AU (1) AU6633298A (fr)
WO (1) WO1998038013A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2370008A (en) * 2000-12-06 2002-06-19 Hsieh Chih Ching Method of displaying the torque value of a torque applying tool
WO2003041914A3 (fr) * 2001-11-14 2003-11-13 Snap On Tech Inc Cle dynamometrique electronique
FR2959686A1 (fr) * 2010-05-04 2011-11-11 Chih-Ching Hsieh Cle
CN102241006A (zh) * 2010-05-10 2011-11-16 谢智庆 振动扳手
RU2550373C1 (ru) * 2014-03-03 2015-05-10 Закрытое акционерное общество "ИНСТРУМ-РЭНД" Способ измерения крутящего момента затяжки резьбовых соединений и динамометрический ключ для его осуществления
US10625405B2 (en) 2016-09-13 2020-04-21 Milwaukee Electric Tool Corporation Powered ratcheting torque wrench
US11453105B2 (en) 2016-09-13 2022-09-27 Milwaukee Electric Tool Corporation Powered ratcheting torque wrench
DE102019127181B4 (de) 2019-01-24 2024-04-11 Kabo Tool Company Vibrierender Schraubenschlüssel
TWI862320B (zh) * 2023-12-04 2024-11-11 陳怡富 扭力扳手

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4958541A (en) * 1989-10-13 1990-09-25 Snap-On Tools Corporation Electronic torque wrench with tactile indication

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4958541A (en) * 1989-10-13 1990-09-25 Snap-On Tools Corporation Electronic torque wrench with tactile indication

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2370008A (en) * 2000-12-06 2002-06-19 Hsieh Chih Ching Method of displaying the torque value of a torque applying tool
WO2003041914A3 (fr) * 2001-11-14 2003-11-13 Snap On Tech Inc Cle dynamometrique electronique
US6968759B2 (en) 2001-11-14 2005-11-29 Snap-On Incorporated Electronic torque wrench
US6981436B2 (en) 2001-11-14 2006-01-03 Snap-On Incorporated Electronic torque wrench
FR2959686A1 (fr) * 2010-05-04 2011-11-11 Chih-Ching Hsieh Cle
CN102241006B (zh) * 2010-05-10 2013-09-25 谢智庆 振动扳手
CN102241006A (zh) * 2010-05-10 2011-11-16 谢智庆 振动扳手
RU2550373C1 (ru) * 2014-03-03 2015-05-10 Закрытое акционерное общество "ИНСТРУМ-РЭНД" Способ измерения крутящего момента затяжки резьбовых соединений и динамометрический ключ для его осуществления
US10625405B2 (en) 2016-09-13 2020-04-21 Milwaukee Electric Tool Corporation Powered ratcheting torque wrench
US11453105B2 (en) 2016-09-13 2022-09-27 Milwaukee Electric Tool Corporation Powered ratcheting torque wrench
US11766770B2 (en) 2016-09-13 2023-09-26 Milwaukee Electric Tool Corporation Powered ratcheting torque wrench
US12097596B2 (en) 2016-09-13 2024-09-24 Milwaukee Electric Tool Corporation Powered ratcheting torque wrench
DE102019127181B4 (de) 2019-01-24 2024-04-11 Kabo Tool Company Vibrierender Schraubenschlüssel
TWI862320B (zh) * 2023-12-04 2024-11-11 陳怡富 扭力扳手

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Publication number Publication date
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