EP0845331A1 - Drehmomentschlüssel - Google Patents

Drehmomentschlüssel Download PDF

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Publication number
EP0845331A1
EP0845331A1 EP97402759A EP97402759A EP0845331A1 EP 0845331 A1 EP0845331 A1 EP 0845331A1 EP 97402759 A EP97402759 A EP 97402759A EP 97402759 A EP97402759 A EP 97402759A EP 0845331 A1 EP0845331 A1 EP 0845331A1
Authority
EP
European Patent Office
Prior art keywords
pusher
torque wrench
track
wrench according
head
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.)
Granted
Application number
EP97402759A
Other languages
English (en)
French (fr)
Other versions
EP0845331B1 (de
Inventor
René Michel Fravallo
Ludovic Henri Georges Regnier
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.)
Facom SA
Original Assignee
Facom SA
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 Facom SA filed Critical Facom SA
Publication of EP0845331A1 publication Critical patent/EP0845331A1/de
Application granted granted Critical
Publication of EP0845331B1 publication Critical patent/EP0845331B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B25B23/1427—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 mechanical means

Definitions

  • the present invention relates to a key dynamometer of the type comprising an external body of elongated shape in which the head of the key is articulated around a pivot; an axially movable pusher in the external body and urged towards the head by a tared spring; at least a first rolling element intended reduce friction during movement of the pusher, this rolling element comprising a peripheral surface which rolls on a first track secured to the body outside and which is pressed against this track when the application of the couple; and a transmission organ of effort interposed between the front end of the pusher and the back end of the head.
  • the invention applies to so-called "keys”. break, “in which, when a couple applied predetermined is reached, the outer body shifts angularly, relative to the head, at a relatively angle important and visible. It also applies to the so-called “trigger” keys, in which, in the same conditions, the external body only shifts from a small angle, the user being essentially warned by a shock between two metal parts that the maximum torque is reached.
  • rolling elements are extended rollers by axes, which are received in housings (holes or grooves) of the pusher. This results in a substantial friction between these axes and their housings when the pusher moves, which affects accuracy tripping torque.
  • the object of the invention is to provide economical increased precision and reproducibility tripping torque.
  • the invention relates to a key dynamometer of the aforementioned type, characterized in that the rolling element is a cylindrical log whose peripheral surface also rolls on a second track provided on the pusher, and in that each track is flat.
  • the key in Figures 1 to 5 includes essentially a head 1, a tubular outer body 2 with circular section, a pusher 3, a spring helical tared 4 and an adjustment mechanism 5.
  • the assembly of the tool has a general axis X-X.
  • Head 1 is a part which includes a block before 6, an intermediate articulation zone 7 and a rear tail 8.
  • Block 6 presents, from its front end, a blind bore 9, in which fits and attaches an actuator 10.
  • This last one is typically a reversible ratchet head by overturning, provided with a drive square 11 on which fits a screw socket (not shown).
  • Zone 7 of head 1 spins on a pivot 12 which crosses diametrically the body 2 and is united.
  • the rear end of the tail 8 is forked and carries a cylindrical roller 13 which pivots on a pivot 14 parallel to pivot 12.
  • pivot 12 is horizontal, as shown in Figure 2, as well as the general axis X-X. This corresponds to the actuation of a screw or nut (not shown) with horizontal axis.
  • the tightening of this threaded member takes place in lowering the right end of the body 2, following the arrow F in Figure 2.
  • a generally tubular slide 15 is fixed in an intermediate zone of the body 2.
  • This slide defines a flat, horizontal top track 16 and a flat, horizontal lower track 17 (Figure 3).
  • These two tracks which have, in this example, the same width L, are symmetrical with respect to the plane vertical median P and are delimited laterally by sides 116, 117, respectively, parallel to the plane P.
  • the slide also defines two side faces 18 opposite, also parallel to the plane P.
  • a handle 19 made of plastic.
  • the pusher 3 has a generally cylindrical section suitable for sliding with play in the slide 15.
  • a recess forms a track upper 20 flat and horizontal, parallel to the pivots 12 and 14.
  • the pusher has a second recess which defines a second flat and horizontal track 21 parallel to the first.
  • Runway 20 is opposite track 16 of the slide, and track 21 is next to runway 17.
  • a front cylindrical log 22 is interposed between tracks 16 and 20, and a cylindrical log rear 23 is interposed between tracks 17 and 21.
  • the two logs have the same diameter. Of plus, they are of length L, so as to be guided between the sides 116, 117 of the two tracks.
  • the pusher At its rear end, just behind the track 21, the pusher has a curved spherical zone 24, which ( Figure 3) is in contact by two points diametrically opposed 25 with the side faces 18 of the slide.
  • the pusher At its front end, the pusher has a cam with horizontal and transverse generators, formed of two successive ramps 26 and 27.
  • the ramp lower 26 has a relatively small slope, for example of the order of 35 °, while the upper ramp 27 has a markedly steeper slope, for example around 70 °. These slopes are measured relative to the X-X axis.
  • the two ramps are connected by a rounding 28 which tangentially connects to it and whose center is about halfway down runway 20 and at level, in the radial direction, of the center of the log 22.
  • the rear face of pusher 3 is vertical and is hollowed out with a central conical recess 29.
  • a ball 30 is supported in this recess and in a recess conical 31, located opposite, provided in the front face a tip 32 secured to the front end of the spring 4.
  • a similar ball tip assembly 33 is provided at the rear end of spring 4, and on the ball is supported by a vertical plate 34 which is part of the adjustment mechanism 5.
  • the latter is conventional and includes a screw-nut system whose screw 35 is actuated by a hexagon 35A.
  • the tripping torque thus adjusted is displayed on an appropriate scale of visible body 2 through a window 36 of the handle 19, as shown schematically in Figure 1.
  • each log 22, 23 is located near the end rear of associated runway 20, 21.
  • the reaction R constantly passes in the vicinity of log 22, so that it transmits the effort at the associated track 16. Thanks to the fact that this log rolls on both runway 16 and runway 20 of the pusher, only rolling resistance is to overcome, which guarantees freedom for the pusher particularly high displacement. We can reach thus a high precision of torque adjustment tripping, great stability of this torque during time, and good reproducibility of performance from one tool to another.
  • the logs are cylindrical and well guided by the cooperation of their end faces with the vertical sides 116, 117 of tracks 16 and 17. For this, the depth of the corresponding recesses is close the radius of the logs. It follows that a linear contact is kept between each log and the associated tracks, and that the contact pressures are therefore relatively reduced, which reduces wear during time.
  • tracks 20 and 21 are provided across the width of the corresponding strings of the section of the pusher ( Figure 3), and are wider than tracks 16 and 17.
  • the pusher has a some freedom of horizontal movement by rotation around a vertical axis Y-Y which passes through the center of the spherical zone 24, the guidance being provided by the two side contacts 25 ( Figure 3). This guarantees a self-alignment of the pusher relative to the roller 13, and therefore a linear contact, at low contact pressure, between the latter and the cam 26 to 28.
  • the upper ramp 27 can be concave (Figure 8) and / or connect to ramp 26 by a sharp edge 128 ( Figure 9).
  • the surface outer of slide 15 converges forward at an angle ⁇ of a few degrees and present at the rear a spherical region 39 which rotates in the body 2.
  • Two diametrically opposite adjusting screws 40 pass through threaded holes of body 2 and come into contact with the outer surface from the front end of the slide. Their degrees of penetration define the angular orientation ⁇ of the axis of the slide relative to the X-X axis, in the vertical median plane P.
  • the back side of the tail 8 and the front face of the pusher are vertical faces facing each other, each of which has a recess 41 frustoconical with a flat and vertical bottom 42.
  • a cubic die 43 applies, at rest, on the two bottoms 42 ( Figure 11).
  • the die tilts, and the elongation of the axial component of the diagonal which result pushes back the pusher (Figure 12), until tail 8 come into contact with the upper region of body 2, at 38.
  • the die 43 could be replaced by a ball cooperating with two recesses tapered like the ball 30, or by all other known triggering device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
EP97402759A 1996-11-27 1997-11-17 Drehmomentschlüssel Expired - Lifetime EP0845331B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9614547A FR2756203B1 (fr) 1996-11-27 1996-11-27 Cle dynamometrique
FR9614547 1996-11-27

Publications (2)

Publication Number Publication Date
EP0845331A1 true EP0845331A1 (de) 1998-06-03
EP0845331B1 EP0845331B1 (de) 2002-01-30

Family

ID=9498090

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97402759A Expired - Lifetime EP0845331B1 (de) 1996-11-27 1997-11-17 Drehmomentschlüssel

Country Status (6)

Country Link
US (1) US5911801A (de)
EP (1) EP0845331B1 (de)
JP (1) JPH10193274A (de)
AU (1) AU4534697A (de)
DE (1) DE69710162T2 (de)
FR (1) FR2756203B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10305175B4 (de) * 2003-02-08 2006-12-14 Bego Implant Systems Gmbh & Co. Kg Dentalratsche

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6119562A (en) * 1999-07-08 2000-09-19 Jenkins; Bradley G. Electromechanical releasing torque wrench
US6499358B1 (en) 1999-12-27 2002-12-31 Sherwood Services Ag Apparatus for applying a controlled amount of torque
IT1317131B1 (it) * 2000-03-08 2003-05-27 Tecnogi S R L Chiave dinamometrica con meccanismo di scatto a braccio variabile
AUPQ934100A0 (en) * 2000-08-10 2000-08-31 Mathers, Norman Ian Torque wrench
US6463834B2 (en) 2000-10-05 2002-10-15 The Stanley Works Torque wrench
US6467355B1 (en) 2001-04-16 2002-10-22 Irving Leong Most accurate method of tensioning threaded fasteners in assembled units
KR20030050223A (ko) * 2001-12-18 2003-06-25 현대자동차주식회사 배력 식 핸들 렌치
US7082865B2 (en) * 2003-05-01 2006-08-01 Ryeson Corporation Digital torque wrench
US7174818B1 (en) * 2003-10-10 2007-02-13 Snap-On Incorporated Click-type torque wrench and improved cam assembly therefor
US7089834B2 (en) * 2004-04-07 2006-08-15 Ryeson Corporation Torque wrench with torque range indicator and system and method employing the same
US20050223856A1 (en) * 2004-04-07 2005-10-13 John Reynertson Torque wrench with fastener indicator and system and method employing same
US20050257622A1 (en) * 2004-05-24 2005-11-24 Stasiek Jan S Precision adjustable bi-directional load-sensing mechanism and method of use
US7481139B2 (en) * 2006-06-20 2009-01-27 Chih-Ching Hsieh Twisting spanner with auto positioning assembly
CN101306525B (zh) * 2007-05-15 2011-06-15 谢智庆 扭力扳手结构
US7540220B2 (en) * 2007-10-25 2009-06-02 Hsuan-Sen Shiao Electronic torque wrench having a trip unit
EP2566663B1 (de) * 2010-05-07 2018-12-05 GEDORE-Werkzeugfabrik GmbH & Co. KG Justiersystem für werkzeug
TWM448349U (zh) * 2012-09-10 2013-03-11 Kabo Tool Co 組合扭力扳手
TWI517939B (zh) * 2012-09-10 2016-01-21 優鋼機械股份有限公司 組合扭力扳手及其操作方法
CN105437135A (zh) * 2014-08-29 2016-03-30 陈竹村 具锁固装置的扭力扳手
TWI549785B (zh) * 2015-12-04 2016-09-21 Can be quickly and accurately set the torque value of the torque wrench structure
US10427281B2 (en) * 2016-02-15 2019-10-01 The Boeing Company Dynamic off-axis torque wrench compensation
CN106541350B (zh) * 2017-01-27 2021-03-02 丽水新智知识产权运营有限公司 一种设有警示功能的扭矩新型扳手
CN106584337B (zh) * 2017-01-27 2021-09-28 上海优拜机械股份有限公司 设有警示功能的扭矩新型扳手
TWI643715B (zh) * 2018-04-02 2018-12-11 優鋼機械股份有限公司 Torque wrench with elastic parts
TWI641452B (zh) * 2018-04-02 2018-11-21 優鋼機械股份有限公司 Torque wrench with torque adjustment mechanism
TWI643714B (zh) * 2018-04-02 2018-12-11 優鋼機械股份有限公司 Torque wrench with cover
TWI680034B (zh) * 2019-04-11 2019-12-21 和嘉興精密有限公司 扭力扳手結構
CN111890022B (zh) * 2020-08-05 2021-11-26 上海电力大学 一种扭力卸荷机构
TWI757101B (zh) * 2021-02-23 2022-03-01 和嘉興精密股份有限公司 扭力扳手結構
CN113843752B (zh) * 2021-08-27 2024-02-09 北京航天控制仪器研究所 一种动压电机锁紧力矩控制装置及方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE819828C (de) * 1950-06-20 1951-11-05 Friedrich Wiegand Sicherheits-Knarrenschluessel mit einzustellendem hoechstausuebbarem Drehmoment
US2887919A (en) * 1958-04-30 1959-05-26 Apco Mossberg Company Predetermined torque release hand tool
US2897704A (en) * 1957-07-19 1959-08-04 Woods Robert Glen Predetermined torque release, ratchet-type wrench
US2959078A (en) * 1959-06-17 1960-11-08 Skidmore Hungerford Ind Inc Predetermined torque release wrench
US3633445A (en) * 1969-12-01 1972-01-11 Sulo A Aijala Torque release handtool
US5129293A (en) * 1991-06-10 1992-07-14 Precision Instruments, Inc. Torque control mechanism for wrenches and the like
US5244284A (en) * 1991-11-22 1993-09-14 Precision Instruments, Inc. Antifriction roller means for plungers
US5503042A (en) * 1993-11-16 1996-04-02 Precision Instruments, Inc. Antifriction force transmission means for plungers of torque signalling wrenches

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE819828C (de) * 1950-06-20 1951-11-05 Friedrich Wiegand Sicherheits-Knarrenschluessel mit einzustellendem hoechstausuebbarem Drehmoment
US2897704A (en) * 1957-07-19 1959-08-04 Woods Robert Glen Predetermined torque release, ratchet-type wrench
US2887919A (en) * 1958-04-30 1959-05-26 Apco Mossberg Company Predetermined torque release hand tool
US2959078A (en) * 1959-06-17 1960-11-08 Skidmore Hungerford Ind Inc Predetermined torque release wrench
US3633445A (en) * 1969-12-01 1972-01-11 Sulo A Aijala Torque release handtool
US5129293A (en) * 1991-06-10 1992-07-14 Precision Instruments, Inc. Torque control mechanism for wrenches and the like
US5244284A (en) * 1991-11-22 1993-09-14 Precision Instruments, Inc. Antifriction roller means for plungers
US5503042A (en) * 1993-11-16 1996-04-02 Precision Instruments, Inc. Antifriction force transmission means for plungers of torque signalling wrenches

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10305175B4 (de) * 2003-02-08 2006-12-14 Bego Implant Systems Gmbh & Co. Kg Dentalratsche

Also Published As

Publication number Publication date
FR2756203B1 (fr) 1999-02-12
AU4534697A (en) 1998-06-04
JPH10193274A (ja) 1998-07-28
DE69710162D1 (de) 2002-03-14
US5911801A (en) 1999-06-15
FR2756203A1 (fr) 1998-05-29
DE69710162T2 (de) 2002-10-10
EP0845331B1 (de) 2002-01-30

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