EP0845331B1 - Clé dynamométrique - Google Patents
Clé dynamométrique Download PDFInfo
- Publication number
- EP0845331B1 EP0845331B1 EP97402759A EP97402759A EP0845331B1 EP 0845331 B1 EP0845331 B1 EP 0845331B1 EP 97402759 A EP97402759 A EP 97402759A EP 97402759 A EP97402759 A EP 97402759A EP 0845331 B1 EP0845331 B1 EP 0845331B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- torque wrench
- plunger
- track
- wrench according
- outer body
- 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.)
- Expired - Lifetime
Links
Images
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 rear end of the head (see US-A-3,633,445).
- 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 solidarity.
- 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.
Description
- la Figure 1 est une vue de dessus, avec coupe partielle, d'une clé à cassure conforme à l'invention;
- la Figure 2 est une vue en coupe de côté, prise suivant la ligne II-II de la Figure 1;
- la Figure 3 est une vue en coupe transversale prise suivant la ligne III-III de la Figure 4;
- la Figure 4 est une vue en coupe de côté, à plus grande échelle, de la région IV de la Figure 2;
- la Figure 5 est une vue de dessus, partiellement en coupe suivant la ligne V-V de la Figure 4;
- les Figures 6 et 7 sont des vues analogues à la Figure 4, illustrant respectivement deux phases successives du fonctionnement de la clé;
- les Figures 8 et 9 sont des vues partielles analogues à la Figure 4 de deux variantes;
- la Figure 10 est une vue analogue à la Figure 4 d'une autre variante;
- la Figure 11 est une vue analogue à la Figure 4 d'un autre mode de réalisation de l'invention, constituant une clé à déclenchement; et
- la Figure 12 est une vue analogue à la Figure 11, représentant la clé après son déclenchement.
Claims (11)
- Clé dynamométrique, du type comprenant un corps extérieur (2) de forme allongée dans lequel la tête (1) de la clé est articulée autour d'un pivot (12); un poussoir (3) mobile axialement dans le corps extérieur et sollicité vers la tête par un ressort taré (4); au moins un premier élément roulant (22) destiné à réduire le frottement lors des déplacements du poussoir, cet élément roulant comportant une surface périphérique qui roule sur une première piste (16) solidaire du corps extérieur et qui est pressée contre cette piste lors de l'application du couple; et un organe de transmission d'effort (13; 43) interposé entre l'extrémité avant du poussoir et l'extrémité arrière de la tête, caractérisée en ce que l'élément roulant (22) est un rondin cylindrique dont la surface périphérique roule également sur une deuxième piste (20) ménagée sur le poussoir (3), et en ce que chaque piste (16, 20) est plane.
- Clé dynamométrique suivant la revendication 1, caractérisée en ce que l'une des deux pistes (16) est délimitée par des flancs (116) qui coopèrent avec les faces d'extrémité du rondin (22) tandis que l'autre piste (20) est plus large.
- Clé dynamométrique suivant la revendication 1 ou 2, caractérisée en ce qu'elle comprend des moyens (23; 24) de contact direct ou indirect entre une pièce (15) solidaire du corps extérieur (2) et une région du poussoir (3) située en arrière de ladite deuxième piste (20) et à l'opposé de cette dernière par rapport à l'axe général (X-X) du corps extérieur.
- Clé dynamométrique suivant la revendication 3, caractérisée en ce que lesdits moyens (23,24) de contact comprennent un second élément de roulement (23), notamment analogue audit premier élément de roulement (22).
- Clé dynamométrique suivant la revendication 3, caractérisée en ce que lesdits moyens (23,24) de contact comprennent une surface bombée (24) solidaire du poussoir (3).
- Clé dynamométrique suivant l'une quelconque des revendications 1 à 5, caractérisée en ce que le poussoir (3) comporte à son extrémité avant deux rampes de cames successives (26, 27) ayant deux inclinaisons différentes, reliées par un arrondi (28) ou par une arête vive (128), et en ce que l'organe de transmission d'effort (13) roule sur ces rampes.
- Clé dynamométrique suivant la revendication 6, caractérisée en ce que l'organe de transmission d'effort (13) et les rampes (27, 28) possèdent des génératrices conjuguées, notamment linéaires, et en ce que le poussoir (3) est monté avec une liberté de débattement qui assure son auto-alignement sur l'organe de transmission d'effort (13).
- Clé dynamométrique suivant l'une quelconque des revendications 1 à 5, caractérisée en ce que l'organe de transmission d'effort (43) est un dé (43) ou une bille qui coopère avec des évidements (41) en regard du poussoir (3) et de la tête (1).
- Clé dynamométrique suivant l'une quelconque des revendications 1 à 8, caractérisée en ce que ladite première piste (16) est ménagée dans une glissière (15) rapportée dans le corps extérieur (2).
- Clé dynamométrique suivant la revendication 9, caractérisé en ce que l'orientation de la glissière (15) par rapport à l'axe général (X-X) du corps extérieur (2) est réglable.
- Clé dynamométrique suivant la revendication 10, caractérisée en ce que la glissière (15) a une forme générale tubulaire et présente une surface extérieure convergente avec, à une extrémité de cette surface, une forme rotulante (39) et, à l'extrémité opposée de cette surface, des moyens de réglage d'inclinaison, notamment des vis radiales (40), qui traversent le corps extérieur (2).
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 EP0845331A1 (fr) | 1998-06-03 |
EP0845331B1 true EP0845331B1 (fr) | 2002-01-30 |
Family
ID=9498090
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97402759A Expired - Lifetime EP0845331B1 (fr) | 1996-11-27 | 1997-11-17 | Clé dynamométrique |
Country Status (6)
Country | Link |
---|---|
US (1) | US5911801A (fr) |
EP (1) | EP0845331B1 (fr) |
JP (1) | JPH10193274A (fr) |
AU (1) | AU4534697A (fr) |
DE (1) | DE69710162T2 (fr) |
FR (1) | FR2756203B1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105437135A (zh) * | 2014-08-29 | 2016-03-30 | 陈竹村 | 具锁固装置的扭力扳手 |
TWI680034B (zh) * | 2019-04-11 | 2019-12-21 | 和嘉興精密有限公司 | 扭力扳手結構 |
Families Citing this family (29)
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 |
DE10305175B4 (de) * | 2003-02-08 | 2006-12-14 | Bego Implant Systems Gmbh & Co. Kg | Dentalratsche |
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 |
US20050223856A1 (en) * | 2004-04-07 | 2005-10-13 | John Reynertson | Torque wrench with fastener indicator and system and method employing same |
US7089834B2 (en) * | 2004-04-07 | 2006-08-15 | Ryeson Corporation | Torque wrench with torque range indicator and system and method employing the 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 |
EP2566662B1 (fr) * | 2010-05-07 | 2018-11-21 | GEDORE-Werkzeugfabrik GmbH & Co. KG | Outil |
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 |
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 |
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 |
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 |
TWI643714B (zh) * | 2018-04-02 | 2018-12-11 | 優鋼機械股份有限公司 | Torque wrench with cover |
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 |
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 |
Family Cites Families (8)
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 |
-
1996
- 1996-11-27 FR FR9614547A patent/FR2756203B1/fr not_active Expired - Fee Related
-
1997
- 1997-11-17 EP EP97402759A patent/EP0845331B1/fr not_active Expired - Lifetime
- 1997-11-17 DE DE69710162T patent/DE69710162T2/de not_active Expired - Fee Related
- 1997-11-21 AU AU45346/97A patent/AU4534697A/en not_active Abandoned
- 1997-11-25 US US08/978,485 patent/US5911801A/en not_active Expired - Lifetime
- 1997-11-27 JP JP9326214A patent/JPH10193274A/ja active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105437135A (zh) * | 2014-08-29 | 2016-03-30 | 陈竹村 | 具锁固装置的扭力扳手 |
TWI680034B (zh) * | 2019-04-11 | 2019-12-21 | 和嘉興精密有限公司 | 扭力扳手結構 |
Also Published As
Publication number | Publication date |
---|---|
FR2756203A1 (fr) | 1998-05-29 |
AU4534697A (en) | 1998-06-04 |
JPH10193274A (ja) | 1998-07-28 |
FR2756203B1 (fr) | 1999-02-12 |
EP0845331A1 (fr) | 1998-06-03 |
US5911801A (en) | 1999-06-15 |
DE69710162T2 (de) | 2002-10-10 |
DE69710162D1 (de) | 2002-03-14 |
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