EP0229801A1 - Nouvelle cle de serrage dynamometrique du type a elements deformants de flexion. - Google Patents
Nouvelle cle de serrage dynamometrique du type a elements deformants de flexion.Info
- Publication number
- EP0229801A1 EP0229801A1 EP19860904205 EP86904205A EP0229801A1 EP 0229801 A1 EP0229801 A1 EP 0229801A1 EP 19860904205 EP19860904205 EP 19860904205 EP 86904205 A EP86904205 A EP 86904205A EP 0229801 A1 EP0229801 A1 EP 0229801A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- key
- axis
- tightening
- dynanometric
- bending
- 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
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
- B25B23/1427—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 the tightening tools used in the field of assembly by screwing, making it possible to control the tightening torque either during the assembly operation, or at any time on an already tightened assembly member.
- the torque control means currently used consist of either torque wrenches or sensors.
- torque wrenches or sensors There are currently three types of dynanometric keys: - direct reading keys,
- trigger keys are particularly intended to complete or touch up an assembly for which a minimum tightening torque of the connecting members is required; for this purpose, they are adjusted to a torque value determined in advance, called the tripping torque, beyond which the key has no action on the connecting member: it therefore gives no indication of control. the actual tightening rate.
- Keys with deforming bending elements generally consist of three main elements:
- the purpose of the wrench according to the invention is to ensure a precise tightening torque measurement without risk of error whatever the position of the operator's hand on the handle of the tool and the torque. exercised malen ⁇
- the key which is the subject of the invention, can be made up, like the keys of the same type, of the three elements listed above, which are however distinguished by the following characteristics.
- ⁇ ⁇ - the front end intended to receive the tool, open-end or socket wrench.
- the latter is produced according to an interchangeable end piece whose tail adjusts in a machining provided for this purpose in said front end of the key, this machining being accompanied by a spring leaf assu ⁇
- the assembly contributing to ensuring a precise and unchanging position of the front end of the key relative to the axis of rotation of the assembly member, viS or bolt, this provision guaranteeing the accuracy of the key
- the rear part consists of two parts, one forming a handle bored over its entire length, the other adjusting inside this bore being connected to the front part by an articulated system of two rods, each of which is pivotally mounted by its ends in a side yoke provided on the front and rear parts.
- the articulation axes of links are arranged in such a way that the extension of the straight line joining the axes of the same link passes through the axis of the element of the assembly to be tightened; according to such an arrangement, the force exerted by the operator on the handle is always transmitted via one of the rods, at the same place on the deforming element,
- the rear part housed in the handle and the front part carrying the tool form a single piece, on which suitable machining determines on said piece areas of thinnings realizing, arranged symmetrically on either side of the axis of the key of the bending blades is similar to the articulated links of the previous embodiment.
- the straight lines passing through the axis of the neutral fibers of the minimum sections of the thinning zones corresponding to the ends of the bending blades converge towards the axis of the element to be clamped.
- FIG. 2 represents the distance at which the clamping force is exerted with respect to the axis of rotation of the assembly member
- FIG. 3 represents a partial sectional elevation view of a key according to the invention
- FIG. 4 and 5 show the key in top-section views through the axis
- FIG. 6 shows an alternative embodiment according to a single piece grouping the front part tool holder and the rear part adjusting in the handle and having bending blades
- FIG. 7 represents an elevation view / partial section of a key comprising the variant according to FIG. 6,
- FIG. 8 represents a top-section view through the axis corresponding to FIG. 7,
- FIG. 9 shows a top-sectional view through the axis with a variant positioning of the roller relative to the bending blades.
- the key consists of a front end element 1 or tool holder, a rear end element 2 constituting the handle and an intermediate part 3 corresponding to the element deforming bending.
- the front element 1 has a machining at its end in which the tail of the tool 4 adjusts without play: the connection is stabilized by a device of the snap-on type consisting of a spring steel blade 5 housed in the machining.
- the tool comes at the end of installation, resting on a stop 6 which precisely determines the position of the front end of the key at an invariable distance L from the axis of rotation of the member d 'assembly.
- the front element 1 has at its other end opposite to the tool a housing 1b in which the deforming element 3 fits without play, the connection of the two parts being completed by the installation of a pin 7.
- this same end of the front element 1 comprises two yokes laté ⁇ rales each provided with the hinge axis 8 at right '5 lar to the plane in which exerts the clamping force.
- the rear element 2 consists of two elements with a common axis: a part 2a forming a handle bored over its entire length and a part 2b s * adjusting in the bore of the handle, which part 2b comprises at the end opposite to
- the handle two side yokes 2c each provided with a hinge pin 9 perpendicular to the plane in which the clamping force is exerted.
- the part 2b is also bored over its entire length.
- the front 1 and rear 2 elements are connected i * J. between them by means of a 3eu of two lateral rods 10 each connecting the axes 8 and 9 of the respective yokes the and
- the deforming element 3 made of spring steel has, outside of its embedding zone in the part 1, a free end 3a of rectangular section arranged with so that the largest dimension is perpendicular to the plane containing the rods.
- Part 3a has at its end a bearing with a vertical axis 11, the diameter of which fits without play between the ends of the links 10 substantially at the level of the axes 9, thus creating the points of contact of the links on the deforming element.
- the hinge pins 8 and 9 are mounted on needle sleeves: all of these provisions makes it possible to avoid the presence of any residual force on the deforming element after tightening.
- strain gauges 12 On this element are bonded four temperature self-compensated strain gauges 12 for the steel used; they are arranged in such a way that the signal delivered is proportional to the bending of the element; these gauges are connected to a connector 13 situated at the free end of the handle 2a by means of cables 14 passing through the bores of the parts 2a and 2b.
- the key is connected to an electronic torque measurement unit. All the connecting organs of the parts, front 1 and rear 2, that is to say. rods 10, as well as the deforming element 3, its end bearing and the strain gauges are housed in a protective casing 15 which adjusts on the part 2b.
- the front 1 and rear 2b parts are merged into a single part comprising at its front end the bores la and lb in which the tool 4 and l are housed respectively.
- deforming element 3 its rear end 1d adjusting in the bore of the handle 2a.
- the front and rear parts of the part are connected by an intermediate part comprising a central recess the whose vertical inner flanks determine with the outer flanks two parallel blades lf.
- connection zone of each of these blades with said front and rear parts are executed, on the sides - interior and exterior of the blades, vertical machining 1g using a cylindrical cutter for example so as to determine vertical grooves of substantially semi-circular section, which grooves are arranged in pairs opposite one another on said interior flanks and external so as to achieve a reduction in section of the blades lf by thinning their thickness in the transverse direction to create bending zones lh assimilating said blades to pseudo-rods.
- the key, object of the invention can be used in all cases of assembly by screwing, as a means of controlling the tightening at the time of assembly or of checking on an already tight assembly.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT86904205T ATE61960T1 (de) | 1985-07-02 | 1986-07-01 | Neuer drehmomentschluessel vom typ mit biegeverformungselementen. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8510267A FR2584330B1 (fr) | 1985-07-02 | 1985-07-02 | Nouvelle cle de serrage dynamometrique du type a elements deformants de flexion |
FR8510267 | 1985-07-02 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0229801A1 true EP0229801A1 (fr) | 1987-07-29 |
EP0229801B1 EP0229801B1 (fr) | 1991-03-27 |
Family
ID=9320986
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19860904205 Expired - Lifetime EP0229801B1 (fr) | 1985-07-02 | 1986-07-01 | Nouvelle cle de serrage dynamometrique du type a elements deformants de flexion |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0229801B1 (fr) |
JP (1) | JPS63502335A (fr) |
FR (1) | FR2584330B1 (fr) |
WO (1) | WO1987000109A1 (fr) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2615948B1 (fr) * | 1987-05-27 | 1989-10-27 | Sam Outillage | Cle dynamometrique electronique |
FR2707395B1 (fr) * | 1993-07-09 | 1995-10-06 | Facom | Outil de mesure d'un couple, tel qu'une clé dynamométrique électronique. |
GB0105486D0 (en) * | 2001-03-06 | 2001-04-25 | Norbar Torque Tools | Improvements in torque wrenches |
FR2886809B1 (fr) * | 2005-06-03 | 2007-08-10 | Thales Sa | Drain thermique pour carte electronique |
US8311658B2 (en) | 2008-06-25 | 2012-11-13 | The Boeing Company | System and method for monitoring completed manufacturing operations |
US9256220B1 (en) | 2008-06-25 | 2016-02-09 | The Boeing Company | System and method for monitoring completed manufacturing operations |
US7819025B2 (en) * | 2008-06-25 | 2010-10-26 | The Boeing Company | Electronic torque wrench and method for torquing fasteners |
US8806993B2 (en) * | 2010-02-04 | 2014-08-19 | The Boeing Company | Torque wrench |
US9855643B2 (en) | 2015-01-20 | 2018-01-02 | The Boeing Company | Torque-wrench apparatuses and methods of assembling the same |
US10427281B2 (en) | 2016-02-15 | 2019-10-01 | The Boeing Company | Dynamic off-axis torque wrench compensation |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1034602A (fr) * | 1950-10-04 | 1953-07-28 | Facom Manufacture Francaise De | Clé dynamométrique |
DE3139374A1 (de) * | 1981-10-03 | 1983-04-14 | Dr. Staiger, Mohilo + Co GmbH, 7060 Schorndorf | Mechanischer drehmementschluessel (drehmomentmessung ausserhalb des angriffszentrums) |
-
1985
- 1985-07-02 FR FR8510267A patent/FR2584330B1/fr not_active Expired - Fee Related
-
1986
- 1986-07-01 JP JP50366786A patent/JPS63502335A/ja active Pending
- 1986-07-01 WO PCT/FR1986/000234 patent/WO1987000109A1/fr active IP Right Grant
- 1986-07-01 EP EP19860904205 patent/EP0229801B1/fr not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO8700109A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR2584330A1 (fr) | 1987-01-09 |
EP0229801B1 (fr) | 1991-03-27 |
JPS63502335A (ja) | 1988-09-08 |
WO1987000109A1 (fr) | 1987-01-15 |
FR2584330B1 (fr) | 1990-06-08 |
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