WO2018202228A1 - Capteur de couple à double bride - Google Patents

Capteur de couple à double bride Download PDF

Info

Publication number
WO2018202228A1
WO2018202228A1 PCT/DE2018/000130 DE2018000130W WO2018202228A1 WO 2018202228 A1 WO2018202228 A1 WO 2018202228A1 DE 2018000130 W DE2018000130 W DE 2018000130W WO 2018202228 A1 WO2018202228 A1 WO 2018202228A1
Authority
WO
WIPO (PCT)
Prior art keywords
spring elements
torque transducer
double
deformation element
flange torque
Prior art date
Application number
PCT/DE2018/000130
Other languages
German (de)
English (en)
Inventor
Jürgen Andrae
Rene VIERATH
Norbert Würfl
Anke GOTTSCHLING
Original Assignee
Hottinger Baldwin Messtechnik Gmbh
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 Hottinger Baldwin Messtechnik Gmbh filed Critical Hottinger Baldwin Messtechnik Gmbh
Publication of WO2018202228A1 publication Critical patent/WO2018202228A1/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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
    • G01L3/02—Rotary-transmission dynamometers
    • G01L3/14—Rotary-transmission dynamometers wherein the torque-transmitting element is other than a torsionally-flexible shaft
    • G01L3/1407—Rotary-transmission dynamometers wherein the torque-transmitting element is other than a torsionally-flexible shaft involving springs
    • G01L3/1428—Rotary-transmission dynamometers wherein the torque-transmitting element is other than a torsionally-flexible shaft involving springs using electrical transducers
    • G01L3/1457—Rotary-transmission dynamometers wherein the torque-transmitting element is other than a torsionally-flexible shaft involving springs using electrical transducers involving resistance strain gauges

Definitions

  • the invention relates to a flange-shaped Drehmomentetzillon and in particular a torque sensor which can be used for high speeds. Furthermore, the torque transducer is relatively insensitive to disturbing forces.
  • a torque transducer has two attachment disks, hereinafter referred to as flanges.
  • One flange is bolted to a drive shaft, the other flange to a shaft to be set in rotation by the drive shaft.
  • Both flanges are connected to a deformation element that elastically deforms under the influence of a torque.
  • strain gauges are applied to measure the strain occurring there, which is proportional to the size of the torque.
  • Characteristic of these deformation elements is that the locations where the strain gauges are applied, have a strain behavior that is strictly proportional to the applied torque. However, this is a theoretical assumption. In practice, it happens that the two waves are not exactly in the same axis, whereby three cases are to be distinguished: the axes are slightly offset parallel to each other or are at an angle to each other or are offset in parallel and are also at an angle to each other , In all three cases additional forces are transmitted to the deformation element. Depending on the specific geometry of the deformation element, different measurement errors occur. One of the hitherto customary methods for preventing such measurement errors is the most rigid possible design of the deformation element.
  • the object of the invention to provide a torque sensor which emits a high measurement signal and at the same time is relatively insensitive to forces which do not act in the effective direction of the torque. Furthermore, the torque transducer should also at high speeds, z. B. occur in engine test beds, have no or only very small speed-dependent measurement error.
  • the deformation element is located in the axis of rotation of the double flange torque transducer, wherein extending between the mounting flanges at least three rod-shaped spring elements which are attached to the outer edge region of the mounting flanges or between the mounting holes and on which Spring elements no strain gauges or other sensors are provided.
  • the deformation element lying in the axis of rotation of the double-flange torque transducer may have a relatively small diameter. By a relatively small diameter is meant the following: If a double-flange torque receiver is to be used without the rod-shaped spring elements, the deformation element must have a larger diameter in order that it has the necessary rigidity.
  • the strain gauges are arranged on a deformation element with a larger diameter and thus the electrical connection wires are further away from the axis of rotation, larger centrifugal forces also occur at the strain gauges and the electrical connection wires.
  • the diameter of the deformation element can therefore be made small, so that the centrifugal forces occurring are small. As a result, comparatively low centrifugal forces occur even at high speeds.
  • the spring elements have a rectangular cross section, whose narrow side is directed to the axis of rotation.
  • the spring elements on a round cross-section are provided.
  • the spring elements made of a different material than the deformation element.
  • the spring elements made of ceramic.
  • the material of the spring elements on a different spring constant than the material of the deformation element is different than the material of the deformation element.
  • the spring elements are alternately made of different materials.
  • the individual spring elements alternately have a different cross-section.
  • through holes for receiving the spring elements are provided in both flanges.
  • through holes and in the other flange blind holes for receiving the spring elements are provided in one of the two flanges.
  • FIG. 1 shows a perspective view of a double flange torque transducer according to the prior art.
  • FIG. 2 shows the double-flange torque transducer according to FIG. 1 in a side view.
  • Fig. 3 shows a double flange torque transducer with a smaller diameter of the deformation element.
  • Fig. 4 shows a double flange torque transducer with spring elements having a circular cross section.
  • Fig. 5 shows a double-flange torque transducer with spring elements which have a circular cross-section, but differ alternately in the modulus of elasticity.
  • Fig. 6 shows a double-flange torque transducer with spring elements which have alternately a circular and a rectangular cross-section.
  • FIG. 1 shows a double-flange torque transducer according to the prior art with the following features: two mutually parallel disc-shaped mounting flanges (3, 4) and a between these mounting flanges (3, 4) extending cylindrical deformation element (1) are together in one piece Made of steel.
  • the disc-shaped mounting flanges (3, 4) have fastening bores 5 in their edge region.
  • the deformation element (1) extends rotationally symmetrically along the axis of rotation of the double-flange torque transducer.
  • strain gauges (2) are applied, which are shown only symbolically in the drawings.
  • FIG. 2 shows the double-flange torque transducer according to FIG. 1.
  • the reference symbol a denotes the radius of the deformation element (1).
  • the radius must be relatively large for the double flange torque transducer to have sufficient stability against lateral forces. Since the radius a is relatively large, also the centrifugal forces acting on the strain gauges and on the electrical connection cables upon rotation of the double-flange torque transducer are relatively large.
  • FIG. 3 shows a double flange torque transducer similar to that shown in FIG.
  • the reference symbol b denotes the radius of the deformation element (1).
  • the radius b is much smaller than the radius a. This has the advantage that the centrifugal forces acting on the strain gauges and on the electrical connection cables are smaller.
  • the arrows symbolically show that this construction deforms under the influence of laterally attacking forces. This leads to inadmissibly high measuring errors.
  • FIG. 4 shows a first embodiment of a double flange torque transducer according to claim 1 with a deformation element (1) having a relative has small radius b.
  • spring elements 6 are arranged to protect against transverse forces. This prevents that these lateral forces cause measurement errors in the torque measurement.
  • the comparatively small radius b has the advantage that the centrifugal forces occurring on the measuring element remain relatively low even at high speeds, and thus also cause only a very small zero shift.
  • the use of spring elements with a circular cross-section has the advantage that it is possible to secure the spring elements in the holes provided for this purpose in both flanges with little effort, for. B. by means of a shrink connection. The dimensioning of components for the production of shrink joints is known in the art and therefore need not be explained.
  • FIG. 5 shows a double-flange torque transducer with the following features:
  • spring elements (6) which have a circular cross-section, but are made of two steels with different modulus of elasticity, wherein the different elasticity in the spring elements are arranged alternately.
  • the modulus of elasticity By a predetermined selection of the modulus of elasticity, the natural frequency of the double flange torque sensor can be selectively influenced. This option is advantageous for measurements performed on engine test benches.
  • Fig. 6 shows a double flange torque transducer having the following features:
  • the spring elements are arranged between the mounting holes.
  • the spring elements have alternately a circular and a square cross-section. With such an arrangement, the natural frequency of the double flange torque transducer can also be influenced in a targeted manner.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Abstract

L'invention concerne un capteur de couple en forme de bride à faible erreur zéro aux vitesses de rotation élevées. Le capteur présente les caractéristiques suivantes : deux brides de fixation (3, 4) en forme de disque, parallèles entre elles et comportant des trous de fixation (5) prévus dans la zone de bord des brides de fixation (3, 4), un élément de déformation (1) s'étendant entre les brides de fixation (3, 4) et disposé sur la jauge de contrainte (2). L'élément de déformation (1) est situé dans l'axe de rotation du capteur de couple à double bride. Au moins 3 éléments à ressort (6, 7) en forme de barre, qui sont fixés à la zone de bord extérieure des brides de fixation (3, 4) ou entre les trous (5), s'étendent entre les brides de fixation (3, 4) et aucune jauge de contrainte ou aucun autre capteur n'est prévu sur ces éléments à ressort (6, 7).
PCT/DE2018/000130 2017-05-05 2018-05-07 Capteur de couple à double bride WO2018202228A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017004378.7A DE102017004378A1 (de) 2017-05-05 2017-05-05 Doppelflansch-Drehmomentaufnehmer
DE102017004378.7 2017-05-05

Publications (1)

Publication Number Publication Date
WO2018202228A1 true WO2018202228A1 (fr) 2018-11-08

Family

ID=63103736

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2018/000130 WO2018202228A1 (fr) 2017-05-05 2018-05-07 Capteur de couple à double bride

Country Status (2)

Country Link
DE (1) DE102017004378A1 (fr)
WO (1) WO2018202228A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE544875C2 (en) * 2021-07-06 2022-12-20 Intermercato Ab A load cell for detecting a force, a system for handling a load and a method for calculating a size of a force

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0575634A1 (fr) 1992-05-25 1993-12-29 Hottinger Baldwin Messtechnik Gmbh Palpeur de couple
US5753828A (en) * 1996-06-18 1998-05-19 Ei Sensors & Systems Company, Inc. Shaft torque measuring system
EP1074826A2 (fr) * 1999-08-02 2001-02-07 HBM Mess- und Systemtechnik GmbH Capteur de couple
DE102010034638A1 (de) * 2010-03-03 2011-09-08 GIF Gesellschaft für Industrieforschung mbH Drehmomentmesswelle
DE102014115615A1 (de) * 2014-10-28 2016-04-28 Werner Stehr Tribologie Drehmomentmessvorrichtung
DE102015110861A1 (de) 2015-07-06 2017-01-12 Centa-Antriebe Kirschey Gmbh Vorrichtung zur Übertragung von Drehmomenten

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3212946A1 (de) * 1982-04-07 1983-11-03 Harald 6233 Kelkheim Matschin Drehmomentmessystem
DE102007005894A1 (de) * 2006-06-14 2007-12-20 GIF Gesellschaft für Industrieforschung mbH Drehmomentmessflansch
US8161828B1 (en) * 2009-09-29 2012-04-24 Interface, Inc. Load cell for monitoring torsion and having over load protection
JP2011209099A (ja) * 2010-03-30 2011-10-20 Sony Corp トルクセンサおよびロボット装置
DE202010005613U1 (de) * 2010-06-10 2010-09-02 Eduard Wille Gmbh & Co. Kg Drehmoment-Aufnehmer mit U-Profil-Steg
DE102011000054B4 (de) * 2011-01-07 2014-12-11 Deutsches Zentrum für Luft- und Raumfahrt e.V. Torsionssensor
DE102014017410A1 (de) * 2014-11-06 2016-05-12 GIF Gesellschaft für Industrieforschung mbH Drehmomentmesswelle
DE102016010551B3 (de) * 2016-08-31 2018-02-08 Sensodrive Gmbh Drehmomentsensor mit radialelastischer Momentübertragung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0575634A1 (fr) 1992-05-25 1993-12-29 Hottinger Baldwin Messtechnik Gmbh Palpeur de couple
US5753828A (en) * 1996-06-18 1998-05-19 Ei Sensors & Systems Company, Inc. Shaft torque measuring system
EP1074826A2 (fr) * 1999-08-02 2001-02-07 HBM Mess- und Systemtechnik GmbH Capteur de couple
DE102010034638A1 (de) * 2010-03-03 2011-09-08 GIF Gesellschaft für Industrieforschung mbH Drehmomentmesswelle
DE102014115615A1 (de) * 2014-10-28 2016-04-28 Werner Stehr Tribologie Drehmomentmessvorrichtung
DE102015110861A1 (de) 2015-07-06 2017-01-12 Centa-Antriebe Kirschey Gmbh Vorrichtung zur Übertragung von Drehmomenten

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Publication number Publication date
DE102017004378A1 (de) 2018-11-08

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