EP2539676A1 - Manchon de mesure de force et dispositif de mesure de force - Google Patents

Manchon de mesure de force et dispositif de mesure de force

Info

Publication number
EP2539676A1
EP2539676A1 EP11705549A EP11705549A EP2539676A1 EP 2539676 A1 EP2539676 A1 EP 2539676A1 EP 11705549 A EP11705549 A EP 11705549A EP 11705549 A EP11705549 A EP 11705549A EP 2539676 A1 EP2539676 A1 EP 2539676A1
Authority
EP
European Patent Office
Prior art keywords
sleeve
force measuring
force
recess
frame
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.)
Withdrawn
Application number
EP11705549A
Other languages
German (de)
English (en)
Inventor
Bernd Futterer
Otto Pfeffer
Harald Böhler
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.)
Brosa AG
Original Assignee
Brosa AG
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 Brosa AG filed Critical Brosa AG
Priority to EP11705549A priority Critical patent/EP2539676A1/fr
Publication of EP2539676A1 publication Critical patent/EP2539676A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
    • G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
    • G01L1/2206—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports
    • G01L1/2218—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports the supports being of the column type, e.g. cylindric, adapted for measuring a force along a single direction
    • G01L1/2225—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports the supports being of the column type, e.g. cylindric, adapted for measuring a force along a single direction the direction being perpendicular to the central axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/16—Applications of indicating, registering, or weighing devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
    • G01G19/14—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing suspended loads
    • G01G19/18—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing suspended loads having electrical weight-sensitive devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/0009—Force sensors associated with a bearing
    • G01L5/0019—Force sensors associated with a bearing by using strain gages, piezoelectric, piezo-resistive or other ohmic-resistance based sensors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/0061—Force sensors associated with industrial machines or actuators

Definitions

  • the invention relates to a force measuring sleeve according to the preambles of patent claims 1 and 6 and to a force measuring device according to the preambles of claims 10, 11 or 14.
  • a force transducer for measuring axial forces can be seen.
  • the deflection wheel is rotatably mounted on an axle.
  • the axis is encompassed by a sleeve which has two mutually spaced circumferential bearing surfaces on which the inner bearing shell of the deflection wheel is supported.
  • a circumferential groove is incorporated in the axle, are inserted in the strain gauges.
  • the groove extends laterally offset and perpendicular to the Aniage Chemistry between the sleeve and the axis, so that the forces introduced by the deflection roller bend the axis, causing geometric variations in the grooves, which are absorbed by the strain gauges, so that the resistance changes of the strain gauges electrical signals are generated by which can be determined, which bending forces are introduced into the axis.
  • force sensors for measuring bending forces in axes have proven successful in practice, they have the disadvantage that such a force transducer must be made available for each deflection wheel, because if several sleeves be placed on an axis, the bending forces of adjacent sleeves affect the measurement result alternately and thus falsify this.
  • the force transmission surfaces between the guide wheel and the sleeve and between the sleeve and the axis and the grooves incorporated in the axis to form the measuring points are laterally offset from each other in the axial direction. This increases the length of the axle and the sleeve in order to provide sufficient space for the formation of the force transmission surfaces and the measuring points, so that there is a considerable space requirement for these power receptacles.
  • DE 199 60 786 A1 discloses a radial force transducer with force introduction elements and force absorption elements, between which deformation bodies with strain gauges applied thereto are arranged.
  • the recess and the force transmission surfaces are arranged in a common plane which is perpendicular to the longitudinal axis of the force measuring sleeve, a force transmission is advantageously ensured, which acts directly on the arranged in the recesses strain gauges. As a result of this structural measure, the introduction of force is thus reliably detected. Due to the provided in the circumferential direction of the force measuring sleeve measuring points and the arrangement of the power transmission surfaces shifts of the radially acting forces can be measured.
  • the force measuring housings are arranged between the cylindrical body as axle or shaft and the frame or the deflecting wheel, a plurality of force measuring housings can be mounted on the cylindrical body, so that the introduction of force can be measured by a plurality of mutually parallel deflection rollers or gears, without the respective forces acting there influencing the adjacent measurements.
  • the axial space size is reduced, because the force transmission surfaces and the measuring points that arise through the recesses and the strain gauges do not extend parallel to the longitudinal axis of the force measuring sleeve, but rather perpendicular to this; only the radial tree space size is increased by this structural design.
  • the bearings to accommodate the corresponding radial forces are often to be dimensioned in a corresponding Wegnverphaseitnis, is sufficient space available in the radial direction. Due to the different arrangements of the force measuring sleeve and their different structural configurations, various measuring principles for detecting compressions, bends and shears or the like can be detected.
  • FIG. 1 shows a first exemplary embodiment of a force-measuring device, by means of which the forces transmitted radially from a deflection wheel and a gearwheel on a cylindrical body can be determined by means of two force measuring sleeves installed in different positions, in section
  • FIG. 2 a second embodiment a force-measuring device, by means of which the radially acting forces transmitted by a deflection wheel to a cylindrical body can be measured by means of two force measuring sleeves, which are installed between a frame and a bearing of the cylindrical body, in section,
  • FIG. 3a shows a third exemplary embodiment of a force-measuring device, by means of which the forces acting on a cylindrical body can be measured, which are transmitted from adjacently mounted deflection rollers, in section, FIG.
  • 3b shows a force measuring sleeve according to the figures 1, 2 or 3a in a perspective view
  • Figure 4a shows a fourth embodiment of a force measuring device with a
  • Force measuring sleeve which has eight measuring points pointing in the circumferential direction, in section,
  • FIG. 1 A force measuring device 21 shown in FIG. 1 is intended to detect the measurement of radially acting forces which can be determined, for example, by means of a deflecting wheel 6 mounted on a cylindrical body 2.
  • a deflecting wheel 6 mounted on a cylindrical body 2.
  • Umlenkrädem 6 which are attached to boom arms of cranes, it is necessary to determine the loads to be lifted and transported in order to prevent that due to overloads of the recorded components damage to the Kranaurisoner arise and this may bend in the direction of the ground and falls down.
  • the force measuring device 21 further consists of a schematically illustrated frame 1, in which the cylindrical body 2 is rotatably mounted.
  • the cylindrical body 2 thus represents an axis 2 '.
  • the bearing 3 comprises an outer bearing shell 4 and an inner bearing shell 5 between which, for example, a plurality of balls, rollers or the like are arranged.
  • a rope 24 should be kept out;
  • the gear 7 has an outer toothing 25, which is for example in engagement with an adjacent gear.
  • the force measuring sleeve 11 is designed as a cylindrical hollow body, the longitudinal axis 12 in the mounted state is aligned with the longitudinal axis of the axis 2 '.
  • the force measuring sleeve 11 therefore surrounds, for example, as shown in Figure 1, the axis 2 '.
  • the force measuring sleeve 1 1 has an outer force transmission surface 14, in which four recesses 15 are incorporated. The four recesses 15 lie on a circular path which extends around the longitudinal axis 12.
  • two opposite recesses 15 lie on a common axis of symmetry 17, which is aligned perpendicular to the longitudinal axis 12 and each extending through the center of the circular recess 15.
  • two circular paths are provided on the outer force transmission surface 14, on each of which four of the recesses 15 are incorporated.
  • Two recesses 15 of the two adjacent circular paths form a common axis, which is aligned concentrically to the longitudinal axis 12.
  • the recesses 15 open into a bottom 16 and consist of a round wall 16 'to which one or more strain gauges 10 are attached.
  • the recesses 15 and the strain gauges 10 are subsequently defined as a measuring point 26.
  • the respective measuring point 26 can also be formed by optical, inductive or capacitive measuring methods.
  • each measuring part 16 that is to say in particular for each recess 15, there is provided a support 18 integrally formed on the inner force transmission surface 13, by means of which a common force transmission surface 13 is formed.
  • the respective support 18 is designed as a ring segment, so that in the embodiment shown four ring segments of the supports 18 lie on a common circular path.
  • the supports 8 are aligned in alignment with the recesses 15 incorporated on the outer force transmission surface 14.
  • the outer contour of the support 18 does not coincide with the round inner contour of the recesses 15, but this can be provided without further constructive, is as a geometric condition for the arrangement of the support 18 to the respective recess 15 requires that the symmetry axis 17 formed by the respective recess 15, together with the circumferential central axis 19 of the four circular path forming supports 18, lie in a common plane which is oriented perpendicular to the longitudinal axis 12.
  • the pairs of bearing 18 and recess 15 may be arranged helically.
  • the supports 18 are each arranged exactly symmetrically in the region of the recess 15 and the radially acting forces are conducted from the outer force transmission surface 14 to the supports 18 acting as the inner force transmission surface 13 supports and thus flow through the measuring point 26, in the measuring point 26 arranged strain gauges 10 expanded or compressed, so that a change in resistance of the individual strain gauges 10 is generated, through which an electrical signal is generated, through which the introduced radial forces can be determined.
  • the measuring point 26 is also conceivable to provide the measuring point 26 as an insert, which is glued or welded into a through hole incorporated in the sleeve 11. On an outwardly or inwardly projecting surface, the supports 18 and on the opposite surface of the strain gauges 10 are provided.
  • FIG. 2 shows further examples of use.
  • the cylindrical body 2 is now used as a shaft 2 "set in rotation by a drive device 22.
  • the shaft 2" is held in the frame 1 by means of two bearings 3 in a conventional manner.
  • the operative connection between the drive device 22 and the shaft 2 "takes place by way of example by means of a belt 23.
  • the deflection roller 6 is connected by means of a feather key 8, which in one in the shaft 2 "incorporated groove 9, which is incorporated in the inner contour of the guide wheel 6 is drivingly connected to the shaft 2".
  • a feather key 8 which in one in the shaft 2 "incorporated groove 9, which is incorporated in the inner contour of the guide wheel 6 is drivingly connected to the shaft 2".
  • the force measuring sleeve 11 is installed in a part of the frame 1 between this and the outer bearing shell 4 and the supports 18 are facing the outer bearing shell 4.
  • the measuring points 26 point in the direction of the frame 1.
  • the force measuring sleeve 11 is positioned so that the measuring points 26 adjacent to the outer bearing shell 4 and the supports 18 are facing the: frame 1.
  • the sleeve 11 can be configured with a corresponding inner contour for driving connection with the shaft 2 ", and FIGS. 4a and 4b show a force measuring sleeve 31 of a different constructive design
  • the force measuring sleeve 31 has two free opposite end faces 34 and 35 , at each of which four ring segments 33 are formed, and the axes of symmetry of the respective ring segments 33 are spaced 90 ° apart from each other
  • the ring segments 33 have inner and outer force transmission surfaces 38 and 39, respectively Centering for one for the inserted into the force measuring sleeve 31 cylindrical body 2. Accordingly, at least two ring segments 33 are required, which must face each other in alignment, in order to accomplish the centering of the male cylindrical body 2.
  • the idea essential to the invention also includes the arrangement of three or more ring segments 33, which can be arranged distributed at an arbitrary angle to each other on a circular path in the circumferential direction of the sleeve 31.
  • the supports 18 of the sleeve 11 are positioned at an arbitrary angle to each other.
  • the centerings for the axis 2 'and the shaft 2' can be achieved.
  • at least one of the supports 18 is aligned with a recess 15 and at least one of the ring segments 33 of the sleeve 3 of the recess 36 assigned.
  • Each of the four ring segments 33 has two circumferentially extending end faces 40, in each of which a recess 36 is formed.
  • the recesses 36 of one of the ring segments 33 are aligned exactly with one another and incorporated in the end face 40.
  • the inner contour of the recess 36 is round; However, this can also be configured polygonal.
  • the strain gauges 10 are attached; It is also possible to attach the strain gauges 10 to the wall 37 of the recess 36.
  • FIG. 4a The force flow occurring with radially acting forces can be seen in FIG. 4a.
  • the radially acting forces to be absorbed by the deflecting wheel 6 are first transmitted to the outer force transmission surface 39 and pass through the ring segments 33 via the inner force transmission surface 38 to the shaft 2 " or bending forces acting on the power transmission sleeve 31.
  • Figure 4a shows that the key 8 and the groove 9 is incorporated between two ring segments 33 in the force measuring sleeve 31.
  • Both the supports 18 and the ring segments 33 can be arranged at any angle to each other.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Abstract

La présente invention concerne un manchon de mesure de force (11) comprenant au moins une surface de transfert de force intérieure et une surface de transfert de force extérieure (13, 14) qui s'étendent concentriquement à l'axe longitudinal (12) du manchon (11). L'invention a pour objet de garantir d'une part que plusieurs roues de renvoi (6) ou roues dentées (7) puissent être positionnées sur un axe (21) ou arbre (2'') commun sans que les forces transmises par la roue de renvoi (6) ou roue dentée (7) respective n'aient pour autant d'influence sur le résultat de mesure d'emplacements de mesure voisins, et d'autre part que l'encombrement axial nécessaire soit maintenu très petit. A cet effet : les surfaces de transfert de force intérieure et extérieure (13, 14) sont alignées entre elles en intégralité ou par zones; au moins un évidement (15) est pratiqué dans la surface de transfert de force intérieure ou dans la surface de transfert de force extérieure (13 ou 14), ledit évidement présentant un axe de symétrie (17) perpendiculaire à l'axe longitudinal (12) du manchon (11); au moins une bande de mesure de dilatation (10) est fixée sur le fond (16) et/ou sur la paroi (16') de l'évidement (15); à l'opposé de chaque évidement (15) sur la surface de transfert de force extérieure ou sur la surface de transfert de force intérieure (14 ou 13) se trouve un élément d'appui (18) qui s'étend en direction périphérique du manchon (11) et dépasse de celui-ci; l'axe de symétrie (17) de l'évidement (15) respectif et l'axe de symétrie radial (19) de l'élément d'appui (18) s'étendent dans un plan commun ou dans deux plans parallèles entre eux; et au moins un second élément d'appui (18) se trouve sur la surface de transfert de force extérieure ou la surface de transfert de force intérieure (14 ou 13).
EP11705549A 2010-02-25 2011-02-24 Manchon de mesure de force et dispositif de mesure de force Withdrawn EP2539676A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11705549A EP2539676A1 (fr) 2010-02-25 2011-02-24 Manchon de mesure de force et dispositif de mesure de force

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP10154721.4A EP2362200B1 (fr) 2010-02-25 2010-02-25 Douille de mesure de force ainsi que de dispositif de mesure de force
EP11705549A EP2539676A1 (fr) 2010-02-25 2011-02-24 Manchon de mesure de force et dispositif de mesure de force
PCT/EP2011/052708 WO2011104289A1 (fr) 2010-02-25 2011-02-24 Manchon de mesure de force et dispositif de mesure de force

Publications (1)

Publication Number Publication Date
EP2539676A1 true EP2539676A1 (fr) 2013-01-02

Family

ID=42338364

Family Applications (2)

Application Number Title Priority Date Filing Date
EP10154721.4A Active EP2362200B1 (fr) 2010-02-25 2010-02-25 Douille de mesure de force ainsi que de dispositif de mesure de force
EP11705549A Withdrawn EP2539676A1 (fr) 2010-02-25 2011-02-24 Manchon de mesure de force et dispositif de mesure de force

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP10154721.4A Active EP2362200B1 (fr) 2010-02-25 2010-02-25 Douille de mesure de force ainsi que de dispositif de mesure de force

Country Status (2)

Country Link
EP (2) EP2362200B1 (fr)
WO (1) WO2011104289A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106353024B (zh) * 2015-01-15 2019-05-07 南京林业大学 基于压电效应供电的机械密封端面摩擦扭矩测量装置
WO2019178784A1 (fr) * 2018-03-21 2019-09-26 舍弗勒技术股份两合公司 Ensemble palier et système de détection de charge de palier
CN112453125B (zh) * 2020-10-30 2022-07-22 山东鼎昌洁净工程设备有限公司 一种用于钣金件的折弯设备

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3617085A1 (de) 1985-10-21 1987-11-26 Messerschmitt Boelkow Blohm Vorrichtung zum messen von in eisenbahnschienen oder aehnlichen belasteten balken wirkenden kraeften
US6490935B1 (en) * 1999-09-28 2002-12-10 The Timken Company System for monitoring the operating conditions of a bearing
DE19960786A1 (de) 1999-12-16 2001-06-21 Schenck Process Gmbh Radialkraftaufnehmer
NL1019636C1 (nl) 2001-12-21 2003-06-24 Idbike Buigingssensor.
DE10245768B8 (de) 2002-09-25 2005-02-10 EBM Brosa Messgeräte GmbH & Co. KG Kraftaufnehmer zum Messen von Achskräften
JP2004301761A (ja) * 2003-03-31 2004-10-28 Toyota Industries Corp 巻掛伝動部材の張力検出装置及びトルク検出装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011104289A1 *

Also Published As

Publication number Publication date
EP2362200B1 (fr) 2015-05-27
WO2011104289A1 (fr) 2011-09-01
EP2362200A1 (fr) 2011-08-31

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