DE2719946C2 - Measuring axis - Google Patents
Measuring axisInfo
- Publication number
- DE2719946C2 DE2719946C2 DE19772719946 DE2719946A DE2719946C2 DE 2719946 C2 DE2719946 C2 DE 2719946C2 DE 19772719946 DE19772719946 DE 19772719946 DE 2719946 A DE2719946 A DE 2719946A DE 2719946 C2 DE2719946 C2 DE 2719946C2
- Authority
- DE
- Germany
- Prior art keywords
- strain gauges
- bearing
- bearing bushes
- axis
- measuring
- 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
Links
Classifications
-
- 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
- G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
- G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
- G01L3/108—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving resistance strain gauges
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Measurement Of Force In General (AREA)
Description
ben Länge jeder Lagerbuchse 2 angeordnet, wobei an einer Nutflanke der Außenmantelnuten 7a das tragende Bauteil 4 und an der anderen Nutflanke das lasteinleitende Bauteil 5 angrenzt und dazu dient, die elastische Verformung der Lagerbuchse 2 in dieser Ebene durch Querschnittsverringerung zu erleichtern, damit der in dieser Ebene angeordnete, als aktives Meßelement dienende Dehnungsmeßstreifen 3a die Belastung unverfälscht von z. B. sonst etwa auftretenden Biegeverformungen der Achse ermittelt Die anderen zwei Außenmantelmiten 7b sind jeweils im Abstand von etwa einem Viertel der Länge der Lagerbuchse 2 von dem dem Mittelstück 1 zugewandten Ende angeordnet Diese zwei Außenmantelnuten 7b dienen zur Schmierung der Lagerflächen, wobei die Zufuhr des Schmiermittels durch Bohrungen 8 erfolgt, die radial in und zu den Lagerbuchsen 2 und dem Mittelstück 1 und axial sowie mittig in und zu dem Mittelstück 1 angeordnet sind.ben length of each bearing bush 2 arranged, with the load-bearing component 4 adjoining one flank of the outer casing grooves 7a and the load-introducing component 5 adjoining the other flank of the groove and serving to facilitate the elastic deformation of the bearing bush 2 in this plane by reducing the cross-section so that the in this Plane arranged, serving as an active measuring element strain gauges 3a, the load unadulterated by z. B. otherwise occurring bending deformations of the axis determined The other two outer jacket mites 7b are each arranged at a distance of about a quarter of the length of the bearing bush 2 from the end facing the center piece 1. These two outer jacket grooves 7b are used to lubricate the bearing surfaces, with the supply of lubricant takes place through bores 8 which are arranged radially in and to the bearing bushes 2 and the center piece 1 and axially and centrally in and to the center piece 1.
Außerdem sind die Lagerbuchsen 2 an ihren offenen Enden mit in der Zeichnung nicht dargestellten Kappen verschlossen, die jeweils mittels Schrauben |iit dem Mittelstück 1 verbunden sind und in ihren Außendurchmessern mit den Innendurchmessern der Lagerbuchsen 2 übereinstimmen. Die Kappen schirmen die Dehnungsmeßstreifen 3 vor elektrischen und magnetischen FeI-dem sowie elektromagnetischen Wellen ab und schützen den Innenraum der Lagerbuchsen 2 mittels Rundschnurdichtungen vor mechanischen Außeneinflüssen, z. B. Wasser, explosivem Gas oder Schmutz. Eine der Kappen ist mit einem Schmiernippel ausgerüstet und durch die andere Kappe ist ein abgeschirmtes elektrisches Kabel für die Dehnungsmeßstreifen 3 geführt.In addition, the bearing bushes 2 are provided with caps (not shown in the drawing) at their open ends closed, which are each locked by means of screws | iit the Center piece 1 are connected and in their outer diameters with the inner diameters of the bearing bushes 2 match. The caps shield the strain gauges 3 from electrical and magnetic fields as well as electromagnetic waves and protect the interior of the bearing bushes 2 by means of round cord seals against mechanical external influences, e.g. B. water, explosive gas or dirt. One of the Cap is equipped with a grease nipple and through the other cap is a shielded electrical Cable for the strain gauges 3 out.
Jede Lagerbuchse 2 ist ferner an ihren Enden mit einer Radialnut 9 versehen, in die eine Sicherungsnase am lasttragenden Bauteil 4 eingreift, so daß die Dehnungsmeßstreifen 3 immer ihre Lage beibehalten.Each bearing bush 2 is also provided at its ends with a radial groove 9 into which a locking lug engages the load-bearing component 4, so that the strain gauges 3 always maintain their position.
Die Meßachse arbeitet wie folgt:The measuring axis works as follows:
Gemäß F i g. 1 und 2 wirkt eine Kraft (P) planparallel zur Zeichnunysebene sowie außermittig und unter einem bestimmten Winkel auf das lasteinleitende Bauteil 5. Die Kraft (P) drückt das lasteinleitende Bauteil 5 mit der Achsialkomponente (P=) der Kraft (P) gegen das linke tragende Bauteil 4 und mit der Radialkomponente (P1.) der Kraft (P) auf die Lagerbuchsen 2, wobei die linke Lagerbüchse 2 stärker belastet wird als die rechte Lagerbuchse 2. Sie werden entsprechend der auf sie wirkenden Belastung elastisch sowie etwa ellipsenförmig und unabhängig von Reibungsrückwirkungen der sich berührenden aufeinaiirlerdrückenden Lastübertragungsflächen verformt. Die als aktive Meßelemente dienenden Dehnungsmeßstreifen 3a werden dabei entsprechend der wirkenden Kraft gestaucht und verändern ihren elektrischen Widerstand, wodurch am Diagonalzweig der Brückenschaltung ein der Summe der beiden Dehnungsmeßstreifen 3a entsprechendes Meßsignal abgegeben wird. Dieses Meßsignal wird einem elektrisehen Verstärker zugeführt, der mit einem Anzeigegerät verbunden ist. Dieses Anzeigegerät zeigt die auf die Achse wirkende Radialbelastung der Kraft an.According to FIG. 1 and 2, a force (P) acts plane-parallel to the plane of the drawing as well as eccentrically and at a certain angle on the load-introducing component 5. The force (P) presses the load-introducing component 5 with the axial component (P =) of the force (P) against the left load-bearing component 4 and with the radial component (P 1. ) of the force (P) on the bearing bushes 2, whereby the left bearing bush 2 is more heavily loaded than the right bearing bush 2. They become elastic and approximately elliptical and independent according to the load acting on them deformed by the frictional effects of the contacting load transfer surfaces that press against each other. The strain gauges 3a serving as active measuring elements are compressed according to the acting force and change their electrical resistance, whereby a measurement signal corresponding to the sum of the two strain gauges 3a is emitted at the diagonal branch of the bridge circuit. This measurement signal is fed to an electrical amplifier which is connected to a display device. This display device shows the radial load of the force acting on the axle.
6060
Hierzu 2 Blatt ZeichnungenFor this purpose 2 sheets of drawings
Claims (1)
Lagerbuchsen (2) mit Bohrungen (8) ausgestattet Ein Ausführungsbeispiel der erfindungsgemäßen sind. Meßachse ist in der Zeichnung dargestellt und wird im3. Device according to claim 1 or 2, characterized in that the bearing bushes are marked with that the center piece (1) and the load deform elastically undisturbed and that the Vergerbuchsen (2) for lubricating the bearing surfaces of the wear of the bearing surfaces is greatly reduced.
Bearing bushes (2) equipped with bores (8) are an embodiment of the invention. Measuring axis is shown in the drawing and is in
Die Meßachse besitzt ein zylindrisches Mittelstück 1,F i g. 2 shows a section along the line IMI in FIG. 1.
The measuring axis has a cylindrical center piece 1,
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19772719946 DE2719946C2 (en) | 1977-05-04 | 1977-05-04 | Measuring axis |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19772719946 DE2719946C2 (en) | 1977-05-04 | 1977-05-04 | Measuring axis |
Publications (2)
Publication Number | Publication Date |
---|---|
DE2719946A1 DE2719946A1 (en) | 1978-11-09 |
DE2719946C2 true DE2719946C2 (en) | 1986-03-20 |
Family
ID=6008007
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19772719946 Expired DE2719946C2 (en) | 1977-05-04 | 1977-05-04 | Measuring axis |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE2719946C2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4407066A1 (en) * | 1993-03-04 | 1994-09-22 | Yazaki Corp | Sensor element for a vehicle load measuring device |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3007955A1 (en) * | 1980-03-01 | 1981-09-17 | Fried. Krupp Gmbh, 4300 Essen | Crane jib load measuring equipment - has pulley in head nearest winch supported by non-rotating measuring shaft |
SE438733B (en) * | 1982-03-05 | 1985-04-29 | Bofors Ab | LOAD CELL TYPE CELL |
JP2848507B2 (en) * | 1993-10-07 | 1999-01-20 | ダイワ精工株式会社 | Fishing line tension measuring device for fishing reels |
DE102007048279A1 (en) * | 2007-10-08 | 2009-04-16 | Ching-Fong Hsieh | Winder for strand e.g. cable, has controller calculating load in strand based on load in pin, where controller controls display to display load in strand, and driving device for rotating coil on pin |
DE102008001242B4 (en) * | 2007-11-22 | 2017-10-26 | Tecsis Gmbh | Force measuring pins with low nonlinearity and hysteresis |
DE102016121259B4 (en) * | 2016-11-07 | 2018-07-12 | Brosa Ag | Scissor-based measuring axis with overload protection |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2430705C3 (en) * | 1974-06-26 | 1980-02-07 | Egwin 6000 Frankfurt Leiber | Device for measuring forces in buildings |
-
1977
- 1977-05-04 DE DE19772719946 patent/DE2719946C2/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4407066A1 (en) * | 1993-03-04 | 1994-09-22 | Yazaki Corp | Sensor element for a vehicle load measuring device |
DE4407066C2 (en) * | 1993-03-04 | 1999-03-11 | Yazaki Corp | Strain sensor for a vehicle load measuring device |
Also Published As
Publication number | Publication date |
---|---|
DE2719946A1 (en) | 1978-11-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8110 | Request for examination paragraph 44 | ||
D2 | Grant after examination | ||
8364 | No opposition during term of opposition | ||
8327 | Change in the person/name/address of the patent owner |
Owner name: FRIED. KRUPP AG, 4300 ESSEN, DE |
|
8339 | Ceased/non-payment of the annual fee |