DE3834883A1 - Device for the determination of shaft forces - Google Patents

Device for the determination of shaft forces

Info

Publication number
DE3834883A1
DE3834883A1 DE3834883A DE3834883A DE3834883A1 DE 3834883 A1 DE3834883 A1 DE 3834883A1 DE 3834883 A DE3834883 A DE 3834883A DE 3834883 A DE3834883 A DE 3834883A DE 3834883 A1 DE3834883 A1 DE 3834883A1
Authority
DE
Germany
Prior art keywords
crossbar
coupling
strain gauges
trailer
vehicle
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Withdrawn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
DE3834883A
Other languages
German (de)
Inventor
Juergen Dipl Ing Wrede
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to DE3834883A priority Critical patent/DE3834883A1/en
Priority to IT02198689A priority patent/IT1236549B/en
Priority to FR898913455A priority patent/FR2637981B3/en
Publication of DE3834883A1 publication Critical patent/DE3834883A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/13Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the tractive or propulsive power of vehicles
    • G01L5/136Force sensors associated with a vehicle traction coupling
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60DVEHICLE CONNECTIONS
    • B60D1/00Traction couplings; Hitches; Draw-gear; Towing devices
    • B60D1/58Auxiliary devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

A device is proposed for the determination of the shaft forces occurring between tractor (1) and trailer (2), in which strain-gauge measuring elements (17 and 18) are mounted on a cross-member (4) of the tractor (1). The cross-member (4) carries the coupling eye (11) of the vehicle coupling (11, 12, 13) and its bending stress during driving operation gives a measure of the shaft forces then occurring. <IMAGE>

Description

Stand der TechnikState of the art

Die Erfindung bezieht sich auf eine Vorrichtung zum Bestimmen der zwischen Zugwagen und Anhänger auftretenden Deichselkräfte mittels eines Sensors.The invention relates to a device for determining the drawbar forces occurring between the towing vehicle and the trailer by means of of a sensor.

Eine derartige Vorrichtung ist bekannt (DE-A 34 28 192). Bei dieser bekannten Vorrichtung ist der Sensor an der Deichsel des Anhängers angeordnet. Das hat den Nachteil, daß der Sensor dem rauhen Kuppel­ betrieb ausgesetzt ist und dann sehr leicht beschädigt werden kann.Such a device is known (DE-A 34 28 192). At this known device is the sensor on the drawbar of the trailer arranged. This has the disadvantage that the sensor is the rough dome operation is suspended and can then be easily damaged.

Vorteile der ErfindungAdvantages of the invention

Die eingangs genannte Vorrichtung mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß der Sensor vor Schlägen geschützt ist und daß er mit seinen elektrischen Anschlüs­ sen eindeutig und unveränderlich dem Zugwagen zugeordnet ist.The device mentioned at the outset with the characteristic features the main claim has the advantage that the sensor before It is protected against blows and that it has electrical connections is clearly and unchangeably assigned to the towing vehicle.

Desweiteren ist es von Vorteil, daß der Sensoreinbau unabhängig vom Kupplungshersteller ist.Furthermore, it is advantageous that the sensor installation is independent of Clutch manufacturer.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung darge­ stellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigenAn embodiment of the invention is shown in the drawing represents and explained in more detail in the following description. It demonstrate

Fig. 1 eine Draufsicht auf die Quertraverse und Fig. 2 eine Seitenansicht der Quertraverse (Fahrzeugkupplung im Schnitt) . Fig. 1 is a plan view of the crossbar and Fig. 2 is a side view of the crossbar (vehicle coupling in section).

Beschreibung des AusführungsbeispielsDescription of the embodiment

Am Ende eines nicht näher dargestellten Zugwagens 1, der zum Ziehen eines ebenfalls nicht näher dargestellten Anhängers 2 bestimmt ist, befindet sich an einem Fahrzeugrahmen 3 eine Quertraverse 4. Diese Quertraverse 4 ist im Querschnitt U-förmig ausgebildet und ist an ihren Schenkelenden 5 und 6 mit dem Fahrzeugrahmen 3 verschraubt. In ihrem Basisteil 7 trägt sie ein Loch 8 zur Aufnahme eines Kupplungs­ trägers 9, der einen Flansch 10 hat zur Aufnahme von vier Schrauben, mit denen der Kupplungsträger 9 über seinen Flansch 10 an der Quer­ traverse 4 befestigt ist (vgl. Fig. 2). Auf seiner dem Zugwagen 1 abgekehrten Seite ist der Kupplungsträger 9 mit einer Kupplungsöse 11 versehen, die zur Aufnahme eines Kupplungsbolzens 12 bestimmt ist, mit dem ein Deichselauge 13 einer Anhänger-Deichsel 14 und da­ mit der Anhänger 2 an den Zugwagen 1 anzuhängen bzw. anzukuppeln ist. Dabei bilden die Kupplungsöse 11, der Kupplungsbolzen 12 und das Deichselauge 13 die Fahrzeugkupplung 11, 12, 13.At the end of a towing vehicle 1, not shown, which is intended to tow a trailer 2 also not shown in detail, is located on a vehicle frame 3 is a cross-beam. 4 This crossbar 4 is U-shaped in cross section and is screwed to the vehicle frame 3 at its leg ends 5 and 6 . In their base portion 7 carries a hole 8 for receiving a coupling bracket 9 that has a flange 10 fixed for receiving four screws with which the clutch carrier 9 traverse its flange 10 on the cross-4 (see. Fig. 2) . On its side facing away from the towing vehicle 1 , the coupling carrier 9 is provided with a coupling eyelet 11 which is intended for receiving a coupling bolt 12 with which a tiller eye 13 of a trailer tiller 14 and there with the trailer 2 can be attached or coupled to the towing vehicle 1 is. The coupling eye 11 , the coupling pin 12 and the tiller eye 13 form the vehicle coupling 11 , 12 , 13 .

Die Quertraverse 4 hat zwei Bohrungen 15 und 16, in denen ein Paar Sensoren 17 und 18 angeordnet sind, die als Dehnungsmeßglieder aus­ gebildet sind. Damit dient die Quertraverse 4 in ihrer Gesamtheit als Meßstelle für die zwischen Zugwagen und Anhänger auftretenden Deichselkräfte. Vorzugsweise sind die beiden Dehnungsmeßglieder 17 und 18 symmetrisch zu der Befestigungsstelle, d.h. dem Loch 8 für den Kupplungsträger 9 angeordnet. The crossbar 4 has two bores 15 and 16 , in which a pair of sensors 17 and 18 are arranged, which are formed as strain gauges. The cross-member 4 thus serves in its entirety as a measuring point for the drawbar forces occurring between the towing vehicle and the trailer. Preferably, the two strain gauges 17 and 18 are arranged symmetrically to the fastening point, ie the hole 8 for the coupling carrier 9 .

Beim Ausführungsbeispiel ist das Paar von Dehnungsmeßgliedern 17 und 18 in einer Ebene der Quertraverse 4 angeordnet, in der auch die Be­ festigungsstelle (Loch 8) für den Kupplungsträger 9 liegt (vgl. Fig. 2). Es ist aber auch denkbar, die Dehnungsmeßglieder 17 und 18 mindestens zum Teil an den Schenkeln der Quertraverse 4 anzuordnen. Auch können, bei Bedarf, mehr als ein Paar von Dehnungsmeßgliedern Anwendung finden.In the embodiment, the pair of strain gauges 17 and 18 is arranged in a plane of the crossbar 4 , in which also the fastening point (hole 8 ) for the coupling carrier 9 is located (see. Fig. 2). However, it is also conceivable to arrange the strain gauges 17 and 18 at least in part on the legs of the crossbar 4 . Also, if necessary, more than one pair of strain gauges can be used.

Außen in der Quertraverse 4 sind zwei Durchgangsbohrungen 20 und 21 vorgesehen, die zur Aufnahme von Steckdosen für die elektrische Überwachung des Wagenzuges bestimmt sind.Outside in the crossbar 4 , two through holes 20 and 21 are provided, which are intended for receiving sockets for the electrical monitoring of the wagon train.

WirkungsweiseMode of action

Wenn beim angekuppeltem Anhänger 2 an der Quertraverse 4 Zug- oder Druckkräfte auftreten, versuchen diese, die Quertraverse 4 zu ver­ biegen. Dabei entstehen in der Quertraverse 4 Spannungen, die durch die Dehnungsmeßglieder 17 und 18 erfaßt, in einer elektronischen Einrichtung ausgewertet und zu Signalen für die auf dem Zugwagen und dem Anhänger angeordneten Bremssteuerventile verarbeitet werden. Treten seitliche Kräfte auf, so gewährleistet die Anordnung mehrerer Dehnungsmeßglieder einen Ausgleich, und es werden Fehler, die bei der Verrechnung solcher Falschsignale eventuell auftreten können, verringert.If tensile or compressive forces occur on the crossbar 4 when the trailer 2 is coupled, they try to bend the crossbar 4 . This creates 4 voltages in the cross-beam, which are detected by the strain gauges 17 and 18 , evaluated in an electronic device and processed into signals for the brake control valves arranged on the towing vehicle and the trailer. If lateral forces occur, the arrangement of several strain gauges ensures compensation, and errors that can possibly occur when such false signals are calculated are reduced.

Claims (4)

1. Vorrichtung zum Bestimmen der zwischen Zugwagen und Anhänger auf­ tretenden Deichselkräfte mittels eines Sensors, der als Dehnungsmeß­ stelle ausgebildet ist, dadurch gekennzeichnet, daß als Meßstelle der eine Fahrzeugkupplung (11, 12, 13) tragende Rahmen-Teil, insbe­ sondere die Quertraverse (4), des Zugfahrzeuges (1) verwendet ist.1. Device for determining the drawbar forces between the towing vehicle and trailer by means of a sensor which is designed as a strain gauge, characterized in that the measuring point of a vehicle coupling ( 11 , 12 , 13 ) carrying frame part, in particular the special cross member ( 4 ), the towing vehicle ( 1 ) is used. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Fahrzeugkupplung (11, 12, 13) eine mittig an der Quertraverse (4) vorgesehene Befestigungsstelle (Loch 8) hat und daß mehrere Deh­ nungsmeßglieder (17 und 18) verwendet sind, die symmetrisch zu der Befestigungsstelle angeordnet sind.2. Apparatus according to claim 1, characterized in that the vehicle coupling ( 11 , 12 , 13 ) has a centrally on the crossbar ( 4 ) provided mounting point (hole 8 ) and that several strain gauges ( 17 and 18 ) are used, which are symmetrical are arranged to the attachment point. 3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß minde­ stens ein Paar von Dehnungsmeßgliedern (17, 18) verwendet ist, das in einer Ebene der Quertraverse (4) angeordnet ist, in der auch die Befestigungsstelle (Loch 8) für die Fahrzeugkupplung (11, 12, 13) liegt.3. Apparatus according to claim 2, characterized in that at least a pair of strain gauges ( 17 , 18 ) is used, which is arranged in a plane of the crossbar ( 4 ) in which the fastening point (hole 8 ) for the vehicle coupling ( 11 , 12 , 13 ). 4. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Quertraverse (4) U-förmig ausgebildet ist und daß die Dehnungsmeß­ glieder (17, 18) mindestens zum Teil an den U-Schenkeln der Quer­ traverse (4) angeordnet sind.4. The device according to claim 2, characterized in that the crossbar ( 4 ) is U-shaped and that the strain gauges ( 17 , 18 ) are arranged at least in part on the U-legs of the crossbar ( 4 ).
DE3834883A 1988-10-13 1988-10-13 Device for the determination of shaft forces Withdrawn DE3834883A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE3834883A DE3834883A1 (en) 1988-10-13 1988-10-13 Device for the determination of shaft forces
IT02198689A IT1236549B (en) 1988-10-13 1989-10-11 DEVICE FOR DEFINING FORCES ON THE RUDDER BETWEEN TRACTOR AND TRAILER.
FR898913455A FR2637981B3 (en) 1988-10-13 1989-10-13 DEVICE FOR DETERMINING THE FORCES TRANSMITTED BY A HANDLE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3834883A DE3834883A1 (en) 1988-10-13 1988-10-13 Device for the determination of shaft forces

Publications (1)

Publication Number Publication Date
DE3834883A1 true DE3834883A1 (en) 1990-04-19

Family

ID=6365040

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3834883A Withdrawn DE3834883A1 (en) 1988-10-13 1988-10-13 Device for the determination of shaft forces

Country Status (3)

Country Link
DE (1) DE3834883A1 (en)
FR (1) FR2637981B3 (en)
IT (1) IT1236549B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4014312A1 (en) * 1990-05-04 1991-11-07 Wabco Westinghouse Fahrzeug Trailer coupling connector to vehicle part - contains pressure sensor measuring pressure of incompressible fluid between force transfer surfaces
DE4212161A1 (en) * 1992-04-10 1993-10-14 Klaus Maier Vehicle semi-trailer, e.g. for transporting boat or camping equipment - has brakes controlled by thrust on trailer king-pin measured by resistance strain gauges
DE19708144A1 (en) * 1997-02-28 1998-09-03 Itt Mfg Enterprises Inc Procedure for avoiding pendulum movements of the drawbar of a motor vehicle trailer
DE29901871U1 (en) 1999-02-04 1999-04-29 Küster & Co GmbH, 35630 Ehringshausen Parking brake system for motor vehicles with detection of a trailer load
DE20316698U1 (en) * 2003-10-30 2005-03-17 Knott Gmbh Trailer towing bar with sway control, has device for monitoring damping produced by stabilizing device by measuring damping force or moment
DE102010043964A1 (en) * 2010-11-16 2012-05-16 Scambia Industrial Developments Aktiengesellschaft support device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29606636U1 (en) * 1996-04-12 1996-07-25 BPW Bergische Achsen KG, 51674 Wiehl Device for receiving a trailer coupling

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4014312A1 (en) * 1990-05-04 1991-11-07 Wabco Westinghouse Fahrzeug Trailer coupling connector to vehicle part - contains pressure sensor measuring pressure of incompressible fluid between force transfer surfaces
DE4212161A1 (en) * 1992-04-10 1993-10-14 Klaus Maier Vehicle semi-trailer, e.g. for transporting boat or camping equipment - has brakes controlled by thrust on trailer king-pin measured by resistance strain gauges
DE4212161C2 (en) * 1992-04-10 1998-02-19 Klaus Maier Semi-trailer with an overrun braking system
DE19708144A1 (en) * 1997-02-28 1998-09-03 Itt Mfg Enterprises Inc Procedure for avoiding pendulum movements of the drawbar of a motor vehicle trailer
DE29901871U1 (en) 1999-02-04 1999-04-29 Küster & Co GmbH, 35630 Ehringshausen Parking brake system for motor vehicles with detection of a trailer load
DE20316698U1 (en) * 2003-10-30 2005-03-17 Knott Gmbh Trailer towing bar with sway control, has device for monitoring damping produced by stabilizing device by measuring damping force or moment
DE102010043964A1 (en) * 2010-11-16 2012-05-16 Scambia Industrial Developments Aktiengesellschaft support device
US9150061B2 (en) 2010-11-16 2015-10-06 Scambia Holdings Cyprus Limited Carrier device

Also Published As

Publication number Publication date
IT1236549B (en) 1993-03-11
FR2637981B3 (en) 1990-10-05
IT8921986A0 (en) 1989-10-11
FR2637981A3 (en) 1990-04-20
IT8921986A1 (en) 1991-04-11

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8139 Disposal/non-payment of the annual fee