WO2022122096A1 - Butée de mesure et frein à tambour ayant une butée de mesure - Google Patents

Butée de mesure et frein à tambour ayant une butée de mesure Download PDF

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Publication number
WO2022122096A1
WO2022122096A1 PCT/DE2021/200241 DE2021200241W WO2022122096A1 WO 2022122096 A1 WO2022122096 A1 WO 2022122096A1 DE 2021200241 W DE2021200241 W DE 2021200241W WO 2022122096 A1 WO2022122096 A1 WO 2022122096A1
Authority
WO
WIPO (PCT)
Prior art keywords
measuring
base
abutment
brake
head
Prior art date
Application number
PCT/DE2021/200241
Other languages
German (de)
English (en)
Inventor
Christian Vey
Verena Freund
Martin GÄDKE
Ahmed Sefo
Jens Hoffmann
Uwe Bach
Adrian Messner
Matthias Schulitz
Original Assignee
Continental Teves Ag & Co. Ohg
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 Continental Teves Ag & Co. Ohg filed Critical Continental Teves Ag & Co. Ohg
Publication of WO2022122096A1 publication Critical patent/WO2022122096A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D51/00—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like
    • F16D51/46—Self-tightening brakes with pivoted brake shoes, i.e. the braked member increases the braking action
    • F16D51/48—Self-tightening brakes with pivoted brake shoes, i.e. the braked member increases the braking action with two linked or directly-interacting brake shoes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
    • F16D2066/005—Force, torque, stress or strain

Definitions

  • the invention relates to a novel measuring abutment, in particular for supporting the ends of the brake shoes of a drum brake, and to a drum brake with a measuring abutment.
  • a measuring abutment with optical sensors used for a vehicle brake is specified in EP 0 388 040 A2.
  • the vehicle brake has a fixed, braking force absorbing part (brake stator) which carries at least one friction element and an actuating member which is suitable and intended for pressing the friction element into braking engagement with a rotatable braking surface (brake rotor), and wherein a deflectable means is defined arranged in the power transmission path between the friction element and the brake stator such that it is subjected to the load passing through the friction element during braking and the deflectable means is deflected by the braking load.
  • the vehicle brake is connected to a remote electronics unit via two fiber optic cables, and one fiber optic cable is used to cause a light emitting diode in the electronics unit to illuminate the vehicle brake deflectable means.
  • a part of the radiation that is reflected or deflected depending on the load is reported back to the electronic unit via the other optical fiber cable, which has electrical sensors in order to emit an electrical output signal for further use in a vehicle system.
  • the invention is based on the object of creating an improved arrangement with a robust measuring abutment, which enables improved production, logistics and assembly and with sufficiently precise data being able to be obtained with relatively little measuring effort.
  • the invention provides that the measuring abutment (5) is defined as an electrical wheel measuring assembly which integrates both the measuring abutment (5) and an electrical signal generator/signal generator.
  • the measuring abutment is therefore arranged as a unit that is easy to handle and can be connected directly to an electrical vehicle system, and the functionality of an individual wheel measuring unit can be easily checked electrically in advantageous industrial production based on the division of labor (at a component supplier company) without having to carry out system assembly.
  • the present invention defines for the first time a new, contemporary modular design in connection with electrical sensors.
  • the measuring abutment has a base and a head, which is connected to the base via at least one elastically resilient arm extending from the top of the base, and that a measuring rod extends from the head runs to the bottom of the base.
  • the base z. B. have an opening through which the measuring rod is passed.
  • the forces to be measured are introduced into the head, as a result of which the arm bends under the effect of these forces.
  • the head experiences a change in position, which is transferred to the measuring rod, with the free end of the measuring rod possibly experiencing a greater offset than the head itself, depending on the selected geometry.
  • Measuring the offset of the free end of the measuring rod using simple means can be carried out, it allows to determine the forces acting on the counter bearing.
  • a suitable design of the abutment is that the base is connected to the head by a single arm, the arm and the base having a channel running in the longitudinal direction of the arm, which runs through the base and the arm to the head, and that the measuring rod is arranged in the channel.
  • the measuring rod is protected against damage in the channel, so that bending of the measuring rod, which would otherwise lead to a measurement error, is not to be expected.
  • the measuring rod is also protected from direct influences from the braking area, such as thermal radiation, dust and the like, so that no separate sealing is required.
  • the head preferably has two lateral projections which are designed to introduce force.
  • Another possible embodiment provides that two arms are provided, the ends of which are remote from the base are connected to one another via a bridge forming the head of the measuring abutment, the measuring rod being fastened at one end to the underside of the bridge and at the other end to the underside of the base runs.
  • the base, the two arms and the bridge form a frame, with the end regions of the arms remote from the base being designed for the introduction of force.
  • a signal transmitter is attached there, which interacts with a signal receiver attached to the base in order to determine the offset of the free end of the measuring rod relative to the base.
  • the base, the arm or arms and the head are made in one piece.
  • the invention further relates to a drum brake, in particular of the servo brake type, with a brake drum and two brake shoes which can be placed on a brake drum and are held on the brake shoe side of an anchor plate, which brake shoes each have a first and a second end and have supports or supports at their first ends.
  • Possessing lugs with a spreading device and an abutment between the first ends, on which the supports/lugs can be supported, and between the second ends a floatingly mounted transmitter.
  • a drum brake such as in particular a servo brake
  • the braking forces are transmitted from a primary brake shoe via the transmitter and via the secondary Transfer the brake shoe to the abutment, which is thus loaded on one side or the other depending on the direction of travel of the vehicle to be braked.
  • the invention provides that the abutment is designed as a measuring abutment and is therefore provided with a force measuring device for determining the forces acting on the abutment during braking.
  • a counter bearing is known from EP 0 388 040 A2, described in connection with a simplex brake, in which the counter bearing is inserted between the second ends of the brake shoes, where the floating transmitter is located in the case of a servo brake.
  • the measuring abutment is preferably designed as a whole as a component that can be elastically deformed under the action of a force, with one or more sensors being provided which detect a deformation of the measuring abutment occurring under the action of a force.
  • Measuring thrust blocks can be used for servo brakes as well as for other types of drum brakes. This also applies to the counter bearing described below.
  • thrust block suitable for use in a servo brake or other types of drum brakes, is a thrust block that consists of a base attached to the anchor plate and a head that has an arm extending from the top of the base connected to the base, the head being formed by an arcuate extension, the free end of which points towards the base, and in that a measuring rod extends from the free end of the extension and extends to the underside of the base.
  • the head has, following an arcuate section, an end section running parallel to the arm, the nose of one brake shoe being in contact with the arm and the nose of the other brake shoe being in contact with the end section of the head.
  • the base is attached to the outside of the anchor plate with the arm or arms protruding through an opening in the anchor plate to the shoe side of the anchor plate.
  • FIG. 1 shows a perspective representation of a drum brake with a first embodiment of a measuring abutment
  • FIG. 4 shows a schematic representation of the deformation of the measuring abutment according to FIG. 3 under the action of a force
  • FIG. 5 shows a cross section through a second embodiment of a measuring abutment
  • FIG. 6 shows a schematic representation of the deformation of the measuring abutment according to FIG. 5 under the action of a force
  • FIG. 7 shows the arrangement of a sensor device below the base using the example of the embodiment of the measuring abutment according to FIG. 2,
  • FIG. 8 shows a schematic representation of a third embodiment of a measuring abutment
  • FIG. 9 shows a schematic representation of the deformation of the measuring abutment according to FIG. 8 under the action of a force.
  • FIG. shows the structure of a drum brake of the servo brake type, but without a brake drum.
  • the measuring thrust bearing 5 is defined as an electrical wheel measuring assembly which includes both the measuring thrust bearing 5 and an electrical signal generator/ Signal generator, ie ultimately electrical sensors integrated in a modular design.
  • the procedure for determining the supporting force is as follows:
  • the measuring abutment 5 according to FIGS. 2 and 3 has an elongate base 10 from the central region of which an arm 11 protrudes perpendicularly. This arm 11 merges into a head 12 .
  • the two lugs 7 and 8 of the brake shoes 2 and 3 are placed on the side surfaces of the projections 13, 14 facing away from the arm 11 (see FIG. 1).
  • FIG. 3 there is a channel 15 in the arm 11 which extends from the underside of the base 10 to the tip of the head 12.
  • this channel 15 there is a measuring rod 16 which is fastened in the head 12 and runs through the channel 15 and protrudes below the underside of the base 10 .
  • FIG. 1 Another embodiment of the measuring abutment is shown in FIG.
  • Two arms 20, 21 are provided here, which extend parallel to one another starting from the base 10 and are connected one behind the other at their ends via a bridge 22.
  • the base 10, the two arms 20 and 21 and the bridge 22 form an approximately rectangular frame.
  • a measuring rod 16 is attached to the underside of the bridge 22 and protrudes through an opening in the base 10 beyond the underside of the base.
  • the frame With a one-sided load, which is indicated by an arrow, the frame experiences a shear (see Fig. 6) so that it forms a parallelogram. As a result, the measuring rod 16 is displaced parallel to the base 10.
  • FIGS. 8 and 9 A third embodiment of the measuring abutment is shown in FIGS. 8 and 9 together with FIG.
  • a single stable arm 11 is provided, which merges into an extension consisting of a flexible curved section 30 and an adjoining end section 31 which runs parallel to the arm 11 .
  • a measuring rod 16 At the free end of the end section 31 there is in turn a measuring rod 16 which is guided through an opening in the base 10 .
  • the two brake shoes 2, 3 and their lugs 7, 8 rest on the one hand on the arm 11 and on the other hand on the end section 31.
  • the curved section 30 in particular is bent further, so that the end section 31 and the measuring rod 16 connected to it are positioned at an angle towards the arm 11 .
  • This is arranged in such a way that the brake shoe acting as the secondary brake shoe during forward braking bears against the end section 31 , while the other brake shoe, the primary brake shoe, bears against the arm 11 .
  • the force on the measuring abutment can be measured both when braking backwards and when braking forwards, this is only possible in the embodiment according to FIGS. 8 and 9 for one direction, preferably when braking forwards .
  • a signal transmitter for example a magnet.
  • a signal receiver for example an inductive sensor, is arranged on the underside of the base 10 opposite the measuring tip 17 .
  • the electrical signal generator or signal receiver is arranged in a housing 32 as shown in particular in FIG.
  • the housing 32 is attached to the underside of the base 10 . Accordingly, an independently manageable electro-micromechanical assembly for force measurement and/or torque measurement is defined in connection with the components of a measuring abutment 5 in order to form an independently manageable wheel measurement assembly. As can be seen from Fig.
  • each measuring abutment 5 is fastened to the rear of the anchor plate 1, with the partial component of the measuring abutment 5 being able to be pushed through an opening in the anchor plate 1 to its brake shoe side in order to be there between the supports/noses 7 and 8 of the brake shoes 2, 3 to be arranged.
  • the measuring abutment is thus located directly next to the brake cylinder 4.
  • each measuring abutment 5, or its signal generator/signal receiver - i.e. each wheel measuring assembly - is electrically connected to an electronic vehicle brake system, such as in particular to an electronic brake control unit ECU connected is.
  • a particularly robust electrical signal path is presented with a particularly conveniently placed electrical interface, and the interface is rationally and directly incorporated into the vehicle manufacturer's existing electrical vehicle wiring harness architecture.
  • Optical wiring in the wheel brake area has been streamlined.
  • the present invention allows the vehicle manufacturer a particularly favorable cable harness assembly based on its improved and in particular electrical interface allocation, ie improved electronics integration in connection with an electrical wheel measuring unit with the added value of detecting individually detected wheel brake forces and/or wheel brake torques.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)

Abstract

De façon à déterminer une force de freinage, en particulier dans un frein à tambour assisté, une butée de mesure est prévue entre les extrémités des segments de frein du frein à tambour entre lesquelles est également situé un élément d'écartement. L'invention prévoit pour la première fois un composant de mesure de roue électrique qui est défini comme un composant électrique-micromécanique, qui peut être produit de manière efficace, c'est-à-dire indépendamment, et qui peut être facilement géré sur le plan logistique en tant que composant et avantageusement monté.
PCT/DE2021/200241 2020-12-11 2021-12-06 Butée de mesure et frein à tambour ayant une butée de mesure WO2022122096A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020133109.6A DE102020133109B4 (de) 2020-12-11 2020-12-11 Messwiderlager und Trommelbremse mit einem Messwiderlager
DE102020133109.6 2020-12-11

Publications (1)

Publication Number Publication Date
WO2022122096A1 true WO2022122096A1 (fr) 2022-06-16

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PCT/DE2021/200241 WO2022122096A1 (fr) 2020-12-11 2021-12-06 Butée de mesure et frein à tambour ayant une butée de mesure

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WO (1) WO2022122096A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022212689A1 (de) 2022-02-14 2023-08-17 Continental Automotive Technologies GmbH Bremslastmesseinrichtung für eine elektrische Kraftfahrzeugradbremse, Herstellungsverfahren dazu und elektrische Kraftfahrzeugradbremse mit Bremslastmesseinrichtung
WO2023151769A1 (fr) 2022-02-14 2023-08-17 Continental Automotive Technologies GmbH Dispositif de mesure de charge de freinage pour un frein sur roues électrique de véhicule à moteur, procédé de fabrication associé et frein sur roues électrique de véhicule à moteur doté d'un dispositif de mesure de charge de freinage

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0388040A2 (fr) 1989-03-17 1990-09-19 LUCAS INDUSTRIES public limited company Frein de véhicule
DE102017217410A1 (de) * 2017-09-29 2019-04-04 Continental Teves Ag & Co. Ohg Trommelbremse
DE102018222125B3 (de) * 2018-12-18 2020-04-02 Continental Teves Ag & Co. Ohg Trommelbremse
DE102019207661A1 (de) * 2019-05-24 2020-11-26 Continental Teves Ag & Co. Ohg Trommelbremse

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0388040A2 (fr) 1989-03-17 1990-09-19 LUCAS INDUSTRIES public limited company Frein de véhicule
DE102017217410A1 (de) * 2017-09-29 2019-04-04 Continental Teves Ag & Co. Ohg Trommelbremse
DE102018222125B3 (de) * 2018-12-18 2020-04-02 Continental Teves Ag & Co. Ohg Trommelbremse
DE102019207661A1 (de) * 2019-05-24 2020-11-26 Continental Teves Ag & Co. Ohg Trommelbremse

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DE102020133109B4 (de) 2023-01-05
DE102020133109A1 (de) 2022-06-15

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