WO2017012751A1 - Dispositif de mesure pour mesurer le couple de rotation sur un arbre, mécanisme bielle-manivelle et véhicule - Google Patents

Dispositif de mesure pour mesurer le couple de rotation sur un arbre, mécanisme bielle-manivelle et véhicule Download PDF

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Publication number
WO2017012751A1
WO2017012751A1 PCT/EP2016/061738 EP2016061738W WO2017012751A1 WO 2017012751 A1 WO2017012751 A1 WO 2017012751A1 EP 2016061738 W EP2016061738 W EP 2016061738W WO 2017012751 A1 WO2017012751 A1 WO 2017012751A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaft
guide sleeve
outer peripheral
peripheral surface
sensor holder
Prior art date
Application number
PCT/EP2016/061738
Other languages
German (de)
English (en)
Inventor
Christoph Zimmermann
Uwe Kaechele
Julian Binder
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
Publication of WO2017012751A1 publication Critical patent/WO2017012751A1/fr

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
    • G01L3/101—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means
    • G01L3/102—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means involving magnetostrictive means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J45/00—Electrical equipment arrangements specially adapted for use as accessories on cycles, not otherwise provided for
    • B62J45/40—Sensor arrangements; Mounting thereof
    • B62J45/41—Sensor arrangements; Mounting thereof characterised by the type of sensor
    • B62J45/411—Torque sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J45/00—Electrical equipment arrangements specially adapted for use as accessories on cycles, not otherwise provided for
    • B62J45/40—Sensor arrangements; Mounting thereof
    • B62J45/42—Sensor arrangements; Mounting thereof characterised by mounting
    • B62J45/421—Sensor arrangements; Mounting thereof characterised by mounting at the pedal crank
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M6/00—Rider propulsion of wheeled vehicles with additional source of power, e.g. combustion engine or electric motor
    • B62M6/40—Rider propelled cycles with auxiliary electric motor
    • B62M6/45—Control or actuating devices therefor
    • B62M6/50—Control or actuating devices therefor characterised by detectors or sensors, or arrangement thereof
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
    • G01D11/24—Housings ; Casings for instruments
    • G01D11/245—Housings for sensors

Definitions

  • Measuring arrangement for measuring the torque on a shaft, crank mechanism and vehicle
  • the present invention relates to a measuring arrangement for measuring the torque on a shaft, a crank mechanism, and a vehicle. It relates in particular to a measuring arrangement for measuring the torsional moment of a shaft, a crank drive for a vehicle operable with muscle power and / or engine power and a vehicle operable with muscle power and / or engine power.
  • Electric and / or powered by muscle power vehicles are known from the prior art in different configurations. In such vehicles, it is often desirable to determine a torque or torque acting on a shaft. The effect of the
  • Magnetostriction, magnetoelasticity or the inverse magnetostriction or magnetoelasticity are exploited. This effect is due to the deformation of magnetic, in particular ferromagnetic substances due to an applied magnetic field. A corresponding body undergoes an elastic change in length at a constant volume. Conversely, in the case of inverse magnetostriction or magnetoelasticity, the magnetic properties are changed by an impressed change in length or shape.
  • a part of the wave is formed with or from a material showing the effect of inverse magnetostriction or magnetoelasticity.
  • Measurement deviations of the sensor signal occur, which are caused by a different distance or air gap between the sensor and the sensor shaft.
  • the measurement arrangement according to the invention with the features of independent claim 1 has the advantage that the distance or air gap between the sensor holder and the sensor on the one hand and the shaft to be measured on the other hand can be formed particularly small or even minimized and that its changes when rotating the shaft also special kept low or even compensated. This will
  • a measuring arrangement for measuring the torque on a shaft and in particular of the torsional torque of the shaft which is formed with a sensor device which is adapted to measure a magnetic field carried or generated by the shaft, with a sensor holder for holding the sensor device and the Arrangement of the sensor device with respect to a region of an outer circumferential surface of the shaft and with at least one guide sleeve which is arranged, the
  • Housing assembly and resulting from manufacturing tolerances can be compensated according to the invention by the combination of sensor holder and guide sleeve errors in the concentricity and inclinations of the shaft and angle error.
  • the spatial proximity of the sensor device and the constancy of the distance between the sensor device and the region of the outer circumferential surface of the shaft are ensured in a particularly simple manner by embracing the shaft through the guide sleeve.
  • the magnetic field carried or generated by the shaft for determining the torque or torsional moment of the shaft is particularly reliable and enhanced
  • the guide sleeve is formed as a hollow cylinder and it comprises or surrounds the outer peripheral surface of the shaft. This can be the
  • the guide sleeve has a circumferential inner surface, which faces the outer peripheral surface of the shaft.
  • the circumferential inner surface has or forms at least one bearing point.
  • the at least one bearing point is arranged on the outer peripheral surface of the shaft as a contact point in
  • Embodiment provided that bearings or contact points are formed as inserted into the guide sleeve elements.
  • the contact points are designed as slide bearings and / or sliding bushes, preferably as elements inserted into the sensor holder and / or in that the sensor holder as a whole or a portion of the sensor holder facing the shaft is formed with or from a sliding material.
  • a particularly simple assembly of the measuring arrangement according to the invention results from the fact that the plain bearings and / or sliding bushes are formed as part of circle segments each with an arc of less than 180 °.
  • the reliability of the measuring arrangement according to the invention can be increased by an anti-rotation is formed, a co-rotation of the
  • the rotation can be part of the sensor holder and / or have one or more holes or ribs.
  • the measuring arrangement according to the invention adjusts itself in that the area of the outer peripheral surface of the shaft is defined by a torsion element, in particular by a torsion shaft, with or out of a magnetostrictive and / or
  • magnetoelastic material is formed, which is set up for
  • Torque transmission as an intermediate shaft piece between the first and second shaft portions of the shaft.
  • the use of a magnetostrictive and / or magnetoelastic material enables a very accurate determination of the torque to be transmitted or the experienced torsional moment of the shaft via a corresponding calibration.
  • the manufacture and assembly of the measuring arrangement according to the invention can be further simplified if a particularly small number of individual components to be produced and assembled are formed. This can be achieved in that the guide sleeve is connected to the sensor holder, in particular in centrein Glaiger form, and / or that the guide sleeve has a receiving area, which is for receiving and holding the
  • crank mechanism for a vehicle operable with muscular and / or motive power, and more particularly for an electric bicycle having a shaft adapted for receiving and rotationally fixed coupling with at least one torque transmission crankshaft. Furthermore, one is
  • Measuring device designed to measure the torque on the shaft and in particular of the torsional moment of the shaft.
  • the present invention provides a
  • Muscle force and / or engine power operable vehicle in particular an electric bicycle.
  • This comprises a crank mechanism according to the invention, an electric drive, which is arranged in particular in the region of the crank mechanism, and a control unit, which is used to control the electric
  • Figure 1 is a schematic representation of an example of a
  • Measuring arrangement once as a cross section and once as a longitudinal section with respect to the underlying shaft
  • Figures 4 and 5 show perspective and transverse to the shaft or longitudinally sectioned views of an embodiment which can be further developed with a measuring arrangement according to the invention.
  • FIGS 6 and 7 show in more schematic and also in
  • the electric bicycle 1 comprises a crank mechanism 2 with two cranks 7, 8, on which pedals are arranged.
  • An electric drive 3 is integrated in the crank mechanism 2.
  • a gear shift 6 is arranged at the rear wheel 9.
  • a drive torque which is provided by the driver and / or by the electric drive 3, is transmitted from a chainring 4 on the crank mechanism 2 via a chain 5 to pinions of the gear shift 6.
  • a control unit 10 On the handlebar of the bicycle, a control unit 10 is further arranged, which is connected to the electric drive 3.
  • the reference numeral 1 1 denotes a battery which serves to supply power to the electric drive 3.
  • Integrated in the frame 12 is the crank bearing 15 or bottom bracket, which has a crankcase 60, in the interior of which an embodiment of the measuring arrangement according to the invention is formed.
  • Figures 2 and 3 show schematically a transverse or longitudinal section of an embodiment of the measuring arrangement 100 according to the invention, in each case with respect to an underlying shaft 16. Shown is a state in which the measuring arrangement 100 in the crankcase 60 of a crank bearing 15 or Bottom bracket is mounted.
  • the measuring arrangement 100 of this embodiment has a sensor holder 20.
  • This may also be referred to as a sensor housing and takes in its interior 20i a sensor device 30, e.g. in form of
  • the sensor holder 20 faces a shaft 16 with a part of its outer side 20a and is arranged in spatial proximity to a section 17a of an outer circumferential surface 17 of the shaft 16 with a gap 50 in the form of an air gap therebetween.
  • the sensor device 30 is in relative proximity to the region or section 17a of the outer peripheral surface 17 of the shaft 16.
  • the sensor device 30 can thus measure the magnetic properties and in particular the magnetic field and / or field changes carried or generated by the shaft 16 in the region 17a.
  • the one guide sleeve 41 is formed.
  • FIGS. 2 and 3 show that the guide sleeve 41 in this
  • Embodiment is substantially of a circular cylindrical shape.
  • a receptacle 43 is formed, on which the housing of the sensor holder 20 is mounted.
  • the guide sleeve 41 forms a kind of shoulder or shoulder 40 with a planar region on which the receptacle 43 is mounted and on which during assembly of the sensor holder 20 is placed with its lower portion and the sensor device 30 in its interior 20i.
  • Guide sleeve 41 is rotationally symmetrical to the axis of rotation X of the shaft 16 and the torsion element 18 is formed.
  • the guide sleeve 41 has an inner surface 45, which faces the shaft 16 and the portion 17 a of the outer peripheral surface 17, which are formed in this point by the torsion element 18.
  • the shoulder 40 is formed with the receptacle 43 for the sensor holder 20.
  • At least one bearing 42 is further formed on the inner surface 45 of the guide sleeve 41 in the manner of a sliding bearing.
  • the shaft 16 is rotationally symmetrical about its axis of rotation X and rotatable about this axis of rotation X.
  • the shaft 16 in this embodiment consists of a first and a second shaft portion 16-1 and 16-2, respectively, which serve for torque transmission. Between the first shaft portion 16-1 and the second
  • Shaft section 16-2 is for torque transmission between them
  • Shaft sections 16-1, 16-2 arranged the torsion element 18, which may also be referred to as a torsion shaft.
  • the torsion element is formed with or from a magnetostrictive and / or magnetoelastic material.
  • Shaft sections 16-1 and 16-2 is thus also the torsion element 18 this subjected to transmitting torque, which acts there as a torsional moment.
  • the torque thus leads to a deformation in the sense of a torsion of the torsion element 18.
  • This change in the magnetic field can be measured by the sensor device 30 and the magnetic field sensor. From the measurement of the magnetic field change conclusions can then be drawn on the actually acting torsional or torque transmitted.
  • a gap or gap 50 with gap spacing or gap width d is formed between the sensor holder 20 and the shaft 16. Due to the pressure force of the force element 41 and the pressure of the outer side 20a against the region 17a of the outer peripheral surface 17 of the shaft 16 and in particular of the torsion element 18, this gap width d of the gap 50 is kept constant and in particular low, compared to a corresponding arrangement without a force element 41 ,
  • the sensor holder 20 forms for this purpose a bearing point 42 in the sense of a sliding bearing relative to the region 17a of the outer peripheral surface 17 of the shaft 16.
  • the guide sleeve 41 and the bearing 42 may in combination as a holding and bearing assembly 40 for the sensor holder 20 at the area 17 a of
  • Outer peripheral surface 17 of the shaft 16 can be understood.
  • FIGS. 4 and 5 show an embodiment of a crankcase 60, which can be developed according to the invention.
  • Measuring arrangement 100 also disposed in the interior 60i of a crankcase 60.
  • the torsion element 18 is as
  • Torsionshülse formed and via first and second teeth 81 and 82 with the crankshaft 16 for torque introduction and with a Gear element connected to the torque output.
  • the transmission element may include, for example, a gear, a freewheel, a clutch or the like.
  • a gap 50 is provided, which is constant in its width d temporally constant and / or - compared to a corresponding arrangement without guide sleeve 41 - by the inventive design of the guide sleeve.
  • Figures 6 and 7 show a schematic and perspective as well as partially sectioned view of another embodiment of the
  • Measuring arrangement 100 according to the invention.
  • the holding and bearing assembly 40 is formed by the bearings 42 and the guide sleeve 41.
  • the bearings 42 ensure between the
  • the guide sleeve 41 encloses or comprises with its inner surface 45 and the region 17 a of the outer peripheral surface 17 of the shaft 16 and of the torsion element 18
  • the guide sleeve is optionally supported on the bearings 42, thereby causing alignment of the sensor holder 20 and the sensor device 30 relative to the outer peripheral surface 17 of the shaft 16 and the torsion element 18.
  • crankcase 60 ensures a rotationally fixed position of the sensor holder 20 in the crankcase 60 and with respect to the shaft 16 and the torsion 18th
  • the sensor holder 20 is provided with a sensor head and can be aligned and positioned on the shaft 16 as a sensor shaft by a guide sleeve 41 supported in or on its housing.
  • the guide sleeve 41 may be formed as a continuous substantially cylindrical sleeve. It is also conceivable to form the guide sleeve 41 with two half-shell-shaped bearing shells. The half-shell bearing shells of the guide sleeve completely enclose the shaft 16 as a whole. The bearing shells can facilitate assembly.
  • the bearings 42 provide contact points between the shaft 16 and the guide sleeve 41 and can be performed as inserted into the guide sleeve 41 plain bearings or sliding bushes, which in section, for example. as part of the circle pieces have a maximum angle of 180 °.
  • the guide sleeve 41 may consist entirely of a sliding material, preferably of a plastic. But it can also be formed of two components, for example, a sliding material for the
  • the embodiment of the anti-rotation device 70 in the form of a pair of two holes can be seen, with the aid of the sensor holder 20, for example, on the crankcase 60 of the crank bearing 15 can be mounted rotationally fixed.
  • Sensor holder 20 with a sensor head that is equipped with a corresponding sensor device 30. Subsequently, the sensor holder 20 placed over the receptacle 43 of the guide sleeve 41 on the guide sleeve 41 and fixed there.
  • the bearings 42 mounted in the guide sleeve 41 provide contact points between the torsion element 18 of the shaft 16 and the sensor holder 20 with guide sleeve 41.
  • the undersize between the outer diameter of the shaft 16 and in particular of the torsion element 18 and the inner diameter of the bearings 42 forms in Dependence of the manufacturing tolerances the maximum bearing play. This can also assume the value zero.
  • the guide sleeve 41 may be formed of a carrier material of higher strength and / or rigidity and be fitted with inserted bearings 42 made of a suitable material.
  • the guide sleeve 41 may be formed of a carrier material of higher strength and / or rigidity and be fitted with inserted bearings 42 made of a suitable material.
  • anti-rotation device 70 may serve, for example, two holes that specify a provisional position of the sensor holder 20 in the housing 60.
  • ribs or individual bores can serve as anti-rotation device 70.
  • magnetostrictive and / or magnetoelastic effect occurs or is conceivable.
  • the use offers where special demands on the sensor position with respect to the shaft 16 to be measured are provided.
  • Particularly preferred is the use of bicycles or pedelecs.
  • sliding materials basically all available materials can be used which have a lower coefficient of friction compared to the torsion element 18 and / or have a lower modulus of elasticity.
  • Typical coefficients of friction of useful polymers are in the range of 0.04 and 0.25.
  • Conceivable is the use of low-friction thermoplastics, eg of PTFE, Teflon, etc., especially as a sliding layer in sheet form or the like, of plastics with additives, of bronze, brass, etc.

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

Abstract

L'invention concerne un dispositif de mesure (100) pour mesurer le couple de rotation (M) sur un arbre (16) et en particulier le moment de torsion de l'arbre (16), ledit dispositif de mesure comprenant un système de capteur (30) conçu pour mesurer le champ magnétique porté ou généré par un arbre, un support de capteur (20) qui maintient l'ensemble capteur (30) et permet de le positionner face à une zone (17a) d'une surface périphérique externe (17) de l'arbre (16), et au moins une douille de guidage (41) conçue maintenir le support de capteur (20), pour entourer la surface périphérique externe (17) de l'arbre (16) au niveau de ladite zone (17a) de la surface périphérique externe (17) de l'arbre (16) et, pour fixer le support de capteur (20) dans sa position vis-à-vis de ladite zone (17a) de la surface périphérique externe (17) de l'arbre (16).
PCT/EP2016/061738 2015-07-17 2016-05-25 Dispositif de mesure pour mesurer le couple de rotation sur un arbre, mécanisme bielle-manivelle et véhicule WO2017012751A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015213466.0 2015-07-17
DE102015213466.0A DE102015213466A1 (de) 2015-07-17 2015-07-17 Messanordnung zur Messung des Drehmomentes an einer Welle, Kurbeltrieb und Fahrzeug

Publications (1)

Publication Number Publication Date
WO2017012751A1 true WO2017012751A1 (fr) 2017-01-26

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Application Number Title Priority Date Filing Date
PCT/EP2016/061738 WO2017012751A1 (fr) 2015-07-17 2016-05-25 Dispositif de mesure pour mesurer le couple de rotation sur un arbre, mécanisme bielle-manivelle et véhicule

Country Status (2)

Country Link
DE (1) DE102015213466A1 (fr)
WO (1) WO2017012751A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107421665A (zh) * 2017-06-29 2017-12-01 太仓市荣驰电机有限公司 一种压力测量装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6941585B2 (ja) * 2018-03-30 2021-09-29 株式会社シマノ 人力駆動車用コンポーネント

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009008074A1 (de) * 2009-02-10 2010-08-12 Siemens Aktiengesellschaft Messanordnung und Verwendung zum Erfassen des Drehmomentes
DE102012214332A1 (de) * 2012-08-10 2014-02-13 Nctengineering Gmbh Leistungssensorik für Fahrräder

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009008074A1 (de) * 2009-02-10 2010-08-12 Siemens Aktiengesellschaft Messanordnung und Verwendung zum Erfassen des Drehmomentes
DE102012214332A1 (de) * 2012-08-10 2014-02-13 Nctengineering Gmbh Leistungssensorik für Fahrräder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107421665A (zh) * 2017-06-29 2017-12-01 太仓市荣驰电机有限公司 一种压力测量装置

Also Published As

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DE102015213466A1 (de) 2017-01-19

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