WO2016189213A1 - Device for measuring the speed of a rotary shaft, for example of an input shaft of a vehicle gearbox - Google Patents

Device for measuring the speed of a rotary shaft, for example of an input shaft of a vehicle gearbox Download PDF

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Publication number
WO2016189213A1
WO2016189213A1 PCT/FR2016/051013 FR2016051013W WO2016189213A1 WO 2016189213 A1 WO2016189213 A1 WO 2016189213A1 FR 2016051013 W FR2016051013 W FR 2016051013W WO 2016189213 A1 WO2016189213 A1 WO 2016189213A1
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WO
WIPO (PCT)
Prior art keywords
sensor
speed
measuring
rotary shaft
target
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PCT/FR2016/051013
Other languages
French (fr)
Inventor
Jean Pierre LENAIN
Walter Bertolino
Original Assignee
Peugeot Citroen Automobiles Sa
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Application filed by Peugeot Citroen Automobiles Sa filed Critical Peugeot Citroen Automobiles Sa
Publication of WO2016189213A1 publication Critical patent/WO2016189213A1/en

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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
    • F16H—GEARING
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/36—Inputs being a function of speed
    • F16H59/38—Inputs being a function of speed of gearing elements
    • F16H59/42—Input shaft speed
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • 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
    • F16D2300/00—Special features for couplings or clutches
    • F16D2300/18—Sensors; Details or arrangements thereof
    • 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
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
    • F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric

Definitions

  • the invention relates to a device for measuring the speed of a rotary shaft, in particular but not exclusively a gearbox primary shaft of a vehicle. It also relates to a vehicle, in particular a motor vehicle, whose gearbox includes such a device for measuring the speed of the primary shaft of its gearbox.
  • Known devices for measuring the speed of a rotary shaft use, most often, at least one speed sensor, whose sensitive part, called “active part” in the following text is coaxial with the so-called part “Connectivity”, which connects the speed sensor to parts, organs or computers, which receive and process the information given by the sensor.
  • These speed sensors read a mechanical part integral in rotation with the rotary shaft whose rotational speed is measured, or integral in rotation with a component in constant engagement (in rotation) with this rotary shaft. This mechanical part is called “target” of the rotating shaft whose rate is measured.
  • These speed sensors are, most often, magnetic sensors, whose active part, which consists in particular of a coil of wire, a pole piece and a magnet, measures the magnetic flux variations. generated by the target to provide an electrical signal of varying amplitude and frequency to determine the rotational speed of the rotary shaft.
  • the document EP 1 150 041 B1 discloses a gearshift device, which comprises a mechanical gearbox, a gearshift control, a transmission control for controlling the change control. speed, and several magnetic sensors including a sensor gearbox shaft speed, which is positioned on the crankcase edge of this gearbox.
  • the document EP 0 943 844 B1 describes a method for controlling the engagement of a selected speed in the case of a gearbox, in which measurements of the speed of the The primary shaft of the gearbox is made by speed sensors located at the entrance and exit of the box.
  • the object of the present invention is to overcome this difficulty and to provide, for this purpose, a device for measuring the speed of a rotary shaft, whose geometric structure allows to overcome the proximity constraints mentioned above. above.
  • Another object of the present invention is to provide such a measuring device, which can be mounted without difficulty in a constraining environment, which can be easily accessible, in particular for reasons of maintenance or replacement of the device.
  • the present invention relates to a device for measuring the speed of a rotary shaft, consisting of a speed measuring sensor, which has an active portion close to a solidary target in rotation of the rotary shaft, a centering portion for centering the sensor for attachment to a fixed part facing the target and a connection part.
  • the active part of the sensor is not coaxial with the centering part, but is off-axis with respect to the latter, so as to overcome the constraints of the environment of the target, particularly the presence of mechanical organs located in the vicinity of the latter.
  • the active part of the sensor is connected to the centering portion of the sensor by an intermediate portion and this active portion is off-axis with respect to said intermediate portion, the latter being itself even offset from the centering portion of the sensor.
  • the centering portion of the sensor may advantageously be of cylindrical shape and be intended to be inserted into a corresponding cylindrical bore of the fixed part opposite the target.
  • the axial length of the centering portion of the sensor is of the order or close to 1, 5 times the diameter of this centering portion.
  • the speed measuring sensor may be a magnetic sensor of Hall effect type.
  • the rotary shaft whose speed is measured is the primary shaft of a gearbox.
  • a motor vehicle and the fixed part, on which is centered for fixing the speed measuring sensor, is the housing of the vehicle gearbox.
  • the target is the toothing of a pinion integral in rotation with the gearbox primary shaft.
  • the present invention also relates to a vehicle, in particular a motor vehicle, which comprises a device for measuring the speed of the primary shaft of its gearbox, and the measuring device is in accordance with that described hereinabove. in broad outline.
  • Figure 1 is a schematic sectional view illustrating the principle of the device for measuring the speed of a primary shaft of a gearbox of a motor vehicle, according to the present invention
  • Figure 2 is a schematic sectional view illustrating one of the problems posed in the implementation of a device for measuring the speed of a gearbox primary shaft
  • FIG. 3 is a diagrammatic sectional view illustrating an exemplary embodiment of the speed measuring device according to the present invention, which makes it possible to solve the problem illustrated in FIG. 2; and
  • FIG. 4 is a diagrammatic sectional view illustrating an alternative embodiment of the measuring device according to the present invention, in which the measurement sensor detects, not radial but axial, the target pinion of the invention.
  • rotary shaft whose measurement is measured.
  • a rotary shaft A which, in the present embodiment, is the primary shaft of the gearbox of a motor vehicle .
  • This rotating shaft A is connected, in a conventional manner, to the crankshaft via the clutch and thus rotates at the same speed as the engine of the vehicle.
  • the reference 20 designates the casing of the vehicle gearbox, partially shown around a pinion, general reference 1, integral with the rotary shaft A.
  • a device for measuring the speed of the rotary shaft A measures the speed of rotation of the pinion 1, integral in rotation with the rotary shaft A, using as a target gear teeth 1.
  • the toothing of the pinion 1 is the target of the speed measurement of the rotary shaft A.
  • this measured speed may be the gearbox input speed, which is addressed, in the form of a sinusoidal signal of variable frequency and amplitude, to the manual transmission computer. controlled to manage different actions, such as the determination of the clutch slip, the control of the clutch stop, the control of the end of synchronization of a gear ratio, etc.
  • This measuring device is constituted by a speed measurement sensor, general reference 10.
  • the sensor 10 is an active sensor, of magneto resistive type or Hall effect composed of several parts, which are as follows:
  • this active portion 12 including, in a conventional manner, a magnet, a polar rod, a coil and a gap, [0030] a centering portion 14, which allows the centering of the sensor 10 for attachment to the housing 20 facing the target formed by the toothing of the pinion 1, and - A connection part 16, which projects externally from the housing 20, and which allows the sending and processing of the electrical information given by the active portion 12 of the sensor 10 to the gearbox computer, for example.
  • the measurement signals recorded by the active portion 12 of the sensor are transmitted to the connector portion 16 by electrical conductors (not shown).
  • the sensor 10 which is centered by its centering portion 14 on the casing 20, is then fixed on the casing by at least one fixing screw intended to be screwed into a threaded bore 23 of the casing 20.
  • the centering portion 14 is of cylindrical shape and is intended to be inserted into a cylindrical bore 21 corresponding to the fixed part 20.
  • the axial length "I" of this centering portion 14 is of the order or close to 1, 5 times the diameter "D" of the latter.
  • the active portion 12 of the sensor is off-axis with respect to the centering portion 14 of the sensor, that is to say that the active portion 12 is not coaxial with the part centering 14.
  • a first element is said to be “offset” with respect to a second element, if the axis of this first element is no longer merged with the axis of the second element, d other terms if the two axes, of the first and second elements, are offset relative to each other, that is to say distant from each other.
  • the active portion 12 of the sensor 10 was coaxial with the centering portion 14 of the sensor 10, the mounting of the latter would not be possible, because this active portion 12 of the sensor 10 would then abut against the pinion 2 immediately above the target pinion 1.
  • the misalignment according to the principle of the invention makes it possible to mount and read the target toothing 1, while this would be impossible with a sensor of conventional structure and shape, "uni axial".
  • the active portion 12 'of the speed sensor 10' which is opposite the target pinion 1 integral in rotation with the rotary shaft A, is coaxial with its connector portion 16 '.
  • a clearance is provided in the housing 20 to accommodate this portion of the connector 16 ', but this housing weakens the structure of the casing 20 of the gearbox leaving a casing thickness "e" very low ( Figure 2).
  • a speed sensor according to the present invention, of the type described above with reference to the drawing of Figure 1.
  • a sensor 10 has a connection part 16, which is off-axis with respect to its active part 12. Thanks to the offset according to the invention, in this arrangement of FIG. 3, the casing 20 of the gearbox can retain, at the vicinity of the speed sensor 10, a thickness "E" ( Figure 3) sufficient not to change the strength of the housing 20, the mechanical strength and sealing of the gearbox. .
  • the active portion 12 is connected to the centering portion 14 of the sensor by an intermediate portion 13, the active part 12 being off-center with respect to the intermediate portion 13 (first offset), itself offset from the centering portion 14 (second misalignment).
  • the active portion 12 of the sensor 10 allows, by its shape and its position, a radial detection of the teeth of the pinion 1, that is to say in the direction of the spokes sprocket.
  • the sensor of FIG. 4 is composed of an active portion 12, close to the pinion 1, of a centering portion 14, which allows the centering of the sensor and its fixing on the housing 20 , a connector portion 16, which projects externally from the housing 20, and an intermediate portion 13, which is located between the active portion 12 and the centering portion 14 of the sensor.
  • the fixed part 20, on which is centered for its attachment the sensor 10 may be, according to alternative embodiments of the invention, a different part of the gearbox housing , such as a clutch housing or other type of housing, or even a cover fixed on a housing.
  • the device for measuring the speed of a rotary shaft as described above and applied, by way of example, to the measurement of the speed of the primary shaft of the gearbox of a vehicle, has many advantages, including the following advantages:

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Of Transmission Device (AREA)

Abstract

The invention relates to a device for measuring the speed of a rotary shaft (A). Said device consists of a speed-measuring sensor (10) which has an active portion (12) near a target (1) which is fixed to the rotary shaft (A) for conjoint rotation therewith, a centring portion (14) making it possible to centre the sensor (10) with a view to attaching it to a stationary portion (20) opposite the target (1), and a connector portion (16). The active portion (12) of the sensor (10) is offset relative to an intermediate portion (13) of said sensor, which in turn is off-centre relative to said centring portion (14), so as to overcome the constraints of the environment of the target (1), in particular the presence of mechanical members located near said target.

Description

DISPOSITIF DE MESURE DU REGIME D'UN ARBRE ROTATIF, PAR EXEMPLE D'UN ARBRE PRIMAIRE DE BOÎTE DE  DEVICE FOR MEASURING THE SCHEME OF A ROTARY SHAFT, FOR EXAMPLE OF A PRIMARY SHAFT OF A BOX OF
VITESSES DE VEHICULE.  VEHICLE SPEED.
[0001 ] L'invention porte sur un dispositif de mesure du régime d'un arbre rotatif, en particulier mais non exclusivement d'un arbre primaire de boîte de vitesses d'un véhicule. Elle concerne aussi un véhicule, en particulier un véhicule automobile, dont la boîte de vitesses comporte un tel dispositif de mesure du régime de l'arbre primaire de sa boîte de vitesses. [0002] Les dispositifs connus de mesure du régime d'un arbre rotatif utilisent, le plus souvent, au moins un capteur de vitesse, dont la partie sensible, dite « partie active » dans la suite du texte, est coaxiale à la partie dite « de connectique », qui relie le capteur de vitesse aux pièces, organes ou calculateurs, qui reçoivent et traitent les informations données par le capteur. [0003] Ces capteurs de vitesse lisent une pièce mécanique solidaire en rotation avec l'arbre rotatif dont on mesure la vitesse de rotation, ou bien solidaire en rotation d'un composant en prise constante (en rotation) avec cet arbre rotatif. Cette pièce mécanique est appelée « cible » de l'arbre rotatif dont on mesure le régime. The invention relates to a device for measuring the speed of a rotary shaft, in particular but not exclusively a gearbox primary shaft of a vehicle. It also relates to a vehicle, in particular a motor vehicle, whose gearbox includes such a device for measuring the speed of the primary shaft of its gearbox. Known devices for measuring the speed of a rotary shaft use, most often, at least one speed sensor, whose sensitive part, called "active part" in the following text is coaxial with the so-called part "Connectivity", which connects the speed sensor to parts, organs or computers, which receive and process the information given by the sensor. These speed sensors read a mechanical part integral in rotation with the rotary shaft whose rotational speed is measured, or integral in rotation with a component in constant engagement (in rotation) with this rotary shaft. This mechanical part is called "target" of the rotating shaft whose rate is measured.
[0004] Ces capteurs de vitesse sont, le plus souvent, des capteurs magnétiques, dont la partie active, qui est constituée notamment d'une bobine de fil, d'une pièce polaire et d'un aimant, mesure les variations de flux magnétique générées par la cible afin de délivrer un signal électrique, d'amplitude et de fréquence variables, pour déterminer la vitesse de rotation de l'arbre rotatif. These speed sensors are, most often, magnetic sensors, whose active part, which consists in particular of a coil of wire, a pole piece and a magnet, measures the magnetic flux variations. generated by the target to provide an electrical signal of varying amplitude and frequency to determine the rotational speed of the rotary shaft.
[0005] On connaît des exemples d'application de ces capteurs de vitesse à la mesure de la vitesse de rotation d'un arbre de boîte de vitesses de véhicule automobile. Examples of application of these speed sensors to the measurement of the rotational speed of a motor vehicle gearbox shaft are known.
[0006] A titre d'exemple, le document EP 1 150 041 B1 décrit un dispositif de changement de vitesse, qui comprend une boîte de vitesses mécanique, une commande de changement de vitesse, une commande de transmission servant à piloter la commande de changement de vitesse, et plusieurs capteurs magnétiques parmi lesquels un capteur de régime d'arbre de la boîte de vitesses, qui est positionné sur le bord du carter de cette boîte de vitesses. By way of example, the document EP 1 150 041 B1 discloses a gearshift device, which comprises a mechanical gearbox, a gearshift control, a transmission control for controlling the change control. speed, and several magnetic sensors including a sensor gearbox shaft speed, which is positioned on the crankcase edge of this gearbox.
[0007] A titre d'exemple également, le document EP 0 943 844 B1 décrit un procédé de commande de l'enclenchement d'une vitesse sélectionnée dans le cas d'une boîte de vitesses, dans lequel des mesures de la vitesse de l'arbre primaire de la boîte de vitesses sont réalisées par des capteurs de vitesse situés à l'entrée et à la sortie de la boîte. By way of example also, the document EP 0 943 844 B1 describes a method for controlling the engagement of a selected speed in the case of a gearbox, in which measurements of the speed of the The primary shaft of the gearbox is made by speed sensors located at the entrance and exit of the box.
[0008] Il arrive que l'implantation de tels capteurs de vitesse soit rendue difficile, voire impossible, du fait de la présence de pièces ou organes mécaniques dans la proximité immédiate de l'arbre rotatif dont on mesure le régime ou bien dans la proximité de la cible permettant de mesurer ce régime. It sometimes happens that the implantation of such speed sensors is made difficult, if not impossible, because of the presence of mechanical parts or members in the immediate vicinity of the rotary shaft whose speed is measured or in the vicinity. the target to measure this regime.
[0009] Le but de la présente invention est de surmonter cette difficulté et de fournir, à cette fin, un dispositif de mesure du régime d'un arbre rotatif, dont la structure géométrique permette de s'affranchir des contraintes de proximité évoquées ci-dessus. The object of the present invention is to overcome this difficulty and to provide, for this purpose, a device for measuring the speed of a rotary shaft, whose geometric structure allows to overcome the proximity constraints mentioned above. above.
[0010] Un autre but de la présente invention est de fournir un tel dispositif de mesure, qui puisse être monté sans difficultés dans un environnement contraignant, qui puisse être aisément accessible, notamment pour des raisons de maintenance ou de remplacement du dispositif. Another object of the present invention is to provide such a measuring device, which can be mounted without difficulty in a constraining environment, which can be easily accessible, in particular for reasons of maintenance or replacement of the device.
[001 1 ] Pour parvenir à ces buts, la présente invention a pour objet un dispositif de mesure de régime d'un arbre rotatif, constitué d'un capteur de mesure de vitesse, qui présente une partie active proche d'une cible solidaire en rotation de l'arbre rotatif, une partie de centrage permettant le centrage du capteur en vue de sa fixation sur une pièce fixe en regard de la cible et une partie de connectique. Dans ce dispositif de mesure, nouveau, la partie active du capteur n'est pas coaxiale à la partie de centrage, mais désaxée par rapport à cette dernière, de façon à s'affranchir des contraintes de l'environnement de la cible, notamment de la présence d'organes mécaniques situés dans la proximité de cette dernière. [001 1] To achieve these objects, the present invention relates to a device for measuring the speed of a rotary shaft, consisting of a speed measuring sensor, which has an active portion close to a solidary target in rotation of the rotary shaft, a centering portion for centering the sensor for attachment to a fixed part facing the target and a connection part. In this new measuring device, the active part of the sensor is not coaxial with the centering part, but is off-axis with respect to the latter, so as to overcome the constraints of the environment of the target, particularly the presence of mechanical organs located in the vicinity of the latter.
[0012] Selon un mode préféré de réalisation de l'invention, la partie active du capteur est reliée à la partie de centrage du capteur par une partie intermédiaire et cette partie active est désaxée par rapport à ladite partie intermédiaire, cette dernière étant elle-même désaxée par rapport à la partie de centrage du capteur. [0013] La partie de centrage du capteur peut avantageusement être de forme cylindrique et être destinée à être insérée dans un alésage cylindrique correspondant de la pièce fixe en regard de la cible. According to a preferred embodiment of the invention, the active part of the sensor is connected to the centering portion of the sensor by an intermediate portion and this active portion is off-axis with respect to said intermediate portion, the latter being itself even offset from the centering portion of the sensor. The centering portion of the sensor may advantageously be of cylindrical shape and be intended to be inserted into a corresponding cylindrical bore of the fixed part opposite the target.
[0014] De préférence, la longueur axiale de la partie de centrage du capteur est de l'ordre ou voisine de 1 ,5 fois le diamètre de cette partie de centrage. Preferably, the axial length of the centering portion of the sensor is of the order or close to 1, 5 times the diameter of this centering portion.
[0015] Avantageusement, le capteur de mesure de vitesse peut être un capteur magnétique, de type à effet Hall. Advantageously, the speed measuring sensor may be a magnetic sensor of Hall effect type.
[0016] Selon un exemple particulier de réalisation de la présente invention, non limitatif de l'objet et de la portée de cette dernière, l'arbre rotatif dont on mesure le régime est l'arbre primaire d'une boîte de vitesses d'un véhicule automobile, et la pièce fixe, sur laquelle est centré en vue de sa fixation le capteur de mesure de vitesse, est le carter de la boîte de vitesses du véhicule. According to a particular embodiment of the present invention, not limiting the object and scope of the latter, the rotary shaft whose speed is measured is the primary shaft of a gearbox. a motor vehicle, and the fixed part, on which is centered for fixing the speed measuring sensor, is the housing of the vehicle gearbox.
[0017] De préférence, dans cet exemple de réalisation, la cible est la denture d'un pignon solidaire en rotation de l'arbre primaire de boîte de vitesses. [0018] La présente invention a aussi pour objet un véhicule, en particulier un véhicule automobile, qui comporte un dispositif de mesure du régime de l'arbre primaire de sa boîte de vitesses, et ce dispositif de mesure est conforme à celui décrit ci-dessus dans ses grandes lignes. Preferably, in this embodiment, the target is the toothing of a pinion integral in rotation with the gearbox primary shaft. The present invention also relates to a vehicle, in particular a motor vehicle, which comprises a device for measuring the speed of the primary shaft of its gearbox, and the measuring device is in accordance with that described hereinabove. in broad outline.
[0019] D'autres buts, avantages et caractéristiques de l'invention apparaîtront dans la description qui suit d'un exemple de réalisation, non limitatif de l'objet et de la portée de la présente demande de brevet, accompagnée de dessins dans lesquels : Other objects, advantages and features of the invention will appear in the following description of an exemplary embodiment, not limiting the object and scope of the present patent application, accompanied by drawings in which :
[0020] - la figure 1 est une vue en coupe, schématique, illustrant le principe du dispositif de mesure du régime d'un arbre primaire de boîte de vitesses d'un véhicule automobile, selon la présente invention, [0021 ] - la figure 2 est une vue en coupe, schématique, illustrant l'un des problèmes posés dans l'implantation d'un dispositif de mesure de régime d'un arbre primaire de boîte de vitesses, [0020] - Figure 1 is a schematic sectional view illustrating the principle of the device for measuring the speed of a primary shaft of a gearbox of a motor vehicle, according to the present invention, [0021] - the figure 2 is a schematic sectional view illustrating one of the problems posed in the implementation of a device for measuring the speed of a gearbox primary shaft,
[0022] - la figure 3 est une vue en coupe, schématique, illustrant, un exemple de réalisation du dispositif de mesure de régime selon la présente invention, qui permet de résoudre le problème illustré sur la figure 2, et [0023] - la figure 4 est une vue en coupe, schématique, illustrant une variante de réalisation du dispositif de mesure selon la présente invention, dans laquelle le capteur de mesure réalise une détection, non plus radiale mais axiale, du pignon cible de l'arbre rotatif dont on mesure le régime. [0024] En référence au dessin de la figure 1 , on a représenté, de manière très schématique, un arbre rotatif A, qui, dans le présent exemple de réalisation, est l'arbre primaire de la boîte de vitesses d'un véhicule automobile. Cet arbre rotatif A est relié, de manière classique, au vilebrequin par l'intermédiaire de l'embrayage et tourne, ainsi, à la même vitesse que le moteur du véhicule. [0025] La référence 20 désigne le carter de la boîte de vitesses du véhicule, représentée partiellement autour d'un pignon, de référence générale 1 , monobloc avec l'arbre rotatif A. FIG. 3 is a diagrammatic sectional view illustrating an exemplary embodiment of the speed measuring device according to the present invention, which makes it possible to solve the problem illustrated in FIG. 2; and FIG. 4 is a diagrammatic sectional view illustrating an alternative embodiment of the measuring device according to the present invention, in which the measurement sensor detects, not radial but axial, the target pinion of the invention. rotary shaft whose measurement is measured. With reference to the drawing of Figure 1, there is shown very schematically a rotary shaft A, which, in the present embodiment, is the primary shaft of the gearbox of a motor vehicle . This rotating shaft A is connected, in a conventional manner, to the crankshaft via the clutch and thus rotates at the same speed as the engine of the vehicle. The reference 20 designates the casing of the vehicle gearbox, partially shown around a pinion, general reference 1, integral with the rotary shaft A.
[0026] Conformément à l'objet de la présente invention, il est prévu un dispositif de mesure du régime de l'arbre rotatif A. Ce dispositif mesure la vitesse de rotation du pignon 1 , solidaire en rotation de l'arbre rotatif A, en utilisant comme cible la denture du pignon 1 . En d'autres termes, la denture du pignon 1 constitue la cible de la mesure de régime de l'arbre rotatif A. According to the object of the present invention, there is provided a device for measuring the speed of the rotary shaft A. This device measures the speed of rotation of the pinion 1, integral in rotation with the rotary shaft A, using as a target gear teeth 1. In other words, the toothing of the pinion 1 is the target of the speed measurement of the rotary shaft A.
[0027] A titre d'exemple, cette vitesse mesurée peut être la vitesse d'entrée de boîte de vitesses, qui est adressée, sous forme d'un signal de type sinusoïdal à fréquence et amplitude variables, au calculateur de boîte de vitesses manuelle pilotée afin de gérer différentes actions, telles que la détermination du glissement de l'embrayage, le pilotage de la butée d'embrayage, le contrôle de la fin de synchronisation d'un rapport de vitesse, etc. By way of example, this measured speed may be the gearbox input speed, which is addressed, in the form of a sinusoidal signal of variable frequency and amplitude, to the manual transmission computer. controlled to manage different actions, such as the determination of the clutch slip, the control of the clutch stop, the control of the end of synchronization of a gear ratio, etc.
[0028] Ce dispositif de mesure est constitué par un capteur de mesure de vitesse, de référence générale 10. Le capteur 10 est un capteur actif, de type magnéto résistif ou à effet Hall composé de plusieurs parties, qui sont les suivantes : This measuring device is constituted by a speed measurement sensor, general reference 10. The sensor 10 is an active sensor, of magneto resistive type or Hall effect composed of several parts, which are as follows:
[0029] - une partie active 12, proche du pignon 1 , sensiblement en face de ce dernier, c'est-à-dire de la cible, cette partie active 12 comportant notamment, de façon classique, un aimant, une tige polaire, une bobine et un entrefer, [0030] - une partie de centrage 14, qui permet le centrage du capteur 10 en vue de sa fixation sur le carter 20 en regard de la cible formée par la denture du pignon 1 , et [0031 ] - une partie de connectique 16, qui fait saillie externe du carter 20, et qui permet l'envoi et le traitement des informations électriques données par la partie active 12 du capteur 10 vers le calculateur de boîte de vitesses, par exemple. - an active part 12, close to the pinion 1, substantially opposite the latter, that is to say, the target, this active portion 12 including, in a conventional manner, a magnet, a polar rod, a coil and a gap, [0030] a centering portion 14, which allows the centering of the sensor 10 for attachment to the housing 20 facing the target formed by the toothing of the pinion 1, and - A connection part 16, which projects externally from the housing 20, and which allows the sending and processing of the electrical information given by the active portion 12 of the sensor 10 to the gearbox computer, for example.
[0032] Les signaux de mesure enregistrés par la partie active 12 du capteur sont transmis à la partie de connectique 16 par des conducteurs électriques (non représentés). The measurement signals recorded by the active portion 12 of the sensor are transmitted to the connector portion 16 by electrical conductors (not shown).
[0033] Le capteur 10, qui est centré par sa partie de centrage 14 sur le carter 20, est ensuite fixé sur le carter par au moins une vis de fixation destinée à être vissée dans un alésage fileté 23 du carter 20. The sensor 10, which is centered by its centering portion 14 on the casing 20, is then fixed on the casing by at least one fixing screw intended to be screwed into a threaded bore 23 of the casing 20.
[0034] La partie de centrage 14 est de forme cylindrique et est destinée à être insérée dans un alésage cylindrique 21 correspondant de la pièce fixe 20. De plus, la longueur axiale « I » de cette partie de centrage 14 est de l'ordre ou voisine de 1 ,5 fois le diamètre « D » de cette dernière. The centering portion 14 is of cylindrical shape and is intended to be inserted into a cylindrical bore 21 corresponding to the fixed part 20. In addition, the axial length "I" of this centering portion 14 is of the order or close to 1, 5 times the diameter "D" of the latter.
[0035] Conformément au principe de la présente invention, la partie active 12 du capteur est désaxée par rapport à la partie de centrage 14 du capteur, c'est-à-dire que la partie active 12 n'est pas coaxiale avec la partie de centrage 14. According to the principle of the present invention, the active portion 12 of the sensor is off-axis with respect to the centering portion 14 of the sensor, that is to say that the active portion 12 is not coaxial with the part centering 14.
[0036] De façon générale, dans le présent texte, un premier élément est dit « désaxé » par rapport à un second élément, si l'axe de ce premier élément n'est plus confondu avec l'axe du second élément, en d'autres termes si les deux axes, du premier et du second éléments, sont décalés l'un par rapport à l'autre, c'est-à-dire distants l'un de l'autre. [0037] Comme illustré sur le dessin de la figure 1 , si la partie active 12 du capteur 10 était coaxiale avec la partie de centrage 14 du capteur 10, le montage de ce dernier ne serait pas possible, parce que cette partie active 12 du capteur 10 viendrait alors en butée contre le pignon 2 immédiatement au-dessus du pignon cible 1 . Ainsi, le désaxage selon le principe de l'invention permet de rendre possible le montage et la lecture de la denture cible 1 , alors que cela serait impossible avec un capteur de structure et de forme conventionnelles, « uni axiale ». In a general manner, in the present text, a first element is said to be "offset" with respect to a second element, if the axis of this first element is no longer merged with the axis of the second element, d other terms if the two axes, of the first and second elements, are offset relative to each other, that is to say distant from each other. As shown in the drawing of Figure 1, if the active portion 12 of the sensor 10 was coaxial with the centering portion 14 of the sensor 10, the mounting of the latter would not be possible, because this active portion 12 of the sensor 10 would then abut against the pinion 2 immediately above the target pinion 1. Thus, the misalignment according to the principle of the invention makes it possible to mount and read the target toothing 1, while this would be impossible with a sensor of conventional structure and shape, "uni axial".
[0038] Un autre avantage du désaxage des parties constitutives du capteur 10 est illustré par les dessins des figures 2 et 3. Another advantage of offsetting the constituent parts of the sensor 10 is illustrated by the drawings of Figures 2 and 3.
[0039] En référence au dessin de la figure 2, on a illustré, de manière schématique, le problème posé dans l'implantation d'un moyen de mesure du régime d'un arbre primaire de boîte de vitesses de véhicule, désigné également arbre rotatif A dans la suite du présent texte. Referring to the drawing of Figure 2, there is illustrated, schematically, the problem in the implementation of a means for measuring the speed of a primary shaft vehicle gearbox, also referred to as rotary shaft A in the remainder of this text.
[0040] La partie active 12' du capteur de vitesse 10', qui est face au pignon cible 1 solidaire en rotation de l'arbre rotatif A, est coaxiale à sa partie de connectique 16'. Un dégagement est prévu dans le carter 20 pour loger cette partie de connectique 16', mais ce logement fragilise la structure du carter 20 de la boîte de vitesses en laissant une épaisseur de carter « e » très faible (figure 2). The active portion 12 'of the speed sensor 10', which is opposite the target pinion 1 integral in rotation with the rotary shaft A, is coaxial with its connector portion 16 '. A clearance is provided in the housing 20 to accommodate this portion of the connector 16 ', but this housing weakens the structure of the casing 20 of the gearbox leaving a casing thickness "e" very low (Figure 2).
[0041 ] Pour surmonter cette difficulté, comme représenté schématiquement sur le dessin de la figure 3, on a recours à un capteur de vitesse selon la présente invention, du type décrit précédemment en référence au dessin de la figure 1 . Un tel capteur 10 présente une partie de connectique 16, qui est désaxée par rapport à sa partie active 12. Grâce au désaxage selon l'invention, dans cet arrangement de la figure 3, le carter 20 de la boîte de vitesses peut conserver, au voisinage du capteur de vitesse 10, une épaisseur « E » (figure 3) suffisante pour ne pas modifier la solidité du carter 20, la tenue mécanique et l'étanchéité de la boîte de vitesses. . To overcome this difficulty, as shown schematically in the drawing of Figure 3, is used a speed sensor according to the present invention, of the type described above with reference to the drawing of Figure 1. Such a sensor 10 has a connection part 16, which is off-axis with respect to its active part 12. Thanks to the offset according to the invention, in this arrangement of FIG. 3, the casing 20 of the gearbox can retain, at the vicinity of the speed sensor 10, a thickness "E" (Figure 3) sufficient not to change the strength of the housing 20, the mechanical strength and sealing of the gearbox. .
[0042] Dans l'exemple représenté schématiquement sur le dessin de la figure 3, il y a deux désaxages des parties constitutives du capteur 10. La partie active 12 est reliée à la partie de centrage 14 du capteur par une partie intermédiaire 13, la partie active 12 étant désaxée par rapport à la partie intermédiaire 13 (premier désaxage), elle-même désaxée par rapport à la partie de centrage 14 (second désaxage). In the example shown schematically in the drawing of Figure 3, there are two offsets of the component parts of the sensor 10. The active portion 12 is connected to the centering portion 14 of the sensor by an intermediate portion 13, the active part 12 being off-center with respect to the intermediate portion 13 (first offset), itself offset from the centering portion 14 (second misalignment).
[0043] Dans les figures 1 , 2 et 3, la partie active 12 du capteur 10 permet, par sa forme et sa position, une détection radiale de la denture du pignon 1 , c'est-à-dire selon la direction des rayons du pignon. In Figures 1, 2 and 3, the active portion 12 of the sensor 10 allows, by its shape and its position, a radial detection of the teeth of the pinion 1, that is to say in the direction of the spokes sprocket.
[0044] En référence au dessin de la figure 4, on a représenté une variante de réalisation de l'invention, dans laquelle la forme et la position de la partie active 12 du capteur permet une détection axiale de la denture du pignon 1 , cible de la mesure de régime de l'arbre rotatif A. Cette détection axiale se fait selon la direction longitudinale de l'axe de rotation du pignon. Referring to the drawing of Figure 4, there is shown an alternative embodiment of the invention, wherein the shape and position of the active portion 12 of the sensor allows axial detection of the teeth of pinion 1, target the speed measurement of the rotary shaft A. This axial detection is in the longitudinal direction of the axis of rotation of the pinion.
[0045] On notera que les pièces et parties de pièce de la figure 4, qui sont identiques ou similaires aux pièces et parties de pièce de la figure 1 , sont désignées par les mêmes références numériques. Ainsi, comme dans le mode de réalisation de l'invention décrit précédemment en référence aux figures 1 à 3, le capteur de la figure 4 est composé d'une partie active 12, proche du pignon 1 , d'une partie de centrage 14, qui permet le centrage du capteur et sa fixation sur le carter 20, d'une partie de connectique 16, qui fait saillie externe du carter 20, et d'une partie intermédiaire 13, qui est située entre la partie active 12 et la partie de centrage 14 du capteur. Note that the parts and parts of the part of Figure 4, which are identical or similar to the parts and parts of Figure 1 part, are designated by the same reference numerals. Thus, as in the embodiment of the invention described previously with reference to FIGS. 1 to 3, the sensor of FIG. 4 is composed of an active portion 12, close to the pinion 1, of a centering portion 14, which allows the centering of the sensor and its fixing on the housing 20 , a connector portion 16, which projects externally from the housing 20, and an intermediate portion 13, which is located between the active portion 12 and the centering portion 14 of the sensor.
[0046] Il importe de noter également que la pièce fixe 20, sur laquelle est centré en vue de sa fixation le capteur 10, peut être, selon des variantes de réalisation de l'invention, une pièce différente du carter de la boîte de vitesses, comme par exemple un carter d'embrayage ou un autre type de carter, voire même un couvercle fixé sur un carter. [0047] Le dispositif de mesure du régime d'un arbre rotatif, tel que décrit ci-dessus et appliqué, à titre d'exemple, à la mesure du régime de l'arbre primaire de la boîte de vitesses d'un véhicule, présente de nombreux avantages, parmi lesquels les avantages suivants : It is important to note also that the fixed part 20, on which is centered for its attachment the sensor 10, may be, according to alternative embodiments of the invention, a different part of the gearbox housing , such as a clutch housing or other type of housing, or even a cover fixed on a housing. The device for measuring the speed of a rotary shaft, as described above and applied, by way of example, to the measurement of the speed of the primary shaft of the gearbox of a vehicle, has many advantages, including the following advantages:
[0048] - il permet de s'affranchir des contraintes de proximité évoquées ci-dessus, en assurant un décalage suffisant pour ne pas parasiter la lecture magnétique du capteur de vitesse par une masse métallique proche de la cible, It makes it possible to overcome the proximity constraints mentioned above, by ensuring a sufficient offset to avoid interfering with the magnetic reading of the speed sensor by a metal mass close to the target,
[0049] - il permet, du fait également de ce décalage, de conserver, au voisinage du capteur, une épaisseur suffisante de matière dans le carter de la boîte de vitesses pour la solidité de ce dernier et l'étanchéité de la boîte de vitesses, [0050] - il permet la mesure de régime quel que soit le rapport de vitesse engagé, - It allows, also because of this shift, to maintain, in the vicinity of the sensor, a sufficient thickness of material in the housing of the gearbox for the strength of the latter and the sealing of the gearbox , [0050] it allows the measurement of speed whatever the gear ratio engaged,
[0051 ] - il est sans impact sur la longueur de la boîte de vitesses, et [0051] it has no impact on the length of the gearbox, and
[0052] - il permet d'assurer un remplacement aisé du capteur, ergonomique, relativement rapide, et par conséquent économique. - It ensures easy replacement of the sensor, ergonomic, relatively fast, and therefore economical.

Claims

Revendications claims
1 . Dispositif de mesure du régime d'un arbre rotatif, constitué d'un capteur de mesure de vitesse (10), qui présente une partie active (12) proche d'une cible (1 ) solidaire en rotation de l'arbre rotatif (A), une partie de centrage (14) permettant le centrage du capteur (10) en vue de sa fixation sur une pièce fixe (20) en regard de la cible (1 ) , une partie de connectique (16), et une partie intermédiaire (13) reliant ladite partie active (12) à la partie de centrage (14) du capteur (10), ledit dispositif de mesure étant caractérisé en ce que la partie active (12) du capteur est désaxée par rapport à la partie de centrage (14), et en ce que cette partie active (12) est désaxée par rapport à ladite partie intermédiaire (13), elle-même désaxée par rapport à la partie de centrage (14) du capteur (10). 1. Device for measuring the speed of a rotary shaft, consisting of a speed measuring sensor (10), which has an active part (12) close to a target (1) integral in rotation with the rotary shaft (A) ), a centering portion (14) for centering the sensor (10) for attachment to a fixed piece (20) facing the target (1), a connector portion (16), and an intermediate portion (13) connecting said active part (12) to the centering part (14) of the sensor (10), said measuring device being characterized in that the active part (12) of the sensor is off-axis with respect to the centering part (14), and in that this active portion (12) is offset from said intermediate portion (13), itself offset from the centering portion (14) of the sensor (10).
2. Dispositif de mesure selon la revendication 1 , caractérisé en ce que la partie de centrage (14) est de forme cylindrique et est destinée à être insérée dans un alésage cylindrique (21 ) correspondant de ladite pièce fixe (20) en regard de la cible (1 ). 2. Measuring device according to claim 1, characterized in that the centering portion (14) is of cylindrical shape and is intended to be inserted into a corresponding cylindrical bore (21) of said fixed part (20) opposite the target (1).
3. Dispositif de mesure selon la revendication 2, caractérisé en ce que la longueur axiale (« I ») de la partie de centrage (14) du capteur (10) est de l'ordre ou voisine de 1 ,5 fois le diamètre (« D ») de cette partie de centrage (14). 3. Measuring device according to claim 2, characterized in that the axial length ("I") of the centering portion (14) of the sensor (10) is of the order or close to 1.5 times the diameter ( "D") of this centering portion (14).
4. Dispositif de mesure selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le capteur (10) de mesure de vitesse est un capteur magnétique. 4. Measuring device according to any one of claims 1 to 3, characterized in that the sensor (10) for measuring speed is a magnetic sensor.
5. Dispositif de mesure selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'arbre rotatif (A) est l'arbre primaire d'une boîte de vitesses d'un véhicule, et en ce que ladite pièce fixe (20), sur laquelle est centré en vue de sa fixation le capteur (10), est le carter de la boîte de vitesses. 5. Measuring device according to any one of claims 1 to 4, characterized in that the rotary shaft (A) is the primary shaft of a gearbox of a vehicle, and in that said fixed part (20), on which is centered for its attachment the sensor (10), is the housing of the gearbox.
6. Dispositif de mesure selon la revendication 5, caractérisé en ce que la cible (1 ) est la denture d'un pignon solidaire en rotation de l'arbre primaire de boîte de vitesses (A). 6. Measuring device according to claim 5, characterized in that the target (1) is the toothing of a pinion integral in rotation with the primary shaft of gearbox (A).
7. Véhicule, en particulier véhicule automobile, caractérisé en ce qu'il comporte au moins un dispositif de mesure du régime d'un arbre rotatif (A), et en ce que ce dispositif de mesure est conforme à l'une quelconque des revendications 1 à 6. Vehicle, in particular a motor vehicle, characterized in that it comprises at least one device for measuring the speed of a rotary shaft (A), and in that this measuring device is in accordance with any one of the claims. 1 to 6.
PCT/FR2016/051013 2015-05-27 2016-04-29 Device for measuring the speed of a rotary shaft, for example of an input shaft of a vehicle gearbox WO2016189213A1 (en)

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FR1554735A FR3036764B1 (en) 2015-05-27 2015-05-27 DEVICE FOR MEASURING THE REGIME OF A ROTARY SHAFT, FOR EXAMPLE OF A PRIMARY SHAFT OF A VEHICLE GEARBOX
FR1554735 2015-05-27

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0943844B1 (en) 1998-03-17 2003-08-06 WABCO GmbH & CO. OHG Method for controlling a transmission
EP1150041B1 (en) 2000-04-27 2005-06-15 DaimlerChrysler AG Arrangement for torque-free gear shifting
FR2894309A1 (en) * 2005-12-07 2007-06-08 Renault Sas MULTIDISTIC CLUTCH FOR A GEARBOX OF MOTOR VEHICLE, AND ASSOCIATED GEARBOX.
DE102007022777A1 (en) * 2007-05-15 2008-11-20 Zf Friedrichshafen Ag Sensor arrangement for a coupling device
DE102011119312A1 (en) * 2011-11-23 2013-05-23 Gm Global Technology Operations, Llc Shift collar for use in sensor arrangement of gear box of motor car to detect rotation speed of counter-shaft, has set of internal gears arranged at collar, and sensing region arranged at collar and arranged radially offset from sensor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0943844B1 (en) 1998-03-17 2003-08-06 WABCO GmbH & CO. OHG Method for controlling a transmission
EP1150041B1 (en) 2000-04-27 2005-06-15 DaimlerChrysler AG Arrangement for torque-free gear shifting
FR2894309A1 (en) * 2005-12-07 2007-06-08 Renault Sas MULTIDISTIC CLUTCH FOR A GEARBOX OF MOTOR VEHICLE, AND ASSOCIATED GEARBOX.
DE102007022777A1 (en) * 2007-05-15 2008-11-20 Zf Friedrichshafen Ag Sensor arrangement for a coupling device
DE102011119312A1 (en) * 2011-11-23 2013-05-23 Gm Global Technology Operations, Llc Shift collar for use in sensor arrangement of gear box of motor car to detect rotation speed of counter-shaft, has set of internal gears arranged at collar, and sensing region arranged at collar and arranged radially offset from sensor

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FR3036764B1 (en) 2017-06-16

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