EP0549459B1 - Totalizer with rotating coaxial drums - Google Patents

Totalizer with rotating coaxial drums Download PDF

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Publication number
EP0549459B1
EP0549459B1 EP92403516A EP92403516A EP0549459B1 EP 0549459 B1 EP0549459 B1 EP 0549459B1 EP 92403516 A EP92403516 A EP 92403516A EP 92403516 A EP92403516 A EP 92403516A EP 0549459 B1 EP0549459 B1 EP 0549459B1
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EP
European Patent Office
Prior art keywords
drum
drums
teeth
indexing
main shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP92403516A
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German (de)
French (fr)
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EP0549459A1 (en
Inventor
Alain Boucher
Jean-Pierre Guillou
Yves Valiton
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Marelli France SAS
Original Assignee
Magneti Marelli France SAS
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Publication of EP0549459A1 publication Critical patent/EP0549459A1/en
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
    • G06M1/00—Design features of general application
    • G06M1/22—Design features of general application for visual indication of the result of count on counting mechanisms, e.g. by window with magnifying lens
    • G06M1/26—Aligning means

Definitions

  • the present invention relates to the field of totalizers with rotary coaxial drums.
  • the present invention is particularly applicable to totalizers used on motor vehicles.
  • Document FR-A-2662001 offers another solution in an attempt to eliminate the misalignment between the figures.
  • This solution consists in providing on a first face of each drum 13 to 18 a first tubular body which extends coaxially with respect to each drum and has a series of indexing teeth on one of its ends, and on a second face of each drum a second tubular body which extends coaxially with respect to the drum and carries at its end two teeth capable of mating with the teeth formed on the first tubular body of an adjacent drum under the effect of the axial stress exerted on the stack of drums by a spring 19 engaged on the main shaft 20.
  • the object of the present invention is to improve the known totalizers.
  • the spring 100 according to the present invention is formed of a blade.
  • the leaf spring 100 is made of metal, for example phosphor bronze.
  • the leaf spring 100 according to the present invention is produced by cutting from a metal flank originally planar.
  • the spring leaf has an elongated shape. It has two planes of symmetry 104, 106 orthogonal and perpendicular to the plane of FIGS. 3 and 4.
  • the leaf spring 100 has before bending a generally rectangular shape.
  • the longitudinal edges of the blade 100 that is to say the longest edges thereof, parallel to the plane of symmetry 104, are referenced 110, 112.
  • the transverse edges of the spring blade 100 that is that is to say the shortest edges thereof, parallel to the plane of symmetry 106, are referenced 114, 116.
  • the angles 111, 113, 115, 117, of the leaf spring 100 are preferably rounded or truncated. Furthermore, the leaf spring 100 is provided in its center and on its longitudinal edges 110, 112 of circular protuberances 120, 122. These are centered on an axis 102 perpendicular to the plane of Figures 3 and 4. The axis 102 coincides with the intersection of the planes of symmetry 104, 106.
  • the leaf spring 100 is provided with an oblong hole 130 centered on the axis 102.
  • the hole 130 is elongated in the longitudinal direction, that is to say parallel to the plane of symmetry 104.
  • the spring leaf 100 is arched to take a general semi-cylindrical shape centered on an axis orthogonal to the axis 102 and to the plane of symmetry 104 and contained in the plane of symmetry 106.
  • the ends 107, 108 of the spring leaf 100 are bent in a direction opposite to the general curvature of the spring. That is to say that the ends 107, 108 have a general semi-cylindrical shape centered around respective axes perpendicular to the plane of symmetry 104, parallel to each other and parallel to the plane of symmetry 106.
  • the general concavity of the leaf spring 100 is directed to the left of this figure, while the concavities of the curvatures formed on the ends 107, 108 of the leaf spring are directed on the contrary to the right in Figure 5.
  • the leaf spring 100 rests on the frame 300 of the totalizer via its ends 107, 108, more precisely, by the face of its ends 107, 108 located on the side of the general concavity of the leaf spring , or on the left according to the representation given in FIG. 5. Thanks to the rounded shape of the ends 107, 108, it is avoided that the leaf spring 100 does not catch on the frame 300.
  • leaf spring 100 is provided on the protrusions 120, 122 and on either side of the bore 130, with two teeth 140.
  • the two teeth 140 are thus symmetrical with respect to the plane of symmetry 104.
  • each of the two teeth 140 is essentially formed by two planes 141, 142 symmetrical with respect to the plane 106.
  • the two planes 141, 142 meet at this plane of symmetry 106 in the form of a rounded vertex 143.
  • the inclination between the two planes 141, 142 is of the order of 90 °.
  • the two planes 141, 142 form a dihedral whose concavity is directed on the same side as the general curvature of the leaf spring 100, that is to the left of FIG. 5.
  • the two teeth 140 form protrusion on the top of the leaf spring 100.
  • the two teeth 140 thus constitute indexing teeth capable of cooperating with indexing structures provided on one of the end drums of the totalizer as will be explained below.
  • the length of the hole 130 considered parallel to the plane of symmetry 104 must be such that seen in axial projection, along the axis 102, the hole 130 appears in the form of a substantially circular bore of diameter greater than the diameter of the main tree receiving the drums.
  • the drum 200 is preferably made by molding plastic material.
  • the outer peripheral surface 204 of the drum 200 is cylindrical in revolution around the axis 202.
  • This peripheral surface 204 carries numbers, typically ten numbers from 0 to 9.
  • the drum 200 has a central bore 206, centered on the axis 202, complementary to the main shaft of the totalizer, that is to say having a substantially equal diameter, while being slightly greater than the diameter of this main shaft.
  • the first face of the drum 200 will be called, the face of the latter facing the lower order drum, or a toothed drive wheel for the lower order drum.
  • the face of the drum 200 facing the higher order drum will be called the second face of the drum 200.
  • the first face of the drum 200 is shown in FIG. 7, while the second face of the drum 200 is shown in FIG. 9.
  • Each of the two aforementioned faces carries drive teeth and indexing teeth.
  • the drive teeth formed on the first face of the drum 200 form a pinion 210 with external radial teeth regularly equi-distributed around the axis 202.
  • the drive teeth 210 are twenty in number according to the representation given in the figure 7.
  • the external envelope of the drive teeth 210 coincides with the external cylindrical surface of the drum 200.
  • the drive teeth provided on the second face of the drum 200 comprise two radial teeth 220, 222, adjacent in the same way as the teeth 210 and adjacent to the outer periphery of the drum 200.
  • a cylindrical rib 224 of revolution is provided on the outside of the two teeth 220, 222 and connects them.
  • the external diameter of the cylindrical rib 224 is equal to or substantially equal to the external diameter of the drum 200.
  • the axial height of the cylindrical rib 224 is less than the axial height of the teeth 220, 222, as can be seen in particular in FIG. 8.
  • the axial height H1 of the teeth 220, 222 is equal to twice the height H2 of the cylindrical rib 224.
  • the axial height H3 of the drive teeth 210 provided on the first face of the drum 200 is substantially equal to the axial height H2 of the cylindrical rib 224.
  • the aforementioned drive teeth 210, 220 and 222 are designed to mesh with pinions carried by the secondary shaft. More precisely, each of these pinions comprises an even number of teeth.
  • the teeth of even rank include an axial height substantially equal to H1 + H3, while the teeth of odd rank of the pinions have an axial height substantially equal to H1. More precisely still, said teeth of the pinions carried by the secondary shaft are placed opposite the drive teeth 210, 220, 222, the teeth of odd rank having a lower axial height being placed only opposite the drive teeth 210 and from the top of the drive teeth 220, 222, but not opposite the cylindrical rib 224.
  • the two drive teeth 220, 222 can extend on the inside of the cylindrical rib 224 by a cylindrical rib 226 of smaller diameter.
  • this rib 226 is preferably asymmetrical, for example truncated as shown diagrammatically in FIG. 9 under the references 227, 228 in order to facilitate the positioning of the drums in the original reference position during assembly of the totalizer.
  • the indexing teeth provided on the first face of the drum 200 comprise two teeth 230, 232 diametrically opposite with respect to the axis 202.
  • the teeth 230, 232 have an axial orientation opposite the axis 202. They are provided on a tubular body 234 centered on the axis 202.
  • the indexing teeth on the second face include a series of teeth 240 in number multiple of the number of digits provided on the outer periphery of the drum 200, that is to say according to the particular embodiment shown in the figures, ten teeth 240.
  • the teeth 240 are also oriented axially opposite the axis 202. They are provided on the top of a tubular body 242 centered on the axis 202 and having an external diameter equal to the diameter of the above-mentioned tubular body 234.
  • the two indexing teeth 230, 232 provided on the first face of a drum 200 are placed opposite the indexing teeth 240 provided on the second face of an adjacent lower order drum.
  • the axial thickness of the drum 200 at the indexing teeth 230, 232 and 240 is at least slightly greater than the axial thickness of the drum at the drive teeth 210, 220, 222.
  • the 200 stacked drums are only in contact at the indexing teeth 240, 230, 232. Therefore, any harmful friction between the drums 200 is avoided.
  • the two indexing teeth 230, 232 provided on the first face protrude slightly beyond a plane 250 normal to the axis 202 defined by the lateral face of the drive teeth 210, while the indexing teeth 240 provided on the second face protrude slightly beyond a plane 252 normal to the axis 202 defined by the lateral face of the drive teeth 220, 222 and the associated rib 226.
  • This frame 300 comprises two parallel housings 310, 320 designed to receive respectively a general totalizer and a partial totalizer.
  • a general totalizer is designed to total the mileage traveled by a motor vehicle since the commissioning thereof, while a partial totalizer is designed to total the mileage traveled from a chosen origin. To this end, the trip odometer can be reset.
  • the present invention can be applied to both the general counter and the partial counter.
  • the frame 300 comprises two generally parallel walls 340, 350 designed to receive by snap-fastening the main shaft carrying the coaxial drums 200 and the secondary shaft carrying the drive pinions.
  • each of the two opposite walls 340, 350 is provided with four generally cylindrical channels 341, 343, 345, 347, with converging edges, which open on an edge of the wall 340, 350 concerned.
  • the channels 341, 343, 345, 347 are connected to this edge by an engagement form 342, 344, 346, 348 flared in the direction of the concerned edge of the wall 340 or 350.
  • the diameter of the channels 341, 343, 345, 347 is generally complementary to the diameter of the associated main or secondary shaft, that is to say that the channels have a diameter slightly greater than the diameter of this tree.
  • the main shaft and the secondary shaft can be placed in the engagement forms 342, 344, 346, 348 and pushed into the channels 341, 343, 345, 347 respectively, by deformation of the material at the edges. converging channels, to cross the opening of these.
  • the main and secondary trees are then kept prisoners in the aforementioned canals.
  • These ribs 360, 361, 362, 363 are mutually parallel and parallel to the plane of symmetry of the engagement forms 344, 346.
  • the distance between the ribs 360, 361, 362, 363 respectively of each pair is substantially equal, while being slightly greater than the width of the leaf spring 100.
  • the operation of the totalizer according to the present invention is as follows.
  • the first gear 222 driving in the direction of rotation contacts an even order tooth of the pinion and drives it .
  • This drive is communicated to the higher order drum via the pinion.
  • the aforementioned even-order tooth of the pinion enters between the two drive teeth 220, 222.
  • the rotation of the pinion and of the drum 200 of higher order is interrupted when the aforementioned even-order tooth of the pinion escapes the two teeth d drive 220, 222.
  • the higher order drum is thus advanced by one step and the totalizer is ready for a new revolution of the lower order drum.
  • the spring biases the indexing teeth 230, 232, 240 in engagement.
  • the leaf spring 100 imposes stable positions on the drum 200 and guarantees perfect alignment of these.
  • the totalizer according to the present invention is economical, simple to assemble, and perfectly reliable.
  • each drum 200 It is also possible to provide on the first face of each drum 200 with a number of indexing teeth other than two.
  • each drum is provided on its first face with a structure 260 that is not symmetrical in revolution. This is intended to cooperate with a drive structure at the input of the totalizer, for example a key or an equivalent means linked to an input pinion. As a variant, this input pinion could come directly into engagement with the drive teeth 210.
  • the leaf spring 100 can be made of plastic and not of metal.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Springs (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Mechanical Operated Clutches (AREA)

Description

La présente invention concerne le domaine des totalisateurs à tambours coaxiaux rotatifs.The present invention relates to the field of totalizers with rotary coaxial drums.

La présente invention s'applique tout particulièrement aux totalisateurs utilisés sur véhicules automobiles.The present invention is particularly applicable to totalizers used on motor vehicles.

On a déjà proposé de nombreux totalisateurs du type comprenant :

  • un bati qui porte :
  • un arbre principal,
  • une pluralité de tambours coaxiaux rotatifs montés sur l'arbre principal, munis de chiffres sur leur périphérie externe et pourvus sur chacune de leurs deux faces transversales à l'arbre principal, de dents d'entraînement,
  • un arbre secondaire parallèle à l'arbre principal, et
  • une pluralité de pignons d'entraînement coaxiaux rotatifs montés sur l'arbre secondaire respectivement en regard des dents d'entraînement des tambours de sorte qu'après une révolution complète chaque tambour entraîne le tambour d'ordre supérieur par l'intermédiaire d'un pignon associé.
Many totalizers of the type have already been proposed comprising:
  • a frame that carries:
  • a main tree,
  • a plurality of rotary coaxial drums mounted on the main shaft, provided with numbers on their external periphery and provided on each of their two faces transverse to the main shaft, with drive teeth,
  • a secondary tree parallel to the main tree, and
  • a plurality of rotary coaxial drive pinions mounted on the secondary shaft respectively opposite the drum drive teeth so that after a complete revolution each drum drives the higher order drum via a pinion associated.

Les totalisateurs connus du type précité ont déjà rendu de grands services.The known totalizers of the aforementioned type have already rendered great services.

Toutefois, ils ne donnent pas totalement satisfaction.However, they are not entirely satisfactory.

En particulier, on constate que les chiffres prévus sur les différents tambours ne sont pas toujours alignés correctement.In particular, it can be seen that the figures provided on the different drums are not always aligned correctly.

Ce défaut d'alignement entre les chiffres est dû au fait que la position des tambours est définie généralement par les pignons associés et qu'il existe un jeu inévitable entre ces pignons et les dents d'entraînement prévues sur les disques.This misalignment between the figures is due to the fact that the position of the drums is generally defined by the associated pinions and that there is an inevitable play between these pinions and the drive teeth provided on the discs.

Par ailleurs, ces jeux entre pignons et dents d'entraînement s'ajoutent et conduisent à un désalignement croissant des chiffres, par rapport à la position de consigne souhaitée, dans le sens croissant de l'ordre des tambours.In addition, these clearances between pinions and drive teeth are added and lead to an increasing misalignment of the figures, with respect to the desired set position, in the increasing direction of the order of the drums.

Pour tenter de réduire le désalignement des chiffres, on a proposé dans le document FR-A-2653580 comme montré sur la figure 1 annexée qui reprend la figure 1 de ce document, d'utiliser un ressort à lame 10 qui coopère avec une came prismatique 11 fixée pour tourner avec l'un des pignons 12. Ce pignon 12 peut être associé au tambour d'ordre le plus élevé du totalisateur 18 ou à un tambour d'ordre intermédiaire 14 à 17.In an attempt to reduce the misalignment of the figures, it has been proposed in the document FR-A-2653580 as shown in the appended FIG. 1 which reproduces FIG. 1 of this document, to use a leaf spring 10 which cooperates with a prismatic cam 11 fixed to rotate with one of the pinions 12. This pinion 12 can be associated with the highest order drum of the totalizer 18 or with an intermediate order drum 14 to 17.

La solution donnée dans le document FR-A-2653580 améliore la situation. Toutefois, elle ne donne pas totalement satisfaction. En effet, elle permet seulement de réduire le désalignement des chiffres, mais elle ne permet pas d'éliminer totalement ce désalignement. Par ailleurs, la solution donnée dans ce document est assez couteuse et augmente sensiblement le couple d'entraînement d'entrée exigé sur le tambour d'ordre inférieur 13.The solution given in document FR-A-2653580 improves the situation. However, it is not entirely satisfactory. Indeed, it only makes it possible to reduce the misalignment of the figures, but it does not make it possible to completely eliminate this misalignment. Furthermore, the solution given in this document is quite expensive and appreciably increases the input drive torque required on the lower order drum 13.

Le document FR-A-2662001 dont la figure 1 est reprise sous forme de figure 2 ci-jointe propose une autre solution pour tenter d'éliminer le désalignement entre les chiffres. Cette solution consiste à prévoir sur une première face de chaque tambour 13 à 18 un premier corps tubulaire qui sétend coaxialement par rapport à chaque tambour et présente une série de dentures d'indexage à l'une de ses extrémités, et sur une seconde face de chaque tambour un second corps tubulaire qui s'étend coaxialement par rapport au tambour et porte à son extrémité deux dentures aptes à s'accoupler aux dentures formées sur le premier corps tubulaire d'un tambour adjacent sous l'effet de la sollicitation axiale exercée sur l'empilement de tambours par un ressort 19 engagé sur l'arbre principal 20.Document FR-A-2662001, FIG. 1 of which is reproduced in the form of attached FIG. 2, offers another solution in an attempt to eliminate the misalignment between the figures. This solution consists in providing on a first face of each drum 13 to 18 a first tubular body which extends coaxially with respect to each drum and has a series of indexing teeth on one of its ends, and on a second face of each drum a second tubular body which extends coaxially with respect to the drum and carries at its end two teeth capable of mating with the teeth formed on the first tubular body of an adjacent drum under the effect of the axial stress exerted on the stack of drums by a spring 19 engaged on the main shaft 20.

La solution proposée dans le document FR-A-2662001 permet d'améliorer nettement la situation. Cependant, elle s'avère également assez couteuse. Par ailleurs, le montage des totalisateurs décrits dans le document FR-A-2662001 est assez délicat, du fait en particulier que cette solution exige une rondelle 21 servant d'appui au ressort 19, sur l'arbre principal 20, un disque 23 équipé d'un premier corps tubulaire à dentures adjacent au tambour d'ordre supérieur 18, et un arbre auxiliaire 22 servant d'arrêt au disque 23.The solution proposed in document FR-A-2662001 makes it possible to improve the situation considerably. However, it is also quite expensive. Furthermore, the mounting of the totalizers described in the document FR-A-2662001 is quite delicate, in particular because this solution requires a washer 21 serving as a support for the spring 19, on the main shaft 20, a disc 23 equipped a first tubular body with teeth adjacent to the higher-order drum 18, and an auxiliary shaft 22 serving to stop the disc 23.

Le but de la présente invention est de perfectionner les totalisateurs connus.The object of the present invention is to improve the known totalizers.

Ce but est atteint selon la présente invention grâce à un totalisateur du type connu comprenant :

  • un bati qui loge :
  • un arbre principal,
  • une pluralité de tambours coaxiaux rotatifs montés sur l'arbre principal, munis de chiffres sur leur périphérie externe et pourvus sur chacune de leurs faces transversales à l'arbre principal, d'une part de dents d'entraînement, d'autre part de dentures d'indexage,
  • un ressort exerçant un effort axial sur les tambours pour maintenir en contact les dentures d'indexage prévues sur les faces en regard de chaque paire de tambours adjacents,
  • un arbre secondaire parallèle à l'arbre principal, et
  • une pluralité de pignons d'entraînement coaxiaux rotatifs montés sur l'arbre secondaire respectivement en regard des dents d'entraînement des tambours de sorte qu'après une révolution complète, chaque tambour entraîne le tambour d'ordre supérieur par l'intermédiaire d'un pignon associé,
caractérisé par le fait que le ressort est formé d'une lame engagée sur l'arbre principal, à l'une des extrémités de l'empilement de tambours, immobilisée en rotation autour de l'axe de cet arbre principal sur le bati, et munie de dentures d'indexage aptes à coopérer avec les dentures d'indexage liées à la face en regard du tambour d'extrémité adjacent.This object is achieved according to the present invention by means of a totalizer of the known type comprising:
  • a building that houses:
  • a main tree,
  • a plurality of rotary coaxial drums mounted on the main shaft, provided with numbers on their external periphery and provided on each of their faces transverse to the main shaft, on the one hand of drive teeth, on the other hand of teeth indexing,
  • a spring exerting an axial force on the drums to maintain in contact the indexing teeth provided on the facing faces of each pair of adjacent drums,
  • a secondary tree parallel to the main tree, and
  • a plurality of rotary coaxial drive pinions mounted on the secondary shaft respectively opposite the drum drive teeth so that after a complete revolution, each drum drives the higher order drum via a associated pinion,
characterized by the fact that the spring is formed by a blade engaged on the main shaft, at one of the ends of the stack of drums, immobilized in rotation around the axis of this main shaft on the frame, and provided with indexing teeth capable of cooperating with the indexing teeth linked to the opposite face of the adjacent end drum.

D'autres caractéristiques, buts et avantages de la présente invention apparaîtront à la lecture de la description détaillée qui va suivre et en regard des dessins annexés donnés à titre d'exemple non limitatif et sur lesquels :

  • la figure 1 précédemment décrite représente une vue en perspective éclatée d'un totalisateur conforme au document FR-A-2653580,
  • la figure 2 précédemment décrite représente une vue en perspective d'un totalisateur conforme au document FR-A-2662001,
  • la figure 3 représente une vue de face d'une lame ressort conforme à la présente invention, avant cambrage,
  • la figure 4 représente une vue de face de la même lame ressort conforme à la présente invention, après cambrage,
  • la figure 5 représente une vue latérale après cambrage de la lame ressort conforme à la présente invention,
  • la figure 6 représente une vue latérale de la même lame ressort conforme à la présente invention, sous une charge axiale,
  • la figure 7 représente une première vue axiale d'un tambour conforme à la présente invention,
  • la figure 8 représente une vue en coupe axiale du même tambour selon le plan de coupe référencé VIII-VIII sur la figure 9,
  • la figure 9 représente une seconde vue axiale d'un tambour conforme à la présente invention,
  • la figure 10 représente une vue en perspective d'un bati de totalisateur conforme à la présente invention,
  • la figure 11 représente une vue en coupe du bati totalisateur selon le plan de coupe référencé XI-XI sur la figure 12,
  • la figure 12 représente une vue de dessus de ce bati, et
  • la figure 13 représente schématiquement l'empilement de tambours indexés et de la lame ressort conforme à la présente invention dans le bati.
Other characteristics, aims and advantages of the present invention will appear on reading the detailed description which follows and with reference to the appended drawings given by way of non-limiting example and in which:
  • FIG. 1, previously described, shows an exploded perspective view of a totalizer in accordance with document FR-A-2653580,
  • FIG. 2 previously described represents a perspective view of a totalizer in accordance with document FR-A-2662001,
  • FIG. 3 represents a front view of a spring leaf in accordance with the present invention, before bending,
  • FIG. 4 represents a front view of the same leaf spring in accordance with the present invention, after bending,
  • FIG. 5 represents a side view after bending of the leaf spring in accordance with the present invention,
  • FIG. 6 represents a side view of the same leaf spring in accordance with the present invention, under an axial load,
  • FIG. 7 represents a first axial view of a drum according to the present invention,
  • FIG. 8 represents a view in axial section of the same drum according to the cutting plane referenced VIII-VIII in FIG. 9,
  • FIG. 9 shows a second axial view of a drum according to the present invention,
  • FIG. 10 represents a perspective view of a totalizer frame according to the present invention,
  • FIG. 11 represents a sectional view of the totalizing frame according to the cutting plane referenced XI-XI in FIG. 12,
  • FIG. 12 represents a top view of this frame, and
  • FIG. 13 schematically represents the stack of indexed drums and of the spring leaf according to the present invention in the frame.

On va tout d'abord décrire, la structure du ressort 100 conforme à la présente invention représenté sur les figures 3 à 6.We will first describe the structure of the spring 100 according to the present invention shown in FIGS. 3 to 6.

Le ressort 100 conforme à la présente invention est formé d'une lame. De préférence, la lame ressort 100 est constituée de métal, par exemple en bronze au phosphore.The spring 100 according to the present invention is formed of a blade. Preferably, the leaf spring 100 is made of metal, for example phosphor bronze.

La lame ressort 100 conforme à la présente invention est réalisée par découpe dans un flanc métallique plan à l'origine.The leaf spring 100 according to the present invention is produced by cutting from a metal flank originally planar.

La lame ressort possède une forme allongée. Elle présente deux plans de symétrie 104, 106 orthogonaux et perpendiculaires au plan des figures 3 et 4.The spring leaf has an elongated shape. It has two planes of symmetry 104, 106 orthogonal and perpendicular to the plane of FIGS. 3 and 4.

Plus précisément, la lame ressort 100 présente avant cambrage une forme générale rectangulaire.More specifically, the leaf spring 100 has before bending a generally rectangular shape.

Les bords longitudinaux de la lame 100, c'est-à-dire les bords les plus longs de celle-ci, parallèle au plan de symétrie 104, sont référencés 110, 112. Les bords transversaux de la lame ressort 100, c'est-à-dire les bords les plus courts de celle-ci, parallèles au plan de symétrie 106, sont référencés 114, 116.The longitudinal edges of the blade 100, that is to say the longest edges thereof, parallel to the plane of symmetry 104, are referenced 110, 112. The transverse edges of the spring blade 100, that is that is to say the shortest edges thereof, parallel to the plane of symmetry 106, are referenced 114, 116.

Les angles 111, 113, 115, 117, de la lame ressort 100 sont de préférence arrondis ou tronqués. Par ailleurs, la lame ressort 100 est munie en son centre et sur ses bords longitudinaux 110, 112 d'excroissances circulaires 120, 122. Celles-ci sont centrées sur un axe 102 perpendiculaire au plan des figures 3 et 4. L'axe 102 coïncide avec l'intersection des plans de symétrie 104, 106.The angles 111, 113, 115, 117, of the leaf spring 100 are preferably rounded or truncated. Furthermore, the leaf spring 100 is provided in its center and on its longitudinal edges 110, 112 of circular protuberances 120, 122. These are centered on an axis 102 perpendicular to the plane of Figures 3 and 4. The axis 102 coincides with the intersection of the planes of symmetry 104, 106.

La lame ressort 100 est munie d'un perçage oblong 130 centré sur l'axe 102. Le perçage 130 est allongé dans le sens longitudinal, c'est-à-dire parallèlement au plan de symétrie 104.The leaf spring 100 is provided with an oblong hole 130 centered on the axis 102. The hole 130 is elongated in the longitudinal direction, that is to say parallel to the plane of symmetry 104.

Après découpe de l'ébauche représentée sur la figure 3, la lame ressort est cambrée comme représenté sur les figures 4 et 5.After cutting the blank shown in FIG. 3, the leaf spring is arched as shown in FIGS. 4 and 5.

Plus précisément, la lame ressort 100 est cambrée pour prendre une forme générale hémicylindrique centrée sur un axe orthogonal à l'axe 102 et au plan de symétrie 104 et contenu dans le plan de symétrie 106.More precisely, the spring leaf 100 is arched to take a general semi-cylindrical shape centered on an axis orthogonal to the axis 102 and to the plane of symmetry 104 and contained in the plane of symmetry 106.

Par ailleurs, les extrémités 107, 108 de la lame ressort 100 sont recourbées dans un sens inverse de la courbure générale du ressort. C'est-à-dire que les extrémités 107, 108 ont une forme générale hémicylindrique centrées autour d'axes respectifs perpendiculaires au plan de symétrie 104, parallèles entre eux et parallèles au plan de symétrie 106.Furthermore, the ends 107, 108 of the spring leaf 100 are bent in a direction opposite to the general curvature of the spring. That is to say that the ends 107, 108 have a general semi-cylindrical shape centered around respective axes perpendicular to the plane of symmetry 104, parallel to each other and parallel to the plane of symmetry 106.

Selon la représentation donnée sur la figure 5, la concavité générale de la lame ressort 100 est dirigée vers la gauche de cette figure, tandis que les concavités des courbures formées sur les extrémités 107, 108 de la lame ressort sont dirigées au contraire vers la droite de la figure 5.According to the representation given in FIG. 5, the general concavity of the leaf spring 100 is directed to the left of this figure, while the concavities of the curvatures formed on the ends 107, 108 of the leaf spring are directed on the contrary to the right in Figure 5.

A l'utilisation, la lame ressort 100 repose sur le bati 300 du totalisateur par l'intermédiaire de ses extrémités 107, 108, plus précisément, par la face de ses extrémités 107, 108 situées du côté de la concavité générale de la lame ressort, soit sur la gauche selon la représentation donnée sur la figure 5. Grâce à la forme arrondie des extrémités 107, 108, on évite que la lame ressort 100 ne s'accroche sur le bati 300.In use, the leaf spring 100 rests on the frame 300 of the totalizer via its ends 107, 108, more precisely, by the face of its ends 107, 108 located on the side of the general concavity of the leaf spring , or on the left according to the representation given in FIG. 5. Thanks to the rounded shape of the ends 107, 108, it is avoided that the leaf spring 100 does not catch on the frame 300.

De plus, la lame ressort 100 est munie sur les excroissances 120, 122 et de part et d'autre du perçage 130, de deux dentures 140.In addition, the leaf spring 100 is provided on the protrusions 120, 122 and on either side of the bore 130, with two teeth 140.

Les deux dentures 140 sont ainsi symétriques entre elles par rapport au plan de symétrie 104.The two teeth 140 are thus symmetrical with respect to the plane of symmetry 104.

Par ailleurs, chacune des deux dentures 140 est formée essentiellement de deux plans 141, 142 symétriques par rapport au plan 106. Les deux plans 141, 142 se rejoignent au niveau de ce plan de symétrie 106 sous forme d'un sommet arrondi 143.Furthermore, each of the two teeth 140 is essentially formed by two planes 141, 142 symmetrical with respect to the plane 106. The two planes 141, 142 meet at this plane of symmetry 106 in the form of a rounded vertex 143.

L'inclinaison entre les deux plans 141, 142 est de l'ordre de 90°.The inclination between the two planes 141, 142 is of the order of 90 °.

Les deux plans 141, 142 forment un dièdre dont la concavité est dirigée du même côté que la courbure générale de la lame ressort 100, soit vers la gauche de la figure 5. En d'autres termes, les deux dentures 140 forment saillie sur le sommet de la lame ressort 100. Les deux dentures 140 constituent ainsi des dentures d'indexage aptes à coopérer avec des structures d'indexage prévues sur l'un des tambours d'extrémité du totalisateur comme cela sera précisé par la suite.The two planes 141, 142 form a dihedral whose concavity is directed on the same side as the general curvature of the leaf spring 100, that is to the left of FIG. 5. In other words, the two teeth 140 form protrusion on the top of the leaf spring 100. The two teeth 140 thus constitute indexing teeth capable of cooperating with indexing structures provided on one of the end drums of the totalizer as will be explained below.

On notera que la longueur du perçage 130 considérée parallèlement au plan de symétrie 104 doit être telle que vue en projection axiale, selon l'axe 102, le perçage 130 apparaisse sous forme d'un alésage sensiblement circulaire de diamètre supérieur au diamètre de l'arbre principal recevant les tambours.It will be noted that the length of the hole 130 considered parallel to the plane of symmetry 104 must be such that seen in axial projection, along the axis 102, the hole 130 appears in the form of a substantially circular bore of diameter greater than the diameter of the main tree receiving the drums.

On va maintenant décrire la structure du tambour représentée sur les figures 7 à 9.We will now describe the structure of the drum shown in FIGS. 7 to 9.

Le tambour 200 est réalisé de préférence par moulage de matière plastique.The drum 200 is preferably made by molding plastic material.

Il est centré sur un axe 202.It is centered on an axis 202.

La surface périphérique extérieure 204 du tambour 200 est cylindrique de révolution autour de l'axe 202. Cette surface périphérique 204 porte des chiffres, typiquement dix chiffres de 0 à 9.The outer peripheral surface 204 of the drum 200 is cylindrical in revolution around the axis 202. This peripheral surface 204 carries numbers, typically ten numbers from 0 to 9.

Le tambour 200 possède un alésage central 206, centré sur l'axe 202, complémentaire de l'arbre principal du totalisateur, c'est-à-dire présentant un diamètre sensiblement égal, tout en étant légèrement supérieur au diamètre de cet arbre principal.The drum 200 has a central bore 206, centered on the axis 202, complementary to the main shaft of the totalizer, that is to say having a substantially equal diameter, while being slightly greater than the diameter of this main shaft.

Par la suite, on appellera première face du tambour 200, la face de celui-ci dirigée vers le tambour d'ordre inférieur, ou une roue dentée d'entraînement pour le tambour d'ordre le plus faible.Thereafter, the first face of the drum 200 will be called, the face of the latter facing the lower order drum, or a toothed drive wheel for the lower order drum.

Par ailleurs, on appellera seconde face du tambour 200 la face de celui-ci dirigée vers le tambour d'ordre supérieur.Furthermore, the face of the drum 200 facing the higher order drum will be called the second face of the drum 200.

La première face du tambour 200 est représentée sur la figure 7, tandis que la seconde face du tambour 200 est représentée sur la figure 9.The first face of the drum 200 is shown in FIG. 7, while the second face of the drum 200 is shown in FIG. 9.

Chacune des deux faces précitées porte des dents d'entraînement et des dentures d'indexage.Each of the two aforementioned faces carries drive teeth and indexing teeth.

Les dents d'entraînement formées sur la première face du tambour 200 forment un pignon 210 à dents radiales extérieures régulièrement équi-réparties autour de l'axe 202. Les dents d'entraînement 210 sont au nombre de vingt selon la représentation donnée sur la figure 7.The drive teeth formed on the first face of the drum 200 form a pinion 210 with external radial teeth regularly equi-distributed around the axis 202. The drive teeth 210 are twenty in number according to the representation given in the figure 7.

L'enveloppe externe des dents d'entraînement 210 coïncide avec la surface cylindrique externe du tambour 200.The external envelope of the drive teeth 210 coincides with the external cylindrical surface of the drum 200.

Les dents d'entraînement prévues sur la seconde face du tambour 200 comprennent deux dents radiales 220, 222, adjacentes de même pas que les dents 210 et adjacentes à la périphérie extérieure du tambour 200. Une nervure 224 cylindrique de révolution est prévue sur l'extérieur des deux dents 220, 222 et relie celles-ci. Le diamètre externe de la nervure cylindrique 224 est égal ou sensiblement égal au diamètre externe du tambour 200.The drive teeth provided on the second face of the drum 200 comprise two radial teeth 220, 222, adjacent in the same way as the teeth 210 and adjacent to the outer periphery of the drum 200. A cylindrical rib 224 of revolution is provided on the outside of the two teeth 220, 222 and connects them. The external diameter of the cylindrical rib 224 is equal to or substantially equal to the external diameter of the drum 200.

On notera que la hauteur axiale de la nervure cylindrique 224 est inférieure à la hauteur axiale des dents 220, 222, comme cela est visible notamment sur la figure 8.It will be noted that the axial height of the cylindrical rib 224 is less than the axial height of the teeth 220, 222, as can be seen in particular in FIG. 8.

De façon typique la hauteur axiale H1 des dents 220, 222 est égale au double de la hauteur H2 de la nervure cylindrique 224.Typically the axial height H1 of the teeth 220, 222 is equal to twice the height H2 of the cylindrical rib 224.

Par ailleurs, de préférence, la hauteur axiale H3 des dents d'entraînement 210 prévues sur la première face du tambour 200 est sensiblement égale à la hauteur axiale H2 de la nervure cylindrique 224.Furthermore, preferably, the axial height H3 of the drive teeth 210 provided on the first face of the drum 200 is substantially equal to the axial height H2 of the cylindrical rib 224.

Les dents d'entraînement 210, 220 et 222 précitées sont conçues pour engrèner avec des pignons portés par l'arbre secondaire. Plus précisément, chacun de ces pignons comprend un nombre pair de dents. Les dents de rang pair comprennent une hauteur axiale sensiblement égale à H1 + H3, tandis que les dents de rang impair des pignons ont une hauteur axiale sensiblement égale à H1. Plus précisément encore, lesdites dents des pignons portées par l'arbre secondaire sont placées en regard des dents d'entraînement 210, 220, 222, les dents de rang impair de plus faible hauteur axiale étant placées seulement en regard des dents d'entraînement 210 et du sommet des dents d'entraînement 220, 222, mais non point en regard de la nervure cylindrique 224.The aforementioned drive teeth 210, 220 and 222 are designed to mesh with pinions carried by the secondary shaft. More precisely, each of these pinions comprises an even number of teeth. The teeth of even rank include an axial height substantially equal to H1 + H3, while the teeth of odd rank of the pinions have an axial height substantially equal to H1. More precisely still, said teeth of the pinions carried by the secondary shaft are placed opposite the drive teeth 210, 220, 222, the teeth of odd rank having a lower axial height being placed only opposite the drive teeth 210 and from the top of the drive teeth 220, 222, but not opposite the cylindrical rib 224.

Le processus d'entraînement des tambours 200 sera explicité par la suite.The process of driving the drums 200 will be explained later.

On notera que les deux dents d'entraînement 220, 222 peuvent se prolonger sur l'intérieur de la nervure cylindrique 224 par une nervure cylindrique 226 de plus faible diamètre. Par ailleurs, cette nervure 226 est de préférence dissymétrique, par exemple tronquée comme schématisé sur la figure 9 sous les références 227, 228 afin de faciliter le positionnement des tambours en position de consigne d'origine lors du montage du totalisateur.It will be noted that the two drive teeth 220, 222 can extend on the inside of the cylindrical rib 224 by a cylindrical rib 226 of smaller diameter. Furthermore, this rib 226 is preferably asymmetrical, for example truncated as shown diagrammatically in FIG. 9 under the references 227, 228 in order to facilitate the positioning of the drums in the original reference position during assembly of the totalizer.

Les dentures d'indexage prévues sur la première face du tambour 200 comprennent deux dentures 230, 232 diamétralement opposées par rapport à l'axe 202. Les dentures 230, 232 ont une orientation axiale en regard de l'axe 202. Elles sont prévues sur un corps tubulaire 234 centré sur l'axe 202.The indexing teeth provided on the first face of the drum 200 comprise two teeth 230, 232 diametrically opposite with respect to the axis 202. The teeth 230, 232 have an axial orientation opposite the axis 202. They are provided on a tubular body 234 centered on the axis 202.

Les dentures d'indexage prévues sur la seconde face comprennent une série de dentures 240 en nombre multiple du nombre de chiffres prévus sur la périphérie extérieure du tambour 200, soit selon le mode de réalisation particulier représenté sur les figures, dix dentures 240.The indexing teeth on the second face include a series of teeth 240 in number multiple of the number of digits provided on the outer periphery of the drum 200, that is to say according to the particular embodiment shown in the figures, ten teeth 240.

Les dentures 240 sont également orientées axialement en regard de l'axe 202. Elles sont prévues sur le sommet d'un corps tubulaire 242 centré sur l'axe 202 et présentant un diamètre externe égal au diamètre du corps tubulaire 234 précité.The teeth 240 are also oriented axially opposite the axis 202. They are provided on the top of a tubular body 242 centered on the axis 202 and having an external diameter equal to the diameter of the above-mentioned tubular body 234.

Ainsi, à l'utilisation lorsque différents tambours sont empilés sur l'arbre principal, les deux dentures d'indexage 230, 232 prévues sur la première face d'un tambour 200 sont placées en regard des dentures d'indexage 240 prévues sur la seconde face d'un tambour adjacent d'ordre inférieur.Thus, in use when different drums are stacked on the main shaft, the two indexing teeth 230, 232 provided on the first face of a drum 200 are placed opposite the indexing teeth 240 provided on the second face of an adjacent lower order drum.

Par ailleurs, l'épaisseur axiale du tambour 200 au niveau des dentures d'indexage 230, 232 et 240 est au moins légèrement supérieure à l'épaisseur axiale du tambour au niveau des dents d'entraînement 210, 220, 222. Ainsi, les tambours 200 empilés sont seulement en contact au niveau des dents d'indexage 240, 230, 232. De ce fait, on évite toute friction néfaste entre les tambours 200.Furthermore, the axial thickness of the drum 200 at the indexing teeth 230, 232 and 240 is at least slightly greater than the axial thickness of the drum at the drive teeth 210, 220, 222. Thus, the 200 stacked drums are only in contact at the indexing teeth 240, 230, 232. Therefore, any harmful friction between the drums 200 is avoided.

Plus précisément encore, selon le mode de réalisation représenté sur les figures annexées, notamment sur la figure 8, les deux dentures d'indexage 230, 232 prévues sur la première face font légèrement saillie au-delà d'un plan 250 normal à l'axe 202 défini par la face latérale des dents d'entraînement 210, tandis que les dentures d'indexage 240 prévues sur la seconde face font légèrement saillie au-delà d'un plan 252 normal à l'axe 202 défini par la face latérale des dents d'entraînement 220, 222 et la nervure 226 associée.More precisely still, according to the embodiment shown in the appended figures, in particular in FIG. 8, the two indexing teeth 230, 232 provided on the first face protrude slightly beyond a plane 250 normal to the axis 202 defined by the lateral face of the drive teeth 210, while the indexing teeth 240 provided on the second face protrude slightly beyond a plane 252 normal to the axis 202 defined by the lateral face of the drive teeth 220, 222 and the associated rib 226.

On va maintenant décrire les caractéristiques essentielles du bati 300 représenté sur les figures 10 à 12.We will now describe the essential characteristics of the frame 300 shown in FIGS. 10 to 12.

On notera à l'examen de la figure 10, que ce bati à une forme fort complexe. Celle-ci ne sera pas décrite dans le détail par la suite.It will be noted on examining FIG. 10 that this frame has a very complex shape. This will not be described in detail later.

On se contentera dans le cadre de la présente demande de décrire les caractéristiques essentielles du bati propres à l'invention. Ce bati 300 comprend deux logements parallèles 310, 320 conçus pour recevoir respectivement un totalisateur général et un totalisateur partiel.In the context of the present application, it will be sufficient to describe the essential characteristics of the frame specific to the invention. This frame 300 comprises two parallel housings 310, 320 designed to receive respectively a general totalizer and a partial totalizer.

On rappelle qu'un totalisateur général est conçu pour totaliser le kilométrage parcouru par un véhicule automobile depuis la mise en service de celui-ci, tandis qu'un totalisateur partiel est conçu pour totaliser le kilométrage parcouru depuis une origine choisie. A cette fin, le totalisateur partiel est susceptible de remise à zéro.It will be recalled that a general totalizer is designed to total the mileage traveled by a motor vehicle since the commissioning thereof, while a partial totalizer is designed to total the mileage traveled from a chosen origin. To this end, the trip odometer can be reset.

La présente invention peut s'appliquer aussi bien au totalisateur général qu'au totalisateur partiel.The present invention can be applied to both the general counter and the partial counter.

Le bati 300 comprend deux parois 340, 350 généralement parallèles conçues pour recevoir par encliquetage l'arbre principal portant les tambours coaxiaux 200 et l'arbre secondaire portant les pignons d'entraînement.The frame 300 comprises two generally parallel walls 340, 350 designed to receive by snap-fastening the main shaft carrying the coaxial drums 200 and the secondary shaft carrying the drive pinions.

A cette fin, chacune des deux parois 340, 350 opposées est munie de quatre canaux 341, 343, 345, 347 généralement cylindriques, à bords convergents, qui débouchent sur une arête de la paroi 340, 350 concernée. Les canaux 341, 343, 345, 347 sont reliés à cette arête par une forme d'engagement 342, 344, 346, 348 évasée en direction de l'arête concernée de la paroi 340 ou 350.To this end, each of the two opposite walls 340, 350 is provided with four generally cylindrical channels 341, 343, 345, 347, with converging edges, which open on an edge of the wall 340, 350 concerned. The channels 341, 343, 345, 347 are connected to this edge by an engagement form 342, 344, 346, 348 flared in the direction of the concerned edge of the wall 340 or 350.

Le diamètre des canaux 341, 343, 345, 347 est généralement complémentaire du diamètre de l'arbre principal ou secondaire associé, c'est-à-dire que les canaux ont un diamètre légèrement supérieur au diamètre de cet arbre. Ainsi, l'arbre principal et l'arbre secondaire peuvent être placés dans les formes d'engagement 342, 344, 346, 348 et poussés dans les canaux 341, 343, 345, 347 respectivement, par déformation de la matière au niveau des bords convergents des canaux, pour franchir l'ouverture de ceux-ci. Les arbres principal et secondaire sont alors maintenus prisonniers dans les canaux précités.The diameter of the channels 341, 343, 345, 347 is generally complementary to the diameter of the associated main or secondary shaft, that is to say that the channels have a diameter slightly greater than the diameter of this tree. Thus, the main shaft and the secondary shaft can be placed in the engagement forms 342, 344, 346, 348 and pushed into the channels 341, 343, 345, 347 respectively, by deformation of the material at the edges. converging channels, to cross the opening of these. The main and secondary trees are then kept prisoners in the aforementioned canals.

Les dispositions précédemment décrites concernant le bati 300 sont connues en soi de l'homme de l'art.The previously described arrangements for the frame 300 are known per se to those skilled in the art.

Cependant, comme cela est représenté sur les figures annexées, selon la présente invention, il est prévu sur l'une des parois 340, de préférence sur la paroi 340 placée du côté du tambour 200 d'ordre supérieur, et sur la surface interne de cette paroi, une paire de nervures 360, 361, 362, 363 rectilignes associées à chaque forme d'engagement 344, 346 destinées à recevoir un arbre principal. Ces nervures 360, 361, 362, 363 sont parallèles entre elles et parallèles au plan de symétrie des formes d'engagement 344, 346.However, as shown in the appended figures, according to the present invention, it is provided on one of the walls 340, preferably on the wall 340 placed on the side of the drum 200 of higher order, and on the internal surface of this wall, a pair of ribs 360, 361, 362, 363 rectilinear associated with each form of engagement 344, 346 intended to receive a main shaft. These ribs 360, 361, 362, 363 are mutually parallel and parallel to the plane of symmetry of the engagement forms 344, 346.

La distance séparant les nervures 360, 361, 362, 363 respectivement de chaque paire est sensiblement égale, tout en étant légèrement supérieure à la largeur de la lame ressort 100. Ainsi, lorsque la lame ressort 100 est engagée sur l'arbre principal, la lame 100 prend position entre les deux nervures 360 et 361 ou 362 et 363. De ce fait, la lame ressort 100 est automatiquement immobilisée à rotation sur le bati 300.The distance between the ribs 360, 361, 362, 363 respectively of each pair is substantially equal, while being slightly greater than the width of the leaf spring 100. Thus, when the leaf spring 100 is engaged on the main shaft, the blade 100 takes position between the two ribs 360 and 361 or 362 and 363. As a result, the leaf spring 100 is automatically immobilized in rotation on the frame 300.

En conclusion, après montage, le totalisateur conforme à la présente invention comprend :

  • un bati 300 qui loge :
  • un arbre principal placé dans les canaux 343,
  • une pluralité de tambours 200 coaxiaux rotatifs montés sur l'arbre principal, munis de chiffres sur leur périphérie externe et pourvus sur chacune de leur face transversale à l'arbre principal d'une part, de dents d'entraînement 210, 220, 222, d'autre part de dentures d'indexage 230, 232, 240,
  • une lame ressort 100 engagée sur l'arbre principal à l'une des extrémités de l'empilement de tambours, la lame ressort 100 étant immobilisée à rotation autour de l'axe de cet arbre principal, sur le bati 300, et
  • la lame ressort 100 exerçant un effort axial sur les tambours 200 pour maintenir en contact les dentures d'indexage 230, 232 prévues sur une première face d'un tambour avec les dentures d'indexage 240 prévues sur la seconde face d'un tambour adjacent, ladite lame ressort 100 étant munie en outre de dentures d'indexage 140 aptes à coopérer avec les dentures d'indexage 240 liées à la seconde face en regard du tambour d'extrémité adjacent,
  • un arbre secondaire parallèle à l'arbre principal maintenu dans les canaux 341 ou 347, et
  • une pluralité de pignons d'entraînement coaxiaux rotatifs montés sur l'arbre secondaire respectivement en regard des dents d'entraînement 210, 220, 222 des tambours 200 de sorte qu'après une révolution complète, chaque tambour 200 entraîne le tambour d'ordre supérieur par l'intermédiaire d'un pignon associé.
In conclusion, after mounting, the totalizer according to the present invention comprises:
  • a frame 300 which houses:
  • a main shaft placed in channels 343,
  • a plurality of coaxial rotary drums 200 mounted on the main shaft, provided with numbers on their external periphery and provided on each of their faces transverse to the main shaft on the one hand, with drive teeth 210, 220, 222, on the other hand, indexing teeth 230, 232, 240,
  • a spring blade 100 engaged on the main shaft at one end of the stack of drums, the spring blade 100 being immobilized in rotation about the axis of this main shaft, on the frame 300, and
  • the leaf spring 100 exerting an axial force on the drums 200 to maintain in contact the indexing teeth 230, 232 provided on a first face of a drum with the indexing teeth 240 provided on the second face of an adjacent drum , said leaf spring 100 being further provided with indexing teeth 140 capable of cooperating with the indexing teeth 240 linked to the second face opposite the adjacent end drum,
  • a secondary shaft parallel to the main shaft maintained in channels 341 or 347, and
  • a plurality of rotary coaxial drive pinions mounted on the secondary shaft respectively opposite the drive teeth 210, 220, 222 of the drums 200 so that after a complete revolution, each drum 200 drives the higher order drum via an associated pinion.

Pour l'essentiel, le fonctionnement du totalisateur conforme à la présente invention est le suivant.Essentially, the operation of the totalizer according to the present invention is as follows.

Si l'on suppose qu'une dent de rang impair d'un pignon, c'est-à-dire une dent de faible largeur est placée entre deux tambours 200 adjacents, en prise avec les dents d'entraînement 210 du tambour d'ordre supérieur, les deux dents adjacentes de rang pair du même pignon, c'est-à-dire les dents de forte largeur, reposent contre la nervure annulaire 224 du tambour d'ordre inférieur.If it is assumed that a tooth of odd rank of a pinion, that is to say a tooth of small width is placed between two adjacent drums 200, in engagement with the drive teeth 210 of the drum higher order, the two adjacent teeth of even rank of the same pinion, that is to say the teeth of large width, rest against the annular rib 224 of the lower order drum.

Lorsqu'après une révolution complète, les deux dents 220, 222 du tambour d'ordre inférieur approchent du pignon concerné, la première denture 222 d'entraînement dans le sens de rotation contacte une dent d'ordre pair du pignon et entraîne celui-ci. Cet entraînement est communiqué au tambour d'ordre supérieur par l'intermédiaire du pignon. La dent d'ordre pair précitée du pignon pénètre entre les deux dents d'entraînement 220, 222. La rotation du pignon et du tambour 200 d'ordre supérieur est interrompue lorsque la dent d'ordre pair précitée du pignon échappe aux deux dents d'entraînement 220, 222. Le tambour d'ordre supérieur est ainsi avancé d'un pas et le totalisateur est prêt pour une nouvelle révolution du tambour d'ordre inférieur.When, after a complete revolution, the two teeth 220, 222 of the lower order drum approach the pinion concerned, the first gear 222 driving in the direction of rotation contacts an even order tooth of the pinion and drives it . This drive is communicated to the higher order drum via the pinion. The aforementioned even-order tooth of the pinion enters between the two drive teeth 220, 222. The rotation of the pinion and of the drum 200 of higher order is interrupted when the aforementioned even-order tooth of the pinion escapes the two teeth d drive 220, 222. The higher order drum is thus advanced by one step and the totalizer is ready for a new revolution of the lower order drum.

Par ailleurs le ressort sollicite les dentures d'indexage 230, 232, 240 en prise. Ainsi, la lame ressort 100 impose des positions stables au tambour 200 et garantit un alignement parfait de ceux-ci.Furthermore, the spring biases the indexing teeth 230, 232, 240 in engagement. Thus, the leaf spring 100 imposes stable positions on the drum 200 and guarantees perfect alignment of these.

Le totalisateur conforme à la présente invention, est économique, de montage simple, et parfaitement fiable.The totalizer according to the present invention is economical, simple to assemble, and perfectly reliable.

On notera que par rapport au totalisateur décrit dans le document FR-A-2662001, il permet de regrouper sous forme d'une pièce unique les quatre pièces de l'art antérieur formées par le ressort 19, la rondelle 21, le disque 23 et l'arbre auxiliaire 22.It will be noted that, compared with the totalizer described in document FR-A-2662001, it makes it possible to group together in the form of a single piece the four pieces of the prior art formed by the spring 19, the washer 21, the disc 23 and the auxiliary shaft 22.

Bien entendu la présente invention n'est pas limitée au mode de réalisation particulier qui vient d'être décrit mais s'étend à toutes variantes conformes à son esprit.Of course the present invention is not limited to the particular embodiment which has just been described but extends to all variants in accordance with its spirit.

Par exemple, on peut prévoir de placer la lame ressort 100 en regard du tambour 200 d'ordre inférieur et non pas en regard du tambour 200 d'ordre supérieur.For example, provision can be made to place the leaf spring 100 facing the drum 200 of lower order and not facing the drum 200 of higher order.

On peut également prévoir sur la première face de chaque tambour 200 un nombre de dents d'indexage différent de deux.It is also possible to provide on the first face of each drum 200 with a number of indexing teeth other than two.

On notera enfin à l'examen de la figure 7, que chaque tambour est muni sur sa première face d'une structure 260 non symétrique de révolution . Celle-ci est destinée à coopérer avec une structure d'entraînement en entrée du totalisateur, par exemple une clavette ou un moyen équivalent lié à un pignon d'entrée. En variante, ce pignon d'entrée pourrait venir directement en prise avec les dents d'entraînement 210.Finally, it will be noted on examining FIG. 7, that each drum is provided on its first face with a structure 260 that is not symmetrical in revolution. This is intended to cooperate with a drive structure at the input of the totalizer, for example a key or an equivalent means linked to an input pinion. As a variant, this input pinion could come directly into engagement with the drive teeth 210.

Le cas échéant, la lame ressort 100 peut être réalisée en matière plastique et non pas en métal.If necessary, the leaf spring 100 can be made of plastic and not of metal.

Claims (10)

  1. A counter of known type with axially aligned rotary drums, comprising:
    . a frame (300) which houses:
    . a main shaft,
    . a plurality of axially aligned rotary drums (200) mounted on the main shaft, each of these drums being provided on its outside periphery with numerals and, on each face transverse to the main shaft, with drive teeth (210, 220, 222) and with indexing serrations (230, 232, 240),
    . a spring (100) exerting an axial force on the drums (200) so as to maintain in contact the indexing serrations (230, 232, 240) provided on the opposed faces of each pair of adjacent drums (200),
    . a secondary shaft parallel to the main shaft, and
    . a plurality of axially aligned rotary drive gears mounted on the secondary shaft respectively facing the drive teeth (210, 220, 222) of the drums so that after one complete revolution each drum drives the higher order drum via an associated gear,
       characterized by the fact that the spring (100) is formed by a blade engaged on the main shaft, at one end of the stack of drums (200), the blade being prevented from rotating about the axis of that main shaft on the frame (300), and being provided with indexing serrations (140) suitable for co-operating with the indexing serrations (240) connected to the opposed face of the adjacent end drum (200).
  2. A counter according to claim 1, characterized in that the blade spring (100) is made of metal.
  3. A counter according to either claim 1 or claim 2, characterized in that the blade spring (100) is made of phosphor bronze.
  4. A counter according to any of claims 1 to 3, characterized in that the blade spring (100) has a generally bent shape, is provided with a central hole (130) and has indexing serrations (140).
  5. A counter according to claim 4, characterized in that the blade spring (100) includes two indexing teeth (140).
  6. A counter according to either claim 4 or claim 5, characterized in that the hole (130) is oblong.
  7. A counter according to any of claims 4 to 6, characterized in that the ends (107, 108) of the blade spring (100) are bent inwardly in the opposite direction to the general curvature of the spring.
  8. A counter according to any of claims 1 to 7, characterized in that the frame (300) includes a wall (340) provided with at least one channel (343) with open converging sides which emerge at an edge of the wall via an engagement formation (344) and with two parallel ribs (360, 361), separated by a distance slightly greater than the width of the blade spring (100).
  9. A counter according to any of claims 1 to 8, characterized in that each drum (200) comprises on its first face a series of drive teeth (210) distributed around its axis, and on its second face two drive teeth (220, 222) connected by a circular rib (224) of lower height.
  10. A counter according to any of claims 1 to 9, characterized in that the number of indexing serrations (240) provided on one of the faces of the drums (200) is equal to a multiple of the number of numerals provided on the outside periphery of the drum.
EP92403516A 1991-12-23 1992-12-22 Totalizer with rotating coaxial drums Expired - Lifetime EP0549459B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9115988 1991-12-23
FR9115988A FR2685521B1 (en) 1991-12-23 1991-12-23 TOTALIZER WITH ROTATING COAXIAL DRUMS.

Publications (2)

Publication Number Publication Date
EP0549459A1 EP0549459A1 (en) 1993-06-30
EP0549459B1 true EP0549459B1 (en) 1997-09-10

Family

ID=9420370

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92403516A Expired - Lifetime EP0549459B1 (en) 1991-12-23 1992-12-22 Totalizer with rotating coaxial drums

Country Status (5)

Country Link
EP (1) EP0549459B1 (en)
DE (1) DE69222134T2 (en)
ES (1) ES2107516T3 (en)
FR (1) FR2685521B1 (en)
MX (1) MX9207514A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB750711A (en) * 1953-02-03 1956-06-20 Gen Motors Corp Improvements relating to spring clips for the mounting of rotatable shafts

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT220509Z2 (en) * 1990-05-11 1993-09-24 Veglia Borletti Srl ALIGNMENT DEVICE OF THE NUMBERS OF A ROTARY DRUM NUMBER.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB750711A (en) * 1953-02-03 1956-06-20 Gen Motors Corp Improvements relating to spring clips for the mounting of rotatable shafts

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
FR-A- 2 662 001 *
GB-A- 750 711 *

Also Published As

Publication number Publication date
EP0549459A1 (en) 1993-06-30
DE69222134T2 (en) 1998-02-12
FR2685521B1 (en) 1994-04-01
FR2685521A1 (en) 1993-06-25
MX9207514A (en) 1994-06-30
ES2107516T3 (en) 1997-12-01
DE69222134D1 (en) 1997-10-16

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