EP0013664A1 - Power indicator for an exercise cycle - Google Patents

Power indicator for an exercise cycle Download PDF

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Publication number
EP0013664A1
EP0013664A1 EP80810007A EP80810007A EP0013664A1 EP 0013664 A1 EP0013664 A1 EP 0013664A1 EP 80810007 A EP80810007 A EP 80810007A EP 80810007 A EP80810007 A EP 80810007A EP 0013664 A1 EP0013664 A1 EP 0013664A1
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EP
European Patent Office
Prior art keywords
drum
disc
rotation
shoe
speed
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EP80810007A
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German (de)
French (fr)
Inventor
Paul Terraillon
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Individual
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Individual
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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B21/00—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
    • A63B21/012—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using frictional force-resisters
    • A63B21/015—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using frictional force-resisters including rotating or oscillating elements rubbing against fixed elements
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B21/00—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
    • A63B21/40—Interfaces with the user related to strength training; Details thereof
    • A63B21/4041—Interfaces with the user related to strength training; Details thereof characterised by the movements of the interface
    • A63B21/4049—Rotational movement

Definitions

  • the present invention relates to a device indicating the power developed by the user on a crankset physical training apparatus.
  • Such a device looks like a bicycle balanced on the ground.
  • the crankset generally drives by gear a disc or a drum on which is disposed a brake shoe.
  • a brake shoe On which is disposed a brake shoe.
  • the usual devices are generally equipped with a device making it possible to indicate this braking force either on a dial graduated in kp, or on a dial indicating in% the corresponding slope.
  • some devices are equipped with a speed indicator corresponding to that of a real bike, this as a function of the speed of rotation of the drum actuated by the pedal.
  • the subject of the invention is a power indicator device for a crankset physical training apparatus, comprising a drum driven by the crankset and with which cooperates a brake shoe carried by a movable arm mounted to rotate freely around the axis of this drum, a spring being disposed between a point of this arm and a fixed point to act on this arm in the opposite direction to the force driving the shoe by the drum, and means making it possible to vary the braking force exerted by said brake shoe on the drum, the drum thus more or less strongly driving the brake shoe in the direction of its rotation, characterized in that said movable arm carries a disc driven in synchronism with the drum, in that a fixed caster in contact with the surface of the disc is rotated by the rotation of said disc, the speed of rotation of said caster varying on the one hand with the variation in position of said disc surface p ar compared to the wheel and on the other hand with the variation of the speed of rotation of said disc, and in that a transmission means transmits the rotation of said wheel to a t
  • FIG. 1 represents such a crankset physical training apparatus comprising such a power indicator device. It consists of a U-shaped frame 1, one end of which carries a saddle 2 and the other end of a handlebar 3. The whole is arranged on a support 4 keeping the apparatus in balance on the ground.
  • a crankset 5 actuates a drum 6 in the direction of the arrow indicated on which is mounted the brake shoe 7 movable in the direction of rotation of the drum 6.
  • a fixed caster 11 disposed on one of the two holding cheeks 12 is in contact with the disc 10 and thus rotates at a certain speed of rotation. This speed of rotation will be proportional to the power developed by the user of the device and it will be transmitted via a cable 14 to a tachometer 13 graduated in power units.
  • the handlebar 3 comprises a lever 15 making it possible to adjust by means of a cable 16 the braking force exerted by the brake shoe 7 on the drum 6.
  • the brake shoe 7 and its sole 17 in contact with the drum are arranged at the end of the arms 8 in such a way that a greater or lesser pressure can be obtained, therefore a greater or lesser braking force, exerted by said shoe 7 on the drum 6.
  • This is obtained by means of a stirrup 18, one fixed end of which is housed in the opening 19 of the arm 8 and the other movable end slides between two parts 20 fitted for this purpose in the other arm 8.
  • the stirrup 18 is held in the pressure position by means of a spring 21.
  • This spring 21 can be more or less tensioned using an appropriate device actuated by the lever 15, which thus makes it possible to select the braking force exerted by said shoe 7 on said drum 6.
  • the arms 8 connected at their ends by a bridge 22 are movable around the axis 9 of the crankset 5.
  • Figure 4 shows us an example of arrangement of the end of the arms 8 comprising the bridge 22 and the parts 26 for fixing the spring 23, the hole 19 and the parts 20 between which will slide one end of the stirrup 18 .
  • the drum 6 When the drum 6 begins to rotate, it drives the brake shoe 7 with it, until the latter will stabilize in a certain position. This is done as follows: the shoe 7 driven integrally by the drum 6, moves and tightens the spring 23 whose return force increases until the force is large enough to tear the shoe 7 from its integral connection . At this instant the shoe 7 stabilizes in a certain position while the drum 6 continues its rotation. Consequently, the variations in speed of the drum 6 no longer influence the position reached by the shoe.
  • said shoe 7 will stabilize at a position where the force with which the shoe is driven is equal to the restoring force of the spring 23, this driving force being independent of the speed of rotation of the drum 6, but proportional to the coefficient of friction of the sole 17 of the shoe 7 in contact with the drum 6 and of the braking force exerted by said shoe 7.
  • the coefficient of friction is a constant determined once and for all, it is concluded that the displacement of the shoe, that is to say the position of the shoe at a given instant, is directly proportional to the braking force applied by said shoe 7 to the drum 6.
  • Figure 2 shows the shoe in its extreme positions 7 and 7 ', depending on whether the braking force is minimum respectively maximum.
  • the power indicator device must take into account both the speed of rotation of the drum 6 and both the braking force. exerted by the shoe 7 on said drum 6, therefore of the displacement of said shoe 7.
  • a disc 10 rotating in synchronism with the drum 6 is fixed at the opposite end of one of the arms 8.
  • the axis 9 rotated by the crankset 5 transmits this rotation to the drum 6 by gear reduction by means of the wheels. 27 and 28.
  • the disc 10 is actuated by means of a belt 29 winding on the one hand in a groove 30 arranged around the drum 6 near the axis 9 and on the other hand around a second disc 31 integral with disc 10.
  • a caster 11 fixed to a cheek 12 is in contact with the disc 10 and rotates at a speed which depends on the one hand on the position of the disc 10 and on the other hand on the speed of rotation of said disc 10.
  • the variation in the speed of rotation of the caster 11 when the speed of rotation of the disc is constant corresponds to a variation in the position of the disc 10, therefore to a variation in the position of the shoe 7 and therefore to a variation in the force of braking applied.
  • the speed of rotation of the caster 11 is therefore proportional to the position of the disc 10 corresponding to the braking force applied to the drum 6 and to the speed of rotation of the disc 10 corresponding to the speed of rotation of the drum 6.
  • the speed of rotation of the caster thus corresponds to the power developed by a user of the device for turning the drum 6 braked by the shoe 7 using the pedal set 5.
  • This rotation of the caster 11 is transmitted to the tachometer 13 graduated in power units by means of a cable 14.
  • This device will indicate the instantaneous power with the precision necessary for such crankset physical training apparatus, this by an appropriate dimensioning of its essential elements, in particular the diameters of the disks 10, 11, 29 and the springs 23, 21 and by the choice the coefficient of friction of the sole 17 in contact with the drum 6.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biophysics (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Braking Arrangements (AREA)
  • Earth Drilling (AREA)

Abstract

The device is arranged on a physical training apparatus having a pedal crank gear about the axis thereof (9) actuating a drum (6) braked by a shoe (7). It comprises a disc (10) driven in synchronisation with the drum (6) and a roller (11) fixed in contact with the surface of said disc (10) and driven rotatingly by said rotary disc (10). The rotation speed of said roller (11) varies on one hand with the variation of the position of the disc (10), corresponding to a variation of the position of the shoe (7) held by the spring (23), and on the other hand with the variation of the rotation speed of the disc (10) corresponding to a variation of the rotation of the drum (6). The rotation of said roller (11) is transmitted by means of a cable (14) to a speedometer (13) gratuated in power units.

Description

La présente invention concerne un dispositif indiquant la puissance développée par l'utilisateur sur un appareil de culture physique à pédalier.The present invention relates to a device indicating the power developed by the user on a crankset physical training apparatus.

A ce jour il existe un certain nombre de ces appareils de culture physique à pédalier. Un tel appareil ressemble à un vélo posé en équilibre sur le sol. Le pédalier entraîne en général par démultiplication un disque ou un tambour sur lequel est disposé un sabot de frein. Suivant la force de freinage qu'exerce le sabot de frein sur le tambour il sera plus ou moins difficile d'entraîner ledit tambour à l'aide du pédalier. On simule ainsi par exemple la pente que devrait gravir un cycliste. Les appareils usuels sont en général équipés d'un dispositif permettant d'indiquer cette force de freinage soit sur un cadran gradué en kp, soit sur un cadran indiquant en % la pente correspondante. De même, certains appareils sont munis d'un indicateur de la vitesse correspondant à celle d'un vélo réel, ceci en fonction de la vitesse de rotation du tambour actionné par le pédalier.To date there are a number of these pedal-based physical training devices. Such a device looks like a bicycle balanced on the ground. The crankset generally drives by gear a disc or a drum on which is disposed a brake shoe. Depending on the braking force exerted by the brake shoe on the drum, it will be more or less difficult to drive said drum using the crankset. We simulate for example the slope that a cyclist should climb. The usual devices are generally equipped with a device making it possible to indicate this braking force either on a dial graduated in kp, or on a dial indicating in% the corresponding slope. Similarly, some devices are equipped with a speed indicator corresponding to that of a real bike, this as a function of the speed of rotation of the drum actuated by the pedal.

Mais aucun de ces appareils ne comporte d'indicateur de puissance instantanée. C'est un paramètre fonction à la fois de la vitesse de rotation du tambour et de la force exercée sur le pédalier par l'utilisateur, cette force étant directement liée à la force de freinage exercée par le sabot de frein sur le tambour. La présente invention vise à réaliser un tel indicateur de puissance.But none of these devices has any indi instant power generator. It is a parameter which is a function both of the speed of rotation of the drum and of the force exerted on the crankset by the user, this force being directly linked to the braking force exerted by the brake shoe on the drum. The present invention aims to achieve such a power indicator.

En effet l'invention a pour objet un dispositif indicateur de puissance pour un appareil de culture physique à pédalier, comprenant un tambour entraîné par le pédalier et avec lequel coopère un sabot de frein porté par un bras mobile monté pour tourner librement autour de l'axe de ce tambour, un ressort étant disposé entre un point de ce bras et un point fixe pour agir sur ce bras en sens inverse de la force d'entraînement du sabot par le tambour, et des moyens permettant de faire varier la force de freinage exercée par ledit sabot de frein sur le tambour, le tambour entraînant ainsi plus ou moins fortement le sabot de frein dans le sens de sa rotation, caractérisé en ce que ledit bras mobile porte un disque entraîné en synchronisme avec le tambour, en ce qu'une roulette fixe en contact avec la surface du disque est entraînée en rotation par la rotation dudit disque, la vitesse de rotation de ladite roulette variant d'une part avec la variation de position de ladite surface du disque par rapport à la roulette et d'autre part avec la variation de la vitesse de rotation dudit disque, et en ce qu'un moyen de transmission transmette la rotation de ladite roulette à un tachymètre gradué en unités de puissance.Indeed, the subject of the invention is a power indicator device for a crankset physical training apparatus, comprising a drum driven by the crankset and with which cooperates a brake shoe carried by a movable arm mounted to rotate freely around the axis of this drum, a spring being disposed between a point of this arm and a fixed point to act on this arm in the opposite direction to the force driving the shoe by the drum, and means making it possible to vary the braking force exerted by said brake shoe on the drum, the drum thus more or less strongly driving the brake shoe in the direction of its rotation, characterized in that said movable arm carries a disc driven in synchronism with the drum, in that a fixed caster in contact with the surface of the disc is rotated by the rotation of said disc, the speed of rotation of said caster varying on the one hand with the variation in position of said disc surface p ar compared to the wheel and on the other hand with the variation of the speed of rotation of said disc, and in that a transmission means transmits the rotation of said wheel to a tachometer graduated in power units.

Les figures suivantes données à titre d'exemples représentent une forme d'exécution du dispositif selon . l'invention.

  • La figure 1 est une vue générale d'un tel appareil de culture physique à pédalier avec un dispositif indicateur de puissance.
  • La figure 2 est une vue latérale partielle en coupe du dispositif.
  • La figure 3 est une vue en coupe selon 3-3 de la figure 2.
  • La figure 4 est une vue en perspective d'un pont rigide reliant les deux bras mobiles du dispositif.
The following figures given by way of examples represent an embodiment of the device according to. the invention.
  • Figure 1 is a general view of such a crankset physical training apparatus with a power indicator device.
  • Figure 2 is a partial side view in section of the device.
  • Figure 3 is a sectional view along 3-3 of Figure 2.
  • Figure 4 is a perspective view of a rigid bridge connecting the two movable arms of the device.

La figure 1 représente un tel appareil de culture physique à pédalier comportant un tel dispositif indicateur de puissance. Il se compose d'un cadre 1 en U dont une extrémité porte une selle 2 et l'autre extrémité un guidon 3. Le tout est agencé sur un support 4 maintenant l'appareil en équilibre sur le sol. Un pédalier 5 actionne un tambour 6 dans le sens de la flèche indiquée sur lequel est monté le sabot de frein 7 mobile dans le sens de rotation du tambour 6. Deux bras 8 mobiles autour de l'axe du pédalier 9, disposés de part et d'autre du tambour 6, supportent à leurs extrémités le sabot de frein 7. Un de ces bras se prolonge au-delà de l'axe 9 et comporte un disque 10 tournant toujours en synchronisme avec le tambour 6. Une roulette 11 fixe disposée sur l'une des deux joues de maintien 12 est en contact avec le disque 10 et tourne ainsi à une certaine vitesse de rotation. Cette vitesse de rotation sera proportionnelle à la puissance développée par l'utilisateur de l'appareil et elle sera transmise par l'intermédiaire d'un câble 14 à un tachymètre 13 gradué en unités de puissance. Notons encore que le guidon 3 comporte une manette 15 permettant de régler au moyen d'un câble 16 la force de freinage exercée par le sabot de frein 7 sur le tambour 6.FIG. 1 represents such a crankset physical training apparatus comprising such a power indicator device. It consists of a U-shaped frame 1, one end of which carries a saddle 2 and the other end of a handlebar 3. The whole is arranged on a support 4 keeping the apparatus in balance on the ground. A crankset 5 actuates a drum 6 in the direction of the arrow indicated on which is mounted the brake shoe 7 movable in the direction of rotation of the drum 6. Two arms 8 movable around the axis of the crankset 9, arranged on the side and on the other side of the drum 6, support the brake shoe at their ends 7. One of these arms extends beyond the axis 9 and comprises a disc 10 always rotating in synchronism with the drum 6. A fixed caster 11 disposed on one of the two holding cheeks 12 is in contact with the disc 10 and thus rotates at a certain speed of rotation. This speed of rotation will be proportional to the power developed by the user of the device and it will be transmitted via a cable 14 to a tachometer 13 graduated in power units. It should also be noted that the handlebar 3 comprises a lever 15 making it possible to adjust by means of a cable 16 the braking force exerted by the brake shoe 7 on the drum 6.

Pour mieux comprendre le mécanisme de fonctionnement du dispositif indicateur de puissance, référons- nous aux figures 2, 3 et 4.To better understand the operating mechanism of the power indicator device, refer to Figures 2, 3 and 4.

Le sabot de frein 7 et sa semelle 17 en contact avec le tambour, sont agencés à l'extrémité des bras 8 de telle manière que l'on peut obtenir une pression plus ou moins grande, donc une force de freinage plus ou moins grande, exercée par ledit sabot 7 sur le tambour 6. Ceci est obtenu au moyen d'un étrier 18 dont une extrémité fixe est logée dans l'ouverture 19 du bras 8 et l'autre extrémité mobile coulisse entre deux pièces 20 aménagées à cet effet dans l'autre bras 8. L'étrier 18 est maintenu en position de pression à l'aide d'un ressort 21. Ce ressort 21 peut être plus ou moins tendu à l'aide d'un dispositif approprié actionné par la manette 15, laquelle permet ainsi de sélectionner la force de freinage exercée par ledit sabot 7 sur ledit tambour 6.The brake shoe 7 and its sole 17 in contact with the drum, are arranged at the end of the arms 8 in such a way that a greater or lesser pressure can be obtained, therefore a greater or lesser braking force, exerted by said shoe 7 on the drum 6. This is obtained by means of a stirrup 18, one fixed end of which is housed in the opening 19 of the arm 8 and the other movable end slides between two parts 20 fitted for this purpose in the other arm 8. The stirrup 18 is held in the pressure position by means of a spring 21. This spring 21 can be more or less tensioned using an appropriate device actuated by the lever 15, which thus makes it possible to select the braking force exerted by said shoe 7 on said drum 6.

Comme nous l'avons vu, les bras 8 reliés à leurs extrémités par un pont 22 sont mobiles autour de l'axe 9 du pédalier 5. Un ressort 23, dont l'extrémité mobile 25 est liée au bras 8 et dont l'extrémité fixe 24 peut être liée aux joues 12, permet de limiter le mouvement du sabot 7 solidaire des bras 8.As we have seen, the arms 8 connected at their ends by a bridge 22 are movable around the axis 9 of the crankset 5. A spring 23, whose movable end 25 is linked to the arm 8 and whose end fixed 24 can be linked to the cheeks 12, makes it possible to limit the movement of the shoe 7 secured to the arms 8.

La figure 4 nous montre un exemple d'agencement de l'extrémité des bras 8 comprenant le pont 22 et les parties 26 permettant de fixer le ressort 23, le trou 19 et les pièces 20 entre lesquels va coulisser une extrémité de l'étrier 18.Figure 4 shows us an example of arrangement of the end of the arms 8 comprising the bridge 22 and the parts 26 for fixing the spring 23, the hole 19 and the parts 20 between which will slide one end of the stirrup 18 .

Lorsque le tambour 6 commence à tourner il entraîne avec lui le sabot de frein 7, jusqu'au moment où ce dernier va se stabiliser dans une certaine position. Ceci se fait de la manière suivante: le sabot 7 entraîné solidairement par le tambour 6, se déplace et tend le ressort 23 dont la force de rappel augmente jusqu'au moment où cette force est assez grande pour arracher le sabot 7 de sa liaison solidaire. A cet instant le sabot 7 se stabilise dans une certaine position tandis que le tambour 6 poursuit sa rotation. Dès lors les variations de vitesse du tambour 6 n'influencent plus la position atteinte par le sabot. Ainsi ledit sabot 7 va se stabiliser à une position où la force avec laquelle le sabot est entraîné est égale à la force de rappel du ressort 23, cette force d'entraînement étant indépendante de la vitesse de rotation du tambour 6, mais proportionnelle au coefficient de frottement de la semelle 17 du sabot 7 en contact avec le tambour 6 et de la force de freinage exercée par ledit sabot 7. Comme le coefficient de frottement est une constante déterminée une fois pour toutes, on en conclut que le déplacement du sabot, c'est-à-dire la position du sabot à un instant donné, est directement proportionnel à la force de freinage appliquée par ledit sabot 7 au tambour 6. La figure 2 représente le sabot dans ses positions extrêmes 7 et 7', suivant que la force de freinage est minimale respectivement maximale.When the drum 6 begins to rotate, it drives the brake shoe 7 with it, until the latter will stabilize in a certain position. This is done as follows: the shoe 7 driven integrally by the drum 6, moves and tightens the spring 23 whose return force increases until the force is large enough to tear the shoe 7 from its integral connection . At this instant the shoe 7 stabilizes in a certain position while the drum 6 continues its rotation. Consequently, the variations in speed of the drum 6 no longer influence the position reached by the shoe. Thus said shoe 7 will stabilize at a position where the force with which the shoe is driven is equal to the restoring force of the spring 23, this driving force being independent of the speed of rotation of the drum 6, but proportional to the coefficient of friction of the sole 17 of the shoe 7 in contact with the drum 6 and of the braking force exerted by said shoe 7. As the coefficient of friction is a constant determined once and for all, it is concluded that the displacement of the shoe, that is to say the position of the shoe at a given instant, is directly proportional to the braking force applied by said shoe 7 to the drum 6. Figure 2 shows the shoe in its extreme positions 7 and 7 ', depending on whether the braking force is minimum respectively maximum.

La puissance étant le produit d'une vitesse par la force nécessaire à obtenir cette vitesse, le dispositif indicateur de puissance selon l'invention devra tenir compte à la fois de la vitesse de rotation du tambour 6 et à la fois de la force de freinage exercée par le sabot 7 sur ledit tambour 6, donc du déplacement dudit sabot 7.The power being the product of a speed by the force necessary to obtain this speed, the power indicator device according to the invention must take into account both the speed of rotation of the drum 6 and both the braking force. exerted by the shoe 7 on said drum 6, therefore of the displacement of said shoe 7.

Pour ce faire on fixe à l'extrémité opposée d'un des bras 8 un disque 10 tournant en synchronisme avec le tambour 6. L'axe 9 mis en rotation par le pédalier 5 transmet cette rotation au tambour 6 par démultiplication au moyen des roues 27 et 28. Le disque 10 est actionné par l'intermédiaire d'une courroie 29 s'enroulant d'une part dans une gorge 30 disposée autour du tambour 6 près de l'axe 9 et d'autre part autour d'un deuxième disque 31 solidaire du disque 10.To do this, a disc 10 rotating in synchronism with the drum 6 is fixed at the opposite end of one of the arms 8. The axis 9 rotated by the crankset 5 transmits this rotation to the drum 6 by gear reduction by means of the wheels. 27 and 28. The disc 10 is actuated by means of a belt 29 winding on the one hand in a groove 30 arranged around the drum 6 near the axis 9 and on the other hand around a second disc 31 integral with disc 10.

On constate immédiatement que le disque 10 en rotation se déplace comme le sabot 7, entre deux positions extrêmes'10 et 10', comme le représente la figure 2.We can immediately see that the rotating disc 10 moves like shoe 7, between two extreme positions '10 and 10', as shown in Figure 2.

Une roulette 11 fixée à une joue 12 est en contact avec le disque 10 et tourne à une.vitesse fonction d'une part de la position du disque 10 et d'autre part de la vitesse de rotation dudit disque 10.A caster 11 fixed to a cheek 12 is in contact with the disc 10 and rotates at a speed which depends on the one hand on the position of the disc 10 and on the other hand on the speed of rotation of said disc 10.

Supposons la vitesse de rotation du disque 10 constante. On voit alors que la roulette 11 tournera lentement si le disque est en position initiale 10 comme indiqué à la figure 2. Si maintenant on augmente la force de freinage exercée par le sabot 7, le disque 10 va se déplacer en 10' et la roulette 11 va être en contact avec la périphérie dudit disque et ainsi tourner à une vitesse accrue, dans notre exemple maximale.Suppose the speed of rotation of the disk 10 is constant. We then see that the caster 11 will turn slowly if the disc is in the initial position 10 as shown in Figure 2. If now we increase the braking force exerted by the shoe 7, the disc 10 will move in 10 'and the roller 11 will be in contact with the periphery of said disc and thus rotate at an increased speed, in our maximum example.

Ainsi la variation de la vitesse de rotation de la roulette 11 lorsque la vitesse de rotation du disque est constante, correspond à une variation de position du disque 10, donc à une variation de position du sabot 7 et donc à une variation de la force de freinage appliquée.Thus the variation in the speed of rotation of the caster 11 when the speed of rotation of the disc is constant, corresponds to a variation in the position of the disc 10, therefore to a variation in the position of the shoe 7 and therefore to a variation in the force of braking applied.

Maintenant si la vitesse de rotation du tambour 6 varie, n'influençant plus la position du sabot 7, cette variation de vitesse sera transmise au disque 10, et de là directement à la roulette 11 en contact sur la surface dudit disque.10.Now if the speed of rotation of the drum 6 varies, no longer influencing the position of the shoe 7, this variation in speed will be transmitted to the disc 10, and from there directly to the roller 11 in contact with the surface of said disc. 10.

La vitesse de rotation de la roulette 11 est donc proportionnelle à la position du disque 10 correspondant à la force de freinage appliquée sur le tambour 6 et à la vitesse de rotation du disque 10 correspondant à la vitesse de rotation du tambour 6.The speed of rotation of the caster 11 is therefore proportional to the position of the disc 10 corresponding to the braking force applied to the drum 6 and to the speed of rotation of the disc 10 corresponding to the speed of rotation of the drum 6.

La vitesse de rotation de la roulette correspond ainsi à la puissance développée par un utilisateur de l'appareil pour faire tourner à l'aide du pédalier 5 le tambour 6 freiné par le sabot 7.The speed of rotation of the caster thus corresponds to the power developed by a user of the device for turning the drum 6 braked by the shoe 7 using the pedal set 5.

Cette rotation de la roulette 11 est transmise au tachymètre 13 gradué en unités de puissance au moyen d'un câble 14.This rotation of the caster 11 is transmitted to the tachometer 13 graduated in power units by means of a cable 14.

Ce dispositif indiquera la puissance instantanée avec la précision nécessaire pour de tels appareils de culture physique à pédalier, ceci par un dimensionnement approprié de ses éléments essentiels, notamment les diamètres des disques 10, 11, 29 et des ressorts 23, 21 et par le choix du coefficient de frottement de la semelle 17 en contact avec le tambour 6.This device will indicate the instantaneous power with the precision necessary for such crankset physical training apparatus, this by an appropriate dimensioning of its essential elements, in particular the diameters of the disks 10, 11, 29 and the springs 23, 21 and by the choice the coefficient of friction of the sole 17 in contact with the drum 6.

Claims (1)

Dispositif indicateur de puissance instantanée pour un appareil de culture physique à pédalier, comprenant un tambour (6) entraîné par un pédalier (5), un sabot de frein (7) coopérant avec ledit tambour et porté par un bras mobile (8) monté pour tourner librement autour de l'axe (9) de ce tambour, un ressort (23) étant disposé entre un point (25) de ce bras et un point fixe (24) pour agir sur ce bras en sens inverse de la force d'entraînement dudit sabot par ledit tambour,
et des moyens (15) permettant de faire varier la force de freinage exercée par ledit sabot sur ledit tambour, le tambour entraînant ainsi plus ou moins fortement le sabot de frein dans le sens de rotation,
caractérisé en ce que ledit bras mobile (8) porte un disque (10) entraîné en synchronisme avec ledit tambour, en ce qu'une roulette fixe (11) en contact avec la surface dudit disque est entraînée en rotation par la rotation dudit disque, la vitesse de rotation de ladite roulette variant d'une part avec la variation de position de la surface dudit disque par rapport à ladite roulette et d'autre part avec la variation de la vitesse de rotation dudit disque, et en ce qu'un moyen de transmission (14) transmette la rotation de ladite roulette à un tachymètre (13) gradué en unités de puissance. Instant power indicator device for a pedal-based physical training apparatus, comprising a drum (6) driven by a pedal (5), a brake shoe (7) cooperating with said drum and carried by a movable arm (8) mounted to rotate freely around the axis (9) of this drum, a spring (23) being disposed between a point (25) of this arm and a fixed point (24) for acting on this arm in the opposite direction to the force driving said shoe by said drum,
and means (15) making it possible to vary the braking force exerted by said shoe on said drum, the drum thus more or less strongly driving the brake shoe in the direction of rotation,
characterized in that said movable arm (8) carries a disc (10) driven in synchronism with said drum, in that a fixed caster (11) in contact with the surface of said disc is rotated by the rotation of said disc, the speed of rotation of said caster varying on the one hand with the variation in position of the surface of said disc relative to said caster and on the other hand with the variation of the speed of rotation of said disc, and in that a means transmission (14) transmits the rotation of said caster to a tachometer (13) graduated in power units.
EP80810007A 1979-01-12 1980-01-09 Power indicator for an exercise cycle Withdrawn EP0013664A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH335/79 1979-01-12
CH33579 1979-01-12

Publications (1)

Publication Number Publication Date
EP0013664A1 true EP0013664A1 (en) 1980-07-23

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ID=4184668

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Application Number Title Priority Date Filing Date
EP80810007A Withdrawn EP0013664A1 (en) 1979-01-12 1980-01-09 Power indicator for an exercise cycle

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EP (1) EP0013664A1 (en)
ES (1) ES487640A1 (en)
WO (1) WO1980001452A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0058718A1 (en) * 1980-08-29 1982-09-01 Medicor Muevek Charging apparatus for physiological tests.
US4625551A (en) * 1984-06-28 1986-12-02 Teodoro Carnielli Device for detecting the developed power in home pedalling apparatus for bicycles
US4713567A (en) * 1985-10-02 1987-12-15 Fichtel & Sachs Ag Electromagnetic brake device for a sports training apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4917377A (en) * 1989-06-28 1990-04-17 Chen Chih S Exercise bicycle

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3192772A (en) * 1961-10-25 1965-07-06 Peter H Tarter Work-calibrated exercising apparatus
FR2160230A5 (en) * 1971-11-11 1973-06-22 Monark Crescent Ab
DE2252491A1 (en) * 1972-10-26 1974-05-02 Georg Nietsch BICYCLE ERGOMETER
FR2218561A1 (en) * 1973-02-21 1974-09-13 Sorlin Roger
DE2525739A1 (en) * 1975-06-10 1976-12-23 Resch Fa Willi Treadle ergometer with Prony brake flywheel - has centrifugal governor interacting over transmission rods to preset flywheel brake

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3192772A (en) * 1961-10-25 1965-07-06 Peter H Tarter Work-calibrated exercising apparatus
FR2160230A5 (en) * 1971-11-11 1973-06-22 Monark Crescent Ab
DE2252491A1 (en) * 1972-10-26 1974-05-02 Georg Nietsch BICYCLE ERGOMETER
FR2218561A1 (en) * 1973-02-21 1974-09-13 Sorlin Roger
DE2525739A1 (en) * 1975-06-10 1976-12-23 Resch Fa Willi Treadle ergometer with Prony brake flywheel - has centrifugal governor interacting over transmission rods to preset flywheel brake

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0058718A1 (en) * 1980-08-29 1982-09-01 Medicor Muevek Charging apparatus for physiological tests.
EP0058718A4 (en) * 1980-08-29 1984-02-09 Medicor Muevek Charging apparatus for physiological tests.
US4625551A (en) * 1984-06-28 1986-12-02 Teodoro Carnielli Device for detecting the developed power in home pedalling apparatus for bicycles
US4713567A (en) * 1985-10-02 1987-12-15 Fichtel & Sachs Ag Electromagnetic brake device for a sports training apparatus

Also Published As

Publication number Publication date
ES487640A1 (en) 1980-08-01
WO1980001452A1 (en) 1980-07-24

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