FR2689593A1 - Hydraulic drive system with variable rotary speed - includes two pumps drive and driven connected by two sets of piping and bypass valve placed between two pipes - Google Patents

Hydraulic drive system with variable rotary speed - includes two pumps drive and driven connected by two sets of piping and bypass valve placed between two pipes Download PDF

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Publication number
FR2689593A1
FR2689593A1 FR9015189A FR9015189A FR2689593A1 FR 2689593 A1 FR2689593 A1 FR 2689593A1 FR 9015189 A FR9015189 A FR 9015189A FR 9015189 A FR9015189 A FR 9015189A FR 2689593 A1 FR2689593 A1 FR 2689593A1
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France
Prior art keywords
drive
bypass valve
piping
pipes
sets
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.)
Withdrawn
Application number
FR9015189A
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French (fr)
Inventor
Richard Philippe Albert
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Priority to FR9015189A priority Critical patent/FR2689593A1/en
Publication of FR2689593A1 publication Critical patent/FR2689593A1/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H39/00—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution
    • F16H39/04—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution with liquid motor and pump combined in one unit
    • F16H39/06—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution with liquid motor and pump combined in one unit pump and motor being of the same type
    • F16H39/26—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution with liquid motor and pump combined in one unit pump and motor being of the same type with liquid chambers not shaped as bodies of revolution or shaped as bodies of revolution eccentric to the main axis of the gearing
    • F16H39/30—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution with liquid motor and pump combined in one unit pump and motor being of the same type with liquid chambers not shaped as bodies of revolution or shaped as bodies of revolution eccentric to the main axis of the gearing with liquid chambers formed in stationary members
    • F16H39/32—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution with liquid motor and pump combined in one unit pump and motor being of the same type with liquid chambers not shaped as bodies of revolution or shaped as bodies of revolution eccentric to the main axis of the gearing with liquid chambers formed in stationary members with sliding vanes carried by the rotor

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Rotary Pumps (AREA)

Abstract

The hydraulic system consists of two pumps (2,5), drive and driven, connected by two sets of piping (3a,3b) and a bypass valve (6) placed between the two pipes. A rotary motion applied to the rotor of the pump (2) is transmitted by fluid flow to the rotor of the second pump (5). The bypass valve (6) allows a bleed off of the flow to produce a modification in the relation of speeds between the drive and driven shaft. Use/Advantage - As a hydraulic drive system replacing the conventional chain drive in bicycles fitted with a gear change that can give a variable ratio between the drive and driven shafts.

Description

Système hydraulique d'entrainement du mouvement de rotation et de variation du rapport des vitesses de rotation entre deux axes. Hydraulic system for driving the rotational movement and varying the ratio of rotational speeds between two axes.

La présente invention concerne un moyen de transmission du mouvement de rotation entre deux axes, ainsi que la possibilité de modifier le rapport des vitesses de rotation des axes. The present invention relates to a means of transmitting the rotational movement between two axes, as well as the possibility of modifying the ratio of the rotational speeds of the axes.

Généralement la transmission du mouvement de rotation entre deux axes est obtenue en équipant chaque axe de roues dentées ou de poulies, et en reliant ces éléments par l'intermédiaire d'une troisième roue, d'une chalne ou d'une courroie. Generally the transmission of the rotational movement between two axes is obtained by equipping each axis with toothed wheels or pulleys, and by connecting these elements by means of a third wheel, a chalne or a belt.

La figure 1 représente deux roues dentées reliées par une channe. Figure 1 shows two gears connected by a chain.

Dans ce cas un tour de la roue (2) entraine K tour de la roue (5). La valeur K est constante, elle est fonction du rapport de la circonférence de (2) sur la circonférence de (5). In this case one revolution of the wheel (2) causes K revolution of the wheel (5). The value K is constant, it is a function of the ratio of the circumference of (2) to the circumference of (5).

La vitesse de rotation de l'axe (4) est reliée par K a celle de l'axe (1). Cependant il faut parfois faire varier la vitesse de rotation d'un ou des deux axes. Ceci est obtenu en modifiant la valeur de K. The speed of rotation of the axis (4) is connected by K to that of the axis (1). However, it is sometimes necessary to vary the speed of rotation of one or both axes. This is achieved by changing the value of K.

Dans ce cas le diamètre de l'une ou de l'autre roue est changé. Cette opération s'effectue aprés arrêt du mouvement de rotation. In this case the diameter of one or the other wheel is changed. This operation is carried out after stopping the rotational movement.

Certains systèmes, tel que le dérailleur et un jeu de pignons aux diamètres différents employés sur les bicyclettes, permettent le changement de K sans interruption de la rotation. Certain systems, such as the derailleur and a set of pinions with different diameters used on bicycles, allow the change of K without interrupting the rotation.

On se propose de remplacer l'ensemble des éléments qui permettent la transmission du mouvement de rotation et la variation des vitesses relatives de rotation par un système hydraulique. It is proposed to replace all the elements which allow the transmission of the rotational movement and the variation of the relative rotational speeds by a hydraulic system.

Ce système est constitué de quatre parties - une pompe dont le rotor est solidaire de l'axe d'entrainement. This system consists of four parts - a pump, the rotor of which is integral with the drive axis.

- une deuxième pompe de principe identique à la première dont le rotor est solidaire de l'axe entrainé.- A second pump identical in principle to the first, the rotor of which is integral with the driven axis.

- deux conduits qui relient les pompes entre elles.- two conduits which connect the pumps to each other.

- une vanne qui relie les deux conduits entre eux. - a valve which connects the two conduits together.

Le système est étanche et rempli par un fluide pressurisé. The system is sealed and filled with pressurized fluid.

Les pompes utilisées sont de type volumétrique à galets, à palettes, à engrenages ou à vis. The pumps used are of the volumetric type with rollers, vane, gear or screw.

La figure 1 représente une transmission classique. Figure 1 shows a conventional transmission.

(1) axe d'entrainement.(1) training axis.

(2) roue dentée solidaire de (1).(2) toothed wheel integral with (1).

(3) channe de transmission.(3) changes transmission.

(4) axe entrainé.(4) driven axis.

(5) roue dentée solidaire de (4).(5) toothed wheel secured to (4).

La figure 2 représente l'ensemble hydraulique. Figure 2 shows the hydraulic assembly.

(1) axe d'entrainement solidaire au rotor de la pompe (2).(1) drive shaft integral with the pump rotor (2).

(2) pompe d'entrainement : émetteur.(2) drive pump: transmitter.

(3a) et (3b) conduits de circulation du fluide.(3a) and (3b) fluid circulation conduits.

(4) axe entrainé solidaire au rotor de la pompe (5).(4) driven axis integral with the pump rotor (5).

(5) pompe entrainée : récepteur.(5) driven pump: receiver.

(6) vanne by-pass.(6) bypass valve.

La mise en rotation de l'axe (1) entraine, grâce a l'émet- teur (2), la circulation du fluide dans le système. The rotation of the axis (1) causes, thanks to the emitter (2), the circulation of the fluid in the system.

Arrivé dans le récepteur (5), grâce au conduit (3a),le fluide met en rotation l'axe (4). Ensuite le fluide est recyclé vers l'émetteur par le conduit (3b). Arrived in the receiver (5), thanks to the conduit (3a), the fluid rotates the axis (4). Then the fluid is recycled to the emitter through the conduit (3b).

La vanne (6) permet de modifier le débit du fluide vers le récepteur, on obtient ainsi une variation de la constante K. The valve (6) makes it possible to modify the flow rate of the fluid towards the receiver, a variation of the constant K is thus obtained.

En équipant les deux axes de détecteurs de rotation et/ou de capteurs de moment il est possible de lier entre elles les vitesses de rotation et/ou les forces à mettre en oeuvre sur chaque axe. By equipping the two axes with rotation detectors and / or moment sensors it is possible to link the rotation speeds and / or the forces to be used on each axis to each other.

Un tel système est adapté pour la propulsion d'une bicyclette.  Such a system is suitable for propelling a bicycle.

Claims (5)

REVENDICATIONS 1) Système d'entrainement du mouvement de rotation et de variation des vitesses de rotation entre deux axes caractérisé en ce que la transmission du mouvement et la variation des vitesses sont hydrauliques. 1) System for driving the rotational movement and for varying the rotational speeds between two axes, characterized in that the transmission of the movement and the variation in the speeds are hydraulic. 2) Système selon la revandication 1 caractérisé en ce que les mouvements de rotation de chaque axe sont émis ou reçus par des pompes volumétriques. 2) System according to revandication 1 characterized in that the rotational movements of each axis are transmitted or received by positive displacement pumps. 3) Système selon les revendications 1 et 2 caractérisé en ce quela transmission du mouvement se fait par un fluide. 3) System according to claims 1 and 2 characterized in that the transmission of movement is by a fluid. 4) Système selon la revendication 1 caractérisé en ce que la variation des vitesses se fait par une vanne. 4) System according to claim 1 characterized in that the speed variation is done by a valve. 5) Système selon les revendications 1 et 4 caractérisé en ce que la commande d'ouverture ou de fermeture de la vanne peut être fonction de paramètres provenant des axes.  5) System according to claims 1 and 4 characterized in that the opening or closing control of the valve can be a function of parameters from the axes.
FR9015189A 1990-12-03 1990-12-03 Hydraulic drive system with variable rotary speed - includes two pumps drive and driven connected by two sets of piping and bypass valve placed between two pipes Withdrawn FR2689593A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9015189A FR2689593A1 (en) 1990-12-03 1990-12-03 Hydraulic drive system with variable rotary speed - includes two pumps drive and driven connected by two sets of piping and bypass valve placed between two pipes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9015189A FR2689593A1 (en) 1990-12-03 1990-12-03 Hydraulic drive system with variable rotary speed - includes two pumps drive and driven connected by two sets of piping and bypass valve placed between two pipes

Publications (1)

Publication Number Publication Date
FR2689593A1 true FR2689593A1 (en) 1993-10-08

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FR9015189A Withdrawn FR2689593A1 (en) 1990-12-03 1990-12-03 Hydraulic drive system with variable rotary speed - includes two pumps drive and driven connected by two sets of piping and bypass valve placed between two pipes

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FR (1) FR2689593A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR939917A (en) * 1947-01-24 1948-11-29 Hydraulic transmission for bicycles and pedal vehicles
GB2102747A (en) * 1981-05-29 1983-02-09 Harold William Lamberth Hydraulic transmission for bicycle

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR939917A (en) * 1947-01-24 1948-11-29 Hydraulic transmission for bicycles and pedal vehicles
GB2102747A (en) * 1981-05-29 1983-02-09 Harold William Lamberth Hydraulic transmission for bicycle

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