FR2636588A1 - Cycle with electric traction - Google Patents

Abstract

The technical field of the invention is the electronic motorisation of a cycle, constituting a substantial aid to pedalling. The system proposed includes two motors mounted in opposition, symmetrically, and acting on one same central roller. All this assembly is driven and regulated by the electronic varier.

Description

 The present invention relates to an electric tractor device for cycle or tricycle constituted by two electric motors with permanent magnets mounted in opposition and attacking the same central roller.

 These two motors enclosed in a wecano-welding assembly constituting the support to be fixed on the cycle tone boom allow, by putting their windings in series or in parallel, the selection of speeds from the constant tension provided by a battery.

 The technical field of the invention is the electronic motorization of a cycle, constituting a sensitive aid for pedaling.

The bicycle is distributed all over the world, and the fork devices are now, in fact, standardized, which allows the addition of electronic traction equipment.

Who has not dreamed of a bicycle that walks by itself, in the greatest silence, and which nevertheless remains a bicycle (not a cyclist)?
SOLEX has made people happy with the 2-stroke engine, but it is still very noisy, and you have to mix it up, get your hands and clothes dirty, and clean up ten times!
A few years ago, it was not yet possible to make a compact, simple, clean (acid-free) and lightweight ELECTRONIC device, & n affordable price.

 The wound rotor motors were heavy, and their performance was poor for small powers.

The most economical lead-acid batteries feared repeated deep discharges, and risked spreading their acid in case the bicycle fell to the ground what happened!
There are now small reliable permanent magnet motors with excellent performance, even for small powers.

 I1oud today lead acid batteries, and NIKEL FER, waterproof, and capable of undergoing repetitive cycling without quickly losing their capacity.

 The Americans have put on the market interesting roller devices, to be mounted on the front fork of to'utvélo.

 These devices use an offset motor on the side, and start directly under full tension, which is brutal and leads to premature wear of the tire.

 The proposed system comprises two motors (1) mounted in opposition, symmetrically, and attacking the same central valet (2). Start-up is carried out by supplying the two motors in series, ie at nominal mid-voltage. A noussoir button activating a relay or a new electronic device "speed controller, which allows to be progressive and more flexible; in this case, the motors are then supplied at full voltage and thus giving their maximum torque, which does not does not exist to this day. As soon as the pressure on the push cursor is released, in the case of 1A first version, the motors are again switched in series, and if the speed is sufficient, become generators to recharge the battery, while causing slight braking, this harms runaway racing downhill without using the brake pads. You can at any time accompany the engines with a light pedal stroke, and the ascent of the ribs is effortless, the electrical device providing most of the necessary energy With the variator, the pedal stroke is eliminated, thanks to two regulators which allow to keep the same tension on a slope.

 The complete set, with the battery, to mount on any bicycle.

weighs no more than ten kilos, and its irise in place does not require more than a morning of intervention without specialist.

 The two motors (1) and the central roller (2) are enclosed in a mechanical welding assembly (3) constituting the support to be fixed on the front fork of the bicycle. Relays, or electronic power circuits (g) are fixed under the support (3), while the battery (5) rests on it in the case of a cycle, and at the central rear in the case of a tricycle.

Another advantage of this electronic variator in the case of tri-circle for disabled person: no longer get off the tricycle for manoen-
vrer thanks to its reverse gear, which allows easy reversing if the need is and to allow perfect regulation, the principle is started
on 24 volt batteries.

Claims (6)

 1) Compact device, motors, battery and control devices  (1) (5) (4) adaptable to the front fork of any bicycle by means of a single Vi6 and two cable stays adjustable in length and fixed at the axis (6) (7! Of the wheel, ensuring stability.  2) Device according to claim 1 characterized in that two permanent magnet motors (1) are mounted symmetrically in opposition on either side of the same central roller (2) that they drive.  3) Device according to claim 1 and claim 2 characterized in that the two motors are enclosed in a light support (3) constituting support and alignment, with a cutout for bearing of the tire on the roller (2).  4) Device according to claims 1, 2, ct 3, characterized in that the electrical or electronic power control members are  (4) fixed on the motor support, right next to the motors.  5) Device according to claims6 1, 2, o, and 4, characterized in that the battery is fixed on the support part of the motors (1) (o) and is thus suspended on the tire by the roller, contributing (2 ) by its weight to its grip in the case of the tricycle at the rear center.  6! Device setrr any one of the preceding claims, characterized in that the windings of the two motors (1) can be switched in series and in parallel, on the battery, allowing the selection of R @ C operating speeds from a same tension.