FR2777855A1 - Ratchet and rack for transforming cycle handlebar alternating linear movement into continuous rotary movement - Google Patents

Abstract

The alternating linear movement of the handlebar is transformed into a continuous rotary movement by a ratchet (12) and two parallel racks (19,8). The oscillating propelling force of the handlebar (2) is transformed and transmitted to a transmission shaft (13) driving the front wheel.

Description

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  The present invention relates to a device for trans-

  form an alternating-linear movement (even when the li-

  born in question operates a turning movement, the designation

  tion can then be: alternative-linear-rotating) in motion-

  continuously rotating, without the inconvenience of neutral

  known in the crank connecting rod system, a device that integrates us

  particularly in the development of a two-person bike

  drive wheels, but which can be used for any sports vehicle

tif or not.

  I0 My previous patent applications for a two-wheel drive bicycle described heavy and cumbersome modes of transmission, in particular by the use, for the transmission between the oscillating handlebars and the front wheel, of two freewheels toothed driving a shaft transmission and two chains attached to the handlebars to drive said freewheels.

  The device according to the present invention remedies these in-

conveniences.

  Indeed, it has as its primary characteristic the use

  lization of a ratchet driving a transmission shaft, inserted

  d between two parallel racks, opposite direction, soli-

  each other at their ends, being able to

  deviate slightly from the ratchet while being retained by

  spells, and held in place and direction by lugs on which it slides, guided by edges on the ratchet,

  so that whatever movement is happening to the creatures

  lengthwise, these rotate the

roc-het in the same direction.

  Applied to the drive of the front wheel of a bicycle by a swinging handlebar, the specific modes of application are as follows: - the double rack system can be connected at one end to one end of the handlebar by a rod

  rigid metal articulated at the point of attachment with the handlebars.

  3S - the double rack system is placed horizontally (in the rest position) around the driving ratchet and connected at its ends to the handlebars by rigid metal rods, the

  connection between these rods and the double rack system is made

  sant by lugs that can slide perpendicularly 3 length. the double rack system can be connected in the middle to the handlebars, by a rigid metal piece integral with the handlebars, making a fork above the upper rack, which it activates by means of pins hinged in orifices

  studied for this purpose, orifices located on either side of the back and forth

  comes on metal parts fixed to the upper rack

  better. - the double rack system connected in the middle to the handlebars can be held at its ends by springs

  connecting them to the metal rod integral with the handlebars.

  - the double rack system can be connected

  rigid handlebar, in which case its racks must be bent so as to follow the movement of the

  metal parts connecting it to the handlebars.

  o - the racks can be of adjustable curvature so that they can be adapted to different heights of the handlebars. - the ratchet gear can be doubled, one being more

  smaller than the other, to take into account the difference in driving

  2.5 due to the fact that the bottom rack causes more than

  the upper one and in this case the racks should be light

  rement offset to be in front of their respective ratchets.

  - pawls can replace the gears of the ro-

  chet, in which case the racks are fixed to each other without

play neither springs nor pins.

  - pawls can replace the teeth of the cre-

  meshes, in which case the racks are fixed to each other

without play, springs or pins.

  The accompanying drawings illustrate the invention: FIG. 1 represents, seen from the front, the device according to the

  main description, and a configuration of attachment to the handlebars.

  FIG. 2 represents, seen in side section, the ratchet and

and the rack system.

  Figure 3 shows, in side view section, the ratchet on its tree. With reference to these drawings, the operation of the device can be described as follows:

  When the user pulls on part 1 of the handlebar 2 pivo-

  both on its axis 3, all of the racks connected to the handlebars 2

  Io by the rod 5 mounted on the axis 6 is pulled upwards, the cre-

  mesh 8 located at the bottom, articulated on the pins 9 and 10 on which it slides, guided by the edges 4 of the ratchet 12, held in contact with the gear 11 of the ratchet 12 by the

  springs 14 and 15, drives the said gear 11 and therefore the

  chet 12 and its shaft 13 counterclockwise. Simultaneously, the rack 19 located at the top,

  deviating slightly from the gear 11 slides on the said gear

swings 1 1 of the ratchet 12.

  At the end of the stroke, the user pulls on part 20 of the guide

  2o don 2 and the rack assembly double goes in the other direction. The rack 19 will catch the gear 1 1 of the ratchet 12, driving the shaft 13 counterclockwise, while the rack 8 will slide on

the gear 1 1.

259 And so on ...

  The device according to the invention is generally intended for the transformation of a reciprocating-linear, and even reciprocating linear-rotating movement, into a continuous rotary movement,

  and is more particularly intended to participate in the transmission-

  3rd movement of an oscillating handlebar when driving the

  front wheel of a bicycle and similar equipment.

Claims (4)

CLAIMS.   1) Device for transforming a reciprocating linear movement into a continuous rotary movement characterized in that it includes the use of a ratchet 12 driving a transmission shaft 13, inserted between two parallel racks 19 and 8, in opposite directions, integral with each other at their ends, being able to deviate slightly from the ratchet 12 by being retained by springs 14 and 15, and held in place and direction by lugs 10 and 9 on which it slides, guided by the edges 4 of the ratchet 12, so that whatever the movement imparted to the racks 19 and 8 in the lengthwise direction, these rotate the ratchet 12 in the same way.   2) Device according to claim 1 applied to the drive of the front wheel of a bicycle by an oscillating handlebar 2 characterized in that the double rack system can be connected at one of its ends to one end of the handlebar by a rigid metal rod 5 articulated in point attachment 6 with the handlebars.   3) Device according to claim 1 applied to the drive of the front wheel of a bicycle characterized in that the double rack system is horizontal (in the rest position) around the ratchet 12 and connected at its ends to the handlebars by rigid metal rods, the connection between these rods and the double rack system being made by pins which can slide vertically. 4) Device according to claim 1 applied to the drive of the front wheel of a bicycle characterized in that the double rack system can be connected in the middle to the handlebars, by a rigid metal piece integral with the handlebars,% 0 making fork above the main rack, which it activates by means of lugs hinging in orifices studied for this purpose, orifices located on either side of the back-and-forth on   metal parts attached to the main rack.   ) Device according to claims 1 and 4 characterized   in that the double rack system connected in its middle to the handlebars can be held at its ends by springs connecting them to the metal rod integral with the handlebars. 6) Device according to claim 1 and 2 characterized in that the double rack system can be rigidly connected to the handlebars, in which case its racks must be curved so as to follow the movement   metal part (s) connecting it to the handlebars.   7) Device according to claims 1 and 6 characterized   in that the racks can be of adjustable curvature so that they can be adapted to different handlebar heights.