SU1562219A1 - Bicycle actuator - Google Patents

Abstract

This invention relates to mechanical engineering, in particular to bicycle drives. The purpose of the invention is to provide two modes of movement of the bicycle by changing the position of the connecting rods relative to the axes of the driving elliptical gear. The bicycle drive contains a carriage shaft 2 with rods 16, the slots 6 of which have a clutch disc 5 with grooves 4, which include spikes 3 of the leading elliptical gear 1, freely mounted on the shaft of the carriage 2 and interacting with another elliptical gear 10, freely mounted on shaft 12 and located in a monoblock with a cylindrical gear 11, associated with a cylindrical gear 13, made in a monoblock with a leading sprocket 14. Changing the position of the rods 16 relative to the leading elliptical gear 1 along small or large the ellipse axis allows two modes of movement of the bicycle to be obtained. 5 il.

Description

(21) 4408900 / 27-11

(22) 1304.88

(46) 05.07.90. Bul № 17 (75) T. V. Nazarov

(53) 629.118 (088.8)

(56) U.S. Patent No. 4281845, Cl. 280-236, 1981.

(54) BIKE DRIVE

(57) The invention relates to mechanical engineering, namely to bicycle drives. The purpose of the invention is to provide two modes of movement of the bicycle by changing the position of the connecting rods relative to the axes of the driving elliptical gear. The bicycle drive contains a carriage shaft 2 with rods 16, the slots 6 of which have a clutch disc 5 with grooves 4, which include spikes 3 of the leading elliptical gear 1, freely mounted on the shaft of the carriage 2 and interacting with another elliptical gear 10, freely mounted on shaft 12 and located in a monoblock with a cylindrical gear 11, associated with a cylindrical gear 13, made in a monoblock with a leading sprocket 14. Changing the position of the connecting rods 16 relative to the leading elliptical gear 1 along shoy axis of the ellipse enables the bicycle to obtain two modes of motion. 5 il.

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FIELD OF THE INVENTION The invention relates to mechanical engineering, namely to bicycle drive designs.

The purpose of the invention is to provide two modes of movement of the bicycle by changing the position of the connecting rods relative to the axes of the driving elliptical gear.

FIG. 1 shows a bicycle drive, cross section; in fig. 2 - the same, side view; in fig. 3 is a diagram of the active and idling of the pedal rods; in fig. 4 - the position of the connecting rods relative to the leading elliptical gear, providing the maximum speed of movement; in fig. 5 - the same, providing the transmission of maximum torque.

The bicycle drive consists of an elliptical gear 1, which, in its central part, freely mates with the shaft of the carriage 2. On the end surface of gear 1 there are spikes 3 which fit into the grooves 4 of the clutch disc 5. The disk 5 is mounted on the splines 6 of the shaft of the carriage 2 and is spring-loaded along the axis of the carriage shaft by a returning cup spring 7. Next to the edge of the clutch disc 5 is the release lever roller 8. which is connected via cable 9 to a control handle with a switch (not shown). In engagement with the elliptical gear 1, there is a second elliptical gear 10, made in a monoblock with an intermediate cylindrical gear 11. A monoblock of gears 10 and 11 is mounted on the intermediate shaft 12 with the possibility of free rotation on it. The second monoblock, consisting of a cylindrical gear 13 and a leading sprocket 14 of the chain transmission 15, is freely mounted on the shaft of the carriage 2. At the ends of the shaft of the carriage 2, the connecting rods 16 of the bike's legs are rigidly fixed.

The drive of the bike works as follows.

Under the action of the cyclist’s muscular effort, the rods 16 rotate the shaft of the carriage 2 on the pedals. intermediate monoblock with spur gear 11. The second monoblock of gear 13 and sprocket 14 receives rotation from gear 1 1 to gear 13 and transmits it through sprocket 14 to a chain transmission 15 and further to the driving wheel of the bicycle .

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When the control handle (not shown) is squeezed out, the cable 9 acts on the release lever 8, which pushes the clutch disc 5 along the spline 6, overcoming the resistance of the returning disc spring 7. At the same time, the clutches 4 of the clutch disc 5 are disengaged from the spikes 3 of the drive shaft. the elliptical gear 1 and the shaft of the carriage 2 rotates with the clutch disc 90 ° up to the limit stop. After that, the control arm is released, the spikes 3 are inserted into the grooves 4 and the connecting rods 16 occupy a new position relative to the leading elliptical gear 1.

The drive provides two fixed

the position of the rods 16 relative to the leading elliptical gear 1. In this case, on the active areas of rotation of the rods, gear 1 interacts with gear 10 with a large radius, transmitting a smaller moment at a higher speed of the bicycle, along the major axis of the ellipse leading elliptical gear 1 (Fig. 5) -

5 in this case, in the active areas of rotation of the connecting rods, the gear 1 interacts with the gear 10 with smaller radius, transmitting more torque at a lower speed of the bicycle.

Each successive switch is made by squeezing the handle and idling the rods through 90 °.

Claims (1)

Invention Formula A bicycle drive containing a carriage shaft with pedals mounted on it with pedals, a leading elliptical gear connected to the carriage shaft, driven by elliptical gears and cylindrical gears for transmitting power to the driving star daughter, characterized in that in order to provide two modes of movement by changing the position of the connecting rods relative to the axes of the leading elliptical gear, it is equipped with a coupling disc with grooves mounted on the carriage on the shaft 5 slots with the possibility of axial movement, a returning disc spring to hold the clutch disc in the on position, a squeezing lever connected to the drive to interact with the clutch disc, while the leading elliptical Gear 0 is mounted on the carriage shaft loosely and equipped with spikes to interact with the slots of the clutch disc during force transmission. 15 / FIG. 74 Fig.Z 15 Figm sixteen 74 FIG. five