JPH023992Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a bicycle that moves forward with either forward or reverse rotation of the pedal.

BACKGROUND OF THE INVENTION Recently, bicycles have been reconsidered as sports equipment or leisure equipment for promoting health, and cycling vehicles have become popular. The present invention relates to a bicycle suitable for the above-mentioned uses.

In conventional bicycles, a chain is passed between a chain sprocket fixed to the petal shaft and a chain sprocket attached to the rear wheel shaft via a one-way clutch to transmit the rotation of the petal to the rear wheel. Therefore, if you rotate the pedal in the opposite direction,
A one-way clutch on the rear axle leaves it free and does not transmit rotation to the rear wheels.

Problems that the invention aims to solve: Since the conventional bicycle described above only transmits rotation in one direction, only the same leg muscles are always used, and muscles that are not used often cannot be trained. In addition, since it always rotates in the same direction, the movement becomes monotonous, making it uninteresting as a leisure item.

Therefore, the present invention aims to provide a bicycle that can be moved forward by either forward or reverse rotation of the pedals, which can evenly train the leg muscles and improve health, and which can also be enjoyed for leisure use. purpose.

Means for Solving the Problems The structure of the present invention that achieves the above object will be explained with reference to FIG.

A chain sprocket 5 and a gear 6 are provided on a petal shaft via one-way clutches 7 and 8 whose operating directions are opposite to each other, and a chain interlocking with the chain sprocket 5 and a gear 6 is provided on an intermediate shaft 2 parallel to the petal shaft. A sprocket 10, a gear 11 meshing with the gear 6, and a chain sprocket 12 for transmission to the rear wheels are provided so as to rotate together. The rotation of the chain sprocket 12 is then transmitted to the rear wheels via the chain 13.

Function: Regardless of whether the shaft 1 is rotated in the forward or reverse direction, one of the one-way clutches 7 and 8 is always engaged, so by rotating the pedal in the forward and reverse directions, the chain sprocket 5 or the gear 6 is rotationally driven. Chain sprocket 5 rotates through chain 9.
, so that sprocket 5 and sprocket 10 rotate in the same direction. Also, the rotation of gear 6 is caused by gear 11
It is transmitted as a rotation in the opposite direction. Therefore, no matter which direction the petal 14 is rotated, the chain sprocket is rotated in the same direction (forward direction).
The rear wheels connected to it are also always driven only in the forward direction.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 indicates a petal shaft, and the petal shaft is connected to a chain sprocket 5 for driving via one-way clutches 7 and 8 whose operating directions are opposite to each other.
and a driving gear 6. In the illustrated embodiment, when the one-way clutch 7 is in the A rotation direction, the one-way clutch 8 is transmitted to the stage in the B rotation direction. A shaft 2 is provided on the frame parallel to the petal shaft 1, and the shaft 2 includes a chain sprocket 10 driven by the chain sprocket 5 via a chain 9, a gear 11 meshing with the gear 6, and a chain. It is rotatably provided integrally with a sprocket 12. Reference numeral 16 denotes a rear wheel rotatably mounted on the rear wheel shaft 15. A chain sprocket 14 is provided at the boss portion of the rear wheel 16 via a one-way clutch 15, and the chain sprocket 14 and the chain sprocket are connected to each other. A transmission chain B is stretched between the two.

In addition, the chain sprocket 10 and the gear 1
1 and chain sprocket 12 are each constructed separately and fixed to the shaft 2.
Of course, it is also possible to make it rotatable.

With the above structure, when the petal shaft 1 is rotated in the direction of arrow A by stepping on the pedal 4, the one-way clutch 7 becomes engaged and the one-way clutch 8 becomes free. Therefore, only sprocket 5 is rotated, and the rotation is transmitted to chain sprocket 1 via chain 9.
0, and the sprocket 10 and the gear 11 and chain sprocket 12 integrated therewith are also
Rotate in the direction. The rotation of the chain sprocket 12 rotates the chain sprocket 14, and this rotation is transmitted to the wheel 16 via the one-way clutch 15, causing the rear wheel 16 to rotate in the direction A, that is, in the forward direction of the bicycle.

Further, when the petal 4 is rotated in the direction of arrow B, the one-way clutch 7 becomes free and the one-way clutch 8 becomes engaged. Therefore, the rotational force of the petal is transmitted to the gear 11 only through the gear 6. Since the rotation directions of the gear 6 and the gear 11 are opposite, even when the pedal 4 is rotated in the direction of arrow B, the gear 11 is rotated in the direction A, that is, in the forward direction of the bicycle, that is, in the forward direction of the bicycle.

Note that if the rotation of the petal 4 is stopped while the rear wheel is rotating, the one-way clutch 15 of the rear wheel becomes free as in a conventional bicycle, and there is no problem with the rotation of the wheel.

Effects Since the present invention has the above-mentioned configuration, the bicycle moves forward whether the pedal is rotated in the forward or reverse direction. Therefore, by rotating the pedals in the opposite direction from time to time while cycling, you can not only enjoy cycling with a variety of changes, but also use the muscles in your legs, which are not often used, and provide a great cycling vehicle for improving your health. can.

In addition, the transmission mechanism of the present invention that transmits the forward and reverse rotation of the petals to the rear wheels as forward rotation simply combines chain transmission and gear transmission, and has a simple structure and other practical effects. It is something.

[Brief explanation of drawings]

Fig. 1 is a side view of the bicycle of the present invention, and Fig. 2 is an explanatory view showing the transmission mechanism. 1...petal shaft, 2...intermediate shaft,
3... Rear wheel shaft, 4... Petal, 5,1
0,12,14...Chain sprocket, 7,
8,15...One-way clutch, 9,13...
Chain, A... Bicycle.

Claims (1)

[Scope of utility model registration request] A chain sprocket and a gear are provided on a petal shaft via one-way clutches whose operating directions are opposite to each other, and a chain sprocket and a gear are provided on an intermediate shaft parallel to the petal shaft, which are interlocked with the chain sprocket via a chain. A bicycle characterized in that meshing gears and a chain sprocket for transmission to a rear wheel are provided so as to rotate together, so that both forward and reverse rotations of the petal shaft are transmitted to the rear wheels as rotation in the forward direction. .