KR980009033A - Bicycle power transmission - Google Patents

Abstract

The present invention relates to a two-way clutch, comprising: a crankshaft axially fixedly secured to a pedal; two one-way clutches spaced a predetermined distance apart from each other on the crankshaft so as to transmit power in opposite directions to each other; A two-stage planetary gear interlocked with the sun gear and the ring gear at a position spaced apart from the sun gear by a predetermined distance in the axial direction between the sun gear and the ring gear, a sprocket wheel fixed to the side of the ring gear, A shaft rod fitted in the hollow portion of the planetary gear, and a fixture fixed to the frame to fix the shaft rod.

Description

Bicycle power transmission

FIG. 1 is a sectional view showing a bicycle transmission apparatus according to the present invention; FIG.

DESCRIPTION OF THE REFERENCE NUMERALS

10: Pedal 11: Between pedals

12: crankshaft 13: first one-way clutch

14: second one-way clutch 15:

16: sun gear 17: planetary gear

18: shaft rod 19: fastener

20: Sprocket wheel 21: Drive chain

22: frame

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a bicycle transmission apparatus, and more particularly, to a bicycle transmission apparatus in which the bicycle is advanced even if the crankshaft of the bicycle rotates in any direction.

A conventional bicycle transmission apparatus according to the related art advances the bicycle only when the crankshaft rotates in the forward direction (the direction of rotation of the crankshaft to advance the bicycle), and when the crankshaft rotates in the reverse direction (the opposite direction to the forward direction) The bicycle is configured so that it does not move.

However, since the above-described prior art bicycle power transmission apparatus advances only when the crankshaft is rotated in the forward direction only, the driving operation is monotonous, and only a part of specific muscles are intensively exercised, resulting in fatigue or knee joint problems .

SUMMARY OF THE INVENTION It is an object of the present invention to provide a bicycle transmission apparatus capable of advancing a bicycle even if the crankshaft of the bicycle is rotated in any direction.

In order to achieve the above object, a bicycle transmission apparatus according to the present invention comprises a crankshaft having a pedal interposed thereon, two one-way clutches spaced apart from each other at a predetermined interval on the crankshaft, A planetary gear meshing with the sun gear and the ring gear of the rotating body at a position spaced apart from the sun gear by a predetermined distance in the axial direction between the sun gear and the rotating body; A sprocket wheel fixed to a side surface of the rotating body, a shaft rod fitted to the hollow of the planetary gear so that the planetary gear rotates, and a fixture fixing the shaft rod and fixing the shaft to the frame .

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

An embodiment of the invention is shown in FIG. The present invention of the above-described embodiment is characterized in that a pedal 11, a pedal 11, a crankshaft 12, and a crankshaft 12 are disposed on the crankshaft 12 at predetermined intervals so as to transmit power in opposite directions Way clutch (13), a rotating body (15) which is formed on the outer peripheral surface of the first one-way clutch (13) and in which a ring gear is formed inside the other end, A sprocket wheel 20 fixed to a side surface of the rotating body 15; a driving chain 21 engaged with the sprocket wheel 20 and driving a rear wheel; Stage planetary gear 17 that is engaged with the ring gear portion of the planetary gear 17 and the sun gear 16, a shaft rod 18 fitted to the hollow of the planetary gear 17 so that the planetary gear 17 rotates, And a fixture (19) fixed to the frame (22).

The operation and effect of the present invention will be described below.

When the pedal 10, the pedal 11 and the crankshaft 12 are rotated in the forward direction by the pressing force, the first one-way clutch 13, which is installed on the crankshaft 12, And the rotating body 15 rotates the sprocket wheel 20 and the planetary gear 17 fixed to the rotating body 15 and rotates the driving wheel 21 in the forward direction by the sprocket wheel 20, The bicycle advances by rotating from the forward direction. Further, the planetary gear 17 rotates the sun gear 16 in the reverse direction.

At this time, the second one-way clutch 14 is idly rotated without forward power due to the forward rotation of the crankshaft 12 and the reverse rotation of the sun gear 16.

When the pedal 10, the pedal 11 and the crankshaft 12 are rotated in the reverse direction by the repulsive force, the second one-way clutch 14, which is provided on the crankshaft 12, rotates together with the sun gear 16 And the sun gear 16 rotates in the reverse direction and the sun gear 16 is rotated by the sprocket wheel 20 rotating in the forward direction while rotating the rotary body 15 and the sprocket wheel 20 in the forward direction via the planetary gear 17 By rotating, the rear wheel rotates in the forward direction, and the bicycle advances.

At this time, the first one-way clutch 13 idles without transmitting the power due to the reverse rotation of the crankshaft 12 and the forward rotation of the rotating body 15.

Here, the rotation ratio R of the sprocket wheel 20 with respect to the rotation of the crankshaft 12 is 1 because the crankshaft 12 rotates together with the rotating body 15 and the sprocket wheel 20 at the time of forward rotation, when R is the _{R = (Z S Z P1)} / (Z P2 Z R). Here, Z _S and Z _R represent the number of teeth of the sun gear 16 and the ring gear, and Z _P1 and Z _P2 represent the number of teeth of the two-stage planetary gear 17 meshing with the ring gear and the sun gear 16, respectively.

Therefore, _P1 = Z _S Z Z If the _P2 Z _R at the time of non-rotation is reverse rotation, but the first sun gear 16, the ring gear and can have any value by the number of teeth of the planetary gear 17.

Speed is the crankshaft (12 Z _S Z _P1> Z _P2 Z _R is by selecting the number of teeth of the sun gear 16, a ring gear and a planetary gear 17 that is R is larger is than the first sprocket wheel 20, as needed And the driving force becomes smaller. When Z _S Z _P1 <Z _P2 Z _R , the number of revolutions of the sprocket wheel 20 is smaller than that of the crankshaft 12, but a large driving force can be obtained.

Therefore, when the value of R is not 1, the conversion of the crankshaft 12 in the forward and reverse directions has the same effect as the shift, and accordingly, the rotational speed and the transmission torque in the forward direction and the reverse direction are changed, The crankshaft 12 can be rotated in the forward direction or the reverse direction according to the running resistance, so that various smooth running can be performed. Further, the present invention has a braking characteristic in the backward direction automatically when the bicycle climbs uphill, and its working principle is as follows. When a bicycle climbs an uphill road, when the force component in the direction of the slope of the total resultant force acting on the bicycle is greater than the force component due to the forward driving force, the bicycle tries to move backward. As a result, a tension is applied to the drive chain 21 to rotate the rear wheel in the backward direction by the backward movement of the rear wheel. This tension tries to rotate the sprocket wheel 20 in the reverse direction, The first one-way clutch 13 and the crankshaft 12 are intertwined to rotate the crankshaft 12 in the opposite direction to rotate the clutch 13 in the reverse direction. At the same time, the driving force transmitted through the planetary gear 17 by the rotary body 15 receiving the driving force by the tension tries to rotate the sun gear 16 and the crankshaft 12 in the forward direction.

As a result, at the time of the backward movement of the bicycle, the driving force acting by the first one-way clutch 13 and the driving force acting by the second one-way clutch 14 are equal to each other and acting in opposite directions, The rotating body 15 and the sun gear 16 are stopped and the sprocket wheel 20 is stopped.

Therefore, according to the present invention, when the crankshaft 12 rotates in either the forward or reverse direction, the bicycle advances, and when the bicycle climbs the uphill, the bicycle does not move backward due to the structural characteristics.

As described above, according to the present invention, there is provided a vehicle including a crankshaft in which a pedal cross section and a one-way clutch are housed, a rotating body and a sun gear shrouded on the outer circumferential surface of the one-way clutch, and a sprocket wheel fixed to a side surface of the rotating body, A planetary gear interposed between the sun gear and the ring gear, a sprocket wheel fixed to a side of the ring gear, a shaft rod fitted to the hollow portion of the planetary gear so that the planetary gear rotates, The bicycle is advanced by rotating the crankshaft of the bicycle in either positive or negative direction so that the increase in the fatigue accumulation value such as the blood lactate concentration, the energy consumption and the oxygen uptake per minute caused by the one-way pedaling, Excessive movement of the muscles only, problems such as fatigue quickly or knee joints, such as the It is possible to eliminate the darling trouble phenomenon, and when the bicycle climbs uphill, it automatically brakes in the reverse direction to prevent the bicycle from moving backward. By varying the size of the sun gear, ring gear and planetary gears, it is possible to vary the rotation speed and the transmission torque in the forward and reverse directions and rotate the crank shaft in the forward or reverse direction depending on the uphill road or the fluctuating driving resistance, There are advantages.

Claims (3)

A first and a second one-way clutches spaced apart from each other by a predetermined distance on the crankshaft so as to transmit power in opposite directions to each other, and a first and a second one-way clutches formed on the outer circumferential surface of the first one- A sprocket wheel fixed to a side face of the scraper body; a drive chain for driving the rear wheel; and a driving chain for driving the rear wheel, A two-stage planetary gear meshing with the sun gear and the ring gear at a position spaced apart from the sun gear by a predetermined distance in the axial direction between the sun gear and the ring gear, a shaft rod fitted to the hollow of the planetary gear, And a fixture fixed to the frame to fix the shaft rod. The bicycle transmission device according to claim 1, characterized in that the rotation ratio of the sprocket wheel to the rotation of the crankshaft during forward and reverse rotation is 1, and the combination of the sun gear, the planetary gear and the ring gear. The bicycle electric rolling machine according to claim 1, characterized by having a combination of the sun gear, the planetary gear and the ring gear in which the rotation ratio of the sprocket wheel with respect to the rotation of the crankshaft during forward and reverse rotation is not 1. ※ Note: It is disclosed by the contents of the first application.