JPS61207282A - Bicycle with spring utilizing drive - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Industrial Application Field) Bicycles are simple and extremely economical means of transportation, and are indispensable and convenient vehicles. The above fields of use will further expand and contribute greatly to society.

(Prior art) Conventionally, a bicycle has a transmission as a drive means, and while this is effective mainly when riding a bicycle, the speed reduction ratio increases the number of revolutions of the crank and makes the legs move more intensely, which causes fatigue. It will not be a reduction.

(Problems to be solved by the invention) Bicycles that are driven by leg power consume a lot of energy when riding long distances, on hills, or when carrying a load, and are easily tiring. Since the driving torque of the bicycle is zero or close to zero, when the speed is slow and there is a lot of resistance, such as when riding a bicycle, there is a risk that the bicycle will slow down and fall while the driving torque is interrupted.

(Means for Solving the Problems) The present invention configures a drive mechanism that integrates a spring and a pedal to rotate the crank, and adds the driving force to the crankshaft rotated by the leg force to drive the vehicle. In addition to increasing the force, when the crank becomes vertical and the drive torque stops, the energy released by the spring is added to continuously drive it, so there is no temporary drop in speed when climbing, and it is possible to increase the speed even when climbing. We can provide high-performance bicycles.

Next, the details will be explained using the drawings.

FIG. 1 is a side view showing the structure of the present invention.

FIG. 2 (al (b)) shows a detailed explanation of the motion of the present invention.
It is.

FIGS. 3(a) and 3(b) are diagrams showing the differences in driving torque between an ordinary bicycle and the present invention.

In Figure 1, (1) is the car body, (2) and (3) are the car body (1
) is a spring body provided on both the left and right sides. (3) (3')
is the crank, (4) (A) is the pedal, (5) (51 is the support piece attached to the inner i plate of the pedal (41<<),
The front ends of the spring bodies (2) and (3) are joined together. (6) (σ)
is a support piece that is fixedly or removably screwed on both sides of the rear of the vehicle body (1), and includes spring bodies (2) and (3).
The rear ends of each are pivoted to each other. Also, this support (6) (σ
) is pre-drilled with a preliminary hole (7) so that the pivot position can be changed at any time depending on the length or shortness of the spring. (8) is the crankshaft.

(Function) When placing each foot on the pedal (4) (4') as usual and stepping on it, the spring body (2) on the side of the pedal (4) that is about to be depressed is shown in Figure 2. As is clear from (a), the spring body (3) is gradually stretched as the crank (3) rotates, and the spring body (3) on the opposite side contracts. Since the spring body (2) on the stretched side moves in a straight line toward the crankshaft (8) along the inclination angle of the crank (3), the accumulated energy of the spring body (2), which is gradually strengthened, also increases. Using the principle of leverage, it is possible to accumulate leg strength instantaneously with relatively easy leg strength. In this way, the maximum energy accumulated in the first half stroke of the crank (3) is released all at once from the position of the crank (3) shown in FIG.
Pull back from the bottom dead center to the center of the second half of the rotation. On the other hand, the counter crank (31) rotates to the same position as shown in Fig. 2(a) while gradually stretching the spring body (3) with zero pressure. As shown in Fig. 3(a), the driving torque near the top dead center is zero or close to zero in a normal bicycle, but in the present invention, the driving torque near the left foot (a) and the right foot as shown by the dotted line (in Fig. 3) is ) is interrupted, the force of the spring (C) is applied, and the combined driving torque becomes continuous. Therefore, even when pitching, there is little temporary drop in speed and the rider does not fall over, which improves pitching performance accordingly. The range of rotation of the cranks (3) (3') due to this spring action extends to about 80% of the entire circumference of the cranks. The principle of a spring that has an advantageous effect on crank rotation is as mentioned above.The energy released by a spring is an explosive force that releases the maximum amount of accumulated energy at once, whereas the energy accumulated in the spring is zero. Its power gradually increases from then until it reaches its maximum power. Therefore, the energy released by the spring is momentarily warmer than the equivalent energy of the counter spring, a result of these different spring characteristics acting simultaneously on crank rotation.

Furthermore, as is clear from the position of crank (3) (31) in FIG. is supported by 9 pieces (6) (σ) from the pedal (4) K)
The lengths of the spring bodies (2) and (3) connected to the pedals (2) and (3) are equal and the same distance apart, and the force of each spring body (2) and (3) is applied to the pedal (4).
) (4') and balance each other out. And this pedal that is always stationary (4) (a)
The position is the most advantageous position for stepping down and is convenient for getting on and off.

(Effects of the Invention) As is clear from the above explanation, the present invention is most advantageous in that it integrates a spring and a pedal.The structure of the rank rotation mechanism reduces leg fatigue, provides a comfortable ride, and can be used in most conventional bicycles. Since it is easy and inexpensive to manufacture, it is extremely useful as an auxiliary power device for bicycles.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the structure of the present invention. Figure 2 (a
) (b) is a motion diagram illustrating the present invention in detail. FIGS. 3(a) and 3(b) are diagrams showing differences in driving torque between an ordinary bicycle and the present invention. (1)...Vehicle body, (2)(3)...Spring body, (
3) (3')...Crank, +41 (<)...
Pedal, (5) +5')...Support piece provided on the pedal, (6)(σ)...Support piece provided on the rear of the vehicle body, (
7)...Spring mounting hole, (8)...Crankshaft. Porridge 3 figure time → Time period -

Claims (1)

[Claims] A support piece is provided on the inner plate of the pedal, the front end of the spring body is connected to the support piece, and an integrated spring-loaded pedal is provided at each tip of the crank, and the rear end of the spring body is placed near the back pipe at the rear of the vehicle body. A bicycle with a spring-based drive device, characterized in that the left and right sides of a supporting piece are connected to each other by fixing or screwing.