JPH021719B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) Automobiles 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, there is a transmission as a drive means for bicycles, 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 violently. It does not reduce fatigue.

(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, thereby increasing the running force. At the same time, when the crank becomes vertical and the drive torque stops, the released energy of the spring is added to continuously drive the bicycle, so there is no temporary speed reduction even when climbing, and the bicycle has a high climbing performance. can be provided.

Next, the details will be explained using the drawings.

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

FIGS. 2a and 2b are motion diagrams illustrating the principle of the present invention.

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

In FIG. 1, 1 is a vehicle body, and 2, 2' are spring bodies provided on both left and right sides of the vehicle body 1. 3, 3' are cranks, 4, 4' are pedals, 5, 5' are pedals 4,
The front ends of the spring bodies 2, 2' are connected to each other by a support piece provided on the inner plate of the spring body 4'. Reference numerals 6 and 6' denote supporting pieces fixedly or removably screwed to both sides of the rear portion of the vehicle body 1, to which the rear ends of the spring bodies 2 and 2' are pivoted, respectively. Preparatory holes 7 are pre-drilled in the supports 6, 6' so that the pivot position can be changed at any time depending on the length or shortness of the spring. 8 is a crankshaft.

(Function) When placing each foot on the pedals 4 and 4' as usual and stepping on them, the spring body 2 on the side of the pedal 4 which is about to be depressed is attached to the crank 3 as shown in Fig. 2a. As the spring body 2' rotates, it is gradually stretched, and the spring body 2' on the opposite side contracts. Since the spring body 2 on the side to be stretched moves in a straight line to near the crankshaft 8 according to the inclination angle of the crank 3, the accumulated energy of the spring body 2, which is gradually strengthened, also becomes relatively easy on the leg force due to the principle of leverage. Moreover, it can be stored instantly. Thus, the maximum energy accumulated in the first half of crank 3 is the second
It is released all at once from the position of the crank 3 shown in Figure b, and pulls the crank 3 back from the bottom dead center to the center of the second half of rotation. On the other hand, the counter crank 3' gradually stretches the panel body 2', which has zero pressure, and moves it to the second position.
Rotate to the same position as in figure a. During this period, the driving torque of the cranks 3, 3' from the bottom dead center to the top dead center is zero or close to zero in a normal car, as shown in FIG. As shown in the figure, the force of spring c is applied between the interruptions in the driving torque from left foot a and right foot b, and the combined driving torque becomes continuous. Therefore, if there is less temporary drop in speed and the rider does not fall down when pitching, his pitching performance will improve. 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. As mentioned above, the principle of a spring that has an advantageous effect on crank rotation is that the energy released by the 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 emitted by the spring is momentarily much greater than the equivalent energy of the counter spring, a result of these different spring characteristics acting simultaneously on crank rotation.

Incidentally, in the present invention, as is clear from the positions of the cranks 3 and 3' in FIG. Support piece 6 from 4',
This results in that the lengths of the spring bodies 2, 2' connected to the pedals 6' are equal and that they are at the same distance, so that the force of each spring body 2, 2' acts equally on the pedals 4, 4' and balances each other. The position of the pedals 4, 4', which are always stationary, is an advantageous position for stepping down L, and is convenient for getting on and off the vehicle.

(Effects of the Invention) As is clear from the above description, the present invention has an advantageous structure of a crank rotation mechanism that integrates a spring and a pedal, which reduces leg fatigue, provides a comfortable ride, and increases running power, making it strong on slopes and long distance rides. It has the feature of being able to travel relatively easily even when carrying a load, has a structure that can be used in most conventional bicycles, and can be manufactured easily and inexpensively, making it extremely useful as an auxiliary power device for bicycles.

[Brief explanation of drawings]

FIG. 1 is a side view showing the structure of the present invention. FIGS. 2a and 2b are motion diagrams illustrating the principle of the present invention. FIGS. 3a and 3b are diagrams showing differences in driving torque between an ordinary bicycle and the present invention. 1... Vehicle body, 2, 2'... Spring body, 3, 3'...
Crank, 4, 4'...Pedal, 5, 5'...Support piece provided on the pedal, 6, 6'...Support piece provided at the rear of the vehicle body, 7...Spring mounting hole, 8...Crankshaft .

Claims (1)

[Claims] 1. Provide a support piece on the inner plate of the pedal, connect the front end of the spring body to the support piece, and install an integrated spring-loaded pedal on each tip of the crank, and place the rear end of the spring body near the back pipe at the rear of the vehicle. 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.