JPH06239284A - Epoch-making gear crank for bicycle - Google Patents

Abstract

PURPOSE:To ensure the proper achievement of such a revolutionary and very large increase in driving force as two or three times of a conventional value, exactly at the same travel speed as in a conventional case. CONSTITUTION:Upper corner gears 6 and 3T are formed on the left upper end corner of an oblong base plate 5 integrated with the crankshaft 4 of a conventional rear crank 3. Also, the same number of under corner gears 7 and 3T are formed on the opposite right end lower corner of the plate 5. In addition, the upper corner gear 6 and under corner gear 7 at both ends of the plate 5 are connected to the free wheel 13 of a rear wheel via a chain 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a revolutionary strongest and lightest drive system of a bicycle which uses an epoch gear crank.

[0002]

2. Description of the Related Art A conventional bicycle drive system is shown in FIGS.
As described above, the wheel shaft mechanism uses the crankshaft (4) as a lever, the R pedal shaft (2) to the L pedal shaft (15) as power points, and the large gear (19) as a point of action. . Therefore, for a radius 1 of the large gear (19), the lengths of the R crank (3) and the L crank (16) are about 2.4.
It is formed in the front and rear ratio. Accordingly, the stepping force of 1 concentrated on the R pedal shaft (2) to the L pedal shaft (15) is only 2 or 4 times at the large gear (19) which is the point of action. It is a very weak driving force that is increased to some extent. With this weak driving traction force, the chain (10) is pulled to rotate the freewheel (13) and the rear wheels are rotated forward.

[0003]

DISCLOSURE OF THE INVENTION The present invention makes full use of the strict law of lever under the same traveling speed (non-shifting, non-decelerating) as a conventional bicycle, and its driving propulsion force is It is possible to achieve a truly epoch-making dramatic increase of 3 times that of the conventional one, and this is achieved and realized without fail. The current bicycle drive mechanism as shown in FIGS.
It was invented and installed 8 years ago, and has been extremely low efficiency and low performance for a long time in the century since it was used as a gear crank of a wheel axle mechanism. The present invention is
It was the inventor of a "bicycle epoch gear crank" that was novel, innovative, and useful, by overcoming such mannerism all at once.

[0004]

[Means for Solving the Problems]

(A) "Bicycle epoch / gear crank" of the present invention
1, the upper corner gear (6) having the smallest possible number of teeth is formed in the upper left corner of the oblong base plate (5) formed by combining with the R crank (3) as shown in FIG. To form. In this case, it is 3T. (B) Further, the under corner gears (7) (3T) having the same number of teeth are formed at the opposite lower right corner. (C) The back ring (17) is attached to the back surface of the base plate (5). (D) The chain (10) connects the upper corner gear (6), the under corner gear (7) and the free wheel (13), respectively.

[0005]

The essential points of the operation of the drive mechanism of the present invention are that the R pedal shaft (2) and the L pedal shaft (15) are the leverage points, the crankshaft (4) is the fulcrum, and the upper corner gears at the left and right ends are the operation points. (6) and under corner gear (7)
It is a strong driving traction force that alternates and occurs in the part of.

[0006]

EXAMPLES Examples of the present invention will be described below.

As shown in FIG. 4, when the R crank (3) and the R pedal (1) are in the front horizontal state, if the pedal (1) is depressed, the 1 pedal concentrated on the R pedal shaft (2) at the power point. The stepping force is based on the crankshaft (4), and a strong driving force of 1: 7.2 is generated alternately at the under corner gear (7) or the upper corner gear (6), which is the point of action. To do. This is a drive force which is actually three times that of the conventional case shown in FIG. With this drastically increased driving force, the free wheel (13) that is pulled and interlocked with the chain (10) is rotated, and the rear wheel (rear wheel) is rotated forward.

However, even if the driving propulsive force achieved an epoch-making large increase of 3 times that of the conventional one, the traveling speed was inversely proportional to and immediately drastically reduced to 1/3. It is laborless and nonsense. In that respect, in the drive mechanism of the present invention, both the upper corner gear (6) and the under corner gear (7) at both ends rotate in a circumferential locus with a radius from the crankshaft (4), The traveling speed (the number of chain pitches) is exactly the same as in the case of the conventional gear crank of FIG.

As shown in FIGS. 2 and 6, the R crank (3), the L crank (16), and both pedals (1).
When (14) reaches the position of the upper limit dead point, or when it reaches the position of the opposite lower limit dead point, the area in front of and behind it is the drive force transmission impossible zone,
It clears this zone in an instant with its strong inertia and inertia.

From the start of stepping down in FIG. 2, the chain (10) proceeds in the manner of the under corner gear (7).
After meshing with (3T), chain front plate (1
1) and the back plate (12), the upper flange (upper edge) (8) of the base plate (5) is used as a pilot rail, and it is sandwiched from both sides of the front and back, and it progresses without deviating next. Smoothly and securely engage the upper corner gears (6) and (3T) of.
This is exactly the same as in the case of monorails (single-gauge railways) and never derails.

Further, as shown in FIG. 6, as soon as the R pedal (1) and the R crank (3) clear the lower limit dead point, the L pedal (14) and the L crank (16) on the opposite side move. Turning to the front stepped position, this time, the under flange (lower edge) (9) of the base plate (5) is used as a rail, and the chain (10) sandwiches this from both sides and advances straight.

By the way, the R crank (3) and the R pedal (2) are most easily depressed, and the effective and appropriate strong dynamic traction force is generated in the forward elevation angle of 45 ° as shown in FIG.
It is in a fan shape of about 90 ° vertically from the front and rear positions to the position at the front depression angle of about 45 ° as shown in FIG. 5 via the front horizontal position at the peak center time as shown in FIG. still,
The same is true when the L crank (16) on the opposite side and the L pedal (14) are turned to the forward stepped position.

Within the above-mentioned fan shape, the driving mechanism based on the "bicycle epoch gear crank" of the present invention exhibits a revolutionary and intense driving force which is twice or triple that of the conventional one. Moreover, its traveling speed is exactly the same as the conventional one.

Thus, the "bicycle epoch of the present invention
The "gear crank" is an epoch-making ultra-light running that is one-third of the conventional one on a flat ground with little resistance, and the depression of the R pedal (1) to the L pedal (14) is heavy immediately after that. It is difficult and difficult, and the most weak point of the bicycle is the point of crying, and on the uphill road where it is usual to get off the car halfway, it is possible to easily and easily climb uphill with the sudden and intense driving force of 2 to 3 times the conventional one. Became.

Also in the drive mechanism of the present invention, the rotating gear part and the chain part are covered with a chain case having an appropriate shape just as in the conventional case for the safety of the occupant.

As a result of a long-term rigorous test drive test, the driving performances of the super-strong and the super-light are all demonstrably verified and confirmed.

In addition, smooth and smooth rotation of each transmission mechanism, quietness and lightness during actual driving. In all other respects, such as absolutely safe and comfortable riding comfort, there is no discomfort and it is exactly the same as the case of the conventional drive mechanism of FIG.

[Brief description of drawings]

FIG. 1 is a right side view of an epoch gear crank of a bicycle according to the present invention.

2 is an R crank (3) of FIG. 1 according to the present invention;
It is a right view when the R pedal (1) is at the upper limit dead point position.

FIG. 3 is a right side view of the present invention when the R crank (3) and the R pedal (1) are at a front elevation angle of 45 °.

FIG. 4 is a right side view of the present invention when the R crank (3) and the R pedal (1) are in the front horizontal position.

FIG. 5 is a right side view of the present invention when the R crank (3) and the R pedal (1) are at a front depression angle of 45 °.

FIG. 6 is a right side view of the present invention when the R crank (3) and the R pedal (1) are at the lower limit dead point position.

FIG. 7 is a right side view of a conventional gear crank (in the case of a large gear 32T).

8 is a right side view of a drive mechanism including the conventional gear crank of FIG.

[Explanation of symbols] 1 R pedal 13 In case of free wheel (14T) 2 R pedal shaft 14 L pedal 3 R crank 15 L pedal shaft 4 crank shaft 16 L crank 5 Base plate (oblong ellipse) 17 Back ring 6 Upper corner gear (In case of 3T) 18 Chain stay 7 Under corner gear (in case of 3T) 19 Large gear 8 Upper flange (upper edge) 9 Under flange (lower edge) 10 Chain 11 Front plate (inside and outside) of chain 12 Back of chain Plate (inside, outside)

Claims (3)

[Claims] 1. A gear crank as a bicycle drive mechanism, comprising a crankshaft (4) of an R crank (3) as shown in FIG.
The upper corner gear (6) having the smallest possible number of teeth is formed at the upper left corner of the oblong base plate (5) formed as a unit. Also, in the lower right corner of the diagonal,
The under-corner gear (7) having the same number of teeth is formed. 2. A back ring (17) is integrally attached to the back surface of the base plate (5). 3. The chain (10) connects the upper corner gear (6) and the under corner gear (7) to the rear freewheel (13), respectively.