JPH03189286A - Hand drive device for bicycle - Google Patents

Abstract

PURPOSE:To prevent lateral dislocation of a chain to improve durability by constituting the device so as to rotate a crank gear normally and reversely through moving a crank lever back and forth, and transmit the movement to a wheel driving shaft provided with two free gears in parallel through two sets of chain in parallel. CONSTITUTION:A crank gear 4 with which a crank lever 3 is provided is journaled so as to position on one line with a free gear 1, and intermediate gears 5, 6 are rotationally movably journaled in parallel between the free gear 1, 2 and the crank gear 4. The free gear 1 and the crank gear 4 are connected with each other through a bicycle chain 7, and the chain 7 is wrapped over them so as to contact with the intermediate gear 5 at its outer circumference in slackening condition. Further, the free gear 2 and the intermediate gear 6 are connected through a bicycle chain 8. Hereby, by operating the crank lever 3 back and forth, the free gears 1, 2 are respectively rotated through the chain 7 and 8 to rotate a wheel.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a manual instant motion device for a bicycle.

(b) Conventional technology Conventionally, two free gears were installed horizontally on the rear wheel hub in order to achieve forward drive even when the crank arm was rotated forward or backward using a single bicycle chain on a two-wheeled bicycle. Place them side by side, hang the chain properly on the crank gear, fold the chain in half, and place the side that hangs over the top of the crank gear on the inner free gear, and one side on the outer free gear from above. There was one in which an idling gear was provided to hang the hanging chain downward and guide the chain inside the bending position of the chain, and the two free gears were rotated in opposite directions.

(c) Problems to be solved by the invention In the conventional structure, in order to pass a single bicycle chain across two free gears installed side by side, the chain must be twisted sideways, resulting in damage to the chain. There was also the problem that the chain would shift quickly and cause the chain to slip laterally.

On top of that.

In the conventional technology, the crank arm is provided with a pedal, which is not suitable for people with limited mobility.

(d) Means for Solving the Problems The present invention has a structure in which two bicycle chains are connected in parallel and interlocked by providing an intermediate gear or the like so that the chains do not slip laterally. In addition, the conventional crank arm has been replaced with a crank lever so that it can be operated manually, allowing it to be used in wheelchairs, etc.

To explain the implementation in detail, as shown in Fig. 1,
Two parallel free gears (1) and (2) are installed on the wheel drive shaft with appropriate spacing.

A crank gear (4) provided with a crank lever (3) is pivotally supported so as to be located in line with the free gear (1).

Next, free gears (1) (2) and crank gear (4)
) and the fixed intermediate gear (
5) Support (6) rotatably.

The free gear (1) and crank gear (4) are connected with a bicycle chain (7). At this time, the chain is bent over the intermediate gear (5) so as to be in contact with the outer periphery of the bicycle chain (7).

It has a structure in which a free gear (2) and an intermediate gear (6) are connected by a bicycle chain (8).

In the second embodiment, as shown in FIG. 2, two parallel free gears (11) and (12) are installed on the wheel drive shaft with appropriate spacing.

Two crank gears (14) (15) are fixed on the same shaft with crank levers (13) positioned in line with the free gears (11) (12), respectively.
).

Next, free gear (11) and crank gear (14)
An intermediate gear (16) is rotatably supported so as to be located on the same line between the two.

A rotatable rear gear (17) located on the same line as the free gear (11), intermediate gear (16), and crank gear (14) is pivotally supported so as to be located behind the free gear (11).

Connect the bicycle chain (18) to the rear gear (17) so that the free gear (11) contacts the outer circumference of the bicycle chain (18) and is bent between the rear gear (17) and the intermediate gear (16). ), the free gear (11), the intermediate gear (16), and the crank gear (14) so as to connect them.Also, the bicycle chain (19) is tied around the free gear (12) and the crank gear (15). It is a structure that connects.

Furthermore, the embodiment of the crank lever for operation which is essential for the operation of the present invention is as shown in FIG.
) Built-in pipes (23) (24) have grip parts (
25) is the structure of the crank lever (26).

(e) Functional Embodiment In order to explain the first function, the two-speed bicycle chains (7) and (8) will be explained separately with reference to the drawings, FIG. 4, and FIG. 5. In addition, the free gear has a known ratchet mechanism, and will be described as having a structure in which it idles when rotating in one direction and locks when rotating in the opposite direction to rotate the shaft. In the case of the present invention, the explanation will be based on the premise that the ratchet mechanism locks when the free gear rotates clockwise.6 First, as shown in Figure 4, by tilting the crank lever (3) clockwise. The crank gear (4) rotates clockwise, causing the free gear (1) to rotate clockwise via the bicycle chain (7). At this time, the intermediate gear (
5) rotates in the opposite direction from clockwise. This rotation of the intermediate gear (5) is transmitted to the intermediate gear (6) shown in FIG. 5, and causes the free gear (2) to rotate counterclockwise via the bicycle chain (8). At this time, the free gear (1) will drive the axle. Next, although not shown, if the crank lever (3) shown in Figure 4 is tilted in the opposite direction from clockwise, all the gears will rotate in the opposite direction, and the free gear (2) will drive the axle. It will be necessary to do so.

Next, the action of the embodiment cylinder 2 is as shown in FIG. 6, when the crank lever (13) is tilted clockwise, the crank gear (14) rotates clockwise. The power is transmitted through the bicycle chain (18) to rotate the intermediate gear (16) clockwise, the rear gear (17) also to rotate clockwise, and the free gear (11) to rotate counterclockwise. As shown in Fig. 7, the crank gear (15), which is fixed coaxially with the crank gear (14), rotates clockwise, and the free gear (12) is rotated clockwise via the bicycle chain (19). Rotate it. In this case, the free gear (12
) rotates the axle. Although not shown, when the crank lever (13) shown in Figure 6 is tilted counterclockwise, all the gears rotate in the opposite direction and the free gear (11) drives the axle to rotate. let

Next, regarding the crank lever, the crank lever (26)
Since it has a vertically extendable structure, by changing the length of the crank lever, it is possible to create a difference in pitch between A and B in FIG. 8. Therefore, at A, force B
B requires less force than A, but because the pitch is shorter, it is possible to perform rapid repetitive motions.

Further, as shown in FIG. 9, there is an effect that the force is initially required and the force is loosened later, as shown in C and D.

(F) Example Regarding the desk embodiment tube 1 in which the above-mentioned device is explained as a specific example of a three-wheeled bicycle, the handle (3
A tricycle with a chair (31) and a footrest (3)
2), a brake (33), and a crank lever (26).

When using this, sit on a chair (31), hold the handle (30) with your left hand, and press the crank lever (26) with your right hand.
operate. It moves forward by repeatedly moving the crank lever (26) back and forth. When stopping, use the brake (33
) with your left hand.

Regarding the embodiment cylinder 2, FIG. 11 shows the embodiment cylinder 2 of the present invention.
FIG. 2 is a perspective view of a structure including the device shown in FIG. 1 and a crank lever (26).

Other features, although not shown, include a generator attached and a ramp like a regular bicycle, a structure that allows the chair to slide back and forth, a structure that bends from the joint between the front and rear wheels, and a structure that can be folded or detached. It is possible to provide various structures, and others are arbitrary.

(G) Effects of the Invention The device of the present invention can eliminate lateral slippage of a bicycle chain, and does not apply excessive force such as twisting, so it has a remarkable effect of preventing wear and tear on the chain. Furthermore, by attaching a crank lever, a three-wheeled wheelchair has the effect of making it easier to travel uphill, which was difficult with conventional manual wheelchairs. Furthermore, the force can be freely changed and the speed can be controlled using a crank lever that extends and retracts up and down.The present invention is effective not only for wheelchairs but also for bicycles for leisure and competition use.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a cylinder 1 according to an embodiment of the present invention. FIG. 2 is a perspective view of the cylinder 2 according to the embodiment of the present invention. FIG. 3 is a partially sectional perspective view of the crank lever of the present invention. FIG. 4 and FIG. 5 are explanatory views of the movement of the embodiment cylinder 1. The arrow indicates the direction of operation of the gear lever and the direction of rotation of the gear. FIGS. 6 and 7 are explanatory views of the movement of the embodiment cylinder 2, and arrows indicate the operating direction of the gear lever and the rotating direction of the gear. FIGS. 8 and 9 are diagrams showing changes in operation due to changes in the extension/contraction state of the crank lever. FIG. 1o is a perspective view of an embodiment of a three-wheeled bicycle using a first embodiment device and a third embodiment crank lever (26) of the present invention. FIG. 11 is a perspective view of an embodiment of a three-wheeled bicycle using the second embodiment device and the third embodiment crank lever (26) of the present invention.

Claims (1)

[Claims] 1. The crank gear is rotated forward and backward by the forward and backward movement of a crank lever fixed to the crank gear, and two parallel free gears are used to transmit the power to the wheel drive shaft. A manual bicycle drive device characterized in that it is connected to a wheel drive shaft provided by a parallel two-speed bicycle chain via another gear. 2. Two parallel free gears (1) (2) to the wheel drive shaft
be installed at appropriate intervals. A crank gear (4) provided with a crank lever (3) is pivotally supported so as to be located in line with the free gear (1). Next, intermediate gears (5) are fixed in parallel to each other in line with the free gears (1) and (2), and between the free gears (1) and (2) and the crank gear (4). (6) is rotatably supported. Connect the free gear (1) and crank gear (4) with a bicycle chain (7), at this time bending it over the intermediate gear (5) so as to touch the outer circumference of the bicycle chain (7). . A free gear (2) and an intermediate gear (6) are connected with a bicycle chain (8). A manual bicycle drive device according to claim 1, configured as described above. 3. To the wheel drive shaft, two parallel free gears (11) (
12) are installed at appropriate intervals. Two crank gears (14) and (15) fixed on the same shaft are provided with crank levers (13) so as to be located in line with free gears (11) and (12), respectively. Next, free gear (11) and crank gear (14)
An intermediate gear (16) is rotatably supported so as to be located on the same line between the two. A rotatable rear gear (17) located on the same line as the free gear (11), intermediate gear (16), and crank gear (14) is pivotally supported so as to be located behind the free gear (11). Connect the bicycle chain (18) to the rear gear (17) so that the free gear (11) contacts the outer circumference of the bicycle chain (18) and is bent between the rear gear (17) and the intermediate gear (16). ), the free gear (11), the intermediate gear (16), and the crank gear (14). Also, connect the bicycle chain (19) to the free gear (12).
) and the crank gear (15). A manual bicycle drive device according to claim 1, configured as described above. 4. A crank lever (26) having a grip part (25) at the tip of a pipe (23) (24) with a built-in telescopic sliding spring (22) having an air hole (21) at the top and moving up and down. 1. The manual bicycle drive device according to 1.