JPH035520Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a water propulsion device for use in amphibious bicycles, motorized amphibious bicycles, foot-pedal leisure boats, and the like.

Previously, the applicant proposed a propulsion device of this type in which a rotating shaft is arranged at approximately the same level as the water surface level and orthogonal to the direction of propulsion, and a rotating plate is mounted on the rotating shaft so that the surface of the rotating plate is obliquely intersecting the axis of the rotating shaft. (Utility Application No. 58-102618). The operation of this propulsion device is performed as shown in FIGS. 1 and 2.

That is, in the figure, a indicates a rotating shaft, and b indicates a rotating plate connected to the rotating shaft a with its plate surface diagonally crossing the axis. They are arranged perpendicularly to the direction of arrow X in FIG.

Here, assuming that the rotary plate b is viewed from the rear in the propulsion direction and is at a rotational position of 0° when it is in a rightward tilted position upward and to the right, the rear view shape at each rotational position of 90°, 180°, and 270° is shown. The plan view shape is shown in Figures 1 and 2.
As shown in the figure (the part that is submerged in water is shaded), in the rotation range of 0° to 180°, water is pushed backward by the right side c of the rotating plate b and propelled. A force is generated, and the propulsive force peaks at the 90° position where the rearward projected area of the right side surface c is maximum, and at the 180° position, the rotary plate b tilts upward and tilts to the left. Then, in the subsequent rotation range of 180° to 360°, the water is pushed backward by the left side d of the rotary plate, and the water is pushed back at the 270° position where the rearward projected area of the left side d is maximum. The propulsive force reaches its peak, and by repeating the above steps, the alternating web action of the right side c and the left side d of the rotary plate b produces a continuous propulsive force, and by reversing the rotating axis a, the above is achieved. Propulsion in the opposite direction is obtained.

However, since the rotating plate b is a flat disc,
When the water is pushed backward by rotation, slippage occurs between the surface of the rotating plate and the water, which has the disadvantage that sufficient propulsive force cannot always be obtained.

The purpose of the present invention is to eliminate these drawbacks and provide a propulsion device in which the rotating plate can reliably push out water and obtain strong propulsive force. A rotating shaft is arranged at substantially the same level and perpendicular to the propulsion direction, and a rotating plate is connected to the rotating shaft so that its central axis is obliquely intersecting with the rotating shaft, and from the center of the rotating plate to the periphery. The reason for this is that an odd number of propulsion blades that gradually protrude are arranged on both sides of the rotary plate at equal angles and shifted by 180 degrees between each side.

The following is an application of the device of the present invention to an amphibious bicycle.
An embodiment will be described with reference to FIGS. 3 to 7.

Reference numeral 1 indicates a vehicle body, and the vehicle body 1 includes left and right float bodies 1a, 1a, a rectangular flat plate-shaped float body 1b that connects the front parts of these bodies, a fender 1c that connects the rear part, and a protrusion in the center surrounded by these. 1e
The container body 1d is made of a material such as engineering plastic.

2 shows a rear wheel when traveling on land and a rotary plate which serves as a propulsion body when traveling on water, and the rotary plate 2 is shown in FIGS.
As shown in the figure, it consists of both side disc parts 2a, 2a and a tire 2b interposed and fixed between these peripheral parts, and each of these both side disc parts 2a, 2a has three propulsion blades 2c...2c arranged at equal angles, that is, 120 degrees. They are arranged at intervals of 180 degrees between the disks 2a, 2a on both sides, and each of these propulsion blades 2c has a triangular cross section as shown in Fig. 7, extending from the root to the tip. Accordingly, it is formed to gradually increase in size, that is, to protrude, and the root portion is located at the center of the side disk portion 2a, and the tip portion is located at the peripheral edge of the side disk portion 2a.
Also, at the center of these both side disk parts 2a, 2a, there are mutually
Elongated holes 13, 13 having a phase difference of 180° are bored, respectively, and the rotary plate 2 is connected to a rotary shaft 3 rotatably pivoted between the rear ends of the inner surfaces of both the float bodies 1a, 1a. are pivotally supported in the elongated holes 13, 13.

Reference numeral 4 denotes a crankshaft which is rotatably pivoted on the central protrusion portion 1e and has pedals 5, 5 at both ends; 6 is a transmission shaft pivoted between the middle portions of the inner surfaces of the float bodies 1a; 7a; 7b and 7c are sprockets fixed to the transmission shaft 6, 7d is a sprocket fixed to the rotating shaft 3, and 8a is the sprocket 7a.
and 7b, and 8b is a chain that is stretched between the sprockets 7c and 7d. By stepping on the pedals 5, 5 and rotating, the sprockets 7a to 7d and the chains 8a, 8b are rotated.
The rotary plate 2 is rotated via the rotary plate 2.

9 is a handle; 9a is a handle shaft pivotally connected to a bearing body 9b protruding from the front end of the central vehicle body portion 1a;
10a, 10a are front wheel axles pivotally connected to both side parts of the float body 1b, 10, 10 are front wheel axles 1
The front wheels are pivotally supported at the lower ends of 0a and 10a, 11a is a sprocket fixed to the lower end of the handle shaft 9a, and 11b and 11b are the front wheel shafts 10a and 10.
A sprocket 12 is fixed to the upper end of the sprocket 11a, 11b, and 11b. 11b, 11b, chain 12, etc., and rotate together to perform steering while traveling on land or water.

Thus, as shown by the solid line in FIG. 4, the rotating plate 2, that is, the rear wheel, is locked to the rotating shaft 3 by means such as the hook 14, so that it can travel on the ground G in a state perpendicular to the rotating shaft 3. 14 is released to make the rotary plate 2 swingable within a certain angle with respect to the rotary shaft 3 in the long holes 13, 13, and
When the part is placed in water and rotated, the rotary plate 2 becomes oblique to the rotary shaft 3 due to water pressure, and the intermediate position of the float bodies 1a, 1a becomes the water surface W, allowing the float bodies to travel on water.

Here, as explained in the propulsion device of the previous application, the maximum propulsive force is generated between the two surfaces of the rotary plate 2 at rotational positions different by 180 degrees, such as 90 degrees on one side and 270 degrees on the other side. This maximum propulsive force is further increased by the water displacing action of the inclined surfaces of the propulsion vanes 2c...2c, which are arranged 180 degrees apart from each other between the disk portions 2a, 2a. Further, since each propulsion blade 2c is formed to gradually protrude from the center of the rotating plate 2, which contributes little to the propulsive force, toward the peripheral portion, which contributes the most to the propulsive force, the propulsive force can be efficiently obtained.

Also, when the propulsion blades 2c...2c sequentially enter or exit the water due to the rotation of the rotating plate 2, these propulsion blades 2c...2c
Since an odd number of blades 2a and 2a are arranged at equal angles and shifted by 180 degrees on both sides, on each surface of the rotating plate 2, a plurality of propulsion blades 2c...2
c does not go in and out of the water surface at the same time, and the influence of changes in resistance occurring on the water surface on the rotary plate 2 is dispersed, resulting in less rotational unevenness and smooth rotation.

Incidentally, in the above embodiment, the both side disk portions 2a, 2a are formed parallel to each other, but the present invention is not limited to this, and they may be formed in a tapered shape as shown in FIG. 8, for example. Forming the both side disc portions 22a, 22a in a tapered shape is intended to further increase the propulsion force, as explained in the specification of the applicant's previous utility model registration application (Utility Model Application No. 183364/1982). There is an effect that can be done. In addition, 22 is a rotating plate, 22b is a tire, and 22c
...22c indicates a propulsion blade, and 23 indicates a rotation axis.

As described above, according to the present invention, the propulsion vanes that gradually protrude from the center of the rotary plate toward the peripheral edge are arranged on both sides of the rotary plate, with the positions shifted by 180 degrees between each side. In addition to being able to obtain a smoother and stronger propulsion force than before, the propelling blades are arranged in an odd number on both sides of the rotary plate at an angle and shifted by 180 degrees between each side, so that it can easily reach the water surface. The resistance generated between the two is also dispersed, allowing smooth rotation.

[Brief explanation of drawings]

Figures 1 and 2 are a rear view and a plan view of the rotating plate to explain the operation of the device proposed in the applicant's earlier application, and Figure 3 is an embodiment of the device applied to an amphibious bicycle. Fig. 4 is a plan view with one part cut away, Fig. 5 is a front view of the rotating plate, Fig. 6 is a side view thereof, and Fig. 7 is a perspective view of the propulsion blade. , FIG. 8 shows a side view of the rotating plate of another embodiment. 2, 22... Rotating plate, 2a, 2a, 22a, 2
2a...both side disk parts, 2c, 2c, 22c, 22
c... Propulsion blade, 3, 23... Rotation shaft.

Claims (1)

[Scope of utility model registration request] A rotating shaft is arranged perpendicular to the propulsion direction at approximately the same level as the water surface level, and a rotating plate is connected to the rotating shaft so that its central axis is obliquely intersecting with the rotating shaft, and from the center of the rotating plate. A water propulsion device characterized in that an odd number of propulsion blades that gradually protrude toward the periphery are arranged on both sides of the rotary plate at equal angles and shifted by 180° between each side.