JP3135088U - Bicycle on flat road - Google Patents

Abstract

A high-powered bicycle having independent drive systems for a flat road and an uphill road in a single bicycle is provided.
In order to run a bicycle lightly, the chain gear on the pedal side may be made smaller and the rear wheel side larger, but it is necessary to step on the pedal quickly. The bicycle of this invention is a combination of four bevel gears on one pedal shaft, and when the rotation of one of them is forcibly stopped, the opposite gear rotates twice. With half the number of teeth of a chain gear, the pedal can be used to transmit a strong force to the rear wheels even if the number of revolutions is normally stepped on. Two systems for flat roads and uphill roads on the left and right sides of the bicycle The biggest feature is that when the chain is continuously suspended, the bevel gear for the uphill road is stopped, the vehicle runs on the flat road, and the flat road is stopped if necessary.
[Selection] Figure 6

Description

  This invention relates to a driving device in a bicycle.

  Conventional bicycles increase the force applied to the pedal if they are able to run faster, but on the other hand, if they are driven lightly, the speed will be slower.

Problems that the device tries to solve

  In order to solve the above contradiction, one bicycle has two different driving functions for flat roads and uphill roads, and is intended to provide a bicycle that can be climbed easily and easily on the uphill roads. It is.

Means for solving the problem

  In order to achieve the above object, the bicycle of this invention has a pedal installed at the same position as the conventional bicycle, and the consumption of the force applied to the pedal is minimized by a combination of four bevel gears on the pedal shaft. The speed of the chain on the pedal side is increased by giving a strong and quick rotation, and a chain gear with one-half the number of teeth is possible compared to the conventional gear. It tells the rear wheels.

The biggest feature of this device is that in the conventional technology, which is the difference in how the force is transmitted from the conventional technology, all the chain gears fixed to the pedal shaft from the chain gear stretched to the rear wheel chain gear are all It is entrusted.
In this device, as mentioned above, the force applied to the pedal uses the pedal shaft as a fulcrum and makes full use of the properties of the four bevel gears at the midpoint of the pedal (details will be described in detail in detail). When one of the gears stops rotating, the other bevel gear rotates twice.
One of the features is that one side is always stopped by using this, and there are two independent drive systems for the flat road and the uphill road.

The double rotation of the gear according to this device will be described.
Cubic metal fittings named protrusion metal fittings are fitted and fixed to the pedal shaft of the drive device of the invention, and start-up gears are pivotally supported at both ends of the metal protrusions, and left and right side-shaft shapes are provided on both left and right sides of the metal protrusions. A gear is rotatably supported on the pedal shaft, and meshed with the start-up gear, and a cylindrical bracket is fitted between the projection bracket and the left and right cage gears so that each gear meshes at the best position. Fixing and normal rotation are obtained, and when the pedal shaft is rotated, the protruding metal fitting fixed to the pedal shaft also rotates.
In this projection metal fitting, the starting bevel gear on which the starting bevel gear is rotatably supported starts to rotate according to the teeth of the stopped gear, and the other unstopped bevel gear is rotated one more turn. In other words, the bevel gear rotates twice by one rotation of the pedal.

Effect of device

The drive device of this invention explains why the consumption of force applied to the pedal is low.
For the force applied to the pedal, the pedal shaft is the fulcrum and the pedal is the starting point of the force.
The distance between the two is the length of the pedal arm, and there is an activation bevel gear at the midpoint of the pedal arm, and it can be seen that the right and left bevel gears meshing with the activation bevel gear are the size of the same gear.
For this reason, it turns out that all the fulcrums are on the same pedal axis.
In this way, the force applied to the pedal consumes only the force consumed for the rotation of the starting bevel gear and one of the freely rotating gears, and the rest is the driving force.
Moreover, since it rotates twice by one rotation of the pedal, it can be reduced to one-half of the conventional chain gear. If the number of teeth of the chain gear is set to 20, it is the same as 40 gears rotating by one rotation of the pedal.
In addition, the force applied to the pedal has nothing to do with the size of the right and left bevel gears, so it is possible to further reduce the size and weight.

Inventive embodiment

The description will be given with reference to the drawings.
FIG. 1 is an explanatory view of the form of each disassembled part of the present invention, and FIG. 6 is an assembly plan view of FIG.
On the pedal shaft (1) (a hole through which the pedal shaft passes is provided on the rectangular solid side face with the protruding metal fittings), the starting bevel gear (5a5b) is rotatably supported.
A chain gear (7) is fixed to the back surface of the right shade gear (4), and the rotation control arm (10) is not hindered by the chain (28) (see FIG. 9) that is engaged with the chain gear (7). Secure with a gap.
Also, the left shade gear (3) (see FIG. 2) is provided with a protrusion (12) on the back surface, and a vise (13) attached to the chain gear (6) bites into this protrusion and the left shade gear (3 The notches (12a) for transmitting the rotational force of) to the chain gear are cut at a plurality of equal intervals obliquely in the traveling direction, and the rotation control arm (9) is fixed.
On the chain gear (6), a thick disc (11) that receives the strong rotation applied to the stable rotation of the gear and the vise (13) is closely attached and reinforced, and the spring-loaded vise (13) is pivotally supported. To do. (See Figure 1)
The cylindrical metal fitting (8) is a metal fitting for fixing the meshing condition of each gear at the best position, and is inserted between the gears.

The assembly sectional view of FIG. 1 is (FIG. 6).
A pedal shaft (1) is pivotally supported on the side wall of a housing (case) (26) that houses the sensitive portion of the drive device, and the housing (26) has a chain (27 for uphill roads and flat roads). ) Open the hole for (28) in two places on the top and bottom, four places in total, wire (20) between the mode switch lever (25) on the outside of the housing, the switch lever By pushing, the wire (20) is pulled and the mode is switched.

In the above-described uphill road and flat road mode switching device, the drive device of the present invention is normally in the flat road mode, and the uphill road mode is maintained only while the mode switching lever (25) installed on the handle is being pressed. Instead, release the lever to instantly return to the original flat road mode.
The mode switching device (FIG. 3) is illustrated because the structure is easy to explain in the device diagram of the present invention at the time of trial production.
However, it can be seen that the force from the stopped bevel gear is higher than expected, and as shown in FIG. 7, the structure that is replaced with a simple and powerful mode switching device is basically ( The same as FIG.

The drive device of this device is as described above, and the chain gear on the rear wheel side connected thereto will be described.
The right road mode uses the gears of the prior art as they are. The left-side uphill road mode chain gear has a large number of teeth and a large diameter (see FIG. 4), and is fixed to the brake drum so as not to interfere with the brake operation and integrated with the rear wheel.

  FIG. 9 is a partial plan view of a bicycle in which the driving device of the present invention is implemented. From the above-mentioned driving device, the bicycle has a completely different driving system, with the uphill road system on the left side and the flat road system on the right side. Is shown.

  The ratio of the number of teeth of the chain gear of the driving device and the chain gear of the rear wheel is 1 to 0.8 in the flat road mode and 1 pair in the uphill mode when the number of teeth of the chain gear of the driving device is 1. When set to 2, in the flat road mode, the rotation of the rear wheel is 2.5 rotations by one pedal rotation, and in the uphill road mode, the rotation of the pedal is one rotation of the rear wheel.

Effect of device

  The force applied to the pedal does not disappear so much, and the pedal-side chain gears (6) and (7) rotate twice by one rotation of the pedal, making it possible to reduce the number of teeth to one half of the conventional number. The flat road is light and fast, and you can easily climb the slopes that you could not climb until now.

  Explanatory drawing of the form of each component of the disassembly of the drive device of this invention.   The back form figure of the left shade gear (3) of FIG.   It is explanatory drawing of a mode switching apparatus, and there exists a point of power shortage in an actual switching apparatus.   It is the figure which attached the chain gear for uphill road to the brake drum.   Mode switching lever attached to the handle.   It is an assembly sectional view of FIG. This figure shows that the stopper of the mode switching device has been moved to stop the rotation by the rotation control arm and is in the uphill mode.   It is the figure which attached the mode switching apparatus to the housing which accommodates a mechanism part inside. It is a structure that can withstand a strong force in the switching device that is actually used.   It is a side view of the bicycle which applies the drive device of this device.   FIG. 9 is a partial plan view of FIG. 8.   It is a figure explaining the consumption degree of the force added to the pedal.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pedal shaft 2 Protrusion metal fitting 3 Left shade gear 4 Right shade gear 5a5b Starting shade gear 6 Left chain gear 7 Right chain gear 8 Cylindrical metal fitting 9 Left shade gear rotation control arm 10 Right shade gear rotation control arm 11 Left chain gear reinforcement plate 12 Left cap-shaped gear back protrusion 12a Vise biting notch 13 Vise 14 Left mode switching stopper 15 Right mode switching stopper 16 Stopper switching arm 17 Mode switching wire operation auxiliary spring 18 Always flat road mode base spring 19 Mode switching bracket 20 Wire 21 Handle 22 Brake drum 23 Chain gear 24 for uphill road Rear wheel axle 25 Mode switch lever 26 Mechanism housing housing 27 Chain for climbing plate 28 Chain for flat road 29 Spoke 30 Rear wheel 31 Brake 32 Pedal

Claims (1)

  Bicycles with independent drive systems for uphill and flat roads on both sides of the bike

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