JPH0648365A - Bicycle driven by subsidiary motor - Google Patents

Abstract

PURPOSE:To assist human power travel by rotating automatically bicycle wheels by driving a motor only when pedaling is done. CONSTITUTION:An operation circuit is closed through an operation device that is linked to an upper side chain 8, only when force is added to a pedal 20 and the upper side chain 8 is strained and a wheel 1 rotation motor 2 is driven. The operation device consists of a lever 9 provided lyingly on the upper surface of the center vicinity of the upper side chain 8 and an erect operation rod 10 at which the lever 9 is fixed, and the operation rod 10 is moved up and down according to the tension degree of the chain 8, and the operation circuit is closed/opened. The operation circuit is made up by the series connection of a motor 2, a battery 7 and a limit switch to close/open the circuit by means of the operation device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power assisted bicycle. In particular, the present invention relates to an electric assisted bicycle that has an operating circuit that closes only when a person pedals a pedal, and the motor is driven only at that time to automatically rotate the wheels to assist human-powered traveling.

[0002]

2. Description of the Related Art Conventionally, various electric bicycles have been proposed in which a pedal chain is rotated by a motor for traveling, but they have not been practically used due to drawbacks such as short traveling distance. As far as the applicant knows, no proposal has been made for an electrically assisted bicycle that assists manpower travel.

[0003]

[Problems to be Solved by the Invention] When riding a bicycle and hitting a slope with a steep slope or a long climbing distance, the driver is tired of pedaling and pushes the bicycle on foot. Everybody has experienced that it will start to raise. In such cases, it would be convenient if the bicycle had auxiliary power to climb the slope.

The present invention has been made paying attention to this point, and the operating circuit is closed only when the pedal is pedaled, and the motor is driven only at that time so that the wheels are automatically rotated so that the human power is reduced. The purpose is to solve the above problems by assisting the running.

[0005]

The electric power assisted bicycle according to the present invention closes the operating circuit through the operating device interlocking with the upper chain to rotate the wheels only when the upper chain is strained due to the force applied to the pedal. It is characterized by assisting manpower running by driving a motor.

[0006]

In the power-assisted bicycle according to the present invention, the motor is driven to automatically rotate the wheels only when the vehicle is manually driven, so that the pedal can be easily pedaled to increase the traveling speed on a flat ground. Further, even on a slope having a steep slope or a long climbing distance, it is possible to easily pedal and easily travel.

Further, in the electric assisted bicycle according to the present invention, the operating circuit is closed to drive the motor only when the pedal is pedaled and the upper chain is tensioned, so that waste of electricity is prevented and high efficiency is achieved. Can be used for

[0008]

An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is an overall view of the power assisted bicycle 18. The gear 3 is attached to the shaft of the motor 2 fixed above the front wheel 1.
Is attached. A hub 4 is attached to the shaft of the front wheel 1. Chain belt 5 between gear 3 and hub 4
Is installed. The hub 4 may include an internal transmission.

A battery 7 (for example, a 12V automobile battery) for driving the motor 2 is mounted on the rear loading platform 6.

As shown in FIG. 2a, the chain cover 11
A U-shaped notch is provided near the center of the upper chain 8 to partially expose the upper chain 8.

An operating device 14 is provided in this notch. The actuating device 14 comprises a plate lever 9 and an actuating rod 10. The plate lever 9 is preferably a curved plate rather than a flat plate, and is in contact with the upper portion of the upper chain 8 such that its center portion lies on the upper surface of the upper chain 8. As shown in FIG. 2C, a connecting rod 9a is fixed to the plate lever 9 by welding or the like, and the connecting rod 9a is fixed to the operating rod 10. Operating rod 1
0 is accommodated in the fixed cylinder 13 and can move up and down in this. That is, as shown in FIG. 2b, when the plate-shaped lever 9 moves up and down in accordance with the up-and-down movement of the upper chain 8, the connecting rod 9a is moved within the slit 13a provided in the fixed barrel 13.
Moves up and down, and consequently the operating rod 10 moves up and down. Figure 2a
As shown in, the lower portion of the fixed cylinder 13 is fixed to one end of the fixed leg 12 (in the drawing, fixed with bolts). The fixed leg 12 is fixed to the chain cover 11 by welding or the like.

A limit switch 17 is held near the center of the fixed leg 12 and near the tip of a supporting arm 15 which is erected substantially parallel to the actuator 14. Limit switch 17
The contact point 16 is disposed at a predetermined distance from the tip of the operating rod 10.

The motor 2, battery 7 and limit switch 17 are connected in series as shown in FIG.
Is formed. In the drawing, S is a main switch, which is used for safety when the vehicle is driven by full power or when the speed is too high and dangerous.

All bicycles have chains attached with some margin. As a result, when a person pedals, the upper chain becomes tense and rises. When you stop rowing, the tension on the upper chain is released and it loosens due to its own weight. The present invention utilizes this principle. When the user rides on the electric assisted bicycle 18 of the present invention and pedals the pedal 20, the upper chain 8 is tensioned, and the operating rod 10 is pushed upward through the plate-shaped lever 9 and the connecting rod 9a. When the tip of the operating rod 10 pushes the contact 16, the limit switch 17 operates to close the operating circuit 19, and the motor 2 drives to rotate the front wheel 1. When the pedaling of the pedal 20 is stopped, the upper chain 8 is slackened so that neither the plate lever 9 nor the operating rod 10 can be pushed up, so that the operating circuit 19 is opened and the motor 2 is not driven. That is, the front wheels 1 rotate only while the person is biking to assist the human-powered traveling.

Thus, the electric assisted bicycle 1 of the present invention
In No. 8, since the motor 2 is driven to rotate the front wheels 1 during traveling, the traveling speed can be increased on a level ground, and the slope is steep and the climb distance is long. However, the pedal 20 can be easily pedaled to easily travel.

In the electric assisted bicycle 18 of the present invention, the operating circuit 19 is closed to drive the motor 2 only when the pedal 20 is pedaled and the upper chain 8 is tensioned. Highly efficient use can be measured.

In the above embodiment, the upper chain 8
The operating device 19 is equipped with a lever 9 that comes into contact with the upper surface near the center and an operating rod 10 that fixes the lever 9 near the center. An actuator other than the actuator 14 may be used as long as it has a function capable of closing a circuit. Further, although the front wheels are driven in the above-described embodiment, the rear wheels may be driven. The lever may have a rod shape as well as a plate shape.

[0019]

Since the present invention has the above-mentioned structure, it has the following effects. That is, (1) since the motor is driven to rotate the wheels during traveling, the petal can be easily rowed and easily traveled regardless of the flat road.
(2) Since the motor is driven only when the pedal is pedaled and the upper chain is tensioned, it is possible to use electricity efficiently. (3) Since the motor is driven to rotate the wheels, the traveling speed can be increased.

[Brief description of drawings]

FIG. 1 is a side view of an electrically assisted bicycle according to the present invention.

FIG. 2 is a simplified view of an operating device, (a) is a front view, (b)
Is a perspective view and (c) is a sectional view.

FIG. 3 is an operation circuit diagram.

[Explanation of symbols]

 1 Wheel 2 Motor 8 Chain 9 Lever 10 Actuating Rod 14 Actuating Device 17 Limit Switch 18 Electric Assisted Bicycle 19 Operating Circuit 20 Pedal 21 Main Switch

Claims (3)

[Claims] 1. The actuating circuit (19) is closed via an actuating device (14) interlocking with the upper chain (8) only when a force is applied to the pedal (20) to tension the upper chain (8). An electric power-assisted bicycle (18) characterized by assisting human-powered traveling by driving a wheel (1) and a rotation motor (2). 2. An actuator (14) comprises a lever (9) provided so as to lie on the upper surface near the center of the upper chain (8), and an upright actuating rod (10) to which the lever is fixed. The power-assisted bicycle (1) according to claim 1, wherein the operating rod (10) moves up and down according to the tension of the chain (8) to close and open the operating circuit (19).
8). 3. An operating circuit (19) comprising a motor (2), a battery (7), and a limit switch which is closed and opened by an operating device (14) in series connection. Electric assisted bicycle (18).