JPH02235B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bicycle electric transmission device that is attached to a bicycle equipped with a gear type transmission device, and particularly to one in which the speed change operation is performed electrically by forward and reverse rotation of a motor. During the shift operation, an alarm is used to notify the driver that a gear shift operation is in progress, so that the driver may forcibly rotate the crank gear during the shift operation, thereby damaging the gear type transmission device, etc. Concerning things that should not have happened.

That is, as an electric transmission device for bicycles of this kind, the applicant has proposed, for example, Japanese Patent Application No. 51-30196 (Japanese Unexamined Patent Publication No. 52-112932).
There is something like the one proposed as (No.). However, with this system, after the gear shift switch is turned on, the gear type transmission is electrically operated to change the chain to the change gear, but since the time required for the change is not known, the time required for the change is often If the pedal is depressed and the crank gear is forced to move, there is a risk that the chain may come off from the chain gear, or the chain gear may be overloaded and the gear type transmission may be damaged.

The present invention was made to prevent such drawbacks, and will be described below with reference to embodiments shown in the drawings.

Reference numeral 1 denotes a bicycle, which has a gear type transmission consisting of five-stage change gears 3A, 3B, 3C, 3D, 3E installed on a rear wheel 2 and a guide device 5 that can be moved by pulling or loosening a wire 4. Device 6
The guide device 5 is connected to the crank gear 8 which is rotated by driving the pedal 7 with the foot.
The driving force is transmitted to any of the change gears 3A, 3B, 3C, 3D, and 3E via a chain 9 that is moved in stages, and the number of gears is changed from 1 to 5 in a well-known configuration. .

The bicycle electric transmission device of the present invention includes a wheel speed sensor 12 installed on the front fork 11 of the front wheel 10 of the bicycle 1, a crank gear rotation sensor 13 installed on the body pipe near the crank gear 8, and a central portion of the handlebar. Control box 1 installed in
4 and the electric transmission mechanism 1 attached to the cargo bed stay.
It consists of 5 and.

Next, each part will be explained. First, the wheel speed sensor 12 has a built-in Hall element, and outputs a wheel rotation pulse when a magnet 12a attached to a spoke of the front wheel 10 passes through the sensor 12. In addition, the crank gear rotation sensor 1
3 also has a built-in Hall element, and the crank gear 8
The magnet 13a attached to the back side is the sensor 13.
Outputs a crank gear rotation pulse when passing through.

Further, the electric transmission mechanism 15 is composed of a forward/reverse rotating motor 16, a reduction gear 17, a winding drum 19 having a gear position sensor 18, and a battery power source 20. By rotating the wire 16 in forward and reverse directions, the wire 4 is wound around or unwound onto the winding drum 19, and the wire 4 is pulled or loosened in stages. 5, and thereby the chain 9 is changed to any one of the chain gears 3A...3E, and the gear position sensor 18 detects which of the chain gears 3A...3E the chain 9 is hooked to. The number of gears is detected and transmitted to the electronic circuit in the control box 14. The gear position sensor 18 is mounted on a fixed plate 2 fixed to the reduction gear box inside the control box 14, as shown in FIG.
1 and the first, second,
Third and fourth contact pieces 22X, 22Y, 22Z, 22W
and a rotating plate 23 made of a printed circuit board coaxially supported by the winding drum 19. The entire surface of this rotating plate 23 is a conductive surface 24 made of a copper foil plate, and the first, second, and third contact pieces 2
2X, 22Y, and 22Z, the guide device 5 connects the first stage chain gear 3A to the fifth stage chain gear 3A to the fifth stage.
Insulating parts 25, 25, . . . are provided by etching so that a corresponding 3-bit binary code can be obtained when the gear stops at a position opposite to the change gear 3E, that is, from the first gear position to the fifth gear position. Furthermore, the fourth contact piece 22W is always in sliding contact with the conductive surface 24, so that the conductive surface 24 is supplied with power from the fourth contact piece 22W, and as a result, the first, second, and third contact pieces 22X, When 22Y and 22Z slide on the guiding surface 24, a high level signal (H state) is obtained, and when they slide on the insulating parts 25, 25..., a low level state (L state) signal is obtained. Therefore, from the first, second, and third contact pieces 22X, 22Y, and 22Z, at the stop position <A position> at the first gear stage (H, L, L), the second gear stage number is At the stop position <B position> in the gear stage (L, H, L), the number of gear stages is 3.
At the stop position <C position> in the step (H, H,
L), the detection signal is (L, L, H) at the stop position <D position> at the 4th gear stage, and (H, L, H) at the stop position <E position> at the 5th gear stage. It is becoming possible to obtain it.

Next, in the control box 14, reference numeral 14a is a display/operation surface, and on this display/operation surface, 26 is a 4-digit 8-segment numerical display for displaying the traveling speed, crank gear rotational speed, or number of gears; , 29, and 30 are speed display lamps, distance display lamps, time display lamps, and crank gear speed display lamps that indicate whether the contents displayed on the numerical display 26 are traveling speed, traveling distance, traveling time, or crank gear rotation speed. So, 3 more
Reference numerals 1, 32, and 33 are gear up indicator lamps, gear appropriateness indicator lamps, and gear down indicator lamps, which will be described later. Furthermore, on this display operation surface 14a,
34 is a start/stop key switch, 35 is a speed key switch, 36 is a distance key switch, 3
7 is a time key switch, 38 is a time reset key switch, 39 is a crank gear rotational speed key switch, 40 is a driver switch for inputting whether the driver is a child or an adult, and 41 is a male driver. 42 is a terrain switch that inputs whether the driving situation is uphill, flat, or downhill, and 43a, 4
3b, 43c, 43d, 43e connect the guide device 5 of the gear type transmission 6 to five-stage change gears 3A, 3.
A first one that instructs which of B, 3C, 3D, and 3E should be opposed, that is, which gear number should be set.
2nd, 3rd, 4th, 5th gear command key switch,
44 indicates the number of gears on the 8-segment numerical display 2.
6 is a gear recall key switch, and 45 is a power switch.

The control box 14 has a built-in electronic circuit including a microcomputer device 46 for calculation.
In the storage section of the control box 14, a travel speed range (described later) corresponding to each of the five change gears, that is, the number of gears, is input and stored in advance by the setting switches 47, 47, . . . on the rear surface of the control box 14.
Furthermore, the processing procedure shown in FIG. 10 is also stored. Further, on the display operation surface 14a, 4
Reference numeral 8 denotes a notification buzzer which produces a constant or intermittent sound using an oscillator included in the electronic circuit.

Then, the driver inputs his/her own information using the driver switch 40 and gender switch 41, and inputs usage information using the terrain switch 42, and if he/she wants to know the driving speed, presses the speed key switch 35. . Then, the wheel rotation pulses from the wheel speed sensor 12 are counted and processed by an electronic circuit to digitally display the running speed on the numerical display 26, and the speed display lamp 27 is turned on, and then the processing procedure shown in FIG. 10 is started. Therefore, the preset traveling speed range for the currently set number of gears is compared with the measured value of the current traveling speed, and if the current traveling speed is greater than the maximum speed of the set traveling speed range, the gear up display lamp is displayed. 31 to prompt the driver to increase the number of gears, and on the other hand, when the current travel speed is lower than the lowest speed in the set travel speed range, the gear down indicator lamp 33 is lit to prompt the driver to decrease the number of gears. When the current traveling speed is within the set speed range, the gear appropriateness display lamp 32 is lit to indicate that the correspondence between the traveling speed and the number of gears is appropriate. When any of the fifth gear command key switches 43a to 43e is pressed, the notification buzzer 48 first emits a certain sound for a certain period of time in response, and then commands the motor 16 of the electric transmission mechanism 15 to rotate forward or backward. give a signal,
When the gear position sensor 18 outputs a binary code corresponding to the specified number of gears, the motor 16 is stopped and the gear type transmission 6 is maintained at the specified number of gears. The motor 48 emits an intermittent sound to inform the driver that the motor 16 is in operation, that is, it is in the process of switching to any of the change gears in the chain 9. After the motor 16 stops, the notification buzzer 48 sounds continuously for a certain period of time. It is designed to emit a sound to notify the driver of the end of the operation.

Next, if the user wants to know the rotation speed of the crank gear 8, the crank gear rotation speed key switch 39 is pressed. Then, the crank gear rotation sensor 1
The crank gear rotation pulses from 3 are counted and processed by an electronic circuit, and the crank gear rotation speed is digitally displayed on the numerical display 26, and a crank gear speed display lamp 30 is lit.

Further, when the time key switch 37 is pressed, the usage time is displayed on the numeric display 26.

In addition, when the driver wants to manually change the number of gears, the first to fifth gear command key switches 43a to
If any one of the gears 43e is pressed, the gear position is switched preferentially to the pressed gear position.

Next, a method of setting the set speed range corresponding to each of the above-mentioned gear positions will be described. This is a system that determines the number of gears relative to the riding speed in order to drive the bicycle most efficiently and without fatigue, depending on the rider and the driving situation, where X is the number of gears and _V1 is the maximum speed. , with V ₂ as the lowest speed V ₁ = aX (X = 1, 2, 3, 4) V ₂ = a (X-1) - b
(X=2, 3, 4, 5, but when V ₂ < 0, V ₂
= 0) and is stored in the storage section of the microcomputer device 46.By inputting these constants a and b using the setting switches 47, 47, etc., the traveling speed range corresponding to each gear stage number can be determined. For example, when a=10 and b=5, the relationship between the traveling speed and the number of gears is as shown in FIG. Further, in the processing procedure diagram shown in FIG. 10, a correction constant C is input from setting switches 47, 47, etc. in order to adjust the traveling speed range depending on the driver and driving conditions. Accordingly, the value of a changes depending on the setting conditions of the driver and the driving situation, and more appropriate conditions can be set.

The bicycle electric transmission device of the present invention is as described above in detail, and in particular, the bicycle electric transmission device selectively switches and transmits the driving force from the crank gear to any one of the multi-stage change gears installed on the wheels. When the motor is rotated in the forward or reverse direction, the chain is changed to any of the change gears, and during this change-over operation, it is equipped with a notification means to notify that the change is in progress. This notification means allows the driver to clearly know that a gear shift operation is in progress, and therefore prevents the driver from accidentally rotating the crank gear forcibly during a gear shift operation, disengaging the chain from the change gear, or using a gear type transmission. It is possible to obtain something that will not be damaged and can therefore be used for a long period of time.

[Brief explanation of drawings]

The drawings all relate to embodiments of the bicycle electric transmission according to the present invention; FIG. 1 is an overall view of the bicycle electric transmission, FIG. 2 is a configuration diagram of a gear type transmission, and FIG. 3 is a configuration diagram of a crank gear rotation sensor. , Fig. 4 is a diagram of the relationship between the control box and electric transmission mechanism, etc., Fig. 5 is a configuration diagram of the gear position sensor, and A is a diagram of the rotating plate.
B is a diagram of the fixed plate, C is an overall relationship diagram, Figure 6 is a back view of the control box, Figure 7 is a conceptual diagram of the electronic circuit,
FIG. 8 is a diagram of the main part of FIG. 7, FIG. 9 is a diagram showing the relationship between the traveling speed and the number of gears, and FIG. 10 is a processing procedure diagram when selecting the traveling speed display. 3A, 3B, 3C, 3D, 3E... Chain gear, 8... Crank gear, 9... Chain, 12
...Wheel speed sensor, 13...Crank gear rotation sensor, 14...Control box, 15...Electric transmission mechanism, 16...Forward/reverse rotation motor, 48...
Notification buzzer.

Claims (1)

[Claims] 1.In a device attached to a bicycle that selectively switches and transmits the driving force from a crank gear via a chain to any one of multiple chain gears installed on the wheel, the forward and reverse rotation of the motor can cause any of the chain gears in the chain to be transmitted. This electric bicycle transmission device changes gears to the other gear, and uses a notification means to notify that the shifting operation is in progress.