JPS5996086A - Variable speed gear for bicycle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bicycle transmission device that is attached to a bicycle.The present invention relates to a bicycle transmission device that is attached to a bicycle.The present invention relates to a bicycle transmission device that is attached to a bicycle. The present invention relates to a bicycle transmission device that also has a transmission function.

Conventional bicycle manual transmission devices have a wire stretched between the speed change means installed near the rear wheel and a manual lever installed on the handlebar or crotch frame, and the manual lever is used to pull or loosen the wire. He was able to move the guide device of the transmission means and change the chain.

Other electric transmissions include a motor that winds up a wire (91) and unwinds (9) a wire near the transmission means, and changes speed by operating the motor reversibly using a hand switch.

In other automatic transmission devices, a micro combinator selects the optimal number of gears depending on the bicycle speed or crank rotation speed, and a wire is wound around the device to move a guide device to that gear position.

However, with the above-mentioned manual transmission, operating the manual lever requires effort and may be troublesome to operate.

On the other hand, the electric transmission and automatic transmission require a control circuit, a motor, and a power source (mainly a battery), and it becomes difficult to change gears if the battery runs out during use.

Furthermore, with automatic transmissions, it is not possible to shift to the gear position of one's preference, which is also a disadvantage to the driver.
There are times when x is inconvenient.

This invention was made in view of these circumstances,
To provide a bicycle transmission device that can arbitrarily switch between manual shifting and electric shifting.

Hereinafter, the present invention will be explained in detail based on the embodiments shown in the figures.

However, this invention is not limited to this.

(1) shown in Figure 1 is a bicycle, and as shown in Figure 2, it has a 5-speed change gear (3A) (3) installed on the rear wheel (2).
13) (3C) (3D) (3n) , wire (
4A) (4B) and wire (4 people) or (4B)
) has a gear type transmission means (6) consisting of a guide device (5) that can be moved by pulling and loosening the ! The change gear (3A) (313) (ac) (31)) (,3
Transmit the driving force to Arekani in E) and change the number of gears from 1 to 5.
It has a well-known configuration in which it switches in stages.

The electric shift means includes a wheel speed 7-02) equipped with a front brake CIIIK on the front wheel α0 of the bicycle (1), and a crank gear rotation sensor (13+) equipped on a body pipe near the crank gear (8). (!:) It is composed of a control box Cl41 attached to the center part of the handle and an electric transmission unit attached to the cargo bed stay.

The manual shift means 01 has a manual lever 6D. Next, to explain each part of the electric shift means, the wheel speed sensor port 2 has a built-in Hall element and is attached to the spoke of the front wheel αQ. When the p-attached magnet (i 2a) passes through the sensor α force, it outputs a wheel rotation pulse. Further, as shown in FIG. 3, the crank gear rotation sensor OJ similarly has a built-in Hall element, and when the magnet (13a) attached to the back surface of the crank gear (8) passes the sensor (131), the crank gear rotation '4' pulse is output.

Furthermore, as shown in FIG. 4, the electric transmission 4sas is composed of a forward/reverse rotation motor 06), a reduction gear dη, a winding drum u9) having a gear position sensor impression, and a battery power source (support), and a control box. By using the gear up, gear down, and brake signals from the electronic circuit in 114), the motor side is forward and reversed and stopped at a predetermined position, thereby winding or rewinding the wire (4A) in the Q winding citram rotation. The wire (4A) is pulled and loosened step by step, and the guide device (5) of the gear type transmission means (6) is moved by this wire (4A), thereby moving the chain The self-change gears (3A)...(3B) are adapted to be engaged in the same way, and furthermore, the gear position sensor decoy is connected to the change gears (3A)...(3E).
) is detected whether the chain (9) is engaged or not, that is, which gear stage is being set, and the information is transmitted to the electronic circuit in the control box 0.

As shown in FIG. 5, the gear position sensor (18+) includes a fixing plate (211) fixed to the reduction gear box, and first, second, third, and so on attached to this fixing plate. 4th contact piece (22XX22YX22Z) (22W), !ll removal)
It consists of a rotating plate made of a printed circuit board coaxially supported by the ram (19).The entire surface of this rotating plate (c) is a conductive surface made of copper foil plate. together with the first, second and third contact pieces (22XX22YX22Z
) M-contact part ゛ is a position where the guide device (5) faces from the first stage change gear (3A) to the fifth stage change gear (3E), that is, the number of gears is from the first stage position to 3 b corresponding to when stopped at the 5th stage position
Insulating parts (B), (To), etc. are provided by etching to obtain the binary code of IT, and the fourth contact piece (22W) must be in sliding contact with the conductive surface at all times. The conductive surface (241) is supplied with power from the fourth contact piece (22W), and as a result, the first, second and third contact pieces (22W)
When 2X) (22Y) (22Z) comes into sliding contact with the conductive surface ■, a high level state (H state) signal is transmitted to the insulating part (2
) (c)...If the trap contacts, it will be in a low level state (L state)
It is designed to obtain the first signal, respectively. Second. Mu τ3 contact (zX) (2zY) (2zZ
) Stop position at the 18th position of Karaha gear shift A>
Then, (H, Jl,, L), the stop position at the second gear position, B position> then (L,) I, L), the third gear position.
At the normal stop position and C position in the row, (H, H, L),
At the stop position D position at the 4th gear stage, (L
.

L, H), and at the stop position (E position) at the fifth gear stage, a detection signal of (H, L, H) is obtained.

Next, as shown in FIG. 6, in the control box 0Φ', s (14a) is its display/operation surface. 4 for displaying the number of stages
8-segment numeric display with digits, @@@ (to) is a speed display lamp that indicates whether the content displayed on this numeric display (to) is travel speed, travel distance, travel time, or crank gear rotation speed, distance Indicator lamp, time indicator lamp, crank gear speed indicator lamp (31 + (brass) is a gear up indicator lamp, gear proper indicator lamp, gear down indicator lamp which will be described later).
, the (foundation) is a start/stop key switch,
(g) is the speed key switch, ■ is the distance key switch, (
(441) is a time key switch, East is a time reset key switch, r3AI is a crank gear rotation speed key switch, and (441) is a changeover switch for switching between automatic gear shift and manual gear shift. Gear recall key switch displayed on the numeric display (4
9 is a power switch. Or, when switching from manual gear shifting to automatic gear shifting is performed using the selector switch,
Set the manual lever to the top gear position and connect the wire (4
The control box <14) is equipped with an electronic circuit including a microcomputer device (46) for calculation as shown in FIG. A program to be described later is stored in the storage section of the computer device (46).

Next, I will explain each part of the manual shift means mark. , the guide device (5) of the gear type transmission means (6) is moved by this wire (4B), and the chain (4B) is thereby moved.
9) is adapted to be engaged with any of the change gears (3A, 3E).The position of the manual lever (51) indicated by the broken line in Fig. 7 corresponds to the position of the top gear. , At this time, the wire (4B) is loosened the most and the top position sensor switch Q is turned on.

The figure shows a locking mechanism, and when the manual lever 511 is at the top position, when the lock pin mark is projected by the force of the electromagnet ω, the manual lever 611 is fixed at the top position. When the electromagnet is de-energized, the lock bin haze retracts with the force of the spring (5η), allowing the manual reno (-f51) to be operated.

Now, the operation will be explained. First, turn on the power switch (451
When the motor α6) is turned off, the motor α6) stops at the position where the wire (3A) is loosened the most, and the manual lever 1) is not locked, so the manual lever □-(51)
By operating 1, the gear can be changed manually.

The power switch (when you turn it on, the microcomputer device f40) will turn on the power switch based on the stored program.
When the operation shown in FIG. 9 is performed, that is, when manual mode is selected with the changeover switch (40), the motor aω is driven so that the wires (three people) do not restrict the movement of the guide device (5). and then move the wire (3A) to the most loosened position (
The motor stops at the top position), releases the locking mechanism of the manual lever 6IJ, and then performs processing other than driving the motor, such as speed display. At that time, the changeover switch decoy is monitored. Therefore, the gear shift can be performed using the manual lever (511), and the display of speed, distance, crank shift, gear position, etc. can be obtained arbitrarily. This will become clearer.

When automatic is selected with the changeover switch (40), the microcomputer device (46J) checks whether the manual leno If the manual lever G1) is not in the top position, the indicator lamp (421) is lit to prompt you to move the manual lever 61 to the top position. Since electric gear shifting cannot be performed freely, automatic gear shifting cannot be entered.When the manual lever (51) is moved to the top position, the manual lever (5D) is locked by the locking mechanism 8j for safety, and then ■b gear shifting is performed. Processing and speed display etc. At that time, monitor the changeover switch (0) and
Ru. Therefore, when the microcomputer device Cω detects the power down, it automatically drives the motor C+6) as described in iii. Enter the manual routine to loosen the wire (4A).

To further explain the display and automatic shift processing, the microcomputer device f48 has a running speed range (described later) and a crank gear rotational speed range (described later) corresponding to each of the five change gears, that is, the gear position and number. This information is stored in advance, and the automatic speed change processing procedure shown in FIG. 10 is also stored.

If the driver wants to know the traveling speed, he presses the speed key switch @). Then, the front wheel speed sensor o
The wheel rotation pulse from the vehicle is processed by electronic circuits and numerical calculations to digitally display the traveling speed on the numerical display and the speed display lamp is turned on, and the processing procedure shown in Fig. 10) According to the currently set number of gears, the preset travel speed range is compared with the measured value of the current travel speed, and if the current travel speed is greater than the maximum speed of the set travel speed range, the gear up display lamp is activated. 311
is lit and a gear up signal is output until the traveling speed reaches the number of gears within the set traveling speed range.On the other hand, when the current traveling speed is less than the lowest speed in the set traveling speed range, the gear down display lamp is lit. A gear down signal is output to the soldier until the traveling speed reaches a gear position within the set traveling speed range, and in response, the electric transmission mechanism (1
A brake signal is generated when the motor 1161 of 51 rotates forward to perform gear amplification or rotates reverse to perform gear down, and the gear position sensor aQ outputs a binary code corresponding to the number of gears for the set traveling speed range. The output causes the motor (161'& stop) to maintain the gear type transmission means (6) at the number of gears corresponding to the traveling speed, and the current traveling speed is within the set traveling speed range. Sometimes the gear correctness indicator lamp lights up.

Next, if you want to know the rotation speed of the crank gear (8), press the crank gear rotation speed key switch country. Then, the crank gear rotation pulses from the crank gear rotation sensor Cl5I are counted and processed by an electronic circuit, and the crank gear rotation speed is digitally displayed on the numerical display, and the crank gear speed display lamp is lit. The current crank gear rotation speed is set by comparing the preset crank gear rotation speed range for the currently set number of gears with the measured value of the current crank gear rotation speed according to the processing procedure shown in Figure (B). When the crank gear rotation speed is greater than the maximum crank gear rotation speed in the crank gear rotation speed range, the gear up display lamp q) is lit and a gear up signal is output until the crank gear rotation speed reaches the number of gears that falls within the set crank gear rotation speed range. When the current crank gear rotation speed is smaller than the minimum crank gear rotation speed in the set crank gear rotation speed range, the gear down indicator lamp lights up until the crank gear rotation speed reaches the number of gears within the set crank gear rotation speed range. A gear-down signal is output, and in response, the motor αe of the electric transmission mechanism [15 is rotated in forward and reverse directions to move the gear type transmission means (6) so that the crank gear rotational speed is within a substantially constant range. Furthermore, when the current crank gear rotation speed is within the set crank gear rotation speed range, the proper gear display lamp (support) lights up to indicate that the correspondence between the crank gear rotation speed and the number of gears is appropriate. It has become.

Furthermore, if you press the time key switch, the usage time will be displayed on the numeric display, but at this time, the running speed will also be displayed.
(The number of gears changes automatically so that the speed range is within the set travel speed range.

Next, a method of setting the set speed range corresponding to each of the above-mentioned gear positions will be described. This is the number of gears determined based on the traveling speed in order to drive the bicycle most efficiently and without fatigue depending on the rider and driving situation, where X is the number of gears, Vt is the maximum speed, and v2 V1=aX (,1(=1,2,3.4>V2=
a(X-1)-b (X==2.3, 4.5, but when v2<O, V2=0)> and is stored in the storage section of the microcomputer device (■). By inputting these constants a and b using, for example, a setting switch provided on the back of the control box uJ), the travel speed range corresponding to each gear stage is determined.For example, a = lQ, t) When =5, the relationship between the traveling speed and the number of gears is as shown in FIG. 11(a). In the processing procedure diagram shown in FIG. 10 (a), setting constants a and b are input from the setting switch in order to adjust the traveling speed range depending on the driver and driving conditions, and the speed change is performed according to the setting constants. The number of stages changes depending on the driver and driving conditions, allowing for more appropriate conditions to be set.

Next, a method of setting the crank gear rotational 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 rotational speed of the crank gear in order to prevent the bicycle rider from over-rotating the crank gear or overloading the bicycle.
For this purpose, the crank gear rotational speed is made constant at each gear stage. That is, the crank gear rotation speed can be expressed as the number of revolutions per unit time (r*P rm) of the crank gear (8), but V3(r
, p, s) is the maximum crank gear rotation speed, v4(r, p
, m) is the lowest crank gear rotation speed, and the number of gears is 1.
The row is Vs= dlV<=0, jQ eye empty 4 G eye i tel ld, V3=d.

V4=e, the fifth stage is defined by VB=%, Va=e and stored in the storage section of the microcomputer device αG), and by inputting these constants fid and e with the setting switch, each The crank gear rotational speed range corresponding to the number of gears is determined, for example, d=
60 (r, p, m), e=39 (r.

p t ”), the relationship between the crank gear rotational speed and the number of gears is as shown in FIG. 11 (b).

In the processing procedure diagram shown in the bto diagram (b), the setting constants d and θ are input from the setting switch in order to adjust the crank gear rotation speed range depending on the driver and driving conditions. In the case of so-called inertial operation, where the vehicle is driven without rotating, the +d crank gear rotation speed is almost '
In order to eliminate this case, the measured value of the crank gear rotation speed is changed from 0 (r, p, m) to 5 (r, p
In the case of +a), comparison with the crank gear rotational speed range is not performed.

In addition, on the display operation surface (14a), (mark 4) is a buzzer that sounds by an oscillator of about 2.8 KHz and 8.5 KHz included in the electronic circuit, and it emits a high-pitched sound when gearing up during the above-mentioned speed change operation. , a low sound is emitted when gearing down.0 As another embodiment, instead of the automatic gear shifting of the above embodiment,
As can be understood from the above description, the present invention relates to a multi-stage gear mounted on the rear wheel of a bicycle and an electric transmission in which gears are selected by a switch and shifted by a motor. A transmission means having a guide for selectively meshing the chain with one of the gears and first and second wires connected to the guide; An electric shift means capable of performing a speed change operation, a manual shift means capable of performing a speed change operation by tensioning and loosening the second wire with a manual lever, and when manual is specified with a changeover switch, the first wire is loosened to the maximum. To provide a bicycle transmission device comprising a control means for controlling an electric motor so as to shift the motor to the desired position.The bicycle transmission device is equipped with a control means for controlling an electric motor so as to shift the bicycle to the desired position. . Therefore, it would be very convenient to be able to shift gears even when the electric shift mechanism fails or the power goes out.

[Brief explanation of the drawing]

The drawings relate to an embodiment of the bicycle transmission device of the present invention.
Figure 1 is an overall view of the bicycle mounted on the bicycle, Figure 2 is a configuration diagram of the gear type transmission means, Figure 3 is a configuration diagram of the crank gear rotation sensor, Figure 4 is a configuration diagram of the electric transmission mechanism, and Figure 5 is a configuration diagram of the electric transmission mechanism. The figure shows the configuration of the gear position sensor, (a) shows the overall relationship, and (b) shows the overall relationship.
is a diagram of the fixed plate, B is a diagram of the rotating plate, Figure 6 is a front view of the control box, Figure 7 is a configuration diagram of the manual shift mechanism, Figure 8 is a conceptual block diagram of the electronic circuit, Figure 9 is the overall processing procedure diagram, Fig. 1θ (a) is the processing procedure diagram when the traveling speed display is selected, Fig. 10 (rumor has it that the processing procedure diagram is when the crank gear rotational speed display is selected, and Fig. 11 (a) is the processing procedure diagram when the driving speed display is selected). Figure 11 (B) is a diagram showing the relationship between the running speed and the number of gears. (1) Bicycle, (2) Rear wheel, ( 3
AX3BX3(-'X3L)) (3E)...Change gear, (4A)(4B)...Wire, (5)...
Guide device, (8)...crank gear, (9)...
Chain, (12...Vehicle load speed sensor, O3...Crank gear rotation sensor, O4...Control box, (151...Electric transmission mechanism, 06J...
Motor, agJ... Gear position sensor, (4■... Changeover switch, (5D... Manual lever.) ifγ orbit figure 11 (1″) cylinder figure 11 (b)

Claims (1)

[Claims] 1. It has multiple gears installed on the rear wheel of the bicycle, a guide that selectively engages the chain with one of the gears, and first and second wires connected to the guide. a speed change means, an electric shift means capable of performing a speed change operation by tensioning and loosening the first wire using a motor;
Manual L//(-) manual shift means capable of performing gear shifting operation by tensioning and loosening the second wire, and when manual is designated with a changeover switch, the first wire is at the most loosened position. A bicycle transmission device comprising control means for controlling an electric motor to