JPS5857352B2 - Bicycle electric transmission - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a transmission device for a vehicle such as a bicycle, and relates to a device that uses the rotation of a motor to change the meshing of a chain to a change gear to change gears. The obtained positive half-wave and negative half-wave of the AC voltage are rectified, respectively, and the two rectified outputs are used when switching from the top gear to the low gear direction of the change gear and when switching from the low gear to the top gear, i.e. The device is constructed so that the power source is used when the motor rotates in the forward direction and when the motor rotates in the reverse direction, so that the device can be operated without any other power source such as a battery.

Conventionally, the switching means of the switching device of this type of transmission has generally been of a manual type.

That is, by pulling or loosening a flexible wire by operating a change lever attached to a suitable location on a vehicle such as a bicycle, the guide gear is moved forward or backward, and the chain is switched to the top gear shaft or the low gear.

However, this type of device directly pulls the flexible wire with the change lever, so a large force of 5 to 6 o'clock is required, so it is difficult to remove one hand from the handlebar and apply large force while riding a bicycle. The vehicle lost its balance, swayed, and fell, which was dangerous for traffic safety.

In view of these points, the present invention provides a transmission device that can change the chain from top gear to low gear with a simple operation of switching an electric switch, and is further used for forward and reverse rotation of the motor of the device. Two outputs obtained by rectifying the positive half-wave and negative half-wave of an AC voltage obtained from a small generator are used as power supplies.

An embodiment of the bicycle will be described below with reference to the drawings.

The transmission of the present invention includes a drive gear port linked to a pedal gear, a transmission mechanism 2 that transmits the driving force of the drive gear port to the rear wheels, and a transmission mechanism 2 that is attached to a support rod of a carrier of the vehicle body to operate the transmission mechanism 2. To the control box It is attached near the handle part of the handle, and consists of an operating part etc. that controls the control box.

Next, each part will be explained in detail.

First, the transmission mechanism 2 will be explained. A is a plurality of change gears mounted on the axle of the rear wheel C, and the outer diameter increases from the outside to the inside.

From now on, the innermost change gear will be referred to as the first gear A1, and the gears will move outward in order: second gear A2, third gear A3, and so on.
...It is called the 5th gear A5.

B is a pair of gears bl. A guide gear device consisting of
It is supported by a support plate fixed to the axle so that it can swing in the longitudinal direction of the vehicle body, and can move forward and backward between the first gear A1 and the fifth gear A5. Gears b/ and b'' are opposed to and biased in the direction opposite to the fifth gear A5.

O is the drive gear port, change gear A, and guide gear f.
An endless chain installed between tB transmits the pedal force applied to the pedal as rotational force to the rear wheel C.

Next, we will explain about the control box.

A control room F is configured inside the control box.

G is a reduction gear device housed in the control room F, which is made up of a plurality of gear groups, the first stage gear G1 meshes with the pinion 7 of the DC motor M, and the final stage gear G4 is connected to a flexible wire H.
The proximal end of the flexible wire H is attached to the
A drum J is attached to wind the material.

The tip of the flexible wire 11 is attached to the guide gear device B, and the wire H is wound around or unwound around the drum J by the rotation of the final stage gear G4, and the wire H is pulled and moves back and forth through the guide gear device B. A pair of gears b' and b'' are opposed to one of the change gears A, and a chain o is engaged with that gear A to change speed.

S is a control switch that rotates together with the drum J and stops power supply to the motor M after the drum J has rotated a predetermined amount;
In the circuit shown in FIG. 7, the control switch S is arranged concentrically with a pair of rotating electrodes Sa and Sb arranged in a donut shape and the pair of rotating electrodes 5asb, and the protrusion Sc is connected to the pair of rotating electrodes Sa and Sb. a pair of gaps CI formed between the rotating electrodes Sa and Sb, a donut-shaped stop electrode Sd opposed to one C1 of CI, and a donut-shaped stop electrode Sd disposed between the rotating electrodes Sa and Sb, and between the rotating electrodes Sa, Sb and Contact points Tl and T2 of the fixed electrode group T that are in contact with the protrusion Sc of the stop electrode Sd
...T5, and a first power supply terminal T provided on the symmetric side of the contact T1 of the first stage via the rotating electrodes Sa and Sb.
A, and a second power supply terminal TB provided on the symmetrical side of the contact T5 of the fifth stage via the rotating electrodes Sa and Sb, and the other gap C2 between the pair of rotating electrodes S a and S b. is provided on the symmetrical side of the protruding portion Sc of the contact point Sd.

Further, the fixed electrode group T has a contact point T1 for each stage gear of the change gear A. T2 . T3...
... is the pair of rotating electrodes Sa.

A pair of rotating electrodes Sa,
Sb and the protruding part Sc of the stop electrode Sd are not electrically connected, and the positive half wave of the AC voltage from the bicycle generator GE is rectified by the first diode D1, which is the first rectifier, and an output is supplied. The first power supply terminal TA is connected to the rotating electrode Sa.
and the negative half wave by a second diode D, which is a second rectifier.
The second power supply terminals TB supplying the rectified output in step 2 are configured to be in constant contact with the rotating electrodes sb.

t is a stop contact that short-circuits the stop electrode Sd and the motor M, and is always in contact with the stop electrode Sd.

Next, the operation section for controlling the control box will be explained.

There is a manual switch SW for change gear selection inside the operation part.
is installed, and the change gear selection manual switch SW is connected to each contact T of the fixed electrode group T of the control switch S.
Fixed contacts N1 each connected to I, T2...
, N2... A rotary set of switches consisting of a movable contact Q which is attached to an operating shaft P to which an operating knob is attached and which selectively switches to one of the fixed contacts. By rotating the operating knob, the fixed contacts Nl, N2...
...is switched.

The electrical circuit diagram according to the embodiment of the present invention is as shown in FIG. It has fixed contacts Nl, . . . N5 and a movable contact Q.

Furthermore, the bicycle generator GE generates alternating current voltage when the front wheels rotate, and the first diode D1 rectifies the positive half wave of the alternating voltage, and the second diode D2 rectifies the negative half wave of the alternating voltage. The waves are rectified to obtain rectified outputs.

Next, the operating means in the present invention will be explained.

In the circuit diagram shown in Fig. 7, in which the chain O is installed on the third gear A3 of the change gear A, if you want to change to the fourth gear A4, first bring the bicycle generator GE into contact with the front wheel. If the operating knob of the operating section G is rotated to the fourth stage while generating electricity, the movable contact Q of the change gear selection manual switch SW will come into contact with the fixed contact N4 of the fourth stage.

Then, bicycle generator GE → motor M → manual switch S
A current flows through the movable contact Q of W → fixed contact N4 → contact T4 → rotating electrode Sa → first power supply terminal TA → first diode D1 → bicycle generator GE, and the second diode D
The rectified output of 2 is not used.

Therefore, the motor M rotates so as to rotate the control switch S counterclockwise, and when the protrusion Sc of the stop electrode Sd reaches the position where it contacts the contact T4, no current flows through the motor M via the rotating electrode Sa. In addition, since the circuit is configured as follows: motor M → stop contact t → stop electrode Sd → contact T4 → fourth fixed contact N4 of manual switch SW → motor M, even if DC motor M tries to continue rotating due to inertia, the circuit will not stop. The motor M performs dynamic braking, so the motor M is immediately stopped at a predetermined position.

On the other hand, the rotation of the motor M causes the reduction gear device G to rotate and extend the flexible wire H.

Therefore, the guide gear device B moves backward by the tensile force of the springle, and moves the pair of gears b/, t(' from the position of the third gear A3 to the position of the fourth gear A4.

As mentioned above, when the motor M is stopped, the pair of gears b/ and #f are stopped at the fourth gear A4 position, and the installation of the chain O is changed from the third gear to the fourth gear, and the gear ratio is changed. It is possible to take a step back.

Next, if you want to change to the second gear A2 of the change gear A, rotate the operating knob to the second gear while operating the bicycle generator GE.

Then, the movable contact Q of the change gear selection manual switch SW comes into contact with the second stage fixed contact N2.

Therefore, bicycle generator GE → second diode D2 → second power supply terminal TB → rotating electrode sb → contact T2 → fixed contact N2 of manual switch SW → movable contact Q → motor M → bicycle generator GE, and the current flows, and the first diode D
1 rectified output is not used.

Therefore, the motor M is applied with a voltage in the opposite direction to that described above, and rotates so as to rotate the control switch S clockwise. When the protruding part Sc of the stop electrode Sd comes into contact with the contact T2, the motor M is connected to the rotating electrode. Since the current from sb stops flowing, and the motor M is configured with a motor short circuit consisting of the stop contact t, the stop electrode Sd, the contact T2, etc., as described above, the motor M immediately stops due to dynamic braking.
The winding drum J and the
The guide gear device B never stops at a position other than a predetermined position.

Here, since the reduction gear device G is rotating in the opposite direction from the previous rotation, the flexible wire H is wound onto the drum J.

Therefore, the guide gear device B moves from the fourth gear A4 position and stops at the second gear A2 position.

Next, FIG. 8 shows an electric circuit diagram of another embodiment of the present invention, ie, an embodiment in which a battery power source and a rectified output from a bicycle generator through a rectifier are switched for use.

In the electrical circuit diagram shown in FIG. 8, a normally open switch SWA and a normally closed switch SWB are operated in conjunction with each other.

Therefore, when there is sufficient power in the battery, the electric transmission is operated by the battery power, and when the power in the battery is exhausted, the normally open switch SWA and the normally closed switch S
By interlocking with WB and switching, the electric transmission can be operated using the rectified output from the bicycle generator GE.

As described above, the present invention provides a multi-stage change gear installed on a wheel, a movable guide gear device that is placed opposite to any of the change gears and selectively engages a chain, and a movable guide gear device that is placed opposite to one of the change gears and selectively engages a chain. A flexible wire for moving the kite gear device, a rotatable drum around which the flexible wire is wound, a motor capable of forward and reverse rotation for rotating the drum, and a motor having the same number of contact points as the number of stages of the change gear to set the kite gear device at the desired stage. A manual switch for selecting a change gear located opposite to the change gear; a control switch that stops rotation of a motor in response to the manual switch for selecting a change gear; and a bicycle that comes into contact with a wheel and generates an alternating current voltage by rotation of the wheel. The generator is composed of a first rectifier that rectifies the positive half wave of the AC voltage and a second rectifier that rectifies the negative half wave of the AC voltage, and the output from the first rectifier and the output from the second rectifier are connected to the motor. Since it is configured as a dedicated power source for forward and reverse rotation, the device can be operated without any other power source such as a battery, and furthermore, the battery power source and the rectified output of the small generator can be used together. If the power source can be switched, it can be used as a backup power source when the battery power source is exhausted.

Therefore, it is extremely reliable, and as mentioned at the beginning, it does not require a large amount of force to shift, so there is no risk of the bicycle swinging or falling over, which is extremely beneficial in terms of traffic safety. This makes it possible to provide a bicycle electric transmission device.

[Brief explanation of drawings]

The figures are diagrams for explaining one embodiment of the electric transmission device of the present invention. Figure 1 is an overall view of the electric transmission installed on a bicycle, Figure 2 is a perspective view of the operating section, Figure 3 is an internal view of the control box, and Figure 4 is an internal view of the control box. The figure is a plan view of the reduction gear device, Figure 5 is a perspective view of the transmission mechanism, and Figure 6 is an operational diagram of the transmission mechanism.
The figure shows the gears being shifted respectively. FIGS. 7 and 8 are electrical circuit diagrams showing an embodiment of the present invention. G: Control box, G: Operation unit, O: Chain, A: Change gear,
B... Guide gear device, M... Motor, H... Flexible wire, J...
Drum, S... Control switch, SW...
・Manual switch for change gear selection, GE...
Bicycle generator, Dl...First diode, D
l...Second diode.

Claims (1)

[Claims] 1. A multi-stage change gear installed on a wheel, a movable guide gear device that is placed opposite to one of the change gears and selectively engages a chain, and a flexible wire that moves the guide gear device M to one of the change gears. ,
A rotatable drum around which the flexible wire is wound, a motor capable of forward and reverse rotation for rotating the drum, and a motor having the same number of contact points as the number of stages of the change gear, so as to oppose the kite gear device to the change gear of a desired stage. A manual switch for selecting a change gear, a control switch that stops rotation of a motor in response to the manual switch for selecting a change gear, a bicycle generator that comes into contact with a wheel and generates an alternating current voltage by rotation of the wheel; It consists of a first rectifier that rectifies the positive half-wave of AC voltage and a second rectifier that rectifies the negative half-wave of the AC voltage, and the output from the first rectifier and the output from the second rectifier are used to rotate the motor in forward and reverse directions. An electric bicycle transmission device that serves as a dedicated power source for