JPH09189346A - Transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control the second input based on the first input so as to mechanically balance the fist input with the second input by providing a detecting member for detecting the rotation of a connecting member and additionally providing a controller for controlling input of the second input member by the output signal of the detecting member. SOLUTION: Torque of a pedal shaft 12 by leg-power rotationally moves the first input member 5, a carrier 1c, an internal gear 1b, a connecting member 9, and a projecting part 9a and is transmitted to an output member 7 and a hub 13 via a planetary gear 1d, a sun gear 1a, etc. The rotation of a gasoline engine 10 is enhanced by rotationally moving the detecting member 11 so that a centrifugal clutch 16 is connected. Then, the torque by rotation of the gasoline engine 10 is transmitted to the output member 7 and the hub 13 via a small gear 10a, a large gear 6a, the second input member 6, the internal gear 2b, the planetary gear 2d, the carrier 2c, etc. At the same time, the sun gear 2a is rotated and the detecting member 11 is rotated in the opposite direction to the former case so that the output of the gasoline engine 10 is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention A power transmission device that obtains one output by combining the magnitudes of a first input and a second input from two drive sources with a constant ratio based on the first input, for example, The present invention relates to a power transmission device suitable for driving a bicycle with auxiliary power using a prime mover such as a gasoline engine or an electric motor.

[0002]

2. Description of the Related Art Two power transmission devices are provided as a power transmission device that obtains one output by making a magnitude of a first input and a second input from two driving sources as a resultant force of a constant ratio based on the first input. A power transmission device that detects an output that is a resultant force of a first input and a second input from a drive source and a magnitude of the first input, and controls the magnitude of the second input based on the difference. There is.

[0003]

Therefore, a second means based on means for detecting the magnitude of the output, which is the resultant force of the first input and the second input, and the magnitude of the first input, and the calculation of the difference therebetween. There is a problem in that the device is complicated and expensive because it requires a means for controlling the input of.

[0004]

SUMMARY OF THE INVENTION One of a sun gear or an internal gear or a carrier of a first planetary gear device of a first and a second planetary gear device arranged coaxially and a second planetary gear device of a second planetary gear device. One of the sun gear or the internal gear or the carrier is coupled to form a coupling member, and the first input member is coupled to any one other than the one of the first planetary gear units, An output member is coupled to another one of the first planetary gear devices, and a second input member is coupled to any other one of the second planetary gear devices, and a second planetary gear device is coupled to the second planetary gear device. A control for connecting the output member to another one of the gear devices and providing a detection member for detecting the rotation of the connection member, and controlling the input to the second input member by the output signal of the detection member. In a power transmission device equipped with a device, a first and a second device arranged coaxially The internal gear of the first planetary gear device of the star gear device and the sun gear of the second planetary gear device are coupled to form a coupling member, and the first input member is coupled to the carrier of the first planetary gear device. , Connecting an output member to the sun gear of the first planetary gear set, connecting a second input member to the internal gear of the second planetary gear set, and connecting the output member to a carrier of the second planetary gear set In addition, a detection member for detecting the rotation of the coupling member is provided, and a control device for controlling the input to the second input member by the output signal of the detection member is additionally provided.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will now be described with reference to the drawings. In the embodiment of the present invention, a case where a gasoline engine is used as a prime mover will be described. FIG. 1 is a configuration diagram of an embodiment in which the present invention is applied to a bicycle with auxiliary power. 2 and 3 are explanatory views of the first and second planetary gear devices 1 and 2 of FIG. 1 viewed from the direction of arrow A. FIG. 4 shows the first and second planetary gear units 1 and 2, the torque detection member 11, and the second input control unit 15.
FIG. 4 is an explanatory view of the device viewed from the direction of arrow A. FIG. 6 is a partial sectional view of the power transmission device having the configuration of FIG. FIG. 1, FIG. 2,
In FIG. 3 and FIG. 6, the first planetary gear device 1 and the second planetary gear device 2 are arranged coaxially, and the pedal shaft 12 is located at the center.
Is provided. An output member 7 formed on a hollow output shaft is provided outside the pedal shaft 12. The first internal gear 1b and the second sun gear 2a are coupled by a coupling member 9 and are rotatably fitted to the outer periphery of the output member 7. A planetary gear 1d is meshed with the inside of the first internal gear 1b and is rotatably supported by a carrier 1c. The carrier 1c is connected to a pedal shaft 12 via a first input member 5. The sun gear 1a is meshed with the inside of the planetary gear 1d, and the sun gear 1a is provided so that the rotation is transmitted to the output member 7 only when the sun gear 1a rotates in the forward direction of the bicycle, that is, in the O ₁ direction of FIG. It is coupled to the output member 7 formed on the output shaft via 8a. The one-way clutch 8a may be of any type such as roller type, ratchet type, and freewheel type. The same applies to the one-way clutches 8b, ... 8f described below.

A planetary gear 2d is provided outside the second sun gear 2a.
Is rotatably supported by the carrier 2c, and the carrier 2c is provided so that the rotation is transmitted to the output member 7 only when the carrier 2c rotates in the forward direction of the bicycle, that is, the O ₂ direction in FIG. It is connected to the output member 7 via 8b. An internal gear 2b is meshed with the outside of the planetary gear 2d, and the internal gear 2b is connected to a second input member 6 provided outside the output member 7. As shown in FIG. 6, the pedal shaft 12 and the output member 7 are rotatably supported by bearings 22a and 22b provided on the frame bodies 21a and 21b, and the planetary gears 1d and 2d are the carrier 1c and the carrier 1c. It is rotatably supported via shafts 1e and 2e provided on 2c. The second input member 6 has a large gear 6a.
Is engaged with the rotary shaft 10c of the gasoline engine 10 through a centrifugal clutch 16 and meshes with a small gear 10a. A sprocket 7a is provided at the end of the output member 7, and a transmission chain 14a is provided between the sprocket 13a provided on the hub 13 rotatably supported by the axle 13b.
b.

In FIG. 4, the coupling member 9 is provided with restraining members 4a and 4b for restraining the projecting portion 9a so as to rotate around the output member 7 by a required angle in the frame body 21a of FIG. There is. In addition, in the direction in which the protrusion 9a is brought into contact with the restraining member 4a, that is, the second input I ₂ causes the second sun gear 2a to move.
A spring 3 that repels the coupling member 9 is provided in the direction of the arrow S _{2 of} the force acting on. One end of a link 9c is rotatably connected to the tip of the protruding portion 9a via a pin 9d, and the other end of the link 9c is rotated together with the shaft 15a of the throttle valve of the control device (carburetor) 15 of the gasoline engine 10. The detection member 11 formed on the lever
Is rotatably connected via. Instead of using the spring 3 to repel the coupling member 9, a shearing force or a compressing force of rubber may be used.

The operation of one embodiment of the present invention configured as described above will be described. 1, FIG. 2, FIG. 3 and FIG. 4, when the vehicle is driven by the pedal effort and the power of the gasoline engine, the gasoline engine 10 is started and rotated in an idling state. In this state, the centrifugal clutch 16 is disengaged, so that power is not transmitted to the small gear 10a. Next, when the pedal is depressed to move the bicycle forward, the forward torque of the pedal shaft 12 due to the pedal depression force causes the carrier 1c to rotate in the arrow I ₁ direction in FIG. 2 via the first input member 5. The internal gear 1b rotates in the arrow S ₁ direction, and the coupling member 9 and the protrusion 9a rotate in the arrow S ₁ direction. The planetary gear 1d rotates in the direction of arrow G and rotates the sun gear 1a.
Is rotated in the direction of arrow O ₁ and torque in the forward direction of the bicycle is transmitted to the output member 7 via the one-way clutch 8a, and the sprocket 7a, chain 14b, sprocket 13a and 1
Hub 13 via directional clutch (freewheel) 8c
The torque in the forward direction of the bicycle due to the pedal effort is transmitted to the. Further, the detection member 11 is rotated in the direction of arrow B via a link 9c connected to the tip of the protruding portion 9a to rotate the shaft 15a of the throttle valve of the control device (carburetor) 15 of the gasoline engine 10 to rotate the throttle valve shaft 15a. When the opening is increased, the rotation of the gasoline engine 10 increases and the centrifugal clutch 1
6 connects.

The forward torque due to the rise in rotation of the gasoline engine 10 causes the second input member 6 to rotate by rotating the small gear 10a and the large gear 6a by connecting the centrifugal clutch 16.
The rotating internal gear 2b is rotated in the arrow I ₂ direction in FIG. 3 in the forward direction. The planetary gear 2d rotates in the direction of arrow H, the carrier 2c rotates in the direction of arrow O ₂ , and the one-way clutch 8b.
Torque in the forward direction is transmitted to the output member 7 via the sprocket 7a, chain 14b) sprockets 13a and 1
Torque in the forward direction of the bicycle due to the rotation of the gasoline engine 10 is transmitted to the hub 13 via the direction clutch 8c. The sun gear 2a is rotated in the arrow _{S 2} direction, coupling members 9
And the protrusion 9a is rotated in the arrow S ₂ direction together. Thereby, the detection member 11 is rotated in the direction opposite to the arrow B via the link 9c connected to the tip of the protruding portion 9a, and the shaft 15a of the throttle valve of the control device (carburetor) 15 of the gasoline engine 10 is rotated. Then, the opening of the throttle valve is reduced to reduce the output of the gasoline engine 10. Therefore, the detection member 11 is held at a position where the force for rotating in the S ₁ direction due to the pedaling force of the pedal and the force for rotating in the S ₂ direction due to the output of the gasoline engine 1 are balanced, so that the teeth of the planetary gear units 1 and 2 are The output of the gasoline engine, which corresponds to the numerical ratio and has a constant ratio based on the pedal effort, is always added as auxiliary power.

As described above, as shown by the torque curve in FIG. 5, the input torque I ₁ by the pedaling force via the first planetary gear unit ₁ and the input torque I by the gasoline engine via the second planetary gear unit 2 are shown. ₂ outputs as indicated by the resultant output torque O, and the output torque O ₁ due to the pedaling force of the pedal is assisted by the output torque O ₂ due to the gasoline engine. Since the output torque O ₁ due to the pedal effort and the output torque O ₂ due to the gasoline engine have the same number of revolutions, the output due to the pedal effort and the output due to the gasoline engine may be displayed.

The ratio of the magnitude of the output torque O ₁ due to the pedaling force to the magnitude of the output torque O ₂ due to the gasoline engine can be changed by changing the tooth number ratio of the first and second planetary gear units. As an example of the gear ratio, the gear ratio in the case of the combination of the first embodiment shown in FIG. 1 is as follows: sun gears 1a = 54 and 2a = 72, internal gear 1b = 1.
08 and 2b = 108, planetary gears 1d = 27 and 2d =
When it is set to 18, the rotation speed of the input member 5 due to the pedal effort is increased by 2.33 times to rotate the output member 7, and the rotation speed of the input member 6 due to the gasoline engine is decreased to 0.6 times to output the output member 7. To rotate. At this time, the output torque O ₁ due to the pedaling force and the output torque O _{1 due} to the gasoline engine
The ratio of ₂ is 1 to 1.

When the auxiliary power-assisted bicycle equipped with the power transmission device according to the means of the present invention is pushed backward to move the bicycle, FIG.
Also, in FIG. 4, the output member 7 rotates in the direction of arrow D, which is opposite to the rotational directions O ₁ and O _{2 in} the case of forward movement. Therefore, the sun gear 1a rotates in the direction of arrow D and the planetary gear 1d
Applies a torque that rotates in the direction of arrow E to rotate the internal gear 1b in the direction of arrow S ₁ . The carrier 2c has an arrow F.
Torque for rotating the sun gear 2a of the arrow S ₂ direction rotates in direction acts. In the case of an example of the above-mentioned tooth number ratio, the torque for rotating the connecting member 9 in the direction of the arrow S ₁ and the arrow S ₂
The ratio of the torque to rotate in the direction is 1: 1 and the spring 3 is repelled in the direction of arrow S ₂ , so that the coupling member 9 does not rotate. Therefore, the engine is never driven.

In order to prevent the torque for rotating the connecting member 9 in the direction of the arrow S ₁ from acting when the above-described bicycle with auxiliary power of the present invention is pushed and moved backward, FIG.
In FIG. 7, a one-way clutch 8d, which connects the internal gear 1b and the connecting member 9 only when the internal gear 1b rotates in the direction of the arrow S ₁ , is provided between the internal gear 1b and the connecting member 9, and the planetary gear 1 A one-way clutch 8e that prevents 1d from rotating in the direction of arrow E is provided between the planetary gear 1d and the carrier 1c. When the auxiliary power-assisted bicycle of this configuration is pushed backward to move, the output member 7 rotates in the direction of arrow D, which is opposite to the arrow O _{1 in} the case of forward movement, and the sun gear 1a moves through the one-way clutch 8a. Rotate in the D direction. Planet gear 1d is E
However, the internal gear 1b receives the torque that rotates in the direction of arrow J because the one-way clutch 8e suppresses the rotation. Since the one-way clutch 8d is not engaged, the internal gear 1b rotates in the arrow J direction and the connecting member 9 does not receive the rotational torque in the arrow S ₁ direction. Therefore, the rotation of the gasoline engine 10 is not increased.

[0014]

As described above, the power transmission device of the present invention controls the second input so that the first input and the second input are mechanically balanced with respect to the first input. The means is simplified, the torque calculation means is not required, and mechanical control of the gasoline engine of the drive source (auxiliary power) of the second input or control of the electric motor is simple and the operation can be reliably ensured at low cost. effective.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an embodiment in which the present invention is applied to a bicycle with auxiliary power.

FIG. 2 is an explanatory view of the first planetary gear device 1 of FIG. 1 as viewed in the axial direction.

FIG. 3 is an explanatory view of the second planetary gear device 2 of FIG. 1 as viewed in the axial direction.

FIG. 4 is an explanatory view in which the first and second planetary gear units 1 and 2 and the detection member 11 of FIG. 1 are viewed in the axial direction.

[Fig. 5] Torque curve diagram

6 is a partial sectional view of the power transmission device according to the training of FIG.

FIG. 7 is a configuration diagram of another embodiment in which the present invention is applied to a bicycle with auxiliary power.

[Explanation of symbols]

1 first planetary gear device 1a, 2a sun gear 1b, 2b internal gear 1c, 2c carrier 1d, 2d planetary gear 1e, 2e shaft 2 second planetary gear device 3 springs 4a, 4b, 9g restraining member 5 first Input member 5a, 7a, 12a, 13a Sprocket 6 Second input member 6a Large gear 7 Output member 8a, 8b, 8c, 8d, 8e One-way clutch 9 Coupling member 9a Projection 9c Link 9d, 9e Pin 9f Boss 10 Motor (Gasoline engine, electric motor, etc.) 10a small gear 10b intermediate reduction small gear 10c rotating shaft 11 detection member (lever) 12 pedal shaft 13 hub 13b axles 14a, 14b chain 15 control device (carburetor, variable resistance and chopper circuit, etc.) 15a throttle Valve shaft 16 Centrifugal clutch 17 Ratchet 18 Ratchet pawl lever -18b Ratchet claw shaft 18c Pin 19 Brake interlocking wire 20 Dampers 21a, 21b Frame 22a, 22b Bearing

Claims (1)

[Claims] 1. A sun gear or an internal gear or a carrier of a first planetary gear device of a first and a second planetary gear device arranged coaxially, and a sun gear or an internal gear of a second planetary gear device. One of the gears or the carrier is coupled to form a coupling member, and the first input member is coupled to any one other than the one of the first planetary gear units to couple the first planetary gear. An output member is coupled to the other one of the gear units, and the second member is connected to the other one of the second planetary gear units except the second member.
Is connected to the other input member of the second planetary gear device, and a detection member for detecting the rotation of the connection member is provided. In the power transmission device provided with a control device for controlling the input to the second input member, the internal gear of the first planetary gear device and the second gear of the first and second planetary gear devices arranged coaxially are provided. Connecting the sun gear of the planetary gear set to form a connecting member, connecting the first input member to the carrier of the first planetary gear set, connecting the output member to the sun gear of the first planetary gear set, A second input member is coupled to an internal gear of the second planetary gear device, the output member is coupled to a carrier of the second planetary gear device, and a detection member for detecting rotation of the coupling member is provided. , A control for controlling the input to the second input member by the output signal of the detection member. Power transmission apparatus characterized by annexed the device.