TWI836102B - Transmission devices for human-driven vehicles and auxiliary systems for human-driven vehicles equipped with the transmission devices - Google Patents

Abstract

The present invention provides a transmission device for a human-powered vehicle that can appropriately configure a shifting stage, and an auxiliary system for a human-driven vehicle equipped with the transmission device.

The transmission device for a human-driven vehicle of the present invention comprises: a first transmission unit having a first transmission path for changing the speed of an input rotation; a second transmission unit having a second transmission path for changing the speed of the input rotation and configured to transmit the rotation to the first transmission unit; and a switching unit for changing the speed ratio of the human-driven vehicle in stages; the first transmission unit having a first planetary gear unit, The transmission path at least includes: a first transmission path passing through the first speed change path; a second transmission path passing through the second speed change path but not through the first speed change path; and a third transmission path passing through both the first speed change path and the second speed change path; when the switching unit increases the speed ratio in stages, the transmission path is switched in the order of the first transmission path, the second transmission path, and the third transmission path.

Description

A transmission device for a human-driven vehicle and an auxiliary system for a human-driven vehicle equipped with the transmission device

The present invention relates to a transmission device for a human-powered vehicle and an auxiliary system for a human-powered vehicle equipped with the transmission device.

The transmission device for a human-powered vehicle disclosed in Patent Document 1 includes an internal transmission that changes the speed ratio of the human-powered vehicle in stages. The internal transmission includes a first transmission unit and a second transmission unit. The transmission device of Patent Document 1 changes the speed of the rotation by the first transmission unit in the second and third transmission stages, and outputs the rotation to the output body without changing the speed of the rotation by the second transmission unit. The transmission device of Patent Document 1 changes the speed of the rotation by both the first transmission unit and the second transmission unit in the fourth transmission stage and the fifth transmission stage with the largest speed ratio, and outputs the rotation to the output body.

[Prior Art Literature] [Patent Literature]

[Patent document 1] Japanese Patent No. 4564978

In order to increase the speed ratio of the above-mentioned speed change device, once the speed change unit used for speed change further increases the speed ratio, since it is often used for speed change, the degree of freedom in the configuration of the speed change stage decreases.

An object of the present invention is to provide a transmission device for a human-driven vehicle that can appropriately configure a shifting stage and an auxiliary system for a human-driven vehicle equipped with the transmission device.

The transmission device according to the first aspect of the present invention is a transmission device for a human-driven vehicle, and is provided with: a first transmission unit having a first transmission path for converting the input rotation speed; a second transmission unit having a first transmission path for converting the input rotation speed; The second transmission path of the rotational transmission is configured to transmit the rotation to the aforementioned first transmission unit; and a switching unit that changes the transmission ratio of the aforementioned human-powered vehicle in stages; the aforementioned first transmission unit has a first In the planetary gear unit, the switching unit switches the transmission path for inputting the rotation of the first speed change unit and the second speed change unit by changing the rotational state of at least one of the first speed change unit and the second speed change unit, and the aforementioned transmission The path has at least: a first transmission path that passes through the aforementioned first transmission path; a second transmission path that passes through the aforementioned second transmission path without passing through the aforementioned first transmission path; and a third transmission path that passes through the aforementioned first transmission path. Both the first transmission path and the aforementioned second transmission path; when the aforementioned switching unit gradually increases the aforementioned transmission ratio, the aforementioned transmission path is configured according to the aforementioned first transmission path, the aforementioned second transmission path, and the aforementioned third transmission path. Sequence switching.

When the transmission device of the first aspect is adopted, when the switching portion increases the transmission ratio step by step, there is a transmission path between the first transmission path and the third transmission path that does not pass through the first transmission path of the first transmission unit. The first transmission path of the transmission unit is a second transmission path, so the transmission phase can be appropriately configured. When the transmission device of the first aspect is adopted, when switching from the first transmission path to the second transmission path, it is difficult to switch the transmission path by suppressing the torque input to the first planetary gear unit.

In the transmission device of the second aspect of the first aspect, the first speed change path has a first path and a second path, and the switching unit is configured to switch from one of the first transmission path and the third transmission path to the other, and in the first transmission path and the third transmission path, the speed ratio when the first speed change path includes the second path is greater than the speed ratio when the first speed change path includes the first path.

When the speed change device of the second aspect is used, two speed change stages can be formed in at least one of the first transmission path and the third transmission path.

In the transmission device according to the third aspect of the second aspect, the first planetary gear unit has: at least two first sun gears and at least one first ring gear, each of which meshes with the at least two first sun gears. At least two first planetary gears, and a first carrier that can move around the corresponding first sun gear and support the at least two first planetary gears, and the aforementioned switching unit is configured to change the at least two first planetary gears. The rotation state of the sun gear is such that the aforementioned transmission path passes through one of the aforementioned at least two first sun gears, the aforementioned first path passes through the aforementioned at least one of the aforementioned two first sun gears, and the aforementioned second path passes through the aforementioned at least two first sun gears. Among the at least two first sun gears, one of the first sun gears passes through a different one than the first sun gear that passes through the first path.

When the transmission device of the third aspect is adopted, two transmission stages can be appropriately formed by making the first sun gears passing through the first path and the second path respectively different.

In the transmission device of the fourth aspect of the second aspect, the first transmission path further includes a third path, and the switching unit is configured to switch from one of the first transmission path and the third transmission path to the other, and the first transmission path includes the third path. In the first transmission path and the third transmission path, the speed ratio when the first transmission path includes the third path is greater than the speed ratio when the first transmission path includes the second path.

When the speed change device of the fourth aspect is adopted, three speed change stages can be formed in at least one of the first transmission path and the third transmission path.

In the transmission device according to the fifth aspect of the third aspect, the first transmission path further has a third path, and the switching section is configured to switch from one of the first transmission path and the third transmission path including The second path, the first speed change path, and the first speed change path including the third path are configured to switch from one to the other. In the first transmission path and the third transmission path, respectively, the third transmission path is The speed ratio when a speed change path includes the third path is larger than the speed ratio when the first speed change path includes the second path, and the first planetary gear unit has at least three first sun gears, The third path passes through a first sun gear different from the first sun gear passing through the first path and the second path among the at least three first sun gears.

When the speed change device of the fifth aspect is adopted, three speed change stages can be appropriately formed by making the first sun gears passing through the first path and the second path respectively different.

In the transmission device of the sixth aspect according to any one of the first to fifth aspects, the transmission path further has a fourth transmission path for transmitting the input rotation without changing the speed, and the switching unit switches the transmission path in the order of the fourth transmission path, the first transmission path, the second transmission path, and the third transmission path when the speed ratio is increased in stages.

When the speed change device of the sixth aspect is adopted, the speed change step is increased by the fourth transmission path that rotates without changing the speed of the input rotation.

In the transmission device according to the seventh aspect of the third or fifth aspect, the second transmission unit has a second planetary gear unit, and the second planetary gear unit has: at least one second sun gear, at least one second a ring gear, at least one second planetary gear meshing with the at least one second sun gear, and a second carrier that movably supports the second planetary gear around the at least one second sun gear, the switching portion By changing the rotation state of the at least one second sun gear, the transmission path passes through one of the at least one second sun gear, and the first carrier and the second ring gear pass through the transmission part The first carrier and the second carrier are connected through a first one-way clutch. In the first transmission path, the rotation of the second carrier causes the first carrier to rotate through the first one-way clutch. In the third transmission path, the rotation of the second ring gear causes the first carrier to rotate through the transmission part.

When the transmission device of the seventh aspect is used, in the first transmission path, the rotation of the second carrier can be properly transmitted to the first carrier via the first one-way clutch, and in the third transmission path, the rotation of the second annular gear can be properly transmitted to the first carrier via the transmission part.

In the transmission device according to the eighth aspect of the seventh aspect, the transmission path further includes a fourth transmission path that transmits the input rotation without changing the speed, and in the fourth transmission path, the rotation of the second carrier passes through the first transmission path. A one-way clutch causes the first carrier to rotate, and the rotation of the first carrier causes the second ring gear to rotate through the transmission part.

When the transmission device according to the eighth aspect is adopted, the rotation of the first carrier can be appropriately transmitted to the second ring gear via the first one-way clutch in the fourth transmission path.

In the transmission device according to the ninth aspect of the seventh aspect, when the switching unit increases the speed ratio in steps, the transmission path is switched from the first transmission path to the second transmission path. When reaching the path, it is configured to change the rotational state of the at least two first sun gears after changing the rotational state of the at least one second sun gear.

When the transmission device according to the ninth aspect is adopted, it is possible to suppress the change of the rotational state of the first sun gear before changing the rotational state of the second sun gear.

In the transmission device according to the tenth aspect of the ninth aspect, the transmission part includes: one of the concave part and the convex part provided on one side of the outer circumference of the first carrier and the inner circumference of the second annular gear; and the other of the concave part and the convex part provided on the other side of the outer circumference of the first carrier and the inner circumference of the second annular gear; the length of the concave part in the circumferential direction is greater than the length of the convex part in the circumferential direction.

When the speed change device of the tenth aspect is used, the rotation can be properly transmitted both when the rotation is transmitted from the first carrier to the second annular gear and when the rotation is transmitted from the second annular gear to the first carrier.

In the transmission device according to the eleventh aspect of any one of the seventh to tenth aspects, the output body further includes: a second one-way clutch and a third one-way clutch, and the first ring gear passes through the second one-way clutch. A one-way clutch is connected to the output body, and the second ring gear is connected to the output body via the third one-way clutch.

When the transmission device of the eleventh aspect is adopted, the second one-way clutch is used to suppress the rotation of the output body from being transmitted to the first annular gear, and the third one-way clutch is used to suppress the rotation of the output body from being transmitted to the second annular gear.

The transmission device according to the twelfth aspect of the present invention is a transmission device for a human-driven vehicle, and is provided with: a first transmission unit having a first transmission path for converting input rotation speed; and a second transmission unit having a first transmission path for converting input rotation speed. The second transmission path of the input rotational transmission is configured to transmit the rotation to the first transmission unit; and a switching unit that changes the transmission ratio of the human-powered vehicle in stages; The first speed change unit has a first planetary gear unit, the first speed change path has a plurality of paths with different speed ratios, and the switching unit is configured to change at least one of the first speed change unit and the second speed change unit. The rotation state is used to switch the transmission path that inputs the rotation of the first transmission unit and the second transmission unit. When the transmission path passes through the first transmission path, the transmission path is from the first transmission path including one of the plurality of paths. , and the first speed change path including the other one of the plurality of paths is configured to switch the transmission path to the other. When the speed change ratio is increased stepwise, by passing through the plurality of paths including the a transmission path formed by a transmission path of a first transmission path forming a first transmission ratio; and by transmission through a first transmission path forming a transmission ratio smaller than the first transmission ratio among the plurality of paths The speed change stages formed by the first speed change path include the speed change stages formed by a transmission path that does not pass through the first speed change path.

When the speed change device of the twelfth aspect is adopted, the speed ratio of the speed change stage of the path that forms a speed ratio smaller than the first speed ratio among the plurality of paths is increased step by step, and the speed ratio can be larger than the speed change stage of the path that forms the first speed ratio among the plurality of paths. Therefore, the speed change stage can be appropriately constructed.

A thirteenth aspect of the transmission device according to any one of the aforementioned first to twelfth aspects, further comprising a wheel housing (Hub) that accommodates the aforementioned first transmission unit, the aforementioned second transmission unit, and the aforementioned switching portion .

When the transmission device of the thirteenth aspect is adopted, the transmission stage can be appropriately constructed in the transmission device with a wheel housing.

The auxiliary system according to the fourteenth aspect of the present invention is an auxiliary system for a human-driven vehicle, and is provided with: any one of the transmission devices in the first to thirteenth aspects; and a motor, which is an auxiliary human-driven driving force.

When the auxiliary system of the fourteenth aspect is adopted, the speed change stage can be appropriately formed in the auxiliary system equipped with a motor. When the speed change device of the fourteenth aspect is adopted, the speed change stage can be appropriately formed in the speed change device in which the rotational torque input by the motor is increased.

According to the auxiliary system of the fifteenth aspect of the fourteenth aspect, an operating unit is further provided, which is operated manually in order to operate the transmission device, and the transmission device changes the gear ratio of the human-driven vehicle according to the operation of the operating unit.

When the speed change device of the fourteenth aspect is adopted, the speed change stage can be appropriately configured in the auxiliary system provided with the operating portion operated by human hands.

The transmission device for a human-driven vehicle of the present disclosure and the auxiliary system for a human-powered vehicle equipped with the transmission device can appropriately constitute a transmission stage.

10: Human powered vehicle

12:Crank

12A: Crankshaft

14:wheels

14A:Rear wheel

14B:Front wheel

16:Car body

18: Frame

20: Pedal

22:Driving mechanism

24:First rotating body

26:Second rotating body

28: Connecting components

30:Front fork

32: Rod

34:Handle

36:Battery

40:Auxiliary system

42: Motor

44:Operation Department

50,50A:Transmission device

52,52A: First transmission unit

54: Second transmission unit

56: Switching unit

56A: First switching unit

56B: Second switching part

56C: The third switching part

56D: Fourth switch unit

58:Shaft member

60,60A: First planetary gear unit

62,62A,62B,62C: First sun gear

64: First ring gear

66,66A,66B,66C,66D: First planetary gear

66E: First planetary gear body

68:First carrier

68A:Part 1

68B:Part 2

68C:Part 3

70: Second planetary gear unit

72: Second sun gear

74:Second ring gear

76,76A: Second planetary gear

78: Second carrier

78A:Part 1

78B: Part 2

78C:Part 3

80: Communication Department

80A: Recessed part

80B: convex part

82: First one-way clutch

84: Output body

86: Second one-way clutch

88:Third one-way clutch

90:wheel hub

92:Flange

92A: Hole

94: Input body

96:Claw member

96A: First claw member

96B: Second claw component

96C: Third claw member

98:Arm component

98A: Base part

98B: First Arm

98C:Second arm

98D:Third arm

100:Forcing member

102: concave part

104:Arm component

104A: Base part

104B: First Arm

104C:Second arm

104D: The third arm

104E:Fourth arm

L1: First speed change path

L11: First path

L12: Second path

L13: The third path

L2: Second transmission path

R1: first rotation phase

R2: Second rotation phase

R3: The third rotation phase

R4: The fourth rotation phase

R5: Fifth rotation phase

S: Transmission path

S1: First communication path

S2: Second transmission path

S3: The third transmission path

S4: The fourth communication path

Q1: First rotation phase

Q2: Second rotation phase

Q3: The third rotation phase

Q4: The fourth rotation phase

Q5: The fifth rotation phase

Q6: The sixth rotation phase

Q7: Seventh rotation phase

Q8: The eighth rotation phase

FIG. 1 is a side view of a human-driven vehicle including a transmission device for a human-powered vehicle according to a first embodiment and an auxiliary system for the human-driven vehicle equipped with the transmission device.

Figure 2 is a front view of the transmission device for the human-powered vehicle of Figure 1.

Figure 3 is a cross-sectional view along line D3-D3 in Figure 2.

Figure 4 is a cross-sectional view along line D4-D4 in Figure 3.

Figure 5 is a front view of the switching part of Figure 3.

Figure 6 is a cross-sectional view along line D6-D6 in Figure 3.

Figure 7 is a cross-sectional view along line D7-D7 in Figure 3.

Figure 8 is a perspective view of the arm component of Figure 3.

Figure 9 is a side view of the arm member of Figure 3.

FIG10 is a partial cross-sectional view showing the state of transmitting driving force from the first carrier to the second annular gear in the switching portion of FIG4.

FIG11 is a partial cross-sectional view showing the state of transmitting driving force from the second annular gear to the first carrier in the switching portion of FIG4.

FIG. 12 is a schematic diagram showing the transmission path of the transmission device for the human-driven vehicle in FIG. 3 in the first transmission stage.

FIG. 13 is a schematic diagram showing the transmission path of the transmission device for the human-driven vehicle in FIG. 3 in the second transmission stage.

FIG. 14 is a schematic diagram showing the transmission path of the transmission device for the human-driven vehicle in FIG. 3 in the third transmission stage.

FIG. 15 is a diagram showing the transmission path model of the transmission device for the human-driven vehicle in FIG. 3 in the fourth speed shifting stage.

FIG. 16 is a diagram showing the transmission path model of the transmission device for the human-driven vehicle in FIG. 3 in the fifth speed shifting stage.

Fig. 17 is a side view of the arm member of the second embodiment.

FIG. 18 is a diagram showing a transmission path pattern of the second embodiment of the transmission device for a human-driven vehicle in the first shifting stage.

FIG. 19 is a schematic diagram showing the transmission path of the transmission device for a human-driven vehicle in the second transmission stage according to the second embodiment.

FIG. 20 is a diagram showing a transmission path pattern of the second embodiment of the transmission device for a human-driven vehicle in the third speed shifting stage.

FIG. 21 is a schematic diagram showing the transmission path of the transmission device for a human-driven vehicle in the fourth transmission stage according to the second embodiment.

FIG. 22 is a schematic diagram showing the transmission path of the transmission device for a human-driven vehicle in the fifth transmission stage according to the second embodiment.

FIG. 23 is a schematic diagram showing the transmission path of the transmission device for a human-driven vehicle in the sixth transmission stage according to the second embodiment.

FIG. 24 is a diagram showing a transmission path pattern of the second embodiment of the transmission device for a human-driven vehicle in the seventh speed stage.

FIG. 25 is a schematic diagram showing the transmission path of the transmission device for a human-driven vehicle in the eighth transmission stage according to the second embodiment.

<First embodiment>

Referring to FIGS. 1 to 16 , the first embodiment of the human-powered vehicle auxiliary system 40 and the human-powered vehicle transmission device 50 are described. The human-powered vehicle 10 is a vehicle that can be driven at least by human power. The human-powered vehicle 10 is not limited to the number of wheels, and for example, also includes a unicycle and a vehicle with more than three wheels. The human-powered vehicle 10 includes, for example: mountain bikes, road bikes, city bikes, cargo bikes, recumbent bikes and other bicycles, as well as electric bikes (E-bikes). Electric bikes include electric assisted bicycles that are propelled by electric motors. In the following, the human-powered vehicle 10 is described as a bicycle in the embodiment.

The human-powered vehicle 10 includes a crank 12 for inputting human-powered driving force, a wheel 14, and a vehicle body 16. The wheel 14 includes a rear wheel 14A and a front wheel 14B. The vehicle body 16 includes a frame 18. The crank 12 includes a crankshaft 12A that can rotate relative to the frame 18, and crank arms 12B that are respectively provided at the axial ends of the crankshaft 12A. Pedals 20 are respectively connected to each crank arm 12B. The rear wheel 14A is driven by the rotation of the crank 12. The rear wheel 14A is supported by the frame 18. The crank 12 and the rear wheel 14A are connected by a driving mechanism 22. The driving mechanism 22 includes a first rotating body 24 connected to the crankshaft 12A. The crankshaft 12A and the first rotating body 24 can also be connected via a one-way clutch. The one-way clutch is configured so that when the crank 12 rotates forward, the first rotating body 24 rotates forward, and when the crank 12 rotates backward, the first rotating body 24 does not rotate backward. The first rotating body 24 includes: a sprocket, a pulley, or a bevel gear. The driving mechanism 22 further includes: a second rotating body 26, and a connecting member 28. The connecting member 28 transmits the rotational force of the first rotating body 24 to the second rotating body 26. The connecting member 28 includes, for example: a chain, a belt, or a shaft.

The second rotating body 26 is connected to the rear wheel 14A. The second rotating body 26 includes a sprocket, a pulley, or a bevel gear. A one-way clutch is preferably provided between the second rotating body 26 and the rear wheel 14A. The one-way clutch is configured so that when the second rotating body 26 rotates forward, the rear wheel 14A rotates forward, and when the second rotating body 26 rotates backward, the rear wheel 14A does not rotate backward.

The front wheel 14B is mounted on the frame 18 via the front fork 30. The front fork 30 is connected to the handlebar 34 via the rod 32. The rear wheel 14A of this embodiment is connected to the crank 12 via the drive mechanism 22, but at least one of the rear wheel 14A and the front wheel 14B can also be connected to the crank 12 via the drive mechanism 22.

The human-powered vehicle 10 includes a battery 36 for human-powered vehicles. The battery 36 includes one or more battery elements. The battery element includes a rechargeable battery (secondary battery). The battery 36 supplies power to the motor 42 of the auxiliary system 40. The battery 36 is preferably connected to the control device of the motor 42 by wired or wireless communication. The battery 36 can communicate with the control device of the motor 42, for example, by power line communication (PLC; power line communication).

The auxiliary system 40 includes a transmission device 50 and a motor 42 that assists human driving force. The motor 42 provides propulsion force to the human-driven vehicle 10 . The motor 42 includes one or a plurality of electric motors. Motor 42 series It is configured to transmit rotation on at least one of the power transmission path of the human driving force from the pedal 20 to the rear wheel 14A and the front wheel 14B. The power transmission path of the human driving force from the pedal 20 to the rear wheel 14A includes the rear wheel 14A. The motor 42 of this embodiment is installed on the frame 18 of the human-powered vehicle 10 and is configured to transmit rotation to the first rotating body 24 . The drive unit is composed of a motor 42 and a housing in which the motor 42 is installed. A one-way clutch should be provided in the power transmission path between the motor 42 and the crankshaft 12A so that the motor 42 will not rotate due to the rotational force of the crank 12 when the crankshaft 12A rotates in the forward direction of the human-driven vehicle 10 . When the motor 42 is provided on at least one of the rear wheel 14A and the front wheel 14B, the motor 42 may also include a hub motor.

It is preferable that the assist system 40 further includes an operating unit 44 that is manually operated in order to operate the transmission 50 . The transmission device 50 changes the transmission ratio of the human-driven vehicle 10 according to the operation of the operating part 44 . The speed change ratio is the ratio of the rotational speed of the rear wheel 14A to the rotational speed of the crank 12 (first rotating body 24). The operation part 44 is provided on the handle 34, for example. The operating part 44 is preferably connected to the Bowden Cable through the transmission device 50 . By operating the operating part 44, the internal cable of the Bourdon cable moves and the transmission device 50 operates, thereby changing the transmission ratio. The transmission device 50 may also include a motor for changing the transmission ratio. At this time, the operation part 44 and the motor of the transmission device 50 are configured to communicate through wired communication or wireless communication.

As shown in FIG. 3 , the transmission device 50 includes a first transmission unit 52 , a second transmission unit 54 , and a switching unit 56 that changes the transmission ratio of the human-driven vehicle 10 in steps. The first speed change unit 52 has a first speed change path L1 that changes the input rotation speed. The second speed change unit 54 has a second speed change path L2 that changes the input rotation speed, and is configured to transmit the rotation to the first speed change unit 52 . The transmission 50 further includes a shaft member 58 . The axle member 58 is supported by the hub axle of the vehicle frame 18 . The first speed change unit 52 and the second speed change unit 54 are provided on the shaft member 58 so as to be adjacent to each other in the axial direction of the shaft member 58 .

The first transmission unit 52 has a first planetary gear unit 60. The first planetary gear unit 60 preferably has: at least two first sun gears 62, at least one first annular gear 64, at least two first planetary gears 66, and a first carrier 68. The at least two first planetary gears 66 are respectively engaged with the at least two first sun gears 62. The first carrier 68 can support the at least two first planetary gears 66 movably around the corresponding first sun gears 62. The first planetary gear unit 60 of this embodiment has: two first sun gears 62, one first annular gear 64, and two first planetary gears 66. The first sun gear 62 includes: a first sun gear 62A and a first sun gear 62B. The two first planetary gears 66 include a first planetary gear 66A meshing with the first sun gear 62A, and a first planetary gear 66B meshing with the first sun gear 62B.

The first planetary gear 66A and the first planetary gear 66B are integrated to form a stepped first planetary gear 66C. The first planetary gear unit 60 preferably has a plurality of first planetary gears 66C. For example, the first planetary gear unit 60 has four first planetary gears 66C. The first carrier 68 has: a first portion 68A that penetrates the plurality of first planetary gears 66C respectively; a second portion 68B that integrally supports the first portion 68A on one side in the axial direction of the first planetary gears 66C; and a second portion 68B on the first planetary gear. The other side in the axial direction of 66C integrally supports the third part 68C of the first part 68A. The first portion 68A rotatably supports the first planet gear 66C. The first part 68A may also be configured to rotate relative to the second part 68B and the third part 68C.

The first sun gear 62A has fewer teeth than the first sun gear 62B. The first planetary gear 66A has more teeth than the first planetary gear 66B. The speed ratio when the rotation input to the first planetary gear unit 60 is output through the first sun gear 62A is smaller than the speed ratio when the rotation input to the first planetary gear unit 60 is output through the first sun gear 62B. At least two first sun gears 62 are preferably arranged in the axial direction of the shaft member 58, with the first sun gear 62 having a larger number of teeth as it moves away from the second speed change unit 54. The first sun gear 62A of this embodiment is not arranged at the first sun gear 62B in the axial direction of the shaft member 58, but at a position away from the second speed change unit 54.

The second transmission unit 54 preferably has a second planetary gear unit 70 . The second planetary gear unit 70 includes at least one second sun gear 72 , at least one second ring gear 74 , at least one second planetary gear 76 , and a second carrier 78 . At least one second planetary gear 76 meshes with at least one second sun gear 72 . The second carrier 78 supports the second planet gears 76 movably around at least one second sun gear 72 . The second planetary gear unit 70 of this embodiment includes a second sun gear 72 , a second ring gear 74 , and a second planetary gear 76 .

The second planetary gear 76 is provided on the second planetary gear 76A. The second planetary gear unit 70 preferably has a plurality of second planetary gears 76A. For example, the second planetary gear unit 70 has four second planetary gears 76A. The second carrier 78 has: a first portion 78A penetrating through the plurality of second planetary gears 76A; a second portion 78B integrally supporting the first portion 78A on one side of the axial direction of the second planetary gear 76A; and a third portion 78C integrally supporting the first portion 78A on the other side of the axial direction of the second planetary gear 76A. The first portion 78A can support the second planetary gear 76A rotatably relative to the second planetary gear 76A. The first portion 78A can also be configured to be rotatable relative to the second portion 78B and the third portion 78C.

The number of teeth of the second sun gear 72 is equal to the number of teeth of the first sun gear 62B. The number of teeth of the second ring gear 74 is equal to the number of teeth of the first ring gear 64 . The number of teeth of the second sun gear 72 may also be greater than the number of teeth of the first sun gear 62B. The number of teeth may be smaller than that of first sun gear 62B. The number of teeth of the second sun gear 72 may be equal to the number of teeth of the first sun gear 62A, may be greater than the number of teeth of the first sun gear 62A, or may be less than the number of teeth of the first sun gear 62A. The number of teeth of at least two first sun gears 62 and the number of teeth of at least one second sun gear 72 is determined according to the transmission ratio required by the transmission device 50 .

It is preferable that the transmission 50 further includes a transmission unit 80 . The first carrier 68 and the second ring gear 74 are connected through the transmission part 80 . As shown in FIG. 3 , the transmission portion 80 includes one of a recessed portion 80A and a convex portion 80B provided on one of the outer peripheral portion of the first carrier 68 and the inner peripheral portion of the second ring gear 74 ; The other of the outer peripheral portion and the inner peripheral portion of the second ring gear 74 is the concave portion 80A and the other of the convex portion 80B. The circumferential length of the recessed portion 80A is larger than the circumferential length of the convex portion 80B. The transmission portion 80 is provided on the outer peripheral portion of the second portion 68B of the first carrier 68 and the inner peripheral portion of the second ring gear 74 .

It is preferable that the transmission device 50 further includes a first one-way clutch 82 (see FIG. 2 ). The first carrier 68 and the second carrier 78 are connected by a first one-way clutch 82 . The first one-way clutch 82 is provided between the inner peripheral portion of the second portion 68B of the first carrier 68 and the outer peripheral portion of the third portion 78C of the second carrier 78 . The first one-way clutch 82 transmits the rotation of the second carrier 78 to the first carrier 68 without transmitting the rotation of the first carrier 68 to the second carrier 78 .

The speed change device 50 preferably further includes: an output body 84, a second one-way clutch 86, and a third one-way clutch 88. The first annular gear 64 is connected to the output body 84 via the second one-way clutch 86. The second annular gear 74 is connected to the output body 84 via the third one-way clutch 88.

The transmission device 50 further includes a hub 90 that accommodates the first transmission unit 52 , the second transmission unit 54 , and the switching unit 56 . The hub 90 rotates integrally with the output body 84 . The output body 84 is provided on the inner circumference of the hub 90 . The output body 84 rotates integrally with the hub 90 by, for example, spline fitting or serration fitting. The output body 84 and the hub 90 may also be formed integrally. On the outer peripheral portion of the hub 90, flanges 92 are respectively provided at both ends of the hub 90 in the axial direction. Holes 92A are formed in the flange 92 to engage with the spokes of the rear wheel 14A.

The second one-way clutch 86 is provided between the outer peripheral portion of the first ring gear 64 and the inner peripheral portion of the output body 84 . The second one-way clutch 86 transmits the rotation of the first ring gear 64 to the output body 84 without transmitting the rotation of the output body 84 to the first ring gear 64 .

The third one-way clutch 88 is provided between the outer peripheral portion of the second ring gear 74 and the inner peripheral portion of the output body 84 . The third one-way clutch 88 transmits the rotation of the second ring gear 74 to the output body 84 without transmitting the rotation of the output body 84 to the second ring gear 74 .

The transmission 50 further includes an input body 94 . The input body 94 is provided on the shaft member 58 so as to be rotatable with respect to the shaft member 58 . The input body 94 transmits the rotation of the second rotating body 26 to the second speed change unit 54 . One end of the input body 94 in the axial direction of the shaft member 58 is connected to the second rotating body 26 . The other end of the input body 94 in the axial direction of the shaft member 58 is connected to the outer peripheral portion of the second portion 78B of the second carrier 78 . The rotation of the input body 94 is output from the second speed change unit 54 to the output body 84 , or is output from the second speed change unit 54 and the first speed change unit 52 to the output body 84 .

The switching unit 56 switches the transmission path S for inputting the rotation of the first transmission unit 52 and the second transmission unit 54 by changing the rotation state of at least one of the first transmission unit 52 and the second transmission unit 54.

The transmission path S at least includes: a first transmission path S1 passing through the first speed change path L1; a second transmission path S2 passing through the second speed change path L2 but not through the first speed change path L1; and a third transmission path S3 passing through both the first speed change path L1 and the second speed change path L2. When the switching unit 56 increases the speed ratio in stages, the transmission path S is switched in the order of the first transmission path S1, the second transmission path S2, and the third transmission path S3.

The first speed change path L1 includes a first path L11 and a second path L12. When the transmission path S passes through the first speed change path L1, the switching unit 56 is configured to switch the transmission path S from one of the first speed change path L1 including the first path L11 and the first speed change path L1 including the second path L12 to the other. In at least one of the first transmission path S1 and the third transmission path S3, the switching unit 56 is configured to switch from one of the first speed change path L1 including the first path L11 and the first speed change path L1 including the second path L12 to the other. In each of the first transmission path S1 and the third transmission path S3, the speed ratio when the first speed change path L1 includes the second path L12 is greater than the speed ratio when the first speed change path L1 includes the first path L11.

The transmission path S further has a fourth transmission path S4 that transmits the input rotation without changing the speed. When the gear ratio is increased in steps, the switching unit 56 switches the transmission path S in the order of the fourth transmission path S4, the first transmission path S1, the second transmission path S2, and the third transmission path S3. None of the fourth transmission path S4 passes through the first speed change path L1 and the second speed change path L2.

Table 1 shows the transmission path S in each transmission stage formed by the transmission device 50 of this embodiment. The speed ratio in each speed change stage increases in the order of the first speed change stage, the second speed change stage, the third speed change stage, the fourth speed change stage, and the fifth speed change stage. The switching unit 56 of this embodiment switches the third transmission path S3 from one of the first transmission path L1 including the first path L11 and the first transmission path L1 including the second path L12 to the other. composition. In this embodiment, when switching from one of the fourth speed change stage and the fifth speed change stage to the other of the fourth speed change stage and the fifth speed change stage, the switching unit 56 switches from the first speed change path L1 including the first path L11 , and one of the first transmission path L1 including the second path L12 is configured to switch the transmission path S to the other one.

The speed ratio of the first speed change unit 52 in the first transmission path S1, which corresponds to a speed ratio that is one step smaller than the speed ratio of the second transmission path S2, is preferably smaller than the speed ratio of the second transmission path S2. In this embodiment, the speed change ratio of the first planetary gear unit 60 when passing through the first sun gear 62A is smaller than the speed change ratio of the second planetary gear unit 70 when passing through the second sun gear 72 .

The switching unit 56 includes a claw member 96 , an arm member 98 , and a biasing member 100 . The claw members 96 are respectively provided corresponding to at least two first sun gears 62 and at least one second sun gear 72 .

The claw member 96 is provided on the outer peripheral portion of the shaft member 58 so as to be movable relative to the shaft member 58 . The claw member 96 has a first claw member 96A, a second claw member 96B, and a third claw member 96C. The first claw member 96A is arranged between the outer peripheral portion of the shaft member 58 and the inner peripheral portion of the first sun gear 62A. The second claw member 96B is arranged between the outer peripheral portion of the shaft member 58 and the inner peripheral portion of the first sun gear 62B. The third claw member 96C is arranged between the outer peripheral portion of the shaft member 58 and the inner peripheral portion of the second sun gear 72 .

The arm member 98 is provided on the outer peripheral portion of the shaft member 58 so as to be rotatable with respect to the shaft member 58 . The arm member 98 has a base part 98A, a first arm 98B, a second arm 98C, and a third arm 98D. The base portion 98A extends in the axial direction of the shaft member 58 .

The switching unit 56 includes a first switching unit 56A, a second switching unit 56B, and a third switching unit 56C. The first switching part 56A includes a first claw member 96A and a first arm 98B. The second switching part 56B includes a second claw member 96B and a second arm 98C. The third switching part 56C includes a third claw member 96C and a third arm 98D.

The force member 100 is provided corresponding to each claw member 96, and the force member 100 applies force to each claw member 96 in the direction in which the protrusion amount of each claw member 96 from the shaft member 58 increases. Each claw member 96 includes: a first state in which the protrusion amount of each claw member 96 from the shaft member 58 is small; and a second state in which the protrusion amount of each claw member 96 from the shaft member 58 is large. The arm member 98 is configured to rotate around the shaft member 58 according to the operation of the operating part 44. By rotating the arm member 98 around the shaft member 58, the claw member 96 changes from one of the first state and the second state to the other of the first state and the second state.

The first arm 98B forms the second state by pressing the first claw member 96A against the shaft member 58. In the first state, the first claw member 96A does not engage with the recess 102 provided on the inner circumference of the first sun gear 62A, and allows the first sun gear 62A to rotate about the shaft member 58. In the second state, the first claw member 96A engages with the recess 102 provided on the inner circumference of the first sun gear 62A, and controls the rotation of the first sun gear 62A about the shaft member 58.

The second arm 98C forms the second state by pressing the second claw member 96B against the shaft member 58 . When the second claw member 96B is in the first state, it does not mesh with the recess 102 provided on the inner circumference of the first sun gear 62B, and allows the first sun gear 62B to rotate relative to the shaft member 58 . When the second claw member 96B is in the second state, it meshes with the recess 102 provided on the inner circumference of the first sun gear 62B to control the rotation of the first sun gear 62B with respect to the shaft member 58 .

The third arm 98D forms the second state by pressing the third claw member 96C against the shaft member 58 . When the third claw member 96C is in the first state, it does not mesh with the recess 102 provided on the inner circumference of the second sun gear 72 and allows the second sun gear 72 to rotate relative to the shaft member 58 . When the third claw member 96C is in the second state, it meshes with the recess 102 provided on the inner circumference of the second sun gear 72 to control the rotation of the second sun gear 72 with respect to the shaft member 58 .

The first arm 98B, the second arm 98C, and the third arm 98D are configured so that the corresponding claw member 96 becomes the first state or the second state in the rotation phase of the shaft member 58 . In this embodiment, the rotation phases of the arm member 98 relative to the shaft member 58 include: a first rotation phase R1, a second rotation phase R2, a third rotation phase R3, a fourth rotation phase R4, and a fifth rotation phase R5. When the rotational phase is the first rotational phase R1, the transmission device 50 forms the first transmission stage. When the rotational phase is the second rotational phase R2, the transmission device 50 forms a second transmission stage. When the rotational phase is the third rotational phase R3, the transmission device 50 forms a third transmission stage. When the rotational phase is the fourth rotational phase R4, the transmission device 50 forms the fourth transmission stage. When the rotational phase is the fifth rotational phase R5, the transmission device 50 forms the fifth transmission stage.

The switching unit 56 is configured so that the transmission path S passes through at least one of the two first sun gears 62 by changing the rotational state of the at least two first sun gears 62 . The first path L11 passes through at least one of the two first sun gears 62 , and the second path L12 passes through at least one of the two first sun gears 62 that is different from the first sun gear 62 passed through in the first path L11 . For example, the first path L11 passes through the first sun gear 62A, and the second path L12 passes through the first sun gear 62B. The switching unit 56 sets the first claw member 96A to the second state and the second claw member 96B to the first state, so that the transmission path S can pass through the first sun gear 62A. The switching unit 56 sets the first claw member 96A to the first state and the second claw member 96B to the second state, so that the transmission path S can pass through the first sun gear 62B.

The switching unit 56 is configured such that the transmission path S passes through at least one of the second sun gears 72 by changing the rotational state of at least one second sun gear 72 . The switching part 56 sets the third claw member 96C to the second state so that the transmission path S can pass through the second sun gear 72 .

The switching unit 56 is configured to change the rotation state of at least two first sun gears 62 after changing the rotation state of at least one second sun gear 72 when the transmission path S is switched from the first transmission path S1 to the second transmission path S2 when the speed ratio is increased in stages. The second arm 98C is configured to change the state of the third claw member 96C to the second state between the second rotation phase R2 and the third rotation phase R3, and the first arm 98B is configured to change the state of the first claw member 96A to the first state in the third rotation phase R3. After controlling the rotation of the second solar gear 72 on the shaft member 58, since the first solar gear 62 is allowed to rotate on the shaft member 58, it is not easy to form a state where both the second solar gear 72 and the first solar gear 62 are allowed to rotate on the shaft member 58. Therefore, the speed change stage can be appropriately changed.

Table 2 shows the rotational states of the first sun gear 62A, the first sun gear 62B, and the second sun gear 72 in each speed change stage formed by the arm member 98 of this embodiment.

In the fourth transmission path S4 shown in FIG. 12 , the rotation of the second carrier 78 causes the first carrier 68 to rotate via the first one-way clutch 82, and the rotation of the first carrier 68 causes the second annular gear 74 to rotate via the transmission unit 80. In the fourth transmission path S4, both the first sun gear 62 and the second sun gear 72 allow the shaft member 58 to rotate. Therefore, the rotation input from the input body 94 to the first speed change unit 52 is not changed in speed, but is output to the output body 84 via the third one-way clutch 88.

In the first transmission path S1 shown in FIG. 13 , the rotation of the second carrier 78 causes the first carrier 68 to rotate through the first one-way clutch 82 . In the third transmission path S3 , the rotation of the second ring gear 74 passes through the transmission part. 80 to cause the first carrier 68 to rotate.

In the first transmission path S1, since the second sun gear 72 allows the counter shaft member 58 to rotate, the rotation input from the input body 94 to the second speed change unit 54 is not speed-changed, but is input to the first speed change unit via the first one-way clutch 82 52. The rotation input to the first speed change unit 52 is accelerated by a speed change ratio according to the number of teeth of the first sun gear 62A that controls the rotation, and is output to the output body 84 via the second one-way clutch 86 . In the first transmission path S1 , the second ring gear 74 rotates the first carrier 68 via the transmission part 80 .

In the second transmission path S2 shown in FIG. 14 , since the second sun gear 72 controls the rotation of the shaft member 58 , the rotational speed of the second speed change unit 54 is input from the input body 94 and passes through the third one-way clutch. 88 is output to output body 84. In the second transmission path S2, since all the first sun gears 62 allow the counter shaft member 58 to rotate, the rotation of the output body 84 is not transmitted to the first transmission unit 52 through the second one-way clutch 86.

As shown in FIG10 , in the first transmission path S1 shown in FIG13 , since the second solar gear 72 is allowed to rotate relative to the shaft member 58, the rotation of the first carrier 68 causes the second annular gear 74 to rotate. Since the rotation speeds of the first carrier 68 and the second annular gear 74 are slower than the rotation speeds of the first annular gear 64 and the output body 84, the third one-way clutch 88 allows the second annular gear 74 and the output body 84 to rotate relative to each other.

In the state of FIG. 10 , the switching part 56 changes from a state that allows the second sun gear 72 to rotate against the shaft member 58 to a state that controls the rotation of the shaft member 58 . The rotation speed of the second ring gear 74 is faster than that of the first carrier 68 The rotation speed is large. Therefore, the convex portion 80B moves relatively in the recessed portion 80A, and the second ring gear 74 and the first carrier 68 start to rotate relative to each other. In this state, the speed ratio of the first speed change unit 52 when passing through the first sun gear 62A is higher than the speed ratio of the second speed change unit 54 when passing through the second sun gear 72 . small, the rotation speed of the second ring gear 74 is faster than the rotation speed of the first ring gear 64 . Therefore, the rotation of the second ring gear 74 causes the output body 84 to rotate through the third one-way clutch 88 , and the second one-way clutch 86 allows the first ring gear 64 and the output body 84 to rotate relative to each other. In this state, the switching unit 56 changes the rotation of the first sun gear 62A with respect to the shaft member 58 from the controlled state to the permitted state. Since the first ring gear 64 and the output body 84 are allowed to rotate relative to each other, the rotational state of the first sun gear 62A can be appropriately changed when the load on the first sun gear 62A is small.

As shown in FIG. 11 , in the concave portion 80A, when the convex portion 80B reaches the end on the opposite side of the rotation direction, the rotation of the second ring gear 74 can cause the first carrier 68 to rotate. Therefore, in the second transmission path S2 shown in FIG. 14 , the rotation of the second carrier 78 is not transmitted to the first carrier 68 through the first one-way clutch 82 .

In the third transmission path S3 shown in FIG. 15 , in order to control the rotation of the shaft member 58 , the second sun gear 72 inputs the rotational speed increase of the second speed change unit 54 from the input body 94 and inputs the first rotation speed through the transmission part 80 . Transmission unit 52. The rotation input to the first speed change unit 52 is accelerated by a speed change ratio according to the number of teeth of the first sun gear 62A that controls the rotation, and is output to the output body 84 via the second one-way clutch 86 .

In the third transmission path S3 shown in FIG16 , the second sun gear 72 increases the speed of the rotation of the second transmission unit 54 input from the input body 94 in order to control the rotation of the shaft member 58, and inputs it to the first transmission unit 52 through the transmission unit 80. The rotation of the first transmission unit 52 is increased by the speed ratio according to the number of teeth of the first sun gear 62B that controls the rotation, and is output to the output body 84 through the second one-way clutch 86.

<Second implementation form>

A transmission device 50A according to the second embodiment will be described with reference to FIGS. 17 to 25 . The speed change device 50A of the second embodiment is the same as that of the first embodiment except that the speed change stage is composed of eight stages. The speed change device 50 is the same. Therefore, the same reference numerals as those in the first embodiment are assigned to the components common to the first embodiment, and repeated descriptions are omitted.

As shown in FIG. 18 , the transmission device 50A includes a first transmission unit 52A, a second transmission unit 54, and a switching unit 56 that changes the transmission ratio of the human-driven vehicle 10 in steps. The first speed change unit 52A has a first speed change path L1 for changing input rotation speed. The second speed change unit 54 has a second speed change path L2 that changes the input rotation speed, and can transmit the rotation to the first speed change unit 52A.

The first speed change unit 52A has a first planetary gear unit 60A. The first planetary gear unit 60A preferably has: at least 2 first sun gears 62, at least 1 first annular gear 64, at least 2 first planetary gears 66, and a first carrier 68. The at least 2 first planetary gears 66 are respectively engaged with the at least 2 first sun gears 62. The first carrier 68 supports at least 2 first planetary gears 66 that can move around the corresponding first sun gears 62. The first planetary gear unit 60A of this embodiment has at least 3 first sun gears 62. The first planetary gear unit 60A of this embodiment has: 3 first sun gears 62, 1 first annular gear 64, and 3 first planetary gears 66. The first sun gear 62 includes: a first sun gear 62A, a first sun gear 62B, and a first sun gear 62C. The three first planetary gears 66 include: a first planetary gear 66A meshing with the first sun gear 62A; a first planetary gear 66B meshing with the first sun gear 62B; and a first planetary gear 66D meshing with the first sun gear 62C.

The first planetary gear 66A, the first planetary gear 66B, and the first planetary gear 66D are integrally formed to form a stepped first planetary gear body 66E. The first planetary gear unit 60A preferably has a plurality of first planetary gear bodies 66E. For example, the first planetary gear unit 60A has four first planetary gear bodies 66E. The first carrier 68 has: a first portion 68A that penetrates the plurality of first planetary gear bodies 66E respectively; a second portion 68B that integrally supports the first portion 68A on one side in the axial direction of the first planetary gear body 66E; and The other side of the planetary gear body 66E in the axial direction integrally supports the first portion 68A. Part III 68C. The first portion 68A rotatably supports the first planetary gear body 66E. The first part 68A may also be configured to rotate relative to the second part 68B and the third part 68C.

The number of teeth of the first sun gear 62B is less than the number of teeth of the first sun gear 62C. The number of teeth of the first planetary gear 66B is greater than the number of teeth of the first planetary gear 66D. The speed ratio when the rotation input to the first planetary gear unit 60A is output through the first sun gear 62B is smaller than the speed ratio when the rotation input to the first planetary gear unit 60A is output through the first sun gear 62C. At least three first sun gears 62 are preferably arranged in the axial direction of the shaft member 58, with the first sun gear 62 having a larger number of teeth as it moves from the side close to the second speed change unit 54 toward the side away from the second speed change unit 54. The first sun gear 62B of this embodiment is arranged in the axial direction of the shaft member 58, not at the first sun gear 62C but at a position away from the second speed change unit 54.

In this embodiment, the number of teeth of the second sun gear 72 is preferably greater than the number of teeth of the first sun gear 62C, and the number of teeth of the second ring gear 74 is equal to the number of teeth of the first ring gear 64 . The number of teeth of the second sun gear 72 may be less than the number of teeth of the first sun gear 62C, or may be equal to the number of teeth of the first sun gear 62C. The number of teeth of the second sun gear 72 may be equal to the number of teeth of the first sun gear 62A, may be greater than the number of teeth of the first sun gear 62A, or may be less than the number of teeth of the first sun gear 62A. The number of teeth of the second sun gear 72 may be equal to the number of teeth of the first sun gear 62B, may be greater than the number of teeth of the first sun gear 62B, or may be less than the number of teeth of the first sun gear 62B. The number of teeth of at least three first sun gears 62 and the number of teeth of at least one second sun gear 72 is determined according to the transmission ratio required by the transmission device 50A.

It is preferable that the transmission 50A further includes a transmission part 80 , a first one-way clutch 82 , an output body 84 , a second one-way clutch 86 , and a third one-way clutch 88 . It is preferable that the transmission device 50A further includes a hub 90 that accommodates the first transmission unit 52A, the second transmission unit 54, and the switching part 56. It is preferable that the transmission device 50A further includes an input body 94 . The rotation of the input body 94 is output from the second speed change unit 54 to the output body 84 , or from the second speed change unit 54 and the first speed change unit 52A to the output body 84 .

The switching unit 56 switches the transmission path S for inputting the rotation of the first transmission unit 52A and the second transmission unit 54 from one transmission path S to another transmission path S by changing the rotation state of at least one of the first transmission unit 52A and the second transmission unit 54.

The first transmission path L1 of this embodiment further has a third path L13. The switching unit 56 switches from one of the first transmission path L1 including the second path L12 and the first transmission path L1 including the third path L13 in at least one of the first transmission path S1 and the third transmission path S3. Switch to the other side's approach to composition. In each of the first transmission path S1 and the third transmission path S3, the speed ratio when the first transmission path L1 includes the third path L13 is larger than the speed ratio when the first transmission path L1 includes the second path L12. The third path L13 passes through a first sun gear 62 that is different from the first sun gear 62 passed through the first path L11 and the second path L12 among the at least three first sun gears 62 . The third path L13 of this embodiment passes through the first sun gear 62C.

Table 3 shows the transmission path S in each speed change stage formed by the speed change device 50 of this embodiment. The speed ratio in each speed change stage increases in the order of the first speed change stage, the second speed change stage, the third speed change stage, the fourth speed change stage, the fifth speed change stage, the sixth speed change stage, the seventh speed change stage, and the eighth speed change stage.

In the first transmission path S1 and the third transmission path S3, the switching unit 56 of this embodiment switches from the first transmission path L1 including the first path L11 to the first transmission path L1 including the second path L12. Switch to the other side. In this embodiment, when switching from one of the second speed change stage and the third speed change stage to the other of the second speed change stage and the third speed change stage, the switching unit 56 switches from the first speed change path L1 including the first path L11 , and one of the first transmission path L1 including the second path L12 is configured to switch the transmission path S to the other one. In this embodiment, when switching from one of the sixth speed change stage and the seventh speed change stage to the other of the sixth speed change stage and the seventh speed change stage, the switch The portion 56 is configured to switch the transmission path S from one of the first transmission path L1 including the first path L11 and the first transmission path L1 including the second path L12 to the other.

The switching unit 56 of this embodiment switches from the first transmission path L1 including the second path L12 to the first transmission path L1 including the third path L13 in the first transmission path S1 and the third transmission path S3. Switch to the other side. In this embodiment, when switching from one of the third speed change stage and the fourth speed change stage to the other of the third speed change stage and the fourth speed change stage, the switching unit 56 switches from the first speed change path L1 including the second path L12 , and one side of the first speed change path L1 including the third path L13 is configured to switch the transmission path S to the other side. In this embodiment, when switching from one of the seventh speed change stage and the eighth speed change stage to the other of the seventh speed change stage and the eighth speed change stage, the switching unit 56 switches from the first speed change path L1 including the second path L12 , and one side of the first speed change path L1 including the third path L13 is configured to switch the transmission path S to the other side.

The speed ratio of the first transmission unit 52 in the first transmission path S1 corresponding to the speed ratio that is one stage smaller than the speed ratio of the second transmission path S2 should be smaller than the speed ratio of the second transmission path S2. In this embodiment, the speed ratio of the first planetary gear unit 60 through the first sun gear 62C is smaller than the speed ratio of the second planetary gear unit 70 through the second sun gear 72.

The first transmission path L1 has a plurality of paths with different transmission ratios. When the transmission path S passes through the first transmission path L1, the switching unit 56 switches from the first transmission path L1 including one of the plurality of paths and the first transmission path L1 including the other one of the plurality of paths. One party switches the aforementioned transmission path to the other party. When the switching unit 56 increases the speed ratio step by step, in the speed change stage formed by passing through the transmission path S including the first speed change path L1 that forms the first speed ratio among the plurality of paths; Among the paths, the speed change stages formed by the transmission path S forming the first speed change path L1 with a speed ratio smaller than the first speed change ratio include the speed change formed by not passing through the transmission path S of the first speed change path L1 stage. The path forming the first transmission ratio among the plurality of paths should preferably correspond to the path forming the maximum transmission ratio among the plurality of paths. The path among the plurality of paths that forms a gear ratio smaller than the first gear ratio should preferably correspond to the path among the plurality of paths that forms the minimum gear ratio. In this embodiment, the path forming the first speed ratio among the plurality of paths corresponds to the third path L13, and the path forming the speed ratio smaller than the first speed ratio among the plurality of paths corresponds to the first path L11. In this embodiment, the transmission path S formed by the transmission path S including the first transmission path L1 among the plurality of paths forming the first transmission ratio corresponds to the fourth transmission stage. The shift stage formed by passing through the transmission path S forming the first shift path L1 with a smaller shift ratio than the first shift ratio among the plurality of paths corresponds to the sixth shift stage. The shifting stage formed by the transmission path S not passing through the first shifting path L1 corresponds to the fifth shifting stage.

The switching unit 56 includes a claw member 96 , an arm member 104 , and a biasing member 100 . The claw member 96 further has a fourth claw member disposed between the outer peripheral portion of the shaft member 58 and the inner peripheral portion of the first sun gear 62C.

The arm member 104 shown in FIG. 17 is rotatably disposed on the outer periphery of the shaft member 58. The arm member 104 has a base portion 104A, a first arm 104B, a second arm 104C, a third arm 104D, and a fourth arm 104E. The base portion 104A extends in the axial direction of the shaft member 58.

The switching unit 56 includes: a first switching unit 56A, a second switching unit 56B, and a third switching unit 56C. The first switching unit 56A includes a first claw member 96A and a first arm 104B. The second switching unit 56B includes a second claw member 96B and a second arm 104C. The third switching unit 56C includes a third claw member 96C and a third arm 104D. The fourth switching unit 56D includes a fourth claw member and a fourth arm 104E.

The first arm 104B forms the second state by pressing the first claw member 96A against the shaft member 58 . When the first pawl member 96A is in the first state, it does not mesh with the recess 102 provided in the inner circumference of the first sun gear 62A, and allows the first sun gear 62A to rotate relative to the shaft member 58 . When the first pawl member 96A is in the second state, it meshes with the recess 102 provided on the inner circumference of the first sun gear 62A to control the rotation of the first sun gear 62A with respect to the shaft member 58 .

The second arm 104C forms the second state by pressing the second claw member 96B against the shaft member 58. In the first state, the second claw member 96B does not engage with the recess 102 provided on the inner circumference of the first sun gear 62B, allowing the first sun gear 62B to rotate about the shaft member 58. In the second state, the second claw member 96B engages with the recess 102 provided on the inner circumference of the first sun gear 62B, controlling the rotation of the first sun gear 62B about the shaft member 58.

The third arm 104D presses the third claw member 96C against the shaft member 58 to form the second state. When the third claw member 96C is in the first state, it is not in contact with the recess 102 provided on the inner circumference of the second sun gear 72 Engagement allows second sun gear 72 to rotate on shaft member 58 . When the third claw member 96C is in the second state, it meshes with the recess 102 provided on the inner circumference of the second sun gear 72 to control the rotation of the second sun gear 72 with respect to the shaft member 58 .

The fourth arm 104E forms the second state by pressing the fourth claw member against the shaft member 58. In the first state, the fourth claw member does not engage with the recess 102 provided on the inner circumference of the first sun gear 62C, allowing the first sun gear 62C to rotate against the shaft member 58. In the second state, the fourth claw member engages with the recess 102 provided on the inner circumference of the first sun gear 62C, controlling the rotation of the first sun gear 62C against the shaft member 58.

The first arm 104B, the second arm 104C, the third arm 104D, and the fourth arm 104E are configured in such a way that the corresponding claw member 96 becomes the first state or the second state in the rotation phase of the shaft member 58. In this embodiment, the rotation phase of the arm member 104 with respect to the shaft member 58 includes: the first rotation phase Q1, the second rotation phase Q2, the third rotation phase Q3, the fourth rotation phase Q4, the fifth rotation phase Q5, the sixth rotation phase Q6, the seventh rotation phase Q7, and the eighth rotation phase Q8. When the rotation phase is the first rotation phase Q1, the speed change device 50A forms the first speed change stage. When the rotation phase is the second rotation phase Q2, the speed change device 50A forms the second speed change stage. When the rotation phase is the third rotation phase Q3, the speed change device 50A forms the third speed change stage. When the rotation phase is the fourth rotation phase Q4, the transmission device 50A forms the fourth speed change stage. When the rotation phase is the fifth rotation phase Q5, the transmission device 50A forms the fifth speed change stage. When the rotation phase is the sixth rotation phase Q6, the transmission device 50A forms the sixth speed change stage. When the rotation phase is the seventh rotation phase Q7, the transmission device 50A forms the seventh speed change stage. When the rotation phase is the eighth rotation phase Q8, the transmission device 50A forms the eighth speed change stage.

The switching unit 56 is configured such that the transmission path S passes through at least one of the two first sun gears 62 by changing the rotational state of the first sun gear 62 . The first path L11 passes through at least 2 first There is one sun gear 62 , and the second path L12 passes through one different first sun gear 62 than the first sun gear 62 that passes through the first path L11 among the at least two first sun gears 62 . For example, the first path L11 passes through the first sun gear 62A, the second path L12 passes through the first sun gear 62B, and the third path L13 passes through the first sun gear 62C. The switching unit 56 sets the first claw member 96A to the second state, the second claw member 96B to the first state, and the fourth claw member to the first state, so that the transmission path S can pass through the first sun gear 62A. The switching unit 56 sets the first claw member 96A to the first state, the second claw member 96B to the second state, and the fourth claw member to the first state, so that the transmission path S can pass through the first sun gear 62B. The switching unit 56 sets the first claw member 96A to the first state, the second claw member 96B to the first state, and the fourth claw member to the second state, so that the transmission path S can pass through the first sun gear 62C.

When the switching unit 56 increases the gear ratio in steps and switches the transmission path S from the first transmission path S1 to the second transmission path S2, the switching unit 56 changes the rotational state of at least one second sun gear 72 and then changes at least The two first sun gears 62 are configured in a rotating state. The second arm 104C is configured such that the state of the fourth claw member changes to the second state between the fourth rotation phase Q4 and the fifth rotation phase Q5, and the first arm 104B is in the fifth rotation phase Q5. The claw member 96A is configured so that the state becomes the first state.

Table 4 shows the rotation states of the first sun gear 62A, the first sun gear 62B, the first sun gear 62C, and the second sun gear 72 in each speed change stage formed by the arm member 104 of this embodiment.

In the fourth transmission path S4 shown in FIG. 18 , the rotation of the second carrier 78 causes the first carrier 68 to rotate through the first one-way clutch 82 , and the rotation of the first carrier 68 causes the second ring gear 74 to rotate through the transmission part 80 . In the fourth transmission path S4, both the first sun gear 62 and the second sun gear 72 allow the shaft member 58 to rotate. Therefore, the rotational speed change of the first speed change unit 52 is not input from the input body 94 but is output to the output body 84 via the third one-way clutch 88 .

In the first transmission path S1 shown in FIG. 19 , FIG. 20 , and FIG. 21 , the rotation of the second carrier 78 causes the first carrier 68 to rotate via the first one-way clutch 82 , and in the third transmission path S3 , the rotation of the second annular gear 74 causes the first carrier 68 to rotate via the transmission portion 80 .

In the first transmission path S1, because the second sun gear 72 allows the rotation of the shaft member 58, the rotation input from the input body 94 to the first transmission unit 52 is not changed in speed, but is input to the second transmission unit 54 through the first one-way clutch 82.

In the first transmission path S1 shown in FIG. 19 , the rotation of the input second speed change unit 54 is accelerated by a speed change ratio according to the number of teeth of the first sun gear 62A that controls the rotation, and is output to the output via the second one-way clutch 86 Body 84. In the first transmission path S1 , the second ring gear 74 rotates the first carrier 68 via the transmission part 80 .

In the first transmission path S1 shown in FIG. 20 , the rotation of the input second speed change unit 54 is accelerated by a speed change ratio according to the number of teeth of the first sun gear 62B that regulates rotation, and is output to the output via the second one-way clutch 86 Body 84. In the first transmission path S1 , the second ring gear 74 rotates the first carrier 68 via the transmission part 80 .

In the first transmission path S1 shown in FIG. 21 , the rotation input to the second transmission unit 54 is accelerated by the speed ratio according to the number of teeth of the first sun gear 62C that controls the rotation, and is output to the output body 84 through the second one-way clutch 86. In the first transmission path S1, the second annular gear 74 rotates the first carrier 68 through the transmission part 80.

In the second transmission path S2 shown in FIG. 22 , since the rotation of the second sun gear 72 on the shaft member 58 is controlled, the rotation speed of the first speed change unit 52 is input from the input body 94 and is passed through the third one-way clutch. 88 is output to output body 84. In the second transmission path S2, since all the first sun gear 62 is allowed to rotate with respect to the shaft member 58, the rotation of the output body 84 is not transmitted to the first transmission unit 52 through the second one-way clutch 86.

As shown in FIG10 , in the first transmission path S1 shown in FIG21 , since the second solar gear 72 is allowed to rotate relative to the shaft member 58, the rotation of the first carrier 68 causes the second annular gear 74 to rotate. Since the rotation speeds of the first carrier 68 and the second annular gear 74 are slower than the rotation speeds of the first annular gear 64 and the output body 84, the second annular gear 74 and the output body 84 are allowed to rotate relative to each other via the third one-way clutch 88.

In the state of FIG. 10 , the switching part 56 changes the second sun gear 72 from a state that allows the rotation of the axis-aligning member 58 to a state that controls the rotation of the axis-aligning member 58 . The rotation speed of the second ring gear 74 is faster than that of the first carrier 68 The rotation speed is large. Therefore, the convex portion 80B moves relatively in the recessed portion 80A, and the second ring gear 74 and the first carrier 68 start to rotate relative to each other. In this state, because the speed ratio of the first speed change unit 52 when passing through the first sun gear 62C is smaller than the speed ratio of the second speed change unit 54 when passing through the second sun gear 72 , the second ring gear 74 rotates The speed is faster than the rotation speed of the first ring gear 64 . Therefore, the rotation of the second ring gear 74 causes the output body 84 to rotate through the third one-way clutch 88 , and allows the first ring gear 64 and the output body 84 to rotate relative to each other through the second one-way clutch 86 . In this state, the switching unit 56 changes the rotation of the first sun gear 62C with respect to the shaft member 58 from the controlled state to the permitted state. Since the first ring gear 64 and the output body 84 are allowed to rotate relative to each other, the rotational state of the first sun gear 62C can be appropriately changed when the load on the first sun gear 62A is small.

As shown in FIG11 , in the concave portion 80A, when the convex portion 80B reaches the end on the opposite side of the rotation direction, the rotation of the second annular gear 74 can cause the first carrier 68 to rotate. Therefore, in the second transmission path S2 shown in FIG22 , the rotation of the second carrier 78 is not transmitted to the first carrier 68 through the first one-way clutch 82.

In the third transmission path S3 shown in FIG. 23, since the rotation of the second solar gear 72 to the shaft member 58 is controlled, the rotation input from the input body 94 to the first transmission unit 52 is accelerated and input to the second transmission unit 54 through the transmission unit 80. The rotation input to the second transmission unit 54 is accelerated by the speed ratio according to the number of teeth of the first solar gear 62A that controls the rotation, and is output to the output body 84 through the second one-way clutch 86.

In the third transmission path S3 shown in FIG. 24 , since the rotation of the second sun gear 72 with respect to the shaft member 58 is controlled, the rotational acceleration of the first speed change unit 52 is input from the input body 94 and the third transmission unit 52 is input via the transmission unit 80 . Second speed change unit 54. The rotation input to the second speed change unit 54 is accelerated by a speed change ratio according to the number of teeth of the first sun gear 62B that controls the rotation, and is output to the output body 84 via the second one-way clutch 86 .

In the third transmission path S3 shown in FIG. 25 , since the rotation of the second sun gear 72 with respect to the shaft member 58 is controlled, the rotational acceleration of the first speed change unit 52 is input from the input body 94 and the third transmission unit 52 is input via the transmission unit 80 . Second speed change unit 54. The rotation input to the second speed change unit 54 is accelerated by a speed change ratio according to the number of teeth of the first sun gear 62C that controls the rotation, and is output to the output body 84 via the second one-way clutch 86 .

<Example of modification>

The description of the implementation form is an example of the form of the transmission device for a human-powered vehicle and the auxiliary system for a human-powered vehicle having the transmission device according to the present invention, and there is no intention to limit the form. According to the transmission device for a human-powered vehicle and the auxiliary system for a human-powered vehicle having the transmission device according to the present invention, for example, a modified example of the implementation form shown below and a form of combining two modified examples that do not contradict each other can be adopted. In the following modified examples, the same symbols as the implementation form are annotated for the parts shared with the implementation form, and their descriptions are omitted.

． The first sun gear 62 may also include more than four first sun gears 62 . At this time, the switching unit 56 is provided for all the first sun gears 62 .

． The second transmission unit 54 may also replace the second planetary gear unit 70, or may be a transmission having a planetary gear mechanism in addition to the second planetary gear unit 70. The transmission, for example, the second transmission unit 54 includes a manual transmission and a continuously variable transmission.

. The second planetary gear unit 70 may also be equipped with two or more second sun gears 72. In this case, the switching unit 56 is preferably configured to control the rotation of 0 or 1 of the second sun gears 72 included in the second planetary gear unit 70 relative to the shaft member 58 in each speed change stage.

． The speed change device 50 may be configured to change the speed of the rotation of the input crankshaft 12A and transmit it to the first rotating body 24 . At this time, the transmission device 50 may be provided on the crankshaft 12A.

． The transmission device 50, 50A can also be used in a human-driven vehicle 10 without a motor 42.

The expression "at least 1" used in this manual means that the desired options are "more than 1". An example is the expression "at least 1" used in this manual. When the number of options is 2, it means "only 1 option" or "both 2 options". Other examples are the expression "at least 1" used in this manual. When the number of options is 3 or more, it means "only 1 option" or "a combination of any 2 or more options".

50:Transmission device

52: First transmission unit

54: Second transmission unit

56: Switching unit

56A: First switching part

56B: Second switching part

56C: The third switching part

58: shaft components

60: First planetary gear unit

62,62A,62B: First sun gear

64: First ring gear

66,66A,66B,66C: First planetary gear

68:First carrier

68A: Part I

68B: Part 2

68C: Part 3

70: Second planetary gear unit

72: Second sun gear

74:Second ring gear

76,76A: Second planetary gear

78A: Part I

78B: Part 2

78C:Part 3

80: Communication Department

82: First one-way clutch

84: Output body

86: Second one-way clutch

88:Third one-way clutch

90:wheel hub

92:Flange

92A:hole

94:Input body

Claims (15)

A transmission device for a human-driven vehicle, which is provided with: a first transmission unit having a first transmission path for converting input rotation; a second transmission unit having a second transmission path for converting input rotation, and It is configured to transmit rotation to the first transmission unit; and a switching unit that changes the transmission ratio of the human-powered vehicle in stages; the first transmission unit has a first planetary gear unit, and the switching unit The rotation state of at least one of the first speed change unit and the second speed change unit is used to switch the transmission path inputting the rotation of the first speed change unit and the second speed change unit. The transmission path has at least: a first transmission path, which via the aforementioned first speed change path; a second transmission path that passes through the aforementioned second speed change path without passing through the aforementioned first speed change path; and a third transmission path that passes through the aforementioned first speed change path and the aforementioned second speed change path Both; when the switching unit increases the gear ratio in steps, the transmission path is switched in the order of the first transmission path, the second transmission path, and the third transmission path. The transmission device of claim 1, wherein the first transmission path has a first path and a second path, and the switching part is in at least one of the first transmission path and the third transmission path to switch from the transmission path including the first transmission path. One path is configured such that one of the first speed change path and the first speed change path including the second path is switched to the other, In the first transmission path and the third transmission path, respectively, the speed ratio when the first transmission path includes the second path is larger than the speed ratio when the first transmission path includes the first path. . The transmission device of claim 2, wherein the first planetary gear unit has: at least 2 first sun gears, at least 1 first ring gear, and at least 2 second gears respectively meshed with the at least 2 first sun gears. A planetary gear, and a first carrier that can move around the corresponding first sun gear and support the at least two first planetary gears, and the switching unit is configured to change the rotational state of the at least two first sun gears. , the aforementioned transmission path passes through one of the aforementioned at least two first sun gears, the aforementioned first path passes through the aforementioned one of the aforementioned at least two first sun gears, and the aforementioned second path passes through the aforementioned at least two first sun gears. Among the sun gears, the first sun gear passes through one different path than the first sun gear. As in claim 2, the first transmission path further includes a third path, and the switching unit is configured to switch from one of the first transmission path and the third transmission path to the other, and the first transmission path includes the third path. In the first transmission path and the third transmission path, the speed ratio when the first transmission path includes the third path is greater than the speed ratio when the first transmission path includes the second path. The transmission device of claim 3, wherein the first transmission path further has a third path, The switching unit switches from one of the first transmission path including the second transmission path and the first transmission path including the third transmission path in at least one of the first transmission path and the third transmission path. In the method of switching to the other side, in the first transmission path and the third transmission path respectively, when the first transmission path includes the third path, the transmission ratio is higher than when the first transmission path includes the third transmission path. In the case of the second path, the aforementioned gear ratio is larger, the aforementioned first planetary gear unit has at least three aforementioned first sun gears, and the aforementioned third path passes through at least three first sun gears and passes through the aforementioned first path and the aforementioned second path. The aforementioned first sun gear is different from the first sun gear. The transmission device according to any one of claims 1 to 5, wherein the transmission path further has a fourth transmission path that transmits the input rotation without changing the speed, and the switching unit transmits the transmission while increasing the speed ratio in steps. The paths are switched in the order of the fourth transmission path, the first transmission path, the second transmission path, and the third transmission path. The transmission device of claim 3 or 5, wherein the second transmission unit has a second planetary gear unit, and the second planetary gear unit has: at least one second sun gear, at least one second ring gear, and the at least one second ring gear. At least one second planetary gear meshed with one second sun gear, and a second carrier that supports the second planetary gear movably around the at least one second sun gear, and the switching unit is configured to change the The rotation state of at least one second sun gear, the aforementioned transmission path is configured through one of the aforementioned at least one second sun gear, the aforementioned first carrier and the aforementioned second ring gear are connected through a transmission part, The first carrier and the second carrier are connected through a first one-way clutch. In the first transmission path, the rotation of the second carrier causes the first carrier to rotate through the first one-way clutch, and the third carrier rotates through the first one-way clutch. In the transmission path, the rotation of the second ring gear causes the first carrier to rotate through the transmission part. The transmission device of claim 7, wherein the transmission path further has a fourth transmission path for transmitting the input rotation without changing the speed, and in the fourth transmission path, the rotation of the second carrier causes the first carrier to rotate via the first one-way clutch, and the rotation of the first carrier causes the second annular gear to rotate via the transmission portion. As in claim 7, when the switching unit increases the speed ratio in stages and switches the transmission path from the first transmission path to the second transmission path, the rotation state of the at least one second sun gear is changed and then the rotation state of the at least two first sun gears is changed. The transmission device of claim 9, wherein the transmission portion includes: one of a concave portion and a convex portion provided on one of the outer peripheral portion of the first carrier and the inner peripheral portion of the second ring gear; and one of the concave portion and the convex portion provided on the first carrier. The other of the recessed portion and the convex portion of the outer peripheral portion and the inner peripheral portion of the second ring gear; the length of the recessed portion in the circumferential direction is greater than the length of the convex portion in the circumferential direction. The transmission device of claim 7 further comprises: an output body, a second one-way clutch, and a third one-way clutch, wherein the first annular gear is connected to the output body via the second one-way clutch, and the second annular gear is connected to the output body via the third one-way clutch. A transmission device for a human-powered vehicle comprises: a first transmission unit having a first transmission path for changing the speed of an input rotation; a second transmission unit having a second transmission path for changing the speed of an input rotation and configured to transmit the rotation to the first transmission unit; and a switching unit for changing the speed ratio of the human-powered vehicle in stages; the first transmission unit having a first planetary gear unit, the first transmission path having a plurality of paths each having a different speed ratio, the switching unit switching the transmission path of the rotation input to the first transmission unit and the second transmission unit by changing the rotation state of at least one of the first transmission unit and the second transmission unit, When the transmission path passes through the first speed change path, the transmission path is switched from one of the first speed change path including one of the plurality of paths and the other of the first speed change path including the other of the plurality of paths. When the speed ratio is increased in stages, the speed change stage formed by the transmission path passing through the first speed change path including the path forming the first speed change ratio among the plurality of paths and the speed change stage formed by the transmission path passing through the first speed change path including the path forming the speed change ratio smaller than the first speed change ratio among the plurality of paths includes a speed change stage formed by the transmission path not passing through the first speed change path. The transmission device of claim 1 or 12 further includes a wheel housing (Hub) that houses the first transmission unit, the second transmission unit, and the switching part. An auxiliary system for a human-driven vehicle, and is provided with: a transmission device according to any one of claims 1 to 13; and a motor, which is an auxiliary human driving force. The auxiliary system of claim 14 further comprises an operating unit, which is manually operated to operate the aforementioned transmission device, and the aforementioned transmission device changes the transmission ratio of the aforementioned human-powered vehicle according to the operation of the aforementioned operating unit.