CN-116513361-B - Transmission unit for man-power driven vehicle

Abstract

The invention provides a transmission unit for a manually driven vehicle, which can improve the design freedom. The transmission unit for a manually driven vehicle includes a housing, an input portion, a first transmission portion including a first input rotor, a first output rotor, and a first endless annular member, a second transmission portion including a second input rotor, a second output rotor, and a second endless annular member, the first endless annular member including a plurality of first engaging portions that engage with the first input rotor and the first output rotor, respectively, and having a first pitch width in an extending direction of the first endless annular member, and the second endless annular member including a plurality of second engaging portions that engage with the second input rotor and the second output rotor, respectively, and having a second pitch width in an extending direction of the second endless annular member, the first pitch width being different from the second pitch width.

Inventors

• Yi Tengsheng
• Ya Shou Gui You
• YAMAGUCHI SOTA

Assignees

• 株式会社岛野

Dates

Publication Date

20260508

Application Date

20221227

Priority Date

20220131

Claims (18)

1. 1. A transmission unit for a manually driven vehicle is provided with: A housing; an input unit configured to be provided to the housing and having a motor output shaft to which a driving force is input; a first transmission unit provided in the housing, the driving force being input to the first transmission unit via the input unit; A second transmission unit provided in the housing, the driving force being input to the second transmission unit via the first transmission unit; An intermediate shaft; An output unit configured to be rotatably provided to the housing, the driving force being input to the output unit via the second transmission unit; The first transmission portion includes a first input rotating body disposed coaxially with the motor output shaft, a first output rotating body having a diameter different from that of the first input rotating body and provided to the intermediate shaft, and a first endless annular member wound around the first input rotating body and the first output rotating body, The second transmission portion includes a second input rotating body provided to the intermediate shaft, a second output rotating body having a diameter different from that of the second input rotating body and coaxially arranged with the output portion, and a second endless annular member wound around the second input rotating body and the second output rotating body, the second input rotating body being provided to the second input rotating body via the first output rotating body, the second output rotating body having a diameter different from that of the second input rotating body and coaxially arranged with the output portion, the first endless annular member including a plurality of first engaging portions that are engaged with the first input rotating body and the first output rotating body, respectively, and having a first pitch width in an extending direction of the first endless annular member, The second endless annular member includes a plurality of second engaging portions that engage with the second input rotating body and the second output rotating body, respectively, and have a second pitch width in an extending direction of the second endless annular member, the first pitch width being different from the second pitch width, The motor rotation center axis of the motor output shaft, the intermediate shaft center axis of the intermediate shaft, and the output rotation center axis of the output section are arranged to extend substantially parallel to a first direction and are located at vertexes of a triangle when viewed from the first direction.
2. 2. The transmission unit of claim 1, wherein, And a motor configured to apply a propulsive force to the manually driven vehicle, The driving force is input from the motor to the input portion, The first speed changing part and the second speed changing part respectively form a speed reducer, The second pitch width is greater than the first pitch width.
3. 3. The transmission unit according to claim 1 or 2, wherein, The first output rotating body is configured to rotate integrally with the second input rotating body.
4. 4. The transmission unit according to claim 1 or 2, wherein, The first output rotating body is integrally formed with the second input rotating body.
5. 5. The transmission unit according to claim 1 or 2, wherein, And a third transmission unit provided in the housing, the driving force being input to the third transmission unit via the second transmission unit, The driving force is input to the output portion via the third transmission portion, The third speed changing portion includes a third input rotating body, a third output rotating body having a diameter different from that of the third input rotating body, and a third endless annular member wound around the third input rotating body and the third output rotating body, The third endless annular member includes a plurality of third engaging portions that engage with the third input rotating body and the third output rotating body, respectively, and have a third pitch width in an extending direction of the third endless annular member, The third pitch width is different from at least one of the first pitch width and the second pitch width.
6. 6. The transmission unit of claim 5, wherein, The third transmission portion constitutes a speed reducer.
7. 7. The transmission unit of claim 5, wherein, The third pitch width is greater than at least one of the first pitch width and the second pitch width.
8. 8. The transmission unit of claim 5, wherein, Further comprising a fourth transmission unit provided in the housing, the driving force being input to the fourth transmission unit via the third transmission unit, The driving force is input to the output portion via the fourth transmission portion, The fourth speed changing part comprises a fourth input rotating body, a fourth output rotating body with a diameter different from that of the fourth input rotating body and a fourth endless annular member wound on the fourth input rotating body and the fourth output rotating body, The fourth endless annular member includes a plurality of fourth engaging portions that engage with the fourth input rotating body and the fourth output rotating body, respectively, and have a fourth pitch width in an extending direction of the fourth endless annular member, The fourth pitch width is different from at least one of the first pitch width, the second pitch width, and the third pitch width.
9. 9. The transmission unit of claim 8, wherein, The fourth transmission portion constitutes a speed reducer.
10. 10. The transmission unit of claim 8, wherein, The fourth pitch width is greater than at least one of the first pitch width, the second pitch width, and the third pitch width.
11. 11. The transmission unit according to claim 1 or 2, wherein, The first pitch width is 4mm or more and 10mm or less.
12. 12. The transmission unit according to claim 1 or 2, wherein, The planetary gear type speed reducer is disposed on the transmission path of the driving force between the input unit and the output unit.
13. 13. The transmission unit according to claim 1 or 2, wherein, The first input rotator includes a first sprocket, The first output rotating body includes a second sprocket, The first endless annular member comprises a chain.
14. 14. The transmission unit according to claim 1 or 2, wherein, The first input rotator includes a first pulley, The first output rotating body includes a second pulley, The first endless annular member comprises a belt.
15. 15. The transmission unit according to claim 1 or 2, wherein, Also provided with a first one-way clutch, The first one-way clutch is disposed on the transmission path of the driving force between the input portion and the output portion.
16. 16. The transmission unit according to claim 1 or 2, wherein, Also comprises an input rotation shaft which is arranged on the shell and is used for inputting the manpower driving force, The input rotation center axis of the input rotation shaft is coaxially arranged with the output rotation center axis of the output part.
17. 17. The transmission unit of claim 16, wherein, At least a part of the input rotation shaft is accommodated in the housing, The length of the at least a portion of the input rotary shaft housed in the housing in the axial direction of the input rotary shaft is 50mm or more and 70mm or less.
18. 18. The transmission unit of claim 16, wherein, A second one-way clutch is also provided, The second one-way clutch is disposed between the input rotary shaft and the output unit on the transmission path of the manual driving force.

Description

Transmission unit for man-power driven vehicle Technical Field The invention relates to a transmission unit for a human-powered vehicle. Background For example, patent document 1 discloses a transmission unit for a manually driven vehicle including a speed change portion connected to a motor. The transmission unit of the manual drive vehicle in patent document 1 includes a speed reducer composed of a plurality of sprockets and a plurality of chains. Prior art literature Patent literature Patent document 1, international publication No. 2011/01309. Disclosure of Invention Problems to be solved by the invention The invention provides a transmission unit for a manually driven vehicle, which can improve the degree of freedom of design. Technical scheme for solving problems The transmission unit according to the first aspect of the present disclosure is a transmission unit for a manually driven vehicle, and includes a housing, an input portion configured to be provided to the housing for inputting a driving force, a first transmission portion provided to the housing, the driving force being input to the first transmission portion via the input portion, a second transmission portion provided to the housing, the driving force being input to the second transmission portion via the first transmission portion, and an output portion configured to be rotatably provided to the housing, the driving force being input to the output portion via the second transmission portion, the first transmission portion including a first input rotor, a first output rotor having a diameter different from that of the first input rotor, and a first endless member wound around the first input rotor and the first output rotor, the second transmission portion including a second input rotor, a second output rotor having a diameter different from that of the second input rotor, and a second endless member wound around the second transmission portion, the first endless member having a plurality of widths different from that of the first endless rotor and the second endless member, the first endless member having a plurality of endless members wound around the second endless member, the first endless member having a plurality of widths different from that of the first endless member and the second endless member. According to the transmission unit of the first aspect, for example, since the endless annular member having an appropriate pitch width can be used in accordance with the shape of the transmission unit, the size of the transmission unit, or the transmitted driving force, etc., the degree of freedom in design is improved. According to the transmission unit of the first aspect, since the driving force appropriate for the pitch width of the endless annular member is input to the first transmission portion and the second transmission portion, more appropriate gear shifting can be performed. In the transmission unit according to the second aspect of the present disclosure, the transmission unit further includes a motor configured to apply a propulsive force to the manually driven vehicle, the driving force is input from the motor to the input unit, the first transmission unit and the second transmission unit respectively constitute a speed reducer, and the second pitch width is larger than the first pitch width. According to the transmission unit of the second aspect, since the rotational torque transmitted to the second transmission portion is larger than the rotational torque transmitted to the first transmission portion and the second pitch width is larger than the first pitch width, it is easy to make the strength of the second transmission portion higher than that of the first transmission portion, so that an appropriate speed change can be performed. In the transmission unit according to the third aspect of the first or second aspect of the present disclosure, the first output rotating body is configured to rotate integrally with the second input rotating body. According to the transmission unit of the third aspect, the driving force of the input portion is appropriately transmitted from the first transmission portion to the second transmission portion. In the transmission unit according to a fourth aspect of any one of the first to third aspects of the present disclosure, the first output rotating body is integrally formed with the second input rotating body. According to the transmission unit of the fourth aspect, the number of parts can be reduced. In the transmission unit according to a fifth aspect of the present disclosure, the transmission unit further includes a third transmission portion provided to the housing, the driving force is input to the third transmission portion via the second transmission portion, the driving force is input to the output portion via the third transmission portion, the third transmission portion includes a third input rotating body, a third output rotating body having a diameter different from that of