TW202210355A - Motor unit for bicycle derailleur - Google Patents

Abstract

A motor unit 14 for a bicycle derailleur 10 includes an output shaft 24, a motor 26, a drive gear 28, an output gear 30, an intermediate gear structure 32, and an angle sensor 34. The motor 26 includes a motor shaft 36. The drive gear 28 is on the motor shaft 36 of the motor 26, and the output gear 30 is on the output shaft 24. The intermediate gear structure 32 is positioned in a load path between the drive gear 28 and the output gear 30, and the intermediate gear structure 32 includes at least one reduction gear 38 and one encoder 40. A rotational ratio between the encoder 40 and the output gear 30 is such that the encoder 40 rotates less than 360 degrees.

Description

Motor unit for bicycle derailleur

The present invention generally relates to a motor unit for a bicycle transmission.

Many bicycles have a chain drive transmission system that includes a plurality of front sprockets and a plurality of rear sprockets. The rider can increase or decrease the gear ratio of the transmission system through a shift operation that moves a chain from one sprocket to another through a derailleur. In an electronic transmission system, the movement of the transmission is controlled by a motor unit. To shift the chain from one sprocket to another, the motor unit determines, based on the position of the derailleur, which sprocket is currently engaged with the chain and the amount of movement required to achieve the desired gear. In some situations, such as power outages, backlash, or gear skips, the motor unit may lose information needed to determine the position of the transmission. There are challenges in designing a motor for an electronic bicycle derailleur that can determine the position of the derailleur during power outages, backlash, or gear skips.

Disclosed herein is a motor unit for a bicycle transmission developed to address the above-mentioned problems. According to a first aspect of the present invention, the motor unit for a bicycle transmission includes an output shaft, a motor, a drive gear, an output gear, an intermediate gear structure and an angle sensor. The motor includes a motor shaft. The drive gear is located on the motor shaft of the motor. The output gear is located on the output shaft. The intermediate gear structure is positioned in a load path between the drive gear and the output gear, and the intermediate gear structure includes at least one reduction gear and an encoder. A rotation ratio between the encoder and the output gear causes the encoder to rotate less than 360 degrees.

With regard to the motor unit for a bicycle derailleur according to the first aspect, a small motor unit may be provided in which the output gear rotates through its entire range and the encoder rotates less than 360 degrees, thereby allowing for power interruptions Then the rotation of the encoder is determined.

According to a second aspect of the present invention, the motor unit for a bicycle derailleur according to the first aspect is configured such that a rotatable range of the output gear is limited by a rotation limiting structure of the bicycle derailleur. With the motor unit for a bicycle derailleur according to the second aspect, the rotational range of the output gear can be limited to prevent the encoder from rotating more than 360 degrees.

According to a third aspect of the present invention, the motor unit for a bicycle derailleur according to the second aspect is configured such that a body of the bicycle derailleur and the motor unit are connected to a link of the bicycle derailleur, and the bicycle derailleur One of the limits of the rotatable range is mechanical. With the motor unit for a bicycle derailleur according to the third aspect, a link of the bicycle derailleur can be rotated and the rotatable range can be limited when power is interrupted.

According to a fourth aspect of the present invention, the motor unit for a bicycle derailleur according to the second aspect is configured such that the output gear contacts a housing of the motor unit and one of the rotatable ranges of the output gear Limited to electrical. With the motor unit for a bicycle derailleur according to the fourth aspect, the limit of the rotatable range of the output gear can be adjusted electrically.

According to a fifth aspect of the present invention, the motor unit for a bicycle derailleur according to any one of the first to fourth aspects is configured such that the output gear train is non-circular. With the motor unit for a bicycle transmission according to the fifth aspect, the efficiency and battery life of the motor unit can be improved by using the output gear to transmit a variable rotation ratio.

According to a sixth aspect of the present invention, the motor unit for a bicycle transmission according to any one of the first to fifth aspects is configured such that the output gear train is a sector gear. With the motor unit for a bicycle transmission according to the sixth aspect, the size and weight of the output gear can be reduced.

According to a seventh aspect of the present invention, the motor unit for a bicycle derailleur according to any one of the first to sixth aspects is configured such that a rotational force of the output shaft is transmitted to the bicycle derailleur a connecting rod. With the motor unit for a bicycle derailleur according to the seventh aspect, the link of the bicycle derailleur can be moved to move the chain to a desired sprocket.

According to an eighth aspect of the present invention, the motor unit for a bicycle derailleur according to any one of the first to seventh aspects is configured such that the bicycle derailleur includes a base member, a linkage mechanism and a chain guide to a front bicycle derailleur. With the motor unit for a bicycle derailleur according to the eighth aspect, the position of the front bicycle derailleur relative to the plurality of front sprockets can be determined after power interruption.

According to a ninth aspect of the present invention, the motor unit for a bicycle derailleur according to any one of the first to seventh aspects is configured such that the bicycle derailleur includes a base member, a movable member , a link mechanism and a chain guide and a rear bicycle derailleur. With the motor unit for a bicycle derailleur according to the ninth aspect, the condition of the rear bicycle derailleur relative to the plurality of rear sprockets can be determined after a power interruption.

According to a tenth aspect of the present invention, the motor unit for a bicycle derailleur according to any one of the first to ninth aspects is configured such that the motor unit is disposed within a base member of the bicycle derailleur. With the motor unit for a bicycle derailleur according to the tenth aspect, the motor unit can be protected from damage while providing an aerodynamic and aesthetic bicycle derailleur.

According to an eleventh aspect of the present invention, the motor unit for a bicycle derailleur according to any one of the first to tenth aspects is configured such that the bicycle derailleur includes a a power supply port, and the power supply port is electrically connected to the motor. With the motor unit for a bicycle derailleur according to the eleventh aspect, a battery provided on the bicycle may be used to power the motor unit.

According to a twelfth aspect of the present invention, the motor unit for a bicycle transmission according to any one of the first to eleventh aspects further includes a housing and a wireless communication unit. The motor, at least part of the output shaft and the intermediate gear structure are disposed in the housing of the motor unit. The wireless communication unit is configured to communicate with an additional wireless communication unit disposed on an additional bicycle component. With the motor unit for a bicycle derailleur according to the twelfth aspect, the motor unit is protected from damage and wireless communication between the motor unit and an additional bicycle component is facilitated.

According to a thirteenth aspect of the present invention, the motor unit for a bicycle derailleur according to any one of the first to twelfth aspects further includes a motor unit configured to detect according to one of the angle sensors value to calculate an angle of the output gear and one of the output shaft by a controller. With the motor unit for a bicycle transmission according to the thirteenth aspect, the angle of the output gear or the output shaft can be determined from the value of the angle sensor.

According to a fourteenth aspect of the present invention, the motor unit for a bicycle derailleur according to any one of the first to thirteenth aspects is configured such that the angle sensor is a magnetic sensor. With the motor unit for a bicycle derailleur according to the fourteenth aspect, a value of the angle sensor can be determined under extreme environmental conditions such as high temperature.

According to a fifteenth aspect of the present invention, the motor unit for a bicycle derailleur according to any one of the first to thirteenth aspects is configured such that the angle sensor is an optical sensor. With the motor unit for a bicycle derailleur according to the fifteenth aspect, a value of the angle sensor can be determined quickly and accurately and with an ambient magnetic disturbance.

According to a sixteenth aspect of the present invention, the motor unit for a bicycle derailleur according to any one of the first to fifteenth aspects is configured such that the encoder is responsive to the motor shaft of the motor. Rotate and rotate. With the motor unit for a bicycle transmission according to the sixteenth aspect, the position of the output gear can be controlled according to the rotation of the motor shaft.

According to a seventeenth aspect of the present invention, the motor unit for a bicycle derailleur according to any one of the first to sixteenth aspects is configured such that the encoder is rotatably disposed on the intermediate gear structure On a first shaft, the output gear is rotatably mounted on a second shaft, and the second shaft is adjacent to the first shaft without another shaft in between. With the motor unit for a bicycle derailleur according to the seventeenth aspect, the size of the motor unit can be minimized while maintaining the ability to accurately determine the position of the output shaft and/or the output gear.

This [Summary] is provided to introduce a selection of concepts in a simplified form that are further described below in [Embodiments]. This [Summary] is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter. Furthermore, the claimed subject matter is not limited to implementations that solve any or all disadvantages noted in any part of this disclosure. As used herein, the term "small and/or light vehicle" refers to electric and non-electric vehicles (regardless of the number of wheels), but does not include four-wheeled vehicles that have an internal combustion engine as one source of power to drive the wheels or that require a license plate to operate in A four-wheeled electric vehicle on the road.

Selected embodiments will now be explained with reference to the drawings, wherein like reference numerals throughout the various views designate corresponding or identical elements. Those skilled in the art will appreciate from the present invention that the following description of the embodiments is for illustration only and is not intended to limit the invention as defined by the scope of the appended claims and their equivalents.

Referring initially to FIG. 1 , there is shown an exemplary bicycle 1 having a bicycle derailleur 10 including a motor unit 14 in accordance with at least one disclosed embodiment of the present invention. The bicycle series 1 is, for example, an off-road bike such as a cyclocross bike or a mountain bike. Alternatively, the bicycle 1 may be a road bicycle. As shown in the schematic outline of FIG. 2 , the bicycle 1 may have an axial center plane P1 defining the left and right halves of the bicycle 1 . The following directional terms "front", "back", "forward", "backward", "left", "right", "lateral", "up" and "down" and any other similar directional terms refer to The direction determined based on, for example, a rider sitting upright on a saddle of the bicycle 1 facing a handlebar.

Continuing with FIG. 1 , the bicycle 1 includes a frame 2 attached to a rear wheel 3 . A front fork 4 attaches a front wheel 5 to the frame 2 . The pedals 6 on both sides of the bicycle 1 are attached to corresponding crank arms 7 . The crank arms 7 are mounted on both sides of the frame 2 at 180 degrees to each other and are connected by a crank shaft 8 (indicated by a dashed line). The bicycle 1 of this embodiment is driven by a chain drive transmission system including a bicycle chain 9 , a bicycle derailleur 10 and a bicycle sprocket 12 . It should be appreciated that the bicycle derailleur 10 described herein may be configured as either or both a rear bicycle derailleur 10A and/or a front bicycle derailleur 10B. Similarly, a bicycle sprocket 12 described herein may refer to one of the plurality of rear sprockets 12A and/or one of the plurality of front sprockets 12B.

In an engaged state, the bicycle chain 9 is engaged with one of the plurality of front sprockets 12B and one of the plurality of rear sprockets 12A, as described below with reference to FIGS. 4 and 5A . A driving force applied to the pedal 6 rotates the crankshaft 8 and the front sprocket 12B. As the front sprocket 12B rotates, the bicycle chain 9 is driven around the rear sprocket 12A, which transmits power to the rear wheel 3 to propel the bicycle 1 . Therefore, the front bicycle derailleur 10B shifts the bicycle chain 9 between the front sprockets 12B, and the rear bicycle derailleur 10A shifts the bicycle chain 9 between the rear sprockets 12A. As will be described in detail below, the shifting of the bicycle chain by the rear bicycle derailleur 10A and/or the front bicycle derailleur 10B may be performed by an electronic motor unit included in either or both of the rear bicycle derailleur 10A and/or the front bicycle derailleur 10B 14 Promotion. Shifting of the bicycle chain 9 changes the gear ratio of the chain drive transmission to increase or decrease the distance traveled by each rotation of the pedals 6 . Other parts of bicycle 1 are well known and will not be described herein.

3A shows a side view of a rear bicycle derailleur 10A in accordance with the present invention. The rear bicycle derailleur 10A includes a base member 16A, a movable member 18A, a link mechanism 20A, and a chain guide 22A. In the configuration described in detail below, the motor unit 14 is positioned within the base member 16 of the bicycle derailleur 10, but the motor unit 14 may alternatively be configured to be positioned within other components of the derailleur. The motor unit 14 may be positioned at one of the movable member 18A and the linkage mechanism 20A. FIG. 3B shows a schematic representation of a front bicycle derailleur 10B. The bicycle derailleur 10 may be a front bicycle derailleur 10B including a base member 10B, a linkage 20B, and a chain guide 22B.

Referring to FIGS. 4 and 8 , the bicycle derailleur 10 includes a wireless communication unit 62 configured to communicate with an additional wireless communication unit 64 disposed on an additional bicycle component 66 . The motor unit 14 includes a wireless communication unit 62 , but the wireless communication unit 62 may alternatively be positioned within other components of the bicycle transmission 10 . In the embodiments described herein, it should be appreciated that the wireless communication unit 62 may be included in any of the bicycle rear derailleur 10A and the bicycle front derailleur 10B.

FIG. 4 is an exploded view of the motor unit 14 for the bicycle derailleur 10 in accordance with the present invention. The motor unit 14 includes an output shaft 24 , a motor 26 , a drive gear 28 , an output gear 30 , an intermediate gear structure 32 and an angle sensor 34 . The motor 26 includes a motor shaft 36 on which the drive gear 28 is seated. The output gear 30 is arranged on the output shaft 24 . The intermediate gear structure 32 is positioned in a load path between the drive gear 28 and the output gear 30 . The intermediate gear structure 32 includes at least one reduction gear 38 and an encoder 40 . In the embodiment described herein, the intermediate gear structure 32 includes two reduction gears 38A, 38B and an encoder 40 . It should be appreciated, however, that the intermediate gear structure 32 may be configured to include one reduction gear, three reduction gears, or any other suitable number of reduction gears. In the illustrated embodiment, the angle sensor 34 is configured as a magnetic sensor. It should be appreciated that the angle sensor may alternatively be configured as an optical sensor or any other suitable type of sensor.

The gears in the intermediate gear arrangement 32 are rotatably mounted on a respective shaft. The encoder 40 is rotatably mounted on a first shaft 42 of the intermediate gear structure 32 , and the output gear is rotatably mounted on a second shaft 44 . As shown in the motor unit 14 depicted in FIGS. 4-6, the second shaft 44 is configured adjacent to the first shaft 42 without another shaft in between. It should be appreciated, however, that the first shaft 42 and the second shaft 44 may alternatively be configured to be separated by one or more gears and shafts of an intermediate gear arrangement. The shafting is supported by an upper gear shaft support member 46 and a lower gear shaft support member 48 . As shown in the exploded view of FIG. 4 , with reference to FIG. 8 , the motor unit 14 further includes a housing 50 in which the motor 26 , at least a portion of the output shaft 24 and the intermediate gear structure 32 are positioned. The housing 50 includes a base plate. In an assembled state, the wireless communication unit 62 is disposed in the base plate. The intermediate gear structure 32 is positioned relative to the base plate at a first side of the housing 50, and the wireless communication unit 62 is positioned relative to the base plate at a second side of the housing 50 opposite the first side.

In the configuration of the motor unit 14 described herein, a rotatable range of the output gear 30 is limited by a rotation limiting structure 52 of the bicycle derailleur 10 . The angle sensor 34 is configured to detect the rotation of the encoder 40, and a rotation ratio between the encoder 40 and the output gear 30 causes the encoder 40 to rotate less than 360 degrees. A general formula for this configuration is shown in Equation 1 below, where G is the gear, n is the number of gears, R is the rotation ratio between the nth gear and the n'th gear, and θ _n is the rotation angle of the nth gear. Equation 1: θ _n × R(G _n :G _n' ) = θ _n' ＜ 360°

Exemplary equations for different positions of the encoder 40 relative to the output gear 30 will be shown below. In the example formulas shown herein, output gear 30 is denoted G ₀ and θ ₀ is the rotatable angle of output gear 30 . In a preferred embodiment, the rotation ratio between the output gear 30 and the encoder 40 is in a range between 4.5 and 7. When the encoder 40 is or is positioned on a gear (G ₁ ) adjacent to the output gear 30 , the equations are shown in Equation 2 below. Equation 2: θ ₀ × R(G ₀ :G ₁ ) = θ ₁ < 360°

When the encoder 40 is mounted or placed on one of the gears (G ₂ ) spaced from the output gear 30 by two gears, the equations are shown below in Equation 3. Equation 3: θ ₀ × [R(G ₀ :G ₁ ) × R(G ₁ :G ₂ )] = θ ₂ ＜ 360°

When the encoder 40 is mounted or placed on one of the three gears (G ₃ ) spaced from the output gear 30, the equations are shown below in Equation 4. Equation 4: θ ₀ × [R(G ₀ :G ₁ ) × R(G ₁ :G ₂ ) × R(G ₂ :G ₃ )] = θ ₃ ＜ 360°

When a portion of a body of bicycle derailleur 10 (such as base member 16 or movable member 18 ) and the motor unit are connected to a link of bicycle derailleur 10 , one of the limits of the rotatable range may be mechanical. Alternatively, when the output gear 30 contacts the housing 50 of the motor unit 14, the limit of the rotatable range of the output gear 30 may be electrical.

As will be described below with reference to FIG. 8 , the motor unit 14 further includes a controller 60 configured to calculate an angle of one of the output gear 30 and the output shaft 24 based on a detection value of the angle sensor 34 . Because the encoder is limited to less than 360 degrees of rotation, even if data about the position of the bicycle derailleur 10 is lost (such as power outages, backlash, or gear skips), the controller 60 can The rotational ratio determines the condition of the bicycle derailleur 10 (eg, the relative position of the base member and the movable member) and thus the gear ratio of the transmission system.

5 and 6 show a side view and a top view of a gear structure of the motor unit 14, respectively. The motor 26 including the motor shaft 36 drives the drive gear 28 . The drive gear 28 drives at least one reduction gear 38 , which in turn drives the encoder 40 . Thus, the encoder 40 is configured to rotate in response to rotation of one of the motor shafts 36 of the motor 26 . The encoder 40 drives the output gear 30 , which in turn drives the output shaft, and a rotational force of the output shaft is transmitted to a link of the bicycle derailleur 10 to move the derailleur 10 . The encoder 40 may have a reduction gear function so that the encoder 40 reduces the rotational speed transmitted from the reduction gear 38 .

Turning to FIG. 7A , there is shown a schematic representation of one of the gear structures in the motor unit 14 for the bicycle derailleur 10 according to the present invention. As described above, the motor 26 including the motor shaft 36 drives the drive gear 28 . In the gear structure shown in FIG. 7A, the driving gear 28 is a worm gear. Additionally or alternatively, the drive gear may be a circular gear, a non-circular gear, a sector gear, or any other suitable gear type. The angle sensor 34 is configured to detect the rotation of the encoder 40, which drives the output gear 30 and the output shaft. In the illustrated embodiment of Figure 7A, the output gear 30 is circular, however, it should be understood that the output gear could alternatively be configured as one of the non-circular output gears 130 shown in Figure 7B, the one shown in Figure 7C A sector gear 230 or any other suitable gear type.

Turning to FIG. 8, a schematic diagram of a motor unit 14 for a bicycle transmission 10 in accordance with the present invention is shown. To power the motor 26 , the bicycle derailleur 10 includes a power supply port 56 configured to connect with a battery 58 , and the power supply port 56 is electrically connected to the motor 26 . As described above and shown schematically in FIG. 8 , the motor unit 14 also includes a controller 60 that calculates the angle of the output gear 30 or the output shaft 24 from the detection value of the angle sensor 34 , which is disposed on the encoder 40 . . As described above with reference to FIG. 3B , wireless communication unit 62 is configured to communicate with additional wireless communication unit 64 disposed on an additional bicycle component 66 . The additional bicycle component 66 may be, for example, an additional controller and may be in communication with one or more switches 68 . Although FIG. 8 depicts the additional bicycle assembly 66 as being powered by the same battery 58 that powers the motor unit 14, it should be understood that in another configuration, the additional bicycle assembly 66 may be powered by a separate battery. One or more switches 68 are configured to receive a shift command from the rider to initiate a shift operation. Accordingly, one or more switches 68 may be configured as shifters mounted on the handlebars of bicycle 1 . Although it is described above that the additional bicycle component 66 may be an additional controller, it should be understood that the additional wireless communication unit 64 may be disposed on any suitable additional bicycle component.

Although only selected embodiments have been chosen to illustrate the invention, it will be apparent to those skilled in the art from the invention that various changes and modifications can be made herein without departing from the scope of the invention as defined in the appended claims . For example, the size, shape, location or orientation of the various components can be changed as needed and/or desired. Components shown directly connected or in contact with each other may have intermediate structures disposed therebetween. The functions of one element can be performed by two elements, and vice versa. The structures and functions of one embodiment can be used in another embodiment. Not all advantages are necessarily present at the same time in a particular embodiment. Each feature (alone or in combination with other features) that differs from the prior art should also be considered a separate description of a further invention of the applicant, which includes the structural and/or functional concepts embodied by such feature(s). Accordingly, the foregoing descriptions of embodiments according to the present invention are provided for illustration only and are not intended to limit the invention as defined by the scope of the appended claims and their equivalents.

1: Bicycle 2: Frame 3: rear wheel 4: Front fork 5: Front wheel 6: Pedal 7: Crank arm 8: Crankshaft 9: Bicycle Chain 10: Bicycle Transmission 10A: Rear Bicycle Derailleur 10B: Front Bicycle Derailleur 12: Bicycle sprocket 12A: Rear sprocket 12B: Front sprocket 14: Electronic motor unit 16: Base member 16A: Base member 16B: Base member 18: Movable components 18A: Movable Components 20A: Linkage mechanism 20B: Linkage mechanism 22A: Chain guide 22B: Chain guide 24: Output shaft 26: Motor 28: Drive gear 30: Output gear 32: Intermediate gear structure 34: Angle sensor 36: Motor shaft 38: Reduction gear 38A: The first reduction gear 38B: Second reduction gear 40: Encoder 42: The first axis 44: Second axis 46: Upper gear shaft support member 48: Lower gear shaft support member 50: Shell 52: Rotation limit structure 56: Power Supply Port 58: Battery 60: Controller 62: Wireless communication unit 64: Additional wireless communication unit 66: Additional Bike Components 68: switch 130: Non-circular output gear 230: Sector gear P1: Axial center plane

A more complete understanding and better understanding of the present invention and its many attendant advantages will be readily obtained by reference to the following detailed description considered in conjunction with the accompanying drawings, wherein:

1 is a right side view of an exemplary bicycle incorporating a motor unit for a bicycle derailleur in accordance with the present invention;

Figure 2 is a schematic outline of one of the bicycles;

3A is a side view of a rear bicycle derailleur with a guide in accordance with the present invention engaging a chain with a rear sprocket of a bicycle;

3B is a schematic representation of a front bicycle derailleur according to the present invention;

4 is an exploded view of a motor unit for a bicycle transmission according to the present invention;

5 is a side view of a gear structure in a motor unit for a bicycle transmission according to the present invention;

6 is a top view of a gear structure in a motor unit for a bicycle derailleur according to the present invention;

7A-7C are schematic representations of a gear structure in a motor unit for a bicycle transmission according to the present invention; and

8 is a schematic diagram of a motor unit for a bicycle transmission according to the present invention.

14: Electronic motor unit

24: Output shaft

26: Motor

28: Drive gear

30: Output gear

32: Intermediate gear structure

34: Angle sensor

38A: The first reduction gear

38B: Second reduction gear

40: Encoder

42: The first axis

44: Second axis

46: Upper gear shaft support member

48: Lower gear shaft support member

50: Shell

52: Rotation limit structure

62: Wireless communication unit

Claims (17)

A motor unit (14) for a bicycle transmission (10) comprising: an output shaft (24); a motor (26) comprising a motor shaft (36); a drive gear (28) located on the motor shaft (36) of the motor (26); an output gear (30) located on the output shaft (24); An intermediate gear structure (32) positioned in a load path between the drive gear (28) and the output gear (30), the intermediate gear structure (32) comprising at least one reduction gear (38) and a code device (40); and an angle sensor (34) configured to detect rotation of the encoder (40), wherein A rotation ratio between the encoder (40) and the output gear (30) causes the encoder (40) to rotate less than 360 degrees. The motor unit (14) for a bicycle derailleur (10) as claimed in claim 1, wherein a rotatable range of the output gear (30) is limited by a rotation limiting structure (52) of the bicycle derailleur (10). The motor unit (14) for a bicycle derailleur (10) as claimed in claim 2, wherein a body of the bicycle derailleur (10) and the motor unit (14) are connected to a link of the bicycle derailleur (10) therein In one configuration, one of the limits of the rotatable range is mechanical. The motor unit (14) for a bicycle transmission (10) of claim 2, wherein in a configuration in which the output gear (30) contacts a housing (50) of the motor unit (14), the output gear One of the limits of the rotatable range of (30) is electrical. The motor unit (14) for a bicycle transmission (10) as claimed in any one of claims 1 to 4, wherein the output gear (30) is non-circular. The motor unit (14) for a bicycle transmission (10) as claimed in any one of claims 1 to 4, wherein the output gear (30) is a sector gear. The motor unit (14) for a bicycle derailleur (10) as claimed in any one of claims 1 to 4, wherein a rotational force of the output shaft (24) is transmitted to a link of the bicycle derailleur (10). The motor unit (14) for a bicycle derailleur (10) according to any one of claims 1 to 4, wherein the bicycle derailleur (10) comprises a base member (16B), a linkage (20B) and a One of the chain guides (22B) is a front bicycle derailleur (10B). The motor unit (14) for a bicycle derailleur (10) according to any one of claims 1 to 4, wherein the bicycle derailleur (10) comprises a base member (16A), a movable member (18A), a A link mechanism (20A) and a chain guide (22A) and a rear bicycle derailleur (10A). The motor unit (14) for a bicycle derailleur (10) as claimed in any one of claims 1 to 4, wherein the motor unit (14) is housed in a base member (16A, 16B) of the bicycle derailleur (10) . The motor unit (14) for a bicycle derailleur (10) of any one of claims 1 to 4, wherein the bicycle derailleur (10) includes a power supply port ( 56), and the power supply port (56) is electrically connected to the motor (26). The motor unit (14) for a bicycle transmission (10) according to any one of claims 1 to 4, further comprising: a housing (50) in which the motor (26), at least a portion of the output shaft (24) and the intermediate gear structure (32) are housed; and A wireless communication unit (62) configured to communicate with an additional wireless communication unit (64) disposed on an additional bicycle component (66). The motor unit (14) for a bicycle transmission (10) according to any one of claims 1 to 4, further comprising: A controller (60) configured to calculate an angle of the output gear (30) and one of the output shaft (24) based on a detection value of the angle sensor (34). The motor unit (14) for a bicycle derailleur (10) as claimed in any one of claims 1 to 4, wherein the angle sensor (34) is a magnetic sensor. The motor unit (14) for a bicycle derailleur (10) as claimed in any one of claims 1 to 4, wherein the angle sensor (34) is an optical sensor. The motor unit (14) for a bicycle derailleur (10) of any one of claims 1 to 4, wherein the encoder (40) is configured to respond to the motor shaft (36) of the motor (26) One spins and spins. The motor unit (14) for a bicycle derailleur (10) as claimed in any one of claims 1 to 4, wherein The encoder (40) is rotatably mounted on a first shaft (42) of the intermediate gear structure (32); the output gear (30) is rotatably mounted on a second shaft (44); and The second axis (44) is adjacent to the first axis (42) without another axis in between.

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