CN117719623A

CN117719623A - Motor unit and derailleur for bicycle component

Info

Publication number: CN117719623A
Application number: CN202311126685.XA
Authority: CN
Inventors: 陶山翔大; 水谷祐太; 江村笃裕
Original assignee: Shimano Inc
Current assignee: Shimano Inc
Priority date: 2022-09-16
Filing date: 2023-09-01
Publication date: 2024-03-19

Abstract

The present invention provides a motor unit and a derailleur for a bicycle component. A motor unit includes a torque limiter and a transmission structure. The torque limiter includes a first member and a second member. The first member and the second member are movable relative to each other in a state where torque applied to the torque limiter is equal to or greater than a torque threshold. The first member and the second member are movable with each other in a state where the torque is less than the torque threshold. The transmission structure comprises: a first race; a second race; a first intermediate member at least partially disposed between the first race and the second race; and a second intermediate member at least partially disposed between the first race and the second race.

Description

Motor unit and derailleur for bicycle component

Citation of related application

The present application claims priority from german patent application No. 10 2022 209746.7 filed on 9.2022, 16. The entire content of german patent application No. 10 2022 209746.7 is incorporated herein by reference.

Technical Field

The present invention relates to a motor unit and a derailleur.

Background

The human powered vehicle includes a motor device coupled to the movable portion to move the movable portion. In the case where the movable portion receives an external force caused by physical contact between the obstacle and the movable portion, an external torque is input to the motor device. It is preferable to protect the motor device from such external forces.

Disclosure of Invention

According to a first aspect of the present invention, a motor unit for a bicycle component includes a torque limiter and a transmission structure. The torque limiter includes a first member and a second member. The first member and the second member are movable relative to each other in a state where torque applied to the torque limiter is equal to or greater than a torque threshold. The first member and the second member are movable with each other in a state where the torque is less than the torque threshold. The drive structure has a drive structure rotational axis. The transmission structure comprises: a first race (race); a second race; a first intermediate member at least partially disposed between the first race and the second race; and a second intermediate member at least partially disposed between the first race and the second race. The first intermediate member is configured to move toward the first race in response to the first intermediate member being urged in a first circumferential direction by the second race relative to the transmission structure rotational axis. The first intermediate member is configured to move toward the first race in response to the first intermediate member being urged by the second race in a second circumferential direction different from the first circumferential direction. The first intermediate member is configured to move away from the first race in response to the first intermediate member being urged in a first circumferential direction by the second intermediate member. The first intermediate member is configured to move away from the first race in response to the first intermediate member being urged by the second intermediate member in a second circumferential direction different from the first circumferential direction.

With the motor unit according to the first aspect, the relative movement between the first member and the second member reduces the output torque transmitted via the torque limiter in a state where the torque applied to the torque limiter is equal to or greater than the torque threshold value. Further, using the first race, the second race, the first intermediate member, and the second intermediate member, the transmission structure limits torque transfer from the second race to the second intermediate member and allows torque transfer from the second intermediate member to the second race. The torque limiter and transmission structure reduce or block external forces applied to at least one of the movable member and the linkage (linkage). Accordingly, the electric motor can be protected from an external force applied to at least one of the movable member and the linkage.

According to a second aspect of the present invention, the motor unit according to the first aspect is configured such that the first intermediate member is configured to rotate together with the first race in a state in which the second race pushes the first intermediate member and the second intermediate member does not push the first intermediate member.

With the motor unit according to the second aspect, the transmission structure reliably restricts the transmission of torque from the second race to the second intermediate member using the first race, the second race, and the first intermediate member.

According to a third aspect of the present invention, the motor unit according to the first or second aspect is configured such that the first intermediate member is configured to rotate relative to the first race in a state in which the second intermediate member pushes the first intermediate member and the second race does not push the first intermediate member.

With the motor unit according to the third aspect, the transmission structure reliably allows torque to be transmitted from the second race to the second intermediate member using the first race, the second race, the first intermediate member, and the second intermediate member.

According to a fourth aspect of the present invention, the motor unit according to any one of the first to third aspects further includes an electric motor, an output member, and a decelerator. The decelerator couples the electric motor and the output member to transmit an output torque of the electric motor to the output member.

With the motor unit according to the fourth aspect, the output torque can be transmitted from the electric motor to the output member.

According to a fifth aspect of the present invention, the motor unit according to any one of the first to fourth aspects is configured such that the speed reducer includes a torque limiter and a transmission structure.

With the motor unit according to the fifth aspect, the motor unit can be made compact while protecting the electric motor from external force.

According to a sixth aspect of the present invention, the motor unit according to any one of the first to fifth aspects is configured such that the transmission structure is provided between the electric motor and the torque limiter on a power transmission path provided from the electric motor to the output member.

With the motor unit according to the sixth aspect, the electric motor can be reliably protected from the external force.

According to a seventh aspect of the present invention, the motor unit according to any one of the fourth to sixth aspects is configured such that the transmission structure is configured to transmit the first torque in a first load direction defined from the electric motor to the output member. The transmission structure is configured to transmit a second torque in a second load direction defined from the output member to the electric motor. The first torque is greater than the second torque.

With the motor unit according to the seventh aspect, the torque applied to the transmission structure in the second load direction can be reduced.

According to an eighth aspect of the present invention, the motor unit according to any one of the fourth to seventh aspects is configured such that the second member is configured to transmit the third torque to the first member in a second load direction defined from the output member to the electric motor in a state in which the external torque input to the output member is smaller than the external torque threshold value. The second member is configured to transmit a fourth torque to the first member in a second load direction in a state where the external torque is equal to or greater than the external torque threshold. The third torque is greater than the fourth torque.

With the motor unit according to the eighth aspect, it is possible to reliably reduce the torque applied to the torque limiter in a state where the external torque input to the output member is equal to or greater than the external torque threshold value.

According to a ninth aspect of the present invention, the motor unit according to any one of the first to eighth aspects is configured such that the torque limiter has a limiter rotation axis. The drive structure has a drive structure rotational axis. The limiter rotation axis does not coincide with the transmission structure rotation axis.

With the motor unit according to the ninth aspect, the torque limiter and the transmission structure can be arranged in different positions. Therefore, the design flexibility of the motor unit can be improved.

According to a tenth aspect of the present invention, the motor unit according to any one of the first to ninth aspects is configured such that the torque limiter has a limiter rotation axis. The limiter rotation axis is parallel to the transmission structure rotation axis.

With the motor unit according to the tenth aspect, it is easier to arrange the torque limiter and the transmission structure in different positions. Therefore, the design flexibility of the motor unit can be reliably improved.

According to an eleventh aspect of the present invention, the motor unit according to any one of the first to tenth aspects is configured such that the torque limiter has a limiter rotation axis. The rotation axis of the limiter coincides with the rotation axis of the transmission structure.

With the motor unit according to the eleventh aspect, the space in which the torque limiter and the transmission structure are provided can be reduced.

According to a twelfth aspect of the present invention, the motor unit according to any one of the first to eleventh aspects is configured such that the first member slidably contacts the second member to transmit a third torque between the first member and the second member in a state in which an external torque input to the output member is less than an external torque threshold. The first member slidably contacts the second member to transmit a fourth torque between the first member and the second member in a state where the external torque is equal to or greater than the external torque threshold. The third torque is greater than the fourth torque.

With the motor unit according to the twelfth aspect, it is possible to reliably reduce the torque applied to the torque limiter in a state where the external torque input to the output member is smaller than the external torque threshold value.

According to a thirteenth aspect of the present invention, the motor unit according to the first to twelfth aspects is configured such that one of the first member and the second member includes a recess. The other of the first member and the second member includes a protruding portion. The protruding portion is configured to engage in the recess in a state where the torque is less than the torque threshold to transmit a third torque between the first member and the second member. The protruding portion is configured to disengage from the recess in a state where the torque is equal to or greater than the torque threshold to transmit a fourth torque between the first member and the second member. The third torque is greater than the fourth torque.

With the motor unit according to the thirteenth aspect, it is possible to reduce the torque applied to the torque limiter in a state where the torque is equal to or greater than the torque threshold value with a relatively simple structure.

According to a fourteenth aspect of the present invention, the motor unit according to any one of the first to thirteenth aspects further comprises a gear wheel fastened to the first member to transmit torque from the transmission structure to the first member.

With the motor unit according to the fourteenth aspect, torque can be reliably transmitted from the transmission structure to the first member via the gear.

According to a fifteenth aspect of the present invention, the motor unit according to any one of the first to fourteenth aspects is configured such that the torque limiter includes a biasing member configured to bias at least one of the first member and the second member to maintain a contact state between the first member and the second member.

With the motor unit according to the fifteenth aspect, the contact state between the first member and the second member can be maintained with a relatively simple structure.

According to a sixteenth aspect of the present invention, the motor unit according to any one of the first to fifteenth aspects further includes a detection object configured to be detected by the detector. The detection object is disposed on the downstream side with respect to the power transmission structure on the power transmission path.

With the motor unit according to the sixteenth aspect, the state of the motor unit or the bicycle component can be detected using the detection object.

According to a seventeenth aspect of the present invention, the motor unit according to any one of the first to sixteenth aspects further includes a detection object configured to be detected by the detector. The detection object is disposed on the downstream side with respect to the torque limiter on the power transmission path.

With the motor unit according to the seventeenth aspect, the state of the motor unit or the bicycle component can be detected using the detection object.

According to an eighteenth aspect of the present invention, the motor unit according to any one of the first to seventeenth aspects is configured such that the transmission structure is coupled to the torque limiter. The transmission structure is configured to transmit the first torque to the torque limiter in a state in which the first input torque is applied to the transmission structure from a device other than the torque limiter. The transmission structure is configured to transmit the second torque in a state in which the second input torque is applied from the torque limiter to the transmission structure. The first torque is greater than the second torque.

With the motor unit according to the eighteenth aspect, it is possible to reduce the torque applied from the torque limiter to the transmission structure in a state where the second input torque is applied from the torque limiter to the transmission structure.

According to a nineteenth aspect of the present invention, a derailleur includes a base member, a movable member, a linkage, and a motor unit according to any one of the first to eighteenth aspects. The linkage movably couples the base member and the movable member. The motor unit is disposed at one of the base member, the movable member, and the linkage.

With the derailleur according to the nineteenth aspect, design flexibility of the derailleur can be improved.

According to a twentieth aspect of the present invention, the derailleur according to the nineteenth aspect further includes a power supply attachment structure to which a power source is to be attached. The power supply attachment structure is disposed at one of the base member, the movable member, and the linkage.

With the derailleur according to the twentieth aspect, the power source can be mounted via the power supply attachment structure. Therefore, a cable for supplying electric power from another power source to the motor unit can be omitted.

According to a twentieth aspect of the present invention, the derailleur according to the twentieth aspect is configured such that the motor unit is disposed at one of the base member, the movable member and the linkage. The power supply attachment structure is disposed at the other of the base member, the movable member, and the linkage.

With the derailleur according to the twenty-first aspect, design flexibility of the derailleur can be improved while omitting cables.

According to a twenty-second aspect of the present invention, the derailleur according to the twentieth or the twentieth aspect is configured such that the motor unit is provided at one of the base member and the linkage. The power supply attachment structure is disposed at the other of the base member and the linkage.

With the derailleur according to the twenty-second aspect, design flexibility of the derailleur can be reliably improved while omitting cables.

According to a twenty-third aspect of the present invention, a motor unit for a bicycle component includes an output member, an electric motor, a torque limiter and a transmission structure. The electric motor includes an output shaft. The torque limiter is arranged entirely inside the housing of the motor unit. The transmission structure is configured to transmit a first torque in a first load direction defined from the output shaft to the output member and is configured to transmit a second torque in a second load direction defined from the output member to the output shaft. The transmission structure is configured to transmit torque in a plurality of rotational directions based on a rotational direction of the output shaft in a state in which the transmission structure transmits torque in the first load direction. The first torque is greater than the second torque.

With the motor unit according to the twenty-third aspect, since the torque limiter is provided inside the housing, the structure of the motor unit can be simplified. Further, using the first race, the second race, the first intermediate member, and the second intermediate member, the transmission structure limits torque transfer from the second race to the second intermediate member and allows torque transfer from the second intermediate member to the second race. Accordingly, the electric motor can be protected from the external force applied to at least one of the movable member and the linkage with a relatively simple structure.

According to a twenty-fourth aspect of the present invention, the motor unit according to the twenty-third aspect is configured such that the torque limiter is configured to transmit the third torque in a state where the torque input to the torque limiter is smaller than the torque threshold value. The torque limiter is configured to transmit a fourth torque in a state where the torque input to the torque limiter is equal to or greater than the torque threshold. The third torque is greater than the fourth torque.

With the motor unit according to the twenty-fourth aspect, it is possible to reduce the torque applied to the torque limiter in a state where the torque is equal to or greater than the torque threshold value with a relatively simple structure.

According to a twenty-fifth aspect of the present invention, the motor unit according to the twenty-fourth aspect is configured such that the torque limiter includes a first member and a second member. The first member and the second member are in contact with each other to transmit a third torque between the first member and the second member in a state where the torque is less than the torque threshold. The first member and the second member are configured to transmit a fourth torque between the first member and the second member in a state where the torque is equal to or greater than the torque threshold.

With the motor unit according to the twenty-fifth aspect, the relative movement between the first member and the second member reduces the output torque transmitted via the torque limiter in a state where the torque applied to the torque limiter is equal to or greater than the torque threshold value. Accordingly, the electric motor can be reliably protected from the external force applied to at least one of the movable member and the linkage with a relatively simple structure.

Drawings

A more complete appreciation of the invention and many of the attendant advantages thereof will be readily obtained as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings.

FIG. 1 is a side elevational view of a bicycle that includes a derailleur in accordance with a first embodiment.

FIG. 2 is a side elevational view of the derailleur of the bicycle illustrated in FIG. 1.

FIG. 3 is a side elevational view of the derailleur illustrated in FIG. 2.

FIG. 4 is a rear elevational view of the derailleur illustrated in FIG. 2.

FIG. 5 is a top plan view of the derailleur illustrated in FIG. 2.

FIG. 6 is an exploded perspective view of the derailleur illustrated in FIG. 2.

FIG. 7 is an exploded perspective view of the derailleur illustrated in FIG. 2.

Fig. 8 is a perspective view of the internal structure of the motor unit of the derailleur illustrated in fig. 2.

Fig. 9 is a perspective view of the internal structure of the motor unit of the derailleur illustrated in fig. 2.

Fig. 10 is an exploded perspective view of the internal structure of the motor unit of the derailleur illustrated in fig. 2.

FIG. 11 is a perspective view of a torque limiter of the motor unit of the derailleur illustrated in FIG. 2.

Fig. 12 is a perspective view of a biasing member of the torque limiter of the motor unit shown in fig. 8.

Fig. 13 is an exploded perspective view of the first and second members of the torque limiter of the motor unit shown in fig. 8.

Fig. 14 is an exploded perspective view of the first and second members of the torque limiter of the motor unit shown in fig. 8.

Fig. 15 is a side elevation view of the first and second members of the torque limiter of the motor unit shown in fig. 8.

FIG. 16 is a cross-sectional view of the derailleur illustrated in FIG. 2.

FIG. 17 is a cross-sectional view of the derailleur illustrated in FIG. 2.

Fig. 18 is a sectional view (neutral position) of the transmission structure of the motor unit shown in fig. 8.

FIG. 19 is a cross-sectional view of the derailleur illustrated in FIG. 8, as seen in FIG. 2.

Fig. 20 is a sectional view (first rotational position) of the transmission structure of the motor unit shown in fig. 8.

Fig. 21 is a sectional view (second rotational position) of the transmission structure of the motor unit shown in fig. 8.

FIG. 22 is a schematic block diagram of the derailleur illustrated in FIG. 2.

FIG. 23 is a side elevational view of a derailleur in accordance with a second embodiment.

FIG. 24 is a side elevational view of the derailleur illustrated in FIG. 23.

FIG. 25 is a rear elevational view of the derailleur illustrated in FIG. 23.

FIG. 26 is a perspective view of the derailleur illustrated in FIG. 23.

FIG. 27 is an exploded perspective view of the derailleur illustrated in FIG. 23.

FIG. 28 is a cross-sectional view of the derailleur illustrated in FIG. 23.

FIG. 29 is a perspective view of the inner link and motor unit of the derailleur illustrated in FIG. 23.

FIG. 30 is a perspective view of the inner link and motor unit of the derailleur illustrated in FIG. 23.

Fig. 31 is a perspective view of the internal structure of the motor unit of the derailleur illustrated in fig. 23.

Fig. 32 is an exploded perspective view of the internal structure of the motor unit of the derailleur illustrated in fig. 23.

FIG. 33 is a perspective view of the torque limiter of the motor unit of the derailleur illustrated in FIG. 23.

FIG. 34 is a cross-sectional view of the torque limiter of the motor unit of the derailleur illustrated in FIG. 23.

FIG. 35 is a cross-sectional view of the torque limiter of the motor unit of the derailleur illustrated in FIG. 23.

Fig. 36 is an exploded perspective view of the first and second members of the torque limiter of the motor unit shown in fig. 31.

Fig. 37 is an exploded perspective view of the first and second members of the torque limiter of the motor unit shown in fig. 31.

Fig. 38 is a side elevation view of the first and second members of the torque limiter of the motor unit shown in fig. 31.

FIG. 39 is a cross-sectional view of the derailleur illustrated in FIG. 23.

FIG. 40 is a schematic block diagram of the derailleur illustrated in FIG. 23.

Detailed Description

Embodiments will now be described with reference to the drawings, wherein like reference numerals designate corresponding or identical elements throughout the various figures.

First embodiment

As shown in fig. 1, according to a first embodiment, a bicycle 2 includes a bicycle component RD. The bicycle 2 further includes a vehicle body 2A, a saddle 2B, a handlebar 2C, an operating device 3, an operating device 4 and a drive train DT. The operating devices 3 and 4 are configured to be mounted to the handlebar 2C. The drive train DT includes a crank CR, a front sprocket assembly FS, a rear sprocket assembly RS, a chain C, a bicycle component FD and a bicycle component RD. The front sprocket assembly FS is fixed to the crank CR. The rear sprocket assembly RS is rotatably mounted to the vehicle body 2A. The chain C is engaged with the front and rear sprocket assemblies FS, RS. The bicycle component RD is mounted to the vehicle body 2A and is configured to shift the chain C relative to a plurality of sprockets of the rear sprocket assembly RS to change gears. The bicycle component FD is configured to shift the chain C relative to a plurality of sprockets of the front sprocket assembly FS.

The bicycle component RD is configured to be operated using the operating device 3. The bicycle component FD is configured to be operated using the operating device 4. The bicycle component RD is configured to be electrically coupled to the operating devices 3 and 4. The bicycle component RD is configured to be electrically coupled to the bicycle component FD.

In a first embodiment, the bicycle component RD is configured to be wirelessly coupled to the operating devices 3 and 4. The bicycle component RD is configured to be wirelessly coupled to the bicycle component FD. The bicycle component RD can be configured to communicate wirelessly with the bicycle component FD via at least one of a bicycle computer, a smart phone, a tablet computer and a personal computer. The bicycle component RD is configured to change gear in response to a control signal transmitted from the operating device 3. The bicycle component RD is configured to transmit a control signal transmitted from the operating device 4 to the bicycle component FD. The bicycle component FD is configured to change gear in response to a control signal transmitted from the operating device 4 via the bicycle component RD. Each of the bicycle components RD and FD includes a power source (such as a battery). However, at least one of the bicycle components RD and FD can be electrically connected to another power source (such as a battery) via a cable if needed and/or desired. Both the bicycle component RD and the bicycle component FD can be electrically connected to another power source (such as a battery) via a cable if needed and/or desired.

In a first embodiment, the bicycle component RD includes a derailleur, and the bicycle component FD includes a derailleur. That is, the bicycle component RD can also be referred to as a derailleur RD. The bicycle component FD may also be referred to as a derailleur FD. The structure of the bicycle component RD can be applied to other bicycle components (such as the bicycle component FD) if needed and/or desired.

In this application, the following directional terms "forward", "rearward", "left", "right", "transverse", "upward" and "downward" as well as any other similar directional terms refer to a direction determined from a user (e.g., a rider) facing the handlebar 2C in accordance with a user's standard position in the bicycle 2 (e.g., on a seat 2B or seat). Accordingly, these terms, as utilized to describe the bicycle component RD or other components, should be interpreted relative to a bicycle 2 as equipped with the bicycle component RD and used in an upright riding position on a horizontal surface.

As seen in fig. 2, the derailleur RD includes a base member 12, a movable member 14 and a linkage 16. The base member 12 is configured to be coupled to the vehicle body 2A. The movable member 14 is movable relative to the base member 12. The movable member 14 includes a chain guide 18 and a coupling portion 20. The chain guide 18 is pivotally coupled to the attachment portion 20 about a pivot axis PA. The coupling portion 20 is movably coupled to the base member 12 via the linkage 16.

As shown in fig. 3, the chain guide 18 includes a guide plate 22, a guide pulley 24, and a tension pulley 26. The guide plate 22 is pivotally coupled to the coupling portion 20. The guide pulley 24 is rotatably coupled to the guide plate 22. The tensioner 26 is rotatably coupled to the guide plate 22. The guide pulley 24 is configured to engage with the chain C. The tensioner 26 is configured to engage the chain C. The structure of the movable member 14 is not limited to the above structure.

As shown in fig. 2, the linkage 16 movably couples the base member 12 and the movable member 14. The linkage 16 movably couples the base member 12 and the coupling portion 20. In this embodiment, the linkage 16 includes an outer link 28 and an inner link 30. The outer link 28 is pivotally coupled to the base member 12 about a first pivot axis A1. The outer link 28 is pivotally coupled to the movable member 14 about a second pivot axis A2. The inner link 30 is pivotally coupled to the base member 12 about a third pivot axis A3. The inner link 30 is pivotally coupled to the movable member 14 about a fourth pivot axis A4. The first to fourth pivot axes A1 to A4 are parallel to each other. However, one of the outer and inner links 28, 30 may be omitted from the linkage 16 if needed and/or desired. The structure of the linkage 16 is not limited to the above structure. At least one of the first to fourth pivot axes A1 to A4 may not be parallel to the other of the first to fourth pivot axes A1 to A4.

As seen in fig. 4, the inner link 30 is at least partially disposed between the outer link 28 and the lateral center plane CP of the bicycle 2. The lateral center plane CP is defined perpendicular to the rotational axis RA (see, e.g., fig. 2) of the rear sprocket assembly RS (see, e.g., fig. 1).

The derailleur RD includes a motor unit 32. The motor unit 32 is configured to move at least one of the movable member 14 and the linkage 16 relative to the base member 12. In this embodiment, the motor unit 32 is coupled to the linkage 16 to move the movable member 14 via the linkage 16. The motor unit 32 is configured to generate an actuation force and is coupled to the linkage 16 to transmit the actuation force to the linkage 16. However, if needed and/or desired, the motor unit 32 may be directly coupled to the movable member 14 to move the movable member 14 relative to the base member 12.

As seen in fig. 2, the derailleur RD further includes a power supply attachment structure 34 to which a power source 36 is to be attached. The power supply attachment structure 34 is configured to removably retain a power source 36. The power supply attachment structure 34 is electrically connected to the motor unit 32 to supply power from the power source 36 to the motor unit 32. Examples of the power supply 36 include batteries (such as primary batteries and secondary batteries). However, the power supply attachment structure 34 can be omitted from the derailleur RD if needed and/or desired. In this embodiment, the derailleur RD can be configured to be electrically connected to another power source if needed and/or desired.

As shown in fig. 5, the power supply attachment structure 34 is provided at one of the base member 12, the movable member 14, and the linkage 16. A motor unit 32 is provided at one of the base member 12, the movable member 14, and the linkage 16. A power supply attachment structure 34 is provided at the other of the base member 12, the movable member 14, and the linkage 16. A motor unit 32 is provided at one of the base member 12 and the linkage 16. A power supply attachment structure 34 is provided at the other of the base member 12 and the linkage 16.

In this embodiment, the motor unit 32 is provided at the base member 12. A power supply attachment structure 34 is provided at the linkage 16. The power supply attachment structure 34 is provided at the outer link 28. However, the motor unit 32 may be provided at one of the movable member 14 and the linkage 16 if needed and/or desired. The motor unit 32 may be provided at one of the outer link 28 and the inner link 30 if needed and/or desired. The power supply attachment structure 34 may be provided at one of the base member 12 and the movable member 14 if needed and/or desired. The power supply attachment structure 34 may be provided at the inner link 30 if needed and/or desired. The power supply attachment structure 34 may be omitted from the motor unit 32 if needed and/or desired.

As shown in fig. 6, the power supply attachment structure 34 includes a rack space 34A. A power supply 36 is provided in the rack space 34A. The power supply attachment structure 34 is configured to removably retain the power source 36 in the bracket space 34A. The structure of the outer link 28 and the power supply attachment structure 34 is not limited to the illustrated embodiment.

The motor unit 32 includes a housing 38. In this embodiment, the housing 38 is a separate component from the base member 12. However, the housing 38 may be at least partially integrally provided with the base member 12 as a one-piece, unitary member.

The base member 12 includes a first base body 40, a second base body 42, and a fastener 44. The first base body 40 is configured to be coupled to the vehicle body 2A with a derailleur fastener 46. The second base body 42 is a separate member from the first base body 40. The second base body 42 is fastened to the first base body 40 with a plurality of fasteners 44, such as a plurality of bolts. The motor unit 32 is disposed between the first base body 40 and the second base body 42. The housing 38 is held between the first base body 40 and the second base body 42.

As shown in fig. 7, the housing 38 includes a first housing 50 and a second housing 52. The housing 38 includes an interior space 38S. The first housing 50 and the second housing 52 define an interior space 38S between the first housing 50 and the second housing 52. In this embodiment, the second housing 52 is a separate member from the first housing 50. However, the second housing 52 may be provided as a one-piece, unitary member with the first housing 50 if needed and/or desired.

The motor unit 32 for the bicycle component RD includes an electric motor 54. The electric motor 54 is configured to generate an actuation force using power supplied from the power source 36 via the power supply attachment structure 34 (see, e.g., fig. 6). The electric motor 54 is electrically connected to the power supply attachment structure 34. The electric motor 54 is disposed in the inner space 38S of the housing 38. An electric motor 54 is disposed between the first housing 50 and the second housing 52.

The motor unit 32 for the bicycle component RD includes an output member 56. The electric motor 54 is coupled to the output member 56 to rotate the output member 56 relative to the housing 38 about an output rotational axis A5. The output member 56 extends along an output rotational axis A5. In this embodiment, the output rotation axis A5 coincides with the third pivot axis A3. The output member 56 is rotatable relative to the housing 38 about a third pivot axis A3. The inner link 30 is rotatable relative to the base member 12 about an output rotation axis A5. However, the output rotation axis A5 may be offset from the third pivot axis A3 if needed and/or desired.

The inner link 30 is coupled to the output member 56 to receive an actuation force from the output member 56 that is transmitted from the electric motor 54 to the output member 56. The inner link 30 is coupled to the output member 56 for rotation with the output member 56 about the third pivot axis A3 relative to the housing 38 and the base member 12. The inner link 30 includes an inner link body 30A, an inner link shank 30B, and a fastener 30C. The inner link body 30A is pivotally coupled to the base member 12 about a third pivot axis A3. The inner link body 30A is pivotally coupled to the movable member 14 about a fourth pivot axis A4. The inner link shank 30B is fastened to the inner link body 30A with a fastener 30C. The inner linkage handle 30B is coupled to the output member 56 to receive the actuation force transmitted from the electric motor 54 from the output member 56. The inner lever handle 30B is coupled to the output member 56 for rotation with the output member 56 about the third pivot axis A3 relative to the housing 38 and the base member 12.

External force EF is applied to at least one of the movable member 14 and the linkage 16 in response to physical contact between the obstacle and at least one of the movable member 14 and the linkage 16. Accordingly, an external rotational force ERF having an external torque ET is applied to the output member 56 via the linkage 16 in response to the external force EF. It is preferable to limit the transmission of external torque ET from at least one of the movable member 14 and the linkage 16 to the electric motor 54.

As shown in fig. 8, the motor unit 32 for the bicycle component RD includes a torque limiter 60 and a transmission structure 62. The torque limiter 60 is configured to protect the electric motor 54 from damage caused by the external force EF while allowing the necessary force to be transmitted from the electric motor 54 to at least one of the movable member 14 and the linkage 16. The transmission structure 62 is configured to protect the electric motor 54 from damage caused by the external force EF while allowing the actuation force generated by the electric motor 54 to be transmitted to at least one of the movable member 14 and the linkage 16. The structure of the torque limiter 60 is different from the structure of the transmission structure 62.

The torque limiter 60 and the transmission structure 62 are disposed between the electric motor 54 and the output member 56 on a power transmission path TP provided from the electric motor 54 to the output member 56. The transmission structure 62 is provided between the electric motor 54 and the torque limiter 60 on a power transmission path TP provided from the electric motor 54 to the output member 56. The torque limiter 60 is disposed between the transmission structure 62 and the output member 56 on the power transmission path TP. A power transmission path TP is defined from the electric motor 54 to the output member 56 through the transmission 62 and the torque limiter 60.

The torque limiter 60 and the transmission structure 62 are configured to transmit an actuation force generated by the electric motor 54 to at least one of the movable member 14 and the linkage 16. The torque limiter 60 is configured to limit the transmission of force from one of the movable member 14 and the linkage 16 to the transmission structure 62. The transmission structure 62 is configured to limit the transmission of force from the torque limiter 60 to the electric motor 54.

The motor unit 32 further includes a decelerator 63. The decelerator 63 couples the electric motor 54 and the output member 56 to transmit the output torque T0 of the electric motor 54 to the output member 56. In this embodiment, the decelerator 63 includes a torque limiter 60 and a transmission structure 62. However, one of the torque limiter 60 and the transmission structure 62 may be omitted from the decelerator 63 if needed and/or desired. The speed reducer 63 may include structures other than the torque limiter 60 and the transmission structure 62, if needed and/or desired, in addition to the torque limiter 60 and the transmission structure 62.

The electric motor 54 includes an output shaft 54A. The electric motor 54 includes a motor gear 54B and a motor housing 54C. The motor gear 54B is fastened to the output shaft 54A. The electric motor 54 is configured to rotate the output shaft 54A relative to the motor housing 54C about a motor rotation axis A9. The electric motor 54 is configured to generate an output torque T0.

As shown in fig. 9, the electric motor 54 is coupled to a transmission structure 62. The electric motor 54 is coupled to the transmission structure 62 via at least one gear. The decelerator 63 includes gears G1, G2, G3, G4, and G5. That is, the motor unit 32 includes gears G1 to G5. The electric motor 54 is coupled to the transmission structure 62 via gears G1 to G5. The gear G1 meshes with a motor gear 54B of the electric motor 54. Gear G2 may rotate with gear G1 relative to housing 38 (see, e.g., fig. 16). Gear G2 meshes with gear G3. Gear G4 may rotate with gear G3 relative to housing 38 (see, e.g., fig. 16). Gear G4 meshes with gear G5. The transmission structure 62 is coupled to the gear G5 to receive the actuation force generated by the electric motor 54 via the gears G1 to G5.

The transmission structure 62 is coupled to the torque limiter 60. The transmission structure 62 is coupled to the torque limiter 60 via at least one gear. The decelerator 63 includes gears G6 and G7. That is, the motor unit 32 further includes a gear G7. The transmission structure 62 is coupled to the torque limiter 60 via gears G6 and G7. Gear G6 is coupled to drive structure 62 to receive rotational force from drive structure 62. Gear G7 meshes with gear G6. Gear G7 is coupled to torque limiter 60 to transmit rotational force between torque limiter 60 and gear G7.

As shown in fig. 8, the transmission structure 62 is configured to transmit a first torque T1 in a first load direction LD1 defined from the electric motor 54 to the output member 56. The transmission structure 62 is configured to transmit a first torque T1 in a first load direction LD1 defined from the output shaft 54A to the output member 56. The transmission structure 62 is configured to transmit the first torque T1 to the torque limiter 60 in a state where the first input torque T11 is applied to the transmission structure 62 from a device other than the torque limiter 60.

The transmission structure 62 is configured to receive a first input torque T11 from the electric motor 54 via the gear G5 in the first load direction LD 1. The transmission structure 62 is configured to transmit a first torque T1 to the gear G6 in the first load direction LD 1. The first torque T1 may also be referred to as a first output torque T1. In this embodiment, the first torque T1 is equal to the first input torque T11. However, the first torque T1 may be different from the first input torque T11 if needed and/or desired.

The transmission structure 62 is configured to transmit a second torque T2 in a second load direction LD2 defined from the output member 56 to the electric motor 54. The transmission structure 62 is configured to transmit a second torque T2 in a second load direction LD2 defined from the output member 56 to the output shaft 54A. The transmission structure 62 is configured to transmit the second torque T2 in a state where the second input torque T21 is applied from the torque limiter 60 to the transmission structure 62.

The transmission structure 62 is configured to receive the second input torque T21 from the torque limiter 60 via the gear G6 in the second load direction LD 2. The transmission structure 62 is configured to transmit the second torque T2 to the gear G5 in the second load direction LD 2. The second torque T2 may also be referred to as a second output torque T2.

In this embodiment, the second torque T2 is smaller than the second input torque T12. The second torque T2 may include zero. The second torque T2 may be zero. The transmission structure 62 is configured to reduce the second input torque T21 to a second torque T2 in the second load direction LD 2. The transmission structure 62 is configured to limit transmission of the second input torque T21 to the gear G5 via the transmission structure 62 in the second load direction LD 2. The transmission structure 62 is configured to limit torque transmission to the gear G5 in the second load direction LD 2. Accordingly, the transmission structure 62 is configured not to transmit torque transmitted to the transmission structure 62 in the second load direction LD2 to the electric motor 54. However, the second torque T2 may be greater than zero if needed and/or desired.

The first torque T1 is greater than the second torque T2. In other words, the second torque T2 transmitted via the transmission structure 62 in the second load direction LD2 is smaller than the first torque T1 transmitted via the transmission structure 62 in the first load direction LD 1. However, the first torque T1 may be equal to or less than the second torque T2 if needed and/or desired.

As shown in fig. 8, the decelerator 63 includes a gear G8. Gear G8 is coupled to torque limiter 60. The output member 56 includes a shaft 56S and an output gear G9. Shaft 56S extends along output rotation axis A5. The output gear G9 is coupled to the shaft 56S to rotate with the shaft 56S about the output rotation axis A5. The gear G8 meshes with the output gear G9.

The torque limiter 60 is configured to receive the third input torque T31 from the gear G7 in the first load direction LD 1. The torque limiter 60 is configured to transmit the third output torque T32 or the limited output torque T33 to the gear G8 in the first load direction LD 1.

The torque limiter 60 is configured to transmit a third output torque T32 equal to the third input torque T31 to the gear G8 in the first load direction LD1 in a state where the third input torque T31 is smaller than the torque threshold. The torque limiter 60 is configured to transmit a limited output torque T33 smaller than the third input torque T31 to the gear G8 in the first load direction LD1 in a state where the third input torque T31 is equal to or larger than the torque threshold. The torque limiter 60 is configured to reduce the third input torque T31 to the limited output torque T33 in a state where the third input torque T31 is equal to or greater than the torque threshold value.

In this embodiment, the limited output torque T33 is less than the torque threshold. The limited output torque T33 may include zero. The limited output torque T33 may be zero or approximately zero. However, the limited output torque T33 may be greater than zero if needed and/or desired.

The torque limiter 60 is configured to receive the third input torque T31 from the electric motor 54 via the transmission structure 62 and the gears G1-G7. The torque threshold is greater than the maximum possible value of the third input torque T31. Thus, the torque limiter 60 is configured to transmit the output torque T33 to the gear G8 when the torque limiter 60 receives the third input torque T31 from the electric motor 54 via the transmission structure 62 and the gears G1 to G7.

As shown in fig. 8, the torque limiter 60 is configured to receive the fourth input torque T41 from the gear G8 in the second load direction LD 2. The torque limiter 60 is configured to transmit the fourth output torque T42 or the limited output torque T43 to the gear G7 in the second load direction LD 2.

The torque limiter 60 is configured to transmit a fourth output torque T42 equal to the fourth input torque T41 to the gear G7 in the second load direction LD2 in a state where the fourth input torque T41 is smaller than the torque threshold. The torque limiter 60 is configured to transmit a limited output torque T43 smaller than the fourth input torque T41 to the gear G7 in the second load direction LD2 in a state where the fourth input torque T41 is equal to or larger than the torque threshold. The torque limiter 60 is configured to reduce the fourth input torque T41 to the limited output torque T43 in a state where the fourth input torque T41 is equal to or greater than the torque threshold value.

In this embodiment, the limited output torque T43 is less than the fourth output torque T42 and the torque threshold. The limited output torque T43 may include zero. The limited output torque T43 may be zero or approximately zero. The fourth output torque T42 may also be referred to as a third torque T42. The limited output torque T43 may also be referred to as a fourth torque T43. The third torque T42 is greater than the fourth torque T43. In other words, the fourth torque T43 is smaller than the third torque T42. However, the limited output torque T43 may be greater than zero if needed and/or desired.

When the external torque ET is applied to the output member 5 from at least one of the movable member 14 and the linkage 16, a fourth input torque T41 is applied to the torque limiter 60 from the output member 56.

The torque limiter 60 is configured to transmit the third torque T42 in a state where the torque input to the torque limiter 60 is less than the torque threshold. The torque limiter 60 is configured to transmit the third torque T42 in the second load direction LD2 in a state where the fourth input torque T41 is smaller than the torque threshold value. The torque limiter 60 is configured to transmit the fourth torque T43 in a state where the torque input to the torque limiter 60 is equal to or greater than the torque threshold value. The torque limiter 60 is configured to transmit the fourth torque T43 in the second load direction LD2 in a state where the fourth input torque T41 is equal to or greater than the torque threshold value. In other words, the torque limiter 60 is configured to transmit the third torque T42 in the second load direction LD2 in a state where the external torque ET is smaller than the external torque threshold. The torque limiter 60 is configured to transmit the fourth torque T43 in the second load direction LD2 in a state where the external torque ET is equal to or greater than the external torque threshold. The external torque threshold is a criterion for determining the external torque ET applied to the output member 56, while the torque threshold is a criterion for determining the fourth input torque T41 applied to the torque limiter 60.

As shown in fig. 8, the torque limiter 60 includes a first member 64 and a second member 66. The first member 64 and the second member 66 are movable relative to each other in a state where the torque applied to the torque limiter 60 is equal to or greater than a torque threshold. The first member 64 and the second member 66 are movable with each other in a state where the torque is less than the torque threshold. The first member 64 and the second member 66 contact each other to transmit the third torque T42 between the first member 64 and the second member 66 in a state where the torque is less than the torque threshold. The first and second members 64, 66 are configured to transmit a fourth torque T43 between the first and second members 64, 66 in a state where the torque is equal to or greater than the torque threshold.

The first and second members 64, 66 may be in sliding contact with each other to transmit a third torque T42 between the first and second members 64, 66 in a state where the torque is less than a torque threshold. The first member 64 and the second member 66 are movable relative to each other in a state where the third input torque T31 applied to the first member 64 is equal to or greater than the torque threshold. The first member 64 is movable relative to the second member 66 in a state where the third input torque T31 applied to the first member 64 is equal to or greater than the torque threshold. The first member 64 and the second member 66 are movable with each other in a state where the third input torque T31 is less than the torque threshold.

The first member 64 and the second member 66 are movable relative to each other in a state where the fourth input torque T41 applied to the torque limiter 60 is equal to or greater than the torque threshold. The second member 66 is movable relative to the first member 64 in a state where a fourth input torque T41 applied to the second member 66 is equal to or greater than a torque threshold. The first member 64 and the second member 66 are movable with each other in a state where the fourth input torque T41 is less than the torque threshold.

Gear G7 is secured to first member 64 to transmit torque from transmission structure 62 to first member 64. In this embodiment, the gear G7 is integrally provided with the first member 64 as a one-piece, unitary member. However, gear G7 may be a separate component from first component 64 if needed and/or desired.

The second member 66 is configured to transmit the third torque T42 to the first member 64 in a second load direction LD2 defined from the output member 56 to the electric motor 54 in a state where the external torque ET input to the output member 56 is less than the external torque threshold. The second member 66 is configured to transmit the fourth torque T43 to the first member 64 in the second load direction LD2 in a state where the external torque ET is equal to or greater than the external torque threshold.

The first member 64 slidably contacts the second member 66 to transfer the third torque T42 between the first member 64 and the second member 66 in a state where the external torque ET input to the output member 56 is less than the external torque threshold. The first member 64 slidably contacts the second member 66 to transmit a fourth torque T43 between the first member 64 and the second member 66 in a state where the external torque ET is equal to or greater than the external torque threshold.

The torque limiter 60 has a limiter rotation axis A6. The first member 64 is rotatable relative to the housing 38 (see, e.g., fig. 7) about a limiter rotation axis A6. The second member 66 is rotatable relative to the housing 38 (see, e.g., fig. 7) about a limiter rotation axis A6. The first member 64 and the second member 66 are rotatable relative to each other about the limiter rotation axis A6 in a state where the torque applied to the torque limiter 60 is equal to or greater than the torque threshold. The first member 64 and the second member 66 are rotatable with each other about the limiter rotation axis A6 in a state where the torque applied to the torque limiter 60 is less than the torque threshold.

As shown in fig. 10, the torque limiter 60 includes a support shaft 67. The support shaft 67 extends along the limiter rotation axis A6. The support shaft 67 is rotatably supported by the housing 38 (see, for example, fig. 7). The first member 64 is rotatable about the limiter rotation axis A6 with respect to the support shaft 67. The second member 66 is coupled to the support shaft 67 to rotate with the support shaft 67 about the limiter rotation axis A6. The support shaft 67 movably supports the second member 66. The second member 66 is movable relative to the support shaft 67 along the limiter rotation axis A6.

The gear G8 is coupled to the support shaft 67. In this embodiment, the gear G8 is provided integrally with the support shaft 67 as a one-piece, unitary member. However, the gear G8 may be a separate member from the support shaft 67 if needed and/or desired.

The gear G8 meshes with an output gear G9 of the output member 56. Accordingly, the output member 56 rotates about the output rotation axis A5 in response to rotation of the second member 66 and the support shaft 67 about the limiter rotation axis A6. The second member 66 and the support shaft 67 rotate about the limiter rotation axis A6 in response to rotation of the output member 56 about the output rotation axis A5.

As shown in fig. 10, the torque limiter 60 includes a guide member 76. The guide member 76 is coupled to the support shaft 67 to guide the second member 66 along the limiter rotation axis A6. The guide member 76 is coupled to the support shaft 67 to rotate about the limiter rotation axis A6 together with the support shaft 67. The guide member 76 is fastened to the support shaft 67.

The support shaft 67 includes a spline portion 67A. The guide member 76 includes a splined bore 76A. The spline portion 67A of the support shaft 67 is engaged with the spline hole 76A of the guide member 76. The spline portion 67A is fastened to the spline hole 76A with fastening structures such as press-fitting and adhesive. Thus, the guide member 76 is fastened to the support shaft 67 via the spline portion 67A and the spline hole 76A. The guide member 76 is coupled to the support shaft 67 to rotate about the limiter rotation axis A6 together with the support shaft 67.

The guide member 76 includes a guide base 76B and at least one first guide portion 76G. The guide base 76B includes a splined hole 76A. The guide base 76B has an annular shape. In this embodiment, the guide member 76 includes at least two first guide portions 76G. The first guide portion 76G extends from the guide base 76B along the limiter rotation axis A6. At least two first guide portions 76G are circumferentially spaced from each other about the limiter rotation axis A6.

The second member 66 includes a base portion 66A and a second guide portion 66G. The base portion 66A has an annular shape. In this embodiment, the second member 66 includes at least two second guide portions 66G. The second guide portion 66G extends from the base portion 66A along the limiter rotation axis A6. At least two second guide portions 66G are circumferentially spaced from each other about the limiter rotation axis A6.

In this embodiment, the total number of the first guide portions 76G is three. The total number of the second guide portions 66G is three. However, the total number of the first guide portions 76G is not limited to three. The total number of the second guide portions 66G is not limited to three.

As shown in fig. 11, at least two second guide portions 66G are engaged with at least two first guide portions 76G. The second guide portion 66G is circumferentially disposed between adjacent ones of the at least two first guide portions 76G. The first guide portion 76G is circumferentially disposed between adjacent ones of the at least two second guide portions 66G. Therefore, the second member 66 can move along the limiter rotation axis A6 with respect to the support shaft 67 and the guide member 76 without rotating with respect to the support shaft 67.

The torque limiter 60 includes a biasing member 78. The biasing member 78 is configured to bias at least one of the first member 64 and the second member 66 to maintain a contact state between the first member 64 and the second member 66. The biasing member 78 is configured to bias at least one of the first member 64 and the second member 66 to maintain a slidable contact between the first member 64 and the second member 66. The biasing member 78 is disposed between the second member 66 and the guide member 76. The biasing member 78 is disposed between the base portion 66A and the guide base 76B. The first guide portion 76G and the second guide portion 66G are provided in the biasing member 78.

As shown in fig. 12, in this embodiment, the biasing member 78 comprises a helical wave spring. However, the biasing member 78 may also include other members such as a disc spring, a coil spring, and an elastic member (e.g., rubber) in place of or in addition to the coil wave spring, if needed and/or desired. In fig. 8-11, the biasing member 78 is depicted in a simplified manner.

As shown in fig. 11, the biasing member 78 is configured to bias the second member 66 toward the first member 64 to maintain a contact state between the first member 64 and the second member 66. The biasing member 78 is configured to bias the second member 66 toward the first member 64 to maintain a slidable contact between the first member 64 and the second member 66.

However, the biasing member 78 may be configured to bias the first member 64 toward the second member 66 to maintain the contact state between the first member 64 and the second member 66, if needed and/or desired. If needed and/or desired, the biasing member 78 may be configured to bias the first member 64 and the second member 66 toward each other to maintain a contact state between the first member 64 and the second member 66. If needed and/or desired, the biasing member 78 may be configured to bias the first member 64 toward the second member 66 to maintain a slidable contact between the first member 64 and the second member 66. If needed and/or desired, the biasing member 78 may be configured to bias the first member 64 and the second member 66 toward each other to maintain a slidable contact state between the first member 64 and the second member 66.

As shown in fig. 13 and 14, one of the first member 64 and the second member 66 includes a recess. The other of the first member 64 and the second member 66 includes a protruding portion. In this embodiment, the first member 64 includes a recess 64R. The second member 66 includes a recess 66R. The base portion 66A of the second member 66 includes a recess 66R. The first member 64 includes a protruding portion 64P. The second member 66 includes a protruding portion 66P. The base portion 66A of the second member 66 includes a protruding portion 66P.

More specifically, the first member 64 includes at least two recesses 64R. The second member 66 includes at least two recesses 66R. The base portion 66A of the second member 66 includes at least two recesses 66R. The first member 64 includes at least two protruding portions 64P. The second member 66 includes at least two protruding portions 66P. The base portion 66A of the second member 66 includes at least two protruding portions 66P. The recess 64R is provided between adjacent two of the at least two protruding portions 64P. The recess 66R is provided between adjacent two of the at least two protruding portions 66P. However, only one of the first member 64 and the second member 66 may include a recess if needed and/or desired. Only the other of the first member 64 and the second member 66 may include a protruding portion if needed and/or desired.

As shown in fig. 11, the protruding portion 64P is configured to engage in the recess 66R in a state where the torque (e.g., the fourth input torque T41) is smaller than the torque threshold value to transmit the third torque T42 between the first member 64 and the second member 66. The protruding portion 64P is configured to disengage from the recess 66R in a state where the torque (e.g., the fourth input torque T41) is equal to or greater than the torque threshold value to transmit the fourth torque T43 between the first member 64 and the second member 66.

The protruding portion 66P is configured to engage in the recess 64R in a state where the torque (e.g., the fourth input torque T41) is less than the torque threshold to transmit the third torque T42 between the first member 64 and the second member 66. The protruding portion 66P is configured to disengage from the recess 64R in a state where the torque (e.g., the fourth input torque T41) is equal to or greater than the torque threshold value to transmit the fourth torque T43 between the first member 64 and the second member 66.

As shown in fig. 15, the protruding portion 64P includes a first inclined surface 64PA and a second inclined surface 64PB. The first and second inclined surfaces 64PA, 64PB at least partially define the recess 64R. The first inclined surface 64PA is not parallel and is not perpendicular to the limiter rotation axis A6. The second inclined surface 64PB is not parallel and is not perpendicular to the limiter rotation axis A6.

The protruding portion 66P includes a first inclined surface 66PA and a second inclined surface 66PB. The first and second inclined surfaces 66PA, 66PB at least partially define the recess 66R. The first inclined surface 66PA is not parallel and is not perpendicular to the limiter rotation axis A6. The second inclined surface 66PB is not parallel and is not perpendicular to the limiter rotation axis A6.

The first inclined surface 64PA may be in contact with the first inclined surface 66 PA. The second inclined surface 64PB may be in contact with the second inclined surface 66PB. The first inclined surface 64PA is in contact with the first inclined surface 66PA in a state where the protruding portion 64P is provided in the recess 66R and the protruding portion 66P is provided in the recess 64R. The second inclined surface 64PB contacts the second inclined surface 66PB in a state where the protruding portion 64P is provided in the recess 66R and the protruding portion 66P is provided in the recess 64R.

As shown in fig. 15, the second member 66 is movable relative to the first member 64 in an axial direction D1 parallel to the limiter rotation axis A6 between a first position P11 and a second position P12. For example, the first position P11 and the second position P12 are defined based on the end of the protruding portion 66P. However, the first and second positions P11 and P12 may be defined based on other portions of the second member 66.

The protruding portion 64P is configured to engage in the recess 66R in a state in which the second member 66 is in the first position P11 relative to the first member 64 to transmit the third torque T42 between the first member 64 and the second member 66. The protruding portion 66P is configured to engage in the recess 64R in a state in which the second member 66 is in the first position P11 relative to the first member 64 to transmit the third torque T42 between the first member 64 and the second member 66. Specifically, the protruding portion 64P is configured to be at least partially disposed between adjacent two of the protruding portions 66P in a state in which the second member 66 is in the first position P11 relative to the first member 64 to transmit the third torque T42 between the first member 64 and the second member 66. The protruding portion 66P is configured to be at least partially disposed between adjacent two of the protruding portions 64P in a state in which the second member 66 is in the first position P11 relative to the first member 64 to transmit the third torque T42 between the first member 64 and the second member 66. More specifically, in a state where the second member 66 is in the first position P11 with respect to the first member 64, the first inclined surface 64PA is in contact with the second inclined surface 66PA to transmit the third torque T42 between the first member 64 and the second member 66. In a state where the second member 66 is in the first position P11 with respect to the first member 64, the first inclined surface 64PB contacts the second inclined surface 66PB to transmit the third torque T42 between the first member 64 and the second member 66.

The protruding portion 64P is provided in the recess 66R in a state where the second member 66 is in the first position P11. The protruding portion 66P is provided in the recess 64R in a state where the second member 66 is in the first position P11. The second member 66 is held in the first position P11 by the biasing force of the biasing member 78 in a state where torque is not input to the first member 64 and the second member 66.

When torque is input to one of the first member 64 and the second member 66, one of the first inclined surface 64PA and the second inclined surface 64PB of the protruding portion 64P guides the protruding portion 66P to the axial end of the protruding portion 64P so that the protruding portion 66P is disengaged from the recess 64R in a state where the torque is equal to or greater than the torque threshold value. That is, when torque is input to one of the first member 64 and the second member 66, one of the first inclined surface 64PA and the second inclined surface 64PB of the protruding portion 64P guides the protruding portion 66P to the axial end of the protruding portion 64P to move the second member 66 from the first position P11 to the second position P12 against the biasing force of the biasing member 78 in a state where the torque is equal to or greater than the torque threshold value.

The protruding portion 66P moves into the recess 66R from the axial end of the protruding portion 64P along one of the first inclined surface 64PA and the second inclined surface 64PB of the protruding portion 64P in a state where the torque is equal to or greater than the torque threshold value, thereby moving the second member 66 from the second position P12 to the first position P11. When one of the first member 64 and the second member 66 receives a torque equal to or greater than the torque threshold, the protruding portion 66P repeatedly disengages and engages with the recess 64R, allowing the first member 64 and the second member 66 to rotate relative to each other about the limiter rotation axis A6.

When the disengagement and engagement between the protruding portion 66P and the recess 64R are repeated, a fourth torque T43 is transmitted between the first member 64 and the second member 66. The fourth torque T43 depends on rotational resistance generated by the protruding portion 64P, the protruding portion 66P, the recess 64R, and the recess 66R when the first member 64 and the second member 66 rotate relative to each other. For example, the fourth torque T43 is substantially zero.

The structure of the torque limiter 60 is not limited to the illustrated embodiment. The torque limiter 60 may have other structures such as a friction torque limiter and a ball clutch.

As shown in fig. 16, the torque limiter 60 is disposed entirely inside the housing 38 of the motor unit 32. The torque limiter 60 is disposed entirely in the interior space 38S of the housing 38. However, the torque limiter 60 may be disposed partially inside the housing 38 of the motor unit 32 if needed and/or desired. The torque limiter 60 may be partially disposed in the interior space 38S of the housing 38 if needed and/or desired.

The transmission 62 has a transmission rotation axis A7. In this embodiment, the limiter rotation axis A6 does not coincide with the transmission structure rotation axis A7. The limiter rotation axis A6 is offset from the transmission rotation axis A7. The limiter rotation axis A6 is parallel to the transmission rotation axis A7. However, the limiter rotation axis A6 may not be parallel to the transmission structure rotation axis A7 if needed and/or desired. The limiter rotation axis A6 may overlap with the transmission structure rotation axis A7 if needed and/or desired.

As shown in fig. 17, the transmission structure 62 includes a first race 80 and a second race 81. The first race 80 is secured to the housing 38. The second race 81 extends along the transmission rotational axis A7. The second race 81 is rotatable relative to the first race 80 about the transmission rotation axis A7. The first race 80 is at least partially disposed radially outward of the second race 81. The second race 81 is at least partially disposed radially inward of the first race 80.

The first race 80 includes an outer race 83 having an annular shape. The second race 81 includes an inner race 81A. The inner race 81A is disposed at least partially radially inward of the outer race 83. The first race 80 includes a bore 80H. The second race 81 extends through the bore 80H along the drive structure rotational axis A7. The second race 81 includes a rod portion 81B. The shaft portion 81B extends from the inner race 81A along the transmission rotation axis A7. The shaft portion 81B extends through the bore 80H of the first race 80 along the transmission rotational axis A7.

The transmission structure 62 includes a first intermediate member 84. The first intermediate member 84 is at least partially disposed between the first race 80 and the second race 81. In this embodiment, the first intermediate member 84 is disposed entirely between the first race 80 and the second race 81. However, the first intermediate member 84 can be partially disposed between the first race 80 and the second race 81 if needed and/or desired.

As shown in fig. 18, the first intermediate element 84 includes a first rotatable member 84A and a second rotatable member 84B. In this embodiment, the first intermediate element 84 includes at least two first rotatable members 84A and at least two second rotatable members 84B. The total number of first rotatable members 84 is six. The total number of second rotatable members 84B is six. The first rotatable member 84A has a columnar shape. The second rotatable member 84B has a columnar shape.

However, the total number of first rotatable members 84A is not limited to six. The total number of second rotatable members 84B is not limited to six. The structure of the first intermediate element 84 is not limited to the first rotatable member 84A and the second rotatable member 84B. One of the first and second rotatable members 84A, 84B may be omitted from the first intermediate element 84 if needed and/or desired. The first rotatable member 84A may have a shape other than a cylindrical shape if needed and/or desired. The second rotatable member 84B may have a shape other than a cylindrical shape if needed and/or desired.

The first rotatable member 84A is at least partially disposed between the first race 80 and the second race 81. The second rotatable member 84B is at least partially disposed between the first race 80 and the second race 81. In this embodiment, the first rotatable member 84A is disposed entirely between the first race 80 and the second race 81. The second rotatable member 84B is disposed entirely between the first race 80 and the second race 81. However, the first rotatable member 84A may be partially disposed between the first race 80 and the second race 81 if needed and/or desired. The second rotatable member 84B may be partially disposed between the first race 80 and the second race 81 if needed and/or desired.

The first rotatable member 84A and the second rotatable member 84B are alternately arranged in the circumferential direction D3 about the transmission structure rotation axis A7. The first rotatable member 84A and the second rotatable member 84B are spaced apart from each other in the circumferential direction D3.

The first race 80 includes an inner peripheral surface 80A. The second race 81 includes at least two contact surfaces 81C. The total number of contact surfaces 81C is six. The contact surface 81C includes a flat surface. However, the total number of contact surfaces 81C is not limited to six. The contact surface 81C may have a shape other than a flat surface if needed and/or desired.

The first rotatable member 84A and the second rotatable member 84B are disposed between the inner peripheral surface 80A of the first race 80 and the contact surface 81C of the second race 81. The first rotatable member 84A and the second rotatable member 84B can be in contact with the inner peripheral surface 80A of the first race 80 and the contact surface 81C of the second race 81.

The first intermediate element 84 includes at least one intermediate member group 84G consisting of a first rotatable member 84A and a second rotatable member 84B. In this embodiment, the first intermediate element 84 includes six intermediate member groups 84G, each of which is composed of a first rotatable member 84A and a second rotatable member 84B. The intermediate member group 84G is at least partially disposed between the inner peripheral surface 80A of the first race 80 and the contact surface 81C of the second race 81. The intermediate member groups 84G are spaced apart from each other in the circumferential direction D3. The intermediate member groups 84G correspond to the contact surfaces 81C of the second races 81, respectively. However, the total number of intermediate member groups 84G made up of the first rotatable member 84A and the second rotatable member 84B is not limited to six.

The transmission structure 62 includes at least one biasing element 85. The biasing element 85 is configured to bias the first and second rotatable members 84A, 84B away from each other. In this embodiment, the transmission structure 62 includes at least two biasing elements 85. The biasing element 85 is disposed between the first and second rotatable members 84A, 84B of the intermediate member set 84G to bias the first and second rotatable members 84A, 84B away from each other. The total number of biasing elements 85 is six. The biasing member 85 includes springs such as coil springs and leaf springs. However, the biasing element 85 may include components other than springs (e.g., resilient components such as rubber) if needed and/or desired. The total number of biasing elements 85 is not limited to six.

The contact surface 81C of the second race 81 includes a first circumferential end 81C1 and a second circumferential end 81C2. The contact surface 81C extends between a first circumferential end 81C1 and a second circumferential end 81C2. The first circumferential end 81C1 is closer to the first rotatable member 84A than the second circumferential end 81C2. The second circumferential end 81C2 is closer to the second rotatable member 84B than the first circumferential end 81C 1.

The first radial distance DS1 is defined radially between the inner peripheral surface 80A of the first race 80 and the first peripheral end 81C1 of the contact surface 81C of the second race 81. A second radial distance DS2 is defined radially between the inner peripheral surface 80A of the first race 80 and the second circumferential end 81C2 of the contact surface 81C of the second race 81. The first rotatable member 84A has a first diameter DM1. The second rotatable member 84B has a second diameter DM2. The first radial distance DS1 is smaller than the first diameter DM1. The second radial distance DS2 is smaller than the second diameter DM2.

The biasing element 85 biases the first rotatable member 84A to maintain the first rotatable member 84A in contact with the inner peripheral surface 80A of the first race 80 and the contact surface 81C of the second race 81 due to the biasing force of the biasing element 85. The biasing element 85 biases the second rotatable member 84B to maintain the second rotatable member 84B in contact with the inner peripheral surface 80A of the first race 80 and the contact surface 81C of the second race 81 due to the biasing force of the biasing element 85.

As shown in fig. 19, the transmission structure 62 includes a second intermediate member 86. The second intermediate member 86 is at least partially disposed between the first race 80 and the second race 81. In this embodiment, the second intermediate member 86 is partially disposed between the first race 80 and the second race 81. However, the second intermediate member 86 may be disposed entirely between the first race 80 and the second race 81.

The second intermediate member 86 is rotatable relative to the first race 80 about the transmission structure rotation axis A7. The second intermediate member 86 includes a shaft 88. The shaft 88 extends along the transmission rotation axis A7. The second race 81 includes a support hole 81H. The shaft 88 is rotatably provided in the support hole 81H.

The second intermediate element 86 includes a coupling member 90. The coupling member 90 is fixed to the shaft 88. The coupling member 90 is a separate member from the shaft 88. However, the coupling member 90 may be provided as a one-piece, unitary member with the shaft 88 if needed and/or desired.

The coupling member 90 includes a base portion 92, at least two intermediate portions 94, and at least two drive portions 96. The base portion 92 is secured to the shaft 88. The base portion 92 extends radially outwardly from the shaft 88. The intermediate portion 94 extends from the base portion 92 along the transmission structure rotation axis A7. The intermediate portion 94 is at least partially disposed between the first race 80 and the second race 81. The second race 81 includes at least two drive holes 81D. The transmission portion 96 is disposed in the transmission hole 81D of the second race 81. The transmission portion 96 is contactable with the second race 81 to transmit rotation between the second race 81 and the second intermediate member 86 about the transmission structure rotation axis A7.

As shown in fig. 18, the total number of intermediate portions 94 is six. The total number of driving portions 96 is six. The total number of the driving holes 81D is six. However, the total number of intermediate portions 94 is not limited to six. The total number of the transmitting portions 96 is not limited to six. The total number of the driving holes 81D is not limited to six.

The intermediate portion 94 is disposed at least partially between adjacent two of the intermediate member groups 84G in the circumferential direction D3. The intermediate portion 94 is disposed at least partially between the first rotatable member 84A of one of the intermediate member groups 84G and the second rotatable member 84B of the other of the intermediate member groups 84G in the circumferential direction D3.

In this embodiment, the base portion 92, the at least two intermediate portions 94 and the at least two drive portions 96 are integrally provided with one another as a one-piece, unitary member. However, if needed and/or desired, at least one of the base portion 92, the at least two intermediate portions 94, and the at least two drive portions 96 may be a separate component from the other of the base portion 92, the at least two intermediate portions 94, and the at least two drive portions 96.

As shown in fig. 20, the second intermediate element 86 is rotatable in the first circumferential direction D21 about the transmission rotation axis A7 relative to the second race 81 from the neutral position P20 to the first rotational position P21. As shown in fig. 21, the second intermediate element 86 is rotatable about the transmission rotation axis A7 in a second circumferential direction D22 different from the first circumferential direction D21 from the neutral position P20 to the second rotation position P22 relative to the second race 81. In this embodiment, the second circumferential direction D22 is a direction opposite to the first circumferential direction D21. However, the second circumferential direction D22 may be a direction different from the opposite direction of the first circumferential direction D21.

As shown in fig. 18, 20 and 21, the transmission portion 96 can be in contact with the inner peripheral surface of the transmission hole 81D. As shown in fig. 18, the transmission portion 96 is spaced apart from the inner peripheral surface of the transmission hole 81D in the initial state in which the second intermediate member 86 is in the neutral position P20. As shown in fig. 20, the transmission portion 96 is in contact with the inner peripheral surface of the transmission hole 81D in the first rotation state in which the second intermediate member 86 is in the first rotation position P21. As shown in fig. 21, the transmission portion 96 is in contact with the inner peripheral surface of the transmission hole 81D in the second rotational state in which the second intermediate member 86 is in the second rotational position P22.

As shown in fig. 18, 20, and 21, the intermediate portion 94 can be in contact with each of the first rotatable member 84A and the second rotatable member 84B. As shown in fig. 18, the intermediate portion 94 is spaced apart from each of the first and second rotatable members 84A, 84B in the initial state in which the second intermediate element 86 is in the neutral position P20. As shown in fig. 20, the intermediate portion 94 is in contact with the first rotatable member 84A in the first rotational state in which the second intermediate element 86 is in the first rotational position P21. As shown in fig. 21, the intermediate portion 94 is in contact with the second rotatable member 84B in the second rotational state in which the second intermediate element 86 is in the second rotational position P22.

As shown in fig. 18, the first intermediate element 84 is configured to limit rotation of the second race 81 relative to the first race 80 in the first circumferential direction D21 relative to the transmission rotational axis A7 when the second race 81 receives a first rotational force F11 having a second input torque T21 in the first circumferential direction D21. The first intermediate element 84 is configured to limit rotation of the second race 81 relative to the first race 80 in the second circumferential direction D22 relative to the transmission rotational axis A7 when the second race 81 receives a second rotational force F12 in the second circumferential direction D22 having a second input torque T21.

The first intermediate member 84 is configured to move toward the first race 80 in response to the first intermediate member 84 being urged in a first circumferential direction D21 by the second race 81 relative to the transmission structure rotation axis A7. The first intermediate member 84 is configured to move toward the first race 80 in response to the first intermediate member 84 being urged by the second race 81 in a second circumferential direction D22 different from the first circumferential direction D21. The first intermediate member 84 is configured to rotate with the first race 80 in a state in which the second race 81 pushes the first intermediate member 84 and the second intermediate member 86 does not push the first intermediate member 84. Because the first race 80 is fixed to the housing 38 of the motor unit 32, the first race 80 and the first intermediate member 84 are stationary relative to the housing 38 (see, for example, fig. 16) in a state in which the second race 81 pushes the first intermediate member 84 and the second intermediate member 86 does not push the first intermediate member 84.

The first rotatable member 84A is configured to limit rotation of the second race 81 relative to the first race 80 in the first circumferential direction D21 relative to the transmission rotational axis A7 when the second race 81 receives the first rotational force F11 in the first circumferential direction D21. The second rotatable member 84B is configured to limit rotation of the second race 81 relative to the first race 80 in the second circumferential direction D22 relative to the transmission rotational axis A7 when the second race 81 receives the second rotational force F12 in the second circumferential direction D22.

As shown in fig. 18, the contact surface 81C of the second race 81 is configured to press the first rotatable member 84A against the inner peripheral surface 80A of the first race 80 when the second race 81 receives the first rotational force F11 in the first circumferential direction D21. When the second race 81 receives the first rotational force F11 in the first circumferential direction D21, the first race 80 and the second race 81 are locked by the first rotatable member 84A. The first rotatable member 84A is configured to limit rotation of the second race 81 relative to the first race 80 in the first circumferential direction D21 about the transmission rotational axis A7 when the second race 81 receives the first rotational force F11 in the first circumferential direction D21. Thus, the first race 80, which is fixed to the housing 38 (see, for example, fig. 16), receives the first rotational force F11 transmitted to the second race 81.

The contact surface 81C of the second race 81 is configured to press the second rotatable member 84B against the inner peripheral surface 80A of the first race 80 when the second race 81 receives the second rotational force F12 in the second circumferential direction D22. When the second race 81 receives the second rotational force F12 in the second circumferential direction D22, the first race 80 and the second race 81 are locked by the second rotatable member 84. The second rotatable member 84B is configured to limit rotation of the second race 81 relative to the first race 80 in the second circumferential direction D22 about the transmission rotational axis A7 when the second race 81 receives the second rotational force F12 in the second circumferential direction D22. Thus, the first race 80, which is fixed to the housing 38 (see, e.g., fig. 16), receives the second rotational force F12 transmitted to the second race 81.

The contact surface 81C of the second race 81 is configured not to press the first rotatable member 84A against the inner peripheral surface 80A of the first race 80 when the second race 81 receives the second rotational force F12 in the second circumferential direction D22. The first rotatable member 84A is configured to not limit rotation of the second race 81 relative to the first race 80 in the second circumferential direction D22 about the transmission rotational axis A7 when the second race 81 receives the second rotational force F12 in the second circumferential direction D22.

The contact surface 81C of the second race 81 is configured not to press the second rotatable member 84B against the inner peripheral surface 80A of the first race 80 when the second race 81 receives the first rotational force F11 in the first circumferential direction D21. The second rotatable member 84B is configured to limit rotation of the second race 81 relative to the first race 80 in the first circumferential direction D21 about the transmission rotational axis A7 when the second race 81 receives the first rotational force F11 in the first circumferential direction D21.

As shown in fig. 20, the first intermediate member 84 is configured to move away from the first race 80 in response to the first intermediate member 84 being pushed by the second intermediate member 86 in the first circumferential direction D21. The first intermediate member 84 is configured to rotate relative to the first race 80 in a state in which the second intermediate member 86 urges the first intermediate member 84 and the second race 81 does not urge the first intermediate member 84. The first intermediate element 84 is configured to move radially inward relative to the transmission rotational axis A7 in response to the first intermediate element 84 being pushed in the first circumferential direction D21 by the second intermediate element 86.

The second intermediate member 86 is configured to move the first intermediate member 84 relative to the second race 81 in the first circumferential direction D21 to allow the second race 81 to rotate with the second intermediate member 86 in the first circumferential direction D21 relative to the first race 80 when the second intermediate member 86 receives the first rotational force F21 in the first circumferential direction D21 having the first input torque T11. The first intermediate element 84 is configured to rotate in the first circumferential direction D21 with the second race 81 and the second intermediate element 86 about the transmission rotation axis A7 relative to the first race 80 when the second intermediate element 86 receives the first rotational force F21 in the first circumferential direction D21.

The intermediate portion 94 of the second intermediate element 86 is configured to move the first rotatable member 84A relative to the second race 81 in the first circumferential direction D21 in response to a first rotation of the second intermediate element 86 in the first circumferential direction D21 from the neutral position P20 to the first rotational position P21. The transmission portion 96 of the second intermediate member 86 is configured to rotate the second race 81 relative to the first race 80 in the first circumferential direction D21 in response to a first rotation of the second intermediate member 86 in the first circumferential direction D21 from the neutral position P20 to the first rotational position P21. When the second intermediate member 86 receives the first rotational force F21 in the first circumferential direction D21 with the first input torque T11, the second race 81, the first intermediate member 84, and the second intermediate member 86 rotate in the first circumferential direction D21 relative to the first race 80.

As shown in fig. 21, the first intermediate element 84 is configured to move away from the first race 80 in response to the first intermediate element 84 being pushed by the second intermediate element 86 in a second circumferential direction D22 different from the first circumferential direction D21. The first intermediate member 84 is configured to rotate relative to the first race 80 in a state in which the second intermediate member 86 urges the first intermediate member 84 and the second race 81 does not urge the first intermediate member 84. The first intermediate element 84 is configured to move radially inward relative to the transmission structure rotation axis A7 in response to the first intermediate element 84 being pushed in the second circumferential direction D22 by the second intermediate element 86.

The second intermediate element 86 is configured to move the first intermediate element 84 relative to the second race 81 in the second circumferential direction D22 to allow the second race 81 to rotate with the second intermediate element 86 in the second circumferential direction D22 relative to the first race 80 when the second intermediate element 86 receives a second rotational force F22 in the second circumferential direction D22 having the first input torque T11. The first intermediate element 84 is configured to rotate in the second circumferential direction D22 with the second race 81 and the second intermediate element 86 about the transmission structure rotation axis A7 relative to the first race 80 when the second intermediate element 86 receives the second rotational force F22 in the second circumferential direction D22.

The intermediate portion 94 of the second intermediate element 86 is configured to move the second rotatable member 84B relative to the second race 81 in the second circumferential direction D22 in response to a second rotation of the second intermediate element 86 in the second circumferential direction D22 from the neutral position P20 to the second rotational position P22. The drive portion 96 of the second intermediate member 86 is configured to rotate the second race 81 relative to the first race 80 in the second circumferential direction D22 in response to a second rotation of the second intermediate member 86 in the second circumferential direction D22 from the neutral position P20 to the second rotational position P22. When the second intermediate element 86 receives the second rotational force F22 in the second circumferential direction D22 with the first input torque T11, the second race 81, the first intermediate element 84, and the second intermediate element 86 rotate relative to the first race 80 in the second circumferential direction D22.

As shown in fig. 8, 20, and 21, the transmission structure 62 is configured to transmit torque in a plurality of rotational directions based on the rotational direction of the output shaft 54A in a state in which the transmission structure 62 transmits torque in the first load direction LD 1. A plurality of rotational directions are defined about the transmission structure rotational axis A7. The plurality of rotational directions includes a first circumferential direction D21 and a second circumferential direction D22. The transmission structure 62 is configured to transmit the first torque T1 in the first circumferential direction D21 based on the first rotational direction D31 of the output shaft 54A in a state in which the transmission structure 62 transmits the first torque T1 in the first load direction LD 1. The transmission structure 62 is configured to transmit the first torque T1 in the second circumferential direction D22 based on the second rotational direction D32 of the output shaft 54A in a state in which the transmission structure 62 transmits the first torque T1 in the first load direction LD 1. The second rotation direction D32 is a direction opposite to the first rotation direction D31.

As shown in fig. 16, the motor unit 32 further includes a detection object 100. The motor unit 32 includes a detector 102 configured to detect the detection object 100. The detection object 100 is configured to be detected by a detector 102. The detector 102 is configured to detect the position of the detection object 100. The detection object 100 is coupled to the support shaft 67 to rotate around the limiter rotation axis A6 together with the support shaft 67. The detector 102 is configured to detect a rotational position of the detection object 100. Thus, the detector 102 is configured to detect the rotational position of the support shaft 67 of the torque limiter 60. The rotational position of the support shaft 67 corresponds to the position of the movable member 14 and the gear position of the derailleur RD. Thus, the detector 102 is configured to detect the position of the movable member 14 and the gear of the derailleur RD.

In this embodiment, the detector 102 comprises a non-contact detector such as an encoder. Examples of encoders include magnetic sensors (e.g., hall sensors) and optical sensors (e.g., light sensors). The detection object 100 includes a magnetic body (e.g., a magnet) and a light emitter (e.g., a Light Emitting Diode (LED)). However, the detector 102 may include a contact detector if needed and/or desired. The detection object 100 may include a portion other than a magnetic body or a light emitter.

As shown in fig. 8, the detection object 100 is disposed on the downstream side with respect to the transmission structure 62 on the power transmission path TP. The detection object 100 is disposed on the downstream side with respect to the torque limiter 60 on the power transmission path TP. The detection object 100 is disposed on the downstream side with respect to the transmission structure 62 on the power transmission path TP in the first load direction LD 1. The detection object 100 is disposed on the downstream side with respect to the torque limiter 60 on the power transmission path TP in the first load direction LD 1.

As shown in fig. 22, the motor unit 32 includes an electronic controller 104, a motor driver 106, a communicator 108, a notification device 110, and an electrical switch SW. The electronic controller 104 is electrically connected to the detector 102, the motor driver 106, the communicator 108, and the notification device 110. The power supply attachment structure 34 is electrically connected to the detector 102, the electronic controller 104, the motor driver 106, the communicator 108, and the notification device 110. The power source 36 is electrically connected to the detector 102, the electronic controller 104, the motor driver 106, the communicator 108, and the notification device 110 via the power supply attachment structure 34 to supply power to the detector 102, the electronic controller 104, the motor driver 106, the communicator 108, and the notification device 110 via the power supply attachment structure 34.

As shown in fig. 22, the electronic controller 104 includes a processor 104P, a memory 104M, a circuit board 104C, and a bus 104D. The processor 104P and the memory 104M are electrically mounted to the circuit board 104C. The processor 104P and the memory 104M are electrically connected to the circuit board 104C via the bus 104D. The processor 104P is electrically connected to the memory 104M via the circuit board 104C and the bus 104D.

For example, the processor 104P includes at least one of a Central Processing Unit (CPU), a Microprocessor (MPU), and a memory controller. The memory 104M is electrically connected to the processor 104P. For example, the memory 104M includes at least one of volatile memory and nonvolatile memory. Examples of volatile memory include Random Access Memory (RAM) and Dynamic Random Access Memory (DRAM). Examples of the nonvolatile memory include Read Only Memory (ROM), electrically erasable programmable memory (EEPROM), and Hard Disk Drive (HDD). The memory 104M includes storage areas, each having an address. The processor 104P is configured to control the memory 104M to store data in the storage area of the memory 104M and to read data from the storage area of the memory 104M. The processor 104P may also be referred to as a hardware processor 104P. The memory 104M may also be referred to as a hardware memory 104M. The memory 104M may also be referred to as a computer-readable storage medium 104M.

The electronic controller 104 is programmed to execute at least one control algorithm of the derailleur RD. The memory 104M (e.g., ROM) stores at least one program including at least one program instruction. The at least one program is read into the processor 104P, and thereby at least one control algorithm of the derailleur RD is executed based on the at least one program. The electronic controller 104 may also be referred to as an electronic controller circuit or circuitry 104. The electronic controller 104 may also be referred to as a hardware electronic controller 104.

The structure of the electronic controller 104 is not limited to the above structure. The structure of the electronic controller 104 is not limited to the processor 104P, the memory 104M, and the bus 104D. The electronic controller 104 may be implemented by hardware alone or by a combination of hardware and software. The processor 104P and the memory 104M may be integrated into one chip, such as an Application Specific Integrated Circuit (ASIC) or a Field Programmable Gate Array (FPGA).

The communicator 108 is configured to communicate with other devices such as the operating devices 3 and 4 and the derailleur FD. Communicator 108 includes a wireless communicator WC. The electronic controller 104 is electrically connected to the wireless communicator WC to control the wireless communicator WC. The electronic controller 104 is configured to control the wireless communicator WC to perform pairing of the wireless communicator WC with the operating devices 3 and 4 and other wireless communicators of the derailleur FD.

The wireless communicator WC is electrically connected to the processor 104P and the memory 104M using the circuit board 104C and the bus 104D. The wireless communicator WC includes signal transmission circuitry or circuitry and signal reception circuitry or circuitry. Thus, the wireless communicator WC may also be referred to as a wireless communicator circuit or circuitry WC.

The wireless communicator WC is configured to superimpose a digital signal on a carrier wave using a predetermined wireless communication protocol to wirelessly transmit the signal. In a first embodiment, the wireless communicator WC is configured to encrypt a signal using a key to produce an encrypted wireless signal. The wireless communicator WC includes at least one antenna. The wireless communicator WC is configured to transmit wireless signals via at least one antenna. The wireless communicator WC may include at least two antennas. In the case where the wireless communicator WC includes at least two antennas, the wireless communicator WC may be configured to wirelessly communicate with another device of the bicycle 2 via one of the at least two antennas and with wireless devices (such as smartphones, tablets, and personal computers) via the other of the at least two antennas.

The wireless communicator WC is configured to receive wireless signals via an antenna. In a first embodiment, the wireless communicator WC is configured to decode the wireless signal to identify signals transmitted from other wireless communicators. The wireless communicator WC is configured to decrypt the wireless signal using the key.

The operating device 3 is configured to generate control signals in response to user input. For example, the operating device 3 comprises a first electrical switch, a first additional electrical switch and a first communicator. The first electrical switch is configured to receive a first user input. The first additional electrical switch is configured to receive a first additional user input. The first communicator is configured to wirelessly transmit the control signal CS11 in response to a first user input received by the first electrical switch. The first communicator is configured to wirelessly transmit the control signal CS12 in response to a first additional user input received by the first additional electrical switch. For example, the control signal CS11 indicates an upshift of the derailleur RD. The control signal CS12 indicates a downshift of the derailleur RD. The operating device 3 may be configured to transmit control signals via a cable if needed and/or desired.

The operating device 4 is configured to generate control signals in response to user input. For example, the operating device 4 comprises a second electrical switch, a second additional electrical switch and a second communicator. The second electrical switch is configured to receive a second user input. The second additional electrical switch is configured to receive a second additional user input. The second communicator is configured to wirelessly transmit the control signal CS21 in response to a second user input received by the second electrical switch. The second communicator is configured to wirelessly transmit the control signal CS22 in response to a second additional user input received by the second additional electrical switch. For example, the control signal CS21 indicates an upshift of the derailleur FD. The control signal CS22 indicates a downshift of the derailleur FD. The operating device 4 may be configured to transmit control signals via a cable if needed and/or desired.

The wireless communicator WC is configured to wirelessly receive the control signals CS11, CS12, CS21, and CS22 transmitted from the operation devices 3 and 4. The electronic controller 104 is configured to receive control signals CS11, CS12, CS21, and CS22 wirelessly transmitted from the operation devices 3 and 4 via the wireless communicator WC. The wireless communicator WC is configured to wirelessly communicate with the wireless communicator of the derailleur FD. The wireless communicator WC is configured to wirelessly transmit the control signals CS21 and CS22 transmitted from the operating device 4 to the derailleur FD. If needed and/or desired, the communicator 108 may include a wired communicator configured to communicate with another wired communicator via a cable.

The motor driver 106 is electrically connected to the electric motor 54 and the electronic controller 104 to control the electric motor 54 based on control signals transmitted from the electronic controller 104. The motor driver 106 is configured to control the power supplied from the power supply 36 based on the control signals CS11 and CS12 transmitted from the electronic controller 104. That is, the electronic controller 104 is configured to control the electric motor 54 based on the control signals CS11 and CS12 transmitted from the operating devices 3 and 4.

The wireless communicator WC has a first mode and a second mode. In the first mode, the power consumption of the wireless communicator WC is a first power consumption. In the second mode, the power consumption of the wireless communicator WC is a second power consumption. The second power consumption is smaller than the first power consumption. For example, in the first mode, the electronic controller 104 controls the signal receiving circuit and the signal transmitting circuit to which power is supplied from the power supply 36 to the wireless communicator WC. In the second mode, the electronic controller 104 controls the power supplied from the power supply 36 to the signal receiving circuit of the wireless communicator WC, not to the signal transmitting circuit of the wireless communicator WC. Thus, in the second mode, the wireless communicator WC is configured to recognize the control signals CS11, CS12, CS21, and CS22 without transmitting the control signals CS21 and CS22.

In the first mode, the electronic controller 104 is configured to control the electric motor 54 to move the movable member 14 in the upshift direction from the current gear to the target gear based on the control signal CS11 received from the operating device 3 via the wireless communicator WC. In the first mode, the electronic controller 104 is configured to control the electric motor 54 to move the movable member 14 in the downshift direction from the current gear to the target gear based on the control signal CS12 received from the operating device 3 via the wireless communicator WC.

In the first mode, the electronic controller 104 is configured to transmit control signals CS21 and CS22 received from the operating device 4 via the wireless communicator WC to the derailleur FD via the wireless communicator WC. In the first mode, the derailleur FD is configured to change the gear of the derailleur FD based on control signals CS21 and CS22 received from the operating device 4 via the wireless communicator WC. However, the derailleur FD can be configured to receive control signals from the operating device 4 if needed and/or desired.

The electronic controller 104 is configured to: if the wireless communicator WC does not recognize any of the control signals CS11, CS12, CS21, and CS22 within the determined time, the mode of the wireless communicator WC is changed from the first mode to the second mode.

The electronic controller 104 is configured to: if the wireless communicator WC recognizes one of the control signals CS11, CS12, CS21 and CS22 in the second mode, the mode of the wireless communicator WC is changed from the second mode to the first mode. For example, the electronic controller 104 is configured to: if the wireless communicator WC receives a wireless signal in the second mode, control power is supplied from the power source 36 to the signal transmission circuit of the wireless communicator WC. The electronic controller 104 may be configured to: if the electronic controller 104 receives a signal from the wake-up sensor within a determined time, the mode of the wireless communicator WC is changed from the second mode to the first mode. The wake-up sensor is configured to detect movement of the bicycle 2. Examples of wake-up sensors include acceleration sensors and vibration sensors. The electronic controller 104 may be configured to: if the electronic controller 104 does not receive a signal from the wake-up sensor within a determined time, the mode of the wireless communicator WC is changed from the first mode to the second mode.

The notification device 110 is configured to notify a user of information about the derailleur RD. The notification device 110 includes an indicator configured to indicate information. For example, the indicator comprises a light emitting diode. The information includes at least one of a state of the derailleur RD, a state of the motor unit 32, a state of the power supply 36, a state of the electric motor 54, a state of the electronic controller 104, and a state of the communicator 108. The notification device 110 may be omitted from the motor unit 32 if needed and/or desired. The notification device 110 may include other devices (such as a speaker) in place of or in addition to the indicators, if needed and/or desired.

The electrical switch SW is configured to receive user input from a user. The electrical switch SW is configured to activate in response to user input. The electrical switch SW is electrically connected to the electronic controller 104. The electronic controller 104 is configured to recognize activation of the electrical switch SW. The user inputs include normal presses, long presses, and double clicks of the electrical switch SW. The electrical switch SW is configured to recognize normal presses, long presses, and double clicks of the electrical switch SW. For example, a normal press indicates a mode change of the derailleur RD, a temporary shift operation of the derailleur RD during maintenance, or a wakeup to the wireless communicator WC. A long press indicates a pairing mode in which the derailleur RD is turned on or off or the wireless communicator WC is paired with another wireless communicator of another device such as the operating devices 3 and 4 and the derailleur FD. The electrical switch SW may be omitted from the motor unit 32 if needed and/or desired.

The electronic controller 104 is electrically connected to the detector 102 to receive the detection result of the detector 102. The electronic controller 104 is configured to monitor the current gear of the derailleur RD based on the detection result of the detector 102. The electronic controller 104 is configured to store the current gear in the memory 104M.

The torque limiter 60 allows the output member 56 to rotate in a state where the external torque ET is equal to or greater than the external torque threshold. Accordingly, the movable member 14 may be unintentionally moved by an external force EF caused by physical contact between the obstacle and at least one of the movable member 14 and the linkage 16. The motor unit 32 is configured to automatically return the movable member 14 to the previous gear, which is the position before the movable member 14 is moved by the external force EF.

The electronic controller 104 is configured to periodically monitor the current gear based on the detection result of the detector 102. The electronic controller 104 is configured to periodically determine whether the movable member 14 is moved from the current gear due to the external force EF based on the detection result of the detector 102. The electronic controller 104 is configured to infer that the movable member 14 is moved from the current gear due to the external force EF in the case where the detection result of the detector 102 indicates that the movable member 14 is moved and the electronic controller 104 does not receive the control signals CS11 and CS12 generated by the operating device 3.

If the electronic controller 104 concludes that the movable member 14 is moved from the current gear due to the external force EF, the electronic controller 104 controls the electric motor 54 to return the movable member 14 to the previous gear. The electronic controller 104 is configured to control the notification device 110 to notify a user that the movable member 14 is moved due to the external force EF.

Second embodiment

The bicycle component or derailleur RD2 in accordance with the second embodiment will be described with reference to FIGS. 23 to 40. The bicycle component or derailleur RD2 has the same structure and/or configuration as the electric component or derailleur RD, except for the motor unit 32. Accordingly, elements having substantially the same function as elements in the first embodiment will be identically numbered herein, and for the sake of brevity will not be described and/or illustrated in detail herein.

As seen in fig. 23 and 24, the derailleur RD2 includes a base member 212, the movable member 14 and a linkage 216. The base member 212 is configured to be coupled to the vehicle body 2A. The movable member 14 is movable relative to the base member 212. The coupling portion 20 is movably coupled to the base member 212 via a linkage 216.

As shown in fig. 23, linkage 216 movably couples base member 212 and movable member 14. The linkage 216 movably couples the base member 212 and the coupling portion 20. In this embodiment, linkage 216 includes an outer link 228 and an inner link 230. The outer link 228 is pivotally coupled to the base member 212 about a first pivot axis a 21. The outer link 228 is pivotally coupled to the movable member 14 about the second pivot axis a 22. The inner link 230 is pivotally coupled to the base member 212 about a third pivot axis a 23. The inner link 230 is pivotally coupled to the movable member 14 about a fourth pivot axis a 24. The first to fourth pivot axes a21 to a24 are parallel to each other. However, one of the outer link 228 and the inner link 230 may be omitted from the linkage 216 if needed and/or desired. The structure of the linkage 216 is not limited to the above structure. At least one of the first to fourth pivot axes a21 to a24 may be non-parallel to the other of the first to fourth pivot axes a21 to a 24.

The derailleur RD2 includes a bumper 231. The bumper 231 is a separate member from the linkage 216. The bumper 231 is a separate member from the outer link 228 and the inner link 230. The bumper 231 is removably and reattachably attached to the linkage 216 with a bumper fastener 231A. The bumper 231 is removably and reattachably attached to the outer link 228 of the linkage 216 with a bumper fastener 231A. A bumper 231 is attached to the outer link 228 to reduce contact between the outer link 228 and the obstacle. However, the bumper 231 can be omitted from the derailleur RD2 if needed and/or desired.

As seen in FIG. 25, the inner link 230 is at least partially disposed between the outer link 228 and the lateral center plane CP of the bicycle 2.

The derailleur RD2 includes a motor unit 232. The motor unit 232 is configured to move at least one of the movable member 14 and the linkage 216 relative to the base member 212. In this embodiment, the motor unit 232 is coupled to the linkage 216 to move the movable member 14 via the linkage 216. The motor unit 232 is configured to generate an actuation force and is coupled to the linkage 216 to transmit the actuation force to the linkage 216. However, if needed and/or desired, the motor unit 232 may be directly coupled to the movable member 14 to move the movable member 14 relative to the base member 212. The motor unit 232 may be configured to transmit the actuation force to the movable member 14 if needed and/or desired.

In the second embodiment, as seen in fig. 23 to 25, the derailleur RD2 does not include a power supply attachment structure to which a power source is to be attached. However, as with the derailleur RD of the first embodiment, the derailleur RD2 can include a power supply attachment structure to which a power source is to be attached, if needed and/or desired.

As shown in fig. 26, the motor unit 232 includes an electrical connector 237 to which the cable EC is to be detachably connected. The motor unit 232 is configured to be electrically connected to the power source PS via an electrical connector 237 and a cable EC. For example, the power source PS is mounted to the vehicle body 2A.

A motor unit 232 is provided at one of the base member 212, the movable member 14, and the linkage 216. A motor unit 232 is disposed at one of the base member 212 and the linkage 216. In this embodiment, the motor unit 232 is disposed at the linkage 216. The motor unit 232 is disposed at the inner link 230. However, the motor unit 232 may be provided at one of the movable member 14 and the linkage 216 if needed and/or desired. The motor unit 232 may be disposed at the outer link 228 of the linkage 216 if needed and/or desired.

As shown in fig. 27, the motor unit 232 includes a housing 238. The housing 238 is a separate component from the base member 212. However, the housing 238 may be at least partially integrally provided as a one-piece, unitary member with the base member 212.

The base member 212 includes a first base body 240, a second base body 242, and a fastener 44. The first base body 240 is configured to be coupled to the vehicle body 2A with a derailleur fastener 46. The second base body 242 is a separate member from the first base body 240. The second base body 242 is fastened to the first base body 240 with fasteners 44, such as bolts. The motor unit 232 is disposed between the first and second base bodies 240 and 242. The housing 238 of the motor unit 232 is disposed between the first and second base bodies 240 and 242.

As shown in fig. 28, the housing 238 includes a first housing 250 and a second housing 252. The housing 238 includes an interior space 238S. The first housing 250 and the second housing 252 define an interior space 238S between the first housing 250 and the second housing 252. For example, the second housing 252 is fixed to the first housing 250 with fasteners. The second housing 252 is a separate member from the first housing 250. However, if needed and/or desired, the second housing 252 may be integrally provided with the first housing 250 as a one-piece, unitary member.

As shown in fig. 27 and 29, the inner link 230 includes a first inner link body 230A, a second inner link body 230B, and a plurality of fasteners 230C. The second inner link body 230B is secured to the first inner link body 230A with a fastener 230C. The motor unit 232 includes a cover 253. The cover 253 is held between the housing 238 and the second inner link body 230B.

As shown in fig. 28 and 29, the motor unit 232 is at least partially disposed between the first and second inner link bodies 230A and 230B. The housing 238 is at least partially disposed between the first inner link body 230A and the second inner link body 230B. In this embodiment, the motor unit 232 is partially disposed between the first and second inner link bodies 230A and 230B. The housing 238 is partially disposed between the first and second inner link bodies 230A, 230B. However, the motor unit 232 may be disposed entirely between the first and second inner link bodies 230A and 230B if needed and/or desired. The housing 238 may be disposed entirely between the first and second inner link bodies 230A, 230B if needed and/or desired.

As shown in fig. 30, the housing 238 includes a positioning protrusion 255. The positioning protrusion 255 protrudes from the first housing 250. The first inner link body 230A includes a locating hole 230H. The positioning protrusion 255 is at least partially disposed in the positioning hole 230H.

As shown in fig. 31, the motor unit 232 for the bicycle component RD2 includes an electric motor 54. The electric motor 54 is configured to generate an actuation force using electric power supplied from a power source PS via a cable EC (see, for example, fig. 26). The electric motor 54 is disposed in an inner space 238S (see, for example, fig. 28) of the housing 238. The electric motor 54 is disposed between the first housing 250 and the second housing 252.

The motor unit 232 for the bicycle component RD2 includes an output member 256. The electric motor 54 is coupled to the output member 256 to rotate the output member 256 relative to the housing 238 about the output rotation axis a 25. The output member 256 extends along an output rotation axis a 25.

As shown in fig. 28, the output member 256 includes a first end 256A and a second end 256B. The output member 256 extends along an output rotational axis a25 between a first end 256A and a second end 256B. The base member 212 includes a first support hole 212A and a second support hole 212B. The first end 256A is disposed in the first support aperture 212A. The second end 256B is disposed in the second support hole 212B. The output member 256 is rotatable relative to the base member 212 about an output rotation axis a 25.

The inner link 230 includes a first aperture 230D and a second aperture 230E. The first inner link body 230A includes a first bore 230D. The second inner link body 230B includes a second bore 230E. The output member 256 extends through the first aperture 230D and the second aperture 230E. The inner link 230 is rotatably supported by the output member 256 about an output rotational axis a 25. Thus, the output rotation axis a25 coincides with the third pivot axis a 23. The output member 256 is rotatable relative to the housing 238 about the third pivot axis a 23. However, the output rotation axis a25 may be offset from the third pivot axis a23 if needed and/or desired.

As shown in fig. 30, the output member 256 is spaced apart from the positioning protrusion 255 of the housing 238. The positioning protrusion 255 is coupled to the housing 238 to limit rotation of the housing 238 relative to the inner link 230 about the output rotation axis a 25. Thus, the housing 238 is integrally provided as a single unit with the inner link 230. As shown in fig. 25, the inner link 230 and the motor unit 232 are movable together relative to the base member 212 and the movable member 14. The inner link 230 and the motor unit 232 are pivotable together about a third pivot axis a23 relative to the base member 212. The inner link 230 and the motor unit 232 are pivotable together about the fourth pivot axis a24 relative to the movable member 14.

As shown in fig. 31, the motor unit 32 includes a coupling arm 257. The coupling arm 257 is coupled to the output member 256 for rotation with the output member 256 about the output rotation axis a25 relative to the housing 238. The linkage arm 257 includes a first arm end 257A and a second arm end 257B. The coupling arm 257 extends between a first arm end 257A and a second arm end 257B. The first arm end 257A is coupled to the output member 256.

As shown in fig. 32, the first arm end 257A includes a splined bore 257C. The output member 256 includes a splined portion 256C. The splined portion 256C of the output member 256 engages the splined aperture 257C of the first arm end 257A. The splined portion 256C is secured to the splined hole 257C using a fastening structure, such as a press fit and adhesive. Thus, the coupling arm 257 is secured to the output member 256 via the splined portion 256C and the splined aperture 257C. The coupling arm 257 is coupled to the output member 256 for rotation with the output member 256 about the output rotation axis a25 relative to the inner link 230 and the housing 238.

As shown in fig. 29 and 30, the output member 256 rotates relative to the housing 238 about the output rotation axis a25 in response to an actuation force generated by the motor unit 232. Accordingly, the coupling arm 257 rotates relative to the housing 238 about the output rotation axis a25 in response to the actuation force generated by the motor unit 232.

As shown in fig. 31, the second arm end 257B includes a coupling hole 257D. As shown in fig. 27, the second arm end 257B is coupled to the first base body 240 of the base member 212. The first base body 240 is partially disposed in the coupling aperture 257D of the second arm end 257B. As shown in fig. 28, the first arm end 257A is coupled to the base member 212 via the output member 256. Thus, the coupling arm 257 is coupled to the base member 212 to be stationary relative to the base member 212. The inner link 230 and the motor unit 232 pivot relative to the base member 212 about the third pivot axis a23 in response to an actuation force generated by the motor unit 232.

As shown in fig. 27, the external force EF is applied to at least one of the movable member 14 and the linkage 216 in response to physical contact between the obstacle and the at least one of the movable member 14 and the linkage 216. Accordingly, an external rotational force ERF having an external torque ET is applied to the output member 256 via the linkage 216 in response to the external force EF. It is preferable to limit the transmission of the external torque ET from at least one of the movable member 14 and the linkage 216 to the electric motor 54 (see, e.g., fig. 31).

As shown in fig. 31, the motor unit 232 for the bicycle component RD2 includes a torque limiter 260 and a transmission structure 62. The torque limiter 260 is configured to protect the electric motor 54 from damage caused by the external force EF while allowing the necessary force to be transmitted from the electric motor 54 to at least one of the movable member 14 and the linkage 216. The transmission structure 62 is configured to protect the electric motor 54 from damage caused by the external force EF while allowing the actuation force generated by the electric motor 54 to be transmitted to at least one of the movable member 14 and the linkage 216. The structure of the torque limiter 260 is different from the structure of the transmission structure 62.

The torque limiter 260 and the transmission structure 62 are disposed between the electric motor 54 and the output member 256 on a power transmission path TP2 provided from the electric motor 54 to the output member 256. The transmission structure 62 is provided between the electric motor 54 and the torque limiter 260 on a power transmission path TP2 provided from the electric motor 54 to the output member 256. The torque limiter 260 is disposed between the transmission structure 62 and the output member 256 on the power transmission path TP 2. A power transmission path TP2 is defined from the electric motor 54 to the output member 256 through the transmission structure 62 and the torque limiter 260.

The torque limiter 260 and the transmission structure 62 are configured to transmit an actuation force generated by the electric motor 54 to at least one of the movable member 14 and the linkage 216. For example, the torque limiter 260 is configured to transmit an actuation force to the movable member 14 via the linkage 216 in a normal state in which the movable member 14 is movable in response to the actuation force transmitted via the torque limiter 260. However, the torque limiter 260 is configured to limit transmission of the actuation force to the movable member 14 via the linkage 216 in an abnormal state in which at least one of the movable member 14 and the linkage 216 is stuck due to foreign matter. The torque limiter 260 is configured to block the actuation force during an abnormal condition. The torque limiter 260 is configured to limit the transmission of force from one of the movable member 14 and the linkage 216 to the transmission structure 62. The transmission structure 62 is configured to limit the transmission of force from the torque limiter 260 to the electric motor 54.

The motor unit 232 further includes a decelerator 263. The decelerator 263 couples the electric motor 54 and the output member 256 to transmit the output torque T0 of the electric motor 54 to the output member 256. The decelerator 263 has substantially the same structure as that of the decelerator 63.

In this embodiment, the speed reducer 263 includes a torque limiter 260 and a transmission structure 62. However, one of the torque limiter 260 and the transmission 62 may be omitted from the speed reducer 263 if needed and/or desired. The speed reducer 263 may include structures other than the torque limiter 260 and the transmission structure 62 in addition to the torque limiter 260 and the transmission structure 62, if needed and/or desired.

As shown in fig. 31, the electric motor 54 is coupled to a transmission structure 62. The electric motor 54 is coupled to the transmission structure 62 via at least one gear. The decelerator 263 includes gears G1, G2, G3, G4, and G5. That is, the motor unit 232 includes gears G1 to G5.

The transmission 62 is coupled to a torque limiter 260. The transmission structure 62 is coupled to the torque limiter 260 via at least one gear. The decelerator 263 includes gears G6, G27, G28, and G29. That is, the motor unit 232 further includes a gear G29. The transmission structure 62 is coupled to the torque limiter 260 via gears G6, G27, G28 and G29. Gear G6 is coupled to drive structure 62 to receive rotational force from drive structure 62. Gear G27 meshes with gear G6. Gear G28 is rotatable with gear G27. Gear G28 meshes with gear G29. Gear G29 is coupled to torque limiter 260 to transmit rotational force between torque limiter 260 and gear G29.

As shown in fig. 31, the transmission structure 62 is configured to transmit a first torque T1 in a first load direction LD1 defined from the electric motor 54 to the output member 256. The transmission structure 62 is configured to transmit a first torque T1 in a first load direction LD1 defined from the output shaft 54A to the output member 256. The transmission structure 62 is configured to transmit the first torque T1 to the torque limiter 260 in a state where the first input torque T11 is applied to the transmission structure 62 from a device other than the torque limiter 260.

The transmission structure 62 is configured to receive a first input torque T11 from the electric motor 54 via the gear G5 in the first load direction LD 1. The transmission structure 62 is configured to transmit a first torque T1 to the gear G6 in the first load direction LD 1.

The transmission structure 62 is configured to transmit a second torque T2 in a second load direction LD2 defined from the output member 256 to the electric motor 54. The transmission structure 62 is configured to transmit a second torque T2 in a second load direction LD2 defined from the output member 256 to the output shaft 54A. The transmission structure 62 is configured to transmit the second torque T2 in a state where the second input torque T21 is applied from the torque limiter 260 to the transmission structure 62.

The transmission structure 62 is configured to receive a second input torque T21 from the torque limiter 260 via the gear G6 in the second load direction LD 2. The transmission structure 62 is configured to transmit the second torque T2 to the gear G5 in the second load direction LD 2.

In this embodiment, the second torque T2 is smaller than the second input torque T12. The second torque T2 may include zero. The second torque T2 may be zero. The transmission structure 62 is configured to reduce the second input torque T21 to a second torque T2 in the second load direction LD 2. The transmission structure 62 is configured to limit transmission of the second input torque T21 to the gear G5 via the transmission structure 62 in the second load direction LD 2. However, the second torque T2 may be greater than zero if needed and/or desired.

The torque limiter 260 is configured to receive the third input torque T31 from the gear G29 in the first load direction LD 1. The torque limiter 260 is configured to transmit the third output torque T32 or the limited output torque T33 to the gear G28 in the first load direction LD 1.

The torque limiter 260 is configured to transmit a third output torque T32 equal to the third input torque T31 to the gear G28 in the first load direction LD1 in a state where the third input torque T31 is smaller than the torque threshold. The torque limiter 260 is configured to transmit a limited output torque T33 smaller than the third input torque T31 to the gear G28 in the first load direction LD1 in a state where the third input torque T31 is equal to or larger than the torque threshold. The torque limiter 260 is configured to reduce the third input torque T31 to the limited output torque T33 in a state where the third input torque T31 is equal to or greater than the torque threshold value.

The torque limiter 260 is configured to receive the third input torque T31 from the electric motor 54 via the transmission structure 62 and gears G1 to G6, G27, G28 and G29. The torque threshold is greater than the maximum possible value of the third input torque T31. Thus, the torque limiter 260 is configured to transmit the output torque T33 to the gear G28 when the torque limiter 260 receives the third input torque T31 from the electric motor 54 via the transmission structure 62 and the gears G1 to G6, G27, G28 and G29.

The torque limiter 260 is configured to receive the fourth input torque T41 from the gear G28 in the second load direction LD 2. The torque limiter 260 is configured to transmit the fourth output torque T42 or the limited output torque T43 to the gear G29 in the second load direction LD 2.

As shown in fig. 31, the torque limiter 260 is configured to transmit a fourth output torque T42 equal to the fourth input torque T41 to the gear G29 in the second load direction LD2 in a state where the fourth input torque T41 is smaller than the torque threshold value. The torque limiter 260 is configured to transmit a limited output torque T43 smaller than the fourth input torque T41 to the gear G29 in the second load direction LD2 in a state where the fourth input torque T41 is equal to or larger than the torque threshold value. The torque limiter 260 is configured to reduce the fourth input torque T41 to the limited output torque T43 in a state where the fourth input torque T41 is equal to or greater than the torque threshold value.

When the external torque ET is applied to the output member 256 from at least one of the movable member 14 and the linkage 216, a fourth input torque T41 is applied to the torque limiter 260 from the output member 256.

The torque limiter 260 is configured to transmit the third torque T42 in a state where the torque input to the torque limiter 260 is less than the torque threshold. The torque limiter 260 is configured to transmit the third torque T42 in the second load direction LD2 in a state where the fourth input torque T41 is smaller than the torque threshold. The torque limiter 260 is configured to transmit the fourth torque T43 in a state where the torque input to the torque limiter 260 is equal to or greater than the torque threshold value. The torque limiter 260 is configured to transmit the fourth torque T43 in the second load direction LD2 in a state where the fourth input torque T41 is equal to or greater than the torque threshold value. In other words, the torque limiter 260 is configured to transmit the third torque T42 in the second load direction LD2 in a state where the external torque ET is smaller than the external torque threshold. The torque limiter 260 is configured to transmit the fourth torque T43 in the second load direction LD2 in a state where the external torque ET is equal to or greater than the external torque threshold. The external torque threshold is a criterion for determining the external torque ET applied to the output member 256, and the torque threshold is a criterion for determining the fourth input torque T41 applied to the torque limiter 260.

As shown in fig. 31, the torque limiter 260 includes a first member 264 and a second member 266. The first member 264 has a structure substantially identical to that of the first member 64 of the torque limiter 60 described in the first embodiment. The second member 266 has a structure substantially identical to that of the second member 66 of the torque limiter 60 described in the first embodiment.

The first member 264 and the second member 266 are movable relative to each other in a state where the torque applied to the torque limiter 260 is equal to or greater than a torque threshold. The first member 264 and the second member 266 are movable with each other in a state where the torque is less than the torque threshold. The first and second members 264, 266 contact each other to transmit the third torque T42 between the first and second members 264, 266 in a state where the torque is less than the torque threshold. The first and second members 264, 266 are configured to transmit a fourth torque T43 between the first and second members 264, 266 in a state where the torque is equal to or greater than the torque threshold.

The first and second members 264, 266 are slidably in contact with each other to transmit a third torque T42 between the first and second members 264, 266 in a state where the torque is less than a torque threshold. The first member 264 and the second member 266 are movable relative to each other in a state where the third input torque T31 applied to the first member 264 is equal to or greater than the torque threshold. The first member 264 is movable relative to the second member 266 in a state where the third input torque T31 applied to the first member 264 is equal to or greater than the torque threshold. The first member 264 and the second member 266 are movable with each other in a state where the third input torque T31 is less than the torque threshold.

The first member 264 and the second member 266 are movable relative to each other in a state where the fourth input torque T41 applied to the torque limiter 260 is equal to or greater than the torque threshold. The second member 266 is movable relative to the first member 264 in a state where a fourth input torque T41 applied to the second member 266 is equal to or greater than a torque threshold. The first member 264 and the second member 266 are movable with each other in a state where the fourth input torque T41 is less than the torque threshold.

Gear G29 is secured to first member 264 to transmit torque from transmission structure 62 to first member 264. In this embodiment, the gear G29 is integrally provided with the first member 264 as a one-piece, unitary member. However, gear G29 may be a separate component from first component 264 if needed and/or desired.

The second member 266 is configured to transmit the third torque T42 to the first member 264 in a second load direction LD2 defined from the output member 256 to the electric motor 54 in a state where the external torque ET input to the output member 256 is less than the external torque threshold. The second member 266 is configured to transmit the fourth torque T43 to the first member 264 in the second load direction LD2 in a state where the external torque ET is equal to or greater than the external torque threshold value.

The first member 264 slidably contacts the second member 266 to transfer the third torque T42 between the first member 264 and the second member 266 in a state where the external torque ET input to the output member 256 is less than the external torque threshold. The first member 264 slidably contacts the second member 266 to transmit the fourth torque T43 between the first member 264 and the second member 266 in a state where the external torque ET is equal to or greater than the external torque threshold.

The torque limiter 260 has a limiter rotation axis a26. The first member 264 is rotatable relative to the housing 238 (see, e.g., fig. 28) about the limiter rotation axis a26. The second member 266 is rotatable relative to the housing 238 (see, e.g., fig. 28) about the limiter rotation axis a26. The first member 264 and the second member 266 are rotatable relative to each other about the limiter rotation axis a26 in a state where the torque applied to the torque limiter 260 is equal to or greater than the torque threshold. The first member 264 and the second member 266 are rotatable with each other about the limiter rotation axis a26 in a state where the torque applied to the torque limiter 260 is less than the torque threshold.

In this embodiment, the limiter rotation axis a26 coincides with the output rotation axis a25 and the third pivot axis a 23. However, the limiter rotation axis a26 may be offset from at least one of the output rotation axis a25 and the third pivot axis a23 if needed and/or desired.

As shown in fig. 32, the torque limiter 260 includes a guide member 276. The guide member 276 is coupled to the output member 256 to guide the second member 266 along the limiter rotation axis a 26. The guide member 276 is coupled to the output member 256 for rotation with the output member 256 about the limiter rotation axis a 26. The guide member 276 is movably supported by the output member 256.

The output member 256 includes a splined portion 256D. The guide member 276 includes a splined bore 276A. The splined portion 256D of the output member 256 engages the splined bore 276A of the guide member 276. The splined portion 256D is secured to the splined bore 276A using a fastening structure such as a press fit and adhesive. Thus, the guide member 276 is secured to the output member 256 via the splined portion 267D and splined aperture 276A. The guide member 276 is secured to the output member 256 with a fastening structure such as a press fit and an adhesive. The guide member 276 is coupled to the output member 256 for rotation with the output member 256 about the limiter rotation axis a 26.

The guide member 276 includes a guide base 276B and at least one first guide portion 276G. The guide base 276B includes a splined hole 276A. The guide base 276B has an annular shape. In this embodiment, the guide member 276 includes at least two first guide portions 276G. The first guide portion 276G extends from the guide base 276B along the limiter rotation axis a 26. At least two first guide portions 276G are circumferentially spaced from each other about the limiter rotation axis a 26.

The second member 266 includes a base portion 266A and a second guide portion 266G. The base portion 266A has an annular shape. In this embodiment, the second member 266 includes at least two second guide portions 266G. The second guide portion 266G extends from the base portion 266A along the limiter rotation axis a 26. At least two second guide portions 266G are circumferentially spaced from each other about the limiter rotation axis a 26.

In this embodiment, the total number of the first guide portions 276G is three. The total number of second guide portions 266G is three. However, the total number of the first guide portions 276G is not limited to three. The total number of the second guide portions 266G is not limited to three.

As shown in fig. 33, at least two second guide portions 266G are engaged with at least two first guide portions 276G. The second guide portion 266G is circumferentially disposed between adjacent ones of the at least two first guide portions 276G. The first guide portion 276G is circumferentially disposed between adjacent ones of the at least two second guide portions 266G. Thus, the second member 266 is movable relative to the output member 256 and the guide member 276 along the limiter rotation axis a26 without rotating relative to the output member 256.

The torque limiter 260 includes a biasing member 78. The biasing member 78 is configured to bias at least one of the first member 264 and the second member 266 to maintain a contact state between the first member 264 and the second member 266. The biasing member 78 is configured to bias at least one of the first member 264 and the second member 266 to maintain a slidable contact between the first member 264 and the second member 266. The biasing member 78 is disposed between the second member 266 and the guide member 276. The biasing member 78 is disposed between the base portion 266A and the guide base 276B. The first guide portion 276G and the second guide portion 266G are disposed in the biasing member 78.

In this embodiment, the biasing member 78 comprises a helical wave spring. However, the biasing member 78 may include other members, such as disc springs, coil springs, and resilient members (e.g., rubber), instead of or in addition to coil wave springs, if needed and/or desired. In fig. 31-33, the biasing member 78 is depicted in a simplified manner.

As shown in fig. 32, the motor unit 232 includes an adjustment member 279, a first intermediate member 281, and a second intermediate member 283. The adjustment member 279 is rotatably coupled to the output member 256. The adjustment member 279 is coupled to the output member 256 to change the distance between the adjustment member 279 and the second member 266 in response to rotation of the adjustment member 279 relative to the output member 256 about the limiter rotation axis a 26. The adjustment member 279 includes a threaded hole 279A. The output member 256 includes an externally threaded portion 256E. The externally threaded portion 256E is threadably engaged with the threaded bore 279A. The externally threaded portion 256E and the threaded bore 279A are configured to translate rotation of the adjustment member 279 into axial movement of the adjustment member 279 along the limiter rotational axis a 26. The biasing member 78 is disposed between the adjustment member 279 and the second member 266. Accordingly, the adjustment member 279 is configured to change the biasing force applied to the second member 266 from the biasing member 78.

The first intermediate member 281 is disposed between the adjustment member 279 and the biasing member 78. The first intermediate member 281 is movably coupled to the output member 256 along a limiter rotation axis a 26. The first intermediate member 281 contacts the adjustment member 279 to apply rotational resistance to the adjustment member 279. The adjustment member 279 includes a first friction portion 279B. The first intermediate member 281 includes a second friction portion 281B. The second friction portion 281B slidably contacts the first friction portion 279B. The first friction portion 279B has a ring shape. The second friction portion 281B has an annular shape. For example, the first friction portion 279B includes at least two recesses. The second friction portion 281B includes at least two protrusions. The at least two recesses of the first friction portion 279B and the at least two protrusions of the second friction portion 281B are configured to generate a rotational resistance between the adjustment member 279 and the first intermediate member 281 and to position the adjustment member 279 in one of at least two rotational positions relative to the first intermediate member 281.

The first intermediate member 281 includes at least two restricting portions 281C. At least two restricting portions 281C extend from the second friction portion 281B toward the guide member 276. The guide base 276B includes at least two restraining recesses 276C. The restricting portion 281C is provided in the restricting recess 276C to restrict rotation of the first intermediate member 281 relative to the guide member 276 about the restrictor rotation axis a26 while allowing the first intermediate member 281 to move relative to the guide member 276 along the restrictor rotation axis a 26.

The second intermediate member 283 has a ring shape. The second intermediate member 283 is disposed between the biasing member 78 and the second member 266.

As shown in fig. 33, the second intermediate member 283 is disposed between the biasing member 78 and the second guide portion 266G. The second intermediate member 283 contacts the second guide portion 266G. The biasing force of the biasing member 78 is applied to the second member 266 via the second intermediate member 283.

As shown in fig. 34, the second intermediate member 283 is spaced apart from the first guide portion 276G of the guide member 276 in a state in which the second intermediate member 283 contacts the second guide portion 266G of the second member 266. Accordingly, the biasing force of the biasing member 78 is applied to the second member 266 via the second intermediate member 283 rather than to the guide member 276.

As shown in fig. 35, the biasing member 78 is configured to bias the second member 266 toward the first member 264 to maintain a contact state between the first member 264 and the second member 266. The biasing member 78 is configured to bias the second member 266 toward the first member 264 to maintain a slidable contact between the first member 264 and the second member 266.

However, if needed and/or desired, the biasing member 78 may be configured to bias the first member 264 toward the second member 266 to maintain the contact state between the first member 264 and the second member 266. If needed and/or desired, the biasing member 78 may be configured to bias the first and second members 264, 266 toward one another to maintain a contact state between the first and second members 264, 266. If needed and/or desired, the biasing member 78 can be configured to bias the first member 264 toward the second member 266 to maintain a slidable contact state between the first member 264 and the second member 266. If needed and/or desired, the biasing member 78 can be configured to bias the first and second members 264, 266 toward one another to maintain a slidable contact state between the first and second members 264, 266.

As shown in fig. 36 and 37, one of the first member 264 and the second member 266 includes a recess. The other of the first member 264 and the second member 266 includes a protruding portion. In this embodiment, the first member 264 includes a recess 264R. The second member 266 includes a recess 266R. The base portion 266A of the second member 266 includes a recess 266R. The first member 264 includes a protruding portion 264P. The second member 66 includes a projection 266P. The base portion 266A of the second member 266 includes a projection 266P.

More specifically, the first member 264 includes at least two recesses 264R. The second member 266 includes at least two recesses 266R. The base portion 266A of the second member 266 includes at least two recesses 266R. The first member 264 includes at least two protruding portions 264P. The second member 66 includes at least two protruding portions 266P. The base portion 266A of the second member 266 includes at least two protruding portions 266P. The recess 264R is disposed between adjacent two of the at least two protruding portions 264P. The recess 266R is disposed between adjacent ones of the at least two projections 266P. However, only one of the first and second members 264, 266 may include a recess if needed and/or desired. Only the other of the first and second members 264, 266 may include a protruding portion if needed and/or desired.

As shown in fig. 33, the protruding portion 264P is configured to engage in the recess 266R in a state in which the torque (e.g., the fourth input torque T41) is less than the torque threshold to transmit the third torque T42 between the first member 264 and the second member 266. The protruding portion 264P is configured to disengage from the recess 266R in a state where the torque (e.g., the fourth input torque T41) is equal to or greater than the torque threshold to transmit the fourth torque T43 between the first member 264 and the second member 266.

The protruding portion 266P is configured to engage in the recess 264R in a state where the torque (e.g., the fourth input torque T41) is less than the torque threshold to transmit the third torque T42 between the first and second members 264, 266. The protruding portion 266P is configured to disengage from the recess 264R in a state where the torque (e.g., the fourth input torque T41) is equal to or greater than the torque threshold value to transmit the fourth torque T43 between the first member 264 and the second member 266.

As shown in fig. 38, the protruding portion 264P includes a first inclined surface 264PA and a second inclined surface 264PB. The first inclined surface 264PA and the second inclined surface 264PB at least partially define the recess 264R. The first inclined surface 264PA is not parallel and is not perpendicular to the limiter rotation axis a26. The second inclined surface 264PB is not parallel and is not perpendicular to the limiter rotation axis a26.

The protruding portion 266P includes a first inclined surface 266PA and a second inclined surface 266PB. The first inclined surface 266PA and the second inclined surface 266PB at least partially define the recess 266R. The first inclined surface 266PA is not parallel and is not perpendicular to the limiter rotation axis a26. The second inclined surface 266PB is not parallel and is not perpendicular to the limiter rotation axis a26.

The first inclined surface 264PA can contact the first inclined surface 266 PA. The second inclined surface 264PB can be in contact with the second inclined surface 266PB. The first inclined surface 264PA is in contact with the first inclined surface 266PA in a state where the protruding portion 264P is provided in the recess 266R and the protruding portion 266P is provided in the recess 264R. The second inclined surface 264PB contacts the second inclined surface 266PB in a state where the protruding portion 264P is provided in the recess 266R and the protruding portion 266P is provided in the recess 264R.

As shown in fig. 38, the second member 266 is movable relative to the first member 264 between a first position P11 and a second position P12 in an axial direction D1 parallel to the limiter rotation axis a26. The protruding portion 264P is configured to engage in the recess 266R in a state in which the second member 266 is in the first position P11 relative to the first member 264 to transmit the third torque T42 between the first member 264 and the second member 266. The protruding portion 266P is configured to engage in the recess 264R in a state in which the second member 266 is in the first position P11 relative to the first member 264 to transmit the third torque T42 between the first member 264 and the second member 266.

The protruding portion 264P is provided in the recess 266R in a state where the second member 66 is in the first position P11. The protruding portion 266P is provided in the recess 264R in a state where the second member 266 is in the first position P11. The second member 266 is held in the first position P11 by the biasing force of the biasing member 78 in a state where torque is not input to the first member 264 and the second member 266.

When torque is input to one of the first and second members 264 and 266, one of the first and second inclined surfaces 264PA and 264PB of the protruding portion 264P guides the protruding portion 266P to the axial end of the protruding portion 264P to disengage the protruding portion 266P from the recess 264R in a state where the torque is equal to or greater than the torque threshold. That is, when torque is input to one of the first member 264 and the second member 266, one of the first inclined surface 264PA and the second inclined surface 264PB of the protruding portion 264P guides the protruding portion 266P to the axial end of the protruding portion 264P to move the second member 266 from the first position P11 to the second position P12 against the biasing force of the biasing member 78 in a state where the torque is equal to or greater than the torque threshold value.

The protruding portion 266P moves into the recess 266R from the axial end of the protruding portion 264P along one of the first inclined surface 264PA and the second inclined surface 264PB of the protruding portion 264P in a state where the torque is equal to or greater than the torque threshold value, thereby moving the second member 266 from the second position P12 to the first position P11. When one of the first and second members 264, 266 receives a torque equal to or greater than the torque threshold, the projection 266P repeatedly disengages and engages the recess 264R, allowing the first and second members 264, 266 to rotate relative to each other about the limiter rotation axis a 26.

As the disengagement and engagement between the protruding portion 266P and the recessed portion 264R are repeated, a fourth torque T43 is transmitted between the first member 264 and the second member 266. The fourth torque T43 depends on rotational resistance generated by the protruding portion 264P, the protruding portion 266P, the recess 264R, and the recess 266R when the first member 264 and the second member 266 are rotated relative to each other. For example, the fourth torque T43 is substantially zero.

The structure of the torque limiter 260 is not limited to the illustrated embodiment. The torque limiter 260 may have other structures such as a friction torque limiter and a ball clutch.

As shown in fig. 28, the torque limiter 260 is disposed entirely inside the housing 238 of the motor unit 232. The torque limiter 260 is disposed entirely in the inner space 238S of the housing 238. However, the torque limiter 260 may be partially disposed inside the housing 238 of the motor unit 232 if needed and/or desired. The torque limiter 260 may be partially disposed in the interior space 238S of the housing 238 if needed and/or desired.

The transmission structure 62 is disposed entirely within the housing 238 of the motor unit 232. The transmission structure 62 is disposed entirely within the interior space 238S of the housing 238. However, the transmission structure 62 may be disposed partially within the housing 238 of the motor unit 232, if needed and/or desired. The transmission structure 62 may be partially disposed within the interior space 238S of the housing 238 if needed and/or desired.

The transmission structure 62 of the motor unit 232 is the same as the transmission structure 62 of the motor unit 32 described in the first embodiment. Accordingly, for the sake of brevity, detailed descriptions and illustrations will not be provided herein.

As shown in fig. 39, the motor unit 232 further includes a detection object 100. The motor unit 232 includes a detector 102 configured to detect the detection object 100. The detection object 100 is configured to be detected by a detector 102. The detection object 100 is coupled to the gears G27 and G28 to rotate around the rotation axis a28 together with the gears G27 and G28. The detector 102 is configured to detect the rotational positions of the gears G27 and G28. Gear G28 meshes with gear G29, which is coupled to first member 264. Thus, the detector 102 is configured to detect the rotational position of the output member 256 via the torque limiter 260. The rotational position of the output member 256 corresponds to the position of the linkage 216. Thus, the detector 102 is configured to detect the position of the linkage 216.

As shown in fig. 31, the detection object 100 is disposed on the upstream side with respect to the torque limiter 260 on the power transmission path TP 2. The detection object 100 is disposed on the upstream side with respect to the torque limiter 260 in the first load direction LD1 on the power transmission path TP 2. However, if needed and/or desired, the detection object 100 can be disposed on the downstream side with respect to the torque limiter 260 on the power transmission path TP2 as with the motor unit 32 of the first embodiment.

As shown in fig. 40, the motor unit 232 includes an electronic controller 104, a motor driver 106, a communicator 108, a notification device 110, and an electrical switch SW. In the motor unit 232, the detection result of the detector 102 indicates the current position of the first member 264. However, since the detection object 100 is disposed on the upstream side with respect to the torque limiter 260 on the power transmission path TP, the detection result of the detector 102 does not indicate the current position of the movable member 14 after the second member 266 slides together with the first member 264. Therefore, the return control of the motor unit 32 to automatically return the movable member 14 to the previous gear, which is the position before the movable member 14 is moved by the external force EF, may be omitted from the control of the electronic controller 104.

Communicator 108 includes a wired communicator WD. The wired communicator WD is configured to communicate with another wired communicator of another device, such as a derailleur FD, via a wired communication structure WS that includes a cable EC. The wired communicator WD is electrically connected to the electronic controller 104. The motor unit 232 is electrically connected to a power source PS and a derailleur FD via a wired communication structure WS. The derailleurs RD2 and FD are powered by a power source PS.

The wired communicator WD is configured to communicate with another wired communicator of another device via the wired communication structure WS using a Power Line Communication (PLC) technology. More specifically, the wired communication structure WS includes a ground line and a voltage line detachably connected to a serial bus formed of a plurality of communication interfaces. In this embodiment, the wired communicator WD is configured to communicate with the derailleur FD via a voltage line using PLC technology. Since PLC technology is known, it will not be described in detail here for the sake of brevity.

If the wireless communicator WC receives the control signal CS21 wirelessly from the operating device 4, the electronic controller 104 is configured to control the wired communicator WD to transmit the control signal CS21 to the derailleur FD via the wired communication structure WS. If the wireless communicator WC receives the control signal CS22 wirelessly from the operating device 4, the electronic controller 104 is configured to control the wired communicator WD to transmit the control signal CS22 to the derailleur FD via the wired communication structure WS.

Variants

In the first embodiment and its modifications, the torque limiter 60 of the first embodiment includes the first member 64 having the protruding portion 64P and the recess 64R. The second member 66 includes a protruding portion 66P and a recess 66R. The protruding portion 64P is provided in the recess 66R. The protruding portion 66P is provided in the recess 64R. However, the structure of the torque limiter 60 is not limited to the structures described in the first embodiment and the second embodiment and their modifications.

In this application, the term "comprising" and its derivatives, as used herein, are intended to be open ended terms that specify the presence of the stated features, elements, components, groups, integers, and/or steps, but do not exclude the presence of other unstated features, elements, components, groups, integers, and/or steps. This concept also applies to words having similar meanings such as the terms, "have", "include" and their derivatives.

The terms "member," "section," "portion," "element," "body" and "structure" when used in the singular can have the dual meaning of a single part or a plurality of parts.

Ordinal numbers such as "first" and "second" cited in the present application are merely identifiers and do not have any other meaning (e.g., a particular order, etc.). Furthermore, for example, the term "first element" does not itself connote the presence of "second element", and the term "second element" does not itself connote the presence of "first element".

The term "a pair" as used herein may encompass configurations in which the pair of elements have shapes or structures that are different from each other, in addition to configurations in which the pair of elements have the same shape or structure as each other.

The terms "a" (or "an"), "one or more" and "at least one" can be used interchangeably herein.

The phrase "at least one of"..when used in this disclosure refers to "one or more" of the desired choice. For example, if the number of choices is two, then at least one of the phrases "..used in this disclosure" means "only one single choice" or "both choices". Also for example, if the number of choices is equal to or greater than three, then at least one of the phrases "..used in this disclosure" refers to "only one single choice" or "any combination of two choices. For example, the phrase "at least one of a and B" encompasses both (1) a alone, (2) B alone, and (3) a and B. The phrase "at least one of A, B and C" encompasses three of (1) a alone, (2) B alone, (3) C alone, (4) both a and B, (5) both B and C, (6) both a and C, and (7) A, B and C. In other words, in the present disclosure, the phrase "at least one of a and B" does not mean "at least one of a and at least one of B".

Finally, terms of degree such as "substantially", "about" and "approximately" as used herein mean a reasonable amount of deviation of the modified term such that the end result is not significantly changed. All numerical values described in this application can be construed to include terms such as "substantially," about, "and" approximately.

Obviously, many modifications and variations of the present invention are possible in light of the above teachings. It is, therefore, to be understood that within the scope of the appended claims, the invention may be practiced otherwise than as specifically described herein.

Claims

1. A motor unit for a bicycle component, comprising:

a torque limiter including a first member and a second member movable relative to each other in a state where a torque applied to the torque limiter is equal to or greater than a torque threshold value, the first member and the second member being movable together with each other in a state where the torque is less than the torque threshold value;

a drive structure having a drive structure axis of rotation, the drive structure comprising:

a first race;

a second race;

a first intermediate member at least partially disposed between the first race and the second race; and

A second intermediate member at least partially disposed between the first race and the second race;

the first intermediate member is configured to move toward the first race in response to the first intermediate member being urged by the second race in a first circumferential direction relative to the transmission rotational axis;

the first intermediate element is configured to move toward the first race in response to the first intermediate element being urged by the second race in a second circumferential direction different from the first circumferential direction;

the first intermediate element is configured to move away from the first race in response to the first intermediate element being urged in the first circumferential direction by the second intermediate element; and is also provided with

The first intermediate element is configured to move away from the first race in response to the first intermediate element being urged by the second intermediate element in the second circumferential direction different from the first circumferential direction.

2. The motor unit according to claim 1, wherein,

the first intermediate member is configured to rotate with the first race in a state in which the second race pushes the first intermediate member and the second intermediate member does not push the first intermediate member.

3. The motor unit according to claim 1, wherein,

the first intermediate member is configured to rotate relative to the first race in a state in which the second intermediate member pushes the first intermediate member and the second race does not push the first intermediate member.

4. The motor unit of claim 1, further comprising:

an electric motor;

an output member; and

a decelerator coupling the electric motor and the output member to transmit an output torque of the electric motor to the output member.

5. The motor unit according to claim 4, wherein,

the speed reducer includes the torque limiter and the transmission structure.

6. The motor unit according to claim 5, wherein,

the transmission structure is provided between the electric motor and the torque limiter on a power transmission path provided from the electric motor to the output member.

7. The motor unit according to claim 4, wherein,

the transmission structure is configured to transmit a first torque in a first load direction defined from the electric motor to the output member,

the transmission structure is configured to transmit a second torque in a second load direction defined from the output member to the electric motor, an

The first torque is greater than the second torque.

8. The motor unit according to claim 4, wherein,

the second member is configured to transmit a third torque to the first member in a second load direction defined from the output member to the electric motor in a state in which an external torque input to the output member is smaller than an external torque threshold,

the second member is configured to transmit a fourth torque to the first member in a second load direction in a state in which the external torque is equal to or greater than the external torque threshold, and the third torque is greater than the fourth torque.

9. The motor unit according to claim 1, wherein,

the torque limiter has a limiter axis of rotation, and

the limiter rotation axis is not coincident with the drive structure rotation axis.

10. The motor unit according to claim 1, wherein,

the torque limiter has a limiter axis of rotation, and

the limiter rotation axis is parallel to the drive structure rotation axis.

11. The motor unit according to claim 1, wherein,

the torque limiter has a limiter axis of rotation, and

the limiter rotation axis coincides with the transmission structure rotation axis.

12. The motor unit according to claim 4, wherein,

the first member slidably contacts the second member to transmit a third torque between the first member and the second member in a state in which an external torque input to the output member is less than an external torque threshold,

the first member slidably contacts the second member to transmit a fourth torque between the first member and the second member in a state where the external torque is equal to or greater than the external torque threshold value, and

the third torque is greater than the fourth torque.

13. The motor unit according to claim 1, wherein,

one of the first member and the second member includes a recess,

the other of the first member and the second member includes a protruding portion,

the protruding portion is configured to engage in the recess in a state in which the torque is smaller than the torque threshold to transmit a third torque between the first member and the second member,

the protruding portion is configured to disengage from the recess in a state where the torque is equal to or greater than the torque threshold to transmit a fourth torque between the first member and the second member, and

The third torque is greater than the fourth torque.

14. The motor unit of claim 1, further comprising:

a gear secured to the first member to transmit the torque from the transmission structure to the first member.

15. The motor unit according to claim 1, wherein,

the torque limiter includes a biasing member configured to bias at least one of the first member and the second member to maintain a contact state between the first member and the second member.

16. The motor unit of claim 1, further comprising:

a detection object configured to be detected by the detector, wherein,

the detection object is disposed on a downstream side with respect to the transmission structure on a power transmission path.

17. The motor unit of claim 1, further comprising:

a detection object configured to be detected by the detector, wherein,

the detection object is disposed on a downstream side with respect to the torque limiter on a power transmission path.

18. The motor unit according to claim 1, wherein,

the transmission structure is coupled to the torque limiter,

the transmission structure is configured to transmit a first torque to the torque limiter in a state in which the first input torque is applied to the transmission structure from a device other than the torque limiter,

The transmission structure is configured to transmit a second torque in a state where the second input torque is applied from the torque limiter to the transmission structure, and

the first torque is greater than the second torque.

19. A derailleur, comprising:

a base member;

a movable member;

a linkage movably coupling the base member and the movable member; and

the motor unit of claim 1, the motor unit disposed at one of the base member, the movable member, and the linkage.

20. The derailleur according to claim 19, further comprising:

a power supply attachment structure to which a power source is to be attached, the power supply attachment structure being disposed at one of the base member, the movable member, and the linkage.

21. The derailleur according to claim 20, wherein,

the motor unit is provided at one of the base member, the movable member, and the linkage, and

the power supply attachment structure is disposed at the other of the base member, the movable member, and the linkage.

22. The derailleur according to claim 20, wherein,

the motor unit is provided at one of the base member and the linkage, and

the power supply attachment structure is disposed at the other of the base member and the linkage.

23. A motor unit for a bicycle component, comprising:

an output member;

an electric motor including an output shaft;

a torque limiter disposed entirely inside the housing of the motor unit;

a transmission structure configured to transmit a first torque in a first load direction defined from the output shaft to the output member and configured to transmit a second torque in a second load direction defined from the output member to the output shaft, the transmission structure being configured to transmit torque in a plurality of rotational directions based on a rotational direction of the output shaft in a state in which the transmission structure transmits torque in the first load direction; and is also provided with

The first torque is greater than the second torque.

24. The motor unit of claim 23, wherein,

the torque limiter is configured to transmit a third torque in a state where the torque input to the torque limiter is less than a torque threshold,

The torque limiter is configured to transmit a fourth torque in a state where the torque input to the torque limiter is equal to or greater than the torque threshold value, and

the third torque is greater than the fourth torque.

25. The motor unit of claim 24, wherein,

the torque limiter comprises a first member and a second member,

the first member and the second member are in contact with each other to transmit the third torque between the first member and the second member in a state where the torque is smaller than the torque threshold, and

the first member and the second member are configured to transmit the fourth torque between the first member and the second member in a state in which the torque is equal to or greater than the torque threshold.