ELECTRIC BICYCLE FRONT DERAILLEUR STEERING SYSTEM

Abstract

Electric bicycle derailleur control system (12) comprising: a derailleur (20, 22) comprising a chain guide (36) for displacing a bicycle chain (BC), and an electric actuator (38) effectively coupled to the chain guide (36) for displacing the chain guide (36); a detection device (30, 32, 50) configured to detect information regarding a reaction force of the bicycle chain (BC); and a control device (48) configured to control the electric actuator (38) depending on the detected information.

Description

BACKGROUND Area of ​​the invention

[0001] This invention relates generally to an electric bicycle derailleur control system. More specifically, the present invention relates to an electric bicycle derailleur control system that shifts a chain guide using an electric actuator depending on detected information. Background information

[0002] Recently, some bicycles have been equipped with an electric drivetrain to make riding easier for the rider. The electric drivetrain often includes one or two electric derailleurs to move a bicycle chain between sprockets. The electric derailleurs typically have a chain guide and an electric actuator that moves the chain guide laterally to move the bicycle chain between sprockets. Typically, a rider operates a shifter to actuate the electric actuator of the electric derailleur to perform a gear shift. SUMMARY

[0003] In general, the present disclosure relates to various features of an electric bicycle derailleur control system comprising a chain guide that is moved laterally to move a bicycle chain between sprockets. In a conventional bicycle derailleur control system, the lateral displacement of the chain guide is predetermined in each sprocket position.

[0004] It has been discovered that chain tension varies while riding a bicycle. When chain tension is high, the derailleur chain guide must be moved further, as a reaction force from the chain interferes with the movement of the guide and disrupts its shifting action. Conversely, when chain tension is low, excessive movement of the derailleur chain guide must be avoided, as even a small reaction force from the chain can cause the chain to slip off the sprocket.

[0005] One aspect of an electric bicycle derailleur control system is the ability to appropriately determine the amount of chain guide displacement based on a detected chain reaction force. For example, if a large chain reaction force is detected, the chain displacement will be controlled to ensure the chain engages a target sprocket against this force. Conversely, if a small chain reaction force is detected, the chain guide displacement will be controlled to prevent excessive movement of the front derailleur chain guide.

[0006] In light of the prior art and according to a first aspect of the present disclosure, an electric bicycle derailleur control system is provided, which essentially comprises a derailleur, a detection device, and a control unit. The derailleur includes a chain guide and an electric actuator. The chain guide is configured to displace a bicycle chain. The electric actuator is effectively coupled to the chain guide to displace the chain guide. The detection device is configured to detect information regarding a reaction force of the bicycle chain. The control unit is configured to control the electric actuator depending on the detected information.

[0007] According to a second aspect of the present invention, the electric bicycle derailleur control system according to the first aspect is configured such that the control device is further configured to control the electric actuator such that a displacement amount of the chain guide during a shift operation is a first displacement amount if the detected information from the detection device indicates that a detected chain reaction force is less than a first predetermined amount, and such that the displacement amount of the chain guide is a second displacement amount that is greater than the first displacement amount if the detected information from the detection device indicates that a detected chain reaction force is greater than or equal to the first predetermined amount.

[0008] According to a third aspect of the present invention, the electric bicycle derailleur control system according to the second aspect is configured such that the control device is further configured to control the electric actuator to move the chain guide, which is in a switching operation in which the displacement amount of the chain guide is the second displacement amount, in a direction opposite to an existing displacement direction, when the detected information of the detection device indicates a detected chain reaction force reduction rate that is greater than or equal to a predetermined chain reaction force reduction rate.

[0009] According to a fourth aspect of the present invention, the electric bicycle derailleur control system according to the second or third aspect is configured such that the control device is further configured to control the electric actuator to stop the displacement of the chain guide, which is in a shift actuation where the displacement amount of the chain guide is the second displacement amount, in an existing displacement direction when the detected information of the detection device indicates a detected chain reaction force reduction rate that is greater than or equal to a predetermined chain reaction force reduction rate.

[0010] According to a fifth aspect of the present invention, the electric bicycle derailleur control system according to the third aspect is configured such that the control device is further configured to control the electric actuator to move the chain guide in the opposite direction after the detection device has detected the chain reaction force reduction rate within a prescribed time period.

[0011] According to a sixth aspect of the present invention, the electric bicycle derailleur control system according to the third aspect is configured such that the control device is further configured to control the electric actuator to stop the displacement of the chain guide after the detection device has detected the chain reaction force reduction rate.

[0012] According to a seventh aspect of the present invention, the electric bicycle derailleur control system is configured according to one of the first to sixth aspects such that the electric actuator comprises an electric motor; and the control device is further configured to control a degree of rotation of an output shaft of the motor based on the detected information.

[0013] According to an eighth aspect of the present invention, the electric bicycle derailleur control system is designed according to one of the first to seventh aspects such that the detection device comprises a strain gauge arranged on a part of the derailleur which receives a reaction force from the chain guide which displaces the chain.

[0014] According to a ninth aspect of the present invention, the electric bicycle derailleur control system according to the eighth aspect is designed such that the part of the derailleur comprises at least one of the chain guide, a linkage part of a linkage assembly connecting the electric actuator to the chain guide, and a gear connected to a motor of the electric actuator.

[0015] According to a tenth aspect of the present invention, the electric bicycle derailleur control system according to the eighth aspect is designed such that the control device is further configured to control the electric actuator to move the chain guide into a trim position when the detected information from the detection device indicates that a detected chain reaction force is less than a predetermined amount for a longer than a predetermined time period.

[0016] According to an eleventh aspect of the present invention, the electric bicycle derailleur control system is designed according to one of the first to seventh aspects such that the detection device comprises a current sensor configured to measure a current of the electric actuator.

[0017] According to a twelfth aspect of the present invention, the electric bicycle derailleur control system according to the eleventh aspect is configured such that the control device is further configured to control the electric actuator to shift the chain guide according to a current value of the actuator detected by the current sensor, such that a displacement amount of the chain guide varies based on the detected current value of the electric actuator.

[0018] According to a thirteenth aspect of the present invention, the electric bicycle derailleur control system is designed according to one of the first to seventh aspects such that the detection device comprises a torque sensor configured to measure a torque of a bicycle component.

[0019] According to a fourteenth aspect of the present invention, the electric bicycle derailleur control system is designed according to the thirteenth aspect such that the bicycle component comprises at least one of a crank axle shaft, a crank arm, a pedal and a rear hub.

[0020] According to a fifteenth aspect of the present invention, an electric bicycle derailleur control system is provided, which essentially comprises a derailleur, a detection device, and a control unit. The derailleur includes a chain guide and an electrical actuator. The chain guide is configured to displace a bicycle chain. The electrical actuator is effectively coupled to the chain guide to displace the chain guide. The detection device is configured to detect information regarding a reaction force of the bicycle chain.The control device is designed to control the electrical actuator such that the chain guide is moved from a rest position to a first switching position when the detected information indicates that a detected chain reaction force is less than a first predetermined amount, and such that the chain guide is moved from the rest position to a second switching position, which is further away from the rest position than the first switching position, when the detected information indicates that the detected chain reaction force is greater than or equal to the first predetermined amount.

[0021] According to a sixteenth aspect of the present invention, an electric bicycle derailleur control system is provided, which essentially comprises a derailleur, a torque sensor, and a control unit. The derailleur includes a chain guide and an electrical actuator. The chain guide is configured to move a bicycle chain. The electrical actuator is effectively coupled to the chain guide to move the chain guide. The torque sensor is configured to measure the torque of a bicycle component.The control device is designed to control the electrical actuator, to move the chain guide depending on a torque of the bicycle component detected by the torque sensor, such that the chain guide is moved from a rest position to a first shift position when the detected torque is less than a first predetermined amount, and such that the chain guide is moved from the rest position to a second shift position, which is further away from the rest position than the first shift position, when the detected torque is greater than or equal to the first predetermined amount.

[0022] Other tasks, features and advantages of the disclosed electric bicycle derailleur control system will also become clear to experts from the following detailed description, which, together with the accompanying drawings, reveals an illustrative embodiment of the electric bicycle derailleur control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Reference is now made to the attached drawings, which form part of this original revelation:

[0024] Fig. Figure 1 is a left side view of a bicycle equipped with an electric bicycle derailleur control system according to an embodiment shown;

[0025] Fig. Figure 2 is a block diagram of the electric bicycle derailleur control system according to the embodiment shown;

[0026] Fig. 3 is an enlarged exterior view of the in Fig. 1 front derailleur shown;

[0027] Fig. Figure 4 is a graph showing a change in torque over a period of time encompassing the movement of the chain guide from the retracted position to the extended position;

[0028] Fig. Figure 5 is a graph showing a change in the motor current over a period of time that includes the movement of the chain guide from the retracted position to the extended position.

[0029] Fig. 6 is a front view of the in Fig. 3 front derailleur shown, with the chain guide in the retracted position, the front cover removed, and a section of the output shaft cover broken off;

[0030] Fig. 7 is a front view of the [item] in the Fig. 3 and Fig. 6 front derailleur shown, with the chain guide in the extended position, the front cover removed, and a section of the output shaft cover broken off;

[0031] Fig. Figure 8 is a partially expanded perspective view of the front derailleur, which is located in the Fig. 3, Fig. 6 and Fig. 7 is shown; and

[0032] Fig. 9 is a partial front view of the front derailleur, which is located in the Fig. 3 and Fig. 6 to Fig. 8 is shown. DETAILED DESCRIPTION OF THE EXECUTION FORMS

[0033] Selected embodiments will now be explained with reference to the drawings. It will be clear to those skilled in the field of bicycles from this disclosure that the following descriptions of the embodiments are provided for illustrative purposes only and not for the purpose of limiting the invention as described by the appended claims and their equivalents.

[0034] Initially, one refers to Fig. 1, a bicycle will be placed there 1 shown, which is equipped with an electric bicycle derailleur control system. 12 is equipped according to a first embodiment. Fig. 1 is the bicycle 1A road bicycle, which essentially consists of a bicycle frame F, a front fork FF, drop handlebars H, a front wheel FW, and a rear wheel RW. However, the electric bicycle derailleur control system discussed here is... 12 It is not limited to the bicycle shown, but can rather be adapted to other types of bicycles, such as a suspension bicycle (off-road bicycle). The bicycle also includes 1 other various bicycle components that are important for understanding the electric bicycle derailleur control system 12 are not relevant to this present disclosure. Therefore, these other various bicycle components of the bicycle 1 not discussed here.

[0035] Here, the bicycle frame F, which houses the bicycle's drivetrain. 1 carries the powertrain 1 It is a chain drive, conventionally used in bicycles. The bicycle's drivetrain1The system comprises a plurality of front sprockets FS, a plurality of rear sprockets RS, and a bicycle chain BC. The bicycle chain BC is engaged with one of the front sprockets FS and one of the rear sprockets RS to transmit the rotation of the engaged front sprocket FS to the engaged rear sprocket RS. More precisely, the front sprockets FS are rotatably mounted to the bicycle frame F by means of a crank axle CA in the conventional manner. The crank axle CA has a first crank arm C1, which is mounted at a first end of the crank axle CA, and a second crank arm C2, which is mounted at a second end of the crank axle CA. The first crank arm C1 has a first pedal P1, which is mounted at a free end of the first crank arm C1. The second crank arm C2 has a second pedal P2, which is rotatably mounted at a free end of the second crank arm C2.The rear sprockets RS are attached to the rear hub RH of the rear wheel RW in the conventional manner. Thus, a pedaling action transmits a pedaling force from the front sprockets FS to the rear sprockets RS via the bicycle chain BC, causing the rear wheel RW to rotate.

[0036] In the embodiment shown, as in Fig. 1. To see, the electric bicycle derailleur control system. 12 essentially a pair of switching actuators 14 and 16 (only one is in Fig. (1 to be seen), a front electric bicycle derailleur 20 , a rear electric bicycle derailleur 22 , a bicycle computer 24 and an energy source 26 The electric bicycle derailleur control system 12 It also includes at least one detection device. 30 and / or 32, which are attached to at least one bicycle component (e.g., the crank axle CA, the first crank arm C1, the second crank arm C2, the first pedal P1, the second pedal P2, the rear hub RH, the front electric bicycle derailleur) 20 and the rear electric bicycle derailleur 22 ) is planned. However, the electric bicycle derailleur control system 12 It is not limited to this particular arrangement and does not necessarily require all of the devices. While the electric bicycle derailleur control system 12 for example, it is shown in such a way that it includes both the front electric bicycle derailleur. 20 as well as the rear electric bicycle derailleur 22 Once activated, experts in the field of bicycles will understand that the electric bicycle derailleur control system 12 It can be trained to use only one of the front electric bicycle derailleurs. 20 and the rear electric bicycle derailleur22 to control. The electric bicycle derailleur control system could also be used. 12 have only a single shifting device that controls both the front electric bicycle derailleur 20 as well as the rear derailleur 22 using one or more of the detection devices discussed below 30 and 32 activated. For the sake of brevity, the front electric bicycle derailleur will be described below. 20 and the rear electric bicycle derailleur 22 than the derailleur 20 or the front derailleur 22 designated.

[0037] Referring to Fig. 2, that's where the electric bicycle derailleur control system is located. 12 for controlling the front electric bicycle derailleur 20 This is shown in a diagram. However, the same setup can be used for the rear electric bicycle derailleur. 22This is intended. Therefore, the electric bicycle derailleur control system is... 12 essentially with a front derailleur (one of the derailleurs) 20 and 22 ), a detection device (one or more of the detection devices 30 and 32 ) and a control device (one that is attached to the derailleurs) 20 or 22 is provided for, or a remote control device that is provided for on a bicycle component, such as the bicycle computer 24 ) provided. In the embodiment shown, the bicycle derailleur control system is used here. 12 Electrical power line communication technology to communicate between the electric bicycle components, as well as to supply the electric bicycle components with electrical energy from the energy source. 26 to supply. Of course, the electric bicycle derailleur control system. 12not limited to the use of electrical power line communication technology. Rather, experts in the field of bicycles will understand that the electric bicycle derailleur control system 12 can use signal lines and / or wireless communication technology to communicate between the electric bicycle components, instead of or in conjunction with electrical power line communication technology.

[0038] Still referring to the Fig. 2 includes the switching actuation device 16a front derailleur upshift switch FSU-SW and a front derailleur downshift switch FSD-SW. The front derailleur upshift switch FSU-SW is actuated by a control element, such as a lever or a button. Similarly, the front derailleur downshift switch FSD-SW is actuated by a control element, such as a lever or a button, which may be the same as that used for the front derailleur upshift switch FSU-SW or a separate one. The shifting device 16 is via a power line 34 with the energy source 26 connected. The switching device 16 and the energy source 26 Each includes a power line communication module (not shown) for performing power line communication. While the power line 34 is presented in such a way that it is directly connected to the energy source 26Once connected, it will be clear to experts in the field of bicycles that an electrical wiring connection point between the power source 26 and the switching device 16 and may be provided for the other electric bicycle components that are connected to the energy source 26 are electrically connected to transfer electrical energy from the energy source 26 to receive.

[0039] Still referring to the Fig. 2 and Fig. 3, the derailleur includes 20 a chain guide 36 and an electric actuator 38 The front derailleur 20 It also includes a basic element 40 , a first framework 41 and a second frame 42 The basic element 40 is designed to be mounted on the bicycle frame F in the conventional manner. The basic element 40 is designed, the electrical actuator 38to wear. The basic element is also 40 trained, the chain guide 36 about the first and second linkages 41 and 42 to wear. The chain guide 36 is designed to shift the BC bicycle chain. More precisely, the electric actuator 38 effectively to the chain guide 36 coupled to guide the chain 36 via the second linkage 42 to postpone. As in Fig. 2, shown here, includes the electrical actuator. 38 an electric motor 38a The electric actuator 38 also includes a motor driver 38b , which is a circuit that effectively connects to the electric motor 38a is coupled to control the operation of the electric motor 38a to control the electric motor 38ais a reversible electric motor that is driven by a part driven by the motor (for example, comprising a reduction mechanism and / or the second linkage). 42 ) mechanically with the chain guide 36 is connected. The electric motor 38a and the motor driver 38b are within an actuator housing 38c arranged (see Fig. 3) The electric motor 38a exhibits an output wave 38d on, which uses a reduction mechanism 44 (partly in the Fig. 6 and Fig. (shown in 7) with the second linkage 42 is connected. An output wave 44a of the reduction mechanism 44 protrudes from the actuator housing 38c out of here.

[0040] The second linkage 42 is with the output wave 44a of the reduction mechanism 44 connected. The reduction mechanism 44 a fan gear44b up, which is firmly attached to the output shaft 44a is mounted to the output shaft 44a to turn, which in turn controls the chain guide 36 about the first and second linkages 41 and 42 moved.

[0041] The front derailleur 20 is connected to the energy source 26 through a power line 46 connected, either directly to the energy source as shown 26 or may be connected via an electrical wiring point. The derailleur 20 It also includes a switching control device. 48 , which are located inside the actuator housing 38c is arranged (see Fig. 3) The switching control unit 48 is provided on a printed circuit board, which also includes the motor driver circuitry. 38b includes. In response to user input from the switching device. 16or an automatic switching command from the bicycle computer 24 controls the switching control unit 48 the operation of the electric motor 38a using the motor driver 38b , to guide the chain 36 to move the switching control unit 48 includes a power line communication module (not shown) for performing power line communication with the other electric bicycle components and the detection devices connected to the power source. 26 are electrically connected. The functions of the switching control unit 48 can be provided by a remotely located control unit attached to one of the other electrical bicycle components, such as the bicycle computer 24 , is planned. For the sake of brevity, the switching control device 48 subsequently the control device 48 designated.

[0042] Still referring to Fig. 2, includes the detection device 30 a strain gauge attached to part of the derailleur 20 is arranged so that a reaction force is exerted by the chain guide 36 It records the movement that shifts the BC chain. The detection device 30 is trained to detect information regarding the reaction force of the BC bicycle chain. The part of the derailleur. 20 The strain gauge includes at least one of the chain guides 36 , the first or the second linkage 41 and 42 , which is the electrical actuator 38 with the chain guide 36 connect, and a gear (e.g. the gear) 44b ), the one with the engine 38a of the electrical actuator 38 is connected. In other words, the extensometer is designed in such a way that at least one of the chain guides is connected. 36 , a linkage part of the first or second linkage 41 and 42and the gear (e.g. the gear) 44b ) to be attached. In the embodiment shown, the detection device comprises 30 three strain gauges S1, S2 and S3, which are mounted on an inner guide plate 36a the chain guide 36 are provided. The detection device 30 preferably comprises three strain gauges to more accurately detect the reaction force of the bicycle chain BC. Preferably, a plurality of strain gauges (e.g., three strain gauges) are mounted on the inner guide plate. 36a along a longitudinal direction of the inner guide plate 36a In this embodiment, the strain gauges are attached to an outer surface of the inner guide plate to avoid direct contact with the bicycle chain BC. It will be obvious to those skilled in the field of bicycles that any number of strain gauges on the chain guide 36 can be applied.

[0043] Additionally or alternatively, the detection device includes 30 a strain gauge S4 , which is attached to the first pole 41 is provided for. Additionally or alternatively, the detection device includes 30 an S5 strain gauge, which is attached to the second linkage 42 is provided for. Additionally or alternatively, the detection device includes 30 a strain gauge S6, which is attached to the gear 44b It is intended that the engine 38a of the electrical actuator 38 is connected. However, the reaction force of the bicycle chain BC can be detected in other ways, as described below.

[0044] As the detected chain reaction force decreases, so does the degree of rotation of the output wave. 38d of the electric motor 38a smaller. Thus, the displacement of the chain guide becomes smaller. 36smaller, while the detected chain reaction force decreases. As the detected chain reaction force increases, so does the degree of rotation of the output wave. 38d of the electric motor 38a greater. Thus, the displacement of the chain guide becomes larger. 36 larger, while the detected chain reaction force also increases. When the strain gauge of the detection device 30 If a sudden drop in the detected chain reaction force is detected, then the control device stops. 48 the chain guide 36 or moves the chain guide 36 back, to prevent the chain from falling off. In this way, the electric motor can 38a through the control unit 48 so that the bicycle chain maintains contact with the chain guide 36 avoids, while the chain guide 36 is in a rest position (while the chain guide 36(is not in a switching operation).

[0045] At the moment of the sudden drop in chain reaction force, the control device can 48 Determine whether the bicycle chain BC is engaged with a chain rivet (pin) (shifting outwards), or determine whether the bicycle chain BC is disengaged from a larger sprocket (shifting inwards). After a certain moment, the bicycle chain will engage with the larger (or smaller) sprocket. However, if the detected force is large and the chain guide 36 If it shifts too much, then the control unit 48 programmed to control the chain after a predetermined time period from the moment the sudden drop in chain reaction force is detected. 36 to move back (to be driven in).

[0046] In the embodiment shown, the electric bicycle derailleur control system includes 12Furthermore, the aforementioned detection devices 32 and a detection device 50 , which is discussed below, to indirectly detect information regarding a reaction force of the bicycle chain BC. It will be clear to experts in the field of bicycles that only one of these detection devices 30 , 32 and 50 This is necessary to provide information regarding the reaction force of the bicycle chain BC. Thus, two of the detection devices can be used. 30 (Extensometer), 32 (Torque sensor) 50 (Current sensor) from the in Fig. 2 electric bicycle derailleur control systems shown 12 can be omitted. However, the electric bicycle derailleur control system can be used. 12 as requested, with one or more of these detection devices 30 , 32 and 50 be provided.

[0047] In the case of the detection device 32The electric bicycle derailleur control system includes 12 the detection device 32 , which includes a torque sensor configured to measure the torque of a bicycle component. The bicycle component comprises at least one crank axle, a crank arm, a pedal, and a rear hub, where the torque is to be applied. Thus, the detected information regarding a reaction force of the bicycle chain BC can be processed by the torque sensor of the detection device. 32A system is provided that indirectly detects information regarding the reaction force of the bicycle chain (BC). This is because chain tension increases during gear shifting depending on the pedaling force detected by the torque sensor. Thus, the torque sensor can indirectly detect an increase in the chain reaction force when the detected torque increases, since the torque is related to the chain tension, which is assumed to be proportional to the chain reaction force during gear shifting. Fig. Figure 4 is a graph showing a change in torque over a period of time, which corresponds to the movement of the chain guide. 36 from the retracted position ( Fig. 6) into the extended position ( Fig. 7) includes. As the detected torque decreases, so does the degree of rotation of the output shaft. 38d of the electric motor 38asmaller. Thus, the displacement of the chain guide becomes smaller. 36 The detected torque decreases as the detected torque decreases. As the detected torque increases, so does the degree of rotation of the output shaft. 38d of the electric motor 38a greater. Thus, the displacement of the chain guide becomes larger. 36 larger, while the detected torque also increases. If the torque sensor of the detection device 32 If a sudden drop in the detected chain reaction force is detected, then the control device stops. 48 the chain guide 36 or moves the chain guide 36 back, to prevent the chain from falling off. In this way, the electric motor can 38a through the control unit 48 so that the bicycle chain BC maintains contact with the chain guide 36 avoids, while the chain guide 36 is in a resting position.

[0048] In the case of the detection device 50 On the other hand, it includes the electric bicycle derailleur control system. 12 the detection device 50 , which includes a current sensor designed to detect a current from the electrical actuator 38 to measure. The current sensor of the detection device. 50 It indirectly detects information regarding the reaction force of the bicycle chain BC. This is because the current increases when the chain reaction force increases during shifting, as a large current is necessary to drive the output shaft. 38d to rotate against a resisting force, such as the chain reaction force. In the case of using the current sensor of the detection device. 50 is the control unit 48 further trained, the electrical actuator 38 to control the chain guidance 36 according to a current value of the actuator detected by the current sensor38 to shift so that a displacement amount of the chain guide 36 based on the detected current value of the electrical actuator 38 varies. Furthermore, the control unit 48 furthermore, it is designed to determine the degree of rotation of the output shaft. 38d of the engine 38a to control based on the detected information. Fig. 5 is a graph showing a change in the motor current of the electric motor. 38a over a period of time that indicates the movement of the chain guide 36 from the retracted position ( Fig. 6) into the extended position ( Fig. 7) includes. While the motor current of the electric motor 38a As the degree of rotation of the output shaft decreases, so does the degree of rotation of the output shaft. 38d of the electric motor 38a smaller. Thus, the displacement of the chain guide becomes smaller. 36 smaller, while the motor current of the electric motor 38aIt gets smaller. While the motor current of the electric motor 38a As the size increases, so does the degree of rotation of the output shaft. 38d of the electric motor 38a greater. Thus, the displacement of the chain guide becomes larger. 36 larger, while the motor current of the electric motor 38a increases. When the current sensor of the detection device 50 a sudden drop in the motor current of the electric motor 38a If detected, then the control unit stops. 48 the chain guide 36 or moves the chain guide 36 back, to prevent the chain from falling off. In this way, the electric motor can 38a through the control unit 48 so that the bicycle chain BC maintains contact with the chain guide 36 avoids, while the chain guide 36 is in a resting position.

[0049] The control unit 48is designed, the electrical actuator 38 depending on the information detected by one or more of the detection devices 30 , 32 and 50 to control. More precisely, the control device 48 trained, the electrical actuator 38 to control the chain guidance 36 The device is moved from a rest position to a first switching position when the detected information indicates that a detected chain reaction force is less than a predetermined amount. In other words, the control device 48 further trained, the electrical actuator 38 to control in such a way that a displacement amount of the chain guide 36 a first displacement amount is reached during a switching operation if the detected information of at least one of the detection devices 30 , 32 , and 50indicates that a detected chain reaction force is smaller than a first predetermined amount.

[0050] The control unit 48 is also designed to be the electrical actuator 38 to control the chain guidance 36 The device is moved from a rest position to a second switching position, which is further away from the rest position than the first switching position, if the detected information indicates that the detected chain reaction force is greater than or equal to a first predetermined value. In other words, the control device 48 further trained, the electrical actuator 38 to control in such a way that the displacement amount of the chain guide 36 a second shift amount is greater than the first shift amount if the detected information is from at least one of the detection devices 30 , 32 , and 50indicates that a detected chain reaction force is greater than or equal to a first predetermined amount.

[0051] If the control unit 48 determined that the chain guide 36 The control unit may have moved too far in a current displacement direction due to over-switching. 48 A chain drop prevention mechanism is activated. More precisely, the control device 48 further trained, the electrical actuator 38 to control the chain guidance 36 , which is located in a switching mechanism where the displacement amount of the chain guide 36 The second displacement amount is to shift in a direction opposite to an existing displacement direction, if the detected information of at least one of the detection devices 30 , 32 , 50It indicates a detected chain reaction force decay rate that is greater than or equal to a predefined chain reaction force decay rate, i.e., the chain reaction force drops suddenly during the switching operation. It is possible that the control unit 48 the electric actuator 38 so that the chain guidance 36 is moved in the opposite direction before the chain guide reaches the second shift position, if at least one of the detection devices 30 , 32 , 50 The chain reaction force decay rate is detected, which is greater than or equal to the specified chain reaction force decay rate.

[0052] The control unit 48 is furthermore designed to be the electrical actuator 38 to control the chain guidance 36 to shift in the opposite direction after at least one of the detection devices 30 , 32 and50 The control unit detects the rate of decrease in chain reaction force within a prescribed time period (e.g., 0 to 10 milliseconds). In other words, it controls the chain reaction force. 48 the electric actuator 38 , the chain guide 36 to shift in the current direction of displacement for a prescribed period of time in order to terminate the switching operation. Afterwards, at least one of the detection devices will 30 , 32 and 50 detect a decrease in the chain reaction force due to the engagement of the bicycle chain with the targeted front sprockets, since at this time the bicycle chain BC tends to influence the chain guide 36 to exit. Within a prescribed time period (e.g., 0 to 10 milliseconds), the control unit will 48 the electric motor 38a reverse to guide the chain 36to move in the opposite direction. Alternatively, the control device 48 further trained, the electrical actuator 38 to control the shifting of the chain guide 36 to stop after at least one of the detection devices 30 , 32 and 50 The chain reaction force decay rate is detected. Whether the control unit 48 only the chain guide 36 stops or the chain guide 36 moved in the opposite direction after the detection device 30 The chain reaction force reduction rate detected can be set by the user based on a selected gear ratio (i.e. determined by the engagement of the bicycle chain BC with the front or rear sprocket) or pre-programmed to be one of these.

[0053] The control unit 48is furthermore designed to be the electrical actuator 38 to control the shifting of the chain guide 36 , which is located in a switching mechanism where the displacement amount of the chain guide 36 The second displacement amount is to stop in an existing displacement direction when the detected information of at least one of the detection devices 30 , 32 and 50 indicates a detected chain reaction force decay rate that is greater than or equal to a specified chain reaction force decay rate.

[0054] In this way the control unit 48 the appropriate displacement amount of the chain guide 36 depending on the detected reaction force of the bicycle chain BC with the chain guide 36 determine. For example, if a detected reaction force of the chain is large, then the displacement of the chain will be 36The force is controlled so that it is large enough to reliably engage the bicycle chain BC with the sprocket FS, which is set as the target, against the reaction force of the bicycle chain BC. If, on the other hand, the detected reaction force of the bicycle chain BC is small, then the displacement of the chain guide is reduced. 36 controlled to prevent the chain guide 36 of the front derailleur 20 is shifted too much.

[0055] If the torque of a bicycle component is used as the detected information, the control unit 48 trained, the electrical actuator 38 to control the chain guidance 36 depending on a reading from the torque sensor of the detection device 32 to shift the detected torque of the bicycle component so that the chain guide 36is moved from a rest position to a first switching position when the detected torque is less than a first predetermined amount, and in such a way that the chain guide 36 The device is moved from its rest position to a second switching position, which is further away from the rest position than the first switching position, if the detected torque is greater than or equal to the first predetermined value. This is because the torque sensor of the detection device... 32 If a chain reaction force is not directly detected, the control device may 48 the displacement amount of the chain guide 36 depending on the information detected by the torque sensor of the detection device 32 Start shortly before the shifting action begins. In such a case, the detected information does not correspond to the chain reaction force, but to a chain tension when the shifting action begins.

[0056] By using the detection device 30 (i.e., one of the strain gauges S1 to S6), which detects a chain reaction force, it is possible to determine the position of the chain guide. 36 to adjust, even if the chain guide 36 is not moved. If the detection device 30 If a chain reaction force is detected that is less than a predetermined level, and it is detected continuously for longer than a predetermined duration, then the control device can 48 determine that the BC bicycle chain guides the chain 36 touched. To avoid a touch noise, the control unit controls 48 the electric motor 38a to guide the chain 36 to move into a trim position. In other words, the control unit 48 further trained, the electrical actuator 38 to control the chain guidance 36to move into a trim position when the detected information of the detection device 30 This indicates that a detected chain reaction force is less than a specified amount for a longer than a predetermined duration. The term "trim position" refers to a chain guide position that is slightly offset from being centered over the engaged sprocket.

[0057] As in Fig. 2 can be seen, the derailleur 20 optionally with a position sensor 52 be provided to facilitate movement of the chain guide 36 by controlling the electric motor 38a to help. The position sensor 52It can be a potentiometer comprising a stationary electrical contact plate and a movable electrical brush plate, or a photointerrupter comprising a light source or LED arranged on one side of a shutter wheel and a light detector, such as a phototransistor, arranged on the other side of the shutter wheel. Thus, the detection information is provided by the position sensor. 52 through the control unit 48 received to power the electric motor 38a to move the chain guide 36 to control more precisely. In this way, the control unit can 48 Information indicating a chain reaction force, in conjunction with movement data of the chain guide 36 use to adjust the position of the chain guide 36 to control it differently each time a switching operation takes place.

[0058] If one now turns to the Fig. 6 to Fig.9 to, a mounting arrangement of the electrical actuator is created. 38 on the basic element 40 described. First, the basic element is 40 by means of a screw 60 (a threaded fastening element) is mounted on the bicycle frame F. Thus, the electric actuator is 38 about the basic element 40 mounted on the bicycle frame F. The electric actuator 38 is solvable at the base element 40 through a mounting pin 62 and a screw 64 assembled. In particular, the housing 38c of the electrical actuator 38 with a pair of mounting flanges 38c1 and 38c2 and a mounting bag 38c3 provided, while the basic element 40 with a pair of mounting flanges 40a and 40b and an assembly advantage 40c Each of the mounting flanges is equipped with 38c1 , 38c2 ,40a and 40b has a hole that is dimensioned to accommodate the mounting pin 62 to be gripped by friction. In this way the housing 38c of the electrical actuator 38 on the basic element 40 fastened. The mounting pin 62 is also used to form an external connecting link 41a of the first rod 41 on the basic element 40 to be mounted in a swiveling position. The mounting projection 40c is dimensioned so that it fits through the mounting bag 38c3 The formed recess fits. The screw 64 A hole runs through the mounting bag. 38c3 and a hole in the mounting projection 40c and is then inserted into a threaded hole in the housing. 38c of the electrical actuator 38 screwed. In this way the housing is 38c of the electrical actuator 38 on the basic element 40 attached.

[0059] For the purposes of understanding the scope of the present invention, the term "comprising" and its derivatives, as used herein, shall be understood as open terms that indicate the presence of the specified features, elements, components, groups, numbers, and / or steps, but do not exclude the presence of other, unspecified features, elements, components, groups, numbers, and / or steps. The foregoing also applies to words with similar meanings, such as "include," "exhibit," and their derivatives. Furthermore, unless otherwise specified, the terms "part," "section," "component," or "element," when used in the singular, may have the dual meaning of a single part or a plurality of parts.

[0060] As used here, the following directional terms "side facing the frame", "side not facing the frame", "forward", "backward", "front", "back", "top", "bottom", "above", "below", "upwards", "downwards", "top", "bottom", "side", "vertical", "horizontal", "at right angles" and "transverse", as well as all other similar directional terms, refer to the directions of a bicycle in an upright riding position, equipped with the electric bicycle derailleur control system. 12 is equipped with it. Accordingly, these directional terms, as they are used to describe the electric bicycle derailleur control system, should be relative to a bicycle equipped with the electric bicycle derailleur control system. 12The markings are to be interpreted in an upright riding position on a horizontal surface. The terms "left" and "right" are used to indicate "right" when referring to the right side as seen from the rear of the bicycle, and to indicate "left" when referring to the left side as seen from the rear of the bicycle.

[0061] It is also understood that, although the terms "first" and "second" may be used here to describe different components, these components should not be limited by these terms. These terms are only used to distinguish one component from another. Thus, for example, a first component discussed above could be referred to as a second component, and vice versa, without departing from the teachings of the present invention.The term "fastened" or "fasten," as used here, encompasses configurations where one element is directly attached to another by directly affixing the element to the other; configurations where the element is indirectly attached to the other by affixing the element to the intermediate element(s), which are in turn affixed to the other element; and configurations where one element is integral with another, i.e., one element is essentially part of the other. This definition also applies to words with similar meanings, for example, "joined," "connected," "coupled," "mounted," "linked," "fixed," and their derivatives.Finally, terms of magnitude, such as "essentially", "approximately" and "nearly", as used here, signify a degree of deviation from the relativized concept, such that the final result is not significantly altered.

[0062] Although only selected embodiments have been chosen to illustrate the present invention, it will be clear to those skilled in the art from this disclosure that various changes and modifications can be made here without departing from the scope of the invention as defined in the appended claims. For example, unless otherwise specified, the size, shape, location, or orientation of the various components can be changed as required and / or desired, provided that the changes do not substantially impair their intended function. Unless specifically stated otherwise, components shown to be directly connected or in contact with one another may have intermediate structures arranged between them, provided that the changes do not substantially impair their intended function.The functions of one element can be performed by two, and vice versa, unless specifically stated otherwise. The structures and functions of one embodiment can be incorporated into another embodiment. It is not necessary for all advantages to be present simultaneously in a particular embodiment. Any feature that is unique compared to the prior art, alone or in combination with other features, should also be considered a separate description of further inventions of the applicant, including the structural and / or functional concepts embodied by such feature(s). Thus, the foregoing descriptions of embodiments according to the present invention are provided for clarification only and not for the purpose of limiting the invention as described by the appended claims and their equivalents.

Claims

[1] Electric bicycle derailleur control system, comprising: a derailleur comprising a chain guide to move a bicycle chain and an electrical actuator that is effectively coupled to the chain guide to move the chain guide; a detection device designed to detect information regarding a reaction force of the bicycle chain; and a control device that is designed to control the electrical actuator depending on the detected information. [2] Electric bicycle derailleur control system according to claim 1, wherein the control device is further configured to control the electric actuator such that a displacement amount of the chain guide during a shift operation is a first displacement amount if the detected information of the detection device indicates that a detected chain reaction force is less than a first predetermined amount, and that the displacement amount of the chain guide is a second displacement amount that is greater than the first displacement amount if the detected information of the detection device indicates that a detected chain reaction force is greater than or equal to the first predetermined amount. [3] Electric bicycle derailleur control system according to claim 2, wherein the control device is further configured to control the electric actuator to move the chain guide, which is in a switching operation in which the displacement amount of the chain guide is the second displacement amount, in a direction opposite to an existing displacement direction, when the detected information of the detection device indicates a detected chain reaction force reduction rate which is greater than or equal to a predetermined chain reaction force reduction rate. [4] Electric bicycle derailleur control system according to claim 2 or 3, wherein the control device is further configured to control the electric actuator to stop the displacement of the chain guide, which is in a switching actuation in which the displacement amount of the chain guide is the second displacement amount, in an existing displacement direction when the detected information of the detection device indicates a detected chain reaction force reduction rate which is greater than or equal to a predetermined chain reaction force reduction rate. [5] Electric bicycle derailleur control system according to claim 3, wherein the control device is further configured to control the electric actuator to move the chain guide in the opposite direction after the detection device has detected the chain reaction force reduction rate within a prescribed time period. [6] Electric bicycle derailleur control system according to claim 3, wherein the control device is further configured to control the electric actuator to stop the displacement of the chain guide after the detection device has detected the chain reaction force reduction rate. [7] Electric bicycle derailleur control system according to any one of claims 1 to 6, wherein the electric actuator includes an electric motor; and The control unit is further designed to control the degree of rotation of an output shaft of the motor based on the detected information. [8] Electric bicycle derailleur control system according to any one of claims 1 to 7, wherein the detection device comprises a strain gauge arranged on a part of the derailleur which receives a reaction force from the chain guide which displaces the chain. [9] Electric bicycle derailleur control system according to claim 8, wherein the derailleur part comprises at least one of the chain guide, a linkage part of a linkage assembly connecting the electric actuator to the chain guide, and a gear connected to a motor of the electric actuator. [10] Electric bicycle derailleur control system according to claim 8, wherein the control device is further configured to control the electric actuator to move the chain guide into a trim position when the detected information from the detection device indicates that a detected chain reaction force is less than a predetermined amount for a longer than a predetermined time period. [11] Electric bicycle derailleur control system according to any one of claims 1 to 7, wherein the detection device comprises a current sensor configured to measure a current of the electric actuator. [12] Electric bicycle derailleur control system according to claim 11, wherein the control device is further configured to control the electric actuator to move the chain guide according to a current value of the actuator detected by the current sensor, such that a displacement amount of the chain guide varies based on the detected current value of the electric actuator. [13] Electric bicycle derailleur control system according to any one of claims 1 to 7, wherein the detection device comprises a torque sensor configured to measure a torque of a bicycle component. [14] Electric bicycle derailleur control system according to claim 13, wherein the bicycle component comprises at least one of a crank axle shaft, a crank arm, a pedal and a rear hub. [15] Electric bicycle derailleur control system, comprising: a derailleur comprising a chain guide to move a bicycle chain and an electrical actuator that is effectively coupled to the chain guide to move the chain guide; a detection device designed to detect information regarding a reaction force of the bicycle chain; and a control device configured to control the electrical actuator such that the chain guide is moved from a rest position to a first switching position when the detected information indicates that a detected chain reaction force is less than a first predetermined amount, and such that the chain guide is moved from the rest position to a second switching position, which is further away from the rest position than the first switching position, when the detected information indicates that the detected chain reaction force is greater than or equal to the first predetermined amount. [16] Electric bicycle derailleur control system, comprising: a derailleur comprising a chain guide to move a bicycle chain and an electrical actuator that is effectively coupled to the chain guide to move the chain guide; a torque sensor designed to measure the torque of a bicycle component; and a control device designed to control the electrical actuator to move the chain guide depending on a torque of the bicycle component detected by the torque sensor, such that the chain guide is moved from a rest position to a first shift position when the detected torque is less than a first predetermined amount, and such that the chain guide is moved from the rest position to a second shift position, which is further away from the rest position than the first shift position, when the detected torque is greater than or equal to the first predetermined amount.

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