TWI769332B - Braking devices and braking systems - Google Patents

Abstract

[Subject] To provide a control device for a human-powered vehicle that can appropriately control an assist force in accordance with the traveling conditions of the human-powered vehicle. [Solution] A control device for a human-driven vehicle includes a control unit that controls a motor for assisting the propulsion of the human-driven vehicle. The control unit is configured such that an inclination angle of the human-powered vehicle is equal to or greater than a first predetermined angle, and when a transmission provided in the human-powered vehicle is requested to operate, the assisting force of the motor becomes a first predetermined value The motor is controlled in the following first control state.

Description

Braking devices and braking systems

The present invention relates to a brake device and a brake system provided with the same.

A brake device that is mounted on a human-powered vehicle and driven by electricity is known. For example, the braking device disclosed in Patent Document 1 includes a braking unit for braking a rotating body of a human-driven vehicle, and an actuator for driving the braking unit. [Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2017-30395

[Problems to be solved by the invention]

It is better to brake the rotating body of the human-driven vehicle properly. An object of the present invention is to provide a braking device and a braking system capable of appropriately braking the rotating body of a human-driven vehicle. [means to solve the problem]

A braking device according to a first aspect of the present invention includes: a braking unit that brakes a rotating body of a human-powered vehicle; a first actuator that drives the braking unit through a power transmission medium; and a second actuator A device that drives the first actuator with electric power in response to an input from an operating device. According to the braking device of the first aspect, the second actuator is driven by electric power in response to the input to the operation device, the second actuator is driven by the first actuator, and the first actuator is driven by the power A medium to drive the brakes. Therefore, the rotating body of the human-powered vehicle can be appropriately braked.

Next, in the braking device according to the second aspect of the first aspect, the second actuator is operated by the electric power generated by the power generating mechanism in accordance with the traveling of the human-powered vehicle. According to the braking device of the second aspect, there is no need to store and supply the electric power of the external power source, and the electric power generated by the power generating mechanism can be used to appropriately brake the rotating body of the human-driven vehicle.

Next, in the brake device according to the third aspect of the first or second aspect, the second actuator includes an electric motor. According to the braking device of the third aspect, the rotating body of the human-powered vehicle can be appropriately braked.

Next, in the brake device according to the fourth aspect of any one of the first to third aspects, the first actuator includes a pump that uses the fluid as the power transmission medium. According to the braking device of the fourth aspect, the rotating body of the human-powered vehicle can be appropriately braked.

Next, in the braking device according to the fifth aspect of any one of the first to fourth aspects, the braking portion includes a caliper that clamps the rotating body. According to the braking device of the fifth aspect, the rotating body of the human-powered vehicle can be appropriately braked.

Next, in the braking device according to the sixth aspect of the first or second aspect, the second actuator includes an electric motor, the first actuator includes a pump that uses a fluid as the power transmission medium, and the pump , containing the main piston driven by the aforementioned electric motor. According to the braking device of the sixth aspect, the rotating body of the human-powered vehicle can be braked appropriately using the fluid.

Next, in the braking device according to the seventh aspect of the sixth aspect, the braking portion includes a caliper that clamps the rotating body, and the caliper includes a caliper body, a plurality of driven pistons provided on the caliper body, and a caliper provided on the caliper body. The caliper body is a flow path for supplying hydraulic pressure to the plurality of slave pistons in accordance with the movement of the master piston. According to the braking device of the seventh aspect, since the driven piston and the flow path are provided in the caliper body, the braking device can be easily constituted.

Next, in the brake device according to the eighth aspect of the seventh aspect, the pump and the electric motor are provided in the caliper body. According to the brake device of the eighth aspect, the brake device can be easily constructed.

Next, the brake device according to the ninth aspect of the eighth aspect further includes a first speed change mechanism for transmitting the rotation of the electric motor to the main piston, wherein the first speed change mechanism is provided on the caliper body. According to the braking device of the ninth aspect, the rotation of the electric motor can be shifted and transmitted to the main piston.

In the brake device according to the tenth aspect of the ninth aspect, the first speed change mechanism is a speed reduction mechanism. According to the braking device of the tenth aspect, the rotation of the electric motor can be decelerated and transmitted to the main piston.

Next, the brake device according to the eleventh aspect of any one of the seventh to tenth aspects further includes a reservoir connected to the pump and provided in the caliper body. According to the braking device of the eleventh aspect, the hydraulic pressure can be more appropriately supplied to the slave piston.

Next, the brake device according to the twelfth aspect of any one of the seventh to eleventh aspects further includes a second speed change mechanism that changes the moving speed of the slave piston. According to the braking device of the twelfth aspect, the moving speed of the slave piston can be appropriately changed.

In the brake device according to the thirteenth aspect of the twelfth aspect, the second speed change mechanism changes the moving speed of the slave piston by changing the moving speed of the master piston. According to the brake device of the thirteenth aspect, the moving speed of the driven piston can be easily changed.

Next, in the brake device according to the 14th aspect of the twelfth aspect, the second speed change mechanism changes the moving speed of the slave piston by changing the delivery amount of the fluid per unit time of the master piston. According to the brake device of the fourteenth aspect, the moving speed of the driven piston can be easily changed.

A braking system according to a fifteenth aspect of the present invention includes: the braking device according to any one of the first to fourteenth aspects; According to the braking system of the fifteenth aspect, it is not necessary to store and supply the electric power of the external power source, and the electric power generated by the power generating mechanism can be used to appropriately brake the rotating body of the human-driven vehicle.

Next, in the braking system according to the sixteenth aspect of the fifteenth aspect, the power generation mechanism includes at least one of an in-wheel generator, a wheel resistance generator, an auxiliary regeneration mechanism, and a vibration power generation element. According to the braking system of the sixteenth viewpoint, various power generating mechanisms can be applied to the braking system.

Next, the braking system according to the seventeenth aspect of the fifteenth or sixteenth aspect further includes a power storage unit that stores the electric power from the power generating mechanism. According to the braking system of the seventeenth aspect, even in a situation where the power from the power generating mechanism is insufficient, the power stored in the power storage unit can be used to appropriately brake the rotating body of the human-powered vehicle.

Next, in the braking system according to the eighteenth aspect of the seventeenth aspect, the power storage unit includes a battery. According to the braking system of the eighteenth aspect, the power storage unit can be easily configured.

Next, in the braking system according to the nineteenth aspect of the seventeenth or eighteenth aspect, the power storage unit is configured to be capable of being charged by an external power source other than the power generating mechanism. According to the braking system of the nineteenth aspect, sufficient electric power can be stored in the power storage unit.

Next, in the brake system according to the twentieth aspect of any one of the seventeenth to nineteenth aspects, the second actuator is operated by the electric power from the power storage unit. According to the braking system of the 20th aspect, the rotating body of the human-powered vehicle can be appropriately braked using the electric power stored in the power storage unit.

The brake system according to the 21st aspect of any one of the 15th to 20th aspects described above further includes the aforementioned operating device. According to the braking system of the twenty-first aspect, the rotating body of the human-powered vehicle can be appropriately braked in response to the input from the operating device.

Next, the brake system according to the 22nd aspect of any one of the 15th to 21st aspects, further includes a control unit that controls the brake device in response to an input to the operation device. According to the braking system of the 22nd viewpoint, the rotating body of the human-powered vehicle can be appropriately braked in response to the input to the operation device.

Next, the brake system according to the twenty-third aspect of any one of the seventh to fourteenth aspects includes an actuator control device that is provided in the caliper body and that controls the first actuator. According to the braking system of the 23rd viewpoint, the braking device can be easily constructed.

Next, in the brake system according to the 24th aspect of the 23rd aspect, the actuator control device is configured to be capable of wireless communication with an external device. According to the braking system of the 24th viewpoint, the convenience can be improved.

Next, in the braking system according to the 25th aspect of the aforementioned 24th aspect, the aforementioned external device includes the aforementioned operating device. According to the braking system of the twenty-fifth aspect, it is possible to communicate with the operating device appropriately. [Effect of invention]

According to the braking device and the braking system of the present invention, the rotating body of the human-powered vehicle can be properly braked.

(First Embodiment) Referring to Fig. 1 , a description will be given of a human-powered vehicle A including a braking system 10. Human-powered vehicle A, including braking system 10. Here, the human-powered vehicle refers to a vehicle that uses human power at least partially as a driving force for traveling, and includes a vehicle in which the human power is assisted by an electric motor. Vehicles that only use a driving force other than human power are not included in human-powered vehicles. In particular, vehicles that only use an internal combustion engine as the driving force are not included in human-driven vehicles. Usually, in the case of human-driven vehicles, it is preset as a small light-duty vehicle, and is preset as a vehicle that does not require a driver's license for driving on the road. The human-powered vehicle A shown in the figure is a bicycle (e-bike) that is supplementarily driven by electric power. More specifically, the illustrated human-powered vehicle A is an everyday bicycle. The human-powered vehicle A further includes: a frame A1, a front fork A2, a front wheel A3, a rear wheel A4, a handle A5, and a transmission mechanism B.

Transmission mechanism B, including: crank mechanism C, front sprocket D1, rear sprocket D2, and wheel chain D3. The crank mechanism C includes a crank shaft C1, a pair of crank arms C2, and a pair of pedals C3. A pair of pedals C3 is rotatably attached to the front end of the crank arm C2.

The front sprocket D1 is provided in the crank assembly C so as to rotate integrally with the crank shaft C1. The rear sprocket D2 is the hub A6 provided on the rear wheel A4. The wheel chain D3 is wound on the front chain wheel D1 and the rear chain wheel D2. The driving force applied to the pedal C3 by the rider of the human-powered vehicle A is transmitted to the rear wheel A4 through the front sprocket D1, the wheel chain D3, and the rear sprocket D2.

The human-powered vehicle A further includes an electric assistance unit E. The electric assistance unit E operates to assist the propulsion force of the human-powered vehicle A. The electric assist unit E operates, for example, in accordance with the driving force applied to the pedal C3. The electric auxiliary unit E includes an electric motor E1. The electric auxiliary unit E is driven by the electric power supplied from the battery BT mounted on the human-powered vehicle A. As shown in FIG.

The braking system 10 includes a pair of braking devices 12 . In this embodiment, the brake device 12 is a disc brake device for braking the rotating body F of the human-powered vehicle A. As shown in FIG. The rotating body F is the disc brake rotor F1 provided on the front wheel A3 and the rear wheel A4 of the human-powered vehicle A, respectively. One of the braking devices 12 is provided corresponding to the front wheel A3, for example. The other braking device 12 is provided corresponding to the rear wheel A4, for example. A pair of brake devices 12 have the same structure as each other. The braking device 12 can also be a rim braking device. In this case, the rotating body F is the rim F2.

The braking device 12 includes: a braking unit 14 that brakes the rotating body F of the human-powered vehicle A; a first actuator 18 that drives the braking unit 14 via a power transmission medium 16; and a second actuator 20 , which drives the first actuator 18 . The braking portion 14 includes a caliper that clamps the rotating body F. The first actuator 18 and the second actuator 20 are provided, for example, in any one of the frame A1 , the front fork A2 , and the braking portion 14 . In this embodiment, in the braking device 12 corresponding to the front wheel A3, the first actuator 18 and the second actuator 20 are the fork A8 (the fork on the inner side of the drawing in FIG. 1 ) provided on the front fork A2. Furthermore, in the brake device 12 corresponding to the rear wheel A4, the first actuator 18 and the second actuator 20 are provided on the seat support portion A9 of the frame A1 (the seat support portion on the inner side of the drawing in FIG. 1).

The brake system 10 further includes an operation device 22 and a control unit 24 (see FIG. 2 ). The operation device 22 is provided on the left side of the handle A5 and the right side of the handle A5 with respect to the center plane of the human-powered vehicle A, respectively. Each of the pair of operating devices 22 includes an operating lever 22A. The control unit 24 controls the braking device 12 in response to the input to the operating device 22 . The control unit 24 is a CPU (Central Processing Unit) or an MPU (Micro Processing Unit). In this embodiment, the control unit 24 controls the one braking device 12 in response to the operation of the operating lever 22A of the one operating device 22 , and controls the other braking device in response to the operation of the operating lever 22A of the other operating device 22 . 12. A separate control unit 24 may be provided for each operating device 22 to control each braking device 12 . In addition, each braking device 12 may be actuated in response to each operation of the pair of operating devices 22 . In this case, the ratio of the braking force of each brake device 12 operated by one operating device 22 may be different from the ratio of the braking force of each brake device 12 operated by the other operating device 22 .

As shown in FIG. 2 , the braking system 10 further includes a power generation mechanism 26 that generates electricity as the human-powered vehicle A travels, and a power storage unit 28 that stores the power from the power generation mechanism 26 . The power generation mechanism 26 is configured to supply electric power to various electrical components and the power storage unit 28 constituting the brake system 10 . Various electrical components constituting the brake system 10 include, for example, the second actuator 20 and the control unit 24 . The power storage unit 28 includes a storage battery. The power storage unit 28 is configured to supply electric power to various electrical components constituting the brake system 10 . The power storage unit 28 is configured so that it can also be charged by an external power source EP other than the power generating mechanism 26 .

The power generation mechanism 26 includes at least one of a hub generator 26A, a wheel resistance generator 26B, an auxiliary regeneration mechanism 26C, and a vibration power generation element 26D. The hub generator 26A is provided on at least one of the hub A7 (see FIG. 1 ) of the front wheel A3 and the hub A6 of the rear wheel A4. The wheel resistance generator 26B is provided on the frame A1 and the front fork A2 so as to be able to contact at least one of the front wheel A3, the rim F2 of the front wheel A3, the rear wheel A4, and the rim F2 of the rear wheel A4 at least one party. The auxiliary regeneration mechanism 26C is constituted by the electric motor E1 of the electric assist unit E, for example. The vibration power generating element 26D is provided in a portion where the front wheel A3 and the rear wheel A4 are easily affected by vibration from the ground (not shown). The vibration power generating element 26D is provided on at least one of the frame A1 and the front fork A2.

The second actuator 20 drives the first actuator 18 by electric power in response to an input to the operation device 22 . The second actuator 20 is operated by the electric power generated by the power generating mechanism 26 as the human-powered vehicle A travels. The second actuator 20 is operated by the electric power from the power storage unit 28 . In this embodiment, the second actuator 20 is operated by at least one of the power generated by the power generating mechanism 26 and the power stored in the power storage unit 28 to drive the first actuator 18 . The second actuator 20 includes an electric motor 20A. In addition, the second actuator 20 includes a speed changer (not shown in the figure) for changing the speed (deceleration or acceleration) of the rotation of the electric motor 20A.

The first actuator 18 includes a pump 18A and uses the liquid as the power transmission medium 16 . In this embodiment, the power transmission medium 16 is hydraulic oil. In this embodiment, by operating the electric motor 20A of the second actuator 20 , the pump 18A is driven, and the hydraulic pressure of the hydraulic oil in the power transmission medium 16 is applied to the braking portion 14 . Thereby, the brake part 14 of the caliper presses at least one friction member (not shown) to the rotating body F of the human-powered vehicle A, and the rotating body F is braked.

The control unit 24 controls the electric motor 20A to operate the corresponding second actuator 20 in response to an input to the operating device 22 . In this embodiment, the electric motor 20A of the second actuator 20 is operated by at least one of the power generated by the power generating mechanism 26 and the power stored in the power storage unit 28 to drive the first actuator 18 . Pump 18A.

(Second Embodiment) Referring to FIG. 3, a brake system 100 according to a second embodiment will be described. About the brake system 100 of 2nd Embodiment, the same code|symbol as 1st Embodiment is attached|subjected about the structure common to 1st Embodiment, and a repeated description is abbreviate|omitted.

The braking system 100 of the second embodiment includes a braking device 112 and an actuator control device 130 . The braking device 112 includes: a braking unit 114 that brakes the rotating body F of the human-powered vehicle A; a first actuator 18 that drives the braking unit 114 via the power transmission medium 16; and a second actuator 20 , which drives the first actuator 18 .

The second actuator 20 includes an electric motor 20A. The first actuator 18 includes a pump 18A and uses the fluid as the power transmission medium 16 . The pump 18A includes a main piston 132 driven by the electric motor 20A. Therefore, the rotating body F of the human-powered vehicle A can be appropriately braked using the power transmission medium 16 , which is a fluid such as hydraulic oil.

The pump 18A further includes a cylinder 134 that accommodates the main piston 132 , and a piston moving portion 136 that reciprocates the main piston 132 in the cylinder 134 . The piston moving part 136 converts the rotational motion of the output shaft 20AX of the electric motor 20A into linear motion. The piston moving part 136 includes a ball screw 136A and a moving body 136B. The ball screw 136A is arranged so that the central axis thereof coincides with the central axis of the main piston 132 . A ball screw 136A is inserted into the movable body 136B. One end of the master piston 132 is connected to the movable body 136B. By transmitting the output of the electric motor 20A to the ball screw 136A, the ball screw 136A is rotated in the first direction or the second direction. The movable body 136B is guided by a plurality of guide shafts, and moves linearly with the rotation of the ball screw 136A. When the ball screw 136A rotates in the first direction, the movable body 136B and the main piston 132 move in the direction of approaching the braking portion 114 . Therefore, the volume in the cylinder block 134 is reduced, and the hydraulic pressure of the hydraulic oil is supplied to the brake portion 114 . When the ball screw 136A rotates in the second direction, the movable body 136B and the main piston 132 move in a direction away from the braking portion 114 . Therefore, the volume in the cylinder block 134 is increased, and the hydraulic pressure of the hydraulic oil supplied to the braking portion 114 is decreased.

The braking portion 114 includes a caliper 138 that clamps the rotating body F. The caliper 138 includes a caliper body 140 , a plurality of slave pistons 142 provided in the caliper body 140 , and a flow path 144 provided in the caliper body 140 for supplying hydraulic pressure to the plurality of slave pistons 142 along with the movement of the master piston 132 . . The driven piston 142 and the flow path 144 are provided in the caliper body 140 , so that the braking device 112 can be easily configured. The pump 18A and the electric motor 20A are provided in the caliper body 140 . Therefore, the braking device 112 can be easily constructed.

The slave piston 142 includes a first slave piston 142A and a second slave piston 142B. The first driven piston 142A is partially accommodated in the first chamber 140A provided in the caliper body 140 . The second driven piston 142B is partially accommodated in the second chamber 140B provided in the caliper body 140 .

The first driven piston 142A and the second driven piston 142B are urged in a direction away from the disc brake rotor F1 by a return spring (not shown). The first driven piston 142A is provided so as to face one of the surfaces of the disc brake rotor F1 through a first brake pad (not shown). The first driven piston 142A is supplied with a predetermined hydraulic pressure by the pump 18A, and thereby moves toward one of the surfaces of the disc brake rotor F1 against the urging force of the return spring. The second driven piston 142B is provided so as to face the other surface of the disc brake rotor F1 through a second brake pad (not shown). The second driven piston 142B and the second brake pad are provided so as to face the first driven piston 142A and the first brake pad through the disc brake rotor F1. The second driven piston 142B is moved toward the other surface of the disc brake rotor F1 against the urging force of the return spring by supplying a predetermined hydraulic pressure from the pump 18A. That is, the first driven piston 142A and the second driven piston 142B brake the disc brake rotor F1 through the first brake pad and the second brake pad.

The flow channel 144 includes a first flow channel 144A and a second flow channel 144B. The first flow path 144A connects the cylinder 134 and the first chamber 140A. The second flow path 144B connects the first chamber 140A and the second chamber 140B.

The brake device 112 is further provided with a first speed change mechanism 146 which changes the rotation of the electric motor 20A and transmits it to the master piston 132 . Therefore, the rotation of the electric motor 20A can be shifted and transmitted to the main piston 132 . The first speed change mechanism 146 is provided in the caliper body 140 . The first speed change mechanism 146 is a speed reduction mechanism. Therefore, the rotation of the electric motor 20A can be decelerated and transmitted to the main piston 132 . The first speed change mechanism 146 includes a first gear 146A and a second gear 146B. The first gear 146A is connected to the output shaft 20AX of the electric motor 20A. The first gear 146A meshes with the second gear 146B. The second gear 146B has a longer diameter than the first gear 146A. The second gear 146B is connected to the ball screw 136A. The rotation of the output shaft 20AX of the electric motor 20A is decelerated by the first speed change mechanism 146 and transmitted to the ball screw 136A to rotate the ball screw 136A in the first direction or the second direction.

The brake device 12 is further provided with: a reservoir 148 provided in the caliper body 140 so as to be connected with the pump 18A. The fluid reservoir 148 is provided to absorb the change in the passage volume due to the volume change of the hydraulic oil, that is, the power transmission medium 16 or the wear of the brake pad. Therefore, the driven piston 142 can be stably arranged.

The actuator control device 130 is provided in the caliper body 140 and controls the first actuator 18 . Therefore, the braking device 112 can be easily constructed. The actuator control device 130 is configured to be able to communicate wirelessly with an external device. Therefore, convenience is improved. The external device includes an operation device 22 (see FIG. 1 ). The actuator control device 130 controls the electric motor 20A to operate the second actuator 20 in response to an input to the operation device 22 . In this embodiment, the electric motor 20A of the second actuator 20 is operated by at least one of the power generated by the power generating mechanism 26 and the power stored in the power storage unit 28 to drive the first actuator 18 . Pump 18A.

(Third Embodiment) Referring to FIG. 4, a brake system 200 according to a third embodiment will be described. About the brake system 200 of 3rd Embodiment, about the structure common to 2nd Embodiment, the same code|symbol as 2nd Embodiment is attached|subjected, and an overlapping description is abbreviate|omitted.

The braking system 200 of the third embodiment includes a braking device 212 . The brake device 212 further includes a second speed change mechanism 250 that changes the moving speed of the driven piston 142 . The braking device 212 preferably includes a moving mechanism 262 for moving the second speed change mechanism 250 , and a biasing member 270 for connecting the second speed change mechanism 250 and the caliper body 240 .

The second transmission mechanism 250 changes the moving speed of the slave piston 142 by changing the moving speed of the master piston 132 . The second speed change mechanism 250 includes a housing 250A, a first gear 252 , a second gear 254 , a third gear 256 , a fourth gear 258 , and a rotating shaft 260 . The casing 250A accommodates the first gear 252 , the second gear 254 , the third gear 256 , the fourth gear 258 , and the rotating shaft 260 . The first gear 252 is connected to the output shaft 20AX of the electric motor 20A. The second gear 254 meshes with the first gear 252 . The second gear 254 has a longer diameter than the first gear 252 . The second gear 254 has a rotating shaft 260 inserted therein. The second gear 254 rotates integrally with the rotating shaft 260 . The third gear 256 has a rotating shaft 260 inserted therein. The third gear 256 is a gear with a smaller diameter than the second gear 254 . The third gear 256 rotates integrally with the rotating shaft 260 . The fourth gear 258 meshes with the third gear 256 . The fourth gear 258 has a longer diameter than the third gear 256 . The fourth gear 258 is connected to the ball screw 136A. The rotation of the output shaft 20AX of the electric motor 20A is transmitted to the ball screw 136A through the first gear 252 , the second gear 254 , the third gear 256 , and the fourth gear 258 .

The movement mechanism 262 is transmitted in the direction of approaching the driven piston 142 by transmitting the rotation of the electric motor 20A to the housing 250A and the member accommodated in the housing 250A. The moving mechanism 262 includes a cam member 264 , a plurality of balls 266 , and a ball arrangement table 268 .

The cam member 264 is, for example, in the shape of a disk. A rotation shaft 260 is inserted into the cam member 264 . The cam member 264 rotates integrally with the rotating shaft 260 . The cam member 264 is in contact with the housing 250A. The cam member 264 includes a cam surface 264A that is in contact with the plurality of balls 266 . The cam surface 264A is, for example, a surface whose depth is changed along the circumferential direction of the cam member 264 . In one example, the cam surface 264A is a surface whose depth becomes shallow along the circumferential direction of the cam member 264 . The plurality of balls 266 are arranged on the ball arrangement table 268 so as to be in contact with the cam surface 264A. The ball arrangement base 268 is fixed to the caliper body 240 . The pushing member 270 pushes the housing 250A in a direction away from the driven piston 142 .

The rotation of the electric motor 20A is transmitted to the cam member 264 through the first gear 252 , the second gear 254 , and the rotating shaft 260 to rotate the cam member 264 , and the position of the cam surface 264A in contact with the plurality of balls 266 changes. . When the deepest surface among the cam surfaces 264A is in contact with the plurality of balls 266, the distance between the cam member 264 and the ball arrangement table 268 becomes the shortest. When the shallowest surface among the cam surfaces 264A is in contact with the plurality of balls 266, the distance between the cam member 264 and the ball arrangement table 268 becomes the farthest. As the cam member 264 rotates, the depth of the cam surface 264A in contact with the plurality of balls 266 becomes shallower, and the cam member 264 moves away from the ball arrangement table 268 accordingly. Therefore, the cam member 264 accommodates the housing 250A and the housing 264 . The member of 250A is pushed away from the ball arrangement table 268 . Therefore, the master piston 132 accommodated in the housing 250A moves in the direction of approaching the slave piston 142 , reducing the volume in the cylinder 134 and supplying the hydraulic pressure of the hydraulic oil to the braking portion 114 . When the movement of the slave piston 142 is completed with the rotation of the cam member 264, as in the case of the second embodiment, the master piston 132 is brought closer to the slave piston by the ball screw 136A rotating in the first direction. Move in the direction of 142. Therefore, the volume in the cylinder block 134 is further reduced, and the hydraulic pressure of the hydraulic oil is supplied to the braking portion 114 . When the electric motor 20A is driven to rotate the ball screw 136A in the second direction, the cam member 264 is rotated to increase the depth of the cam surface 264A in contact with the plurality of balls 266 . The casing 250A and the member accommodated in the casing 250A are moved in the direction of approaching the ball arrangement table 268 by the urging force of the urging member 270 .

(Fourth Embodiment) The braking system 300 may be constituted by the braking device 312, which is provided with a second speed change mechanism 350 as shown in FIG. 5 instead of the second speed change mechanism 250 of the third embodiment. The second speed change mechanism 350 changes the moving speed of the driven piston 142 by changing the delivery amount of the fluid per unit time. The second transmission mechanism 350 includes a primary piston 352 , a secondary piston 354 , a first urging member 356 , and a second urging member 358 . The main piston 352 of the fourth embodiment is driven by the electric motor 20A, for example, through the first speed change mechanism 146 and the piston moving part 136 shown in the second embodiment.

The main piston 352 is inserted into the hole 354A provided in the sub-piston 354 . The primary piston 352 is arranged to be movable relative to the secondary piston 354 . The first urging member 356 urges the primary piston 352 away from the secondary piston 354 . The first urging member 356 is, for example, a coil spring. The second pushing member 358 pushes the secondary piston 354 away from the caliper body 340 . The second urging member 358 is, for example, a disc spring. The urging force of the second urging member 358 is smaller than the urging force of the first urging member 356 .

The caliper body 340 includes a first groove 342 , a second groove 344 , and a stopper 346 . The first groove 342 has a larger volume than the second groove 344 . The second groove 344 is connected to the first groove 342 . The stopper 346 is provided on the side wall 342A of the first groove 342 . The stopper 346 restricts the movement of the sub-piston 354 in a direction away from the second groove 344 . The sub-piston 354 moves between the stopper 346 and the bottom 342B of the first groove 342 .

The ball screw 136A is rotated in the first direction or the second direction by transmitting the output of the electric motor 20A (see FIG. 3 ) to the ball screw 136A (see FIG. 3 ). When the ball screw 136A is rotated in the first direction, the movable body 136B (see FIG. 3 ) and the main piston 352 move in the direction of approaching the braking portion 114 (see FIG. 3 ). When the main piston 352 moves in the direction of approaching the braking portion 114 , the sub-piston 354 connected to the main piston 352 via the first biasing member 356 resists the biasing force of the second biasing member 358 and approaches the braking portion 114 direction move. Therefore, the volume in the first groove 342 is reduced, and the hydraulic pressure of the hydraulic oil is supplied to the brake portion 114 . When the sub-piston 354 is in contact with the bottom 342B of the first groove 342 , the main piston 352 is further moved in the direction of approaching the braking portion 114 against the urging force of the first urging member 356 . Therefore, the volume in the second groove 344 is reduced, and the hydraulic pressure of the hydraulic oil is further supplied to the brake portion 114 .

(Modification) The description of the above-mentioned embodiment is an example of possible forms of the brake device and the brake system of the present invention, and is not intended to limit the form. The brake device and the brake system of the present invention may be, for example, a modification of the above-described embodiment shown below, or a form obtained by combining at least two modifications that do not contradict each other. In the following modified examples, the same reference numerals as those in the embodiment are attached to the same parts as those of the embodiment, and the description thereof will be omitted.

・The structure of the power storage unit 28 can be arbitrarily changed. In the first example, the power storage unit 28 includes a capacitor (not shown). In the second example, the power storage unit 28 is configured so that it cannot be charged by the external power source EP.

・The structure of the power generating mechanism 26 can be arbitrarily changed. In the first example, the power generating mechanism 26 supplies electric power only to the power storage unit 28 . According to this example, all of the electric power generated by the power generating mechanism 26 is stored in the power storage unit 28 , and the second actuator 20 is operated only by the electric power stored in the power storage unit 28 . In the second example, the power generating mechanism 26 supplies electric power only to various electrical components constituting the braking system 10 . According to this example, the power storage unit 28 may be omitted from the braking system 10 .

・The structures of the braking devices 12, 112, 212, and 312 can be arbitrarily changed. As shown in FIG. 2 , the first actuator 18 is a cable control mechanism 18B using a cable (not shown) as the power transmission medium 16 . An example of the cable control mechanism 18B is a rack and pinion mechanism. The cable control mechanism 18B of the first actuator 18 is driven by operating the second actuator 20 , and the braking portion 14 is driven by displacing the power transmission medium 16 with respect to the cable control mechanism 18B. Thereby, the rotating body F of the human-powered vehicle A is braked by the braking portion 14 . For example, the braking device 12 is configured to drive the braking portion 14 by driving the cable control mechanism 18B, thereby causing the power transmission medium 16 to be pulled toward the braking portion 18B side. In this case, a one-way clutch is provided in the rack and pinion mechanism, and an elastic member such as a spring (not shown) is provided in the braking portion 14, and after the operation of the operating device 22, the power transmission medium 16, that is, a cable The wire is returned to the braking portion 14 side.

・The structures of the braking systems 10, 100, 200, and 300 can be arbitrarily changed. In one example, at least one of the power generating mechanism 26 and the power storage unit 28 is omitted from the braking system 10 . According to this example, the second actuator 20 drives the first actuator 18 by the electric power supplied from the battery BT.

・The structure of the human-powered vehicle A can be changed arbitrarily. In one example, the electric assistance unit E is omitted from the human-powered vehicle A. According to this example, the auxiliary regeneration mechanism 26C is omitted from the power generation mechanism 26 .

・The type of human-powered vehicle A can be changed arbitrarily. In the first example, the type of the human-powered vehicle A is a road bike, a mountain bike, a hiking bike, or a hybrid bike. In the second example, the type of human-powered vehicle A is a scooter.

10, 100, 200, 300‧‧‧Brake system 12, 112, 212, 312‧‧‧Brake device 14, 114‧‧‧Brake part 16‧‧‧Power transmission medium 18‧‧‧First actuator 18A‧ ‧‧Pump 20‧‧‧Second actuator 20A‧‧‧Electric motor 22‧‧‧Operating device 24‧‧‧Control unit 26‧‧‧Generating mechanism 26A‧‧‧Hub generator 26B‧‧‧Wheel resistance generator Motor 26C‧‧‧Auxiliary regeneration mechanism 26D‧‧‧Vibration power generation element 28‧‧‧Power storage unit 130‧‧‧Actuator control device 132, 352‧‧‧Main piston 138‧‧‧Caliper 140, 240, 340‧‧ ‧Caliper body 142‧‧‧Slave piston 144‧‧‧Flow path 146‧‧‧First speed change mechanism 148‧‧‧Reservoir 250, 350‧‧‧Second speed change mechanism A‧‧‧Manual drive vehicle EP‧ ‧‧External power supply F‧‧‧Rotating body

FIG. 1 is a side view of a human-powered vehicle equipped with the braking system of the first embodiment. FIG. 2 is a block diagram of the braking system of FIG. 1 . Fig. 3 is a schematic diagram of the braking system of the second embodiment. Fig. 4 is a schematic diagram of the braking system of the third embodiment. Fig. 5 is a schematic diagram of the braking system of the fourth embodiment.

10‧‧‧Brake system

12‧‧‧Brakes

14‧‧‧Brake part

16‧‧‧Power Transmission Media

18‧‧‧First Actuator

18A(18B)‧‧‧Pump (cable control mechanism)

20‧‧‧Second actuator

20A‧‧‧electric motor

22‧‧‧Operating device

24‧‧‧Control Department

26‧‧‧Generators

26A‧‧‧wheel hub generator

26B‧‧‧Wheel resistance generator

26C‧‧‧Auxiliary regeneration mechanism

26D‧‧‧Vibration power generation element

28‧‧‧Storage Department

EP‧‧‧External Power Supply

F‧‧‧Rotating body

Claims (19)

A braking device comprising: a braking unit that brakes a rotating body of a human-powered vehicle; a first actuator that drives the braking unit through a power transmission medium; and a second actuator that responds to operation The input of the device drives the first actuator by electric power, the second actuator includes an electric motor, the first actuator includes a pump that uses a fluid as the power transmission medium, and the brake unit , including a caliper that clamps the rotating body, the caliper includes a caliper body, the pump and the electric motor are provided in the caliper body, the pump includes a master piston, the caliper body is provided with a plurality of driven pistons, the aforesaid The moving direction of the master piston is different from the moving direction of the plurality of slave pistons. The braking device according to claim 1, wherein the second actuator is operated by the electric power generated by the power generating mechanism along with the traveling of the human-powered vehicle. The braking device according to claim 1 or 2, wherein the electric motor The whole is accommodated inside the casing of the aforementioned caliper body. The braking device according to claim 1 or 2, wherein the main piston is driven by the electric motor. The brake device according to claim 4, wherein the caliper includes: the caliper body, the plurality of slave pistons provided on the caliper body, and the caliper body provided on the caliper body and corresponding to the movement of the master piston. A flow path for supplying hydraulic pressure to a plurality of slave pistons. The braking device according to claim 1 or 2, wherein the electric motor is a rotary motor. The braking device according to claim 1 or 2, wherein the moving direction of the master piston is orthogonal to the moving direction of the plurality of slave pistons. The brake device according to claim 1 or 2, wherein the master piston is not arranged on an extension line in the axial direction of the plurality of slave pistons. A braking system comprising: the braking device according to any one of claims 1 to 8; The braking system according to claim 9, wherein the power generating mechanism, It is at least one of a hub generator, a wheel resistance generator, an auxiliary regeneration mechanism, and a vibration power generation element. The braking system according to claim 9 or 10, further comprising: a power storage unit that stores the electric power from the power generation mechanism. The braking system according to claim 11, wherein the power storage unit includes a battery. The braking system according to claim 11, wherein the power storage unit is configured to be chargeable by an external power source other than the power generating mechanism. The braking system according to claim 11, wherein the second actuator is operated by electric power from the power storage unit. The braking system according to claim 9 or 10, further comprising the aforementioned operating device. The braking system according to claim 9 or 10, further comprising a control unit that controls the braking device in response to an input to the operating device. A braking system comprising: the braking device according to any one of claims 1 to 8, An actuator control device that is provided in the caliper body and controls the first actuator. The braking system according to claim 17, wherein the actuator control device is configured to be capable of wireless communication with an external device. The braking system according to claim 18, wherein the external device includes the operating device.

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