DE102018216653A1 - BRAKE DEVICE - Google Patents

Abstract

A versatile brake device 10 includes a bracket 12 mountable to a bicycle frame F, a brake drum 14 rotatably provided on the bracket 12, a friction member 16 configured to contact the brake drum 14, and a slider A brake operating mechanism 18 configured to bring the friction member 16 into contact with the brake drum 14. The brake drum 14 includes a brake member 26 configured to contact the friction member 16, a connecting member 28 connected to a hub H provided on the bicycle frame F, and a clutch mechanism 30 including the brake member 26 and the connecting member 28 connects to allow relative rotation of the brake member 26 and the connecting member 28 in accordance with the relative rotational force generated between the brake member 26 and the connecting member 28.

Description

The present invention relates to a brake device.

JP 2007-62718 A describes an example of a braking device for a bicycle. The brake device is connected via a coupling mechanism with a hub. The clutch mechanism includes a first portion provided in the brake device and a second portion provided in the hub. The brake device and the hub are connected by the first portion and the second portion to relatively rotate in accordance with a relative rotational force generated between the first portion and the second portion.

In the brake device described above, the clutch mechanism can be applied only to a specific hub configured to receive the clutch mechanism. An object of the present invention is to provide a brake device that allows versatile use.

According to the present invention, a brake device includes a bracket that can be mounted on a bicycle frame, a brake drum rotatably provided on the bracket, a friction member configured to be able to contact the brake drum, and a brake operating mechanism is configured to be able to bring the friction element into contact with the brake drum. The brake drum includes a brake member configured to be in contact with the friction member, a link connected to a hub provided on the bicycle frame, and a clutch mechanism connecting the brake member and the link member for relative rotation of the brake member and the connecting member according to the relative rotational force generated between the braking member and the connecting member.

Such a brake device is provided with the clutch mechanism. This allows the application on a versatile hub. In addition, the size of the clutch mechanism is not limited by the size of the hub. This creates a clutch mechanism with the desired capacity.

According to a preferred aspect of the present invention, the brake device may be configured such that the clutch mechanism includes a first member provided on the brake member in a non-rotatable manner, a second member provided on the connector member in a non-rotatable manner, and a biasing member , which connects the first element and the second element, includes. With such a brake device, the biasing member controls the force acting between the first member and the second member and easily obtains a clutch mechanism with the desired capacity.

According to another preferred aspect of the present invention, the brake device may be configured so that the first member is provided on an inner peripheral portion of the brake member. With such a brake device, the space inside the brake element is effectively utilized.

According to another preferred aspect of the present invention, the brake device may further include a support member disposed on the inner peripheral portion of the brake member. An outer peripheral portion of the support member is meshed with the inner peripheral portion of the brake member, and the inner peripheral portion of the support member is interlocked with the first member. With such a braking device, an assembly of the first element and the support member is formed by toothing and the assembly coupled to the brake element. This facilitates the coupling of the first element with the inner peripheral portion of the braking element.

According to another preferred aspect of the present invention, the brake device may be configured so that the second member is provided on an outer peripheral portion of the connecting member. With such a braking device, the second element can be easily connected to the connecting element.

According to another preferred aspect of the present invention, the brake device may be configured so that an inner peripheral portion of the second member is connected to the outer peripheral portion of the connecting member. In such a braking device, the toothing ensures that the second element is stably coupled to the connecting element.

According to another preferred aspect of the present invention, the brake device may be configured such that the clutch mechanism includes the first element multiple times and the second element multiple times. With such a brake device, the first element and the second element in the clutch mechanism are increased in number. This increases the capacity of the clutch mechanism.

According to another preferred aspect of the present invention, the brake device may be configured so that at least one of the first member and the second member has at least one recess opposite to the other of the first member and the second member. In such a brake device, the lubricating oil is held in the recess.

According to another preferred aspect of the present invention, the brake device may be configured so that the recess is a through-hole. With such a braking device, the volume of the recess is increased.

According to another preferred aspect of the present invention, the brake device may be configured to form the recess in the first member. In such a brake device, the first element is configured to be light in weight.

According to another preferred aspect of the present invention, the brake device may be configured so that the biasing member is in relation to the clutch mechanism in the axial direction of the brake drum with respect to the hub. With such a braking device, the exposure of the biasing member and thus the clutch mechanism is limited to the hub.

According to another preferred aspect of the present invention, the brake device may be configured so that at least one of the brake element and the connecting member includes a receiving portion that receives a biasing force of the biasing member by the first member and the second member. In such a braking device, the receiving portion causes a suitable force between the first element and the second element act.

According to another preferred aspect of the present invention, the brake device may be configured so that the receiving portion is provided on the connecting member. With such a braking device, the structure of the braking element is simplified.

According to another preferred aspect of the present invention, the brake device may further include an adjusting mechanism that adjusts a biasing force of the biasing member acting on the first member and the second member. In such a brake device, the adjustment of the force between the first element and the second element allows the adjustment of the clutch mechanism to any capacity.

According to another preferred aspect of the present invention, the brake device may be configured such that the adjustment mechanism includes a second threaded portion bolted to a first threaded portion provided on at least one of the brake member and the connecting member, and the adjustment mechanism adjusts the biasing force of the biasing member according to a length of the second threaded portion, which is bolted to the first threaded portion. In such a brake device, the first threaded portion and the second threaded portion allow easy adjustment of the biasing force of the biasing member and facilitate adjustment of the capacity of the clutch mechanism.

According to another preferred aspect of the present invention, the brake device may further include a seal member that limits the entry of dust into the clutch mechanism. In such a braking device, the sealing element preferably limits the entry of dust into the coupling mechanism.

According to another preferred aspect of the present invention, the brake device may be configured so that the seal member is located between the brake member and the connector. In such a braking device, the dust entry is limited by a gap between the brake element and the connecting element.

According to a further preferred aspect of the present invention, the brake device may be configured so that the connecting element is toothed with the hub. In such a braking device, the toothing of the connecting element and the hub ensures the stability of the integrated rotation.

According to another preferred aspect of the present invention, the brake device may be configured so that the brake element has a friction surface on an inner peripheral portion and the friction element is arranged so that it can contact the friction surface of the brake element. In such a braking device, the friction element is arranged in the interior of the brake element. This effectively uses the space inside the brake element.

According to another preferred aspect of the present invention, the brake device may be configured so that the bicycle frame includes a front fork, and the bracket is configured so that it can be mounted on the front fork. In such a braking device coupled to the front fork fork is versatile.

The brake device according to the present invention allows versatile use.

• 1 eine Vorderansicht mit einer Vorderradgabel und einer Nabe in einem Zustand ist, in dem eine Bremsvorrichtung gemäß einer Ausführungsform montiert ist;
• 2 eine perspektivische Ansicht der in 1 dargestellten Bremsvorrichtung von einer Außenseite der Nabe aus ist;
• 3 eine perspektivische Ansicht der in 1 dargestellten Bremsvorrichtung von der Seite der Nabe aus ist;
• 4 eine Querschnittsansicht entlang der Linie IV-IV in 2 ist; 2;
• 5 eine Querschnittsansicht entlang der Linie V-V in 4 ist;;
• 6 eine perspektivische Explosionsansicht des in 4 dargestellten Kupplungsmechanismus und der Umgebung des Kupplungsmechanismus ist; es handelt sich um eine Explosion;
• 7 eine perspektivische Ansicht eines Bremselements ist, betrachtet von einer gegenüberliegenden Seite von 6; und
• 8 eine perspektivische Ansicht eines Verbindungselements ist, betrachtet von einer gegenüberliegenden Seite von 6.

A more complete appreciation of the invention and many of the attendant advantages will be readily obtained as the same becomes better understood by the following detailed description when taken in conjunction with the accompanying drawings, in which:

• 1 is a front view with a front fork and a hub in a state in which a brake device according to an embodiment is mounted;
• 2 a perspective view of in 1 shown braking device from an outside of the hub is made;
• 3 a perspective view of in 1 is shown braking device from the side of the hub;
• 4 a cross-sectional view along the line IV-IV in 2 is; 2 ;
• 5 a cross-sectional view along the line VV in 4 is ;;
• 6 an exploded perspective view of the 4 illustrated clutch mechanism and the environment of the clutch mechanism is; it is an explosion;
• 7 is a perspective view of a braking element, as viewed from an opposite side of 6 ; and
• 8th is a perspective view of a connecting element, as viewed from an opposite side of 6 ,

Selected embodiments will now be described with reference to the accompanying drawings, wherein like reference numerals designate corresponding or identical elements throughout the several drawings.

A brake device 10 standing at a bicycle frame F is provided, will now be with reference to 1 described. The brake device 10 is on the bicycle frame F and a hub H of the bicycle mounted. The brake device 10 is a so-called roller brake device. The bicycle frame F includes a front fork FA , The hub H is on the bike frame F intended. The hub H is on the front fork FA intended. The hub H includes a hub axle H1 and a hub shell H2 from the hub axle H1 rotatable relative to the hub axle H1 will be carried. The front fork FA is with the two axial ends of the hub H coupled.

As in 2 shown, includes the braking device 10 a bracket 12 , a brake drum 14 , Friction elements 16 (please refer 4 ) and a brake operating mechanism 18 (please refer 4 ).

As in 4 shown, includes the braking device 10 furthermore a support element 20 , an adjustment mechanism 22 and a sealing element 24 ,

As in 1 shown is the bracket 12 on the bicycle frame F mountable. The holder 12 is configured to be on the front fork FA to be mounted. The holder 12 is with a guide 12A provided a mechanical control cable C leads, with which the braking device 10 is pressed. The mechanical control cable C includes an inner cable C1 and an outdoor cable C2 , The outside cable C2 has an end to that with the leadership 12A connected is.

With reference to the 3 and 4 is the brake drum 14 rotatable on the holder 12 arranged. As in 4 shown, includes the brake drum 14 a brake element 26 that is configured to work with the friction elements 16 to be able to contact, a connecting element 28 that with the hub H is connected, and a clutch mechanism 30 , The brake drum 14 also includes a cooling disk 32 attached to an outer peripheral portion of the brake element 26 is provided. The cooling disk 32 undergoes press-fitting, forging, gearing or a combination of these procedures to be integral with the braking element 26 to be turned. On the bracket 12 is a cover 34 attached to the brake drum 14 in the end, that's on the hub H opposite side in the axial direction X partially covered. An axial direction X the brake drum 14 is the direction of the axis of rotation of the hub H ,

The brake element 26 is tubular. The connecting element 28 is tubular. At least part of the connecting element 28 is inside the brake element 26 arranged. The connecting element 28 includes a flange 28A at one end, which is at the side of the hub H in the axial direction X located. The connecting element 28 is at the hub H toothed. In particular, the inner peripheral portion of the connecting element includes 28 gearing 28B , The gears 28B are attached to protrusions that are on an outer peripheral portion of the hub shell H2 are provided. This connects that connecting element 28 with the hub H making it integral with the hub H is rotatable. A construction other than a gear construction can be used as long as the hub H and the connecting element 28 are integrally rotatably connected. The part of an inner peripheral portion of the connecting element 28 closer to the hub H is arranged as the gears 28B in the axial direction X , includes a groove 28C , In the groove 28C is a sealing element 29 intended. The sealing element 29 is in the groove 28C provided and configured to the outer peripheral portion of the hub shell H2 to contact.

At least part of the brake actuation mechanism 18 is inside the brake element 26 arranged and located on the side of the connecting element 28 opposite the hub H in the axial direction X , The brake element 26 includes an inner peripheral portion which is a friction surface 26A Are defined. The friction surface 26A is defined by the part of the inner peripheral portion of the braking element 26 , the brake actuation mechanism 18 is facing. As in 7 shown, includes the friction surface 26A a variety of grooves that extend in the circumferential direction S the brake drum 14 extend. Thus, the friction elements 16 and the friction surface 26A in several places in linear contact with each other.

As in the 4 and 5 is shown, is the brake actuation mechanism 18 configured so that the friction elements 16 with the brake drum 14 can be in contact. The brake actuation mechanism 18 is a so-called Rollenbremsbetätigungsmechanismus. The brake actuation mechanism 18 includes a rotor 36 , a cam element 38 , Roll 40 and a holder 42 , The rotor 36 is on the bracket 12 mounted so that it respects the bracket 12 is rotatable. The rotor 36 is with a cable holder 36A (please refer 2 ), at which one end of the inner cable C1 is attached.

The cam element 38 is with the rotor 36 coupled, making it integral with the rotor 36 is rotatable. As in 5 shown, is the cam member 38 disk-shaped. The cam element 38 includes a variety of recesses 38A provided in an outer peripheral portion and cam surfaces 38B between two adjacent recesses 38A are provided. Each cam surface 38B extends outward in the radial direction D the brake drum 14 on the one hand in the circumferential direction S the brake drum 14 (clockwise based on 5 ). In the non-braking state are the roles 40 at the outer peripheral portion of the rotor 36 in places that the recesses 38A correspond. The holder 42 keeps the roles 40 rotatable. Furthermore, the holder stops 42 the roles 40 in the radial direction D movable. The friction elements 16 are located on the outside of the rollers 40 in the radial direction D , In this embodiment, the brake operating mechanism includes 18 three friction elements 16 and six roles 40 , Furthermore, in this embodiment, a friction element 16 for every two roles 40 intended. Accordingly, each friction element 16 configured to work with a variety of (in this case two) roles 40 to get in touch.

The friction elements 16 act as brake shoes and are configured with the brake drum 14 to get in touch. The friction elements 16 are arranged so that they are the friction surface 26A of the braking element 26 can touch. More precisely, the friction surface is located 26A the brake drum 14 on the outside of the friction elements 16 in the radial direction D , The operation of an actuator (brake lever), which is not shown in the drawings, pulls the inner cable C1 and turns the rotor 36 for rotating the cam element 38 , The cam element 38 moves relative to the rollers 40 to the other side in the circumferential direction S (counterclockwise with respect to the illustration in 5 ). This will be the roles 40 on the cam surfaces 38B of the cam element 38 in the radial direction D pushed up. The roles 40 push the friction elements 16 against the friction surface 26A of the braking element 26 , The between the friction elements 16 and the friction surface 26A Heat generated by the cooling disk 32 from the brake device 10 dissipated.

With reference to the 4 and 6 connects the clutch mechanism 30 the brake element 26 and the connecting element 28 to a relative rotation between the brake element 26 and the connecting element 28 according to the between the brake element 26 and the connecting element 28 To allow generated relative torque. The coupling mechanism 30 is between the inner peripheral portion of the braking element 26 and the outer peripheral portion of the connecting element 28 intended. The coupling mechanism 30 is closer to the hub H arranged as the brake actuating mechanism 18 in the axial direction X ,

The coupling mechanism 30 includes a first element 44 that in terms of the braking element 26 is not rotatable, a second element 46 that in relation to the connecting element 28 is not rotatable, and a biasing member 48 which is the first element 44 and the second element 46 connects with each other. The coupling mechanism 30 includes a variety of the first elements 44 and a plurality of the second elements 46 , In this embodiment, the clutch mechanism includes 30 three first elements 44 and three second elements 46 , Preferably, the first elements 44 and the second elements 46 the same number of. The first elements 44 are each disk-shaped. The second elements 46 are each disk-shaped. The first elements 44 and the second elements 46 are stacked alternately.

The first elements 44 are at the inner peripheral portion of the braking element 26 intended. In particular, the first elements 44 at an inner peripheral portion 26B of the braking element 26 with the intermediate support element 20 provided, which at the inner peripheral portion 26B of the braking element 26 is provided. The outer peripheral portion of the support member 20 is with the inner peripheral portion 26B of the braking element 26 connected. An inner peripheral portion of the support member 20 is at the first elements 44 toothed. The second elements 46 are at an outer peripheral portion of the connecting element 28 intended. The inner peripheral portions of the second elements 46 are with the connecting element 28 toothed.

At least one of the first element 44 and second element 46 includes at least one recess 50 in one face, the other from the first element 44 and second element 46 is facing. The recess 50 is in every first element 44 educated. The recess 50 is a through hole. One of the first elements 44 includes a variety of recesses 50 in the circumferential direction S , The first elements 44 are arranged so that the phases of the recesses 50 in the circumferential direction S in each of the first elements 44 are compliant. In other words, the first elements 44 be through the support element 20 so supported that the recesses 50 in the axial direction X are aligned. The recesses 50 grasp oil. The lubricating oil moves within the recesses 50 and between the first elements 44 and the second elements 46 ,

The biasing element 48 located opposite the hub H in terms of the clutch mechanism 30 in the axial direction X , The biasing element 48 is for example a diaphragm spring. At least one of brake element 26 and connecting element 28 includes a receiving section 52 , which is the biasing force of the biasing element 48 through the first elements 44 and the second elements 46 receives. As in 8th is shown, the receiving section 52 on the connecting element 28 intended. As in 4 is shown, the receiving section 52 on the flange 28A of the connecting element 28 intended. The first elements 44 and the second elements 46 are between the biasing element 48 and the receiving section 52 trapped.

The adjustment mechanism 22 represents the biasing force of the biasing member 48 one on the first elements 44 and the second elements 46 acts. At least one of brake element 26 and connecting element 28 is with a first threaded section 54 Mistake. The adjustment mechanism 22 includes a second threaded portion 22A that with the first threaded section 54 is screwed. As in 8th shown, is the first threaded portion 54 at the end of the connecting element 28 on the receiving section 52 opposite side in the axial direction X intended. The second threaded section 22A is in a mother 23 provided by the connecting element 28 is disconnected. The adjustment mechanism 22 represents the biasing force of the biasing member 48 corresponding to the length of the second threaded portion 22A one with the first threaded section 54 is screwed. An increase in the length of the second threaded portion 22A that with the first threaded section 54 bolted, increases the frictional force between the first elements 44 and the second elements 46 and makes it difficult for the first elements 44 , relative to the second elements 46 to move. In other words, the capacity of the clutch mechanism 30 will be raised. According to the ratio of between the brake element 26 and the connecting element 28 generated relative rotational force and the friction force between the first elements 44 and the second elements 46 turns off the clutch mechanism 30 between a first state, the relative rotation of the brake element 26 and the connecting element 28 hinders, and a second state that allows the relative rotation. An increase in the frictional force between the first elements 44 and the second elements 46 makes it difficult for the clutch mechanism 30 to change from the first state to the second state.

With reference to 4 limits the sealing element 24 the penetration of dust into the clutch mechanism 30 , The sealing element 24 is located between the brake element 26 and the connecting element 28 , In one example, the sealing element 24 an O-ring. The sealing element 24 is located between an outer peripheral portion of the flange 28A of the connecting element 28 and the inner peripheral portion of the brake element 26 ,

A method for mounting the brake device 10 will now be described.

In a first step, the first elements 44 and the second elements 46 alternately from the side of the first threaded portion 54 in the direction of the receiving section 52 on the outer peripheral portion of the connecting element 28 arranged. The inner peripheral portion of each second element 46 is with the outside Peripheral portion of the connecting element 28 toothed. In a second step, the support element 20 on the outer peripheral portions of the first elements 44 mounted, and the outer peripheral portions of the first elements 44 are with the inner peripheral portions of the support element 20 toothed. In a third step, the biasing element 48 on the outer peripheral portion of the connecting element 28 from the side of the first threaded portion 54 arranged. Then the second threaded section 22A mother 23 with the first threaded section 54 of the connecting element 28 bolted to form a first assembly.

In a fourth step, the first assembly formed in the first to third steps becomes the inner peripheral portion of the brake member 26 used. The sealing element 24 becomes in the inner peripheral portion of the braking element 26 or in the outer peripheral portion of the connecting element 28 arranged. The insertion of the first assembly in the inner peripheral portion of the braking element 26 meshes the outer peripheral portion of the support member 20 with the inner peripheral portion of the braking element 26 ,

In a fifth step, the friction elements become 16 and the brake operating mechanism 18 in the brake element 26 arranged. In a sixth step, the cooling disk 32 on the outer peripheral portion of the brake element 26 assembled. In a seventh step, the bracket 12 and the cover 34 with the brake actuation mechanism 18 coupled. The sixth step may be performed before the fifth step.

The description related to the above embodiment illustrates, without intending to limit, an applicable form of brake apparatus according to the present invention. In addition to the above-described embodiment, the brake apparatus of the present invention is applicable to, for example, modified examples of the above-described embodiment and combinations of at least two of the modified examples which are not contradictory. In the modified examples described below, the same reference numerals are given to the components which are identical to the corresponding components of the above embodiment. A detailed description of these components will be omitted.

The brake element 26 can the recording section 52 include. In this case, the brake element includes 26 a projection projecting inward in the radial direction and the receiving portion 52 is provided on the tab.

The first threaded section 54 can also be on the brake element 26 be provided. For example, the inner peripheral portion of the brake element 26 with the first threaded section 54 Mistake. In this case, the outer peripheral portion of the adjustment mechanism 22 with the second threaded portion 22A Mistake.

The biasing element 48 can be on the side of the clutch mechanism 30 be arranged closer to the hub H in the axial direction X the brake drum 14 lies. Preferably, in this case, the receiving portion 52 on the side of the clutch mechanism 30 that the hub H in the axial direction X the brake drum 14 opposite.

The present invention can also be applied to a brake device other than a roller brake device. For example, the present invention may be applied to a hand brake device or a side brake device.

LIST OF REFERENCE NUMBERS

10

braking device

12

bracket

12A

guide

14

brake drum

16

friction element

18

Brake actuating mechanism

20

support element

22

adjustment

22A

second threaded section

23

mother

24

sealing element

26

braking element

26A

friction surface

26B

inner peripheral section

28

connecting member

28A

flange

28B

gearing

28C

groove

29

sealing element

30

clutch mechanism

32

cooling disk

34

cover

36

rotor

36A

cable holder

38

cam member

38A

recess

38B

cam surface

40

role

42

holder

44

first element

46

second element

48

biasing member

50

recess

52

receiving portion

54

first threaded section

C

mechanical control cable

C1

indoor cables

C2

outdoor cable

D

radial direction

F

bicycle frame

FA

front fork

H

hub

H1

hub axle

H2

hub shell

S

circumferentially

X

axial direction

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• JP 2007062718 A [0002]

Claims (20)

A braking device (10) comprising: a bracket (12) mountable on a bicycle frame (F); a brake drum (14) rotatably provided on the bracket (12); a friction member configured to be in contact with the brake drum; and a brake operating mechanism (18) configured to bring the friction member (16) into contact with the brake drum (14); wherein the brake drum (14) has a brake member (26) configured to be in contact with the friction member (16), a connecting member (28) connected to a hub (H) provided on the bicycle frame (F) , and a clutch mechanism (30) which connects the brake element (26) and the connecting element (28) to a relative rotation of the brake element (26) and of the connecting element (28) in accordance with the relative rotational force generated between the braking element (26) and the connecting element (28). The braking device (10) after Claim 1 wherein the clutch mechanism (30) comprises a first member (44) provided on the brake member (26) in a non-rotatable manner, a second member (46) provided on the connector (28) in a non-rotatable manner, and a biasing member (48) biasing the first member (44) and the second member (46) against each other. The braking device (10) after Claim 2 wherein the first member (44) is provided on an inner peripheral portion (26B) of the brake member (26). The braking device (10) after Claim 3 further comprising a support member (20) disposed on the inner peripheral portion (26B) of the brake member (26), an outer peripheral portion of the support member (20) being interlocked with the inner peripheral portion (26B) of the brake member (26), and the inner peripheral portion (26B) of the support member (20) is toothed to the first member (44). The braking device (10) according to one of Claims 2 to 4 wherein the second member (46) is provided on an outer peripheral portion of the connecting member (28). The braking device (10) after Claim 5 wherein an inner peripheral portion (26B) of the second member (46) is interlocked with the outer peripheral portion of the connecting member (28). The braking device (10) according to one of Claims 2 to 6 wherein the clutch mechanism (30) includes the first member (44) multiple times and the second member (46) multiple times. The braking device (10) according to one of Claims 2 to 7 wherein at least one of the first member (44) and the second member (46) has at least one recess (50) opposite the other of the first member (44) and the second member (46). The braking device (10) after Claim 8 wherein the recess (50) is a through hole. The braking device (10) after Claim 8 or 9 wherein the recess (50) is formed in the first member (44). Braking device (10) according to one of Claims 2 to 10 wherein the biasing member (48) is disposed opposite the hub (H) with respect to the clutch mechanism (30) in an axial direction (X) of the brake drum (14). The braking device (10) according to one of Claims 2 to 11 wherein at least one of the braking member (26) and connecting member (28) includes a receiving portion (52) that receives a biasing force of the biasing member (48) through the first member (44) and the second member (46). The braking device (10) after Claim 12 wherein the receiving portion (52) is provided on the connecting member (28). The braking device (10) according to one of Claims 2 to 13 further comprising an adjustment mechanism (22) that adjusts a biasing force of the biasing member (48) acting on the first member (44) and the second member (46). The braking device (10) after Claim 14 wherein the adjustment mechanism (22) includes a second threaded portion (22A) bolted to a first threaded portion (54) provided on at least one of the brake member (26) and connecting member (28) and the adjustment mechanism (22) Biasing force of the biasing member (48) in accordance with a length of the second threaded portion (22A) screwed to the first threaded portion (54). The braking device (10) according to one of Claims 1 to 15 , further comprising Sealing member (24) limiting the entry of dust into the clutch mechanism (30). The braking device (10) after Claim 16 , wherein the sealing element (24) between the brake element (26) and the connecting element (28) is located. Braking device (10) according to one of Claims 1 to 17 , wherein the connecting element (28) is toothed to the hub (H). The braking device (10) according to one of Claims 1 to 18 wherein the brake member (26) has a friction surface (26A) on an inner peripheral portion (26B), and the friction member (16) is arranged to contact the friction surface (26A) of the brake member (26). The braking device (10) according to one of Claims 1 to 19 wherein the bicycle frame (F) includes a front fork (FA), and the holder (12) is configured to be mountable to the front fork (FA).

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