BICYCLE BRAKE CALIPER ASSEMBLY

Abstract

Bicycle brake caliper assembly (400, 500), comprising: a brake caliper (410, 510) configured to exert a braking force on a brake disc (50) configured to be rotatable about a pivot axis (A1);and a basic component (420, 520) configured to be coupled to the brake caliper (410, 510) and attached to a bicycle frame (14) such that the relative position between the axis of rotation (A1) of the brake disc (50) and the brake caliper (410, 510) is adjustable in a radial direction (D1) of the brake disc (50), wherein the brake caliper (410, 510) is a hydraulically operated brake caliper and includes a brake caliper fluid channel (58), wherein the basic component (420, 520) includes at least one through-hole (432, 532, 536), wherein the bicycle brake caliper assembly (400, 500) further includes a fluid communication component (490) which passes through the or one of the through-holes (432, 532, 536). runs and is in fluid communication with the brake caliper fluid channel (58).

Description

The present invention relates to a bicycle caliper assembly.Bicycling is becoming an increasingly more popular form of recreational involvement as well as transportation. Moreover, bicycling has become a very popular power port for both amateurs and professionals. Whether the bicycle is now used as a Freizeitbeschäftigung for transportation or competition, the bicycle industry constantly improves the various components of the bicycle. One component that has been extensively revised is the bicycle brake device. More specifically, bicycles have been equipped with disc brake devices in recent years.An example of a bicycle brake caliper assembly is disclosed in EP 2 444 309 A1. A bicycle disc brake includes a first shell, a second shell screwed to the first shell, a first braking force application unit, and a second braking force application unit. In a relaxed position of the disc brake assembly, a brake disc freely passes a gap between the brake pad in the second brake force application unit and the brake pad in the first brake force application unit. In response to pulling a brake cable, a spring-loaded bracket pivots counterclockwise to cause the second brake pad to press the brake disc against the first brake unit.Another example of a bicycle brake caliper assembly is disclosed in DE 603 12 359 T2. The assembly more particularly relates to an anti-lock disc brake device mounted on the front / rear fork of a bicycle. The assembly includes a carriage, a plurality of steel balls, and a corrugated disk. The bicycle caliper assembly of DE 603 12 359 T2 is not only capable of preventing brake lock, but also prevents unstable drivability caused by sudden high-speed braking.Document DE 600 00 637 T2 discloses another example of a bicycle brake caliper assembly with a mounting structure. The caliper is fixed to a wheel support portion of a bicycle frame, the rotor is fixedly attached to the wheel and the rotor lies in a fixed plane relative to the support portion of the frame. The rotor is received between a pair of brake pads that are moved into and out of contact with the rotor along a selected axis by the caliper. The attachment structure enables a continuous variation of the pitch angle between the selection axis and the rotor plane within a defined range.An example of a bicycle disc brake caliper is disclosed in US 2013 / 0 048 444 A1. The bicycle disc brake caliper is provided with a first side caliper part and a second side caliper part. The first lateral caliper portion includes a first surface. The second lateral caliper portion includes a second surface. The first and second surfaces of the first and second caliper parts are fixedly connected together by an adhesive material, wherein a brake disc slot is formed between the first and second caliper parts.An object of the present invention is to provide a bicycle caliper assembly that is at least partially protected by the front fork.The object is achieved according to the invention by the bicycle brake caliper assembly according to claim 1 and by the bicycle according to claim 12.According to a first aspect of the present invention, a bicycle caliper assembly includes a base member. The base member is configured to be coupled to a brake caliper configured to apply a braking force to a brake disc configured to be rotatable about an axis of rotation. The base member is configured to be fixed to a bicycle frame such that the relative position between the rotational axis of the brake disc and the caliper is adjustable in a radial direction of the brake disc. The brake caliper is a hydraulically operated brake caliper. The caliper includes a caliper fluid passage, wherein the base member includes at least one through hole. The bicycle caliper assembly further includes a fluid communication member that passes through the through hole or one of the through holes and is in fluid communication with the caliper fluid passage.Advantageous refinements of the bicycle brake caliper assembly according to the first aspect are described in claims 2 to 11.According to a second aspect of the present invention, a bicycle includes a bicycle frame, a brake operating mechanism, a bicycle caliper assembly according to the first aspect or any one of its aspects, and a hydraulic brake hose. The hydraulic brake hose couples the brake actuation mechanism to the bicycle caliper assembly. The hydraulic brake hose is hydraulically connected to the bicycle brake caliper assembly via a banjo and the fluid communication component.An advantageous development of the bicycle according to the second aspect is described in claim 13.The invention and many of the attendant advantages will become more fully appreciated as the same becomes better understood by reference to the following detailed description when taken in conjunction with the accompanying drawings, wherein: FIG. 1 is a left side view of the front portion of a bicycle with a bicycle caliper assembly according to a first embodiment of the present invention; FIG. 2 is a partial side view of a bicycle disc brake device including the bicycle caliper assembly according to the first embodiment of the present invention; FIG. 3 is a schematic structural diagram of the bicycle disc brake device illustrated in FIG. 2 ; FIG. 4 is an exploded perspective view of the bicycle caliper assembly shown in FIG. 2 (first position); FIG. 5 is an exploded perspective view of the bicycle caliper assembly shown in FIG. 2 (first position); FIG. 6A is a rear side view of the base member illustrated in FIG. 5 ; FIG. 6B is a partial cross-sectional view of the base member taken along line VIB-VIB of FIG. 6C ; FIG. 6C is the front view of the base member illustrated in FIG. 5 ; FIG. 7 is an exploded perspective view of the bicycle caliper assembly shown in FIG. 2 (second position); FIG. 8A is a side view of the bicycle caliper assembly shown in FIG. 4 (first position); FIG. 8B is a side view of the bicycle caliper assembly shown in FIG. 7 (second position); FIG. 9 is an exploded perspective view of the bicycle caliper assembly according to a second embodiment of the present invention (first position); FIG. 10 is an exploded perspective view of the bicycle caliper assembly according to a second embodiment of the present invention (second position); FIG. 11A is a rear side view of the base member illustrated in FIG. 10 ; FIG. 11B is a partial cross-sectional view of the base member taken along the line XIB-XIB of FIG. 11C ; FIG. 11C is the front view of the base member illustrated in FIG. 10 ; FIG. 12A is a side view of the bicycle caliper assembly shown in FIG. 9 (first position); FIG. 12B is a side view of the bicycle caliper assembly shown in FIG. 10 (second position); FIG. 13 is an exploded perspective view of the bicycle caliper assembly according to a third embodiment of the present invention; FIG. 14A is a rear side view of the base member illustrated in FIG. 13 ; FIG. 14B is a partial cross-sectional view of the base member taken along line XIVB-XIVB of FIG. 14C ; FIG. 14C is the front view of the base member illustrated in FIG. 13 ; FIG. 15A is a side view of the bicycle caliper assembly illustrated in FIG. 13 (first position); FIG. 15B is a side view of the bicycle caliper assembly illustrated in FIG. 13 (second position); FIG. 16 is an exploded perspective view of the bicycle caliper assembly according to a fourth embodiment of the present invention; FIG. 17 is an exploded perspective view of the bicycle caliper assembly according to the fourth embodiment of the present invention; FIG. 18A is a rear side view of the base member illustrated in FIG. 17 ; FIG. 18B is a partial cross-sectional view of the base member taken along line XVIIIB-XVIIIB of FIG. 18C ; FIG. 18C is the front view of the base member illustrated in FIG. 17 ; FIG. 19 is a partial cross-sectional view of a liquid communication member and its periphery illustrated in FIG. 16 ; FIG. 20A is a side view of the bicycle caliper assembly shown in FIG. 16 (first position); FIG. 20B is a side view of the bicycle caliper assembly shown in FIG. 16 (second position); FIG. 21 is an exploded perspective view of the bicycle caliper assembly according to a fifth embodiment of the present invention; FIG. 22 is an exploded perspective view of the bicycle caliper assembly according to the fifth embodiment of the present invention; FIG. 23A is a rear side view of the base member illustrated in FIG. 21 ; FIG. 23B is a partial cross-sectional view of the base member taken along line XXIIIB-XXIIIB of FIG. 23C ; FIG. 23C is the front view of the base member illustrated in FIG. 21 ; FIG. 24 is a partial cross-sectional view of a first coupling member and its periphery illustrated in FIG. 21 ; FIG. 25A is a side view of the bicycle caliper assembly shown in FIG. 21 (first position); and FIG. 25B is a side view of the bicycle caliper assembly illustrated in FIG. 21 (second position).The embodiments will now be described with reference to the accompanying drawings, wherein like reference numerals designate corresponding or identical elements throughout the several drawings.Initially, referring to FIG. 1, a bicycle 10 includes a bicycle frame 14, a front wheel 17, a rear wheel (not shown), a drive train (not shown), and a bicycle disc brake device 12. The handlebar 15 (FIG. 2 ) is fixed to the front fork shaft through the front arm. The rear wheel is rotatably supported by the rear end of the main frame 13. The bicycle disc brake device 12 includes a bicycle caliper assembly 100, a brake disc 50, and a brake operating mechanism 16. In the first embodiment, the following directional formulas "front", "rear", "forward", "rearward", "left", "right", "up", and "down", as well as other similar directional formulas, refer to those directions determined with respect to a cyclist seated on the caliper (not shown) of a bicycle and facing the handlebar 15. Accordingly, these terms, when used to describe the bicycle caliper assembly 100, should be interpreted relative to a bicycle equipped with the bicycle caliper assembly 100 used in an upright seating position on a horizontal surface. These definitions may also be applied to other embodiments.Referring to FIG. 2, the bicycle caliper assembly 100 is mounted to the front fork 40 of the bicycle frame 14. It is understood that the bicycle caliper assembly 100 may also be mounted to the main frame 13 for the rear wheel. The bicycle caliper assembly 100 includes a caliper 110 and a base member 120. The caliper 110 is coupled to the base member 120. The base member 120 is fixed to the front fork 40 by a first fixing member 151 and a second fixing member 155. The brake operating mechanism 16 is configured to operate the bicycle caliper assembly 100 to apply a braking force to the brake disc 50. The brake disk 50 is mounted on the front hub body 60 so as to be integrally rotatable about a rotation axis A 1 with the front hub body 60 and the front wheel 17. Brake disks having different outer diameters may be mounted on the front hub body 60. The bicycle caliper assembly 100 is configured such that the relative position between the rotational axis A 1 and the caliper 110 is adjustable in the radial direction D 1 of the brake disc 50.As seen in FIG. 2, the brake operating mechanism 16 includes a master cylinder 24, a master piston 34, a collar 26, a brake lever 28, and a hydraulic fluid reservoir 36. The master cylinder 24 includes a master cylinder bore 32 in which the master piston 34 is movably disposed. The brake lever 28 is pivotally coupled to the master cylinder 24 for actuation of the bicycle caliper assembly 100. The brake lever 28 is operatively coupled to the master piston 34 such that the master piston 34 is movable within the master cylinder bore 32 in response to the pivotal movement of the brake lever 28. The hydraulic fluid reservoir 36 is in fluid communication with the master cylinder bore 32. the master cylinder 24 and the hydraulic fluid reservoir 36 contain hydraulic fluid such as mineral oil. The master cylinder 24 has an outlet 38 through which the bicycle brake caliper assembly 100 is supplied with hydraulic fluid via a hydraulic brake hose 86 and a banjo 87.Referring to FIG. 3, the caliper 110 is configured to apply a braking force to the brake disc 50 configured to be rotatable about the rotational axis A 1. The caliper 110 includes a housing 112, two pistons 74, and two brake pads 76. the brake pads 76 are coupled to a biasing member (not shown). The pistons 74 are arranged to urge the brake pads 76 toward the brake disc 50. The housing 112 includes two cylinders 57 and a caliper liquid passage 58. the pistons 74 are disposed in the cylinders 57 so as to be movable in the axis direction D 2 of the brake disk 50. The fluid chambers 59 are defined by the pistons 74 and the cylinders 57. The fluid chambers 59 are in fluid communication with the caliper fluid passage 58, and the caliper fluid passage 58 is in fluid communication with the master cylinder 24 via the hydraulic brake hose 86.When the brake lever 28 is actuated, the master piston 34 moves within the master cylinder 24 in response to the pivotal movement of the brake lever 28, thereby allowing pressurized fluid to move through the hydraulic brake hose 86 connected to the brake caliper 110. The pressurized oil moves the pistons 74 that press the brake pads 76 against the brake disc 50, thereby applying the braking force to the brake disc 50.Referring to FIG. 4, the bicycle caliper assembly 100 is configured to be attached to the front fork 40 of the bicycle frame 14. The bicycle caliper assembly 100 includes the caliper 110, the base member 120, a first coupling member 141, and a second coupling member 145. In the caliper 110 shown in FIG. 4, parts other than the housing 112 (e.g., the brake pads 76 and the pistons 74) have been omitted. The caliper 110 is coupled to the base member 120 through the first coupling member 141 and the second coupling member 145. The base member 120 is fixed to the front fork 40 by the first fixing member 151 and the second fixing member 155. The caliper 110 and the base member 120 are made of a metallic material such as aluminum alloy or iron. As discussed below, the base member 120 is configured to be coupled to the caliper 110 and fixed to the bicycle frame 14 (the front fork 40) such that the relative position between the rotational axis A 1 of the brake disc 50 and the caliper 110 is adjustable in the radial direction D 1 of the brake disc 50.The base member 120 extends in the longitudinal direction D 3. The longitudinal direction D 3 of the base member 120 is substantially parallel to the radial direction D 1 of the brake disk 50 in a state where the base member 120 is fixed to the front fork 40 (FIG. 1 ).The base member 120 includes a main body 121, a first end portion 122, and a second end portion 123. In the first embodiment, the main body 121, the first end portion 122, and the second end portion 123 are integrally provided as a one-piece unitary member. The main body 121 is plate-shaped and extends in the longitudinal direction D 3 (in the radial direction D 1). The first end portion 122 is opposed to the second end portion 123 with respect to the main body 121. The first end portion 122 is disposed at one end of the main body 121. The second end portion 123 is disposed at the other end of the main body 121. The base member 120 includes a first mounting through hole 124 and a second mounting through hole 125. The first attachment through hole 124 is provided at the first end portion 122. The second attachment through hole 125 is provided at the second end portion 123.The base member 120 includes a saddle-side contact surface 128. The saddle-side contact surface 128 is flat and provided on the main body 121. The caliper-side contact surface 128 is configured to contact the caliper 110 in a state where the base member 120 is coupled to the caliper 110.The base member 120 further includes a coupling portion 131 to which the caliper 110 is coupled. The coupling portion 131 includes a first through hole 132 and a second through hole 136. The first through hole 132 and the second through hole 136 are provided on the main body 121. The second through hole 136 is disposed spaced apart from the first through hole 132 in the radial direction D 1 (in the longitudinal direction D 3). The second attachment through hole 125 is spaced apart from the first attachment through hole 124 in the radial direction D 1 (in the longitudinal direction D 3). The first through hole 132 and the second through hole 136 are disposed between the first mounting through hole 124 and the second mounting through hole 125.The first coupling member 141 is configured to couple the caliper 110 to the base member 120. The second coupling member 145 is configured to couple the caliper 110 to the base member 120. In FIG. 4, the first coupling member 141 passes through the first through hole 132, and the second coupling member 145 passes through the second through hole 136, in a state where the base member 120 is coupled to the caliper 110 with the first coupling member 141 and the second coupling member 145. The first coupling member 141 is a countersunk screw and includes a first external thread 142 and a first countersunk head 143. The second coupling member 145 is a countersunk screw and includes a second external thread 146 and a second countersunk head 147. In the first embodiment, the second coupling member 145 has substantially the same shape as the first coupling member 141. It is understood that the second coupling member 145 has a different shape than the first coupling member 141.In a state where the base member 120 is coupled to the caliper 110 with the first coupling member 141 and the second coupling member 145, the base member 120 is fixed to a fixing portion 41 of the front fork 40 by the first fixing member 151 and the second fixing member 155.The attachment portion 41 of the front fork 40 is recessed and includes a support surface 42 and threaded holes 43 and 44. The threaded bores 43 and 44 are provided on the support surface 42. The base member 120 is disposed in the mounting portion 41 in a state where the base member 120 is fixed to the front fork 40 with the first fixing member 151 and the second fixing member 155.The first fastening member 151 is a hexagon socket screw and includes a first external thread 152 and a first hexagon socket head 153. In FIG. 4, the first external thread 152 is screwed into the threaded hole 43 through the first fastening through hole 124, and the first end portion 122 of the base member 120 is screwed with the first fastening member 151 to the fastening portion 41 of the front fork 40.The second fastening component 155 is a hexagon socket screw and comprises a second external thread 156 and a second hexagon socket head 157. In FIG. 4, the second external thread 156 is screwed into the threaded hole 44 through the second fastening through hole 125, and the second end portion 123 of the base member 120 is screwed to the fastening portion 41 of the front fork 40 with the second fastening member 155.Referring to FIG. 5, the housing 112 of the caliper 110 includes a port 115, a vent 116, a slot 114, and a mounting back surface 119. The port 115 and the vent 116 are in fluid communication with the caliper fluid passage 58 (FIG. 3 ). The hydraulic brake hose 86 is connected to the connection opening 115 via the banjo 87 (FIG. 2 ). A vent nipple (not shown) is coupled to the vent opening 116. The slot 114 extends such that an outer friction portion of the brake disc is disposed in the slot 114. The mounting back surface 119 is flat and configured to contact the caliper-side contact surface 128 (FIG. 4 ) of the base member 120 in a state where the caliper 110 is coupled to the base member 120.The caliper 110 further includes a first threaded bore 117 and a second threaded bore 118. The first threaded hole 117 and the second threaded hole 118 are provided on the mounting back surface 119. The distance between the first threaded hole 117 and the second threaded hole 118 is substantially the same as the distance between the first through hole 132 and the second through hole 136. In FIG. 5, the first external thread 142 of the first coupling member 141 is screwed into the first threaded hole 117, and the second external thread 146 of the second coupling member 145 is screwed into the second threaded hole 118.The base member 120 includes a frame-side contact surface 129 disposed on the opposite side of the caliper 110 with respect to the base member 120. The frame-side contact surface 129 is flat and provided on the main body 121, the first end portion 122, and the second end portion 123. The frame-side contact surface 129 is configured to contact the support surface 42 (FIG. 4 ) of the front fork 40 in a state where the base member 120 is fixed to the front fork 40.As seen in FIG. 5, the first through hole 132 includes a first tapered surface 133 provided on the frame-side contact surface 129. The second through hole 136 includes a second tapered surface 137 provided on the frame-side contact surface 129. In a state where the base member 120 is coupled to the caliper 110 with the first coupling member 141, the first countersunk head 143 of the first coupling member 141 contacts the first tapered surface 133 of the first through hole 132 and is disposed in a space defined by the first tapered surface 133, which prevents the first countersunk head 143 from protruding beyond the frame-side contact surface 129 toward the front fork 40. In a state where the base member 120 is coupled to the caliper 110 with the second coupling member 145, the second countersunk head 147 of the second coupling member 145 contacts the second tapered surface 137 of the second through hole 136, and is disposed in a space defined by the second tapered surface 137, which prevents the second countersunk head 147 from protruding beyond the frame-side contact surface 129 toward the front fork 40.Referring to FIGS. 6A and 6B, the first through hole 132 has substantially the same shape as the second through hole 136. The first tapered surface 133 has substantially the same shape as the second tapered surface 137. The first tapered surface 133 is provided at an end portion of the first through hole 132. The second tapered surface 137 is provided at an end portion of the second through hole 136.As seen in FIG. 6A, the first attachment through hole 124 and the second attachment through hole 125 extend in the transverse direction D 4 of the base member 120. The transverse direction D 4 is defined perpendicular to the longitudinal direction D 3 of the base member 120 and along the saddle-side contact surface 128 and the frame-side contact surface 129. The lateral direction D 4 is substantially parallel to the axis direction D 2 of the brake disk 50 in a state where the base member 120 is fixed to the front fork 40 of the bicycle frame 14. It should be appreciated that the first mounting through hole 124 and the second mounting through hole 125 may be circular through holes.Referring to FIG. 6B, the thickness of the first end portion 122 is substantially the same as the thickness of the second end portion 123. The thickness T 1 of the main body 121 is larger than the thickness T 2 of the first end portion 122 and the second end portion 123.Referring to FIG. 6C, the distance L 11 between the center C 11 of the first mounting through hole 124 and the center C 12 of the first through hole 132 is different from the distance L 12 between the center C 14 of the second mounting through hole 125 and the center C 13 of the second through hole 136. Specifically, the distance L 11 between the center C 11 of the first attachment through hole 124 and the center C 12 of the first through hole 132 is larger than the distance L 12 between the center C 14 of the second attachment through hole 125 and the center C 13 of the second through hole 136. The distances L 11 and L 12 are smaller than the distance L 13 between the center C 12 of the first through hole 132 and the center C 13 of the second through hole 136. That is, the base member 120 has an asymmetric shape in the longitudinal direction D 3. Since the distance L 11 is different from the distance L 12, the turning over of the base member 120 may change the position of the coupling portion 131 in the radial direction D 1.Referring to FIGS. 4 and 7, the base member 120 is fixed to the bicycle frame 14 with a first orientation or a second orientation. FIG. 4 illustrates the base member 120 disposed to be secured to the front fork 40 with the first orientation. FIG. 7 illustrates the base member 120 disposed to be secured to the front fork 40 with the second orientation.As seen in FIG. 4, the first end portion 122 is disposed in an upper position, and the second end portion 123 is disposed in a lower position in a state where the base member 120 having the first orientation is fixed to the front fork 40. As seen in FIG. 7, in a state where the base member 120 having the second orientation is fixed to the front fork 40, the second end portion 123 is disposed in an upper position and the first end portion 122 is disposed in a lower position. That is, the base member 120 disposed with the second orientation is reversed in the radial direction D 1 with respect to the base member 120 disposed in the first orientation.As seen in FIG. 4, in a state where the base member 120 is fixed to the bicycle frame 14 with the first orientation, the first external thread 142 of the first coupling member 141 is screwed into the first threaded hole 117 through the first through hole 132, and the second external thread 146 of the second coupling member 145 is screwed into the second threaded hole 118 through the second through hole 136. The first attachment member 151 passes through the first attachment through hole 124, thereby attaching the base member 120 to the bicycle frame 14. The second attachment member 155 passes through the second attachment through hole 125, thereby attaching the base member 120 to the bicycle frame 14. The first end portion 122 of the base member 120 is screwed to the fastening portion 41 of the front fork 40 with the first fastening member 151 and the threaded hole 43. The second end portion 123 of the base member 120 is screwed to the fastening portion 41 of the front fork 40 with the second fastening member 155 and the threaded hole 44.As seen in FIG. 7, in a state where the base member 120 having the second orientation is fixed to the bicycle frame 14, the first external thread 142 is screwed into the first threaded hole 117 through the second through hole 136, and the second external thread 146 is screwed into the second threaded hole 118 through the first through hole 132. The first attachment member 151 passes through the second attachment through hole 125, thereby attaching the base member 120 to the bicycle frame 14. The second attachment member 155 passes through the first attachment through hole 124, thereby attaching the base member 120 to the bicycle frame 14. The second end portion 123 of the base member 120 is screwed to the fastening portion 41 of the front fork 40 with the first fastening member 151 and the threaded hole 43. The first end portion 122 of the base member 120 is screwed to the fastening portion 41 of the front fork 40 with the second fastening member 155 and the threaded hole 44.FIG. 8A is a side view of the bicycle caliper assembly 100 in a state where the base member 120 is fixed to the front fork 40 with the first orientation. FIG. 8B is a side view of the bicycle caliper assembly 100 in a state where the base member 120 having the second orientation is fixed to the front fork 40. FIG. 8A corresponds to FIG. 4, and FIG. 8B corresponds to FIG. 7.Referring to FIGS. 8A and 8B, the bicycle caliper assembly 100 may be in two different states corresponding to the brake disc 50 and a brake disc 55, respectively, having an outer diameter R 2 that is larger than the outer diameter R 1 of the brake disc 50, respectively. The base member 120 is configured such that a first position P 11 of the coupling portion 131 in a state where the base member 120 having the first orientation is fixed to the bicycle frame 14 is different from a second position P 12 of the coupling portion 131 in a state where the base member 120 having the second orientation is fixed to the bicycle frame 14 in the radial direction D 1. In the first embodiment, the first and second positions P 11 and P 12 are defined based on a center line of the second threaded hole 118, for example.As seen in FIG. 8A, in a state where the base member 120 is fixed to the front fork 40 with the first orientation, a first distance L 17 is defined between the rotational axis A 1 of the brake disk 50 and the center line of the second threaded hole 118 in the radial direction D 1. As seen in FIG. 8B, in a state where the base member 120 having the second orientation is fixed to the front fork 40, a second distance L 18 is defined between the rotational axis A 1 of the brake disk 55 and the center line of the second threaded hole 118 in the radial direction D 1. As seen in FIGS. 8A and 8B, the second distance L 18 corresponding to the second orientation is larger than the first distance L 17 corresponding to the first orientation. Thus, changing the orientation of the base member 120 relative to the front fork 40 and the caliper 110 allows the bicycle caliper assembly 100 to be adjusted to the brake disks 50 and 55 having different outer diameters R 1 and R 2.It should be understood that the orientations of the base member are not limited to the first and second orientations, and that the bicycle caliper assembly according to the present invention can be adjusted to any of the three or more brake disks having different outer diameters by changing the orientation of the base member with respect to the bicycle frame and the caliper between the three or more different orientations. Further, it is understood that the coupling portion 131 of the base member 120 is not limited to the first through hole 132 and the second through hole 136, and may include at least one through hole such that the relative position between the rotation axis A 1 and the caliper 110 in the radial direction D 1 is adjustable by changing the orientation of the base member 120.Next, a bicycle caliper assembly 200 according to a second embodiment of the present invention will be described with reference to FIGS. 9 to 12B. Here, elements having substantially the same function as those in the first embodiment are numbered the same, and will not be described in detail again.In the first embodiment, the orientation of the base member 120 is changed to adjust the bicycle caliper assembly 100 to each of the brake disks 50 and 55; however, the bicycle caliper assembly 200 may be adjusted to each of the brake disks 50 and 55 with a base member 220 having a different structure from that of the base member 120 of the first embodiment.Referring to FIG. 9, the bicycle caliper assembly 200 includes the caliper 110, the base member 220, the first coupling member 141, and the second coupling member 145. The first coupling member 141 and the second coupling member 145 are configured to couple the caliper 110 to the base member 220. Like the base member 120 of the first embodiment, the base member 220 is configured to be coupled to the brake caliper 110 and fixed to the bicycle frame 14 (the front fork 40) such that the relative position between the rotational axis A 1 of the brake disc 50 and the brake caliper 110 in the radial direction D 1 of the brake disc 50 is adjustable; however, the base member 220 has a different structure from the base member 120 of the first embodiment.Specifically, the base member 220 includes a main body 221, the first end portion 122, and the second end portion 123. The main body 221, the first end portion 122, and the second end portion 123 are integrally provided as a one-piece unitary member. The base member 220 is made of a metallic material such as aluminum alloy or iron. The main body 221 is plate-shaped and extends in the longitudinal direction D 3 (in the radial direction D 1). The first end portion 122 is opposed to the second end portion 123 with respect to the main body 221. The first end portion 122 is disposed at one end of the main body 221. The second end portion 123 is disposed at the other end of the main body 221.As seen in FIG. 9, the base member 220 further includes a first coupling portion 230 to which the caliper 110 is coupled and a second coupling portion 235 to which the caliper 110 is coupled. The first coupling portion 230 and the second coupling portion 235 are provided on the main body 221.Unlike the base member 120 of the first embodiment, the base member 220 includes four through holes such that the relative position between the rotation axis A 1 and the caliper 110 in the radial direction D 1 is adjustable instead of the first through hole 132 and the second through hole 136 of the base member 120. As seen in FIG. 9, the first coupling portion 230 includes a first through hole 231 through which the first coupling member 141 passes and a third through hole 233 through which the second coupling member 145 passes. As seen in FIG. 10, the second coupling portion 235 includes a second through hole 236 through which the first coupling member 141 passes and a fourth through hole 238 through which the second coupling member 145 passes. The first through hole 231 is provided between the second through hole 236 and the fourth through hole 238 in the radial direction D 1. The fourth through hole 238 is provided between the first through hole 231 and the third through hole 233 in the radial direction D 1. The first to fourth through holes 231, 236, 233, and 238 are aligned in the radial direction D 1 (in the longitudinal direction D 3 of the base member 220).As seen in FIGS. 9 and 10, the second coupling portion 235 is disposed spaced apart from the first coupling portion 230 in the radial direction D 1. Specifically, the first coupling portion 230 is closer to the second end portion 123 than the first end portion 122. The second coupling portion 235 is closer to the first end portion 122 than the second end portion 123.For example, as seen in FIG. 9, in a state where the caliper 110 is coupled to the base member 220 at the first coupling portion 230, the first coupling member 141 is screwed into the first threaded hole 117 of the caliper 110 through the first through hole 231, and the second coupling member 145 is screwed into the second threaded hole 118 of the caliper 110 through the third through hole 233.For example, as seen in FIG. 10, in a state where the caliper 110 is coupled to the base member 220 at the second coupling portion 235, the first coupling member 141 is screwed into the first threaded hole 117 of the caliper 110 through the second through hole 236, and the second coupling member 145 is screwed into the second threaded hole 118 of the caliper 110 through the fourth through hole 238.Referring to FIGS. 11A and 11B, the first through hole 231 includes a first tapered surface 232 provided on the frame-side contact surface 129. The second through hole 236 includes a second tapered surface 237 provided on the frame-side contact surface 129. The third through hole 233 includes a third tapered surface 234 provided on the frame-side contact surface 129. The fourth through hole 238 includes a fourth tapered surface 239 provided on the frame-side contact surface 129. The first to fourth tapered surfaces 232, 237, 234, and 239 have substantially the same function as the first and second tapered surfaces 133 and 137 of the first embodiment. The first countersunk head 143 (or the second countersunk head 147) contacts the first tapered surface 232 of the first through hole 231 and is provided in a space defined by the first tapered surface 232, which prevents the first countersunk head 143 from protruding beyond the frame-side contact surface 129 toward the front fork 40. The first countersunk head 143 (or the second countersunk head 147) contacts the second tapered surface 237 of the second through hole 236, and is provided in a space defined by the second tapered surface 237, which prevents the first countersunk head 143 from protruding beyond the frame-side contact surface 129 toward the front fork 40. The second countersunk head 147 (or the first countersunk head 143) contacts the third tapered surface 234 of the third through hole 233 and is provided in a space defined by the third tapered surface 234, which prevents the second countersunk head 147 from protruding beyond the frame-side contact surface 129 toward the front fork 40. The second countersunk head 147 (or the first countersunk head 143) contacts the fourth tapered surface 239 of the fourth through hole 238 and is provided in a space defined by the fourth tapered surface 239, which prevents the second countersunk head 147 from protruding beyond the frame-side contact surface 129 toward the front fork 40.As seen in FIG. 11C, a distance L 21 is defined between the center C 11 of the first mounting through hole 124 and the center C 22 of the second through hole 236. A distance L 22 is defined between the center C 21 of the first through hole 231 and the center C 22 of the second through hole 236. A distance L 23 is defined between the center C 21 of the first through hole 231 and the center C 24 of the fourth through hole 238. A distance L 24 is defined between the center C 23 of the third through hole 233 and the center C 24 of the fourth through hole 238. A distance L 25 is defined between the center C 14 of the second mounting through hole 125 and the center C 23 of the third through hole 233. The distances L 21, L 22, L 24, and L 25 are substantially equal to and shorter than the distance L 23. That is, the base member 220 has a substantially symmetrical shape in the longitudinal direction D 3. Thus, the base member 220 may be used to secure the caliper 110 to the front fork 40 regardless of the vertical orientation of the base member 220. For example, the base member 220 may be coupled to the caliper 110 in a state where the second end portion 123 is provided at an upper position.Referring to FIGS. 12A and 12B, the bicycle caliper assembly 200 may be in two different states corresponding to the brake disc 50 and the brake disc 55, respectively, having an outer diameter R 2 that is larger than the outer diameter R 1 of the brake disc 50.The base member 220 is configured such that a first position P 21 of the caliper 110 in a state where the caliper 110 is coupled to the base member 220 at the first coupling portion 230 is different from a second position P 22 of the caliper 110 in a state where the caliper 110 is coupled to the base member 220 at the second coupling portion 235. In the second embodiment, the first and second positions P 21 and P 22 are defined based on the center line of the second threaded hole 118, for example.As seen in FIG. 12A, in a state where the caliper 110 is fixed to the front fork 40 via the first coupling portion 230 of the base member 220, a first distance L 27 from the rotational axis A 1 of the brake disk 50 to the center line of the second threaded hole 118 in the radial direction D 1 is defined. As seen in FIG. 12B, in a state where the caliper 110 is fixed to the front fork 40 via the second coupling portion 235 of the base member 220, a second distance L 28 from the rotational axis A 1 of the brake disk 55 to the center line of the second threaded hole 118 in the radial direction D 1 is defined. As seen in FIGS. 12A and 12B, the second distance L 28 corresponding to the second coupling portion 235 is larger than the first distance L 27 corresponding to the first coupling portion 230. Accordingly, a change in the relative position between the base member 220 and the caliper 110 enables the bicycle caliper assembly 200 to be adjusted to the brake disks 50 and 55 having different outer diameters R 1 and R 2.It should be understood that the first coupling portion 230 and the second coupling portion 235 are not limited to the first to fourth through holes 231, 236, 233, and 238, and each may include at least one through hole provided in the base member as coupling portions to which the caliper is coupled, and that the bicycle caliper assembly according to the present invention may be set to three or more brake disks having different outer diameters with the at least one through hole of the coupling portions.Next, a bicycle caliper assembly 300 according to a third embodiment of the present invention will be described with reference to FIGS. 13 to 15B. Here, elements having substantially the same function as in the first and second embodiments are numbered the same, and will not be described in detail again.Referring to FIG. 13, the bicycle caliper assembly 300 includes the caliper 110, a base member 320, the first coupling member 141, and the second coupling member 145. Like the base members 120 and 220 of the first and second embodiments, the base member 320 is configured to be coupled to the caliper 110 and fixed to the bicycle frame 14 (the front fork 40) such that the relative position between the rotational axis A 1 and the caliper 110 is adjustable in the radial direction D 1; however, the base member 320 has a different structure from the base members 120 and 220 of the first and second embodiments.Specifically, the base member 320 includes a main body 321, the first end portion 122, and the second end portion 123. The main body 321, the first end portion 122, and the second end portion 123 are integrally provided as a one-piece unitary member. The base member 320 is made of a metallic material such as aluminum alloy or iron. The main body 321 is plate-shaped and extends in the longitudinal direction D 3 (in the radial direction D 1). The first end portion 122 is opposed to the second end portion 123 with respect to the main body 321. The first end portion 122 is disposed at one end of the main body 321. The second end portion 123 is disposed at the other end of the main body 321.As seen in FIG. 13, the base member 320 includes an elongated through hole 333 through which the first coupling member 141 and the second coupling member 145 pass. The elongated through hole 333 extends in the radial direction D 1 (in the longitudinal direction D 3 of the base member 320). The elongated through hole 333 extends in the radial direction D 1 from one end portion of the main body 321 to the other end portion of the main body 321. The base member 320 is configured to be coupled to the caliper 110 and fixed to the bicycle frame 14 (the front fork 40) such that the relative position between the rotational axis and the caliper 110 in the radial direction D 1 is adjustable in the elongated through hole 333.Referring to FIGS. 14A and 14B, the elongated through hole 333 includes a tapered surface 334 provided on the frame-side contact surface 129. The first countersunk head 143 of the first coupling member 141 and the second countersunk head 147 of the second coupling member 145 contact the tapered surface 334 and are provided in a space defined by the tapered surface 334, which prevents the first and second countersunk heads 143 and 147 from protruding beyond the frame-side contact surface 129 toward the front fork 40. As seen in FIGS. 14A to 14C, the base member 320 has a substantially symmetrical shape in the longitudinal direction D 3. Thus, although in this embodiment, the base member 320 is coupled to the caliper 110 in a state where the second end portion 123 is disposed at a lower position, the base member 320 may be fixed to the caliper 110 and the front fork 40 regardless of the vertical orientation of the base member 320.Referring to FIGS. 15A and 15B, the base member 320 is configured to be coupled to the caliper 110 and fixed to the bicycle frame 14 (the front fork 40) such that the relative position between the rotational axis A 1 and the caliper 110 in the radial direction D 1 is adjustable in the elongated through hole 333.As seen in FIG. 15A, the first distance L 37 between the rotation axis A 1 and the center line of the second threaded hole 118 is shortest in the radial direction D 1 in the elongated through hole 333 in a state where the caliper 110 is disposed at the first position P 31. As seen in FIG. 15B, the second distance L 38 between the rotation axis A 1 and the center line of the second threaded hole 118 in the radial direction D 1 is the largest in the elongated through hole 333 in a state where the caliper 110 is disposed at the second position P 32. With the elongated through hole 333, the relative position between the rotational axis A 1 and the caliper 110 in the radial direction D 1 is adjustable at a desired position within a range of the elongated through hole 333. Thus, changing the relative position between the base member 320 and the caliper 110 enables the bicycle caliper assembly 300 to be adjusted to each of the brake disks 50 and 55 having different outer diameters R 1 and R 2. Further, since the base member 320 includes the elongated through hole 333, the bicycle caliper assembly 300 can be adjusted to other brake disks having outer diameters that are larger than the outer diameter R 1 and that are smaller than the outer diameter R 2. It is understood that the elongated through hole 333 may be divided into a plurality of elongated through holes.Next, a bicycle caliper assembly 400 according to a fourth embodiment of the present invention will be described with reference to FIGS. 16 to 20B. Here, elements having substantially the same function as in the first to third embodiments are numbered the same, and will not be described in detail again.Referring to FIG. 16, the bicycle caliper assembly 400 includes a caliper 410, a base member 420, the first coupling member 141, and the second coupling member 145. Unlike the above first to third embodiments, a banjo 481 is connected to the caliper 410 through the base member 420. The front fork 440 of the bicycle frame 14 includes a cavity 445 in which the banjo 481 is disposed.Like the caliper 110 of the first embodiment, the caliper 410 is configured to apply a braking force to a brake disc configured to be rotatable about the rotational axis A 1. The base member 420 is configured to be coupled to the brake caliper 410 and fixed to the bicycle frame 14 such that the relative position between the rotational axis A 1 of the brake disc and the brake caliper 410 is adjustable in the radial direction D 1 of the brake disc. The first coupling member 141 is configured to couple the caliper 410 to the base member 420. The second coupling member 145 is configured to couple the caliper 410 to the base member 420.Like the base member 120 of the first embodiment, the base member 420 includes the coupling portion 131 to which the caliper 410 is coupled. The base member 420 is secured to the bicycle frame 14 with a first orientation or a second orientation. The base member 420 is configured such that a position of the coupling portion 131 in a state where the base member 420 having the first orientation is fixed to the bicycle frame 14 (the front fork 40) is different from a position of the coupling portion 131 in a state where the base member 420 having the second orientation is fixed to the bicycle frame 14 in the radial direction D 1. That is, the base member 420 has substantially the same function as the base member 120 of the first embodiment.The coupling portion 131 includes the first through hole 132 and the second through hole 136. In FIG. 16, the first coupling member 141 passes through the first through hole 132, and the second coupling member 145 passes through the second through hole 136, and the second through hole 136 is spaced apart from the first through hole 132 in the radial direction D 1.The base member 420 further includes a cylindrical protrusion 431, an additional through hole 432, and an annular groove 433. The annular recess 433 is provided around the additional through hole 432 on the saddle-side contact surface 128. A third seal member 488 is provided in the annular groove 433 between the base member 420 and the caliper 410. The cylindrical protrusion 431 is provided on the frame-side contact surface 129 and protrudes from the frame-side contact surface 129 (FIG. 17 ). As seen in FIGS. 16 and 17, the additional through hole 432 passes through the main body 121 and the cylindrical protrusion 431.As seen in FIG. 16, a liquid communication member 490 passes through the additional through hole 432. The fluid communication member 490 is configured to be in fluid communication with the caliper fluid passage 58 (FIG. 3 ). The liquid communication member 490 is a hollow bolt for fastening the banjo 481 to the base member 420, and includes a shaft portion 491, an external thread 492, a head portion 493, and a liquid channel 495. The shaft portion 491 extends in a longitudinal direction of the liquid communication member 490. The male thread 492 is provided at an end of the shaft portion 491. The head portion 493 is provided at the other end of the shaft portion 491. The fluid passage 495 is formed in the fluid communication member 490 to fluidly communicate the banjo 481 with the caliper fluid passage 58 (FIG. 3 ).As seen in FIG. 16, the banjo 481 includes a through hole 482 through which the liquid communication member 490 passes. The hydraulic brake hose 86 is connected to the banjo 481. The banjo 481 further includes a first annular recess 483 disposed around the through hole 482. The first annular recess 483 is provided on a side closer to the cylindrical protrusion 431 of the base member 420. A first sealing member 487 is provided in the first annular groove 483 between the banjo 481 and the cylindrical protrusion 431.As seen in FIG. 17, the banjo 481 further includes a second annular recess 484 disposed around the through hole 482. The second annular recess 484 is provided on the opposite side of the first annular recess 483. A second sealing member 486 is provided in the second annular recess 484 between the banjo 481 and the head portion 493 of the liquid communication member 490.The caliper 410 includes an additional threaded bore 416 provided on a mounting rear 119. The external thread 492 of the fluid communication member 490 is threaded into the additional threaded bore 416. The additional threaded hole 416 is disposed at a middle position between the first threaded hole 117 and the second threaded hole 118. The additional threaded hole 416 is disposed at a position corresponding to the additional through hole 432 of the base member 420.As seen in FIGS. 18A to 18C, the additional through hole 432 is disposed at a middle position between the first through hole 132 and the second through hole 136. The distance L 41 between the center C 41 of the additional through hole 432 and the center C 12 of the first through hole 132 is substantially the same as the distance L 42 between the center C 41 of the additional through hole 432 and the center C 13 of the second through hole 136.Referring to FIG. 19, the banjo 481 includes a banjo fluid passage 489 in fluid communication with the hydraulic brake hose 86 The caliper 410 includes the caliper fluid passage 58 in fluid communication with the additional threaded bore 416. In a state where the banjo 481 is fixed to the base member 420 with the liquid communication member 490, a liquid passage space 499 is defined by the liquid communication member 490, the banjo 481, and the base member 420. Specifically, the liquid passage space 499 has a substantially cylindrical shape and is defined by the shaft portion 491, the banjo 481, and the additional through hole 432. The liquid passage space 499 is sealed with the first sealing member 487, the second sealing member 486, and the third sealing member 488. The liquid channel space 499 is in liquid communication with the banjo liquid channel 489. The liquid passage 495 of the liquid communication member 490 is configured to connect the liquid passage space 499 to the caliper liquid passage 58. Accordingly, the banjo fluid passage 489 is in fluid communication with the caliper fluid passage 58 via the fluid passage space 499 and the fluid passage 495.Referring to FIGS. 20A and 20B, the front fork 450 of the bicycle frame 14 includes a cavity 445 and a tube channel 446. The cavity 445 is formed between the threaded bores 43 and 44 to include the liquid communication member 490 and the banjo 481. The liquid communication member 490 and the banjo 481 are disposed in the cavity 445 in a state where the bicycle caliper assembly 400 is fixed to the front fork 440. The hose channel 446 extends along the front fork 440 from the cavity 445 to an upper portion of the front fork 440. The hose channel 446 includes an inlet opening (not shown) at the upper portion of the front fork 440. The hydraulic brake hose 86 extends through the hose passage 446 and is configured to connect the banjo 481 to the master cylinder 24 of the brake operating mechanism 23. The brake hydraulic hose 86 passes through the inlet port (not shown) of the hose passage 446 and is connected to the master cylinder 24 mounted on the handlebar 15 (FIG. 3 ).As seen in FIGS. 20A and 20B, the bicycle caliper assembly 400 may be in two different states corresponding to the brake disc 50 and the brake disc 55, respectively, having an outer diameter R 2 larger than the outer diameter R 1 of the brake disc 50, and the bicycle caliper assembly 100 of the first embodiment. Specifically, the base member 420 is configured to be coupled to the caliper 410 and fixed to the bicycle frame 14 such that the relative position between the rotational axis A 1 of the brake disks 50 and 55 and the caliper 410 is adjustable in the radial direction D 1 of the brake disks 50 and 55. The base member 420 is configured such that the first position P 11 of the coupling portion 131 in a state where the base member 420 having the first orientation is fixed to the bicycle frame 14 is different from the second position P 12 of the coupling portion 131 in a state where the base member 420 having the second orientation is fixed to the bicycle frame 14 in the radial direction D 1. In the fourth embodiment, the first and second positions P 11 and P 12 are defined based on the center line of the second threaded hole 118, for example.As seen in FIGS. 20A and 20B, the second distance L 18 corresponding to the second orientation is larger than the first distance L 17 corresponding to the first orientation. Thus, changing the orientation of the base member 420 relative to the front fork 440 and the caliper 110 allows the bicycle caliper assembly 400 to be adjusted for each of the brake disks 50 and 55 having different outer diameters R 1 and R 2. Since the additional through hole 432 is disposed at the middle position between the first through hole 132 and the second through hole 136, the liquid communication member 490 can be fixed to the base member 420 and the caliper 410 in a state where the base member 420 is coupled to the caliper 410 with the first orientation and the second orientation.Further, since the banjo 481 and the liquid communication member 490 are disposed in the cavity 445 of the front fork 440, the banjo 481, the liquid communication member 490 and the hydraulic brake hose 86 can be protected by the front fork 440.Next, a bicycle caliper assembly 500 according to a fifth embodiment of the present invention will be described with reference to FIGS. 21 to 24B. Here, elements having substantially the same function as in the first to fourth embodiments are numbered the same, and will not be described in detail again.In the fourth embodiment, the liquid communication member 490 is connected to the caliper 410 through the additional through hole 432 of the base member 420; however, the liquid communication member 490 may also serve as a coupling member configured to couple the base member to the caliper instead of the first coupling member 141 of the above embodiments. In this fifth embodiment, the first coupling member 490 is referred to as the liquid communication member 490. The first coupling member 490 has substantially the same function and structures as the liquid communication member 490 of the fourth embodiment.Referring to FIG. 21, the bicycle caliper assembly 500 includes a caliper 510, a base member 520, the first coupling member 490, and a second coupling member 545. Like the calipers of the above embodiments, the caliper 510 is configured to apply a braking force to a brake disk configured to be rotatable about the rotation axis A 1.The base member 520 is configured to be coupled to the caliper 510 and fixed to the bicycle frame 14 (the front fork 40) such that the relative position between the rotational axis A 1 and the caliper 510 is adjustable in the radial direction D 1. The first coupling member 490 is configured to couple the caliper 510 to the base member 520. The second coupling member 545 includes an external thread 546 and a head portion 547.The base member 520 is fixed to the bicycle frame 14 with a first orientation or a second orientation, just like the base member 120 of the first embodiment. The base member 520 includes a coupling portion 530 to which the caliper 510 is coupled.The base member 520 is configured such that a position of the coupling portion 530 in a state where the base member 520 having the first orientation is fixed to the bicycle frame 14 (the front fork 540) is different from a position of the coupling portion 530 in a state where the base member 520 having the second orientation is fixed to the bicycle frame 14 in the radial direction D 1.As seen in FIGS. 21 and 23A to 23C, the base member 520 includes a main body 521, the first end portion 122, the second end portion 123, and a coupling portion 530. The coupling portion 530 includes a first through hole 532, a first cylindrical protrusion 531, a first annular recess 533, a second through hole 536, a second cylindrical protrusion 535, and a second annular recess 537. The first cylindrical protrusion 531 is provided on the frame-side contact surface 129 and protrudes from the frame-side contact surface 129 (FIG. 22 ). The second cylindrical protrusion 535 is provided on the frame-side contact surface 129 and protrudes from the frame-side contact surface 129 (FIG. 22 ). The first through hole 532 passes through the first cylindrical protrusion 531 and the main body 521 (FIG. 23B ). The second through hole 536 passes through the second cylindrical protrusion 535 (FIG. 23B ). The first through hole 532 and the second through hole 536 are disposed at the same positions as the first through hole 132 and the second through hole 136 of the first embodiment in the base member 520. In FIGS. 21 and 22, the first coupling member 490 passes through the first through hole 532, and the second coupling member 545 passes through the second through hole 536.As seen in FIGS. 21 and 23C, the first annular recess 533 is provided around the first through hole 532 on the saddle-side contact surface 128. The second annular recess 537 is provided around the second through hole 536 on the caliper-side contact surface 128. The third seal member 488 is provided in one of the first annular recess 533 and the second annular recess 537 in a state where the base member 520 is coupled to the caliper 510.As seen in FIG. 21, the first coupling member 490 connects the banjo 481 and the base member 520 to the caliper 510. The first coupling member 490, the banjo 481, and the second coupling member 545 are provided in the cavity 548 of the front fork 540 of the bicycle frame 14 in a state where the bicycle caliper assembly 500 is fixed to the front fork 540.As seen in FIG. 22, the caliper 510 includes a first threaded hole 517 and the second threaded hole 118. The male thread 492 of the first coupling member 490 is screwed into the first threaded hole 517. The male thread 546 of the second coupling member 545 is screwed into the second threaded hole 118. The second coupling member 545 has substantially the same function as the first and second coupling members 141 and 145 of the first embodiment. The first coupling member 490 is configured to couple the caliper 510 to the base member 520 and provides the fluid passage 495 configured to communicate with the caliper fluid passage 58 (FIG. 24 ).Referring to FIG. 24, the banjo 481 includes the banjo fluid passage 489 in fluid communication with the hydraulic brake hose 86 The caliper 510 includes the caliper fluid passage 58 in fluid communication with the first threaded bore 517. In a state where the banjo 481 is fixed to the base member 520 with the first coupling member 490, a liquid passage space 599 is defined by the first coupling member 490, the banjo 481 and the base member 520. Specifically, the liquid passage space 599 has a substantially cylindrical shape and is defined by the shaft portion 491, the banjo 481 and the first through hole 532 (or the second through hole 536). The liquid passage space 599 is sealed with the first sealing member 487, the second sealing member 486 and the third sealing member 488. The liquid channel space 599 is in liquid communication with the banjo liquid channel 489. The fluid passage 495 of the first coupling member 490 is configured to connect the fluid passage space 599 to the caliper fluid passage 58. Accordingly, the banjo fluid passage 489 is in fluid communication with the caliper fluid passage 58 via the fluid passage space 599 and the fluid passage 495.Referring to FIGS. 25A and 25B, the front fork 540 of the bicycle frame 14 includes the cavity 548 and a tube channel 549. The cavity 548 is formed between the threaded bores 43 and 44 to include the first coupling member 490, the banjo 481, and the second coupling member 545. The first coupling member 490, the banjo 481, and the second coupling member 545 are disposed in the cavity 548 in a state where the bicycle caliper assembly 500 is fixed to the front fork 540. The hose channel 549 extends along the front fork 540 from the cavity 548 to an upper portion of the front fork 540. The hose channel 549 includes an inlet opening (not shown) at the upper portion of the front fork 540. The hydraulic brake hose 86 extends through the hose passage 549 and is configured to connect the banjo 481 to the master cylinder 24 of the brake operating mechanism 23. The brake hydraulic hose 86 extends through the inlet port (not shown) of the hose passage 549 and is connected to the master cylinder 24 mounted on the handlebar 15 (FIG. 3 ).As seen in FIGS. 25A and 25B, the bicycle caliper assembly 500 may be in two different states corresponding to the brake disc 50 and the brake disc 55, respectively, having an outer diameter larger than the outer diameter of the brake disc 50, just like the bicycle caliper assembly 100 of the first embodiment. Specifically, the base member 520 is configured to be coupled to the caliper 510 and fixed to the bicycle frame 14 such that the relative position between the rotational axis A 1 of the brake disks 50 and 55 and the caliper 510 is adjustable in the radial direction D 1 of the brake disks 50 and 55. The base member 520 is configured such that the first position P 11 of the coupling portion 530 in a state where the base member 520 having the first orientation is fixed to the bicycle frame 14 is different from the second position P 12 of the coupling portion 530 in a state where the base member 520 having the second orientation is fixed to the bicycle frame 14 in the radial direction D 1. In the fifth embodiment, the first and second positions P 11 and P 12 are defined based on the center line of the second threaded hole 118, for example.As seen in FIGS. 25A and 25B, the second distance L 18 corresponding to the second orientation is larger than the first distance L 17 corresponding to the first orientation. Thus, changing the orientation of the base member 120 relative to the front fork 540 and the caliper 510 allows the bicycle caliper assembly 500 to be adjustable for each of the brake disks 50 and 55 having different outer diameters R 1 and R 2. Since the first coupling member 490 has a function as both the liquid communication member 490 and the first coupling member 141, the number of components or parts can be reduced, whereby the cost of the bicycle disc brake device can be reduced.Further, since the banjo 481 and the first coupling member 490 are disposed in the cavity 548 of the front fork 540, the banjo 481, the first coupling member 490 and the hydraulic brake hose 86 can be protected by the front fork 440.In understanding the scope of the present invention, the following directional formulas "front", "rear", "forward", "rearward", "left", "right", "up" and "down" as used herein to describe the above embodiments, as well as other similar directional formulas, refer to those directions determined with respect to a cyclist who sits on the saddle of a bicycle and faces the handlebar of the bicycle. Thus, these terms, when used to describe the bicycle caliper assembly, should be interpreted relative to a bicycle equipped with the bicycle caliper assembly used in an upright seating position on a horizontal surface.As used herein, the term "comprising" and its derivatives are intended to be open terms that specify the presence of stated features, elements, components, groups, integers, and / or steps, but do not preclude the presence of other unspecified features, elements, components, groups, integers, and / or steps. This definition also applies to words of similar meaning, such as the terms "comprise", "contain" and their derivatives.The terms "component", "region", "portion", "part" or "element" when used in the singular may have the double meaning of a single part or multiple parts.Finally, terms of degree such as "substantially", "about" and "about" as used herein mean an adequate amount of deviation from the modified term such that the end result is not significantly changed.It will be apparent that numerous modifications and variations of the present invention are possible in light of the above teachings. Therefore, it is to be understood that within the scope of the appended claims, the invention may be practiced otherwise than as specifically described herein.REFERENCE NUMERALS10 Bicycle 12 Bicycle disc brake device 13 Main frame 14 Bicycle frame 15 Handlebar 16 Brake operating mechanism 17 Front wheel 24 Master cylinder 26 Clamp 28 Brake lever 32 Master cylinder bore 34 Master piston 36 Hydraulic fluid reservoir 38 Outlet 40 Front fork 41 Mounting portion 42 Support surface 43 Threaded bore 44 Threaded bore 50 Brake disc 55 Brake disc 57 Cylinder 58 Caliper fluid passage 59 Fluid chambers 60 Front hub body 74 Cylinder 76 Brake pad 86 Hydraulic brake hose 87 Banjo 100 Bicycle caliper assembly 110 Brake caliper 112 Housing 114 Slot 115 Connection port 116 Vent port 117 First threaded bore 118 Second threaded bore 119 Mounting back surface 120 Base member 121 Main body 122 First end portion 123 Second end portion 124 First mounting through hole 125 Second mounting through hole 128 Caliper-side contact surface 129 Frame-side 131 Coupling portion 132 First through hole 133 First tapered surface 136 Second through hole 137 Second tapered surface 141 First coupling member 142 First external thread 143 First countersunk head 145 Second coupling member 146 Second external thread 147 Second countersunk head 151 First fixing member 152 First external thread 153 First hexagon socket head 155 Second fixing member 156 Second external thread 157 Second hexagon socket head 200 Bicycle caliper assembly 220 Base member 221 Main body 230 First coupling portion 231 First through hole 232 First tapered surface 233 Third through hole 234 Third tapered surface 235 Second coupling portion 236 Second through hole 237 Second tapered surface 238 Fourth through hole 239 Fourth tapered surface 300 Bicycle caliper assembly 320 Base member 321 Main body 333 Elongated through hole 334 A tapered surface 400 of a bicycle caliper assembly 410 of a caliper 416 of an additional threaded hole 420 of a base member 431 of a cylindrical protrusion 432 of an additional through hole 433 of an annular recess 440 of a front fork 445 of a cavity 446 of a hose passage 481 of a banjo 482 of a through hole 483 of a first annular recess 484 of a second annular recess 486 of a second sealing member 487 of a first sealing member 488 of a third sealing member 489 of a banjo liquid passage 490 of a liquid communication member / of a first coupling member 491 of a shaft portion 492 of an external thread 493 of a head portion 495 of a liquid passage 499 of a liquid passage space 500 of a bicycle caliper assembly 510 of a caliper 517 of a first threaded hole 520 of a base member 521 of a main body 530 of a coupling portion 531 of a first cylindrical protrusion 532 of a first through hole 533 of a first annular recess 535 of a second cylindrical protrusion 536 of a second through hole 537 of a second annular recess 540 front fork 545 second coupling member 546 external thread 547 head portion 548 cavity 549 hose passage 599 liquid passage 600 bicycle caliper assembly 610 caliper 620 base member 621 first mounting through hole 622 second mounting through hole 623 third mounting through hole 624 fourth mounting through hole 700 bicycle caliper assembly 720 base member 721 first mounting through hole 722 second mounting through hole A1 rotation axis C11 center C12 center C13 center C14 center C21 center C22 center C23 center C24 center C41 center D1 radial direction D2 axis direction D3 longitudinal direction D4 transverse direction L11 distance L12 distance L13 distance L17 first distance L18 second distance L 21 distance L 22 distance L 23 distance L 24 distance L 25 distance L 27 first distance L 28 second distance L 37 first distance L 38 second distance L 41 distance L 42 distance P 11 first position P 12 second position P 21 first position P 22 second position P 31 first position P 32 second position P 61 first position P 62 second position P 71 first position P 72 second position R 1 outer diameter R 2 outer diameter T 1 thickness T 2 thickness

Claims

A bicycle caliper assembly (400, 500) comprising: a caliper (410, 510) configured to apply a braking force to a brake disc (50) configured to be rotatable about an axis of rotation (A1); and a base member (420, 520) configured to be coupled to the brake caliper (410, 510) and attached to a bicycle frame (14) such that the relative position between the rotational axis (A1) of the brake disc (50) and the brake caliper (410, 510) is adjustable in a radial direction (D1) of the brake disc (50), wherein the brake caliper (410, 510) is a hydraulically operated brake caliper and comprises a caliper fluid channel (58), wherein the base member (420, 520) comprises at least one through hole (432, 532, 536), wherein the bicycle brake caliper assembly (400, 500) further comprises a fluid communication member (490) which passes through the or one of the through holes (432, 532, 536) and is in fluid communication with the brake caliper fluid channel (58).The bicycle caliper assembly (400, 500) according to claim 1, wherein the base member (420, 520) comprises a coupling portion (131, 530) to which the caliper (410, 510) is coupled, the base member (420, 520) is attachable to the bicycle frame (14) at a first orientation or a second orientation, and the base member (420, 520) is configured such that a first position (P11) of the coupling portion (131, 530) in a state in which the base member (420, 520) having the first orientation is attached to the bicycle frame (14) is different from a second position (P12) of the coupling portion (131, 530) in a state in which the base member (420, 520) having the second orientation is attached to the bicycle frame (14) in the radial direction (D1).The bicycle caliper assembly (400, 500) according to claim 2, wherein the bicycle caliper assembly (400, 500) comprises a first coupling member (141, 490) configured to couple the caliper (410, 510) to the base member (420, 520), wherein the coupling portion (131, 530) comprises a first through hole (132, 532) through which the first coupling member (141, 490) passes.The bicycle caliper assembly (400, 500) according to claim 3, wherein the bicycle caliper assembly (400, 500) comprises a second coupling member (145, 545) configured to couple the caliper (410, 510) to the base member (420, 520), wherein the coupling portion (131, 530) comprises a second through hole (136, 536), through which the second coupling member (145, 545) passes, and which is spaced apart from the first through hole (132, 532) in the radial direction (D1).The bicycle caliper assembly (400) according to claim 4, wherein the fluid communication member (490) is different from the coupling members (141, 145), and the through-holes (132, 136) for the coupling members (141, 145) are different from the through-hole (432) for the fluid communication member (490).The bicycle caliper assembly (400) according to claim 5, wherein the through hole (432) for the liquid communication member (490) is disposed at a middle position between the first through hole (132) and the second through hole (136).The bicycle caliper assembly (500) according to claim 3 or 4, wherein the liquid communication member (490) serves as the first coupling member (490) and passes through the first through hole (532) or passes through the second through hole (536).The bicycle caliper assembly (400, 500) according to any one of the preceding claims, wherein the base member (420, 520) has at least one cylindrical protrusion (431, 531, 535) on the frame-side contact surface (129) of the base member (420, 520), and the at least one through hole (432, 532, 536) for the liquid communication member (490) passes through the cylindrical protrusion (431, 531, 535).The bicycle caliper assembly (400, 500) according to any one of the preceding claims, wherein the base member (420, 520) has at least one annular recess (433, 533, 537) on the caliper-side contact surface (128) of the base member (420, 520), and the at least one through hole (432, 532, 536) for the liquid communication member (490) passes through the annular recess (433, 533, 537), wherein a sealing member (488) is provided in the annular recess (433, 533, 537).The bicycle caliper assembly (400, 500) of any preceding claim, wherein the fluid communication member (490) is a hollow bolt and is configured to attach a banjo (481) of a hydraulic brake hose (86) to the base member (420, 520) and to establish fluid communication between the banjo (481) and the caliper fluid passage (58).The bicycle caliper assembly (400, 500) according to claim 10, wherein the fluid communication member (490) includes a shaft portion (491), an external thread (492), a head portion (493), and a fluid channel (495), the shaft portion (491) extending in a longitudinal direction of the fluid communication member (490), the external thread (492) being provided at one end of the shaft portion (491), and the head portion (493) being provided at the other end of the shaft portion (491), the fluid channel (495) being formed in the fluid communication member (490) so as to fluidly connect the banjo (481) to the brake fluid channel (58).A bicycle (10) comprising a bicycle frame (14), a brake operating mechanism (16), a bicycle caliper assembly (400, 500) according to any one of the preceding claims, and a hydraulic brake hose (86) coupling the brake operating mechanism (16) to the bicycle caliper assembly (400, 500), and the hydraulic brake hose (86) is hydraulically connected to the bicycle caliper assembly (400, 500) via a banjo (481) and the fluid communication member (490).The bicycle (10) according to claim 12, wherein the bicycle frame (14) comprises a cavity (445) and a hose channel (446), wherein the fluid communication member (490) and the banjo (481) are at least partially provided in the cavity (445), and the brake hose (86) extends through the hose channel (446).

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