Abstract: Land vehicles and methods of operating land vehicles are disclosed. A land vehicle includes a frame structure, a plurality of wheels, and a brake system. The frame structure includes a front cage that at least partially defines an operator cabin and a rear compartment positioned rearward of the front cage in a longitudinal direction. The plurality of wheels are supported by the frame structure. Each of plurality of wheels is sized to permit direct integration of an electric motor therein.

Abstract: An electro-mechanical brake and a vehicle including the same are provided. As an electro-mechanical brake according to an aspect of the present invention, an electro-mechanical brake including a pair of brake pads disposed on both sides of a disc, may include a motor that provides a rotational driving force; a rotating screw that rotates about a second rotating shaft parallel to a first rotating shaft of the motor; a power transmission unit that transmits the rotational driving force of the motor to the rotating screw; and a piston that is coupled to the rotating screw to be able to move forward and backward to press the disc with the brake pads.

Abstract: A caliper body of a brake caliper has supports for supporting thrust devices, brake pads or at least one attaching element, and feeding pipes for supplying the thrust devices, the supports and feeding pipes being made of a first material capable of withstanding high pressures, and at least one inner body portion made of a second material adapted to incorporate the supports and feeding pipes and obtain shapes having complex geometry for distributing stress received from the supports and feeding pipes. The at least one inner body portion forms a first vehicle side elongated element facing a first braking surface, and a second wheel side elongated element facing a second braking surface opposite to the first braking surface. The caliper body has at least one outer body portion made of a third material adapted to form a reinforcement with mechanical resistance.

Abstract: Disclosed is an electromechanical brake including a piston provided to advance and retreat to press a brake pad, a power conversion unit including a spindle provided to rotate by receiving a driving force from an actuator, a nut connected to the spindle to advance or retreat inside the piston depending on rotation directions of the spindle to advance or retreat the piston, and a return means provided to forcibly retreat the piston when the nut retreats, wherein the return means includes a locking protrusion provided to protrude in a radial direction from an outer surface of the nut, and a groove portion provided on an inner surface of the piston to allow the locking protrusion to be inserted.

Abstract: A two-stage actuation mechanism for a brake system includes a first lead screw having a first plurality of threads, a second lead screw having a second plurality of threads, a preloaded torsional spring, and an actuator assembly having an input shaft coupled with the preloaded torsional spring of the two-stage actuation mechanism. The preloaded torsional spring is configured to activate a first stage of movement of the two-stage actuation mechanism via rotation of the first lead screw. The size and pitch of each of the first and second lead screws are configured to minimize power consumption by the actuator assembly and satisfy a desired actuation time with a low current consumption and high actuator gear train ratio.

Abstract: A hydraulic vehicle brake includes a housing and first and second brake pistons at least partially located within the housing. The brake pistons are configured to cooperatively press a common friction pad against a rotor of the vehicle brake. Each of the pistons is a hollow piston including a substantially solid piston bottom. A clamp beam laterally spans the piston bottoms of the first and second pistons within the housing. The clamp beam is configured to selectively apply longitudinally directed clamping force upon the pistons. A spindle is selectively driven for rotational motion by an electric motor. The spindle is interposed laterally between the first and second brake pistons within the housing. The spindle is configured to reciprocate the clamp beam longitudinally within the housing responsive to a direction of the rotational motion.

Abstract: A braking device including: a piezoelectric element; and a braking portion. The braking portion is configured to be fixed to a member when the piezoelectric element is in a first state, and to be slidable along the member when the piezoelectric element is in a second state. The piezoelectric element changes from one state to another state when a voltage is applied.

Abstract: A brake device is configured to apply a braking force to a rotary body of a human-powered vehicle. The brake device includes a power transfer medium operated braking portion, a first actuator and a second actuator. The first actuator is operatively coupled to the power transfer medium operated braking portion by a power transfer medium. The second actuator is operatively coupled to the first actuator and operated by electric power in accordance with an input to an operating device.

Abstract: The brake control device controls a hydraulic brake to generate hydraulic braking force on both the front and rear wheels of a four-wheel-drive vehicle, and an electrical parking brake to generate parking brake force, different from the hydraulic braking force, on the front or rear wheels. The brake control device includes: a detection unit that detects parking brake operation for causing the electrical parking brake to generate a parking brake force; and a control unit for reducing the hydraulic braking force generated on the front wheels or the rear wheels and adjusting the hydraulic braking force on the other of the front wheels or the rear wheels to a magnitude allowing a stationary vehicle state to be maintained, before a parking brake force is generated by the electrical parking brake, when a parking brake operation is detected while a stationary state is being maintained solely by the hydraulic braking force.

Abstract: An electric parking brake for a vehicle brake system includes a caliper, a piston, a spindle, an adjuster nut, a ring-like member affixed to the piston, and a biasing member. The piston may be disposed within a cavity of the caliper. The spindle is configured to drive the axial movement of the adjuster nut between a retracted position and an extended position via a threaded engagement wherein the adjuster nut is disposed within the piston. The biasing member may be disposed between the ring-like member and the adjuster nut so that, as the adjuster nut moves from an extended position to a retracted position which corresponds to a control signal, the biasing member urges the piston away from the rotor.

Abstract: A securing device for a rotatably mounted object with at least one receiving unit, which is fixed against rotation on a first component of the object with at least one clamping unit which is fixed against rotation to a second component of the object, which manually or by means of a rotary drive is moveable relative to the first component via a rotatably mounted joint about a rotational and/or swivel axis, and with at least one drive unit through which the clamping unit can be transferred from a release position, in which the first component and the second component are released for rotation relative to each other to a clamping position, in which the clamping unit frictionally and/or non-positively engages in the receiving unit, and the first component and the second component are fixed relative to each other against rotation about the rotary and/or swivel axis.

Abstract: A hydraulic caliper assembly includes a caliper brake housing including two opposing pairs of two piston assemblies, each of the pairs of two piston assemblies adapted to place a respective stator assembly of a pair of stator assemblies in a braking position, where the caliper brake housing is a unitary, cast component having an internal fluid porting system fluidly coupling each of the piston assemblies with a source of hydraulic fluid, and where each of the piston assemblies have a common configuration.

Abstract: A brake caliper (1) for a disc brake has a tensioning side (2) and a rim side (3) and bears a brake cylinder flange face (4), which, for receiving a brake cylinder, is disposed on the tensioning side (2). Two sliding bushes (5, 6) for an axial displacement of the brake caliper (1) are disposed on a brake support, and two flange faces (8, 8a) are disposed axially parallel to each other on the tensioning side (2) between the sliding bushes (5, 6) for receiving a sensor resetting unit (9).

Abstract: A brake carrier casting and a method of making a brake carrier casting. The brake carrier casting may have a first side portion and a second side portion that may be connected by a first bridge and a second bridge. The first side portion, second side portion, first bridge, and second bridge may define an opening of the brake carrier casting.

Abstract: A retraction spring assembly having: a) pad clip having a lock channel and one or more assembly locks; b) a retraction spring affixed to the pad clip with two or more lock arms residing within the lock channel and a plurality of energy storage portions; and first and second retraction arms; wherein the one or more assembly locks are configured to receive the two or more lock arms and bias the retraction spring into an assembly position; during the brake apply, movement of the first and second retraction arm is toward each other and results in energy being stored in the body portion; and during the brake release, the energy stored in the body portion is released and transferred to both the first and second retraction arm to result in movement of the first retraction arm and the second retraction arm away from each other.

Abstract: A system and method for detecting a start and end of section keystrokes, measuring a section time between the start and end of section keystrokes; aggregating the measured section time with previously measured section times; comparing the aggregate of the measured section times with a section target time; and sending an alert when a difference between the aggregate of the measured section times and the section target time is greater than a predetermined threshold.

Abstract: A floating caliper brake assembly comprising: a caliper housing that is movable between a brake on position and a brake off position; a support bracket at least partially enclosed by the caliper housing and configured to extend around a rotor of a vehicle, the caliper housing being in communication with and movable relative to the support bracket, wherein the caliper housing has one or more fingers that extend radially downward and cover the support bracket so that when the brake assembly is viewed from an outboard side along an axis coaxial with, or substantially parallel to, an axis of rotation of the rotor the support bracket is obscured from view.

Abstract: A caliper guide pin assembly has a tubular guide pin, a cap, a grease valve and a plurality of lubricating grooves; the plurality of lubricating grooves are radially distributed about the tubular guide pin; each of the plurality of lubricating grooves normally traverses into the tubular guide pin from an external surface of the tubular guide pin; each of the plurality of lubricating grooves traverses into the tubular guide pin from a front surface of the tubular guide pin; the cap is concentrically positioned with the tubular guide pin; the cap is positioned about the tubular guide pin, adjacent to the front surface of the tubular guide pin; the grease valve is positioned adjacent to the cap, opposite to the tubular guide pin; the grease valve is adjacently integrated into the cap; the grease valve is in fluid communication with each of the plurality of lubricating grooves.

Abstract: There is provided a brake assembly structure for a transmission. An automatic transmission includes a torque converter, a transmission case, and a two-way clutch and a first brake which are accommodated in the transmission case and adjacent to each other. The first brake includes a drum, an outer plate that is fixed to the drum in such a manner that the outer plate is unrotatable with respect to the drum, an inner disk that comes in contact with the outer plate in an axial direction, and a hub to which the inner disk is fixed in such a manner that relative rotation is not permitted. The drum is provided separately from the transmission case and includes a hydraulic chamber. The two-way clutch is assembled in the transmission case and the first brake is then assembled in the transmission case.

Abstract: A discharge check valve assembly for a compressor having a discharge opening. The discharge check valve assembly includes a valve body adapted to be positioned at the discharge opening of the compressor. A discharge tube is assembled to the valve body, and a check valve member is disposed in the valve body. In certain embodiments, the check valve member is biased in a closed position by a biasing spring. A weld block member is positioned at an interface between the valve body and the discharge tube, and a first weld couples the discharge tube and the valve body at a first weld point.

Abstract: A thin-walled piston having a multi-part construction for a brake caliper, the piston having a one-piece design with the form of a pot, which is open on one side, a longitudinal axis, a wall and a piston floor, and which can be applied in the region of the piston floor with an axial contact surface to a brake lining, wherein a tubular insert with a cone is fixed in the interior of the piston, the insert forming a bearing for a bushing.

Abstract: A bicycle disc brake caliper comprises a caliper body. The caliper body includes a slot in which a brake pad is arranged. The caliper body includes a first body portion, a second body portion, a mounting surface, a first receiving hole, a cylinder bore, and a second cylinder bore. The second body portion is coupled to the first body portion so as to provide a slot therebetween. The mounting surface is configured to face a pipe portion of a bicycle body in a mounted state where the bicycle disc brake caliper is mounted to the bicycle body. The first receiving hole is provided on the mounting surface. The first receiving hole is configured to be threadedly engaged with a fastener to mount the bicycle disc brake caliper to the bicycle body. The first cylinder bore is provided on the first body portion. The second cylinder bore is provided on the first body portion.

Abstract: A vehicle brake system, comprising a hydraulically controllable disk brake device, which has an electromechanical actuating device for activating a parking brake function, wherein the vehicle brake system has a hydraulic circuit having a hydraulic pressure source and controllable hydraulic functional elements in order to hydraulically control the disk brake device according to a service brake action of a driver or according to an automatic activation of a driving assistance system, wherein the vehicle brake system further comprises a control device in order to control the electromechanical actuating device according to a parking brake action of the driver or according to an automatic activation of the parking brake function.

Abstract: A brake pad for a disc brake with decreased wear characteristics is provided. The brake pad is configured with the distribution of brake pad friction material weighted toward the radially outer region of the brake pad, with the lateral sides of the pad material being generally aligned with radial lines originating at the rotation axis of the brake disc of the disc brake. The brake pad friction material distribution results in decreased brake application pressure between the brake pad and the brake disc while obtaining the same braking force provided by a comparable generally rectangular brake pad, resulting in lower brake pad wear at the same braking force levels.

Abstract: One embodiment provides a vehicle disc brake including: a caliper body; a caliper bracket having a pair of caliper support arms; a pair of friction pads; and a pad return spring. Each caliper support arm has a pair of pad guide grooves, and a pair of lug pieces extending from the friction pad are supported movably therein. An outer surface of each lug piece is stepped such that a projecting length on a radially outer side is shorter than a projecting length on a radially inner side, thereby defining a space portion between the lug piece and the pad guide groove. A first imaginary line, which is defined to pass a gravity center of the friction pad and to intersect perpendicularly a center line connecting a center of a disc rotor and a center of a piston, passes the space.

Abstract: A plurality of motors, which drive plurality of axes of multi-axis robot, respectively; plurality of power converters, which control operation of plurality of motors, respectively, by supplying and controlling electric power to plurality of motors; drive circuits, each of which drives first semiconductor switching elements included in a corresponding one of power converters by outputting drive signals to control terminals of first semiconductor switching elements in accordance with control signals for controlling operation of the motors; shut-off circuit provided at non-end position in an electrical path, through which first operating power is supplied to drive circuits; and shut-off control circuit, which outputs shut-off signals to shut-off circuit.

Abstract: A disc brake assembly comprises: an anchor bracket having at least one bore formed therein, the bore defining a first axis; a brake caliper slidably secured to the anchor bracket; a pair of brake pads carried by the disc brake assembly; and at least one guide pin adapted to be disposed in the bore of the anchor bracket, the at least one guide pin defining a second axis; wherein when the at least one guide pin is disposed in the at least one bore of the anchor bracket, the second axis of the at least one guide pin is configured to be offset relative to the first axis of the at least one bore such that there is provided at least one defined point of contact between only a portion of a shank portion of the at least one guide pin and a portion of an inner surface of the at least one bore.

Abstract: A flow formed part includes a first end, a second end, and a side wall extending therebetween. A reinforcing member is disposed around the second end. The side wall has a profile formed along an inner surface of the side wall. The profile is adapted to be substantially burr free after windows are formed in the sidewall. A method of making a flow formed part includes the steps of disposing a preform on a tailstock, providing a plurality of rollers adjacent the tailstock, providing a mandrel having an outer surface including a plurality of alternating channels and protuberances, and causing the rollers to press the preform against the outer surface of the mandrel.

Abstract: The invention relates to a method for producing a friction element (3) comprising the steps: providing a metal main body (10), hardening the main body (10) on at least part of its surface (11, 12) in a salt bath, wherein the salt bath hardening is the final method step, and no further processing of the hardened surface (11, 12) is performed. Furthermore, the invention relates to a friction element produced according to this method and a friction component comprising the latter.

Abstract: A stabilized rubber mounted drivetrain includes a standard rubber mounted drivetrain, further comprising a swingarm pivotal axle, rubber isolators, support brackets; and swingarm stabilizers, which each further include a stabilizer cap, a thrust bearing, and a spacer, such that a swingarm stabilizer is mounted to both ends of the swingarm pivot axle. The stabilized rubber mounted drivetrain provides increased stability of the rubber isolators and the swing arm pivotal axle, to ensure the drivetrain is held in place during driving events with lateral forces. The stabilizer cap can include a stabilizer cap head, a stabilizer cap flange, and a stabilizer cap body, and can be machined from one piece of a metal alloy or assembled from separate parts.

Abstract: A method for controlling a robot that has a plurality of articulation axes, with at least one axis that includes a drive mechanism for moving the axis and a holding brake for limiting movement of the axis. The method includes closing the holding brake and at least one of opening the holding brake after the closing step based on an axial load, or opening the holding brake for a specified duration. In addition, or alternatively, closing of the holding brake may be delayed for a period of time. The holding brake may be closed in response to the detection of a monitoring-related condition of the robot.

Abstract: A vehicle braking system having a master cylinder and first and second hydraulic braking circuits including respective first and second wheel cylinders for braking first and second wheels. The master cylinder has first and second outlets, first and second pistons associated with the first and second outlets, a fluid reservoir and a master cylinder input member provided with a mechanical coupling to drive the first piston and configured to drive the second piston only through movement of hydraulic fluid. The second hydraulic braking circuit is selectively disengageable from the master cylinder via a separation valve. The second hydraulic braking circuit includes a line coupling a suction side of a pump with the master cylinder reservoir. A pressure control valve is configured to modulate the amount of fluid drawn from the reservoir by the pump. The second hydraulic braking circuit is coupled to the first outlet of the master cylinder.

Abstract: The invention relates to a disk brake, in particular for commercial vehicles, comprising a brake pad, a brake application device for pressing the brake pad against a brake disk, a pressure plate, by way of which the brake application device presses the brake pad against the brake disk during the braking process, and comprising an inclined guide, which during braking guides the pressure plate along a path located transversely to the brake axis. The pressure plate is provided with a protrusion, and the brake pad is provided with a recess, which accommodates the protrusion when assembled.

Abstract: A device comprising: a caliper comprising: one or more piston bores housing a piston; an outboard pad retainer; a bridge; and a shoulder; wherein the caliper is attached directly to a knuckle of an automobile via the shoulder

Abstract: An embodiment discloses a vehicle disc brake including a caliper body, a banjo and a banjo bolt. An acting portion of the caliper body has a cylinder bore accommodating a piston. The caliper body is formed through a gravity casting method. A gate mark is formed on the bottom wall of the cylinder bore as a result of cutting the gate after the caliper body has been cast, and the gate mark includes a worked surface and a projecting surface. A union hole communicating with a hydraulic pressure chamber and a locking hole receiving the locking projection of a banjo are opened in the worked surface. And, an uneven portion is provided between the worked surface and the projecting surface.

Abstract: A wrought aluminium alloy product having the following chemical composition, expressed in wt %: 1.3%?Si?12%, 1.35%?Fe?1.8% wherein the total Fe+Si content is higher than 3.4%, preferably 3.6%; 0.15%?Cu?6%; 0.6%?Mg?3%; optionally, one or more of the following elements: Mn?1%; Cr?0.25%; Ni?3%; Zn?1%; Ti?0.1%; Bi?0.7%; In?0.7%; Sn?0.7%; other elements <0.05% each and 0.15% in total; and the balance aluminium.

Abstract: A pressing part is provided at a disk-circumferentially central portion of a base plate member of a shim plate. The pressing part presses a friction pad at the center in the disk circumferential direction of the friction pad when a piston starts to press the friction pad. The pressing part is formed by slitting and raising the disk-circumferentially central portion of the shim plate along the disk radial direction. When the pressing force of the piston is in a low pressure range, the pressing force is transmitted to the friction pad through the pressing part. After the pressing force of the piston has exceeded the low pressure range, the pressing force is transmitted to the friction pad through the whole region in the disk circumferential direction of the piston.

Abstract: A disk brake pad includes a lining and a back plate supporting the lining. A first side part of the back plate in the circumferential direction includes a guided portion configured to engage movably in the axial direction with a guiding portion of a pad support member. The guided portion is disposed at a position more inward in the radial direction than a line of action of a brake tangential force applied in braking, so as to support a brake tangential force applied toward a second side part of the back plate in the circumferential direction in braking. The back plate is configured to support a brake tangential force applied toward the first side part in braking at a portion thereof that exists more outward in the radial direction than the line of action of the brake tangential force.

Abstract: A brake apparatus for a vehicle according to the present invention may comprise: a caliper body in which a hydraulic chamber is formed; a motor unit mounted in the caliper body; a gear unit coupled with the motor unit; a spindle unit coaxially coupled with the gear unit; a first piston which is movably mounted in the hydraulic chamber, receives a working fluid therein, and is associated with the brake pad; and a second piston movably coupled with the spindle unit for pressurizing the first piston by the working fluid as the second piston is moved toward inside the first piston.

Abstract: A hydraulic brake hose structure is basically provided with a hydraulic brake hose and a first sealing material. The hydraulic brake hose has a first end with a first opening and a second end with a second opening. The first sealing material overlies the first opening of the first end to form a first seal that seals the first opening of the first end. The first sealing material ruptures at a prescribed hydraulic fluid pressure threshold.

Abstract: A disc brake pad includes a lining and a back plate supporting the lining and having a projecting lug portion and a torque transfer surface. The projecting lug portion projects towards a rotor exit side. The torque transfer surface is disposed at a side edge portion which is situated further radially inwards than the lug portion. The projecting lug portion includes a first projecting arc-shaped surface portion which is disposed at a radially innermost portion of a radially inner surface of the lug portion. A portion of the torque transfer surface which lies near to a radially outer end of the torque transfer surface and which is situated further radially inwards than both of the radially inner surface and an action line of a brake tangential force exerted on braking is most projected toward the rotor exit side on the torque transfer surface.

Abstract: Provided is a brake apparatus for an electric corner module (ECM) including: a housing; a shaft, of which both ends are accommodated in accommodation portions of the housing; a planet gear connected to the shafts; and a driving unit that transmits power to the shaft, moves the planet gear in an axial direction and induces friction between the housing and the planet gear. That is, in a brake apparatus for an ECM, a planet gear is moved in an axial direction using a driving unit so as to induce friction between a housing and the planet gear and thus confinement forces of the planet gear are generated so that a brake function can be implemented by blocking power transmission using a decelerator and the weight of a wheel can be reduced and the size of a power transmission system can be reduced and optimization of packaging can be implemented.

Abstract: This invention relates to a brake caliper adapted for use in a vehicle disc brake assembly and method and apparatus for producing the same. The method for producing the brake caliper comprises the steps of: (a) providing a mold member having at least two mold sections; (b) providing a core member having at least a first male extension which is adapted to form an integrally cast locating recess in the brake caliper which is used as a locating surface for subsequent machining of the brake caliper; (c) disposing the core member in the mold member in a predetermined position; (d) supplying a suitable material to the mold member so as to form a brake caliper within the mold; (e) removing the brake caliper from the mold, wherein the brake caliper includes an integrally cast locating recess formed therein by the first male extension of the core member; and (f) machining the brake caliper using at least the integrally cast locating recess formed therein as a locating surface.

Abstract: A disk brake includes a caliper body having a cylinder portion (25) with a cylindrical shape. The cylinder portion (25) has a bore (30) with a bottom (34) formed by integrally joining together an opening peripheral edge (98) at the bottom side of the cylinder portion (25) and a bottom cover member (92) to be fitted to the opening peripheral edge (98) through friction stir welding. The bottom cover member (92) has a disk shape and is friction-stir-welded along the outer periphery thereof. The terminating point of the friction stir welding is within the boundaries of the bottom cover member (92).

Abstract: Disc brake piston cap (3) interposed between the caliper (1) and the piston (2) to protect the piston (2). The cap (3) has a bulge (351) on the inner fold (35) which is engaged in the groove (22) of the piston (2), and has an overmolded insert (31) fixed to the annular groove (11) of the caliper. The folded cap (3), with the overmolded insert (31), intermediate folds (33, 34) and an outer fold (32), comprises longitudinal ribs (352) on the face of the inner fold (35) to stiffen this fold and allow air to pass from the inside to the outside around the bulge (351) of the inner fold (35), housed in the groove (22).

Abstract: A disk brake and a method of making the disk brake capable of improving the efficiency of manufacturing a caliper. A bottom portion (41) of a bore (40) is formed by integrally welding an opening surrounding portion at the bottom portion side of a cylinder portion (35) and a bottom cover member (92) fitted to the opening surrounding portion by friction stir welding. The bottom cover member is formed into a disk shape, and provided with a protrusion (68) at one surface side facing the interior of the bore. An inflow hole (58), for a supply of a fluid pressure into the bore, is formed within the range of the protrusion to establish communication between an interior surface (71) of the protrusion and an outer surface (63) of the bore.

Abstract: According to one embodiment, a vehicle disc brake includes a caliper body, pistons and a pair of friction pads. The caliper body has a pair of operation arms and a bridge portion. Each operation arm has a cylinder bore and a pair of pad guide grooves. The pistons are each inserted into the corresponding cylinder bore. Each friction pad has a lining and a back plate. Each friction pad further includes a pair of lug pieces and a projection. The lug pieces are accommodated in the pad guide grooves so that the friction pads are movable in an axial direction of a disc rotor. The projection is provided so as to be positioned inside an opening portion of the piston with a gap from an inner circumferential surface thereof.

Abstract: A hub arrangement has hub parts which are rotatable relative to one another. Each hub is assigned a braking device, which is actuatable jointly with the braking device of the respective other hub.

Abstract: A pressure plate comprising: one or more pin holes that include: (a) a leading end; (b) a trailing end; (c) a bottom connecting the leading end to the trailing end; (d) a dampening chamfer; and (e) a top extending between the leading end and the trailing end, and being connected directly to the leading end or the trailing end on one side and an opposing end of the top is connected to the leading end or the trailing end by the dampening chamfer; wherein the dampening chamfer is configured so that when the pressure plate is installed in a brake system and a pin extends through each of the one or more pin holes, movement of the pressure plate during non-braking conditions is redirected by the dampening chamfer.

Abstract: A disc brake caliper for applying a braking force on a brake disc rotor configured to be rotatable about a rotational axis. The disc brake caliper comprises an attachment surface and a first threaded hole. The attachment surface is configured to face a pipe portion of a bicycle frame in a state where the disc brake caliper is coupled to the bicycle frame. A first thread bolt is to be inserted in the first threaded hole so as to couple the disc brake caliper to one of the bicycle frame and a base member attached to the bicycle frame, the first threaded hole being provided on the attachment surface.