WO2024116541A1 - Frein à disque - Google Patents

Frein à disque Download PDF

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Publication number
WO2024116541A1
WO2024116541A1 PCT/JP2023/033161 JP2023033161W WO2024116541A1 WO 2024116541 A1 WO2024116541 A1 WO 2024116541A1 JP 2023033161 W JP2023033161 W JP 2023033161W WO 2024116541 A1 WO2024116541 A1 WO 2024116541A1
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WO
WIPO (PCT)
Prior art keywords
pad
plate portion
disk
friction pad
spring
Prior art date
Application number
PCT/JP2023/033161
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English (en)
Japanese (ja)
Inventor
学聖 張
雄太 土屋
真一 木原
勝彦 平田
光 宿里
Original Assignee
日立Astemo株式会社
本田技研工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日立Astemo株式会社, 本田技研工業株式会社 filed Critical 日立Astemo株式会社
Publication of WO2024116541A1 publication Critical patent/WO2024116541A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
    • F16D65/092—Bands, shoes or pads; Pivots or supporting members therefor for axially-engaging brakes, e.g. disc brakes
    • F16D65/095—Pivots or supporting members therefor
    • F16D65/097—Resilient means interposed between pads and supporting members or other brake parts

Definitions

  • the present invention relates to a disc brake.
  • This application claims priority based on Japanese Patent Application No. 2022-191119, filed on November 30, 2022, the contents of which are incorporated herein by reference.
  • the present invention provides a disc brake that can suppress the generation of abnormal noise.
  • a disc brake includes a mounting member attached to a non-rotating portion of a vehicle and having a torque receiving portion in the disc rotation direction, a friction pad movable in the disc axial direction, a caliper supported by the mounting member and pressing the friction pad against the disc, and a pad spring attached to the mounting member and elastically supporting the friction pad.
  • the pad spring on the rotation side of the disc rotation direction has a first support portion that elastically supports the friction pad in the disc rotation direction, and a second support portion that is offset from the first support portion in the disc radial direction, covers the torque receiving portion, and elastically supports the friction pad in the disc rotation direction.
  • One of the first support portion and the second support portion abuts against the friction pad, and the other has a first state in which there is a gap between the friction pad and the other, and a second state in which the gap is filled by the movement of the friction pad.
  • a disc brake includes a mounting member attached to a non-rotating portion of a vehicle and having a torque receiving portion in the disc rotation direction, a friction pad movable in the disc axial direction, a caliper supported by the mounting member and pressing the friction pad against the disc, and a pad spring attached to the mounting member and elastically supporting the friction pad.
  • the pad spring on the rotation side of the disc rotation direction has a first support portion that elastically supports the friction pad in the disc rotation direction, and a second support portion that is offset from the first support portion in the disc radial direction, covers the torque receiving portion, and elastically supports the friction pad in the disc rotation direction.
  • the spring constant of the first support portion is smaller than the spring constant of the second support portion.
  • the present invention makes it possible to suppress the generation of abnormal noise.
  • FIG. 1 is a perspective view showing a disk brake according to an embodiment.
  • FIG. 2 is a perspective view showing the disk brake of the embodiment excluding components of the caliper other than the slide pin.
  • FIG. 2 is a view showing the disk brake of the embodiment excluding components of the caliper other than the slide pin, as viewed from the radially inner side of the disk.
  • FIG. 2 is a diagram showing the disk brake of the embodiment from the inner side, excluding components of the caliper other than the slide pin.
  • FIG. 2 is a diagram showing the disk brake of the embodiment excluding the caliper, as viewed from the outer side.
  • FIG. 4 is a partial view of the disk brake of the embodiment, seen from the outer side excluding the return spring and the rivet.
  • FIG. 2 is a perspective view showing a first pad spring of the disc brake according to the embodiment.
  • FIG. 2 is a side view showing a first pad spring of the disc brake according to the embodiment.
  • FIG. 2 is a partial side view showing a first pad spring of the disc brake according to the embodiment.
  • FIG. 4 is a side view showing a second pad spring of the disc brake according to the embodiment.
  • 1 is a diagram showing a first state of a disk brake according to an embodiment, as viewed from the outer side;
  • the disc brake 10 of the embodiment shown in FIG. 1 is for use in a vehicle such as an automobile, and applies a braking force to the vehicle. Specifically, the disc brake 10 is for use in braking a four-wheeled vehicle. The disc brake 10 brakes the vehicle by stopping the rotation of a circular disc 11 that rotates together with the wheel (not shown).
  • the disc brake 10 includes a mounting member 20, a caliper 21, a first pin boot 22, a second pin boot 23, a first pad spring 24 (pad spring), a second pad spring 25, a first friction pad 26, and a second friction pad 27.
  • the central axis of the disc 11 is referred to as the disc axis.
  • the direction in which the disc axis extends is referred to as the disc axial direction.
  • the radial direction of the disc 11 within the disc brake 10 is referred to as the disc radial direction.
  • the rotational direction of the disc 11 within the disc brake 10, i.e., the circumferential direction, is referred to as the disc rotational direction.
  • the center side of the disc 11 in the disc radial direction is referred to as the disc radial inner side.
  • the opposite side of the center of the disc 11 in the disc radial direction is referred to as the disc radial outer side.
  • the center side of the length in the disc rotational direction within the disc brake 10 is referred to as the disc rotation inner side.
  • the opposite side of the center of the length in the disc rotational direction within the disc brake 10 is referred to as the disc rotation outer side.
  • a line passing through the disc axis and the center of the mounting member 20 and the caliper 21 in the disc rotational direction along the disc radial direction is referred to as the radial reference line.
  • This radial reference line is perpendicular to the disc axis.
  • a plane including this radial reference line and the disc axis is referred to as the radial reference plane.
  • the outer side in the vehicle width direction of the vehicle on which this disc brake 10 is provided is referred to as the outer side.
  • the inner side in the vehicle width direction of the vehicle on which this disc brake 10 is provided is referred to as the inner side.
  • the inlet side of the rotation direction Fr of the disc 11 in the disc brake 10 when the vehicle on which this disc brake 10 is provided is traveling forward is referred to as the forward disc rotation direction inlet side (disc rotation direction inlet side).
  • the outlet side of the rotation direction Fr of the disc 11 in the disc brake 10 when the vehicle on which this disc brake 10 is provided is traveling forward is referred to as the forward disc rotation direction outlet side (disc rotation direction outlet side).
  • the forward disc rotation direction inlet side becomes the outlet side of the rotation direction of the disc 11 in the disc brake 10 when the vehicle on which this disc brake 10 is provided is traveling backward.
  • the outlet side of the rotation direction of the disc 11 in the disc brake 10 when the vehicle is traveling backward is referred to as the reverse disc rotation direction outlet side.
  • the outgoing side of the disk rotation direction when driving forward is the inlet side of the rotation direction of the disk 11 in the disk brake 10 when the vehicle equipped with this disk brake 10 is traveling in reverse.
  • the inlet side of the rotation direction of the disk 11 in the disk brake 10 when the vehicle is traveling in reverse is called the inlet side of the disk rotation direction when driving in reverse.
  • the mounting member 20 is provided on the vehicle, straddling the outer periphery of the disk 11. In this state, the mounting member 20 is attached to a non-rotating portion of the vehicle (not shown).
  • the mounting member 20 comprises an inner side arrangement portion 31, an outer side arrangement portion 32, and a pair of first and second connecting portions 33 and 34 that connect these.
  • the mounting member 20 has a shape that is approximately mirror symmetrical with respect to a radial reference plane.
  • the disk 11 has a first braking surface 11a on one side in the disk axial direction and a second braking surface 11b on the other side in the disk axial direction.
  • the first braking surface 11a is disposed on the inner side of the disk 11.
  • the second braking surface 11b is disposed on the outer side of the disk 11.
  • the inner side portion 31 is disposed on one side of the disk 11 in the disk axial direction and is attached to a non-rotating portion of the vehicle.
  • the non-rotating portion of the vehicle to which the mounting member 20 is attached is disposed on the inner side of the disk 11. Therefore, the inner side portion 31 attached to this non-rotating portion is also disposed on the inner side of the disk 11.
  • the inner side portion 31 faces the first braking surface 11a of the disk 11.
  • the inner side portion 31 supports the first friction pad 26 shown in FIG. 2 so that it can move in the disk axial direction. In other words, the first friction pad 26 is movable in the disk axial direction.
  • the first friction pad 26 is disposed on the inner side of the disk 11.
  • the first friction pad 26 is disposed facing the first braking surface 11a of the disk 11.
  • the outer side portion 32 is disposed on the other side of the disk 11 in the disk axial direction.
  • the outer side portion 32 is disposed on the outer side of the disk 11.
  • the outer side portion 32 faces the second braking surface 11b of the disk 11.
  • the outer side portion 32 supports the second friction pad 27 so that it can move in the disk axial direction. In other words, the second friction pad 27 is movable in the disk axial direction.
  • the second friction pad 27 is disposed on the outer side of the disk 11.
  • the second friction pad 27 is disposed so as to face the second braking surface 11b of the disk 11.
  • the first connecting portion 33 and the second connecting portion 34 extend in the disk axial direction and are provided across the outer periphery of the disk 11 in the disk axial direction.
  • the first connecting portion 33 connects the ends of the inner side arrangement portion 31 and the outer side arrangement portion 32 on the radially outer side of the disk and on the inlet side of the disk rotation direction when moving forward.
  • the second connecting portion 34 connects the ends of the inner side arrangement portion 31 and the outer side arrangement portion 32 on the radially outer side of the disk and on the outlet side of the disk rotation direction when moving forward.
  • the inner side arrangement portion 31 includes a first fixing portion 42 having a screw hole 41, a second fixing portion 44 having a screw hole 43, and a main beam 45 connecting the first fixing portion 42 and the second fixing portion 44.
  • the inner side arrangement portion 31 also includes a first connecting portion 46 extending from the first fixing portion 42 and a second connecting portion 47 extending from the second fixing portion 44.
  • the first fixing portion 42, the second fixing portion 44, the main beam 45, the first connecting portion 46, and the second connecting portion 47 are all arranged on the inner side of the disc 11, and all face the first braking surface 11a of the disc 11.
  • the first fixing portion 42 is provided on the inner side arrangement portion 31 on the side of the second fixing portion 44 in the forward disc rotation direction.
  • the main beam 45 extends in the disc rotation direction.
  • the screw hole 41 is drilled in the first fixing portion 42 along the disc axial direction.
  • the screw hole 43 is drilled in the second fixing portion 44 along the disc axial direction.
  • the mounting member 20 is attached to the mounting portion (not shown) by a bolt (not shown) screwed into the screw holes 41, 43 with the first fixing portion 42 and the second fixing portion 44 abutting against the mounting portion (not shown) which is a non-rotating portion of the vehicle.
  • the first fixing portion 42 and the second fixing portion 44 fixed to the non-rotating portion of the vehicle are aligned with each other in the disc axial direction and the disc radial direction. In this state, the main beam 45 overlaps the first fixing portion 42 and the second fixing portion 44 in the disc axial direction.
  • the first connection part 46 overlaps with the first fixing part 42 in the disk axial direction and extends outward in the disk radial direction from the first fixing part 42.
  • the second connection part 47 overlaps with the second fixing part 44 in the disk axial direction and extends outward in the disk radial direction from the second fixing part 44.
  • the first connection part 46 is positioned closer to the inlet side of the disk rotation direction when moving forward than the second connection part 47.
  • the first connecting portion 33 extends from the radially outer end of the first connecting portion 46 along the disk axis toward the outer side, straddling a position radially outer than the outer peripheral surface of the disk 11.
  • the second connecting portion 34 extends from the radially outer end of the second connecting portion 47 along the disk axis toward the outer side, straddling a position radially outer than the outer peripheral surface of the disk 11.
  • the outer side arrangement portion 32 includes a third connection portion 51 extending from the first connection portion 33, a fourth connection portion 52 extending from the second connection portion 34, and an outer beam 53 connecting the third connection portion 51 and the fourth connection portion 52.
  • the third connection portion 51, the fourth connection portion 52, and the outer beam 53 are all arranged on the outer side of the disk 11, and all face the second braking surface 11b of the disk 11.
  • the third connection part 51 extends radially inward from the outer end of the first connection part 33 in the disk axial direction.
  • the fourth connection part 52 extends radially inward from the outer end of the second connection part 34 in the disk axial direction.
  • the third connection part 51 is positioned on the forward disk rotation inlet side than the fourth connection part 52.
  • the outer beam 53 connects the radially inner end of the third connection part 51 to the radially inner end of the fourth connection part 52.
  • the outer beam 53 extends in the disk rotation direction.
  • the first connection portion 46 and the second connection portion 47 shown in FIG. 4 and the third connection portion 51 and the fourth connection portion 52 shown in FIG. 5 each have a torque receiving portion 60 of a similar shape formed on the inner side in the disk rotation direction.
  • the torque receiving portion 60 of the first connection portion 46 and the torque receiving portion 60 of the second connection portion 47 shown in FIG. 4 are arranged in mirror symmetry in the disk rotation direction.
  • the torque receiving portion 60 of the third connection portion 51 and the torque receiving portion 60 of the fourth connection portion 52 shown in FIG. 5 are arranged in mirror symmetry in the disk rotation direction.
  • the mounting member 20 has torque receiving portions 60 on both sides in the disk rotation direction.
  • the four torque receiving portions 60 of the same shape will be explained using the torque receiving portion 60 of the third connection portion 51 shown in FIG. 6 as an example.
  • the torque receiving portion 60 has, in order from the radially inner side of the disk, a first surface portion 61, a second surface portion 62, a third surface portion 63 (torque receiving surface), a fourth surface portion 64, a fifth surface portion 65, a sixth surface portion 66, and a seventh surface portion 67.
  • the first surface portion 61, the second surface portion 62, the third surface portion 63, the fourth surface portion 64, the fifth surface portion 65, the sixth surface portion 66, and the seventh surface portion 67 all extend along the disk axial direction.
  • the first surface portion 61 has a curved surface and extends along the radial direction of the disk.
  • the second surface portion 62 is flat and extends outward in the disk rotation direction from the outer side in the disk radial direction of the first surface portion 61.
  • the second surface portion 62 extends approximately perpendicular to a radial reference line.
  • the third surface 63 is flat and extends outward in the radial direction of the disk from the outer side in the disk rotation direction of the second surface 62.
  • the third surface 63 extends parallel to a radial reference plane.
  • the fourth surface portion 64 is flat and extends inward in the disk rotation direction from the outer side in the disk radial direction of the third surface portion 63.
  • the fourth surface portion 64 extends perpendicular to a radial reference line.
  • the fifth surface 65 is flat and extends outward in the radial direction of the disk from the inner side in the disk rotation direction of the fourth surface 64.
  • the fifth surface 65 extends parallel to a radial reference plane.
  • the sixth surface 66 is flat and extends outward in the disk rotation direction from the outer side in the disk radial direction of the fifth surface 65.
  • the sixth surface 66 extends perpendicular to a radial reference line.
  • the seventh surface portion 67 is flat and extends outward in the radial direction of the disk from the outer side in the radial direction of the disk of the sixth surface portion 66.
  • the seventh surface portion 67 extends in parallel to the radial reference plane.
  • the first surface 61, the third surface 63, the fifth surface 65, and the seventh surface 67 face inward in the direction of disk rotation.
  • the second surface 62 and the sixth surface 66 face outward in the radial direction of the disk.
  • the fourth surface 64 faces inward in the radial direction of the disk.
  • the continuous second surface 62, third surface 63, and fourth surface 64 form an engagement recess 75 that is recessed further outward in the disk rotation direction than the first surface 61 and fifth surface 65.
  • the torque receiving portion 60 is a torque receiving surface where the third surface 63 of the engagement recess 75 receives the braking torque of the second friction pad 27.
  • the torque receiving portion 60 of the fourth connection portion 52 has an engagement recess 75 that is mirror-symmetrical to the torque receiving portion 60 of the third connection portion 51.
  • the engagement recess 75 of the third connection portion 51 and the engagement recess 75 of the fourth connection portion 52 face each other in the disk rotation direction and are recessed in directions that move away from each other in the disk rotation direction.
  • the engagement recess 75 of the third connection portion 51 and the engagement recess 75 of the fourth connection portion 52 are aligned in the disk axial direction and are also aligned in the disk radial direction.
  • the engagement recess 75 of the third connection portion 51 penetrates the third connection portion 51 in the disk axial direction.
  • the engagement recess 75 of the fourth connection portion 52 penetrates the fourth connection portion 52 in the disk axial direction.
  • the torque receiving portion 60 of the first connection portion 46 has an engagement recess 75 similar to the torque receiving portion 60 of the third connection portion 51 shown in FIG. 5.
  • the torque receiving portion 60 of the second connection portion 47 has an engagement recess 75 that is mirror-symmetrical to the torque receiving portion 60 of the first connection portion 46.
  • the engagement recess 75 of the first connection portion 46 and the engagement recess 75 of the second connection portion 47 face each other in the disk rotation direction and are recessed in a direction away from each other in the disk rotation direction.
  • the engagement recess 75 of the first connection portion 46 and the engagement recess 75 of the second connection portion 47 are aligned in the disk axial direction and are also aligned in the disk radial direction.
  • the engagement recess 75 of the first connection portion 46 penetrates the first connection portion 46 in the disk axial direction.
  • the engagement recess 75 of the second connection portion 47 penetrates the second connection portion 47 in the disk axial direction.
  • the engagement recess 75 of the third connection part 51 shown in FIG. 5 and the engagement recess 75 of the first connection part 46 shown in FIG. 4 are aligned in the radial direction of the disk and are also aligned in the direction of disk rotation.
  • the engagement recess 75 of the second connection part 47 shown in FIG. 4 and the engagement recess 75 of the fourth connection part 52 shown in FIG. 5 are aligned in the radial direction of the disk and are also aligned in the direction of disk rotation.
  • the inner side arrangement portion 31 of the mounting member 20 supports the first friction pad 26 with the engagement recess 75 provided in the first connection portion 46 and the engagement recess 75 provided in the second connection portion 47.
  • the outer side arrangement portion 32 of the mounting member 20 supports the second friction pad 27 with the engagement recess 75 provided in the third connection portion 51 and the engagement recess 75 provided in the fourth connection portion 52.
  • the first fixing portion 42 and the first connection portion 46 shown in FIG. 4 and the first connecting portion 33 and the third connecting portion 51 shown in FIG. 5 are arranged on the forward disk rotation direction rotation-in side of the mounting member 20.
  • the second fixing portion 44 and the second connecting portion 47 shown in FIG. 4 and the second connecting portion 34 and the fourth connecting portion 52 shown in FIG. 5 are arranged on the forward disk rotation direction rotation-out side of the mounting member 20.
  • the first pad spring 24 and the second pad spring 25 are both integrally provided on the mounting member 20. As shown in FIG. 2, the first pad spring 24 is attached to the forward disc rotation direction inlet side of the mounting member 20. At this time, one first pad spring 24 is attached across both the first connection part 46 and the third connection part 51 on the forward disc rotation direction inlet side.
  • the second pad spring 25 is attached to the forward disc rotation direction outlet side of the mounting member 20. At this time, one second pad spring 25 is attached across both the second connection part 47 and the fourth connection part 52 on the forward disc rotation direction outlet side. In other words, two first pad springs 24 and two second pad springs 25 are attached to one mounting member 20.
  • first pad springs 24 and second pad springs 25 are attached to the mounting member 20 and elastically support the first friction pad 26 and the second friction pad 27.
  • first pad spring 24 and the second pad spring 25 guide the movement of the first friction pad 26 and the second friction pad 27 in the disk axial direction.
  • FIGS 7 and 8 show the first pad spring 24 in its natural state before it is attached to the mounting member 20.
  • the first pad spring 24 has a mirror-symmetric shape.
  • the first pad spring 24 is formed by press molding from a single metal plate of a constant thickness.
  • the first pad spring 24 has a pair of pad support parts 101, a connecting part 102 connecting the pad support parts 101, and an engaging part 103 extending from the connecting part 102.
  • the pair of pad support parts 101 of the first pad spring 24 are arranged on both sides of the disk 11 in the disk axial direction.
  • the connecting part 102 of the first pad spring 24 is arranged outside the disk 11 in the disk radial direction. In other words, the disk 11 is arranged between the pair of pad support parts 101 of the first pad spring 24.
  • the pair of pad support parts 101 have a mirror symmetrical shape. Therefore, only one of the pad support parts 101 will be described.
  • the pad support portion 101 has an outer end plate portion 110, an outer plate portion 111, an outer support plate portion 112, a wall plate portion 113 (elastic plate portion), an extension plate portion 114, an inner plate portion 115, and an engagement claw 116.
  • the outer end plate portion 110, the outer plate portion 111, the outer support plate portion 112, the extension plate portion 114, the inner plate portion 115, and the engagement claw 116 are all flat.
  • the outer end plate portion 110 is located at the end of the pad support portion 101 on the connecting portion 102 side.
  • the outer plate portion 111 extends from the side of the outer end plate portion 110 opposite the connecting portion 102 toward the side opposite the connecting portion 102 , approximately perpendicular to the outer end plate portion 110 .
  • the outer support plate portion 112 extends approximately perpendicularly to the outer plate portion 111 from the side of the outer plate portion 111 opposite the outer end plate portion 110.
  • the outer support plate portion 112 extends from the outer plate portion 111 to the same side as the outer end plate portion 110 in the thickness direction of the outer plate portion 111.
  • the wall plate portion 113 extends from the opposite side of the outer support plate portion 112 to the outer plate portion 111, approximately perpendicular to the outer support plate portion 112.
  • the wall plate portion 113 extends from the outer support plate portion 112 to the opposite side to the outer plate portion 111 in the thickness direction of the outer support plate portion 112.
  • the wall plate portion 113 is a curved plate that curves in the thickness direction.
  • the wall plate portion 113 is curved so as to be convex toward the side where the outer support plate portion 112 extends from the wall plate portion 113 in the thickness direction of the wall plate portion 113. That is, as shown in FIG. 9, the wall plate portion 113 has a curved surface portion 117 that curves with a radius R greater than 0 on the outer support plate portion 112 side in the thickness direction of the wall plate portion 113.
  • the wall plate portion 113 also has a curved surface portion 118 that curves with a radius greater than 0 on the side opposite the outer support plate portion 112 in the thickness direction of the wall plate portion 113.
  • the extension plate portion 114 extends approximately perpendicularly to the wall plate portion 113 from the side of the wall plate portion 113 opposite the outer support plate portion 112.
  • the extension plate portion 114 extends from the wall plate portion 113 to the same side as the outer support plate portion 112 in the thickness direction of the wall plate portion 113.
  • an intermediate opening 119 is formed in the extension plate portion 114.
  • the intermediate opening 119 penetrates a predetermined range on the wall plate portion 113 side of the extension plate portion 114 in the thickness direction of the extension plate portion 114.
  • the inner plate portion 115 extends from the side of the extension plate portion 114 opposite the wall plate portion 113, approximately perpendicular to the extension plate portion 114.
  • the inner plate portion 115 extends from the extension plate portion 114 to the side opposite the wall plate portion 113 in the thickness direction of the extension plate portion 114.
  • the engaging claw 116 protrudes from the wall plate portion 113 through the intermediate opening 119 to the side opposite the extending plate portion 114 from the outer support plate portion 112.
  • the engaging claw 116 protrudes from the wall plate portion 113 at an obtuse angle to the wall plate portion 113.
  • the engaging claw 116 protrudes on the same side as the extending plate portion 114 in the thickness direction of the wall plate portion 113.
  • the boundary between the outer end plate portion 110 and the outer plate portion 111, the boundary between the outer plate portion 111 and the outer support plate portion 112, the boundary between the outer support plate portion 112 and the wall plate portion 113, the boundary between the wall plate portion 113 and the extending plate portion 114, and the boundary between the extending plate portion 114 and the inner plate portion 115 are all parallel.
  • the wall plate portion 113 is curved about an axis parallel to these boundary lines.
  • the outer plate portion 111 and the wall plate portion 113 extend so as to be approximately parallel to each other. As shown in FIG. 8, the extending plate portion 114 extends at a slight incline relative to the outer support plate portion 112 so that the further it is from the wall plate portion 113, the further it is from the outer support plate portion 112.
  • the outer end plate portion 110, the outer support plate portion 112, and the extension plate portion 114 extend approximately parallel to each other.
  • the outer plate portion 111, the wall plate portion 113, and the inner plate portion 115 extend approximately parallel to each other.
  • the continuous outer support plate portion 112, wall plate portion 113, and extension plate portion 114 are connected as a whole to form a concave shape relative to the outer plate portion 111 and the inner plate portion 115, forming a guide recess 120 (second support portion).
  • the pad support portion 101 has a spring plate portion 121 (third support portion).
  • the spring plate portion 121 extends from the edge of the extension plate portion 114 of this pad support portion 101 on the opposite side to the other pad support portion 101, and then folds back toward the outer support plate portion 112 in the thickness direction of the extension plate portion 114, and extends toward the other pad support portion 101.
  • the spring plate portion 121 has a curved plate portion 122 and an inner support plate portion 123.
  • the curved plate portion 122 is curved in an approximately cylindrical shape. In one pad support portion 101, the curved plate portion 122 extends from the edge portion of the extension plate portion 114 on the opposite side to the other pad support portion 101. In one pad support portion 101, the curved plate portion 122 extends from the extension plate portion 114 in a direction approaching the outer support plate portion 112 in the thickness direction of the extension plate portion 114 and away from the other pad support portion 101. Then, the curved plate portion 122 extends in a direction approaching the outer support plate portion 112 in the thickness direction of the extension plate portion 114 and away from the other pad support portion 101. Then, the curved plate portion 122 extends in a direction approaching the other pad support portion 101 while moving away from the outer support plate portion 112 in the thickness direction of the extension plate portion 114.
  • the inner support plate portion 123 extends linearly from the edge portion opposite the edge portion of the curved plate portion 122 that is continuous with the extending plate portion 114 toward the other pad support portion 101. In one pad support portion 101, the inner support plate portion 123 extends from the curved plate portion 122 so as to move away from the extending plate portion 114 in the thickness direction of the extending plate portion 114 as it approaches the other pad support portion 101.
  • the spring plate portion 121 elastically deforms mainly at the curved plate portion 122.
  • the pad support portion 101 has a spring plate portion 131 (first support portion).
  • the spring plate portion 131 extends from the edge of the outer plate portion 111 of the pad support portion 101 opposite the other pad support portion 101 to the opposite side to the other pad support portion 101, and then folds back in the thickness direction of the outer plate portion 111 to the opposite side to the wall plate portion 113, and extends toward the other pad support portion 101.
  • the spring plate portion 131 has a curved plate portion 132 and a support plate portion 133.
  • the curved plate portion 132 is curved in an approximately cylindrical shape. In one pad support portion 101, the curved plate portion 132 extends from the edge portion of the outer plate portion 111 on the opposite side to the other pad support portion 101. In one pad support portion 101, the curved plate portion 132 extends from the outer plate portion 111 in a direction away from the other pad support portion 101 while extending to the same side as the outer support plate portion 112 in the thickness direction of the outer plate portion 111. Then, the curved plate portion 132 extends in a direction away from the other pad support portion 101 while extending in the opposite direction to the outer support plate portion 112 in the thickness direction of the outer plate portion 111. Then, the curved plate portion 132 extends in a direction toward the other pad support portion 101 while extending in the opposite direction to the outer support plate portion 112 in the thickness direction of the outer plate portion 111.
  • the support plate portion 133 extends from the edge of the curved plate portion 132 opposite the edge portion that is continuous with the outer plate portion 111 toward the other pad support portion 101. In one pad support portion 101, the support plate portion 133 extends from the curved plate portion 132 so as to move away from the outer plate portion 111 in the thickness direction of the outer plate portion 111 as it approaches the other pad support portion 101. In one pad support portion 101, the support plate portion 133 is curved in an arc shape centered on an axis that is on the opposite side of the outer plate portion 111 in the thickness direction of the support plate portion 133 from the outer plate portion 111, and that extends perpendicular to the outer support plate portion 112.
  • the first pad spring 24 has a pair of the above pad support parts 101 arranged in mirror symmetry.
  • the connecting portion 102 has a base end connecting plate portion 141, an intermediate connecting plate portion 142, and a tip end plate portion 143.
  • the base end connecting plate portion 141, the intermediate connecting plate portion 142, and the tip end plate portion 143 are all flat plate-shaped.
  • the base end connecting plate portion 141 is disposed on the same plane as the outer end plate portions 110 of the pair of pad support portions 101 and connects them.
  • the base end connecting plate portion 141 connects the end edges of the pair of outer end plate portions 110 opposite the outer plate portions 111.
  • the intermediate connecting plate portion 142 extends from the edge of the base end connecting plate portion 141 opposite the pair of outer end plate portions 110 to the opposite side of the pair of outer plate portions 111 in the thickness direction of the base end connecting plate portion 141.
  • the tip plate portion 143 extends from the edge of the intermediate connecting plate portion 142 on the opposite side to the base end connecting plate portion 141 in the thickness direction of the intermediate connecting plate portion 142.
  • the tip plate portion 143 extends farther away from the base end connecting plate portion 141 in the thickness direction of the base end connecting plate portion 141 as it moves away from the intermediate connecting plate portion 142.
  • the engaging portion 103 has a base portion 145 and a pair of engaging protrusions 146 .
  • the base plate portion 135 extends from a position between the pair of outer end plates 110 of the base end connecting plate portion 141 in a direction away from the base end connecting plate portion 141 in the thickness direction of the intermediate connecting plate portion 142, and then is folded back to the opposite side to the intermediate connecting plate portion 142 in the thickness direction of the base end connecting plate portion 141.
  • the base plate portion 135 then extends away from the pair of outer plate portions 111 in the thickness direction of the intermediate connecting plate portion 142, and away from the intermediate connecting plate portion 142 in the thickness direction of the base end connecting plate portion 141.
  • the pair of engaging protrusions 146 are provided on the end of the base plate portion 145 opposite the base end connecting plate portion 141.
  • One engaging protrusion 146 protrudes from the edge of the base plate portion 145 on one outer end plate portion 110 side, and the other engaging protrusion 146 protrudes from the edge of the base plate portion 145 on the other outer end plate portion 110 side.
  • the pair of engaging protrusions 146 protrude on the side opposite the base end connecting plate portion 141 in the thickness direction of the base plate portion 145. The distance between the pair of engaging protrusions 146 becomes wider the further away they are from the base plate portion 145.
  • the boundary line between the base end connecting plate portion 141 and the intermediate connecting plate portion 142, the boundary line between the intermediate connecting plate portion 142 and the tip plate portion 143, and the boundary line between the base end connecting plate portion 141 and the base plate portion 145 are parallel to the boundary line between the outer end plate portion 110 and the outer side plate portion 111.
  • FIG. 10 shows the second pad spring 25 in its natural state before it is attached to the mounting member 20.
  • the second pad spring 25 differs in some respects from the first pad spring 24 shown in FIGS. 7 and 8.
  • the second pad spring 25 has a mirror-symmetrical shape.
  • the second pad spring 25 is formed by pressing a single metal plate of a constant thickness.
  • the second pad spring 25 has a pair of pad supports 101A that are partially different from the pair of pad supports 101, instead of the pair of pad supports 101.
  • the second pad spring 25 does not have either of the pair of spring plate portions 131 shown in FIG. 7.
  • the pad support portion 101A has a guide recess 120A that is partially different from the guide recess 120 in place of the guide recess 120.
  • the guide recess 120A has a wall plate portion 113A that is different from the wall plate portion 113 in place of the wall plate portion 113.
  • the wall plate portion 113A is a flat plate extending approximately perpendicularly to the outer support plate portion 112 and the extension plate portion 114. That is, the wall plate portion 113A has a flat plane portion 117A on the outer support plate portion 112 side in the thickness direction of the wall plate portion 113A.
  • the wall plate portion 113A also has a flat plane portion 118A on the opposite side to the outer support plate portion 112 in the thickness direction of the wall plate portion 113A.
  • the second pad spring 25 has the same configuration as the first pad spring 24 shown in Figures 7 and 8.
  • the first pad spring 24 is attached to the first connection portion 46 and the third connection portion 51 of the mounting member 20, both of which are on the forward rotation side of the disk rotation direction. At this time, the first pad spring 24 is in a state in which the connecting portion 102 is positioned radially outward of the pad support portion 101. At this time, the first pad spring 24 has the guide recess 120 of one pad support portion 101 fitted into the engagement recess 75 of the third connection portion 51 as shown in FIG. 5, and the guide recess 120 of the other pad support portion 101 fitted into the engagement recess 75 of the first connection portion 46 as shown in FIG. 4.
  • the first pad spring 24 is provided on the mounting member 20 such that movement in the disk radial direction and toward the forward rotation side of the disk rotation direction is restricted.
  • the first pad spring 24 abuts one of the engagement protrusions 146 of the engagement portion 103 against the surface of the first connection portion 46 on the third connection portion 51 side, and the other engagement protrusion 146 against the surface of the third connection portion 51 on the first connection portion 46 side. This restricts the movement of the first pad spring 24 in the disk axial direction on the mounting member 20.
  • the first pad spring 24 is positioned and attached to the mounting member 20 in the disk radial direction, disk rotation direction, and disk axial direction.
  • the first pad spring 24 is in a state in which the pair of pad support portions 101 are arranged on both sides of the disk 11 in the disk axial direction, as shown in Figure 2.
  • the first pad spring 24 is in a state in which the guide recess 120 and spring plate portion 121 of one pad support portion 101 shown in Figure 4 are arranged in the engagement recess 75 of the first connection portion 46 of the mounting member 20, and the guide recess 120 and spring plate portion 121 of the other pad support portion 101 shown in Figure 5 are arranged in the engagement recess 75 of the third connection portion 51 of the mounting member 20.
  • the pair of guide recesses 120 that fit into the pair of engagement recesses 75 are recessed outward in the direction of disk rotation when the first pad spring 24 is attached to the first connection part 46 and the third connection part 51.
  • the outer pad support portion 101 shown in FIG. 5 is engaged with the torque receiving portion 60 of the third connection portion 51
  • the inner pad support portion 101 shown in FIG. 4 is engaged with the torque receiving portion 60 of the first connection portion 46.
  • the first pad spring 24 has the same engagement state between the outer pad support portion 101 and the torque receiving portion 60 of the third connection portion 51 shown in FIG. 5 and the same engagement state between the inner pad support portion 101 and the torque receiving portion 60 of the first connection portion 46 shown in FIG. 4. For this reason, the engagement state between the outer pad support portion 101 of the first pad spring 24 and the third connection portion 51 will be described here mainly based on FIG. 6.
  • the pad support portion 101 on the outer side of the first pad spring 24 is arranged so that the wall plate portion 113 of the guide recess 120 is located outside the guide recess 120 in the disk rotation direction.
  • the wall plate portion 113 of the guide recess 120 faces the third surface portion 63 on the rear side of the recess direction of the engagement recess 75 and abuts against this third surface portion 63.
  • the wall plate portion 113 spreads approximately parallel to the radial reference plane, similar to the third surface portion 63.
  • the wall plate portion 113 is curved as described above, and the outer end portion in the disk radial direction abuts against the third surface portion 63, and the middle portion in the disk radial direction moves away from the third surface portion 63 in the disk rotation direction.
  • the inner end portion in the disk radial direction of the wall plate portion 113 has a slight gap between the third surface portion 63 and the wall plate portion 113, which is smaller than the middle portion in the disk radial direction.
  • the pad support portion 101 on the outer side of the first pad spring 24 has the outer support plate portion 112 of the guide recess 120 positioned radially outward of the guide recess 120.
  • the outer support plate portion 112 of the guide recess 120 faces the fourth surface portion 64 on the radially outer side of the engagement recess 75, and comes into face contact with this fourth surface portion 64.
  • the outer support plate portion 112 like the fourth surface portion 64, extends along the disk axis and perpendicular to the radial reference line.
  • the pad support portion 101 on the outer side of the first pad spring 24 has the extension plate portion 114 of the guide recess 120 positioned on the radially inner side of the guide recess 120 in the disk radial direction.
  • the extension plate portion 114 of the guide recess 120 faces the second surface portion 62 on the radially inner side of the engagement recess 75 and comes into face contact with this second surface portion 62.
  • the extension plate portion 114 like the second surface portion 62, extends along the disk axial direction and approximately perpendicular to the radial reference line.
  • the pad support portion 101 on the outer side of the first pad spring 24 has an engagement claw 116 shown in FIG. 7 disposed on the inner side in the radial direction of the disk in the guide recess 120.
  • the engagement claw 116 abuts against the second surface portion 62 of the engagement recess 75 shown in FIG. 6 and elastically deforms outward in the radial direction of the disk.
  • the pad support portion 101 on the outer side of the first pad spring 24 has an inner plate portion 115 that extends radially inward from the extension plate portion 114 and faces the first surface portion 61 in the direction of disk rotation.
  • the pad support portion 101 on the outer side of the first pad spring 24 has an outer plate portion 111 that extends radially outward from the outer support plate portion 112 and faces the fifth surface portion 65 in the direction of disk rotation.
  • the guide recess 120 of the pad support portion 101 on the outer side of the first pad spring 24 fits into the engagement recess 75. At that time, the pad support portion 101 abuts against the engagement recess 75 at the outer support plate portion 112, the wall plate portion 113, the extension plate portion 114, and the engagement claw 116.
  • the pad support portion 101 on the outer side of the first pad spring 24 has an outer support plate portion 112 that extends from the radially outer edge of the wall plate portion 113, and an extension plate portion 114 that extends from the radially inner edge of the wall plate portion 113, both of which extend inward in the direction of disk rotation.
  • the outer support plate portion 112, wall plate portion 113, and extension plate portion 114 all extend along the disk axis.
  • the outer pad support portion 101 of the first pad spring 24 has a curved plate portion 122 of the spring plate portion 121 provided on the opposite side of the extending plate portion 114 from the disk 11 in the disk axial direction.
  • the curved plate portion 122 extends from the extending plate portion 114 to the opposite side of the disk 11, and then bends back outward in the disk radial direction.
  • the inner support plate portion 123 of the spring plate portion 121 shown in FIG. 7 extends from the curved plate portion 122 in the disk axial direction so as to approach the disk 11.
  • the outer pad support portion 101 of the first pad spring 24 has a curved plate portion 132 of the spring plate portion 131 provided on the opposite side of the outer plate portion 111 from the disk 11 in the disk axial direction.
  • the curved plate portion 132 extends from the outer plate portion 111 to the opposite side of the disk 11, and then bends back inward in the disk rotation direction.
  • the support plate portion 133 of the spring plate portion 131 shown in FIG. 7 extends from the curved plate portion 132 in the disk axial direction so as to approach the disk 11.
  • the wall plate portion 113 of the pad support portion 101 on the outer side of the first pad spring 24 covers the third surface portion 63 of the torque receiving portion 60 of the third connection portion 51 .
  • the pad support portion 101 on the outer side of the first pad spring 24 has a wall plate portion 113 offset in the disk radial direction from the spring plate portion 131, specifically, offset inwardly in the disk radial direction from the spring plate portion 131.
  • the intermediate connecting plate portion 142 and the tip plate portion 143 of the connecting portion 102 extend radially outward from the edge portion of the base end connecting plate portion 141 opposite the pair of outer end plate portions 110 shown in FIG. 7.
  • the intermediate connecting plate portion 142 faces the seventh surface portion 67 in the disk rotation direction as shown in FIG. 6.
  • the second pad spring 25 is attached to the second connection portion 47 and the fourth connection portion 52 of the mounting member 20, both of which are on the forward rotation side of the disk rotation direction, in substantially the same manner as the first pad spring 24 is attached to the first connection portion 46 and the third connection portion 51.
  • the outer pad support portion 101A shown in FIG. 5 engages with the torque receiving portion 60 of the fourth connection portion 52. Also, when the second pad spring 25 is attached to the mounting member 20, the inner pad support portion 101A shown in FIG. 4 engages with the torque receiving portion 60 of the second connection portion 47.
  • the flat wall portion 113A on the outer side of the second pad spring 25 abuts in surface contact with the third surface portion 63 of the fourth connection portion 52, and as shown in FIG. 4, the flat wall portion 113A on the inner side abuts in surface contact with the third surface portion 63 of the second connection portion 47.
  • first pad spring 24 and the second pad spring 25 are attached to the mounting member 20 facing each other in the disk rotation direction while being spaced apart in the disk rotation direction.
  • the first friction pad 26 shown in FIG. 4 and the second friction pad 27 shown in FIG. 5 are engaged with the first pad spring 24 and the second pad spring 25 attached to the mounting member 20.
  • the first friction pad 26 is supported by the first connection portion 46 and the second connection portion 47 of the mounting member 20 via the first pad spring 24 and the second pad spring 25.
  • the second friction pad 27 is supported by the third connection portion 51 and the fourth connection portion 52 of the mounting member 20 via the first pad spring 24 and the second pad spring 25.
  • the first friction pad 26 and the second friction pad 27 both have their longitudinal directions aligned with the disk rotation direction.
  • the first inner friction pad 26 shown in FIG. 4 and the second outer friction pad 27 shown in FIG. 5 are parts of approximately the same shape.
  • the first friction pad 26 has a back plate 171.
  • the second friction pad 27 has a back plate 172.
  • the first friction pad 26 and the second friction pad 27 each have a lining 173 of a common shape.
  • the lining 173 is attached to one side of the back plates 171 and 172 in the thickness direction.
  • the first friction pad 26 has a longitudinal direction that is the longitudinal direction of the back plate 171.
  • the second friction pad 27 has a longitudinal direction that is the longitudinal direction of the back plate 172.
  • the first friction pad 26 has a back plate 171 supported by the mounting member 20 via the first pad spring 24 and the second pad spring 25 with the lining 173 facing the disk 11.
  • the second friction pad 27 has a back plate 172 supported by the mounting member 20 via the first pad spring 24 and the second pad spring 25 with the lining 173 facing the disk 11.
  • the back plate 171 of the first friction pad 26 has a mirror symmetrical shape.
  • the back plate 171 has a main body portion 175 and a pair of protruding portions 176 .
  • the main body portion 175 is provided at the center in the longitudinal direction of the back plate 171.
  • the main body portion 175 is long in the longitudinal direction of the back plate 171.
  • a lining 173 is attached to the main body portion 175.
  • the lining 173 also has a mirror symmetric shape.
  • the main body 175 has a pair of mounting holes 181 formed on both longitudinal sides thereof, penetrating the main body 175 in the thickness direction.
  • the pair of mounting holes 181 are formed in positions of the main body 175 where the lining 173 is not attached.
  • a wear sensor 183 is attached by a rivet 182 to a predetermined one of the pair of mounting holes 181.
  • the wear sensor 183 is attached to the surface of the main body 175 opposite the lining 173 in the thickness direction, and extends through the outside of the main body 175 toward the lining 173 from the surface of the main body 175 on the lining 173 side in the thickness direction.
  • the main body 175 has a pair of end faces 184 at both longitudinal ends. The pair of end faces 184 are parallel to each other.
  • the pair of protrusions 176 of the back plate 171 also have a mirror-symmetrical shape.
  • One protrusion 176 is provided at one end of the back plate 171 in the longitudinal direction.
  • the other protrusion 176 is provided at the other end of the back plate 171 in the longitudinal direction.
  • One of the pair of protrusions 176 protrudes outward along the longitudinal direction of the main body part 175 from an end face 184 at one longitudinal end of the main body part 175, and the other of the pair of protrusions 176 protrudes outward along the longitudinal direction of the main body part 175 from an end face 184 at the other longitudinal end of the main body part 175.
  • the pair of protrusions 176 protrude in opposite directions from both longitudinal ends of the main body part 175 along the longitudinal direction of the main body part 175.
  • the back plate 172 has a pair of protrusions 176 similar to the back plate 171 .
  • the protrusion 176 on the forward disc rotation direction inlet side of the first friction pad 26 shown in FIG. 4 has the same shape as the protrusion 176 on the forward disc rotation direction outlet side of the second friction pad 27 shown in FIG. 5, and the protrusion 176 on the forward disc rotation direction outlet side of the first friction pad 26 shown in FIG. 4 has the same shape as the protrusion 176 on the forward disc rotation direction inlet side of the second friction pad 27 shown in FIG. 5.
  • the protrusion 176 on the forward disc rotation direction inlet side of the second friction pad 27 will be mainly referred to in FIG. 6 and will be described as an example.
  • the protrusion 176 on the side of the second friction pad 27 facing the forward rotation direction of the disc has an inner surface 191, an outer surface 192, and a tip surface 193.
  • the inner surface 191, the outer surface 192, and the tip surface 193 are all flat and extend along the thickness direction of the back plate 171.
  • the inner surface portion 191 and the outer surface portion 192 both extend from the main body portion 185 along the longitudinal direction of the back plate 171.
  • the outer surface portion 192 extends from one end side of the end face 184 of the main body portion 185.
  • the outer surface portion 192 is parallel to the inner surface portion 191 and faces away from the inner surface portion 191.
  • the tip surface portion 193 is at the end opposite the main body portion 185 in the longitudinal direction of the back plate 171.
  • the tip surface portion 193 extends perpendicularly to the inner surface portion 191 and the outer surface portion 192.
  • the protruding portion 176 has an attachment hole 194 that penetrates the protruding portion 176 in the thickness direction.
  • a return spring 196 is attached to this attachment hole 194 by a rivet 195 as shown in FIG. 5.
  • the return spring 196 is attached to the surface of the protruding portion 176 opposite the lining 173 in the thickness direction as shown in FIG. 2.
  • the protrusion 176 on the inward rotation side of the second friction pad 27 in the forward disc rotation direction engages with the outer pad support portion 101 attached to the third connection portion 51 of the first pad spring 24.
  • the protrusion 176 on the outward rotation side of the second friction pad 27 in the forward disc rotation direction engages with the outer pad support portion 101A attached to the fourth connection portion 52 of the second pad spring 25. This causes the second friction pad 27 to align its longitudinal direction with the disc rotation direction.
  • the protrusion 176 on the forward disc rotation direction rotation side of the second friction pad 27 abuts against the inner support plate portion 123 (shown in FIG. 7) of the outer side spring plate portion 121 of the first pad spring 24 at the inner surface portion 191 on the radially inner side of the disc, and this inner support plate portion 123 is elastically deformed inward in the disc radial direction so as to approach the extension plate portion 114, and is inserted into the outer side guide recess 120 (shown in FIG. 5) of the first pad spring 24.
  • the main body portion 185 of the second friction pad 27 abuts against the support plate portion 133 (shown in FIG. 7) of the outer side spring plate portion 131 of the first pad spring 24 at the end surface 184 on the forward disc rotation direction rotation side, and this support plate portion 133 is elastically deformed outward in the disc rotation direction so as to approach the outer plate portion 111.
  • the protrusion 176 on the forward rotation side of the second friction pad 27 shown in FIG. 5 contacts the inner support plate 123 (see FIG.
  • the second friction pad 27 is supported by the third connection part 51 with the protrusion 176 on the forward disc rotation direction rotation-in side inserted into the engagement recess 75 of the third connection part 51 of the mounting member 20.
  • the second friction pad 27 is supported by the fourth connection part 52 with the protrusion 176 on the forward disc rotation direction rotation-out side inserted into the engagement recess 75 of the fourth connection part 52 of the mounting member 20.
  • the protrusion 176 on the forward rotation side of the second friction pad 27 is pressed radially outwardly on the disk by the biasing force of the outer spring plate portion 121 of the first pad spring 24.
  • the outer spring plate portion 121 of the first pad spring 24 elastically supports the second friction pad 27 in the radial direction of the disk.
  • the main body 185 of the second friction pad 27 is pressed toward the forward rotation side of the disk due to the biasing force of the outer spring plate portion 131 of the first pad spring 24.
  • the outer spring plate portion 131 of the first pad spring 24 elastically supports the second friction pad 27 in the disk rotation direction.
  • the protrusion 176 on the rotation side of the second friction pad 27 in the forward disc rotation direction is pressed radially outwardly on the disc by the biasing force of the outer spring plate portion 121 of the second pad spring 25.
  • the outer spring plate portion 121 of the second pad spring 25 elastically supports the second friction pad 27 in the disc radial direction.
  • the second friction pad 27 is biased radially outwardly of the disk by the biasing force of the outer spring plate portion 121 of the first pad spring 24 and the outer spring plate portion 121 of the second pad spring 25.
  • the second friction pad 27 thus biased has the protrusion 176 on the forward disk rotation direction inward side pressed against the outer support plate portion 112 of the outer guide recess 120 of the first pad spring 24 at the outer surface portion 192, thereby coming into face contact.
  • the second friction pad 27 is biased toward the forward disc rotation direction rotation side by the biasing force of the outer spring plate portion 131 of the first pad spring 24.
  • the protrusion 176 on the forward disc rotation direction rotation side is pressed against the wall plate portion 113A of the outer guide recess 120A of the second pad spring 25 at the tip surface portion 193 of its outer end in the disc rotation direction, making face contact.
  • the outer side guide recess 120 of the first pad spring 24 has a wall plate portion 113 that curves from the third surface portion 63 of the torque receiving portion 60 of the third connection portion 51 toward the second friction pad 27.
  • This wall plate portion 113 also elastically supports the second friction pad 27 in the disk rotation direction when the tip surface portion 193 of the protrusion portion 176 on the rotation side of the disk rotation direction when the second friction pad 27 advances abuts against it.
  • the spring constant of the spring plate portion 131 and the wall plate portion 113 on the outer side of the first pad spring 24 is smaller than the spring constant of the wall plate portion 113.
  • the disc brake 10 is in the first state in which one of the outer spring plate portion 131 and the wall plate portion 113 of each of the first pad springs 24 abuts against the second friction pad 27, and the other has a gap S between it and the second friction pad 27.
  • the outer spring plate portion 131 of the first pad spring 24 is disposed radially outward of the outer wall plate portion 113.
  • the second friction pad 27 has a gap S between it and the outer wall plate portion 113 of the first pad spring 24 due to the support of the outer spring plate portion 131 of the first pad spring 24.
  • the first pad spring 24 has a spring plate portion 121 on the outer side that abuts against the second friction pad 27 and supports the second friction pad 27 radially outward from the disc.
  • the apex of the curve of the outer wall plate portion 113 of the first pad spring 24 abuts against the center of the protrusion 176 on the outgoing side of the disc rotation direction in reverse of the second friction pad 27 in the direction of the disc radial reference line.
  • the protrusion 176 on the inward rotation side of the first friction pad 26 in the forward disc rotation direction engages with the inner pad support portion 101 attached to the first connection portion 46 of the first pad spring 24.
  • the protrusion 176 on the outward rotation side of the first friction pad 26 in the forward disc rotation direction engages with the inner pad support portion 101A attached to the second connection portion 47 of the second pad spring 25. This causes the first friction pad 26 to align its longitudinal direction with the disc rotation direction.
  • the protrusion 176 on the forward disc rotation direction rotation side of the first friction pad 26 abuts against the inner support plate portion 123 shown in FIG. 7 of the inner side spring plate portion 121 of the first pad spring 24 at the inner surface portion 191 on the radially inner side of the disc, and this inner support plate portion 123 is elastically deformed so as to approach the extension plate portion 114, and is inserted into the guide recess 120 of the first connection portion 46 shown in FIG. 4.
  • the main body portion 175 of the first friction pad 26 abuts against the support plate portion 133 shown in FIG.
  • the first friction pad 26 is supported by the first connection part 46 with the protrusion 176 on the forward disc rotation direction rotation-in side inserted into the engagement recess 75 of the first connection part 46 of the mounting member 20.
  • the first friction pad 26 is supported by the second connection part 47 with the protrusion 176 on the forward disc rotation direction rotation-out side inserted into the engagement recess 75 of the second connection part 47 of the mounting member 20.
  • the protrusion 176 on the forward rotation side of the first friction pad 26 is pressed radially outwardly on the disk by the biasing force of the inner spring plate portion 121 of the first pad spring 24.
  • the inner spring plate portion 121 of the first pad spring 24 elastically supports the first friction pad 26 in the radial direction of the disk.
  • the main body 175 of the first friction pad 26 is pressed toward the forward rotation side of the disc rotation direction by the biasing force of the inner spring plate portion 131 of the first pad spring 24.
  • the inner spring plate portion 131 of the first pad spring 24 elastically supports the first friction pad 26 in the disc rotation direction.
  • the protrusion 176 on the rotation side of the first friction pad 26 in the forward disc rotation direction is pressed radially outwardly on the disc by the biasing force of the inner spring plate portion 121 of the second pad spring 25.
  • the inner spring plate portion 121 of the second pad spring 25 elastically supports the first friction pad 26 in the disc radial direction.
  • the first friction pad 26 is biased radially outwardly of the disk by the biasing force of the spring plate portion 121 on the inner side of the first pad spring 24 and the spring plate portion 121 on the inner side of the second pad spring 25.
  • the protrusion 176 on the forward disk rotation direction rotation side of the first friction pad 26 is pressed against the outer support plate portion 112 of the inner guide recess 120 of the first pad spring 24 at the outer surface portion 192, making face contact.
  • the protrusion 176 on the forward disc rotation direction inlet side of the first friction pad 26 is supported by the guide recess 120 on the inner side of the first pad spring 24 so that it can move in the disc axial direction.
  • the first friction pad 26 is biased toward the forward disc rotation direction rotation side by the biasing force of the inner spring plate portion 131 of the first pad spring 24.
  • the protrusion 176 on the forward disc rotation direction rotation side is pressed against the wall plate portion 113A of the inner guide recess 120A of the second pad spring 25 at the tip surface portion 193 of its outer end in the disc rotation direction, making face contact.
  • the tip surface portion 193 of the protrusion 176 on the forward rotation side of the first friction pad 26 does not come into contact with the wall plate portion 113 of the inner guide recess 120 of the first pad spring 24, and a gap is formed between the wall plate portion 113 and the first friction pad 26 in the direction of disk rotation.
  • the guide recess 120 on the inner side of the first pad spring 24 has a wall plate portion 113 that curves from the third surface portion 63 of the torque receiving portion 60 of the first connection portion 46 toward the first friction pad 26.
  • This wall plate portion 113 also elastically supports the first friction pad 26 in the disk rotation direction when the tip surface portion 193 of the protrusion portion 176 on the rotation-in side of the disk rotation direction when the first friction pad 26 advances abuts against it.
  • the spring constant of the spring plate portion 131 and the wall plate portion 113 on the inner side of both the first pad spring 24 is smaller than the spring constant of the wall plate portion 113.
  • the above-described state of the disc brake 10 is a first state in which one of the inner side spring plate portion 131 and the wall plate portion 113 of each of the first pad springs 24 abuts against the first friction pad 26, and the other has a gap between it and the first friction pad 26.
  • the inner side spring plate portion 131 of the first pad spring 24 is disposed radially outward of the inner side wall plate portion 113.
  • This first state is a state in which the first friction pad 26 has a gap between it and the inner side wall plate portion 113 of the first pad spring 24 due to the support of the inner side spring plate portion 131 of the first pad spring 24.
  • the first pad spring 24 has a spring plate portion 121 on the inner side that abuts against the first friction pad 26 and supports the first friction pad 26 radially outward from the disc.
  • the apex of the curve of the inner wall plate portion 113 of the first pad spring 24 abuts against the center of the protrusion 176 of the first friction pad 26 on the outgoing side of the disc rotation direction during reverse braking, in the direction of the disc radial reference line.
  • the second outer friction pad 27 has its lining 173 facing the second outer braking surface 11b of the disk 11.
  • the first inner friction pad 26 has its lining 173 facing the first inner braking surface 11a of the disk 11.
  • the second friction pad 27 comes into contact with the second braking surface 11b of the disk 11 on the side of the lining 173 opposite the back plate 172.
  • the first friction pad 26 comes into contact with the first braking surface 11a of the disk 11 on the side of the lining 173 opposite the back plate 171.
  • the wear sensor 183 attached to the first inner friction pad 26 is positioned on the inward rotation side of the first friction pad 26 in the forward disc rotation direction.
  • a pair of return springs 196 provided on the inner first friction pad 26 are arranged on both ends of the first friction pad 26 in the disk rotation direction.
  • the return spring 196 attached to the inward rotation side of the first friction pad 26 in the forward disk rotation direction abuts against the surface of the first connection part 46 on the opposite side to the disk 11 in the disk axial direction.
  • the return spring 196 attached to the outward rotation side of the first friction pad 26 in the forward disk rotation direction abuts against the surface of the second connection part 47 on the opposite side to the disk 11 in the disk axial direction.
  • a pair of return springs 196 provided on the outer second friction pad 27 are arranged on both ends of the second friction pad 27 in the disk rotation direction.
  • the return spring 196 attached to the inward rotation side of the second friction pad 27 in the forward disk rotation direction abuts against the surface of the third connection part 51 opposite the disk 11 in the disk axial direction.
  • the return spring 196 attached to the outward rotation side of the second friction pad 27 in the forward disk rotation direction abuts against the surface of the fourth connection part 52 opposite the disk 11 in the disk axial direction.
  • the caliper 21 includes a caliper body 201, a first slide pin 202, a second slide pin 203, a mounting bolt 204, a mounting bolt (not shown), and a piston (not shown).
  • the caliper 21 has a shape that is approximately mirror symmetrical, with a radial reference line and a radial reference plane passing through the center of the caliper 21 in the disk rotation direction.
  • the caliper 21 has a first slide pin 202 fixed to the caliper body 201 by a mounting bolt 204.
  • the caliper 21 has a second slide pin 203 fixed to the caliper body 201 by a mounting bolt (not shown).
  • the pair of first slide pin 202 and second slide pin 203 are aligned with each other in the axial direction and arranged parallel to each other.
  • the mounting member 20 is formed with a first pin insertion hole (not shown) that extends along the disk axis direction from the inner end face of the first connecting portion 33 to a midway position within the first connecting portion 33.
  • the mounting member 20 is also formed with a second pin insertion hole (not shown) that extends along the disk axis direction from the inner end face of the second connecting portion 34 to a midway position within the second connecting portion 34.
  • the caliper 21 has a first slide pin 202 that slidably fits into the first pin insertion hole (not shown) of the mounting member 20.
  • the caliper 21 has a second slide pin 203 that slidably fits into the second pin insertion hole (not shown) of the mounting member 20.
  • the caliper 21 is supported on the mounting member 20 via the first slide pin 202 and the second slide pin 203 so that the caliper body 201 can slide along the disk axial direction.
  • the mounting member 20 supports the caliper 21 at the pair of first connecting portions 33 and second connecting portions 34 so that the caliper 21 can slide in the disk axial direction.
  • the caliper 21 is provided on the mounting member 20 so as to be movable in the disk axial direction.
  • the first pin boot 22 covers the portion of the first slide pin 202 that protrudes from the mounting member 20.
  • the second pin boot 23 covers the portion of the second slide pin 203 that protrudes from the mounting member 20.
  • the caliper body 201 has a shape that is approximately mirror symmetric.
  • the radial reference line and the radial reference plane pass through the center position of the caliper body 201 in the disk rotation direction.
  • the caliper body 201 includes a cylinder portion 221, a bridge portion 222, a claw portion 223, a first pin arrangement portion 224, and a second pin arrangement portion 225.
  • the cylinder portion 221 is disposed on the inner side of the disk 11 in the disk axial direction.
  • the bridge portion 222 extends from the outer portion of the cylinder portion 221 in the disk radial direction to the outer side along the disk axial direction so as to straddle the outer circumference of the disk 11.
  • the claw portion 223 extends from the portion of the bridge portion 222 opposite the cylinder portion 221 in the disk radial direction to the inner side and is disposed on the outer side of the disk 11.
  • the first pin arrangement portion 224 is disposed on the inward side of the disk rotation direction when moving forward than the cylinder portion 221.
  • the second pin arrangement portion 225 is disposed on the outward side of the disk rotation direction when moving forward than the cylinder portion 221.
  • the first slide pin 202 of the caliper body 201 is fixed to the first pin arrangement portion 224 by the mounting bolt 204.
  • the second slide pin 203 of the caliper body 201 is fixed to the second pin arrangement portion 225 by the mounting bolt (not shown).
  • the cylinder portion 221 has a cylinder hole (not shown).
  • the cylinder hole (not shown) is recessed in the opposite direction from the disk 11 from the end face of the cylinder portion 221 on the disk 11 side in the disk axial direction. Therefore, the cylinder hole (not shown) is open to the disk 11 side.
  • the cylinder hole (not shown) is aligned along the disk axial direction.
  • the cylinder portion 221 has a plurality of cylinder holes (not shown), specifically two holes, arranged in the disk circumferential direction. Each of these cylinder holes (not shown) accommodates a piston (not shown). Therefore, the caliper 21 is a two-pot type caliper.
  • the claw portion 223 is provided opposite the cylinder portion 221 in the disk axial direction.
  • the piston (not shown) is housed in a cylinder hole (not shown) of the cylinder portion 221 so that it can move in the disk axial direction.
  • the piston (not shown) faces the first braking surface 11a of the disk 11.
  • a first friction pad 26 is disposed between the first braking surface 11a of the disk 11 and the piston (not shown). When the piston (not shown) advances toward the first braking surface 11a of the disk 11, it presses against the first friction pad 26.
  • brake fluid When braking while the vehicle is moving forward, brake fluid is introduced into the disc brake 10 between the cylinder hole (not shown) of the cylinder portion 221 of the caliper 21 and the piston (not shown) via brake piping (not shown). Then, brake fluid pressure acts on the piston (not shown) in the cylinder portion 221 of the caliper 21, and the piston (not shown) advances toward the disc 11. The piston (not shown) advancing in this manner presses the first inner friction pad 26 disposed between the disc 11 and the piston (not shown) toward the disc 11.
  • the first inner friction pad 26 is guided by the mounting member 20 via the first pad spring 24 and the second pad spring 25 and moves in the disc axial direction, and comes into contact with one of the first braking surfaces 11a of the disc 11 at the lining 173 and is pressed against the disc 11.
  • the first friction pad 26 on the inner side is also pressed toward the forward disk rotation direction rotation side by the frictional force with the rotating disk 11. Then, the torque receiving portion 60 of the second connection portion 47 on the forward disk rotation direction rotation side and inner side of the mounting member 20 shown in FIG. 4 receives a braking torque from the protrusion 176 on the forward disk rotation direction rotation side of the first friction pad 26 via the wall plate portion 113A of the inner guide recess 120A of the second pad spring 25.
  • the caliper 21 shown in FIG. 1 moves in the disk axial direction by sliding the first slide pin 202 and the second slide pin 203 relative to the mounting member 20 due to the reaction force of the piston (not shown). Then, the claw portion 223 of the caliper body 201 presses the outer side second friction pad 27 arranged between the claw portion 223 and the disk 11 toward the disk 11. Then, the outer side second friction pad 27 is guided by the mounting member 20 via the first pad spring 24 and the second pad spring 25 and moves in the disk axial direction, and comes into contact with the other second braking surface 11b of the disk 11 at the lining 173 and is pressed against the disk 11.
  • the second friction pad 27 on the outer side is also pressed toward the forward disk rotation direction rotation side by the frictional force with the rotating disk 11. Then, the torque receiving portion 60 of the fourth connection portion 52 on the forward disk rotation direction rotation side and outer side of the mounting member 20 shown in FIG. 5 receives a braking torque from the protruding portion 176 on the forward disk rotation direction rotation side of the second friction pad 27 via the wall plate portion 113A of the outer guide recess 120A of the second pad spring 25.
  • the caliper 21 presses the first friction pad 26 against the first braking surface 11a of the disk 11, and the second friction pad 27 against the second braking surface 11b of the disk 11.
  • the disk brake 10 applies frictional resistance to the disk 11 to generate a braking force.
  • the caliper 21 is a so-called fist-type (slide-type) caliper.
  • the disc brake 10 presses the first friction pad 26 against the first braking surface 11a of the disc 11 and the second friction pad 27 against the second braking surface 11b of the disc 11, as described above. At that time, the first friction pad 26 and the second friction pad 27 are pressed against the rotating side of the disc rotation direction when reversing, which is the opposite to the above, by the disc 11 rotating in the opposite direction to the above.
  • the first friction pad 26 presses the inner spring plate portion 131 of the first pad spring 24 toward the reverse disk rotation direction rotation side with the end surface 184 of the main body portion 175 on the reverse disk rotation direction rotation side, causing elastic deformation. Then, the first friction pad 26 abuts against the apex of the curve of the inner wall plate portion 113 of the first pad spring 24 at the center in the direction of the disk radial reference line of the protrusion 176 on the reverse disk rotation direction rotation side. Then, this protrusion 176 presses the wall plate portion 113 toward the reverse disk rotation direction rotation side with its tip surface portion 193, causing elastic deformation.
  • this wall plate portion 113 finally becomes flat and comes into surface contact with the tip surface portion 193 of the protrusion 176 on the reverse disk rotation direction rotation side of the first friction pad 26 and the third surface portion 63, which is the torque receiving surface of the torque receiving portion 60 of the first connection portion 46.
  • the disc brake 10 goes from this state to a second state in which the gap between the tip surface portion 193 of the protrusion 176 on the reverse disc rotation direction rotation side of the first friction pad 26 and the inner wall plate portion 113 of the first pad spring 24 is filled by the movement of the first friction pad 26.
  • the torque receiving portion 60 of the first connection portion 46 on the reverse disc rotation direction rotation side and inner side of the mounting member 20 receives braking torque from the protrusion 176 on the reverse disc rotation direction rotation side of the first friction pad 26 via the inner wall plate portion 113 of the first pad spring 24 at the third surface portion 63.
  • the second friction pad 27 then abuts against the apex of the curve of the outer wall plate portion 113 of the first pad spring 24 at the center in the direction of the disk radial reference line of the protruding portion 176 on the reverse disc rotation direction rotation side.
  • the protruding portion 176 then presses the wall plate portion 113 toward the reverse disc rotation direction rotation side with its tip surface portion 193, causing it to elastically deform.
  • the wall plate portion 113 finally becomes flat and comes into surface contact with the tip surface portion 193 of the protrusion portion 176 on the outgoing side of the reverse disc rotation direction of the second friction pad 27 and the third surface portion 63, which is the torque receiving surface of the torque receiving portion 60 of the third connection portion 51.
  • the disc brake 10 goes from this state to a second state in which the gap S between the tip surface portion 193 of the protrusion 176 on the reverse disc rotation direction rotation side of the second friction pad 27 and the outer wall plate portion 113 of the first pad spring 24 is filled by the movement of the second friction pad 27.
  • the torque receiving portion 60 of the third connection portion 51 on the reverse disc rotation direction rotation side and outer side of the mounting member 20 receives braking torque from the protrusion 176 on the reverse disc rotation direction rotation side of the second friction pad 27 via the outer wall plate portion 113 of the first pad spring 24 at the third surface portion 63.
  • Patent Document 1 discloses a disc brake having a pad spring that is attached to a mounting member and elastically supports a friction pad.
  • the friction pad may move within the mounting member and generate a striking sound, a so-called clunking sound, between the mounting member and the friction pad.
  • the first pad spring 24 on the rotation side of the disc rotation direction during forward movement has an outer side spring plate portion 131 and a guide recess 120.
  • the outer side spring plate portion 131 of the first pad spring 24 elastically supports the second friction pad 27 in the disc rotation direction.
  • the outer side guide recess 120 of the first pad spring 24 is offset in the disc radial direction from the outer side spring plate portion 131, covers the outer side torque receiving portion 60, and elastically supports the second friction pad 27 in the disc rotation direction.
  • the disc brake 10 has a first state and a second state on the outer side.
  • the spring plate portion 131 which is one of the outer side spring plate portion 131 and the guide recess 120 of each of the first pad springs 24, abuts against the second friction pad 27, and the other guide recess 120 has a gap S between the wall plate portion 113 and the second friction pad 27.
  • the gap S is filled by the movement of the second friction pad 27. Therefore, when the disc brake 10 changes from a braking state for forward travel to a braking state for reverse travel, the second friction pad 27 on the outer side moves from the first state to the rotation side in the reverse disc rotation direction, elastically deforming the outer side spring plate portion 131 of the first pad spring 24.
  • the second friction pad 27 elastically deforms both the outer side spring plate portion 131 of the first pad spring 24 and the wall plate portion 113 of the guide recess 120, and the second state is reached in which the gap S between the wall plate portion 113 and the second friction pad 27 is filled. Therefore, the first pad spring 24 elastically deforms in stages to absorb the collision energy of the second friction pad 27 against the mounting member 20.
  • the disc brake 10 can suppress abnormal noises such as clunking noises that are generated between the second friction pad 27 and the mounting member 20 when the second friction pad 27 moves within the mounting member 20 and the mounting member 20 when the vehicle goes from a braking state when moving forward to a braking state when moving backward.
  • each of the first pad springs 24 has an inner side spring plate portion 131 and a guide recess 120.
  • the inner side spring plate portion 131 of the first pad spring 24 elastically supports the first friction pad 26 in the disk rotation direction.
  • the inner side guide recess 120 of the first pad spring 24 is offset in the disk radial direction from the inner spring plate portion 131, covers the inner side torque receiving portion 60, and elastically supports the first friction pad 26 in the disk rotation direction.
  • the disc brake 10 also has a first state and a second state on the inner side.
  • the spring plate portion 131 which is one of the inner side spring plate portion 131 and the guide recess 120 of each of the first pad springs 24, abuts against the first friction pad 26, and the other guide recess 120 has a gap between the wall plate portion 113 and the first friction pad 26.
  • the gap is filled by the movement of the first friction pad 26. Therefore, when the disc brake 10 changes from a braking state for forward travel to a braking state for reverse travel, the first friction pad 26 on the inner side moves from the first state to the rotation side in the reverse disc rotation direction, elastically deforming the inner side spring plate portion 131 of the first pad spring 24.
  • the first friction pad 26 elastically deforms both the inner side spring plate portion 131 of the first pad spring 24 and the wall plate portion 113 of the guide recess 120, and enters the second state in which the gap between the wall plate portion 113 and the first friction pad 26 is filled. Therefore, the first pad spring 24 elastically deforms in stages to absorb the collision energy of the first friction pad 26 against the mounting member 20.
  • the disc brake 10 can suppress abnormal noises such as clunking noises that are generated between the first friction pad 26 and the mounting member 20 when the first friction pad 26 moves within the mounting member 20 and the mounting member 20 when the vehicle goes from a braking state when moving forward to a braking state when moving backward.
  • the disc brake 10 When the disc brake 10 is in a non-braking state, it is in the first state, and the second friction pad 27 can be pressed toward the forward disc rotation direction by the outer spring plate portion 131 of the first pad spring 24. Therefore, when braking is applied from a non-braking state while the vehicle is moving forward, the second friction pad 27 moves within the mounting member 20 toward the forward disc rotation direction, and the disc brake 10 can suppress the generation of abnormal noise generated between the mounting member 20 and the second friction pad 27.
  • the first friction pad 26 when the disc brake 10 is in a non-braking state, the first friction pad 26 can be pressed toward the forward disc rotation direction by the inner spring plate portion 131 of the first pad spring 24, and this can suppress the generation of abnormal noise between the mounting member 20 and the first friction pad 26 that occurs when the first friction pad 26 moves toward the forward disc rotation direction within the mounting member 20 during braking from a non-braking state while the vehicle is moving forward.
  • the disc brake 10 When the disc brake 10 is in the first state upon braking release, the second friction pad 27 is pressed toward the forward disc rotation direction only by the spring plate portion 131, which is one of the outer spring plate portion 131 and the wall plate portion 113 of the guide recess 120 of each of the first pad springs 24. Therefore, the disc brake 10 can reduce the frictional force between the second friction pad 27 and the outer guide recess 120 of the second pad spring 25 upon braking release, and can suppress dragging of the second friction pad 27 against the disc 11 upon braking release.
  • the disc brake 10 when the disc brake 10 is in the first state upon braking release, the first friction pad 26 is pressed toward the forward disc rotation direction only by the inner spring plate portion 131 of each of the first pad springs 24 and the spring plate portion 131, which is one of the wall plate portions 113 of the guide recess 120. Therefore, the disc brake 10 can reduce the frictional force between the first friction pad 26 and the inner guide recess 120 of the second pad spring 25 upon braking release, and can suppress dragging of the first friction pad 26 against the disc 11 upon braking release.
  • the disc brake 10 may have a first state in which the outer spring plate 131 and the wall plate 113 of the guide recess 120, which is one of the guide recess 120, of each of the first pad springs 24, are in contact with the second friction pad 27, and the other spring plate 131 has a gap between the second friction pad 27, and a second state in which the gap is filled by the movement of the second friction pad 27.
  • the disc brake 10 may have a first state in which the inner spring plate 131 and the wall plate 113 of the guide recess 120, which is one of the guide recess 120, of each of the first pad springs 24, are in contact with the first friction pad 26, and the other spring plate 131 has a gap between the first friction pad 26, and a second state in which the gap is filled by the movement of the first friction pad 26. In either case, the same effect as above is achieved.
  • the outer side spring plate portion 131 of the first pad spring 24 is disposed radially outward of the outer side guide recess 120, and in the first state described above, the outer side spring plate portion 131 abuts against the second friction pad 27, and the outer side guide recess 120 has a gap S between the wall plate portion 113 and the second friction pad 27. Therefore, in the non-braking state, the disc brake 10 is in the first state, and the second friction pad 27 can be pressed toward the rotation direction of the disc when moving forward by the outer side spring plate portion 131 disposed radially outward of the outer side guide recess 120 of the first pad spring 24. Therefore, the disc brake 10 can effectively suppress rattling of the second friction pad 27 in the non-braking state while the vehicle is moving forward.
  • the inner side spring plate portion 131 of the first pad spring 24 is arranged radially outward of the inner side guide recess 120, and in the first state described above, the inner side spring plate portion 131 abuts against the first friction pad 26, and the inner side guide recess 120 has a gap between the wall plate portion 113 and the first friction pad 26. Therefore, in the non-braking state, the disc brake 10 is in the first state, and the first friction pad 26 can be pressed toward the rotation side of the disc rotation direction during forward movement by the inner side spring plate portion 131 arranged radially outward of the inner side guide recess 120 of the first pad spring 24. Therefore, the disc brake 10 can effectively suppress rattling of the first friction pad 26 in the non-braking state while the vehicle is moving forward.
  • the spring constant of the outer side spring plate portion 131 of the first pad spring 24 is smaller than the spring constant of the wall plate portion 113 of the outer side guide recess 120. Therefore, when braking is released, the outer side spring plate portion 131 of the first pad spring 24, which has a lower spring constant than the wall plate portion 113 of the outer side guide recess 120, presses the second friction pad 27 toward the rotation side in the forward disc rotation direction. Therefore, the disc brake 10 can further suppress drag of the second friction pad 27 on the disc 11 when braking is released.
  • the spring constant of the inner side spring plate portion 131 of the first pad spring 24 is smaller than the spring constant of the wall plate portion 113 of the inner side guide recess 120. Therefore, when braking is released, the disc brake 10 presses the first friction pad 26 toward the rotation side in the forward disc rotation direction by the inner side spring plate portion 131 of the first pad spring 24, which has a lower spring constant than the wall plate portion 113 of the inner side guide recess 120. Therefore, the disc brake 10 can further suppress drag of the first friction pad 26 on the disc 11 when braking is released.
  • the guide recess 120 on the outer side of the first pad spring 24 has a wall plate portion 113 that curves from the third surface portion 63, which is the torque receiving surface of the torque receiving portion 60 on the outer side and on the side on which the disc rotates in the forward direction, toward the second friction pad 27. Therefore, the disc brake 10 can achieve the above-mentioned effect with a simple structure in which the shape of the wall plate portion 113 of the guide recess 120 on the outer side of the first pad spring 24 is curved.
  • the disc brake 10 has a wall plate portion 113 in which the guide recess 120 on the inner side of the first pad spring 24 curves from the third surface portion 63, which is the torque receiving surface of the torque receiving portion 60 on the inner side and on the forward disc rotation direction rotation-in side, toward the first friction pad 26. Therefore, the disc brake 10 can achieve the above-mentioned effect with a simple structure in which the shape of the wall plate portion 113 of the guide recess 120 on the inner side of the first pad spring 24 is curved.
  • the disc brake 10 has an outer side spring plate portion 121 where the first pad spring 24 on the rotation side of the disc rotation direction during forward movement abuts against the second friction pad 27 and supports the second friction pad 27 radially outward from the disc.
  • the apex of the curve of the wall plate portion 113 of the outer side guide recess 120 of the first pad spring 24 abuts against the center of the protrusion 176 located within the torque receiving portion 60 on the rotation side of the disc rotation direction during forward movement of the second friction pad 27. Therefore, the disc brake 10 can effectively generate a biasing force on the second friction pad 27 by the wall plate portion 113 of the outer side guide recess 120 of the first pad spring 24.
  • the disc brake 10 also has an inner-side spring plate portion 121 where the first pad spring 24 on the rotation side of the disc rotation direction when moving forward abuts against the first friction pad 26 and supports the first friction pad 26 radially outward from the disc.
  • the apex of the curve of the wall plate portion 113 of the inner-side guide recess 120 of the first pad spring 24 abuts against the center of the protrusion 176 located within the torque receiving portion 60 on the rotation side of the disc rotation direction when moving forward. Therefore, the disc brake 10 can effectively generate a biasing force on the first friction pad 26 by the wall plate portion 113 of the inner-side guide recess 120.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)

Abstract

L'invention concerne un ressort de plaquette (24) sur un côté d'entrée de rotation dans une direction de rotation de disque comprenant : une première partie de support (131) qui supporte élastiquement une plaquette de frottement (27) dans la direction de rotation de disque ; et une seconde partie de support (120) qui est décalée dans une direction radiale de disque par rapport à la première partie de support (131), recouvre une partie de réception de couple (60) et supporte élastiquement la plaquette de frottement (27) dans la direction de rotation de disque. L'une de la première partie de support (131) et de la seconde partie de support (120) est en contact avec la plaquette de frottement (27) et l'autre présente un premier état dans lequel il y a un espace (S) entre l'autre partie de support et la plaquette de frottement (27) et un second état dans lequel l'espace (S) est rempli par le mouvement de la plaquette de frottement (27).
PCT/JP2023/033161 2022-11-30 2023-09-12 Frein à disque WO2024116541A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022-191119 2022-11-30
JP2022191119 2022-11-30

Publications (1)

Publication Number Publication Date
WO2024116541A1 true WO2024116541A1 (fr) 2024-06-06

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PCT/JP2023/033161 WO2024116541A1 (fr) 2022-11-30 2023-09-12 Frein à disque

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WO (1) WO2024116541A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04107330A (ja) * 1990-08-28 1992-04-08 Toyota Motor Corp ディスクブレーキ
JP2000110862A (ja) * 1998-09-30 2000-04-18 Aisin Seiki Co Ltd ディスクブレーキ
JP2002250376A (ja) * 2001-02-22 2002-09-06 Aisin Seiki Co Ltd 車両用ディスクブレーキ
JP2008144889A (ja) * 2006-12-12 2008-06-26 Advics:Kk ディスクブレーキ
JP2010048363A (ja) * 2008-08-22 2010-03-04 Toyota Motor Corp ブレーキキャリパ
WO2011062160A1 (fr) * 2009-11-17 2011-05-26 株式会社アドヴィックス Dispositif de frein à disque
US20140305754A1 (en) * 2011-12-15 2014-10-16 Robert Bosch Gmbh Spring-Equipped Member for Guiding a Disc Brake Pad and Disc Brake provided with such Guiding Members
WO2019012805A1 (fr) * 2017-07-11 2019-01-17 日立オートモティブシステムズ株式会社 Frein à disque

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04107330A (ja) * 1990-08-28 1992-04-08 Toyota Motor Corp ディスクブレーキ
JP2000110862A (ja) * 1998-09-30 2000-04-18 Aisin Seiki Co Ltd ディスクブレーキ
JP2002250376A (ja) * 2001-02-22 2002-09-06 Aisin Seiki Co Ltd 車両用ディスクブレーキ
JP2008144889A (ja) * 2006-12-12 2008-06-26 Advics:Kk ディスクブレーキ
JP2010048363A (ja) * 2008-08-22 2010-03-04 Toyota Motor Corp ブレーキキャリパ
WO2011062160A1 (fr) * 2009-11-17 2011-05-26 株式会社アドヴィックス Dispositif de frein à disque
US20140305754A1 (en) * 2011-12-15 2014-10-16 Robert Bosch Gmbh Spring-Equipped Member for Guiding a Disc Brake Pad and Disc Brake provided with such Guiding Members
WO2019012805A1 (fr) * 2017-07-11 2019-01-17 日立オートモティブシステムズ株式会社 Frein à disque

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