WO2018003198A1 - Disc brake - Google Patents

Disc brake Download PDF

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Publication number
WO2018003198A1
WO2018003198A1 PCT/JP2017/010407 JP2017010407W WO2018003198A1 WO 2018003198 A1 WO2018003198 A1 WO 2018003198A1 JP 2017010407 W JP2017010407 W JP 2017010407W WO 2018003198 A1 WO2018003198 A1 WO 2018003198A1
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WO
WIPO (PCT)
Prior art keywords
cylinder
hole
bore
disk
disc brake
Prior art date
Application number
PCT/JP2017/010407
Other languages
French (fr)
Japanese (ja)
Inventor
史朗 長島
伸二 鈴木
Original Assignee
日立オートモティブシステムズ株式会社
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 日立オートモティブシステムズ株式会社 filed Critical 日立オートモティブシステムズ株式会社
Publication of WO2018003198A1 publication Critical patent/WO2018003198A1/en

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    • 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
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
    • F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
    • 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

Definitions

  • the present invention relates to a disc brake.
  • This application claims priority on June 28, 2016 based on Japanese Patent Application No. 2016-127700 filed in Japan, the contents of which are incorporated herein by reference.
  • Two cylinder holes are provided along the circumferential direction of the disk in the working part of the caliper body, a union boss part is provided in the central part of the disk circumferential direction on the side opposite to the disk rotor of this working part, and a union hole is provided in the union boss part.
  • a disc brake see, for example, Patent Document 1.
  • a disc brake in which two cylinder bores are formed in the cylinder portion, and a supply / exhaust port is formed in the cylinder portion at the bottom of the cylinder bore (see, for example, Patent Document 2).
  • there is a disc brake in which two cylinders are arranged in the caliper side by side in the disc rotation direction see, for example, Patent Document 3).
  • the present invention provides a disc brake that can be reduced in weight and size.
  • the disc brake has a cylinder in which pistons are respectively disposed in a plurality of cylinder bores that are located on at least one side of the disc and open at one end.
  • the disc brake presses the pad against the disc by the plurality of pistons.
  • the outer surface of the intermediate region between the cylinder bores at the bottom of the cylinder is flush with the outer surface of the bore bottom region at the position of the cylinder bore at the bottom of the cylinder, or is recessed from the outer surface of the bore bottom region. Has a recess.
  • a piping hole is formed in the intermediate region.
  • a punching portion may be provided in the intermediate region, and a hook for preventing rotation of a brake pipe attached to the pipe hole may be locked to the punching portion.
  • the piping hole may be formed at least up to a position closer to the opening side of the cylinder bore than the inner bottom surface of the cylinder bore.
  • the cylinder may be formed with communication holes that pass through the piping holes and communicate with the plurality of cylinder bores.
  • the cylinder may have a cylinder body portion that extends in the disk axial direction from the cylinder bottom portion.
  • the communication hole may be formed by a single linear hole that opens to the cylinder body and passes through one cylinder bore among the plurality of cylinder bores and extends to the other cylinder bore.
  • the communication hole may be formed to open to the upper side in the vertical direction of each cylinder bore.
  • the above-described disc brake can be reduced in weight and size.
  • FIG. 5 is a cross-sectional view taken along the line VV of FIG. 2 showing the caliper body of the disc brake according to the first embodiment of the present invention.
  • FIG. 5 is a cross-sectional view taken along the line VI-VI in FIG.
  • FIG. 3 showing the caliper body of the disc brake according to the first embodiment of the present invention.
  • FIG. 5 is a cross-sectional view taken along the line VII-VII in FIG. 4 showing the caliper body of the disc brake according to the first embodiment of the present invention.
  • 1 is a partial plan view showing a caliper body, brake piping, piping bolts, and the like of a disc brake according to a first embodiment of the present invention. It is a partial plane sectional view showing a caliper body, brake piping, piping bolts, etc. of a disc brake concerning a 1st embodiment of the present invention.
  • 1 is a partial side cross-sectional view showing a caliper body, brake piping, piping bolts and the like of a disc brake according to a first embodiment of the present invention.
  • 1 is a partial rear view showing a caliper body, brake piping, piping bolts and the like of a disc brake according to a first embodiment of the present invention. It is a rear view which shows the caliper body of the disc brake which concerns on 2nd Embodiment of this invention.
  • FIG. 1 shows a disc brake 10.
  • the disc brake 10 provides a braking force for a vehicle such as an automobile. Specifically, it is for front wheel braking of a four-wheeled vehicle.
  • the disc brake 10 brakes the vehicle by stopping the rotation of the disc 11 that rotates with a wheel (not shown).
  • the direction of the central axis of the disk 11 is referred to as a disk axial direction
  • the radial direction of the disk 11 is referred to as a disk radial direction
  • the circumferential direction of the disk is referred to as a disk circumferential direction.
  • the disc brake 10 includes a support member 12, a pair of pads 13 and 14, and a caliper 15.
  • the support member 12 is disposed across the outer peripheral side of the disk 11.
  • the support member 12 is fixed to the non-rotating part of the vehicle.
  • the pair of pads 13 and 14 are supported by the support member 12 so as to be movable in the disk axial direction, and are arranged to face both surfaces of the disk 11, respectively.
  • the caliper 15 is supported by the support member 12 so as to be movable in the disk axial direction.
  • the caliper 15 sandwiches the pair of pads 13 and 14 and presses them against both sides of the disk 11.
  • the caliper 15 has a caliper body 20, a piston 21, a piston seal 22, and a piston boot 23.
  • the caliper body 20 is formed by processing a material integrally formed by casting.
  • the caliper body 20 is specifically formed from an aluminum alloy.
  • the caliper body 20 can be made of cast iron.
  • the caliper body 20 includes a cylinder 26 positioned on one side of the disk 11 in the disk axial direction, a bridge portion 27 extending from the outer side of the cylinder 26 in the disk radial direction so as to straddle the outer periphery of the disk 11, and a cylinder of the bridge portion 27. 2 to 4 extend from the opposite side of the disk 26 in the radial direction of the disk and are located on the other side of the disk 11 in the disk axial direction, and extend from the cylinder 26 to both sides of the disk in the circumferential direction.
  • a pair of arms 29 shown.
  • the caliper body 20 is movably supported by the support member 12 shown in FIG. 1 with pins (not shown) attached to the pair of arm portions 29.
  • the cylinder 26 is formed with a cylinder bore 35 having one end opened toward the claw 28 and recessed toward the opposite side of the disk 11 in the disk axial direction. As shown in FIG. 5, the cylinder 26 is provided with a plurality of cylinder bores 35. Specifically, two cylinder bores 35 are provided. These cylinder bores 35 have the same shape. These cylinder bores 35 are provided side by side in the disk circumferential direction by aligning the positions in the disk axial direction and the disk radial direction and shifting the position in the disk circumferential direction.
  • the cylinder 26 By forming the plurality of cylinder bores 35, the cylinder 26 has a cylinder bottom portion 36 including inner bottom surfaces 38 of the plurality of cylinder bores 35 on the side opposite to the claw portion 28, and the claw portion 28 extends from the cylinder bottom portion 36.
  • a cylinder body portion 37 that extends to the side and includes the wall surfaces 39 of the plurality of cylinder bores 35 is provided.
  • one of the cylinder bores 35 is disposed so that the piston 21 can move in the disk axial direction.
  • a wall surface 39 of the cylinder bore 35 has a guide inner peripheral surface 41 that is a cylindrical surface that guides the movement of the piston 21.
  • the wall surface 39 of the cylinder bore 35 has an annular large-diameter groove 42 that is recessed more radially outward than the guide inner peripheral surface 41 on the cylinder bottom 36 side of the guide inner peripheral surface 41.
  • the large-diameter groove 42 has a groove bottom diameter larger than that of the guide inner peripheral surface 41.
  • the large-diameter groove 42 is disposed at the end of the cylinder bore 35 on the cylinder bottom 36 side.
  • the wall surface 39 of the cylinder bore 35 has an annular piston seal groove 45 that is recessed radially outward from the guide inner peripheral surface 41 at an intermediate position opposite to the cylinder bottom portion 36 of the guide inner peripheral surface 41.
  • the piston seal groove 45 has a groove bottom diameter larger than that of the guide inner peripheral surface 41.
  • an annular boot fitting hole 48 is formed on the claw portion 28 side of the cylinder bore 35, which is recessed radially outward from the guide inner peripheral surface 41 of the cylinder bore 35.
  • the boot fitting hole 48 is formed at an end position on the claw portion 28 side of the cylinder 26.
  • the inner diameter of the boot fitting hole 48 is larger than that of the guide inner peripheral surface 41 of the cylinder bore 35.
  • the boot fitting hole 48 has an inner diameter larger than the inner diameter of any position of the cylinder bore 35.
  • An opening 51 of the cylinder bore 35 is opened at the bottom of the boot fitting hole 48.
  • the guide inner peripheral surface 41, the large diameter groove 42, and the piston seal groove 45 of the wall surface 39 of the cylinder bore 35 are disposed in the cylinder body portion 37 of the cylinder 26.
  • the cylinder bore 35 has the above-described inner bottom surface 38 on the side opposite to the guide inner peripheral surface 41 of the large diameter groove 42.
  • the inner bottom surface 38 includes an annular R-chamfered surface 53 connected to the large-diameter groove 42, an annular flat annular surface 54 extending radially inward from an inner edge of the R-chamfered surface 53 in the radial direction, An annular projecting portion 55 projecting from the radially inner side of the annular surface 54 to the opening 51 is provided.
  • the R chamfered surface 53, the annular surface 54 and the protruding portion 55 of the inner bottom surface 38 are provided on the cylinder bottom 36 of the cylinder 26.
  • the large diameter groove 42 is formed at the time of casting the material of the caliper body 20, and is in a cast surface state.
  • the guide inner peripheral surface 41, the piston seal groove 45, and the boot fitting hole 48 are formed by cutting the material of the caliper body 20.
  • the cylinder bottom portion 36 is in a range in which the inner bottom surface 38 of one cylinder bore 35 is projected in the disk axial direction, and the entire surface of the inner bottom surface 38 overlaps the positions in the disk radial direction and the disk circumferential direction.
  • the bore bottom region 61 constituting the bottom of one cylinder bore 35 and the inner bottom surface 38 of the other cylinder bore 35 are in a range projected in the disk axial direction, and the entire inner bottom surface 38, the disk radial direction and the disk circumferential direction Are overlapped with each other, and a bore bottom region 61 constituting the bottom of the other cylinder bore 35 and an intermediate region 62 between these bore bottom regions 61 are provided.
  • the intermediate region 62 is a region between the plurality of cylinder bores 35 in the cylinder bottom portion 36.
  • an outer bottom surface 63 of the cylinder bottom 36 opposite to the claw portion 28 of the cylinder 26 has a main surface portion 64 that spreads as a single plane perpendicular to the central axis of the cylinder bore 35. And a concave portion 65 that is recessed toward the claw portion 28 in the disc axial direction with respect to the main surface portion 64 formed at the center in the disc circumferential direction of the main surface portion 64.
  • the recess 65 is provided in the intermediate region 62.
  • the main surface portion 64 is composed of the entire outer surface 61 ⁇ / b> A of one bore bottom region 61 of the cylinder bottom portion 36, the entire outer surface 61 ⁇ / b> A of the other bore bottom region 61, and the intermediate region 62 therebetween. And a surface portion 62a excluding the concave portion 65 of the outer surface 62A.
  • the recessed portion 65 is recessed from the surface portion 62 a of the intermediate region 62.
  • the outer surface 62A of the intermediate region 62 has a recess 65 that is recessed from the outer surface 61A of the bore bottom region 61 at the position of the cylinder bore 35 of the cylinder bottom 36.
  • the recess 65 is a counterbore.
  • the recess 65 is formed by cutting the material of the caliper body 20, and its bottom surface 66 is a circular flat surface.
  • the material of the caliper body 20 is cast using a mold that uses the entire outer bottom surface 63 of the cylinder bottom 36 as a gate in order to suppress the formation of nests.
  • the caliper body 20 has a mirror-symmetric shape in the disk circumferential direction.
  • a pipe hole 68 extending from the concave portion 65 of the outer bottom surface 63 toward the claw portion 28 in the disk axial direction in an intermediate region 62 between the cylinder bore 35 and the cylinder bore 35 in the cylinder bottom portion 36. Is formed.
  • the piping hole 68 is formed by cutting the material of the caliper body 20.
  • the piping hole 68 extends from the center of the bottom surface 66 of the recess 65 toward the claw portion 28.
  • the piping hole 68 has a bottom hole 69 on the back side, and a female screw 70 is formed in a predetermined range on the opening side.
  • the piping hole 68 is parallel to the plurality of cylinder bores 35.
  • the piping hole 68 is disposed on a line connecting the central axes of the cylinder bores 35 and is disposed at a central position between the cylinder bores 35.
  • the pipe hole 68 does not overlap with any of the plurality of cylinder bores 35 in the circumferential direction of the disk.
  • the piping hole 68 is formed to the opening 51 side of the cylinder bore 35 from the tip surface of the protruding portion 55 of the inner bottom surface 38 of the cylinder bore 35.
  • the thickness of the cylinder bottom 36 is set so as to satisfy the relationship of the following formula. ing. (P / 2-B) /R ⁇ 1.35
  • the recess 65 and the piping hole 68 are provided at the center position in the disk circumferential direction of the caliper body 20.
  • a concave portion 81 is formed on the outer side in the disk radial direction so as to be recessed inward in the disk radial direction from the outer end position in the disk radial direction of the cylinder bottom portion 36.
  • a concave punching portion 83 is formed that is recessed inward in the radial direction of the disc from the bottom surface 82 inside the radial direction of the concave portion 81.
  • the shot-out portion 83 is aligned with the position of the pipe hole 68 in the disk axial direction and the disk circumferential direction, and is thus provided in the intermediate region 62 of the cylinder bottom 36.
  • the punching portion 83 is opened on the side opposite to the claw portion 28 in the disk axial direction.
  • the shot-out portion 83 has the same distance from each cylinder bore 35 shown in FIG.
  • a concave portion 85 that is recessed toward the outer side in the disk radial direction from the inner end position in the disk radial direction of the cylinder bottom portion 36 is also formed on the inner side in the disk radial direction. It is formed at the center in the disk circumferential direction.
  • the concave portion 81, the punched portion 83, and the concave portion 85 are in a state of casting, and are formed by a mold when the caliper body 20 is cast. At least the punching portion 83 is entirely in a cast surface state.
  • the cylinder 26 has projecting portions 91 projecting from the cylinder body portion 37 to both sides in the disk circumferential direction on the inner side of the pair of arm portions 29 in the disk radial direction. As shown in FIG. 4, the protruding portion 91 protrudes from the vicinity of the boundary between the arm portion 29 and the cylinder body portion 37.
  • a single linear communication hole 92 is formed in the cylinder 26.
  • the communication hole 92 extends from one projecting portion 91 to the cylinder bore 35 on the side close to the projecting portion 91, passes through the bottom of the piping hole 68, and extends to the cylinder bore 35 on the far side from the projecting portion 91. It extends.
  • the communication hole 92 has a large-diameter hole 93 that is disposed in the projecting portion 91 and opens, and a small-diameter hole 94 that passes through the piping hole 68 and communicates with one cylinder bore 35 and the other cylinder bore 35.
  • the communication hole 92 is formed by a single straight hole that opens to the cylinder body portion 37 and passes through one cylinder bore 35 and extends to the other cylinder bore 35 among the plurality of cylinder bores.
  • the large diameter hole 93 has a larger inner diameter than the small diameter hole 94.
  • the communication hole 92 is disposed on a plane whose central axis is perpendicular to the central axis of the cylinder bore 35.
  • the small diameter hole 94 opens at the position of the large diameter groove 42 of each cylinder bore 35.
  • the communication hole 92 is formed by drilling with a drill, and is further threaded into the large-diameter hole 93 to be screwed with a bleeder plug (not shown).
  • the large-diameter hole 93 is attached so as to be vertically upward.
  • the communication hole 92 is configured to open to the upper side in the vertical direction of each cylinder bore 35, and air can be released from each cylinder bore 35 by the communication hole 35.
  • a communication hole 92 is formed from one of both protrusions 91 according to the mounting position of the disc brake 10 on the vehicle.
  • a spherical sealing member may be driven into the large-diameter hole 93 to close the large-diameter hole 93.
  • a brake pipe 102 is connected to the caliper body 20. That is, as shown in FIGS. 9 and 10, the annular seal washer 101 is in contact with the bottom surface 66 of the recess 65 of the caliper body 20, and the joint 103 provided at the end of the brake pipe 102 is connected to the seal washer 101. It is in contact.
  • the joint 103 extends in the radial direction from the joint main body portion 105 and the joint main body portion 105 as shown in FIG. 11, and then extends in the axial direction of the joint main body portion 105 as shown in FIG. And a non-rotating hook 106. As shown in FIGS. 8, 10, and 11, the joint main body 105 is in contact with the seal washer 101 with the anti-rotation hook 106 engaged with the punching portion 83.
  • an annular seal washer 110 abuts on the opposite side of the joint body 105 from the seal washer 101.
  • the piping bolt 111 passes through the seal washer 110, the joint main body portion 105, and the seal washer 101 at the shaft portion 112, and is screwed into the female screw 70 of the piping hole 68.
  • the head 113 of the piping bolt 111 sandwiches the seal washer 101, the joint main body 105 and the seal washer 110 with the cylinder 26 of the caliper body 20, and the brake piping 102 is attached to the piping hole 68 with the piping bolt 111.
  • the piping bolt 111 is a union bolt or a banjo bolt, and has a configuration in which a passage 114 is formed.
  • the passage 114 communicates with the passage in the brake pipe 102 on the one hand, and communicates with the inside of the small diameter hole 94 of the communication hole 92 via the lower hole 69 on the hole bottom side of the piping bolt 111 of the piping hole 68 on the other hand.
  • the joint 103 is restricted from rotating around the piping bolt 111 with respect to the cylinder 26 by locking the rotation-preventing hook 106 to the punching portion 83.
  • the piston 21 includes a disk-shaped piston bottom 121 and a cylindrical piston body 122.
  • the piston 21 is formed in a bottomed cylindrical shape in which an end of the piston body 122 opposite to the piston bottom 121 is opened.
  • An annular locking groove 125 that is recessed radially inward from an outer diameter surface 124 formed of a cylindrical surface is formed in the piston body portion 122 on the side opposite to the piston bottom portion 121 in the axial direction.
  • the piston 21 is accommodated in the cylinder bore 35 so that the piston bottom 121 is positioned on the cylinder bottom 36 side in the cylinder bore 35. In this state, the tip of the piston 21 on the claw 28 side protrudes from the cylinder bore 35 toward the claw 28.
  • a locking groove 125 is formed on the tip side protruding from the cylinder bore 35 in this way.
  • the piston seal 22 is fitted in the piston seal groove 45 of the cylinder bore 35.
  • the piston 21 is fitted on the inner peripheral side of the piston seal 22.
  • the piston seal 22 seals the gap between the cylinder 26 and the piston 21 and supports the piston 21 so as to be movable in the axial direction with the guide inner peripheral surface 41 of the cylinder bore 35.
  • the piston boot 23 includes an annular large-diameter fitting portion 131 that fits into the boot fitting hole 48 of the cylinder 26, an annular small-diameter fitting portion 132 that fits into the locking groove 125 of the piston 21, and a space between them. And an expandable / contractible bellows portion 133.
  • the piston boot 23 covers an outer peripheral portion exposed from the cylinder 26 at a portion closer to the cylinder bore 35 than the locking groove 125 of the piston 21. As the piston boot 23 moves with respect to the cylinder 26, the intermediate bellows portion 133 that is not fixed to the cylinder 26 and the piston 21 expands and contracts.
  • Brake fluid is introduced into the pilot hole 69 of the piping hole 68 from the brake piping 102 shown in FIGS. 9 and 10 through the passage 114 of the piping bolt 111. Then, the brake fluid passes from the inside of the pilot hole 69 to the inside of the small diameter hole 94 shown in FIG. 7 and into the cylinder bores 35 of both the caliper bodies 20 from the large diameter groove 42 between the inner bottom surface 38 and the piston 21 shown in FIG. To be introduced. Then, brake pressure acts on the piston 21 in each of the cylinder bores 35 on both sides. As a result, both pistons 21 move forward toward the disk 11 side and press the pads 13 disposed between these pistons 21 and the disk 11 toward the disk 11. As a result, the pad 13 moves and contacts the disk 11.
  • the caliper body 20 is moved by the reaction force of the pressing, and the claw portion 28 presses the pad 14 disposed between the claw portion 28 and the disk 11 toward the disk 11. As a result, the pad 14 comes into contact with the disk 11.
  • the caliper 15 presses the disc 11 by holding the pair of pads 13 and 14 from both sides by the piston 21 and the claw portion 28 by the operation of the plurality of pistons 21. As a result, the caliper 15 gives a frictional resistance to the disk 11 to generate a braking force.
  • the disc brake described in Patent Document 1 two cylinder holes are provided side by side in the disk circumferential direction in the action part of the caliper body, and a union boss part is provided in the disk circumferential direction central part on the side opposite to the disk rotor of this action part.
  • a union hole is provided in the union boss portion.
  • the union boss part is provided at the central part in the disk circumferential direction of the action part so as to protrude to the side opposite to the disk rotor, and increases the weight of the caliper body.
  • the disc brake described in Patent Document 2 has two cylinder bores formed in the cylinder portion, and a supply / exhaust port is formed in the cylinder portion at the bottom of the cylinder bore.
  • the piping hole 68 is formed in the intermediate region 62 between the plurality of cylinder bores 35 in the cylinder bottom portion 36, and the outer surface 62 ⁇ / b> A of the intermediate region 62 of the cylinder bottom portion 36 is formed.
  • the recess 65 has a shape recessed from the outer surface 61A of the bore bottom region 61 at the position of the cylinder bore 35 in the cylinder bottom 36. Accordingly, the entire cylinder bottom 36 can be thinned while securing the screwing length of the piping hole 68. Accordingly, the caliper body 20 can be reduced in weight and size. As a result, the caliper 15 can be reduced in weight and size, and the disc brake 10 can be reduced in weight and size, thereby reducing mass and cost. can do.
  • the piping hole 68 is provided at the center position in the disk circumferential direction of the caliper body 20, the same processing is performed when the processing position of the piping hole 68 is attached to either the left or right side of the vehicle, and the number of processing steps can be reduced. The manufacturing cost can be reduced.
  • a punching portion 83 is provided in the intermediate region 62 of the cylinder bottom portion 36, and the anti-rotation hook 106 of the brake pipe 102 attached to the piping hole 68 is locked to the punching portion 83. It is not necessary to form a hole or groove for locking 106 by cutting, and the manufacturing cost can be reduced.
  • piping hole 68 is formed from the inner bottom surface 38 of the cylinder bore 35 to the opening 51 side of the cylinder bore 35, a single communication hole 92 for communicating the piping hole 68 to the plurality of cylinder bores 35 is formed.
  • the number of processing steps can be reduced, and the manufacturing cost can be reduced.
  • all of the outer surface 61A of one bore bottom region 61 of the cylinder 26, all of the outer surface 61A of the other bore bottom region 61 of the cylinder 26, and all of the outer surface 62A of the intermediate region 62 of the cylinder 26. are included in the outer bottom surface 63 of the cylinder bottom 36 and are arranged on the same plane. That is, in the second embodiment, the recess 65 of the first embodiment is not formed. In this case, for example, a protrusion is provided at the position of the recess 65 of the first embodiment at the time of casting, and the protrusion is cut and removed, thereby securing the flatness of the peripheral portion of the pipe hole 68 of the outer surface 62A and the intermediate region. All the outer surfaces 62A of 62 are made flat.
  • a piping hole 68 is formed in the intermediate region 62 of the cylinder bottom portion 36, and the outer surface 62 A of the intermediate region 62 of the cylinder bottom portion 36 has a plurality of bore bottom region 61 in the cylinder bottom portion 36. It is arranged in the same plane as the outer surface 61A.
  • the entire cylinder bottom 36 can be thinned while securing the threaded length of the piping hole 68. Therefore, the caliper body 20 can be reduced in weight and size.
  • the caliper 15 can be reduced in weight and size, and the disc brake 10 can be reduced in weight and size.
  • the caliper 15 has a plurality of cylinder bores 35 only on one side of the disk 11 in the disk axial direction, and has a cylinder bore 35 on the other side of the disk 11 in the disk axial direction.
  • the above-described configuration can also be applied to an opposed piston type caliper having a plurality of cylinder bores 35 on both sides of the disk 11 in the disk axial direction.
  • the above configuration can be applied to a disc brake that has a plurality of cylinder bores that are located on at least one side of the disc and open at one end.
  • the first aspect of the disc brake of the embodiment described above has cylinders in which pistons are respectively disposed in a plurality of cylinder bores that are located on at least one side of the disc and open at one end, and are padded by the plurality of pistons.
  • a disc brake that presses the disc against the disc.
  • the outer surface of the intermediate region between the cylinder bores at the bottom of the cylinder is flush with the outer surface of the bore bottom region at the position of the cylinder bore at the bottom of the cylinder, or is recessed from the outer surface of the bore bottom region.
  • a recess is provided, and a piping hole is formed in the intermediate region.
  • the entire bottom of the cylinder can be thinned while securing the threaded length of the piping hole. Therefore, the weight and size can be reduced.
  • a shot part is provided in the intermediate region, and a hook for preventing rotation of a brake pipe attached to the pipe hole is locked to the shot part. For this reason, it is not necessary to cut a hole or a groove for locking the anti-rotation hook, and the manufacturing cost can be reduced.
  • the third aspect is the first or second aspect, wherein the piping hole is formed to a position that is at least closer to the opening side of the cylinder bore than the inner bottom surface of the cylinder bore.
  • a communication hole penetrating the piping hole and communicating with the plurality of cylinder bores is formed. For this reason, it becomes possible to form the communication hole which makes a piping hole connect with a some cylinder bore by one, can reduce a process man-hour, and can reduce manufacturing cost.
  • a fourth aspect is any one of the first to third aspects, wherein the cylinder has a cylinder body portion that extends from the cylinder bottom portion in the disk axial direction, and the communication hole includes the communication hole, It is formed by one straight hole that opens into the cylinder body and passes through one cylinder bore among the plurality of cylinder bores and extends to the other cylinder bore. For this reason, by closing the opening with a bleeder plug, the communication path can be used as an air vent path for a disc brake, and it is not necessary to process an air vent path separately, thereby reducing processing man-hours. The manufacturing cost can be reduced.
  • the communication hole is formed so as to open to the upper side in the vertical direction of each cylinder bore.
  • the said communicating path can be used as an air vent path of a disc brake, it is not necessary to process an air vent path separately, a processing man-hour can be reduced, and manufacturing cost can be reduced.
  • the above-described disc brake can be reduced in weight and size.

Abstract

This disc brake includes a cylinder (26) having a plurality of cylinder bores (35) which are positioned on at least one side of a disc, which each have one open end, and in which respective pistons are disposed. A plurality of the pistons press a pad against the disc. An outer surface (62A) of an intermediate region (62) disposed, in a bottom part (36) of the cylinder (26), between the plurality of cylinder bores (35), is disposed on the same plane as outer surfaces (61A) of bore bottom regions (61) which are disposed, in the bottom part (36) of the cylinder (26), at the positions of the corresponding cylinder bores (35). Alternatively, the outer surface (62A) has a recessed part (65) recessed from the outer surfaces (61A) of the bore bottom regions (61). A pipe hole (68) is formed in the intermediate region (62).

Description

ディスクブレーキDisc brake
　本発明は、ディスクブレーキに関する。
　本願は、２０１６年６月２８日に、日本に出願された特願２０１６－１２７７００号に基づき優先権を主張し、その内容をここに援用する。 The present invention relates to a disc brake.
This application claims priority on June 28, 2016 based on Japanese Patent Application No. 2016-127700 filed in Japan, the contents of which are incorporated herein by reference.
　キャリパボディの作用部に２つのシリンダ孔がディスク周方向に併設され、この作用部の反ディスクロータ側のディスク周方向中央部にユニオンボス部が設けられ、このユニオンボス部にユニオン孔が設けられたディスクブレーキがある（例えば、特許文献１参照）。また、シリンダ部に２個のシリンダボアが形成され、シリンダボアの底部に位置してシリンダ部に給排口が形成されたディスクブレーキがある（例えば、特許文献２参照）。また、キャリパに２個のシリンダがディスク回転方向に並んで設けられたディスクブレーキがある（例えば、特許文献３参照）。 Two cylinder holes are provided along the circumferential direction of the disk in the working part of the caliper body, a union boss part is provided in the central part of the disk circumferential direction on the side opposite to the disk rotor of this working part, and a union hole is provided in the union boss part. There is a disc brake (see, for example, Patent Document 1). In addition, there is a disc brake in which two cylinder bores are formed in the cylinder portion, and a supply / exhaust port is formed in the cylinder portion at the bottom of the cylinder bore (see, for example, Patent Document 2). In addition, there is a disc brake in which two cylinders are arranged in the caliper side by side in the disc rotation direction (see, for example, Patent Document 3).
特開２０１５－１５２１３０号公報Japanese Patent Laid-Open No. 2015-152130 特開平１１－１０８０８９号公報JP 11-108089 A 国際公開第２０１４／０５０８１１号International Publication No. 2014/050811
　ディスクブレーキの軽量化および小型化が望まれている。 Demand for lighter and smaller disc brakes.
　本発明は、軽量化および小型化が可能となるディスクブレーキを提供する。 The present invention provides a disc brake that can be reduced in weight and size.
　本発明の第一の態様によれば、ディスクブレーキは、ディスクの少なくとも一側に位置して一端が開口する複数のシリンダボアにそれぞれピストンが配置されるシリンダを有する。このディスクブレーキは、複数の前記ピストンによりパッドをディスクに押圧する。前記シリンダの底部における前記複数のシリンダボアの間の中間領域の外面が、前記シリンダの底部における前記シリンダボアの位置のボア底部領域の外面と同一平面であり、または該ボア底部領域の外面よりも凹んだ凹部を有している。前記中間領域に配管穴が形成されている。 According to the first aspect of the present invention, the disc brake has a cylinder in which pistons are respectively disposed in a plurality of cylinder bores that are located on at least one side of the disc and open at one end. The disc brake presses the pad against the disc by the plurality of pistons. The outer surface of the intermediate region between the cylinder bores at the bottom of the cylinder is flush with the outer surface of the bore bottom region at the position of the cylinder bore at the bottom of the cylinder, or is recessed from the outer surface of the bore bottom region. Has a recess. A piping hole is formed in the intermediate region.
　本発明の第二の態様によれば、前記中間領域に射抜き部が設けられ、該射抜き部に前記配管穴に取り付けられるブレーキ配管の回り止め用フックが係止されてもよい。 According to the second aspect of the present invention, a punching portion may be provided in the intermediate region, and a hook for preventing rotation of a brake pipe attached to the pipe hole may be locked to the punching portion.
　本発明の第三の態様によれば、前記配管穴は、少なくとも前記シリンダボアの内底面よりも前記シリンダボアの開口側となる位置まで形成されていてもよい。前記シリンダには、前記配管穴を貫通して前記複数のシリンダボアと連通する連通穴が形成されていてもよい。 According to the third aspect of the present invention, the piping hole may be formed at least up to a position closer to the opening side of the cylinder bore than the inner bottom surface of the cylinder bore. The cylinder may be formed with communication holes that pass through the piping holes and communicate with the plurality of cylinder bores.
　本発明の第四の態様によれば、前記シリンダは、前記シリンダ底部からディスク軸方向に延出するシリンダ胴部を有していてもよい。前記連通穴は、前記シリンダ胴部に開口して前記複数のシリンダボアのうち、一のシリンダボアを貫通し、他のシリンダボアまで延びる一本の直線状の穴で形成されていてもよい。 According to the fourth aspect of the present invention, the cylinder may have a cylinder body portion that extends in the disk axial direction from the cylinder bottom portion. The communication hole may be formed by a single linear hole that opens to the cylinder body and passes through one cylinder bore among the plurality of cylinder bores and extends to the other cylinder bore.
　本発明の第五の態様によれば、前記連通穴は、前記各シリンダボアの鉛直方向上側に開口して形成されていてもよい。 According to the fifth aspect of the present invention, the communication hole may be formed to open to the upper side in the vertical direction of each cylinder bore.
　上記したディスクブレーキによれば、軽量化および小型化が可能となる。 The above-described disc brake can be reduced in weight and size.
本発明の第１実施形態に係るディスクブレーキを示す側断面図である。It is a sectional side view showing the disc brake concerning a 1st embodiment of the present invention. 本発明の第１実施形態に係るディスクブレーキのキャリパボディを示す背面図である。It is a rear view which shows the caliper body of the disc brake which concerns on 1st Embodiment of this invention. 本発明の第１実施形態に係るディスクブレーキのキャリパボディを示す平面図である。It is a top view which shows the caliper body of the disc brake which concerns on 1st Embodiment of this invention. 本発明の第１実施形態に係るディスクブレーキのキャリパボディを示す側面図である。It is a side view showing the caliper body of the disc brake concerning a 1st embodiment of the present invention. 本発明の第１実施形態に係るディスクブレーキのキャリパボディを示す図２のＶ－Ｖ断面図である。FIG. 5 is a cross-sectional view taken along the line VV of FIG. 2 showing the caliper body of the disc brake according to the first embodiment of the present invention. 本発明の第１実施形態に係るディスクブレーキのキャリパボディを示す図３のＶＩ－ＶＩ断面図である。FIG. 5 is a cross-sectional view taken along the line VI-VI in FIG. 3 showing the caliper body of the disc brake according to the first embodiment of the present invention. 本発明の第１実施形態に係るディスクブレーキのキャリパボディを示す図４のＶＩＩ－ＶＩＩ断面図である。FIG. 5 is a cross-sectional view taken along the line VII-VII in FIG. 4 showing the caliper body of the disc brake according to the first embodiment of the present invention. 本発明の第１実施形態に係るディスクブレーキのキャリパボディ、ブレーキ配管および配管ボルト等を示す部分平面図である。1 is a partial plan view showing a caliper body, brake piping, piping bolts, and the like of a disc brake according to a first embodiment of the present invention. 本発明の第１実施形態に係るディスクブレーキのキャリパボディ、ブレーキ配管および配管ボルト等を示す部分平断面図である。It is a partial plane sectional view showing a caliper body, brake piping, piping bolts, etc. of a disc brake concerning a 1st embodiment of the present invention. 本発明の第１実施形態に係るディスクブレーキのキャリパボディ、ブレーキ配管および配管ボルト等を示す部分側断面図である。1 is a partial side cross-sectional view showing a caliper body, brake piping, piping bolts and the like of a disc brake according to a first embodiment of the present invention. 本発明の第１実施形態に係るディスクブレーキのキャリパボディ、ブレーキ配管および配管ボルト等を示す部分背面図である。1 is a partial rear view showing a caliper body, brake piping, piping bolts and the like of a disc brake according to a first embodiment of the present invention. 本発明の第２実施形態に係るディスクブレーキのキャリパボディを示す背面図である。It is a rear view which shows the caliper body of the disc brake which concerns on 2nd Embodiment of this invention.
「第１実施形態」
　本発明の第１実施形態を図１～図１１を参照して以下に説明する。 “First Embodiment”
A first embodiment of the present invention will be described below with reference to FIGS.
　図１に、ディスクブレーキ１０を示す。このディスクブレーキ１０は、自動車等の車両用に制動力を付与する。具体的には四輪自動車の前輪制動用である。ディスクブレーキ１０は、図示略の車輪と共に回転するディスク１１の回転を止めることで車両を制動する。以下、ディスク１１の中心軸線の方向をディスク軸方向、ディスク１１の径方向をディスク径方向、ディスクの円周方向をディスク周方向と称す。 FIG. 1 shows a disc brake 10. The disc brake 10 provides a braking force for a vehicle such as an automobile. Specifically, it is for front wheel braking of a four-wheeled vehicle. The disc brake 10 brakes the vehicle by stopping the rotation of the disc 11 that rotates with a wheel (not shown). Hereinafter, the direction of the central axis of the disk 11 is referred to as a disk axial direction, the radial direction of the disk 11 is referred to as a disk radial direction, and the circumferential direction of the disk is referred to as a disk circumferential direction.
　ディスクブレーキ１０は、支持部材１２と、一対のパッド１３，１４と、キャリパ１５とを備えている。支持部材１２は、ディスク１１の外周側を跨いで配置される。支持部材１２は、車両の非回転部に固定される。一対のパッド１３，１４は、支持部材１２にディスク軸方向に移動可能となるように支持されてディスク１１の両面にそれぞれ対向配置される。キャリパ１５は、支持部材１２にディスク軸方向に移動可能となるように支持されている。キャリパ１５は、一対のパッド１３，１４を挟持してこれらをディスク１１の両面に押圧する。 The disc brake 10 includes a support member 12, a pair of pads 13 and 14, and a caliper 15. The support member 12 is disposed across the outer peripheral side of the disk 11. The support member 12 is fixed to the non-rotating part of the vehicle. The pair of pads 13 and 14 are supported by the support member 12 so as to be movable in the disk axial direction, and are arranged to face both surfaces of the disk 11, respectively. The caliper 15 is supported by the support member 12 so as to be movable in the disk axial direction. The caliper 15 sandwiches the pair of pads 13 and 14 and presses them against both sides of the disk 11.
　キャリパ１５は、キャリパボディ２０と、ピストン２１と、ピストンシール２２と、ピストンブーツ２３とを有している。 The caliper 15 has a caliper body 20, a piston 21, a piston seal 22, and a piston boot 23.
　キャリパボディ２０は、鋳造により一体成形された素材に加工を施すことにより形成される。キャリパボディ２０は、具体的にはアルミニウム合金から形成されている。なお、キャリパボディ２０を鋳鉄製とすることも可能である。キャリパボディ２０は、ディスク１１のディスク軸方向の一側に位置するシリンダ２６と、シリンダ２６のディスク径方向外側からディスク１１の外周を跨ぐように延出するブリッジ部２７と、ブリッジ部２７のシリンダ２６とは反対側からディスク径方向内方に延出してディスク１１のディスク軸方向の他側に位置する爪部２８と、シリンダ２６からディスク周方向の両側に延出する図２～図４に示す一対の腕部２９と、を有している。キャリパボディ２０は、一対の腕部２９に取り付けられた図示略のピンにおいて図１に示す支持部材１２に移動可能に支持される。 The caliper body 20 is formed by processing a material integrally formed by casting. The caliper body 20 is specifically formed from an aluminum alloy. The caliper body 20 can be made of cast iron. The caliper body 20 includes a cylinder 26 positioned on one side of the disk 11 in the disk axial direction, a bridge portion 27 extending from the outer side of the cylinder 26 in the disk radial direction so as to straddle the outer periphery of the disk 11, and a cylinder of the bridge portion 27. 2 to 4 extend from the opposite side of the disk 26 in the radial direction of the disk and are located on the other side of the disk 11 in the disk axial direction, and extend from the cylinder 26 to both sides of the disk in the circumferential direction. A pair of arms 29 shown. The caliper body 20 is movably supported by the support member 12 shown in FIG. 1 with pins (not shown) attached to the pair of arm portions 29.
　シリンダ２６には、爪部２８側に向けて一端が開口しディスク軸方向のディスク１１とは反対側に向けて凹むシリンダボア３５が形成されている。図５に示すように、シリンダ２６には、シリンダボア３５が複数設けられている。具体的には、シリンダボア３５は２カ所設けられている。これらのシリンダボア３５は、同じ形状を有する。これらのシリンダボア３５は、ディスク軸方向およびディスク径方向の位置を合わせ、ディスク周方向の位置をずらして、ディスク周方向に並んで設けられている。 The cylinder 26 is formed with a cylinder bore 35 having one end opened toward the claw 28 and recessed toward the opposite side of the disk 11 in the disk axial direction. As shown in FIG. 5, the cylinder 26 is provided with a plurality of cylinder bores 35. Specifically, two cylinder bores 35 are provided. These cylinder bores 35 have the same shape. These cylinder bores 35 are provided side by side in the disk circumferential direction by aligning the positions in the disk axial direction and the disk radial direction and shifting the position in the disk circumferential direction.
　複数のシリンダボア３５が形成されることにより、シリンダ２６は、爪部２８とは反対側に、複数のシリンダボア３５の内底面３８を含むシリンダ底部３６を有しており、シリンダ底部３６から爪部２８側に延出して複数のシリンダボア３５の壁面３９を含むシリンダ胴部３７を有している。 By forming the plurality of cylinder bores 35, the cylinder 26 has a cylinder bottom portion 36 including inner bottom surfaces 38 of the plurality of cylinder bores 35 on the side opposite to the claw portion 28, and the claw portion 28 extends from the cylinder bottom portion 36. A cylinder body portion 37 that extends to the side and includes the wall surfaces 39 of the plurality of cylinder bores 35 is provided.
　シリンダボア３５には、図１に一方を示すように、それぞれ、ピストン２１がディスク軸方向に移動可能となるように配置されている。シリンダボア３５の壁面３９は、ピストン２１の移動を案内する円筒面であるガイド内周面４１を有している。シリンダボア３５の壁面３９は、ガイド内周面４１よりもシリンダ底部３６側に、ガイド内周面４１よりも径方向外方に凹む円環状の大径溝４２を有している。大径溝４２は、溝底径が、ガイド内周面４１よりも大径となっている。大径溝４２は、シリンダボア３５の壁面３９においてシリンダ底部３６側の端部に配置されている。シリンダボア３５の壁面３９は、ガイド内周面４１のシリンダ底部３６とは反対側の中間位置に、ガイド内周面４１よりも径方向外方に凹む円環状のピストンシール溝４５を有している。ピストンシール溝４５は、その溝底径がガイド内周面４１よりも大径となっている。 As shown in FIG. 1, one of the cylinder bores 35 is disposed so that the piston 21 can move in the disk axial direction. A wall surface 39 of the cylinder bore 35 has a guide inner peripheral surface 41 that is a cylindrical surface that guides the movement of the piston 21. The wall surface 39 of the cylinder bore 35 has an annular large-diameter groove 42 that is recessed more radially outward than the guide inner peripheral surface 41 on the cylinder bottom 36 side of the guide inner peripheral surface 41. The large-diameter groove 42 has a groove bottom diameter larger than that of the guide inner peripheral surface 41. The large-diameter groove 42 is disposed at the end of the cylinder bore 35 on the cylinder bottom 36 side. The wall surface 39 of the cylinder bore 35 has an annular piston seal groove 45 that is recessed radially outward from the guide inner peripheral surface 41 at an intermediate position opposite to the cylinder bottom portion 36 of the guide inner peripheral surface 41. . The piston seal groove 45 has a groove bottom diameter larger than that of the guide inner peripheral surface 41.
　シリンダ２６には、シリンダボア３５よりも爪部２８側に、シリンダボア３５のガイド内周面４１よりも径方向外方に凹む円環状のブーツ嵌合穴４８が形成されている。ブーツ嵌合穴４８は、シリンダ２６の爪部２８側の端部位置に形成されている。ブーツ嵌合穴４８は、その内径がシリンダボア３５のガイド内周面４１よりも大径となっている。ブーツ嵌合穴４８は、その内径がシリンダボア３５のいずれの位置の内径よりも大径となっている。ブーツ嵌合穴４８の底部にシリンダボア３５の開口部５１が開口している。シリンダボア３５の壁面３９のガイド内周面４１、大径溝４２およびピストンシール溝４５は、シリンダ２６のシリンダ胴部３７に配置されている。 In the cylinder 26, an annular boot fitting hole 48 is formed on the claw portion 28 side of the cylinder bore 35, which is recessed radially outward from the guide inner peripheral surface 41 of the cylinder bore 35. The boot fitting hole 48 is formed at an end position on the claw portion 28 side of the cylinder 26. The inner diameter of the boot fitting hole 48 is larger than that of the guide inner peripheral surface 41 of the cylinder bore 35. The boot fitting hole 48 has an inner diameter larger than the inner diameter of any position of the cylinder bore 35. An opening 51 of the cylinder bore 35 is opened at the bottom of the boot fitting hole 48. The guide inner peripheral surface 41, the large diameter groove 42, and the piston seal groove 45 of the wall surface 39 of the cylinder bore 35 are disposed in the cylinder body portion 37 of the cylinder 26.
　シリンダボア３５は、大径溝４２のガイド内周面４１とは反対側に上記した内底面３８を有している。内底面３８は、大径溝４２に繋がる円環状のＲ面取り面５３と、Ｒ面取り面５３の径方向内側の内端縁部から径方向内方に広がる円環状の平坦な環状面５４と、環状面５４の径方向内側から開口部５１に突出する円環状の突出部５５とを有している。内底面３８のＲ面取り面５３、環状面５４および突出部５５は、シリンダ２６のシリンダ底部３６に設けられている。 The cylinder bore 35 has the above-described inner bottom surface 38 on the side opposite to the guide inner peripheral surface 41 of the large diameter groove 42. The inner bottom surface 38 includes an annular R-chamfered surface 53 connected to the large-diameter groove 42, an annular flat annular surface 54 extending radially inward from an inner edge of the R-chamfered surface 53 in the radial direction, An annular projecting portion 55 projecting from the radially inner side of the annular surface 54 to the opening 51 is provided. The R chamfered surface 53, the annular surface 54 and the protruding portion 55 of the inner bottom surface 38 are provided on the cylinder bottom 36 of the cylinder 26.
　大径溝４２は、キャリパボディ２０の素材の鋳造時に形成されており、鋳肌の状態となっている。ガイド内周面４１、ピストンシール溝４５およびブーツ嵌合穴４８は、キャリパボディ２０の素材に切削加工を施すことによって形成されている。 The large diameter groove 42 is formed at the time of casting the material of the caliper body 20, and is in a cast surface state. The guide inner peripheral surface 41, the piston seal groove 45, and the boot fitting hole 48 are formed by cutting the material of the caliper body 20.
　図５に示すように、シリンダ底部３６は、一方のシリンダボア３５の内底面３８をディスク軸方向に投影した範囲にあって、この内底面３８の全面とディスク径方向およびディスク周方向の位置が重なり合って一方のシリンダボア３５の底部を構成するボア底部領域６１と、他方のシリンダボア３５の内底面３８をディスク軸方向に投影した範囲にあって、この内底面３８の全面とディスク径方向およびディスク周方向の位置が重なり合って他方のシリンダボア３５の底部を構成するボア底部領域６１と、これらボア底部領域６１の間の中間領域６２とを有している。言い換えれば、中間領域６２は、シリンダ底部３６における複数のシリンダボア３５の間の領域となっている。 As shown in FIG. 5, the cylinder bottom portion 36 is in a range in which the inner bottom surface 38 of one cylinder bore 35 is projected in the disk axial direction, and the entire surface of the inner bottom surface 38 overlaps the positions in the disk radial direction and the disk circumferential direction. The bore bottom region 61 constituting the bottom of one cylinder bore 35 and the inner bottom surface 38 of the other cylinder bore 35 are in a range projected in the disk axial direction, and the entire inner bottom surface 38, the disk radial direction and the disk circumferential direction Are overlapped with each other, and a bore bottom region 61 constituting the bottom of the other cylinder bore 35 and an intermediate region 62 between these bore bottom regions 61 are provided. In other words, the intermediate region 62 is a region between the plurality of cylinder bores 35 in the cylinder bottom portion 36.
　シリンダ２６のシリンダ底部３６の爪部２８とは反対側の外底面６３は、図２，図５，図６に示すように、シリンダボア３５の中心軸線に直交して一つの平面として広がる主面部６４と、主面部６４のディスク周方向の中央に形成された主面部６４よりもディスク軸方向の爪部２８側に向けて凹む凹部６５とを有している。凹部６５は中間領域６２に設けられている。図２，図５に示すように、主面部６４は、シリンダ底部３６の一方のボア底部領域６１の外面６１Ａの全部と他方のボア底部領域６１の外面６１Ａの全部とこれらの間の中間領域６２の外面６２Ａの凹部６５を除く面部６２ａとを含んでいる。凹部６５は、中間領域６２の面部６２ａよりも凹んでいる。これにより、中間領域６２の外面６２Ａは、シリンダ底部３６のシリンダボア３５の位置のボア底部領域６１の外面６１Ａよりも凹んだ凹部６５を有している。凹部６５は、座ぐり穴である。凹部６５は、キャリパボディ２０の素材に切削加工を施すことによって形成され、その底面６６が円形の平坦面となっている。 As shown in FIGS. 2, 5, and 6, an outer bottom surface 63 of the cylinder bottom 36 opposite to the claw portion 28 of the cylinder 26 has a main surface portion 64 that spreads as a single plane perpendicular to the central axis of the cylinder bore 35. And a concave portion 65 that is recessed toward the claw portion 28 in the disc axial direction with respect to the main surface portion 64 formed at the center in the disc circumferential direction of the main surface portion 64. The recess 65 is provided in the intermediate region 62. As shown in FIGS. 2 and 5, the main surface portion 64 is composed of the entire outer surface 61 </ b> A of one bore bottom region 61 of the cylinder bottom portion 36, the entire outer surface 61 </ b> A of the other bore bottom region 61, and the intermediate region 62 therebetween. And a surface portion 62a excluding the concave portion 65 of the outer surface 62A. The recessed portion 65 is recessed from the surface portion 62 a of the intermediate region 62. Thus, the outer surface 62A of the intermediate region 62 has a recess 65 that is recessed from the outer surface 61A of the bore bottom region 61 at the position of the cylinder bore 35 of the cylinder bottom 36. The recess 65 is a counterbore. The recess 65 is formed by cutting the material of the caliper body 20, and its bottom surface 66 is a circular flat surface.
　ここで、キャリパボディ２０の素材は、巣の発生を抑制するため、シリンダ底部３６の外底面６３の全面を湯口とする金型を用いて鋳造される。キャリパボディ２０の素材は、ディスク周方向に鏡面対称の形状となっている。 Here, the material of the caliper body 20 is cast using a mold that uses the entire outer bottom surface 63 of the cylinder bottom 36 as a gate in order to suppress the formation of nests. The caliper body 20 has a mirror-symmetric shape in the disk circumferential direction.
　シリンダ底部３６におけるシリンダボア３５とシリンダボア３５との間の中間領域６２に、図５，図６に示すように、外底面６３の凹部６５からディスク軸方向の爪部２８側に向けて延びる配管穴６８が形成されている。配管穴６８は、キャリパボディ２０の素材に切削加工を施すことによって形成される。配管穴６８は、凹部６５の底面６６の中央から爪部２８側に延びている。配管穴６８は、奥側が下穴６９となっており、開口側の所定範囲にメネジ７０が形成されている。 As shown in FIGS. 5 and 6, a pipe hole 68 extending from the concave portion 65 of the outer bottom surface 63 toward the claw portion 28 in the disk axial direction in an intermediate region 62 between the cylinder bore 35 and the cylinder bore 35 in the cylinder bottom portion 36. Is formed. The piping hole 68 is formed by cutting the material of the caliper body 20. The piping hole 68 extends from the center of the bottom surface 66 of the recess 65 toward the claw portion 28. The piping hole 68 has a bottom hole 69 on the back side, and a female screw 70 is formed in a predetermined range on the opening side.
　図５に示すように、配管穴６８は、複数のシリンダボア３５と平行である。配管穴６８は、これらシリンダボア３５の中心軸線を結んだ線上に配置され、これらシリンダボア３５の間の中央位置に配置されている。配管穴６８は、ディスク周方向の位置が、複数のシリンダボア３５のいずれにも重なり合っていない。配管穴６８は、シリンダボア３５の内底面３８の突出部５５の先端面よりもシリンダボア３５の開口部５１側まで形成されている。 As shown in FIG. 5, the piping hole 68 is parallel to the plurality of cylinder bores 35. The piping hole 68 is disposed on a line connecting the central axes of the cylinder bores 35 and is disposed at a central position between the cylinder bores 35. The pipe hole 68 does not overlap with any of the plurality of cylinder bores 35 in the circumferential direction of the disk. The piping hole 68 is formed to the opening 51 side of the cylinder bore 35 from the tip surface of the protruding portion 55 of the inner bottom surface 38 of the cylinder bore 35.
　ここで、複数のシリンダボア３５の配置ピッチをＰとし、シリンダボア３５の半径をＲとし、配管穴６８の半径をＢとすると、次式の関係を満足するようにシリンダ底部３６の肉厚が設定されている。
　（Ｐ／２－Ｂ）／Ｒ≧１．３５ Here, when the arrangement pitch of the plurality of cylinder bores 35 is P, the radius of the cylinder bore 35 is R, and the radius of the piping hole 68 is B, the thickness of the cylinder bottom 36 is set so as to satisfy the relationship of the following formula. ing.
(P / 2-B) /R≧1.35
　図２に示すように、凹部６５および配管穴６８は、キャリパボディ２０のディスク周方向の中央位置に設けられている。 As shown in FIG. 2, the recess 65 and the piping hole 68 are provided at the center position in the disk circumferential direction of the caliper body 20.
　シリンダ２６のシリンダ底部３６側には、ディスク径方向外側に、シリンダ底部３６のディスク径方向の外端位置よりもディスク径方向内方に向けて凹む凹状部８１がディスク周方向の中央に形成されている。凹状部８１のディスク周方向の中央に凹状部８１のディスク径方向内側の底面８２よりもディスク径方向内方に向けて凹む凹状の射抜き部８３が形成されている。射抜き部８３は、配管穴６８とディスク軸方向の位置およびディスク周方向の位置が合っており、よって、シリンダ底部３６の中間領域６２に設けられている。
　射抜き部８３は、図３に示すように、ディスク軸方向の爪部２８とは反対側に開口している。射抜き部８３は、図５に示す各シリンダボア３５との距離が同等になっている。 On the cylinder bottom portion 36 side of the cylinder 26, a concave portion 81 is formed on the outer side in the disk radial direction so as to be recessed inward in the disk radial direction from the outer end position in the disk radial direction of the cylinder bottom portion 36. ing. At the center of the concave portion 81 in the circumferential direction of the disc, a concave punching portion 83 is formed that is recessed inward in the radial direction of the disc from the bottom surface 82 inside the radial direction of the concave portion 81. The shot-out portion 83 is aligned with the position of the pipe hole 68 in the disk axial direction and the disk circumferential direction, and is thus provided in the intermediate region 62 of the cylinder bottom 36.
As shown in FIG. 3, the punching portion 83 is opened on the side opposite to the claw portion 28 in the disk axial direction. The shot-out portion 83 has the same distance from each cylinder bore 35 shown in FIG.
　図２に示すように、シリンダ２６のシリンダ底部３６側には、ディスク径方向内側にも、シリンダ底部３６のディスク径方向の内端位置よりもディスク径方向外方に向けて凹む凹状部８５がディスク周方向の中央に形成されている。凹状部８１、射抜き部８３および凹状部８５は、鋳肌の状態であり、キャリパボディ２０が鋳造される際に金型により形成されている。少なくとも射抜き部８３は全体が鋳肌の状態となっている。 As shown in FIG. 2, on the cylinder bottom portion 36 side of the cylinder 26, a concave portion 85 that is recessed toward the outer side in the disk radial direction from the inner end position in the disk radial direction of the cylinder bottom portion 36 is also formed on the inner side in the disk radial direction. It is formed at the center in the disk circumferential direction. The concave portion 81, the punched portion 83, and the concave portion 85 are in a state of casting, and are formed by a mold when the caliper body 20 is cast. At least the punching portion 83 is entirely in a cast surface state.
　シリンダ２６は、一対の腕部２９のディスク径方向の内側に、シリンダ胴部３７からディスク周方向の両側に突出する突出部９１を有している。突出部９１は、図４に示すように、腕部２９とシリンダ胴部３７との境界近傍から突出している。 The cylinder 26 has projecting portions 91 projecting from the cylinder body portion 37 to both sides in the disk circumferential direction on the inner side of the pair of arm portions 29 in the disk radial direction. As shown in FIG. 4, the protruding portion 91 protrudes from the vicinity of the boundary between the arm portion 29 and the cylinder body portion 37.
　シリンダ２６には、図７に示すように、一本の直線状の連通穴９２が形成されている。この連通穴９２は、一方の突出部９１から、この突出部９１に近い側のシリンダボア３５を貫通し、配管穴６８の穴底側を貫通して、この突出部９１から遠い側のシリンダボア３５まで延びている。連通穴９２は、突出部９１に配置されて開口する大径穴９３と、配管穴６８を貫通して一方のシリンダボア３５および他方のシリンダボア３５と連通する小径穴９４とを有している。すなわち、連通穴９２は、シリンダ胴部３７に開口して複数のシリンダボアのうち、一のシリンダボア３５を貫通し、他のシリンダボア３５まで延びる一本の直線状の穴で形成されている。大径穴９３は、小径穴９４よりも内径が大径となっている。連通穴９２は、その中心軸線がシリンダボア３５の中心軸線に直交する平面に配置されている。小径穴９４は、各シリンダボア３５の大径溝４２の位置に開口している。連通穴９２は、ドリルにより穴開け加工して形成された後、大径穴９３にさらにねじ加工され、図示せぬブリーダプラグがねじ込まれる。したがって、車両へのディスクブレーキ１０の取付に際しては、大径穴９３が鉛直方向上方となるように取り付けられる。このため、連通穴９２は、各シリンダボア３５の鉛直方向上側に開口するように構成されており、各シリンダボア３５のエア抜きが連通穴３５により可能となっている。ディスクブレーキ１０の車両への取付位置に応じて両方の突出部９１のうちの一方から連通穴９２が形成される。大径穴９３に球状の封止部材が打ち込まれて、大径穴９３が閉塞される場合もある。 As shown in FIG. 7, a single linear communication hole 92 is formed in the cylinder 26. The communication hole 92 extends from one projecting portion 91 to the cylinder bore 35 on the side close to the projecting portion 91, passes through the bottom of the piping hole 68, and extends to the cylinder bore 35 on the far side from the projecting portion 91. It extends. The communication hole 92 has a large-diameter hole 93 that is disposed in the projecting portion 91 and opens, and a small-diameter hole 94 that passes through the piping hole 68 and communicates with one cylinder bore 35 and the other cylinder bore 35. That is, the communication hole 92 is formed by a single straight hole that opens to the cylinder body portion 37 and passes through one cylinder bore 35 and extends to the other cylinder bore 35 among the plurality of cylinder bores. The large diameter hole 93 has a larger inner diameter than the small diameter hole 94. The communication hole 92 is disposed on a plane whose central axis is perpendicular to the central axis of the cylinder bore 35. The small diameter hole 94 opens at the position of the large diameter groove 42 of each cylinder bore 35. The communication hole 92 is formed by drilling with a drill, and is further threaded into the large-diameter hole 93 to be screwed with a bleeder plug (not shown). Therefore, when attaching the disc brake 10 to the vehicle, the large-diameter hole 93 is attached so as to be vertically upward. For this reason, the communication hole 92 is configured to open to the upper side in the vertical direction of each cylinder bore 35, and air can be released from each cylinder bore 35 by the communication hole 35. A communication hole 92 is formed from one of both protrusions 91 according to the mounting position of the disc brake 10 on the vehicle. A spherical sealing member may be driven into the large-diameter hole 93 to close the large-diameter hole 93.
　図８～図１１に示すように、キャリパボディ２０には、ブレーキ配管１０２が接続される。つまり、図９，図１０に示すように、キャリパボディ２０の凹部６５の底面６６に円環状のシールワシャ１０１が当接しており、このシールワシャ１０１にブレーキ配管１０２の端部に設けられたジョイント１０３が当接している。ジョイント１０３は、図１１に示すように円環状のジョイント本体部１０５と、ジョイント本体部１０５からその径方向に延出した後、図１０に示すようにジョイント本体部１０５の軸方向に延出する回り止め用フック１０６とを有している。ジョイント１０３は、図８，図１０，図１１に示すように回り止め用フック１０６が射抜き部８３に係合した状態でジョイント本体部１０５がシールワシャ１０１に当接している。 As shown in FIG. 8 to FIG. 11, a brake pipe 102 is connected to the caliper body 20. That is, as shown in FIGS. 9 and 10, the annular seal washer 101 is in contact with the bottom surface 66 of the recess 65 of the caliper body 20, and the joint 103 provided at the end of the brake pipe 102 is connected to the seal washer 101. It is in contact. The joint 103 extends in the radial direction from the joint main body portion 105 and the joint main body portion 105 as shown in FIG. 11, and then extends in the axial direction of the joint main body portion 105 as shown in FIG. And a non-rotating hook 106. As shown in FIGS. 8, 10, and 11, the joint main body 105 is in contact with the seal washer 101 with the anti-rotation hook 106 engaged with the punching portion 83.
　また、図９，図１０に示すように、ジョイント本体部１０５のシールワシャ１０１とは反対側には円環状のシールワシャ１１０が当接している。そして、配管ボルト１１１が、その軸部１１２においてシールワシャ１１０、ジョイント本体部１０５およびシールワシャ１０１を貫通して、配管穴６８のメネジ７０に螺合されている。これにより、配管ボルト１１１の頭部１１３が、キャリパボディ２０のシリンダ２６とでシールワシャ１０１、ジョイント本体部１０５およびシールワシャ１１０を挟持し、ブレーキ配管１０２が配管穴６８に配管ボルト１１１で取り付けられる。配管ボルト１１１は、ユニオンボルトあるいはバンジョーボルトであり、通路１１４が形成された構成を有する。この通路１１４が、一方でブレーキ配管１０２内の通路に連通し、他方で配管穴６８の配管ボルト１１１よりも穴底側の下穴６９を介して連通穴９２の小径穴９４内に連通する。ジョイント１０３は、回り止め用フック１０６が射抜き部８３に係止されることによってシリンダ２６に対し配管ボルト１１１を中心に回転することが規制されている。 Further, as shown in FIGS. 9 and 10, an annular seal washer 110 abuts on the opposite side of the joint body 105 from the seal washer 101. The piping bolt 111 passes through the seal washer 110, the joint main body portion 105, and the seal washer 101 at the shaft portion 112, and is screwed into the female screw 70 of the piping hole 68. As a result, the head 113 of the piping bolt 111 sandwiches the seal washer 101, the joint main body 105 and the seal washer 110 with the cylinder 26 of the caliper body 20, and the brake piping 102 is attached to the piping hole 68 with the piping bolt 111. The piping bolt 111 is a union bolt or a banjo bolt, and has a configuration in which a passage 114 is formed. The passage 114 communicates with the passage in the brake pipe 102 on the one hand, and communicates with the inside of the small diameter hole 94 of the communication hole 92 via the lower hole 69 on the hole bottom side of the piping bolt 111 of the piping hole 68 on the other hand. The joint 103 is restricted from rotating around the piping bolt 111 with respect to the cylinder 26 by locking the rotation-preventing hook 106 to the punching portion 83.
　図１に示すように、ピストン２１は、円板状のピストン底部１２１と円筒状のピストン胴部１２２とを備えている。ピストン２１は、ピストン胴部１２２のピストン底部１２１とは反対側の端部が開口された有底筒状に形成されている。ピストン胴部１２２には、その軸方向のピストン底部１２１と反対側に、円筒面からなる外径面１２４よりも径方向内方に凹む円環状の係止溝１２５が形成されている。ピストン２１は、ピストン底部１２１がシリンダボア３５内でシリンダ底部３６側に位置するようにシリンダボア３５に収容されている。ピストン２１は、この状態で、爪部２８側の先端がシリンダボア３５よりも爪部２８側に突出している。ピストン２１には、このようにシリンダボア３５よりも突出する先端側に係止溝１２５が形成されている。 As shown in FIG. 1, the piston 21 includes a disk-shaped piston bottom 121 and a cylindrical piston body 122. The piston 21 is formed in a bottomed cylindrical shape in which an end of the piston body 122 opposite to the piston bottom 121 is opened. An annular locking groove 125 that is recessed radially inward from an outer diameter surface 124 formed of a cylindrical surface is formed in the piston body portion 122 on the side opposite to the piston bottom portion 121 in the axial direction. The piston 21 is accommodated in the cylinder bore 35 so that the piston bottom 121 is positioned on the cylinder bottom 36 side in the cylinder bore 35. In this state, the tip of the piston 21 on the claw 28 side protrudes from the cylinder bore 35 toward the claw 28. In the piston 21, a locking groove 125 is formed on the tip side protruding from the cylinder bore 35 in this way.
　ピストンシール２２は、シリンダボア３５のピストンシール溝４５に嵌合されている。このピストンシール２２の内周側にピストン２１が嵌合されている。ピストンシール２２は、シリンダ２６とピストン２１との隙間をシールすると共に、シリンダボア３５のガイド内周面４１とでピストン２１を軸方向に移動可能に支持する。 The piston seal 22 is fitted in the piston seal groove 45 of the cylinder bore 35. The piston 21 is fitted on the inner peripheral side of the piston seal 22. The piston seal 22 seals the gap between the cylinder 26 and the piston 21 and supports the piston 21 so as to be movable in the axial direction with the guide inner peripheral surface 41 of the cylinder bore 35.
　ピストンブーツ２３は、シリンダ２６のブーツ嵌合穴４８に嵌合する環状の大径嵌合部１３１と、ピストン２１の係止溝１２５に嵌合する環状の小径嵌合部１３２と、これらの間の伸縮可能な蛇腹部１３３とを有している。ピストンブーツ２３は、ピストン２１の係止溝１２５よりもシリンダボア３５側の部分のシリンダ２６から露出する外周部を覆っている。ピストンブーツ２３は、ピストン２１のシリンダ２６に対する移動に伴って、シリンダ２６およびピストン２１に対し固定されていない中間の蛇腹部１３３が伸縮する。 The piston boot 23 includes an annular large-diameter fitting portion 131 that fits into the boot fitting hole 48 of the cylinder 26, an annular small-diameter fitting portion 132 that fits into the locking groove 125 of the piston 21, and a space between them. And an expandable / contractible bellows portion 133. The piston boot 23 covers an outer peripheral portion exposed from the cylinder 26 at a portion closer to the cylinder bore 35 than the locking groove 125 of the piston 21. As the piston boot 23 moves with respect to the cylinder 26, the intermediate bellows portion 133 that is not fixed to the cylinder 26 and the piston 21 expands and contracts.
　ブレーキ液は、図９，図１０に示すブレーキ配管１０２から配管ボルト１１１の通路１１４を介して、配管穴６８の下穴６９内に導入される。すると、ブレーキ液は下穴６９内から図７に示す小径穴９４内を通って、キャリパボディ２０の両方のシリンダボア３５内に大径溝４２から図１に示す内底面３８とピストン２１との間に導入される。すると、両側のシリンダボア３５のそれぞれにおいて、ピストン２１にブレーキ圧が作用する。その結果、両方のピストン２１が、ディスク１１側に前進し、これらのピストン２１とディスク１１との間に配置されたパッド１３をディスク１１に向かって押圧する。これにより、このパッド１３が移動してディスク１１に接触する。また、この押圧の反力で、キャリパボディ２０が移動し、爪部２８が、爪部２８とディスク１１との間に配置されたパッド１４をディスク１１に向かって押圧する。これにより、このパッド１４が、ディスク１１に接触する。このようにして、キャリパ１５は、複数のピストン２１の作動により、これらピストン２１と爪部２８とで一対のパッド１３，１４を両側から挟持してディスク１１の両面に押圧する。その結果、キャリパ１５は、ディスク１１に摩擦抵抗を付与して、制動力を発生させる。 Brake fluid is introduced into the pilot hole 69 of the piping hole 68 from the brake piping 102 shown in FIGS. 9 and 10 through the passage 114 of the piping bolt 111. Then, the brake fluid passes from the inside of the pilot hole 69 to the inside of the small diameter hole 94 shown in FIG. 7 and into the cylinder bores 35 of both the caliper bodies 20 from the large diameter groove 42 between the inner bottom surface 38 and the piston 21 shown in FIG. To be introduced. Then, brake pressure acts on the piston 21 in each of the cylinder bores 35 on both sides. As a result, both pistons 21 move forward toward the disk 11 side and press the pads 13 disposed between these pistons 21 and the disk 11 toward the disk 11. As a result, the pad 13 moves and contacts the disk 11. Further, the caliper body 20 is moved by the reaction force of the pressing, and the claw portion 28 presses the pad 14 disposed between the claw portion 28 and the disk 11 toward the disk 11. As a result, the pad 14 comes into contact with the disk 11. In this manner, the caliper 15 presses the disc 11 by holding the pair of pads 13 and 14 from both sides by the piston 21 and the claw portion 28 by the operation of the plurality of pistons 21. As a result, the caliper 15 gives a frictional resistance to the disk 11 to generate a braking force.
　特許文献１に記載のディスクブレーキは、キャリパボディの作用部に２つのシリンダ孔がディスク周方向に併設され、この作用部の反ディスクロータ側のディスク周方向中央部にユニオンボス部が設けられ、このユニオンボス部にユニオン孔が設けられている。ユニオンボス部は、作用部のディスク周方向中央部に反ディスクロータ側に突出して設けられており、キャリパボディの重量を増大させてしまう。また、特許文献２に記載のディスクブレーキは、シリンダ部に２個のシリンダボアが形成され、シリンダボアの底部に位置してシリンダ部に給排口が形成されている。このディスクブレーキは、給排口がシリンダボアの底部に重なっているため、給排口への配管ボルトの螺合長さを確保するために、シリンダ部の底部に他より肉厚の厚い部分を形成する必要があり、キャリパボディの重量を増大させてしまう。特許文献３に記載のディスクブレーキは、キャリパに２個のシリンダがディスク回転方向に並んで設けられており、２個のシリンダの間に他より肉厚の厚い部分が形成されている。 In the disc brake described in Patent Document 1, two cylinder holes are provided side by side in the disk circumferential direction in the action part of the caliper body, and a union boss part is provided in the disk circumferential direction central part on the side opposite to the disk rotor of this action part. A union hole is provided in the union boss portion. The union boss part is provided at the central part in the disk circumferential direction of the action part so as to protrude to the side opposite to the disk rotor, and increases the weight of the caliper body. In addition, the disc brake described in Patent Document 2 has two cylinder bores formed in the cylinder portion, and a supply / exhaust port is formed in the cylinder portion at the bottom of the cylinder bore. In this disc brake, the supply / exhaust port overlaps the bottom of the cylinder bore. Therefore, in order to secure the screwing length of the piping bolt to the supply / exhaust port, a thicker part is formed at the bottom of the cylinder part. This increases the weight of the caliper body. In the disc brake described in Patent Document 3, two cylinders are provided in a caliper side by side in the disc rotation direction, and a thicker portion is formed between the two cylinders.
　これに対して、第１実施形態のディスクブレーキ１０は、シリンダ底部３６における複数のシリンダボア３５の間の中間領域６２に配管穴６８が形成されており、シリンダ底部３６の中間領域６２の外面６２Ａの凹部６５が、シリンダ底部３６におけるシリンダボア３５の位置のボア底部領域６１の外面６１Ａよりも凹んだ形状をなしている。これにより、配管穴６８の螺合長さを確保した上で、シリンダ底部３６の全体の薄肉化が図れる。したがって、キャリパボディ２０の軽量化および小型化が可能となり、その結果、キャリパ１５の軽量化および小型化が可能となって、ディスクブレーキ１０の軽量化および小型化が可能となり、質量およびコストを低減することができる。 On the other hand, in the disc brake 10 of the first embodiment, the piping hole 68 is formed in the intermediate region 62 between the plurality of cylinder bores 35 in the cylinder bottom portion 36, and the outer surface 62 </ b> A of the intermediate region 62 of the cylinder bottom portion 36 is formed. The recess 65 has a shape recessed from the outer surface 61A of the bore bottom region 61 at the position of the cylinder bore 35 in the cylinder bottom 36. Accordingly, the entire cylinder bottom 36 can be thinned while securing the screwing length of the piping hole 68. Accordingly, the caliper body 20 can be reduced in weight and size. As a result, the caliper 15 can be reduced in weight and size, and the disc brake 10 can be reduced in weight and size, thereby reducing mass and cost. can do.
　また、シリンダ底部３６には、ボア底部領域６１に穴を設ける必要がなく、液圧負荷時の剛性が有利となるため、シリンダ底部３６のさらなる薄肉化が図れる。 Further, it is not necessary to provide a hole in the bore bottom region 61 in the cylinder bottom portion 36, and the rigidity at the time of hydraulic load is advantageous, so that the cylinder bottom portion 36 can be further thinned.
　また、配管穴６８がキャリパボディ２０のディスク周方向の中央位置に設けられているため、配管穴６８の加工位置が車両の左右いずれに取り付けられる場合も同じとなり、加工工数を削減することができ、製造コストを低減することができる。 Further, since the piping hole 68 is provided at the center position in the disk circumferential direction of the caliper body 20, the same processing is performed when the processing position of the piping hole 68 is attached to either the left or right side of the vehicle, and the number of processing steps can be reduced. The manufacturing cost can be reduced.
　また、シリンダ底部３６の中間領域６２に射抜き部８３が設けられており、この射抜き部８３に配管穴６８に取り付けられるブレーキ配管１０２の回り止め用フック１０６が係止されるため、回り止め用フック１０６を係止するための穴や溝を切削加工により形成する必要がなくなり、製造コストを低減することができる。 Further, a punching portion 83 is provided in the intermediate region 62 of the cylinder bottom portion 36, and the anti-rotation hook 106 of the brake pipe 102 attached to the piping hole 68 is locked to the punching portion 83. It is not necessary to form a hole or groove for locking 106 by cutting, and the manufacturing cost can be reduced.
　また、配管穴６８を、シリンダボア３５の内底面３８よりもシリンダボア３５の開口部５１側まで形成しているため、配管穴６８を複数のシリンダボア３５に連通させる連通穴９２を一本で形成することが可能になり、加工工数を削減することができ、製造コストを低減することができる。 Further, since the piping hole 68 is formed from the inner bottom surface 38 of the cylinder bore 35 to the opening 51 side of the cylinder bore 35, a single communication hole 92 for communicating the piping hole 68 to the plurality of cylinder bores 35 is formed. Thus, the number of processing steps can be reduced, and the manufacturing cost can be reduced.
「第２実施形態」
　次に、第２実施形態を主に図１２に基づいて第１実施形態との相違部分を中心に説明する。なお、第１実施形態と共通する部位については、同一称呼、同一の符号で表す。 “Second Embodiment”
Next, the second embodiment will be described mainly based on FIG. 12 with a focus on the differences from the first embodiment. In addition, about the site | part which is common in 1st Embodiment, it represents with the same name and the same code | symbol.
　第２実施形態においては、シリンダ２６の一方のボア底部領域６１の外面６１Ａの全部と、シリンダ２６の他方のボア底部領域６１の外面６１Ａの全部と、シリンダ２６の中間領域６２の外面６２Ａの全部とが、シリンダ底部３６の外底面６３に含まれており、同一平面に配置されている。つまり、第２実施形態においては、第１実施形態の凹部６５が形成されていない。この場合、例えば、鋳造時に第１実施形態の凹部６５の位置に突起を設け、この突起を切削して除去することにより外面６２Ａの配管穴６８の周囲部分の平面度を確保しつつ、中間領域６２の外面６２Ａの全部を平面にする。 In the second embodiment, all of the outer surface 61A of one bore bottom region 61 of the cylinder 26, all of the outer surface 61A of the other bore bottom region 61 of the cylinder 26, and all of the outer surface 62A of the intermediate region 62 of the cylinder 26. Are included in the outer bottom surface 63 of the cylinder bottom 36 and are arranged on the same plane. That is, in the second embodiment, the recess 65 of the first embodiment is not formed. In this case, for example, a protrusion is provided at the position of the recess 65 of the first embodiment at the time of casting, and the protrusion is cut and removed, thereby securing the flatness of the peripheral portion of the pipe hole 68 of the outer surface 62A and the intermediate region. All the outer surfaces 62A of 62 are made flat.
　第２実施形態のディスクブレーキ１０は、シリンダ底部３６の中間領域６２に配管穴６８が形成されており、シリンダ底部３６の中間領域６２の外面６２Ａが、シリンダ底部３６における複数のボア底部領域６１の外面６１Ａと同一平面に配置されている。これにより、第１実施形態と同様に、配管穴６８の螺合長さを確保した上で、シリンダ底部３６の全体の薄肉化が図れる。したがって、キャリパボディ２０の軽量化および小型化が可能となり、その結果、キャリパ１５の軽量化および小型化が可能となって、ディスクブレーキ１０の軽量化および小型化が可能となる。 In the disc brake 10 according to the second embodiment, a piping hole 68 is formed in the intermediate region 62 of the cylinder bottom portion 36, and the outer surface 62 A of the intermediate region 62 of the cylinder bottom portion 36 has a plurality of bore bottom region 61 in the cylinder bottom portion 36. It is arranged in the same plane as the outer surface 61A. As a result, as in the first embodiment, the entire cylinder bottom 36 can be thinned while securing the threaded length of the piping hole 68. Therefore, the caliper body 20 can be reduced in weight and size. As a result, the caliper 15 can be reduced in weight and size, and the disc brake 10 can be reduced in weight and size.
　以上の第１，第２実施形態では、キャリパ１５がディスク１１のディスク軸方向の一側のみに複数のシリンダボア３５を有し、ディスク１１のディスク軸方向の他側にはシリンダボア３５を有していない場合を例にとり説明したが、ディスク１１のディスク軸方向の両側それぞれに複数のシリンダボア３５を有する対向ピストン型のキャリパにも上記構成を適用可能である。つまり、ディスクの少なくとも一側に位置して一端が開口する複数のシリンダボアを有しているディスクブレーキであれば上記構成を適用可能である。 In the first and second embodiments described above, the caliper 15 has a plurality of cylinder bores 35 only on one side of the disk 11 in the disk axial direction, and has a cylinder bore 35 on the other side of the disk 11 in the disk axial direction. The case where there is no disk has been described as an example, but the above-described configuration can also be applied to an opposed piston type caliper having a plurality of cylinder bores 35 on both sides of the disk 11 in the disk axial direction. In other words, the above configuration can be applied to a disc brake that has a plurality of cylinder bores that are located on at least one side of the disc and open at one end.
　以上に述べた実施形態のディスクブレーキの第１の態様は、ディスクの少なくとも一側に位置して一端が開口する複数のシリンダボアにそれぞれピストンが配置されるシリンダを有し、複数の前記ピストンによりパッドをディスクに押圧するディスクブレーキである。前記シリンダの底部における前記複数のシリンダボアの間の中間領域の外面が、前記シリンダの底部における前記シリンダボアの位置のボア底部領域の外面と同一平面であり、または該ボア底部領域の外面よりも凹んだ凹部を有し、前記中間領域に配管穴が形成されている。これにより、配管穴の螺合長さを確保した上で、シリンダの底部の全体の薄肉化が図れる。したがって、軽量化および小型化が可能となる。 The first aspect of the disc brake of the embodiment described above has cylinders in which pistons are respectively disposed in a plurality of cylinder bores that are located on at least one side of the disc and open at one end, and are padded by the plurality of pistons. A disc brake that presses the disc against the disc. The outer surface of the intermediate region between the cylinder bores at the bottom of the cylinder is flush with the outer surface of the bore bottom region at the position of the cylinder bore at the bottom of the cylinder, or is recessed from the outer surface of the bore bottom region. A recess is provided, and a piping hole is formed in the intermediate region. As a result, the entire bottom of the cylinder can be thinned while securing the threaded length of the piping hole. Therefore, the weight and size can be reduced.
　また、第２の態様は、第１の態様において、前記中間領域に射抜き部が設けられ、該射抜き部に前記配管穴に取り付けられるブレーキ配管の回り止め用フックが係止される。このため、回り止め用フックを係止するための穴や溝を切削加工する必要がなくなり、製造コストを低減することができる。 Further, in the second aspect, in the first aspect, a shot part is provided in the intermediate region, and a hook for preventing rotation of a brake pipe attached to the pipe hole is locked to the shot part. For this reason, it is not necessary to cut a hole or a groove for locking the anti-rotation hook, and the manufacturing cost can be reduced.
　また、第３の態様は、第１または第２の態様において、前記配管穴は、少なくとも前記シリンダボアの内底面よりも前記シリンダボアの開口側となる位置まで形成されており、前記シリンダには、前記配管穴を貫通して前記複数のシリンダボアと連通する連通穴が形成されている。このため、配管穴を複数のシリンダボアに連通させる連通穴を一本で形成することが可能になり、加工工数を削減することができ、製造コストを低減することができる。 Further, the third aspect is the first or second aspect, wherein the piping hole is formed to a position that is at least closer to the opening side of the cylinder bore than the inner bottom surface of the cylinder bore. A communication hole penetrating the piping hole and communicating with the plurality of cylinder bores is formed. For this reason, it becomes possible to form the communication hole which makes a piping hole connect with a some cylinder bore by one, can reduce a process man-hour, and can reduce manufacturing cost.
　また、第４の態様は、第１乃至第３のいずれかの態様において、前記シリンダは、前記シリンダ底部からディスク軸方向に延出するシリンダ胴部を有しており、前記連通穴は、前記シリンダ胴部に開口して前記複数のシリンダボアのうち、一のシリンダボアを貫通し、他のシリンダボアまで延びる一本の直線状の穴で形成される。このため、前記開口をブリーダプラグで閉塞することにより、前記連通路をディスクブレーキのエア抜き通路として使用することができ、別途エア抜き通路を加工する必要がなく、加工工数を削減することができ、製造コストを低減することができる。 Further, a fourth aspect is any one of the first to third aspects, wherein the cylinder has a cylinder body portion that extends from the cylinder bottom portion in the disk axial direction, and the communication hole includes the communication hole, It is formed by one straight hole that opens into the cylinder body and passes through one cylinder bore among the plurality of cylinder bores and extends to the other cylinder bore. For this reason, by closing the opening with a bleeder plug, the communication path can be used as an air vent path for a disc brake, and it is not necessary to process an air vent path separately, thereby reducing processing man-hours. The manufacturing cost can be reduced.
　また、第５の態様は、第４の態様において、前記連通穴は、前記各シリンダボアの鉛直方向上側に開口して形成される。このため、前記連通路をディスクブレーキのエア抜き通路として使用することができ、別途エア抜き通路を加工する必要がなく、加工工数を削減することができ、製造コストを低減することができる。 Further, in a fifth aspect according to the fourth aspect, the communication hole is formed so as to open to the upper side in the vertical direction of each cylinder bore. For this reason, the said communicating path can be used as an air vent path of a disc brake, it is not necessary to process an air vent path separately, a processing man-hour can be reduced, and manufacturing cost can be reduced.
　上記したディスクブレーキによれば、軽量化および小型化が可能となる。 The above-described disc brake can be reduced in weight and size.
　１０　　ディスクブレーキ
　１１　　ディスク
　１３，１４　　パッド
　２１　　ピストン
　２６　　シリンダ
　３５　　シリンダボア
　３６　　シリンダ底部（底部）
　３８　　内底面
　６１　　ボア底部領域
　６１Ａ　　外面
　６２　　中間領域
　６２Ａ　　外面
　６５　　凹部
　６８　　配管穴
　８３　　射抜き部
　９２　　連通穴
　１０２　　ブレーキ配管
　１０６　　回り止め用フック 10 Disc brake 11 Disc 13, 14 Pad 21 Piston 26 Cylinder 35 Cylinder bore 36 Cylinder bottom (bottom)
38 Inner bottom surface 61 Bore bottom region 61A Outer surface 62 Intermediate region 62A Outer surface 65 Recessed portion 68 Piping hole 83 Radiation portion 92 Communication hole 102 Brake piping 106 Non-rotating hook

Claims (5)

  1. 　ディスクの少なくとも一側に位置して一端が開口する複数のシリンダボアにそれぞれピストンが配置されるシリンダを有し、複数の前記ピストンによりパッドをディスクに押圧するディスクブレーキであって、
    　前記シリンダの底部における前記複数のシリンダボアの間の中間領域の外面が、前記シリンダの底部における前記シリンダボアの位置のボア底部領域の外面と同一平面であり、または該ボア底部領域の外面よりも凹んだ凹部を有し、
    　前記中間領域に配管穴が形成されている、ディスクブレーキ。     A disc brake that has a cylinder in which a piston is disposed in each of a plurality of cylinder bores that are located on at least one side of the disc and open at one end, and that presses a pad against the disc by the plurality of pistons,
    The outer surface of the intermediate region between the cylinder bores at the bottom of the cylinder is flush with the outer surface of the bore bottom region at the position of the cylinder bore at the bottom of the cylinder, or is recessed from the outer surface of the bore bottom region. Having a recess,
    A disc brake in which a piping hole is formed in the intermediate region.
  2. 　前記中間領域に射抜き部が設けられ、該射抜き部に前記配管穴に取り付けられるブレーキ配管の回り止め用フックが係止される、請求項１記載のディスクブレーキ。 The disc brake according to claim 1, wherein a punching portion is provided in the intermediate region, and a hook for preventing rotation of a brake pipe attached to the pipe hole is locked to the punching portion.
  3. 　前記配管穴は、少なくとも前記シリンダボアの内底面よりも前記シリンダボアの開口側となる位置まで形成されており、
    　前記シリンダには、前記配管穴を貫通して前記複数のシリンダボアと連通する連通穴が形成されている、請求項１または２記載のディスクブレーキ。     The piping hole is formed to a position that is at least the opening side of the cylinder bore from the inner bottom surface of the cylinder bore,
    The disc brake according to claim 1 or 2, wherein the cylinder is formed with a communication hole penetrating the piping hole and communicating with the plurality of cylinder bores.
  4. 　前記シリンダは、前記シリンダ底部からディスク軸方向に延出するシリンダ胴部を有しており、
    　前記連通穴は、前記シリンダ胴部に開口して前記複数のシリンダボアのうち、一のシリンダボアを貫通し、他のシリンダボアまで延びる一本の直線状の穴で形成される、請求項１乃至３のいずれか一項に記載のディスクブレーキ。     The cylinder has a cylinder body extending in the disk axial direction from the cylinder bottom,
    4. The communication hole according to claim 1, wherein the communication hole is formed by a single linear hole that opens into the cylinder body and passes through one cylinder bore and extends to another cylinder bore among the plurality of cylinder bores. Disc brake as described in any one.
  5. 　前記連通穴は、前記各シリンダボアの鉛直方向上側に開口して形成される、請求項４に記載のディスクブレーキ。 The disc brake according to claim 4, wherein the communication hole is formed so as to open to the upper side in the vertical direction of each cylinder bore.
PCT/JP2017/010407 2016-06-28 2017-03-15 Disc brake WO2018003198A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016-127700 2016-06-28
JP2016127700 2016-06-28

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011046247A (en) * 2009-08-26 2011-03-10 Nissin Kogyo Co Ltd Connecting structure for brake pipe
JP2015152130A (en) * 2014-02-18 2015-08-24 日信工業株式会社 Caliper body of disk brake for vehicle
JP2016512874A (en) * 2013-03-18 2016-05-09 フレニ・ブレンボ エス・ピー・エー Disc brake caliper with reduced axial dimensions

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011046247A (en) * 2009-08-26 2011-03-10 Nissin Kogyo Co Ltd Connecting structure for brake pipe
JP2016512874A (en) * 2013-03-18 2016-05-09 フレニ・ブレンボ エス・ピー・エー Disc brake caliper with reduced axial dimensions
JP2015152130A (en) * 2014-02-18 2015-08-24 日信工業株式会社 Caliper body of disk brake for vehicle

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