WO2018003198A1 - Frein à disque - Google Patents

Frein à disque 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
English (en)
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/fr

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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.

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  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
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Abstract

L'invention concerne un frein à disque comprenant un cylindre (26) ayant une pluralité d'alésages de cylindre (35) qui sont positionnés sur au moins un côté d'un disque, qui ont chacun une extrémité ouverte et dans lesquels des pistons respectifs sont disposés. Une pluralité desdits pistons pressent une plaquette contre le disque. Une surface externe (62A) d'une région intermédiaire (62) disposée, dans une partie inférieure (36) du cylindre (26), entre la pluralité d'alésages de cylindre (35), est disposée sur le même plan que les surfaces externes (61A) de zones de fond de trou (61) qui sont disposées, dans la partie inférieure (36) du cylindre (26), au niveau des positions des alésages de cylindre correspondants (35). En variante, la surface externe (62A) a une partie évidée (65) en retrait par rapport aux surfaces externes (61A) des régions de fond de trou (61). Un trou de tuyau (68) est formé dans la région intermédiaire (62).
PCT/JP2017/010407 2016-06-28 2017-03-15 Frein à disque WO2018003198A1 (fr)

Applications Claiming Priority (2)

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

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WO2018003198A1 true WO2018003198A1 (fr) 2018-01-04

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PCT/JP2017/010407 WO2018003198A1 (fr) 2016-06-28 2017-03-15 Frein à disque

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011046247A (ja) * 2009-08-26 2011-03-10 Nissin Kogyo Co Ltd ブレーキ配管の接続構造
JP2015152130A (ja) * 2014-02-18 2015-08-24 日信工業株式会社 車両用ディスクブレーキのキャリパボディ
JP2016512874A (ja) * 2013-03-18 2016-05-09 フレニ・ブレンボ エス・ピー・エー 軸方向寸法が縮小されたディスクブレーキキャリパー

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011046247A (ja) * 2009-08-26 2011-03-10 Nissin Kogyo Co Ltd ブレーキ配管の接続構造
JP2016512874A (ja) * 2013-03-18 2016-05-09 フレニ・ブレンボ エス・ピー・エー 軸方向寸法が縮小されたディスクブレーキキャリパー
JP2015152130A (ja) * 2014-02-18 2015-08-24 日信工業株式会社 車両用ディスクブレーキのキャリパボディ

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