JP2009097637A - Caliper body for disc brakes for vehicles - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the rigidity of a caliper body by a simple structure without increasing the weight of the caliper body. <P>SOLUTION: A pair of action parts 3a, 3b having two cylinder holes 5, 6 juxtaposed in the disk circumferential direction are formed integrally with a bridge part 3c for connecting the both action parts 3a, 3b astride the outer periphery of a disk rotor 2. A ceiling opening part 3g is formed on the bridge part 3c, and a rigid member 10 is suspended on the ceiling opening part 3g in the disk axial direction. The action parts 3a, 3b are provided with inner walls 3h, 3m on the disk rotor side for connecting opening parts of the two cylinder holes 5, 6 to a disk turn-in side block 3d and a disk turn-out side block 3e; lateral ribs 3i, 3n connecting bottom walls 5a, 6a of the cylinder holes 5, 6 to the disk turn-in side block 3d and disk turn-out side block 3e; and longitudinal ribs 3k, 3p extended from intersection portions of the lateral ribs 3i, 3n with the cylinder hole bottom walls 5a, 6a toward fitting parts 3j, 3o of the ceiling opening part 3g. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a caliper body of a hydraulic vehicle disc brake used in a traveling vehicle such as an automobile or a motorcycle, and more specifically, a pair of action portions disposed with a disc rotor interposed therebetween, and these are connected to a disc rotor. The present invention relates to a monocoque-type piston-facing caliper body that is integrally formed with a bridge portion that straddles the outer periphery.

As a disc brake used in a traveling vehicle such as an automobile or a motorcycle, a plurality of pistons are arranged opposite to each other on both sides of the disc rotor with a pair of friction pads interposed therebetween, and both the acting portions are disc rotors. There is a monocoque piston-facing caliper body that is integrally connected by a bridge portion that is disposed across the outer periphery of the piston. Some of the caliper body bridges are provided with a substantially rectangular ceiling opening through which the pair of friction pads are inserted and removed, and in order to ensure the rigidity of the ceiling opening, a rigid member is provided in the ceiling opening. In order to ensure the rigidity of the caliper body, for example, it is attached (for example, refer to Patent Document 1), and the bottoms of the arranged cylinder holes are connected by ribs (for example, refer to Patent Document 2).
JP-A-9-72357 JP 2001-263394 A

  However, in the thing of the above-mentioned patent document 1, since the rigidity member was mounted | worn with the ceiling opening part, although the rigidity of a bridge | bridging part improved, the rigidity of an action part was not able to be improved. Although the thing of patent document 2 connects the bottom part of the cylinder hole arranged in parallel with the rib and aims at the improvement of the structure of an action part, there existed a possibility that the weight of a caliper body might increase.

  Therefore, an object of the present invention is to provide a caliper body for a vehicle disc brake that can improve the rigidity of the caliper body with a simple structure and without increasing the weight of the caliper body as much as possible.

  In order to achieve the above-described object, the present invention provides a pair of working parts that are opposed to each other with a disk rotor interposed therebetween, and in which a plurality of cylinder holes are arranged in the circumferential direction of the disk, and both working parts straddle the outer periphery of the disk rotor. The connecting bridge part is formed integrally, and the bridge part is provided with a ceiling opening that penetrates in and out in the radial direction of the disk. A rigid member is suspended in the ceiling opening in the disk axial direction, and the cylinders at both ends in the disk circumferential direction In the caliper body of the disc brake for a vehicle provided with a disc feed-in side block and a disc feed-out side block, respectively, on the outer side in the disc circumferential direction with respect to the hole, the action portion is an opening of a plurality of cylinder holes arranged in parallel And an inner wall on the disk rotor side that connects the disk entry side block and the disk delivery side block, and the plurality of serially arranged series A transverse rib in the circumferential direction of the disk that connects the bottom wall of the hole, the disk feed-in side block, and the disk feed-out side block, and the intersection of the horizontal rib with the cylinder hole bottom wall toward the ceiling opening And a plurality of vertical ribs each extending in the radial direction of the disk.

  Further, the rigid member can be attached to the ceiling opening by a rigid member mounting bolt fastened in the disk axial direction from one action part to the other action part, and the vertical rib is the cylinder of the horizontal rib. You may extend toward the mounting part of the said rigid member attachment bolt from the cross | intersection part with a hole bottom wall. Furthermore, it is preferable to provide a fluid passage hole for connecting hydraulic fluid chambers of a plurality of adjacent cylinder holes and supplying hydraulic fluid to the fluid chambers inside the lateral rib.

  According to the caliper body of the vehicle disk brake of the present invention, the rigidity in the disk circumferential direction and the disk radial direction can be improved with respect to each cylinder hole by the horizontal rib and the vertical rib. Further, since a space portion is formed between the inner wall on the disk rotor side, the lateral rib, and the peripheral wall of the cylinder portion, an increase in the weight of the caliper body can be suppressed as much as possible. In addition, by attaching a rigid member to the ceiling opening with a rigid member mounting bolt, it is possible to improve the rigidity of the bridge part and the action part, and if the vertical rib extends toward the mounting part of the mounting bolt The rigidity of the caliper body can be improved by the cooperation of the vertical rib, the rigid member mounting bolt and the horizontal rib. Furthermore, if a liquid passage hole is formed inside the lateral rib, it can be easily processed and the layout of the liquid passage becomes compact.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. 1 is a perspective view of a caliper body, FIG. 2 is a front view of the caliper body, FIG. 3 is a rear view of the caliper body, FIG. 4 is a plan view of the caliper body, FIG. 5 is a VV sectional view of FIG. 2 is a sectional view taken along line VI-VI, FIG. 7 is a sectional view taken along line VII-VII in FIG. 2, and FIG. 8 is a sectional view taken along line VIII-VIII in FIG. An arrow A in the figure indicates the rotational direction of the disc rotor during forward traveling of the vehicle, and the disc brake turn-in side and the outlet side used in the following description are for forward travel of the vehicle.

  The disc brake 1 according to this embodiment includes a disc rotor 2 that rotates integrally with a wheel (not shown), a caliper body 3 that is fixed to a vehicle body at one side of the disc rotor 2, and an action portion 3a of the caliper body 3. , 3b and a pair of friction pads 4, 4 disposed opposite to each other with the disk rotor 2 interposed therebetween.

  The caliper body 3 is formed integrally with the action portions 3a and 3b disposed on both sides of the disk rotor 2 and a bridge portion 3c connecting the outer periphery of the disk rotor 2 to connect the action portions 3a and 3b. Are provided with two large and small cylinder holes 5 and 6 that open to the disk rotor side, and bottomed cylindrical pistons 7 and 8 are movably inserted into the cylinder holes 5 and 6, respectively. A monocoque 4-pot piston-opposing type is defined in which a hydraulic chamber 9 is defined between the bottom walls 5a, 6a of the 5 and 6 and the pistons 7 and 8, respectively.

  In the caliper body 3, a disk insertion side block 3d is formed on the disk introduction side with respect to the cylinder hole 5, and a disk extraction side block 3e is formed on the disk extraction side with respect to the cylinder hole 6, respectively. The vehicle body mounting bolts are inserted through the vehicle body mounting holes 3f and 3f in the radial direction of the disk, which are formed through the side disk inlet side block 3d and the disk outlet side block 3e, and are fixed to the vehicle body.

  A ceiling opening 3g penetrating inward and outward in the disk radial direction is provided at the center of the bridge portion 3c, and the friction pads 4 and 4 are inserted and removed through the ceiling opening 3g. A rigid member 10 is suspended in the disk axial direction from the ceiling opening 3g, and the rigid member 10 is a pair of rigid member mounting bolts 11 fastened in the disk axial direction from one action part 3a to the other action part 3b. , 11 to the ceiling opening 3g.

  One working part 3a includes an inner wall 3h on the disk rotor side connecting the opening of the cylinder holes 5 and 6, the disk feed-in block 3d and the disk feed-out block 3e, and the bottom walls 5a, Rigid member mounting bolts 11, 11 from the intersecting portion of the lateral rib 3i in the circumferential direction of the disk connecting 6a, the disk inlet side block 3d, and the disk outlet side block 3e and the cylinder hole bottom walls 5a, 6a of the horizontal rib 3i. Vertical ribs 3k and 3k extending toward the mounting portion 3j are provided. Similarly, the other action portion 3b is also provided with an inner wall 3m on the disk rotor side that connects the opening of the cylinder holes 5 and 6, the disk inlet side block 3d and the disk outlet side block 3e, and the bottom wall of the cylinder holes 5 and 6. Rigid member mounting bolts from the intersecting portions of the lateral rib 3n in the circumferential direction of the disk connecting the 5a, 6a, the disk inlet side block 3d, and the disk outlet side block 3e and the cylinder hole bottom walls 5a, 6a of the horizontal rib 3n The vertical ribs 3p and 3p are formed toward the mounting portions 3o and 3o of the eleventh and eleventh eleven.

  One working portion 3a includes a first space portion 12 between the disk inlet side block 3d, the peripheral wall 5b of the cylinder hole 5 on the disk inlet side, the inner wall 3h, and the lateral rib 3i, and the disk outlet side block 3e. Are formed between the peripheral wall 6b of the cylinder hole 6 on the disk delivery side, the inner wall 3h, and the lateral rib 3i, and the peripheral wall 5b of the cylinder hole 5 on the disk delivery side and the disk delivery side. A union boss portion 3q is provided between the peripheral wall 6b of the cylinder hole 6, the inner wall 3h, and the lateral rib 3i.

  The other working portion 3b includes a third space portion 14 between the disk inlet side block 3d, the peripheral wall 5b of the cylinder hole 5 on the disk inlet side, the inner wall 3m, and the lateral rib 3n, and the cylinder on the disk inlet side. A fourth space 15 is formed between the peripheral wall 5b of the hole 5, the peripheral wall 6b of the cylinder hole 6 on the disk delivery side, the inner wall 3m, and the lateral rib 3n, and the cylinder hole 6 on the disk delivery side block 3e and the disk delivery side. The fifth space 16 is formed between the peripheral wall 6b, the inner wall 3m, and the lateral rib 3n.

  In addition, pad receiving step portions 3r are formed at four locations across the disc rotor 2 on the inner periphery side of the disc inlet side block 3d and the disc outlet side block 3e, respectively.

  Inside the lateral ribs 3i and 3n of the action portions 3a and 3b, liquid through holes 17 and 18 connecting the two adjacent hydraulic chambers 9 and 9 are formed penetrating in the disk circumferential direction. The communication ports 17a and 18a of the liquid passage holes 17 and 18 are provided at the disk delivery side ends of the horizontal ribs 3i and 3n, and the bleeder holes 17b and 18b communicated with the liquid communication holes 17 and 18 at the disk introduction side ends. Are provided, and bleeder screws 19 and 19 are respectively screwed into the bleeder holes 17b and 18b. The communication ports 17a and 18a are connected to each other via a liquid passage 20 disposed along the disk delivery side surface of the disk delivery side block 3e while straddling the outside of the disk rotor 2. Further, a union hole 21 communicating with the liquid passage hole 18 is formed in the union boss part 3q disposed between the cylinder holes 5 and 6 of the one action part 3a.

  The friction pads 4 and 4 are formed by sticking a lining 4a slidably contacting the side surface of the disk rotor 2 to a metal back plate 4b, and the back plate 4b passes through the ceiling opening 3g to the disk rotor 2 side. Ear pieces 4c, 4c are formed on both sides of the disc center side and are supported by the pad receiving step portions 3r, 3r, respectively, and are prevented from being detached by the rigid member 10. Yes.

  In the caliper body 3 formed as described above, at the time of braking, the hydraulic fluid pressurized by the hydraulic master cylinder by the brake operation is introduced into the union hole 21, and further, via the liquid through holes 17 and 18 and the liquid through pipe 20. To each hydraulic pressure chamber 9. The hydraulic fluid supplied to each hydraulic pressure chamber 9 pushes the pistons 7 and 8 toward the cylinder hole opening, and each piston 7 and 8 presses the friction pads 4 and 4 toward the disk rotor.

  At this time, the caliper body 3 is improved in rigidity by the horizontal ribs 3i, 3n, the vertical ribs 3k, 3p, and the rigid member 10, so that the hydraulic pressure supplied to each hydraulic chamber 9 during braking and the piston 7 8, even if the bottom walls 5 a, 6 a of the cylinder holes 5, 6 try to bulge toward the opposite disk rotor side, this bulging deformation is caused by the lateral ribs 3 i, 3 n and the plurality of vertical ribs 3 k, 3 p. Can be suppressed. Further, the reaction force from the disk rotor 2 acts to push both action portions 3a and 3b back to the anti-disk rotor direction via the hydraulic fluid in each friction pad 4 and hydraulic chamber 9, and the bridge portion 3c is centered. The deformation of both the action portions 3a and 3b to be opened in the shape of a letter C, the rigid member 10, the rigid member mounting bolts 11 and 11, the horizontal ribs 3i and 3n, and the vertical rib 3k provided in the ceiling opening 3g. 3p can be effectively suppressed. In particular, in the present embodiment, the vertical ribs 3k and 3p are formed from the intersecting portions of the horizontal ribs 3i and 3n with the cylinder hole bottom walls 5a and 6a toward the mounting portions 3o and 3o of the rigid member mounting bolts 11 and 11, respectively. Therefore, the longitudinal ribs 3k and 3p, the rigid member mounting bolts 11 and 11, and the lateral ribs 3i and 3n cooperate to effectively improve the rigidity of the caliper body 3.

  Further, since the caliper body 3 is provided with the first space portion 12, the second space portion 13, the third space portion 14, the fourth space portion 15, and the fifth space portion 16, the caliper body 3 has a light weight. Can also be achieved. Furthermore, in this embodiment, since the liquid passage holes 17 and 18 are formed in both the lateral ribs 3i and 3n, respectively, the liquid passage holes 17 and 18 can be easily formed. The layout of the liquid passage composed of 18 and the liquid passage 20 is also compact.

  The caliper body of the present invention is not limited to the monocoque 4-pot piston-facing caliper body as in the above-described embodiment, and can be applied to a 4-pot or more piston-facing caliper body. Moreover, the structure which connects the liquid passage hole formed in both the horizontal ribs is arbitrary, and is not limited to the one connected by the connecting pipe as in the above-described embodiment, and the disk inlet side block and the disk outlet side block Both liquid passages can be communicated with each other, and the position where the bleeder hole and the union hole are provided is arbitrary.

It is a perspective view of a caliper body showing an example of the present invention. It is a front view of a caliper body. It is a rear view of a caliper body. It is a top view of a caliper body similarly. It is VV sectional drawing of FIG. It is VI-VI sectional drawing of FIG. It is VII-VII sectional drawing of FIG. It is VIII-VIII sectional drawing of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Disc brake, 2 ... Disc rotor, 3 ... Caliper body, 3a, 3b ... Action part, 3c ... Bridge part, 3d ... Disc entrance side block, 3e ... Disc delivery side block, 3f ... Body mounting hole, 3g ... ceiling opening, 3h, 3m ... inner wall, 3i, 3n ... horizontal rib, 3j, 3o ... mounting part, 3k, 3p ... vertical rib, 3q ... union boss part, 3r ... pad receiving step part, 4 ... friction pad, 4a ... Lining, 4b ... Back plate, 4c ... Ear piece, 5, 6 ... Cylinder hole, 5a, 6a ... Bottom wall, 5b, 6b ... Peripheral wall, 7, 8 ... Piston, 9 ... Hydraulic chamber, 10 ... Rigid member 11 ... Rigid member mounting bolt, 12 ... 1st space part, 13 ... 2nd space part, 14 ... 3rd space part, 15 ... 4th space part, 16 ... 5th space part, 17, 18 ... Liquid through-hole , 17a, 18a ... port, 17b, 18b ... yellowtail Da hole, 19 ... bleeder screw, 20 ... liquid pipe, 21 ... Union hole

Claims (4)

A pair of action parts arranged opposite to each other across the disk rotor and provided with a plurality of cylinder holes in the disk circumferential direction, and a bridge part that connects both action parts across the outer circumference of the disk rotor are integrally formed, The bridge is provided with a ceiling opening penetrating inward and outward in the radial direction of the disk. A rigid member is suspended in the ceiling opening in the axial direction of the disk. In the caliper body of a vehicle disc brake provided with an entry side block and a disc delivery side block, the action portion includes openings of a plurality of cylinder holes arranged in parallel, the disc entry side block, and the disc rotation body. An inner wall on the disk rotor side connecting the output side block, bottom walls of the plurality of cylinder holes arranged side by side, and the disk inlet side block A plurality of lateral ribs extending in the disk radial direction from the intersecting portion of the transverse ribs of the circumferential direction of the disk connecting the rack and the disk delivery side block and the cylinder hole bottom wall of the lateral ribs toward the ceiling opening. A caliper body for a disc brake for a vehicle, characterized by comprising a vertical rib. 2. The caliper for a vehicle disc brake according to claim 1, wherein the rigid member is attached to the ceiling opening portion by a rigid member mounting bolt fastened in a disc axial direction from one acting portion to the other acting portion. body. 3. The vehicle disc brake according to claim 2, wherein the vertical rib extends from a crossing portion of the horizontal rib with the cylinder hole bottom wall toward a mounting portion of the rigid member mounting bolt. Caliper body. 4. The fluid passage hole for connecting the hydraulic chambers of a plurality of adjacent cylinder holes and supplying hydraulic fluid to the hydraulic chambers is provided inside the lateral rib. 5. The caliper body of the vehicle disc brake according to the item.

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