JP5576518B2 - Caliper body for disc brakes for vehicles - Google Patents

Description

  The present invention relates to a caliper body of a monocoque piston-opposed vehicle disc brake in which a pair of action portions arranged opposite to each other with a disc rotor interposed therebetween are integrally connected by a bridge portion straddling the outer periphery of the disc rotor. The present invention relates to a structure of a caliper body having a ceiling opening in a part.

  Conventionally, in a caliper body of a monocoque structure piston-opposed type, a ceiling opening is formed in the bridge portion in order to release braking heat to the outside or to reduce the weight of the caliper body (see, for example, Patent Document 1).

JP 2002-213502 A

  However, when reducing the size of such a caliper body facing the monocoque piston, considering the heat dissipation, as much as possible to ensure the size of the ceiling opening, the rigidity of the bridge is reduced, There was a possibility of deteriorating the hot water flowability.

  Therefore, the present invention provides a caliper for a monocoque piston-opposed vehicle disc brake that can secure the rigidity and heat dissipation of the bridge portion and can reduce the size of the caliper body without deteriorating the hot water flow during casting. The purpose is to provide a body.

In order to achieve the above object, a caliper body for a vehicle disc brake according to the present invention has a pair of action portions arranged opposite to each other with a disc rotor interposed therebetween, a bridge portion on the disc delivery side and a disc entry side when the vehicle moves forward. The bridge portion at the center and the bridge portion at the center are integrally connected, and a substantially rectangular first ceiling opening is provided between the bridge portion on the disk delivery side and the bridge portion at the center. In the caliper body of the monocoque piston facing type disk brake for a vehicle, in which a substantially rectangular second ceiling opening is formed between the bridge and the bridge portion on the disk entry side , respectively , is disposed on both sides of the disk rotor. A first outer torque receiving surface that receives a braking torque on the disk delivery side from the friction pad is disposed on the disk delivery side of the pair of operating portions, and the disk rotation from the friction pad is performed. The second outer torque receiving surface for receiving the braking torque side are respectively formed in the disk rotation-in side of the pair of the working portion, two openings corners of the disk rotation exit side of the first roof opening and the second ceiling opening to form the two openings corners of the disk rotation entrance side to the respective arcuate, the disk rotation exit side of the two first disc axial surface and two openings of said disk rotation entrance side continuous to the opening corners A second disk axial surface continuous to the corner is formed, and the first disk axial surface is located closer to the center of the first ceiling opening than the first outer torque receiving surface. The surface protrudes from the second outer torque receiving surface toward the center side of the second ceiling opening, and the protruding portions are formed solid to form a reinforcing portion, and the bridge portion of the center portion 2 Ceiling opening dis A third disc axial direction surface is formed on the delivery side so as to face the second disc axial direction surface, and a pad spring locking in the disc delivery direction is provided at a central portion of the first disc axial direction surface in the disc axial direction. A groove is formed, and a locking piece on the disk supply side of the first pad spring is locked to the pad spring locking groove in the disk supply direction, and at both ends of the third disk axis direction surface in the disk axis direction, A pad spring locking groove in the disk axial direction is formed, and a locking piece on the disk delivery side of the second pad spring is locked in the pad spring locking groove in the disk axial direction. , the thickness of the disk radial direction in the reinforcing portion of the first disk axial surface, the opening corners on both sides than the central portion of the first disk axial surface is formed so as to be thick, the pair Two bolt insertion holes in the disk radial direction through which a pair of vehicle body mounting bolts are inserted are provided in one of the action portions, and each bolt insertion hole is the opening corner on the disk outlet side and the disk inlet side in one action portion. it is formed respectively in the vicinity of, also, the caliper body, that are integrally formed by casting, and further, near the disk axial direction of the pad spring groove, and, in the disk axial direction pad spring groove In addition, a union hole for introducing the hydraulic fluid may be formed on the outer side in the disk axial direction.

  According to the caliper body of the disc brake for a vehicle of the present invention, the opening corner portion of the ceiling opening portion is formed in an arc shape, and the reinforcing portion is provided on the outer torque receiving surface side of the disc axial direction surface continuous to the opening corner portion. By providing it, the thickness around the ceiling opening can be secured sufficiently, and even if the caliper body is downsized while maintaining the size of the friction pad and ceiling opening, the rigidity and heat dissipation of the caliper body And can keep.

  Also, even in the case of a radial mount type caliper body having a bolt insertion hole for a vehicle body mounting bolt in the disk radial direction of one working part, the bolt insertion hole can be positioned in the vicinity of the opening corner of the ceiling opening. Thus, the thickness between the bolt insertion hole and the ceiling opening can be ensured, and the caliper body can be downsized while maintaining the required rigidity. Further, in the case where the caliper body is integrally formed by casting, it is possible to prevent the deterioration of the flowability of the molten metal during casting as much as possible.

It is a top view of the disc brake for vehicles which shows one example of the present invention. It is II-II sectional drawing of FIG. FIG. 3 is a sectional view taken along line III-III in FIG. 2. 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.

  1 to 6 show an example of a caliper body of a vehicle disc brake according to the present invention. An arrow A indicates a rotation direction of a disc rotor that rotates integrally with a front wheel when the vehicle moves forward. The exit side and the disk entry side are those when the vehicle is moving forward.

  The vehicle disc brake 1 is a two-system hydraulic disc brake capable of braking the front wheel by any operation of the first and second brake operators. The disc rotor 2 rotates integrally with the front wheel, and the disc rotor 2 and the first friction pads 4 and 4 and the second friction pads 5 and 5 which are arranged to face each other with the disk rotor 2 interposed between the action portions 3a and 3a of the caliper body 3. And.

  The caliper body 3 is formed by casting, and a pair of action portions 3a and 3a are placed on the outer peripheral side of the disc rotor 2, and the bridge portion 3b and 3c on the disk feed-in side and the feed-in side and the bridge portion on the center portion. It is formed in a monocoque structure 6-pot piston facing type integrally connected with 3d, and the action portions 3a and 3a have a large-diameter cylinder hole 3e at the central portion in the circumferential direction of the disc, on the disc feeding side and the feeding side. Small-diameter cylinder holes 3f and 3g are formed to face each other, a small-diameter first piston 6 is accommodated in the small-diameter cylinder hole 3f on the disk delivery side, and a small-diameter second hole is accommodated in the small-diameter cylinder hole 3g on the disk introduction side. The piston 7 is accommodated in a large-diameter third piston 8 in the central large-diameter cylinder hole 3e. The first piston 6 is operated by the hydraulic pressure supplied from the first union hole 3h, and the hydraulic pipe of an interlocking brake system in which the front wheel is braked together with the rear wheel is connected to the first union hole 3h. The second piston 7 and the third piston 8 operate with the hydraulic pressure supplied from the second union hole 3i, and the second union hole 3i has a hydraulic pipe for a single brake system in which the front wheel is braked independently. Connected.

  The first friction pad 4 is disposed between the first piston 6 and the disk rotor 2, and the second friction pad 5 is disposed between the second piston 7 and the third piston 8 and the disk rotor 2. Is placed. Between the large-diameter cylinder hole 3e of each action part 3a, 3a and the small-diameter cylinder hole 3f on the disk delivery side, a torque receiving part 3j protrudes in the direction of the center of the disk. The disc feeding side surface of the first friction pad 4 and the disc feeding side surface of the second friction pad 5 are in contact with each other, and the first outer torque receiving surface is provided on the disc feeding side and the disc feeding side of the caliper body 3. 3k and a second outer torque receiving surface 3m are provided, the first outer torque receiving surface 3k has a disk feeding side surface of the first friction pad 4, and the second outer torque receiving surface 3m has a disk of the second friction pad 5. The turn-in sides contact each other. Also, between the disk outlet side and the inlet side bridge portions 3b, 3c and the central bridge portion 3d, a substantially rectangular first ceiling opening 9 is provided on the disk outlet side and the inlet side. A second ceiling opening 10 is formed.

The first ceiling opening 9 and the second ceiling opening 10 are two opening corners 9a, 9a on the disk delivery side of the first ceiling opening 9, which are both ends of the caliper body 3 in the disk rotation direction, Two opening corners 10a, 10a on the disk entry side of the second ceiling opening 10 are respectively formed in an arc shape, and further, a first disk axial surface 9b continuous with the opening corners 9a, 9a, and an opening The second disk axial direction surface 10b that is continuous with the corners 10a, 10a means that the first disk axial direction surface 9b is closer to the center of the first ceiling opening 9 than the first outer torque receiving surface 3k. The axial surface 10b protrudes more toward the center of the second ceiling opening 10 than the second outer torque receiving surface 3m, and the first outer torque receiving surface 3k side of the first disk axial surface 9b , and the second The second outer side of the disk axial direction surface 10b The receiving surface 3m side click, the reinforcing portion 9c, 10c are formed respectively.

Further, the bridge portion 3b of the disk rotation exit side, in the disk axial direction central portion of the first disk axial surface 9b, the direction of the pad spring engagement groove 3n output disk rotation is formed, further, the bridge portions of the central portion A third disk axial surface 10d is formed on the disk delivery side of the 3d second ceiling opening 10 so as to face the second disk axial surface 10b. The third disk axial direction of the second ceiling opening 10 Pad spring engaging grooves 3p and 3p in the disk axial direction are formed at both ends of the surface 10d in the disk axial direction.

  Further, mounting boss portions 3q and 3q in the disk radial direction are formed on the disk delivery side and the disk delivery side of one working portion 3a arranged outside the vehicle body, and each mounting boss portion 3q has a radial direction in the disk radial direction. Bolt insertion holes 3r are respectively formed. Also, the disk insertion side bolt insertion hole 3r is in the vicinity of the opening corner 9a and closer to the disk extraction side than the opening corner 9a, and the disk insertion side bolt insertion hole 3r is formed in the opening corner. The caliper body is screwed into a caliper mounting portion provided on the vehicle body side in the vicinity of the portion 10a and positioned on the disk insertion side with respect to the opening corner portion 10a and inserted into the bolt insertion holes 3r. 3 is attached to the vehicle body.

  The first friction pad 4 is formed in a size corresponding to the first piston 6 and includes a lining 4a that is slidably in contact with the side surface of the disk rotor 2, and a metal back plate 4b on which the lining 4a is adhered. . A hanging piece 4c extends in the upper center of the back plate 4b, and the first hanger pin 11 is inserted through the hanging piece 4c. The first hanger pin 11 is installed in both the action portions 3a and 3a through the first ceiling opening 9 in the disk axial direction, and the first friction pad 4 is inserted through the first hanger pin 11 into each hanging piece 4c. The disk rotor 2 is suspended so as to be movable in the disk axial direction. A first pad spring 12 is provided on the outer side in the disk radial direction of each first friction pad 4 so that the locking piece 12a is locked in the pad spring locking groove 3n.

  The second friction pad 5 is formed in a size corresponding to two of the small-diameter second piston 7 and the large-diameter third piston 8, and is in sliding contact with the side surface of the disk rotor 2, and the second piston 7 and the third piston. 8 includes two linings 5a and 5b provided on the front surface of the metal 8, and a single metal back plate 5c to which the linings 5a and 5b are attached. A hanging piece 5d extends in the upper center of the back plate 5c, and the second hanger pin 13 is inserted through the hanging piece 5d. The second hanger pin 13 is installed in the direction of the disk axis through the second ceiling opening 10 on both action portions 3a and 3a, and the second friction pads 5 and 5 are connected to the suspension pieces 5d and 5d by the second hanger. The pin 13 is inserted and suspended on both sides of the disk rotor 2 so as to be movable in the disk axial direction. Further, a second pad spring 14 is provided on the outer side of each second friction pad 5 in the disk rotor radial direction so that the locking piece 14a is locked to the pad spring locking grooves 3p, 3p.

  In this embodiment, as described above, the opening corners 9a, 9a, 10a, 10a of the first ceiling opening 9 and the second ceiling opening 10 are formed in an arc shape, and the disk axial direction surfaces 9b, 10b are formed. By providing the reinforcing portions 9c and 10c on the outer torque receiving surface side, the strength of the first ceiling opening 9 and the second ceiling opening 10 can be sufficiently secured, and the friction pads 4, 5 and the ceiling opening Even if the caliper body 3 is downsized while maintaining the size of 9, 10, the caliper body 3 can maintain the rigidity and heat dissipation, and can prevent the deterioration of the hot-water flow during casting as much as possible. it can. Furthermore, by positioning the bolt insertion holes 3r, 3r in the vicinity of the opening corners 9a, 10a, it is possible to secure a wall thickness between the bolt insertion holes 3r, 3r and the ceiling openings 9, 10 and necessary. The caliper body can be downsized while maintaining high rigidity.

  The present invention is not limited to a 6-pot opposed caliper body as in the above-described embodiment, but can be applied to a 2-pot or 4-pot opposed caliper body, and a caliper having a single ceiling opening. It can also be applied to the body. Further, the present invention is not limited to the two-system type, and can be applied to any type of disc brake having a monocoque piston facing caliper body. Further, the friction pad is not limited to the split type, and may be a one provided with a pair of friction pads. Further, the caliper body is not limited to being integrally formed by casting, but may be integrally formed by cutting.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle disc brake, 2 ... Disc rotor, 3 ... Caliper body, 3a ... Action part, 3b, 3c, 3d ... Bridge part, 3e ... Large diameter cylinder hole, 3f, 3g ... Small diameter cylinder hole, 3h ... 1st Union hole, 3i ... second union hole, 3j ... torque receiving portion, 3k ... first outer torque receiving surface, 3m ... second outer torque receiving surface, 3n, 3p ... pad spring locking groove, 3q ... mounting boss portion, 3r ... bolt insertion hole, 4 ... first friction pad, 5 ... second friction pad, 4a, 5a, 5b ... lining, 4b, 5c ... back plate, 4c, 5d ... hanging piece, 6 ... first piston, 7 2nd piston, 8 ... 3rd piston, 9 ... 1st ceiling opening, 9a ... Opening corner, 9b ... 1st disk axial direction surface, 9c ... Reinforcement part, 10 ... 2nd ceiling opening, 10a ... Opening Corner, 10b ... second disc axial plane, 0c ... reinforcing portion, 10d ... third disk axial surface, 11 ... first hanger pin 12 ... first pad spring, 13 ... second hanger pin 14 ... second pad spring

Claims (5)

A pair of action portions arranged opposite to each other with the disc rotor interposed therebetween are integrally connected by a bridge portion on the disc delivery side, a bridge portion on the disc introduction side, and a bridge portion on the center portion when the vehicle moves forward. A substantially rectangular first ceiling opening is formed between the bridge portion on the delivery side and the bridge portion on the center portion, and a second rectangular ceiling opening is formed between the bridge portion on the center portion and the bridge portion on the disk introduction side. In the caliper body of the disc brake for vehicle of the monocoque structure piston facing type formed respectively ,
A first outer torque receiving surface that receives a braking torque on the disk delivery side from a friction pad disposed on both sides of the disk rotor is disposed on the disk delivery side of the pair of working parts, and a disk delivery side from the friction pad. A second outer torque receiving surface for receiving the braking torque of the pair of acting portions on the disk entry side,
To form the two openings corners of the disk rotation entrance side of the two opening corner portion and the second ceiling opening of the disk rotation exit side of the first ceiling opening each arcuate, 2 of the disk rotation exit side one of the first disk axial surface continuous with the opening corners and second disk axial surface that is continuous with two openings corners of the disk rotation entrance side is formed respectively,
The first disk axial direction surface is closer to the center of the first ceiling opening than the first outer torque receiving surface, and the second disk axial direction surface is more than the second outer torque receiving surface to the second ceiling opening. Projecting to the center side of each part, forming these projecting parts solidly as a reinforcing part,
Forming a third disk axial surface opposite to the second disk axial surface on the disk delivery side of the second ceiling opening of the central bridge portion;
A pad spring engaging groove in the disk unwinding direction is formed in the central portion of the disk axial direction of the first disk axial direction surface, and the disk unwinding side of the first pad spring is formed in the pad spring engaging groove in the disk unwinding direction. The locking piece of
A disk-axis-direction pad spring locking groove is formed at both ends of the third disk-axis-direction surface in the disk-axis direction, and the disk-axis-side pad spring locking groove is formed on the disk delivery side of the second pad spring. A caliper body for a disc brake for a vehicle , wherein each of the locking pieces is locked . Claims, characterized in that the thickness of the disk radial direction in the first the reinforcing portion of the disk axial surface, the opening corners on both sides than the central portion of the first disk axial surface is formed to be thicker The caliper body of the disk brake for vehicles according to 1. Two bolt insertion holes in the radial direction of the disk through which the pair of vehicle body mounting bolts are inserted are provided in one of the pair of action parts, and each bolt insertion hole is provided on the disk feeding side and the disk feeding side of the one action part. 3. A caliper body for a vehicle disc brake according to claim 1, wherein the caliper body is formed in the vicinity of an opening corner. 4. The caliper body of a vehicle disc brake according to claim 1, wherein the caliper body is integrally formed by casting. 2. A working fluid introducing union hole is formed in the vicinity of the pad spring groove in the disk axial direction and on the outer side in the disk axial direction than the pad spring groove in the disk axial direction. 4. A caliper body for a vehicle disc brake according to any one of 4 above.

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