JP4647630B2 - Disc brake - Google Patents

Description

  The present invention relates to a disc brake suitable for use in a vehicle or the like.

In recent years, road wheels for four-wheeled vehicles, such as spoke types, having a relatively large opening have become widespread. Therefore, the disc brake stored in the road wheel can be visually recognized from the outside of the vehicle. Therefore, like a two-wheeled vehicle, a four-wheeled vehicle has come to attach importance to the appearance of a caliper in addition to braking performance. As a solution, a caliper with a decorative plate is known (for example, see Patent Document 1).
German Patent Invention No. 4101514

  By the way, in the disc brake of the above-mentioned patent document 1, when the travel distance becomes long, the decorative plate attached to the caliper may be displaced due to vibration or impact during travel or may be rattled over time. There was a problem of falling off the caliper and damaging the wheel. In addition, the decorative board is composed of a separate part from the caliper, and there is a problem in that the manufacturing cost increases.

  The present invention has been made in view of the above circumstances, and provides a disc brake that can improve the appearance and improve the performance without cost.

  In order to solve the above-described problems, the invention described in claim 1 is a receiver that receives a braking torque of a pad by supporting a pair of pads disposed on both sides of the disk so as to be slidable in the disk axial direction. In a disc brake comprising a carrier having a support portion, a caliper that is slidably supported by the carrier and presses the pad, and a caliper that is provided opposite to the piston and presses the pad. A recess for processing a cylinder bore into which the piston is inserted is formed in the claw portion of the caliper, and an outer beam is integrally formed on the carrier, and the outer beam covers the recess. It is characterized by being formed.

  According to the second aspect of the present invention, the receiving portion of the carrier is provided with a fitting portion that engages with the pad in the circumferential direction of the disc, and the outer beam is connected to the shaft of the disc from the receiving portion. It comprises a taper portion extending in the direction and a linear portion connecting the taper portions, and a flat portion parallel to the disk side surface is formed in the middle of the taper portion.

  According to the first aspect of the present invention, since the outer beam is formed integrally with the carrier, it is possible to improve performance without causing positional displacement, rattling, or falling out of the caliper. effective. Further, since the outer beam is not a separate part, there is an effect that can be realized without cost. Furthermore, since the outer beam covers the recess part entirely, the internal structure of the disc brake cannot be visually recognized from the outside of the vehicle, and the appearance can be improved.

  According to the second aspect of the present invention, when the fitting portion is processed in the carrier, the fitting portion can be processed by a vertical shaving machine (slotter) using the flat surface portion. Even if the outer beam that covers the entire recess portion is formed, the processing can be facilitated.

Next, an embodiment of the present invention will be described with reference to FIGS.
As shown in FIGS. 1 to 4, the disc brake 10 slides with a metal carrier 12 fixed to a non-rotating portion of the vehicle, and disposed on both sides of the carrier 12 with a disc 13 interposed therebetween. A pair of pads 14 and 15 that are freely supported, and a caliper 17 that is slidably supported by the carrier 12 along the axial direction of the disk 13 and presses the disks 13 from both outsides. It is configured.

  The pad 14 arranged on the outside of the vehicle is composed of a back metal 18 and a friction material 19 fixed to the back metal 18, and the pad 15 arranged on the inside of the vehicle is fixed to the back metal 20 and the back metal 20. It is comprised with the friction material 21. FIG.

  The caliper 17 includes a cylinder part 23 that is disposed opposite to the disk 13 of the pad 15, a disk path part 24 that extends from one side of the cylinder part 23 across the outer periphery of the disk 13, and a disk path part The claw portion 25 extends from the opposite side to the cylinder portion 23 of the 24 so as to face the opposite side to the disk 13 of the pad 14. Further, extending portions 27 are formed on both sides of the cylinder portion 23 so as to extend in opposite directions.

  Furthermore, the caliper 17 has a bottomed cylindrical shape, and has a piston 30 that is slidably fitted into the bore 29 of the cylinder portion 23 with the opening 28 side facing the pad 15.

  Then, at the position facing the piston 30 (bore 29) in the claw portion 25, as shown by a dotted line in FIG. 3, a recess portion 44 made of a notch having an outer diameter shape substantially equal to the piston 30 is formed. ing. The recess 44 is formed to insert a processing tool when the bore 29 is processed or when the groove 45 for providing the piston seal 42 on the inner surface of the bore 29 is formed by processing.

  An attachment hole (not shown) penetrating along the axial direction of the bore 29 is formed at the distal end side of both the extended portions 27 of the caliper 17. Further, pins 31, 31 are fixed to the extending portions 27 by bolts 32, 32 inserted into the mounting holes so as to extend in the direction of the claw portions 25, respectively. Then, these pins 31 are slidably fitted into guide holes (not shown) of the carrier 12 so that the caliper 17 is slidably supported by the carrier 12.

  As shown in FIGS. 5 and 6, the carrier 12 is an integrally molded product, and the bridge portion 16 disposed on the radially outer side of the disk 13 so as to be positioned at both ends in the circumferential direction of the disk 13, and the bridge An inwardly extending portion 35 that once extends inward in the radial direction of the disc 13 on one side (inside the vehicle) of the disc 13 in the axial direction of the disc 13 from the portion 16 and the inwardly extending portions 35 extend. The connecting portion 36 to be connected on the leading end side, and the inner side in the radial direction of the disc 13 on the opposite side (vehicle outer side) of the disc 13 in the disc axial direction from the bridge portion 16, and the inner side in the radial direction of the disc 13, respectively. An inwardly extending portion (tapered portion) 37 that extends obliquely so as to be positioned on the outer side in the axial direction and these inwardly extending portions 37 are coupled to each other, Perpendicular to, and a connecting portion 38 extending in the circumferential direction of the disk 13.

  Here, the inner extending portion 37 and the connecting portion 38 constitute an outer beam 40. That is, the disk 13 is disposed between the inwardly extending portion 35 and the inwardly extending portion 37, and the inwardly extending portions 35, 37 are connected to each other by the bridge portion 16 beyond the radially outer side of the disk 13. Has been.

  Further, the pads 14 and 15 are slidably supported in the axial direction of the disk 13 at positions inward of the inwardly extending portions 35 and 37 in the bridge portion 16 to brake the pads 14 and 15 generated during braking. A pad guide part (receiving part) 41 for receiving torque is provided, and each pad guide part 41 has a concave part (fitting part) 41 a recessed in the circumferential direction of the disk 13 in the axial direction of the disk 13. The pad guide portions 41 are arranged to extend so as to face each other and be spaced apart in the circumferential direction of the disk 13.

  Here, the shape of the outer side of the disk 13 in the connecting portion 38 of the outer beam 40 is processed so as to be substantially the same as the outer diameter of the disk 13 disposed on the inner side. That is, when the disc brake 1 is viewed from the axial direction side of the disc 13 outside the vehicle, the outer beam 40 is formed so as to cover the claw portion 25 and the recess portion 44 of the caliper 17 (see FIG. 3).

  Further, inwardly extending portions 37 formed on both sides of the connecting portion 38 of the outer beam 40 are used for placing the carrier 12 on the processing table of the machine tool when the carrier 12 is processed on the outer surface thereof. A processing recess 47 is formed. Further, the bottom surface (planar portion) 48 of the processing recess 47 is formed to be parallel to the radial direction of the disk 13.

Next, the operation of the disc brake 1 will be described.
The caliper 17 is opposed to the disk 13 of the pad 15 in a state where the piston 30 fitted in the bore 29 of the cylinder portion 23 is aligned with the axial direction of the disk 13 while being supported by the carrier 12 as described above. The disc path portion 24 extends from one side of the cylinder portion 23 so as to straddle the outer peripheral portion of the disc 13, and the claw portion 25 is extended to the cylinder portion 23 of the disc path portion 24. On the opposite side, the pad 14 is opposed to the disk 13 on the opposite side.

  As a result, when the piston 30 protrudes in the direction of the claw portion 25 with the brake fluid pressure, the pads 14 and 15 are sandwiched from both sides of the disc 13 by the piston 30 and the claw portion 25, and the pads 14 and 15 are 13 is contacted. At the same time, the caliper 17 appropriately contacts the pads 14 and 15 with the disk 13 with respect to the carrier 12 while the caliper 17 slides both pins 31 in the corresponding guide holes by the reaction force caused by the contact of the pads 14 and 15 with the disk 13. Move to the desired position. The vehicle can be braked by pressing the disk 13 with the pads 14 and 15.

Next, a method for processing the carrier 12 of the disc brake 1 will be described.
In order to form the carrier 12 having the outer beam 40 that covers the claw portion 25 and the recess portion 44 of the caliper 17, as a method of processing the pad guide portion 41, first, as shown in FIG. The pad guide portion 41 is processed with the processing tool 49. At this time, the processing tool 49 is moved to a position where it does not interfere with the outer beam 40 and stopped, and the processing tool 49 is removed from the carrier 12.

  Next, the carrier 12 can be processed by cutting the remaining portion 51 that could not be processed by the processing tool 49 of the milling machine with a sharpening machine (slotter). Even if the axial distance from the processing part of the bad guide part 41 to the inner end surface of the outer beam 40 is short, the processing tool for the sharpening machine can be used as long as there is a gap for discharging chips that are scraped off by the vertical cutting machine. The portion 51 left uncut by the milling machine can be machined by this sharpening machine.

  In other words, in the past, the carrier 12 was processed and formed only by processing with a broaching machine. After milling in the first step, the remaining processing portion 51 is processed with a sharpening machine in the second step. The outer beam 40 of the carrier 12 can be shaped to cover the claw portion 25 and the recess portion 44.

  Here, when machining with a sharpening machine, it is necessary to place the carrier 12 so that the outer beam 40 of the carrier 12 is positioned vertically downward. At this time, the bottom surface (planar portion) 48 of the machining recess 47 is provided. Can be processed accurately by placing the substrate in contact with the horizontal surface of the processing table. In addition, the outer surface of the connecting portion 38 of the outer beam 40 (the surface on the outer side in the axial direction of the disk 13) is formed to be parallel to the radial direction of the disk 13, and the outer beam is processed during the machining by the above-described vertical machine. You may comprise so that it may mount and process the 40 connection part 38 surface so that it may contact | abut to the horizontal surface of a processing stand.

Next, a method for attaching the pad 14 to the carrier 12 will be described.
In order to attach the pad 14 to the carrier 12, first, the pad 14 is inserted between the outer beam 40 of the carrier 12 and the pad guide portion 41, and the protrusion 52 formed on the back metal 18 of the pad 14 is inserted into the recess 41 a of the pad guide portion 41. After the pad is fitted, the pad 14 can be attached by sliding it to the disk 13 side.

Here, another aspect of the pad 14 will be described.
As shown in FIGS. 8 to 11, the pad 114 includes a back metal 118 and a friction material 19. Here, a protrusion 111 is formed at a substantially central portion of the pad 114 outside the disk 13 in the radial direction of the back metal 118.
With this configuration, the pad 114 can be smoothly attached to the carrier 12 without the outer beam 40 and the like getting in the way.

Further, as shown in FIGS. 12 to 15, the pad 214 includes a back metal 218 and a friction material 19. Here, a guide portion 211 is formed at a substantially central portion of the pad 214 outside the disk 13 in the back metal 218 in the radial direction. The guide portion 211 is formed by bending about 90 degrees toward the disk 13 at the top thereof.
With this configuration, the pad 214 can be smoothly attached to the carrier 12 without the outer beam 40 and the like being in the way, and the guide portion 211 is bent in the direction in which the pad 214 is attached. be able to.

  According to this embodiment, a pair of pads 14 and 15 arranged on both sides of the disk 13 are supported so as to be slidable in the axial direction of the disk 13, and a pad guide portion that receives the braking torque of the pads 14 and 15 ( A carrier 12 having a receiving portion 41, a piston 30 that is slidably supported by the carrier 12 and presses the pads 14 and 15, and a caliper 17 that has a claw portion 25 provided to face the piston 30. In the disc brake 10, a recess portion 44 for processing the bore 29 into which the piston 30 is inserted is formed in the claw portion 25 of the caliper 17, and the outer beam 40 is integrally formed on the carrier 12. Since the recess portion 44 and the claw portion 25 are formed so as to cover the entire surface, positional displacement, rattling, and caliper 12 Prevents the falling off, it is possible to improve the performance, it is possible to enhance the driving safety.

  Further, since the outer beam 40 is not a separate part, it can be realized without cost. In other words, as in the case of using a conventional decorative board, there is no need to manufacture the decorative board as a separate part, and to assemble the decorative board after processing to fix it to the carrier 12 or the caliper 17. It is possible to eliminate the addition of costs, the increase in processing man-hours, and the increase in assembly man-hours, which can be realized at low cost.

  In addition, although the man-hour increases because the machining process of the pad guide part 41 of the carrier 12 uses a milling machine and a sharpening machine, the remaining machining area is machined by the milling machine within the entire machining time of the carrier 12. Therefore, there is no influence on the manufacturing cost.

Further, since the outer beam 40 covers the recess 44 and the claw 25 over the entire surface, even if brake dust or earth and sand adhere to the caliper 17 or the pads 14 and 15, the internal structure of the disc brake 10 can be seen from the outside of the vehicle. It becomes impossible to visually recognize and the appearance of the appearance can be improved.
In the present embodiment, the recess 44 is entirely covered with the outer beam 40. However, the present invention is not limited to this, as long as the outer beam 40 covers the outer side in the disk radial direction from the center of the bore 29 in the recess 44. There is no loss of appearance.

  The outer beam 40 includes an inwardly extending portion 37 that extends in the axial direction of the disk 13 from the bridge portion 16 and a connecting portion 38 that connects the inwardly extending portions 37, and the inwardly extending portion 37. Since the processing recess 47 is formed in the middle and the bottom surface 48 of the processing recess 47 is formed so as to be parallel to the side surface of the disk 13, the bottom surface is formed when the recess 41 a of the pad guide portion 41 is processed in the carrier 12. The recess 41a can be machined by a sharpening machine (slotter) using the 48, and even if the outer beam 40 that covers the recess 44 and the claw 25 is formed on the carrier 12, the machining can be easily performed. can do.

  Further, in the conventional processing method, the outer beam of the carrier 12 has to be designed to be arcuate and thin, and therefore, in particular for mass production of castings, trial manufacture was carried out many times to form the part, Although considerable man-hours have been spent, the outer beam 40 can be set much thicker than the conventional product by processing the carrier 12 using the milling machine and the sharpening machine as described above. A stable casting can be produced with a small number of man-hours.

  Further, in the conventional thin bow-shaped outer beam, the vibration of the outer beam at the time of occurrence of the brake squeal becomes large and the brake squeal is liable to occur. The vibration mode can be kept low, making it difficult to generate brake noise.

  The technical scope of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, a specific configuration such as the shape of each member constituting the disc brake can be appropriately changed without being limited to the above embodiment.

It is a top view of the disc brake in the embodiment of the present invention. It is a front view of a disc brake in an embodiment of the present invention. 1 is a front view of a disc brake according to an embodiment of the present invention, and is a partially transparent illustration. It is sectional drawing which follows the AA line of FIG. It is a top view of the carrier in the embodiment of the present invention. It is explanatory drawing which partially saw in the front view of the carrier in embodiment of this invention. It is explanatory drawing which shows the processing method of the carrier in embodiment of this invention. It is a front view which shows another aspect of the pad in embodiment of this invention. It is a rear view which shows another aspect of the pad in embodiment of this invention. It is a side view which shows another aspect of the pad in embodiment of this invention. It is sectional drawing of the disc brake at the time of attaching the pad of another aspect in embodiment of this invention. It is a front view which shows another aspect of the pad in embodiment of this invention. It is a rear view which shows another aspect of the pad in embodiment of this invention. It is a side view which shows another aspect of the pad in embodiment of this invention. It is sectional drawing of the disc brake at the time of attaching the pad of another aspect in embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Disc brake 12 ... Carrier 13 ... Disc 14, 15 ... Pad 16 ... Bridge part 17 ... Caliper 25 ... Claw part 30 ... Piston 29 ... Bore (cylinder bore) 37 ... Inward extension part (taper part) 38 ... Connection part (Linear part) 40 ... Outer beam 41 ... Pad guide part (receiving part) 44 ... Recess part 48 ... Bottom face (plane part)

Claims (2)

A carrier having a receiving part for receiving a braking torque of the pad by supporting a pair of pads arranged on both sides of the disk slidably in the disk axial direction;
In a disc brake including a piston that is slidably supported by the carrier and presses the pad, and a caliper that is provided facing the piston and has a claw portion that presses the pad.
A recess for machining a cylinder bore into which the piston is inserted is formed in the claw portion of the caliper,
An outer beam is integrally formed on the carrier, and the outer beam is formed so as to cover the recess portion. The receiving portion of the carrier is provided with a fitting portion that fits unevenness in the disk circumferential direction with the pad,
The outer beam is composed of a tapered portion extending from the receiving portion in the axial direction of the disc and a linear portion connecting the tapered portions, and a flat portion parallel to the side surface of the disc is formed in the middle of the tapered portion. The disc brake according to claim 1, wherein the disc brake is provided.

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