JP2020034043A - Disc brake - Google Patents

Abstract

To provide a disc brake capable of reducing vibrations of a design plate.SOLUTION: A caliper 5 has a cylinder 7 in which a piston 13 is inserted on an inner side, and a claw portion 12 on an outer side. An inner pad 14 is pressed on a disc D from an inner side of the caliper 5 by a piston 13, and an outer pad 15 is pressed on the disc D from an outer side of the caliper 5 by the claw portion 12. The design plate 18 covers an outer side of the claw portion 12 of the caliper 5. The caliper 5 is formed with design plate supporting engaging grooves 16 and 17. On the design plate 18, engaging claws 22 and 23 respectively engaging with the design plate supporting engaging grooves 16 and 17 of the caliper 5 are provided. Then, the design plate 18 is supported with respect to the caliper 5 by engaging the engaging claws 22 and 23 with the design plate supporting engaging grooves 16 and 17 of the caliper 5.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a disc brake for applying a braking force to a vehicle such as an automobile.

  In general, a disc brake provided on a vehicle such as an automobile is disposed across the outer circumference of a disc that rotates with wheels, a caliper having a cylinder into which a piston is inserted on the inner side, and having a claw portion on the outer side, And a support member (carrier) mounted on a non-rotating portion of the vehicle for supporting the caliper movably in the axial direction of the disk. Patent Document 1 discloses a disc brake having an improved appearance by covering the outer side of a claw portion of a caliper body (caliper) with a decorative plate (design plate) fixed to a caliper bracket (support member) with mounting bolts. An apparatus is described.

JP 2010-91022 A

  According to the related art, since the decorative plate is fixed to the caliper bracket with the mounting bolts, there is a possibility that adverse effects due to vibration of the decorative plate, such as an increase in chattering noise and a decrease in durability, may occur. In addition, since the decorative plate is fixed to the caliper bracket, changes in the natural frequency (eigenvalue) may reduce brake squeal performance and productivity, and may not be able to maintain desired performance.

  An object of the present invention is to provide a disc brake capable of reducing vibration of a design plate.

  The present invention provides a caliper having a cylinder in which a piston is inserted on the inner side and a claw portion on the outer side, the caliper having a cylinder on which the piston is inserted, and the piston from the inner side of the caliper. An inner-side friction pad pressed against the disc, an outer-side friction pad pressed against the disc by the claw portion from the outer side of the caliper, and a design plate covering the outer side of the claw portion of the caliper. In the disk brake provided, the caliper is provided with a design plate support engagement groove, and the design plate is provided with an engagement claw that engages with the design plate support engagement groove. The design plate is supported by the caliper by engaging the engaging claw with the design plate supporting engagement groove of the caliper.

  ADVANTAGE OF THE INVENTION The disk brake of this invention can reduce the vibration of a design board.

FIG. 2 is a perspective view showing the disc brake according to the first embodiment. FIG. 2 is a plan view of the disc brake in FIG. 1 as viewed from above. FIG. 3 is a cross-sectional view of the disc brake in FIG. 1 as seen from the direction of arrows III-III. FIG. 4 is a cross-sectional view of the disc brake in FIG. 1 as viewed from a direction indicated by arrows IV-IV in FIG. 2. FIG. 5 is a cross-sectional view of the disc brake in FIG. 1 as viewed from a direction indicated by arrows VV in FIG. 2. The front view which shows the design board in FIG. 1 by itself. The top view which looked at the design board in FIG. 6 from the upper side. The side view which looked at the design board in FIG. 6 from the right side. FIG. 9 is a perspective view showing a disc brake according to a second embodiment. Sectional drawing which looked at the disk brake in FIG. 9 from the arrow XX direction. FIG. 10 is a cross-sectional view of the disk brake in FIG. 9 as viewed from the direction indicated by arrows XI-XI. FIG. 10 is a front view showing the design plate in FIG. 9 alone; The top view which looked at the design board in FIG. 12 from the upper side. The side view which looked at the design board in FIG. 12 from the right side. FIG. 10 is a perspective view showing a disc brake according to a third embodiment. FIG. 16 is a cross-sectional view of the disc brake in FIG. 15 viewed from the direction indicated by arrows XVI-XVI. The top view which shows the design board in FIG. 15 by itself. FIG. 14 is a perspective view showing a disc brake according to a fourth embodiment. FIG. 19 is a cross-sectional view of the disc brake in FIG. 18 as viewed from the direction indicated by arrows XIX-XIX. FIG. 19 is a sectional view of the disk brake in FIG. 18 as viewed from the direction of arrows XX-XX. The front view which shows the design board in FIG. 18 by itself. The top view which looked at the design board in FIG. 21 from the upper side. The side view which looked at the design board in FIG. 21 from the right side. FIG. 14 is a perspective view showing a disc brake according to a fifth embodiment. FIG. 25 is a sectional view of the disk brake in FIG. 24 as viewed from the direction of arrows XXV-XXV.

  Hereinafter, a case in which the disc brake according to the embodiment is mounted on a four-wheeled vehicle will be described as an example, with reference to the accompanying drawings.

  1 to 8 show a first embodiment. 1 and 2, a disc brake 1 applies a braking force to a vehicle (not shown) via a disc D (FIG. 2) as a member to be braked. The disk D is also called a disk rotor and rotates together with wheels (not shown). As shown in FIGS. 1 to 8, the disc brake 1 includes a mounting member 2, a caliper 5, a piston 13, an inner pad 14, an outer pad 15, and a design plate 18.

  An attachment member 2 called a carrier is attached to a non-rotating part (not shown) of the vehicle, located near the disk D. The attachment member 2 is disposed so as to straddle the outer peripheral side of the disk D in the axial direction of the disk D. The axial direction of the disk D corresponds to, for example, the X direction shown for reference in each drawing, and is also referred to as a “disk axial direction” in this specification.

  The mounting member 2 includes a pair of arms 2A, 2A, a support 2B, and a reinforcing beam 2C. Each of the arms 2A extends in the axial direction of the disk D so as to be spaced apart in the rotation direction of the disk D and straddle the outer periphery of the disk D. The rotation direction of the disk D corresponds to, for example, the Y direction shown for reference in each drawing, and is also referred to as a “disk rotation direction”, a “disk tangential direction”, or a “disk circumferential direction” in this specification.

  Each arm 2A, 2A supports the caliper 5 via sliding pins 3, 3 so as to be slidable in the disk axial direction. The support 2B is provided so as to integrate the base ends (upper ends in FIG. 2) of the arms 2A, 2A so as to be integrated, and is on the inner side of the disk D (upper side in the vertical direction in FIG. 2). In position, it is fixed to a non-rotating part of the vehicle. The reinforcing beam 2C connects the distal ends (the lower ends in FIG. 2) of the arms 2A, 2A to each other at positions on the outer side of the disk D (the lower side in the vertical direction in FIG. 2). As a result, the arms 2A, 2A of the mounting member 2 are integrally connected by the support 2B on the inner side of the disk D and integrally by the reinforcing beam 2C on the outer side.

  On the inner side of the mounting member 2, a pair of pad guides (not shown) for guiding the inner pad 14, which is an inner-side friction pad, in the disk axial direction is provided. Each pad guide is formed, for example, as a concave groove having a U-shaped cross section (substantially U-shaped cross section) extending in the disk axial direction, and is separated from one side in the disk rotation direction and the other side with the inner pad 14 interposed therebetween. I have. Each ear (not shown) of the inner pad 14 is fitted (inserted) into each pad guide via the pad springs 4, 4.

  On the other hand, a pair of pad guides 2D, 2D (see FIG. 3) for guiding the outer pad 15, which is an outer-side friction pad, in the disk axial direction is also provided on the outer side of the mounting member 2. Each of these pad guides 2D, 2D is also formed as a concave groove having a U-shaped cross section (substantially U-shaped cross section) extending in the disk axial direction, similarly to the pad guide on the inner side, and rotates the disk with the outer pad 15 interposed therebetween. One side of the direction is separated from the other side. The ear portions 15B1, 15B1 of the outer pad 15 are fitted (inserted) into the pad guides 2D, 2D via the pad springs 4, 4, respectively.

  The caliper 5 is mounted on the mounting member 2 (via sliding pins 3 and 3) so as to be movable (sliding displacement) in the disk axial direction. The caliper 5 is disposed so as to straddle the outer peripheral side of the disk D in the disk axial direction. The caliper 5 includes an inner leg 6, a bridge 9, and an outer leg 11.

  The inner leg 6 is provided on the inner side, which is one side in the disk axial direction. The inner leg portion 6 of the caliper 5 is provided with, for example, two cylinders 7 (only one is shown in FIG. 4) that is a twin bore. A piston 13 is slidably inserted into the cylinder 7. The brake fluid pressure is supplied into the cylinder 7 from the outside when the brake is operated. The inner leg portion 6 is integrally provided with a pair of pin mounting portions 8 projecting in the disk rotation direction. The pin mounting portions 8 and 8 support the entire caliper 5 via the sliding pins 3 and 3 so as to be slidable on the respective arms 2A and 2A of the mounting member 2.

  The bridge portion 9 extends from the inner leg portion 6 to the outer side, which is the other side in the disk axial direction, so as to straddle the outer peripheral side of the disk D between the arms 2A, 2A of the mounting member 2. The bridge portion 9 is provided with a pair of through holes 10, 10 that penetrate in the radial direction of the disk D and are spaced apart in the disk rotation direction. The radial direction of the disk D corresponds to, for example, the Z direction shown for reference in each drawing, and is also referred to as a “disk radial direction” in this specification.

  The outer leg portion 11 extends inward in the disk radial direction from the outer side, which is the distal end side of the bridge portion 9, and has a claw portion 12 having a three-pronged distal end side. That is, as shown in FIG. 3, the claw portion 12 is constituted by three claw pieces 12A, 12B, and 12C each of which has a three-pronged tip. The claw portion 12 (claw pieces 12A, 12B, 12C) abuts on the back plate 15B of the outer pad 15. The claw portion 12 presses the outer pad 15 toward the outer side surface (the lower side surface in FIG. 2) of the disk D during a brake operation (at the time of braking). As described above, the caliper 5 has the cylinder 7 (cylinder hole) into which the piston 13 is inserted on the inner side, and has the claw portion 12 on the outer side.

  As will be described later, the claw portion 12 of the caliper 5 is provided with design plate supporting engagement grooves 16, 16 (FIG. 3) located on the outer (outward side) side surface in the disk circumferential direction. Further, in the through hole 10 of the bridge portion 9 of the caliper 5, an engaging groove 17 for design plate support (only one is shown in FIG. 4) is formed on the inner surface on the outer side in the disk axis direction. The engaging claws 22 and 23 of the design plate 18 are engaged with the design plate supporting engagement grooves 16 and 17. Thus, the outer side of the claw portion 12 of the caliper 5 is covered with the design plate 18.

  The piston 13 is formed as a bottomed cylindrical body, and is slidably fitted in the cylinder 7 of the inner leg 6. The opening end face of the piston 13 on the tip side contacts the back plate 14B of the inner pad 14. The piston 13 presses the inner pad 14 toward the inner side surface (the upper side surface in FIG. 2) of the disk D during the brake operation.

  That is, when the brake fluid pressure is supplied from the outside into the cylinder 7, the piston 13 is slid in the disc axial direction toward the disc D by the fluid pressure at this time, so that the inner pad 14 Press one side (the inner side). At this time, when the caliper 5 receives the pressing reaction force from the disk D, the entire caliper 5 is slid and displaced toward the inner side with respect to the arms 2A, 2A of the mounting member 2, and the claw portion 12 moves the outer pad 15 to the disk. D is pressed against the other side (the outer side). As a result, a braking force can be applied to the disk D, and thus to the wheels.

  The inner pad 14 and the outer pad 15 are arranged to face both sides in the axial direction of the disk D. The inner pad 14 and the outer pad 15 are mounted on the mounting member 2 so as to be movable in the disk axial direction. The inner pad 14 is pressed against the disk D by the piston 13 from the inner side of the caliper 5, and the outer pad 15 is pressed against the disk D by the claw 12 from the outer side of the caliper 5. That is, the inner pad 14 presses the disk D from the inner side (one side in the disk axis direction) on the inner side of the caliper 5, and the outer pad 15 presses the disk D on the outer side (one side in the disk axis direction) of the caliper 5. Press from the other side).

  The inner pad 14 includes a lining 14A as a friction material that comes into frictional contact with the surface (one side surface in the axial direction) of the disk D, and a back plate 14B provided on a surface opposite to the lining 14A in the disk axial direction. ing. In this case, the lining 14A is fixed (joined) to a flat back plate 14B extending in the disk rotation direction. The back plate 14B is provided with ears (not shown) as protrusions each having a convex shape and located at the side edges on both sides in the disk rotation direction. Each ear is slidably inserted (inserted) into the pad guide of the mounting member 2 via the pad springs 4 and 4.

  Similarly to the inner pad 14, the outer pad 15 has a lining 15A as a friction material that comes into frictional contact with the surface (the other side in the axial direction) of the disk D, and a back plate 15B provided on a surface opposite to the lining 15A in the disk axial direction. It is comprised including. In this case, the lining 15A is fixed (joined) to a flat back plate 15B extending in the disk rotation direction. The back plate 15B is provided with ear portions 15B1 and 15B1 (FIG. 3) as protrusions each having a convex shape and located at the side edges on both sides in the disk rotation direction. The ears 15B1 and 15B1 are slidably inserted (inserted) into pad guides 2D and 2D of the mounting member 2 via pad springs 4 and 4, respectively.

  By the way, according to the above-mentioned conventional technology, a decorative plate (design plate) covering a claw portion of a caliper is fixed to a caliper bracket (support member) with a mounting bolt. For this reason, there is a possibility that adverse effects due to the vibration of the decorative plate, for example, an increase in chattering noise and a decrease in durability may be caused. In addition, since the decorative plate is fixed to the caliper bracket, changes in the natural frequency (eigenvalue) may reduce brake squeal performance and productivity, and may not be able to maintain desired performance. Therefore, in the embodiment, in order to reduce chatter noise due to vibration of the design plate 18 and improve durability, the caliper 5 is provided with the engagement grooves 16 and 17 and the design plate 18 is provided with the engagement claws 22 and 23. The design plate 18 is supported (fixed) on the caliper 5 by elastic force by engaging (clipping) the engagement claws 22 and 23 of the design plate 18 with the engagement grooves 16 and 17 of the caliper 5. Thereby, a vibration absorbing effect (damping effect) can be obtained.

  That is, the design plate 18 covers the outer side of the claw portion 12 of the caliper 5. In this case, the design plate 18 is supported by the caliper 5 so as to cover the claw portion 12 so that the claw portion 12 of the caliper 5 is not directly visible from the gap of the road wheel. In the embodiment, a total of four design plate supporting engagement grooves 16 and 17 are formed in the caliper 5. That is, a pair of design plate supporting engagement grooves 16 and 16 are formed in the claw portion 12 of the caliper 5, and a pair of design plate support engagement grooves 17 are formed in the bridge portion 9 of the caliper 5. Have been. More specifically, as shown in FIGS. 1 and 3, the claw portion 12 of the caliper 5 is located on the outer (outward side) side surface in the disk circumferential direction, and the design plate supporting engagement groove 16, 16 are formed. As shown in FIGS. 1, 2, and 4, a design plate supporting engagement groove 17 is provided in each through hole 10 of the bridge portion 9 of the caliper 5 at the inner surface on the outer side in the disk axis direction. Is formed.

  On the other hand, the design plate 18 is provided with engagement claws 22 and 23 that engage with the design plate support engagement grooves 16 and 17 of the caliper 5, respectively. The design plate 18 is supported by the caliper 5 by engaging the engagement claws 22 and 23 with the design plate support engagement grooves 16 and 17 of the caliper 5. That is, the engaging claws 22, 23 of the design plate 18 and the design plate supporting engagement grooves 16, 17 of the caliper 5 are elastically engaged.

  Here, the design plate 18 includes a front portion 19 that covers the claw portion 12 of the caliper 5 from the outer side in the disk axis direction, and a flat portion 20 that covers the bridge portion 9 of the caliper 5 from the outside (outside diameter side) in the disk radial direction. And a curved portion 21 connecting the front portion 19 and the flat portion 20. The front portion 19 is formed in a plate shape extending in the disk radial direction and the disk circumferential direction on the outer side of the claw portion 12. The flat portion 20 extends from the outside of the front portion 19 in the radial direction of the disk via the curved portion 21 toward the inner side in the axial direction of the disk. The plane portion 20 is formed in a plate shape extending in the disk axial direction and the disk circumferential direction outside the bridge portion 9 in the disk radial direction. In this case, the flat portion 20 extends in the disk axial direction from the claw portion 12 side of the caliper 5 to a position short of the through holes 10, 10 of the bridge portion 9.

  The front part 19 is provided with a pair of engaging claws 22 located outside the disk circumferential direction. The engaging claws 22, 22 extend from the outer peripheral edge of the front portion 19 in the disk circumferential direction toward the inner side in the disk axial direction. It is folded back in a U-shape toward the outer side in the direction. Then, the tip end side of the folded portion is engaged with the design plate supporting engagement grooves 16, 16 provided on the outer (outward side) side surface of the claw portion 12 of the caliper 5 in the disk circumferential direction. I have.

  Further, the flat portion 20 is provided with a pair of engaging claws 23, 23 located on the inner side in the disk axial direction. The engaging claws 23, 23 further extend from the inner edge of the flat portion 20 on the inner side in the disk axis direction toward the inner side, and the distal end side is directed toward the outer side in the disk axis direction and the inner side in the disk radial direction. It is folded back into a U-shape. The tip side of the folded portion is further bent substantially perpendicularly outward in the radial direction of the disk. The tip end side of the bent portion is engaged with a design plate supporting engagement groove 17 provided on the inner surface of the through hole 10 of the bridge portion 9 of the caliper 5 on the outer side in the disk axis direction.

  In the embodiment, the engagement claws 22 provided on the front portion 19 of the design plate 18 are engaged with the design plate support engagement grooves 16 of the caliper 5. The engaging portions between the engaging claws 22, 22 and the design plate supporting engagement grooves 16, 16 are circumferential engaging portions for preventing the design plate 18 from being displaced in the disk circumferential direction. The engaging claws 23 provided on the flat portion 20 of the design plate 18 are engaged with the design plate supporting engagement grooves 17 of the caliper 5. The engagement portions between the engagement claws 23, 23 and the design plate supporting engagement groove 17 are axial engagement portions for preventing the design plate 18 from being displaced in the disk axial direction. As described above, in the embodiment, the engaging portion between the engaging claws 22 and 23 of the design plate 18 and the design plate supporting engagement grooves 16 and 17 of the caliper 5 is such that the design plate 18 is displaced in the circumferential direction of the disk D. And an axial engagement portion for preventing the design plate 18 from being displaced in the axial direction of the disk D.

  The disc brake 1 according to the first embodiment has the above-described configuration, and its operation will be described next.

  First, at the time of the brake operation of the vehicle, the piston 13 is slid toward the disk D by supplying the brake fluid pressure to the cylinder 7 of the caliper 5, thereby pressing the inner pad 14 against one side surface of the disk D. At this time, when the caliper 5 receives the pressing reaction force from the disk D, the entire caliper 5 slides and displaces toward the inner side with respect to the arms 2A, 2A of the mounting member 2, and the claw portion 12 of the caliper 5 moves the outer pad. 15 is pressed against the other side of the disk D.

  As a result, the inner pad 14 and the outer pad 15 can strongly clamp the disk D that rotates with the wheel from both sides in the axial direction, and can apply a braking force to the disk D. When the brake operation is released, the supply of the hydraulic pressure to the cylinder 7 is stopped, so that the inner pad 14 and the outer pad 15 are separated from the disk D, and return to the non-braking state again.

  Here, according to the first embodiment, the outer side of the claw portion 12 of the caliper 5 is covered with the design plate 18. In this case, the design plate 18 is elastically supported (elastic) with respect to the caliper 5 by engaging the engagement claws 22 and 23 of the design plate 18 with the design plate supporting engagement grooves 16 and 17 of the caliper 5. Fixed by force). That is, the engaging claws 22, 23 and the design plate supporting engaging grooves 16, 17 are elastically engaged. Thereby, the vibration of the design plate 18 can be reduced (absorbed, damped). More specifically, chatter noise of the design plate 18 can be reduced, and a decrease in durability due to vibration can be suppressed. In addition, since it is not necessary to change the basic shape of the caliper 5, the influence of the design plate 18 on the caliper performance can be suppressed. Further, since the influence on the layout can be suppressed, it is not necessary to largely change the vehicle layout.

  Further, when performing maintenance on the disc brake 1 attached to the vehicle (for example, when replacing the inner pad 14 and the outer pad 15 which are friction pads), the design plate 18 can be removed. Therefore, after removing the design plate 18, it is possible to perform the same operation as a normal caliper (a caliper without a design plate).

  Further, the design plate 18 is supported on the caliper 5 only by the engagement between the engagement claws 22 and 23 and the design plate support engagement grooves 16 and 17. Therefore, for example, compared to a configuration in which a part is fixed by screwing, it is possible to further reduce the vibration of the design plate 18 and further improve the appearance. In any case, the size of the shape change from the base product (conventional product) can be reduced, the productivity is not impaired, and the appearance can be improved.

  According to the first embodiment, the design plate 18 has an engagement portion (a circumferential engagement portion) between the engagement claws 22, 22 of the front portion 19 of the design plate 18 and the engagement grooves 16, 16 for supporting the design plate. ) And the engaging portions (axial engaging portions) between the engaging claws 23 of the flat portion 20 of the design plate 18 and the design plate supporting engagement grooves 17. Therefore, even if the design plate 18 is supported on the caliper 5 only by the engagement claws 22 and 23 (that is, even if the design plate is not fixed by screwing), the design plate 18 is attached to the caliper 5. It can be stably supported. Thereby, both stable support of the design plate 18 and reduction of vibration of the design plate 18 can be achieved at a high level (level).

  Next, FIG. 9 to FIG. 14 show a second embodiment. The feature of the second embodiment is that the design plate is supported on the caliper by “engagement of the engagement claw with the engagement groove” and “screw-in using a screw”. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

  The caliper 31 is formed with a pair of design plate supporting engagement grooves 32 and a pair of female screw holes 33. That is, in the first embodiment described above, a total of four design plate supporting engagement grooves 16 and 17 are formed in the caliper 5. On the other hand, the caliper 31 of the second embodiment has a pair of design plate support engagement grooves 32 and a pair of female screw holes 33 instead of the four design plate support engagement grooves 16 and 17. Are formed.

  More specifically, the claw portion 12 of the caliper 31 is configured by three claw pieces 12A, 12B, and 12C whose tip ends are divided into three forks. Then, as shown in FIG. 10, between the base end side of the claw portion 12 of the caliper 31, in other words, between the adjacent claw pieces 12 </ b> A, 12 </ b> B, 12 </ b> C, each is opened to the inner surface in the disk radial direction. A design plate supporting engagement groove 32 is formed. As shown in FIGS. 9 and 11, portions of the bridge portion 9 of the caliper 31 that are separated from the through holes 10, that is, both ends in the disk circumferential direction of the bridge portion 9, respectively, A female screw hole 33 extending toward is formed. The fixing screws 34, 34 are screwed into the female screw holes 33.

  On the other hand, the design plate 35 is provided with engagement claws 39 that respectively engage with the design plate support engagement grooves 32 of the caliper 31. Further, the design plate 35 is provided with screwing pieces 40, 40 at positions corresponding to the female screw holes 33 of the caliper 31. The screwing pieces 40, 40 are formed with insertion holes 40A, 40A (FIGS. 11 and 13) through which fixing screws 34, 34 for pressing the screwing pieces 40, 40 to the bridge portion 9 are inserted. I have. The design plate 35 is supported by the caliper 31 by engaging the engaging claw 39 with the design plate supporting engagement groove 32 of the caliper 31. At the same time, the design plate 35 is inserted into the insertion holes 40A, 40A of the screwing pieces 40, 40, and the screwing pieces 40, 40 are bridged by the fixing screws 34, 34 screwed into the female screw holes 33 of the caliper 31. By being fixed to the portion 9, it is supported by the caliper 31.

  Here, the design plate 35 includes a front portion 36 that covers the claw portion 12 of the caliper 31 from the outer side in the disk axial direction, and a flat portion 37 that covers the bridge portion 9 of the caliper 31 from the outside (outside diameter side) in the disk radial direction. And a curved portion 38 connecting the front portion 36 and the flat portion 37. The front portion 36 is formed in a plate shape extending in the disk radial direction and the disk circumferential direction on the outer side of the claw portion 12. The flat portion 37 extends from the outside of the front portion 36 in the disc radial direction via the curved portion 38 toward the inner side in the disc axial direction. The flat portion 37 is formed in a plate shape extending in the disk axis direction and the disk circumferential direction outside the bridge portion 9 in the disk radial direction. In this case, the flat portion 37 extends in the disk axial direction from the claw portion 12 side of the caliper 31 to a position short of the through holes 10, 10 of the bridge portion 9.

  The front portion 36 is provided with a pair of engaging claws 39 located inside the radial direction of the disk. The engaging claw 39 extends from the inner edge of the front portion 36 in the radial direction of the disk toward the inner side in the axial direction of the disk, and the distal end thereof faces toward the outer side in the radial direction of the disk and toward the outer side in the axial direction of the disk. It is bent. The tip end side of the bent portion is engaged with the design plate supporting engagement groove 32 provided on the base end side of the claw portion 12 of the caliper 31 (between the adjacent claw pieces 12A, 12B, and 12C). ing.

  Further, the flat portion 37 is provided with a pair of screwing pieces 40, 40 located on the inner side in the disk axial direction. The screwing pieces 40, 40 extend further toward the inner side from the inner edge in the disk axial direction at both ends in the disk circumferential direction of the flat portion 37, and fixing screws 34, 34 are inserted into the center thereof. Insertion holes 40A, 40A are formed. The screwing pieces 40, 40 are fixed to the bridge 9 by fixing screws 34, 34 screwed into the female screw holes 33 of the caliper 31.

  In the second embodiment, the claw portion 12 of the caliper 31 is covered with the design plate 35 as described above, and there is no particular difference in the basic operation from that of the first embodiment. That is, also in the second embodiment, similarly to the first embodiment, the vibration of the design plate 35 is reduced by elastically engaging the engagement claw 39 with the design plate support engagement groove 32. be able to. Further, according to the second embodiment, the use of the fixing screws 34, 34 can improve the support strength of the design plate 35. Moreover, since the female screw holes 33 for screwing the fixing screws 34, 34 are provided in a flat position above the bridge portion 9 (outside in the disk radial direction), for example, the female screw holes 33 can be easily processed. Can be. Also, the fixing screws 34, 34 can be easily removed, and the design plate 35 can be easily removed. Thereby, productivity (workability, assemblability) can also be improved as compared with the related art.

  Next, FIG. 15 to FIG. 17 show a third embodiment. The feature of the third embodiment is that the design plate support structure of the first embodiment (that is, “engagement between the engagement claw and the engagement groove”) is added with “screw using a screw”. I did it. In the third embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

  Like the caliper 5 of the first embodiment, the caliper 41 is provided with design plate supporting engagement grooves 16 and 17 (see FIGS. 3 and 4), and also has a pair of female screw holes 42 (see FIG. 3). 16) is also formed. That is, in the first embodiment described above, a total of four design plate supporting engagement grooves 16 and 17 are formed in the caliper 5. On the other hand, in the caliper 41 of the third embodiment, a pair of female screw holes 42 are formed in addition to the four design plate supporting engagement grooves 16 and 17. Here, the female screw hole 42 is formed in the bridge portion 9 of the caliper 41. More specifically, as shown in FIGS. 15 and 16, portions of the bridge portion 9 of the caliper 41 that are separated from the through holes 10, that is, both ends of the bridge portion 9 in the disk circumferential direction are respectively A female screw hole 42 extending inward in the radial direction is formed. The fixing screws 43 are screwed into the female screw holes 42.

  On the other hand, the design plate 18 is provided with engagement claws 22 and 23 that engage with the design plate support engagement grooves 16 and 17 of the caliper 41, respectively. In addition, insertion holes 20A, 20A (FIGS. 16 and 17) through which fixing screws 43, 43 are inserted are formed in the flat portion 20 of the design plate 18 at positions corresponding to the female screw holes 42 of the caliper 41. Have been. The design plate 18 is supported by the caliper 41 by engaging the engaging claws 22 and 23 with the design plate supporting engagement grooves 16 and 17 of the caliper 41. At the same time, the design plate 18 is inserted into the insertion holes 20A, 20A of the flat portion 20, and the flat portion 20 is fixed to the bridge portion 9 by fixing screws 43, 43 screwed into the female screw holes 42 of the caliper 41. Thereby, it is supported by the caliper 41.

  In the third embodiment, the claw portion 12 of the caliper 41 is covered with the design plate 18 as described above, and there is no particular difference in the basic operation from that of the first embodiment. That is, in the third embodiment, similarly to the first embodiment, the engaging pawls 22 and 23 are engaged (elastically) with the engaging grooves 16 and 17 for supporting the design plate. Vibration can be reduced. Moreover, similarly to the second embodiment, the use of the fixing screws 43 can improve the support strength of the design plate 18. In addition, since the female screw holes 42 for screwing the fixing screws 43, 43 are provided at a flat position above the bridge portion 9 (outside in the disk radial direction), productivity (workability, assemblability) is also ensured. be able to.

  Next, FIG. 18 to FIG. 23 show a fourth embodiment. The features of the fourth embodiment reside in that a design plate is provided with an engaging claw and a circumferential direction suppressing portion, and that a flat portion of the design plate is fixed with screws using screws. In the fourth embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

  The caliper 51 has a pair of design plate supporting engagement grooves 52 and a pair of female screw holes 53. That is, as shown in FIG. 19, on the back surface of the inner leg portion 6 of the caliper 51, in other words, on the inner side surface in the disk axial direction, a pair of design plate supporting engagement grooves 52 are spaced apart in the disk circumferential direction. Is formed. As shown in FIGS. 18 and 20, female screw holes extending inward in the disk radial direction are provided at positions on the inner side in the disk axial direction of the respective through holes 10 in the bridge portion 9 of the caliper 51. 53 are formed apart from each other in the disk circumferential direction. The fixing screws 54 are screwed into the female screw hole 53.

  On the other hand, the design plate 55 is provided with engagement claws 59 that respectively engage with the design plate support engagement grooves 52 of the caliper 51. Further, the design plate 55 is provided with a circumferential restraining portion 60 that abuts on a side surface of the caliper 51 extending in the disk axis direction. Further, insertion holes 57A, 57A (FIGS. 20, 22) through which fixing screws 54, 54 are inserted are formed in the flat portion 57 of the design plate 55 at positions corresponding to the female screw holes 53 of the caliper 51. . The design plate 55 is supported by the caliper 51 by engaging the engagement claw 59 with the design plate support engagement groove 52 of the caliper 51. At the same time, the design plate 55 is positioned in the circumferential direction by the circumferential pressing portion 60 abutting on the side surface of the caliper 51. Further, the design plate 55 is inserted into the insertion holes 57A, 57A of the flat portion 57, and the flat portion 57 is fixed to the bridge portion 9 by fixing screws 54, 54 screwed into the female screw holes 53 of the caliper 51. Is supported by the caliper 51.

  Here, the design plate 55 includes a front portion 56 that covers the claw portion 12 of the caliper 51 from the outer side in the disk axis direction, and a flat portion 57 that covers the bridge portion 9 of the caliper 51 from the outside (outside diameter side) in the disk radial direction. And a curved portion 58 connecting the front portion 56 and the flat portion 57. The front portion 56 is formed in a plate shape extending in the disk radial direction and the disk circumferential direction on the outer side of the claw portion 12. The flat portion 57 extends from the outside of the front portion 56 in the radial direction of the disk via the curved portion 58 toward the inner side in the disk axial direction. The flat portion 57 is formed in a plate shape extending in the disk axial direction and the disk circumferential direction outside the bridge portion 9 in the disk radial direction. In this case, the flat portion 57 extends in the disk axial direction from the claw portion 12 side of the caliper 51 to the intermediate position of the inner leg portion 6 beyond the bridge portion 9 so as to cover the through holes 10, 10.

  The inner edge of the front portion 56 in the disk radial direction is a protruding portion 56A that protrudes toward the inner side in the disk axial direction. On the other hand, the flat portion 57 is provided with a pair of engaging claws 59 located on the inner side in the disk axial direction. The engagement claw 59 extends further toward the inner side from the inner edge of the flat portion 57 in the disk axis direction, and the distal end thereof has a V-shape toward the outer side in the disk axis direction and inward in the disk radial direction. It is folded back. The tip side of the folded portion is further bent substantially perpendicularly outward in the radial direction of the disk. A tip end side of the bent portion is engaged with a design plate supporting engagement groove 52 provided on a side surface of the inner leg portion 6 of the caliper 51.

  Further, at both ends of the flat portion 57 in the disk circumferential direction, circumferential suppressing portions 60 extending toward the inside in the disk radial direction are provided. The circumferential direction restraining portion 60 prevents (positions) the design plate 55 from being displaced in the disk circumferential direction by abutting on the side surface of the caliper 51 extending in the disk axial direction. This prevents the design plate 55 from being displaced in the circumferential direction (rotational direction) of the disk D separately from the engaging claw 59 that engages with the design plate supporting engagement groove 52 of the caliper 51. A circumferential restraining portion 60 for blocking is provided.

  Further, through holes 57A, 57A (FIGS. 20, 22) through which the fixing screws 54, 54 are inserted are formed in the flat portion 57 at positions corresponding to the female screw holes 53 of the caliper 51. The design plate 55 is inserted into the insertion holes 57A, 57A of the flat portion 57 and is fixed to the bridge portion 9 by fixing screws 54, 54 screwed into the female screw holes 53 of the caliper 51. It is supported by the caliper 51.

  In the fourth embodiment, the claw portion 12 of the caliper 51 is covered with the design plate 55 as described above, and its basic operation is not particularly different from that of the first embodiment. That is, in the fourth embodiment, as in the first embodiment, the vibration of the design plate 55 is reduced by engaging (elastically) the engagement claw 59 with the design plate supporting engagement groove 52. Can be reduced. Further, as in the second embodiment, by using the fixing screws 54, 54, the supporting strength of the design plate 55 can be improved, and the productivity (workability, assemblability) can be secured. Further, the design plate 55 can be prevented from being displaced in the disk circumferential direction by the circumferential suppressing portion 60 of the design plate 55. Thus, the design plate 55 can be stably supported on the caliper 51 also from this aspect.

  Next, FIG. 24 and FIG. 25 show a fifth embodiment. The feature of the fifth embodiment is that the design plate is supported on the caliper by the engaging claw and the circumferential direction suppressing portion. In the fifth embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

  The caliper 61 is formed with a total of four design plate supporting engagement grooves 62 and 63. That is, a pair of design plate supporting engagement grooves 62 are formed in the claw portion 12 of the caliper 61, and a pair of design plate support engagement grooves 63 are formed in the inner leg portion 6 of the caliper 61. ing. More specifically, as shown in FIG. 25, the base side of the claw portion 12 of the caliper 61, in other words, between the adjacent claw pieces 12A, 12B, and 12C, is provided on the inner surface in the disk radial direction, respectively. The design plate supporting engagement groove 62 is formed to be open. As shown in FIG. 25, a pair of design plate supporting engagement grooves 63 spaced apart in the disk circumferential direction are provided on the back surface of the inner leg portion 6 of the caliper 61, in other words, on the inner side surface in the disk axial direction. Is formed.

  On the other hand, the design plate 64 is provided with engagement claws 68 and 69 that engage with the design plate support engagement grooves 62 and 63 of the caliper 61, respectively. Further, the design plate 64 is provided with a circumferential restraining portion 70 that abuts on a side surface of the caliper 61 that extends in the disk axis direction. The design plate 64 is supported by the caliper 61 by engaging the engagement claws 68, 69 with the design plate supporting engagement grooves 62, 63 of the caliper 61. At the same time, the design plate 64 is positioned in the circumferential direction by the contact of the circumferential pressing portion 70 with the side surface of the caliper 61.

  Here, the design plate 64 includes a front portion 65 that covers the claw portion 12 of the caliper 61 from the outer side in the disk axial direction, and a flat portion 66 that covers the bridge portion 9 of the caliper 61 from the outside (outside diameter side) in the disk radial direction. And a curved portion 67 connecting the front portion 65 and the flat portion 66. The front portion 65 is formed in a plate shape extending in the disk radial direction and the disk circumferential direction on the outer side of the claw portion 12. The flat portion 66 extends from the outside of the front portion 65 in the radial direction of the disk via the curved portion 67 toward the inner side in the disk axial direction. The flat portion 66 is formed in a plate shape extending in the disk axial direction and the disk circumferential direction outside the bridge portion 9 in the disk radial direction. In this case, the flat portion 66 extends in the disk axis direction from the claw portion 12 side of the caliper 61 to the intermediate position of the inner leg portion 6 beyond the bridge portion 9 so as to cover the through holes 10 and 10.

  The front part 65 is provided with a pair of engaging claws 68 located inside the radial direction of the disk. The engaging claw 68 extends from the inner edge of the front portion 65 in the disk radial direction toward the inner side in the disk axial direction, and the distal end thereof faces outward in the disk radial direction and toward the outer side in the disk axial direction. It is bent. Then, the tip end side of the bent portion is engaged with the design plate supporting engagement groove 62 provided on the base end side of the claw portion 12 of the caliper 61 (between the adjacent claw pieces 12A, 12B, 12C). ing.

  A pair of engagement claws 69 are provided on the flat portion 66 on the inner side in the disk axial direction. The engaging claw 69 extends further toward the inner side from the inner edge of the flat portion 66 on the inner side in the disk axis direction, and the distal end thereof has a V-shape toward the outer side in the disk axis direction and the inner side in the disk radial direction. It is folded back. The tip side of the folded portion is further bent substantially perpendicularly outward in the radial direction of the disk. A tip end side of the bent portion is engaged with a design plate supporting engagement groove 63 provided on a side surface of the inner leg portion 6 of the caliper 61.

  Further, at both ends of the flat portion 66 in the disk circumferential direction, circumferential suppressing portions 70 extending inward in the disk radial direction are provided. The circumferential direction suppressing portion 70 prevents (positions) the design plate 64 from being displaced in the disk circumferential direction by abutting on the side surface of the caliper 61 extending in the disk axial direction. This prevents the design plate 64 from being displaced in the disk circumferential direction separately from the engagement claws 68 and 69 engaging with the design plate support engagement grooves 62 and 63 of the caliper 61. A circumferential restraint 70 is provided.

  In the fifth embodiment, the claw portion 12 of the caliper 61 is covered with the design plate 64 as described above, and its basic operation is not particularly different from that of the first embodiment. That is, also in the fifth embodiment, similarly to the first embodiment, the engaging pawls 68, 69 and the engaging grooves 62, 63 for supporting the design plate (elastically) are engaged, so that the design plate is formed. 64 can be reduced. Further, the design plate 64 can be prevented from being displaced in the disk circumferential direction by the circumferential direction suppressing portion 70 of the design plate 64. Thus, the design plate 64 can be stably supported on the caliper 61 also from this aspect.

  In the above-described first embodiment, an example has been described in which a twin bore configuration in which two pistons 13 are provided in the inner leg portion 6 of the caliper 5 is described. However, the present invention is not limited to this. For example, a single bore may be provided on the inner leg of the caliper, or three or more pistons may be provided on the inner leg of the caliper. This is the same for the second to fifth embodiments. In addition, each embodiment is an exemplification, and it goes without saying that partial replacement or combination of the configurations shown in different embodiments is possible.

  As the disc brake based on the embodiment described above, for example, the following one can be considered.

  As a first aspect, a caliper that is disposed straddling the outer peripheral side of a disk that rotates together with the wheel, has a cylinder in which a piston is inserted on the inner side, and has a claw portion on the outer side, and from the inner side of the caliper, An inner friction pad pressed against the disk by the piston, an outer friction pad pressed against the disk from the outer side of the caliper by the claw portion, and a design plate covering the outer side of the claw portion of the caliper And a design plate supporting engagement groove is formed in the caliper, and the design plate has an engaging claw that engages with the design plate supporting engagement groove. And the design plate is supported by the caliper by engaging the engagement claw with the design plate support engagement groove of the caliper. That.

  According to the first aspect, the design plate is elastically supported (fixed by elastic force) on the caliper by engaging the engagement claw of the design plate with the engagement groove for supporting the design plate of the caliper. be able to. Thereby, the vibration of the design plate can be reduced. More specifically, chatter noise of the design plate can be reduced, and a decrease in durability due to vibration can be suppressed. Moreover, since it is not necessary to change the basic shape of the caliper, it is possible to suppress the influence of the design plate on the caliper performance. Further, since the influence on the layout can be suppressed, it is not necessary to largely change the vehicle layout. Further, it is also possible to remove the design plate when performing maintenance on the disk brake attached to the vehicle (for example, when replacing the friction pad). For this reason, after removing the design plate, it is possible to perform the same operation as a normal caliper (a caliper without a design plate). Further, the design plate can be supported on the caliper only by the engagement between the engagement claw and the design plate supporting engagement groove. In this case, it is possible to further reduce the vibration of the design plate and further improve the appearance. In any case, since the scale of the shape change from the base product (conventional product) is small, the appearance can be improved without impairing the productivity.

  As a second aspect, in the first aspect, an engaging portion between the engaging claw of the design plate and the design plate supporting engagement groove of the caliper is such that the design plate is in a circumferential direction of the disk. A circumferential engagement portion for preventing displacement is provided, and an axial engagement portion for preventing the design plate from being displaced in the axial direction of the disk.

  According to the second aspect, since the design plate is provided with the circumferential direction engaging portion and the axial direction engaging portion, for example, even when the design plate is supported on the caliper only by these engagement portions, the design plate is Can be stably supported. Thus, both stable support of the design plate and reduction of the vibration of the design plate can be achieved at a higher level (level).

  According to a third aspect, in the first aspect, the design plate is provided on the design plate in a circumferential direction of the disc, separately from an engagement claw that engages with the design plate support engagement groove of the caliper. Is provided with a circumferential restraining portion for preventing displacement.

  According to the third aspect, the design plate can be prevented from being displaced in the circumferential direction of the disc by the circumferential direction suppressing portion of the design plate. Thus, the design plate can be stably supported on the caliper.

DESCRIPTION OF SYMBOLS 1 Disc brake 5, 31, 41, 51, 61 Caliper 7 Cylinder 12 Claw part 13 Piston 14 Inner pad (Inner side friction pad)
15 Outer pad (outer side friction pad)
16, 17, 32, 52, 62, 63 Design plate supporting engagement groove 18, 35, 55, 64 Design plate 22, 23, 39, 59, 68, 69 Engagement claw 60, 70 Circumferential holding part D disk

Claims (3)

A caliper that is arranged straddling the outer peripheral side of the disk that rotates with the wheels, has a cylinder in which a piston is inserted on the inner side, and has a claw portion on the outer side;
An inner-side friction pad pressed against the disc by the piston from the inner side of the caliper;
An outer friction pad pressed against the disc by the claw portion from the outer side of the caliper;
A design plate that covers an outer side of the claw portion of the caliper,
The caliper is provided with a design plate supporting engagement groove,
The design plate is provided with an engagement claw that engages with the design plate support engagement groove,
A disc brake, wherein the design plate is supported by the caliper by engaging the engaging claw with the design plate supporting engagement groove of the caliper. In claim 1,
An engagement portion between the engagement claw of the design plate and the design plate support engagement groove of the caliper, a circumferential engagement portion that prevents the design plate from being displaced in a circumferential direction of the disc, A disk brake comprising: an axial engagement portion for preventing the design plate from being displaced in an axial direction of the disk. In claim 1,
The design plate is provided with a circumferential restraining portion for preventing the design plate from being displaced in the circumferential direction of the disc, separately from an engagement claw that engages with the design plate support engagement groove of the caliper. Disc brake characterized by being used.

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