JP2010242893A - Disc brake device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disc brake device for preventing detachment of a decorative plate, and interference with parts of its periphery. <P>SOLUTION: Extension parts 6a, 6a extended so as to adjoin an outer peripheral edge of the decorative plate 8 in the periphery of the decorative plate 8 covering an outer face of a claw part 52 of a caliper body 5 are formed on retainers 6, 6 supporting pads 71, 72 on a caliper bracket 4. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a disc brake device used in an automobile or the like.

  2. Description of the Related Art Conventionally, as a disc brake device including a disc rotor that rotates with a wheel and a floating caliper mechanism, for example, one disclosed in Patent Document 1 is known. In this type of disc brake device, the caliper mechanism includes a cylinder portion that opposes one side surface of the disc rotor and inserts a piston, a claw portion that opposes the other side surface of the disc rotor, and a cylinder portion and a claw portion. A caliper body having a bridge portion connected across the disc rotor, a pair of pads respectively disposed between the piston and the disc rotor, and between a claw portion of the caliper body and the disc rotor, and both pads being discs. The caliper bracket is slidably supported in the axial direction of the rotor. In this case, both pads are slidably supported on the caliper bracket via a retainer interposed between the caliper bracket. Further, the claw portion of the caliper body is formed with a notch in a portion facing the cylinder portion, and the cylinder portion can be processed from the claw portion side through the notch portion.

JP 2005-282758 A

  By the way, in the disc brake device as shown in Patent Document 1, for the purpose of improving the design of the caliper mechanism or protecting the parts of the caliper mechanism, a decorative plate that covers the outer surface of the claw portion of the caliper body is used. It is generally known that the caliper bracket is mounted via a rivet or a screw.

  However, in this type of conventional disc brake device, the decorative plate is simply mounted on the caliper body or caliper bracket via rivets or screws, so that the rivets and screws loosen due to vibrations during vehicle running, etc. Then, the play of the decorative plate occurs, and as a result, the decorative plate may drop off or interfere with surrounding components.

  The present invention has been made in view of such a background, and an object of the present invention is to provide a disc brake device that can prevent the decorative plate from dropping off and interference with peripheral components.

  In order to achieve the above object, a disc brake device according to the present invention faces a disc rotor that rotates with a wheel, a cylinder portion that opposes one side surface of the disc rotor and inserts a piston, and opposes the other side surface of the disc rotor. A caliper body, a caliper body having a bridge portion for connecting the cylinder portion and the claw portion across the disk rotor, a space between the piston and the disk rotor, and a claw portion of the caliper body and the disk rotor. A pair of pads respectively disposed between the pair of pads, and a caliper bracket that supports the pair of pads slidably in the axial direction of the disk rotor via the retainer. A disc brake device that performs braking by pressing the pair of pads against a side surface of the disc rotor. An extending portion provided on the retainer so as to be adjacent to the outer peripheral edge of the decorative plate around the decorative plate. Is formed.

  According to the present invention, since the retainer is formed with the extending portion extending around the decorative plate so as to be adjacent to the outer peripheral edge of the decorative plate, the retainer is formed in a direction substantially parallel to the surface of the decorative plate. The movement of the decorative plate is limited by the contact between the outer peripheral edge of the decorative plate and the extending portion of the retainer.

  As a result, even if a screw or the like for fixing the decorative plate to the caliper bracket or the caliper body is loosened, it is possible to prevent the decorative plate from falling off or causing interference with the peripheral components.

  In the present invention, the caliper bracket is formed with a decorative plate facing portion adjacent to a part of the outer peripheral edge of the decorative plate around the decorative plate, and the extending portion of the retainer is formed of the caliper bracket. Preferably, the decorative plate is provided so as to be sandwiched between the decorative plate facing portion.

  According to this, since the decorative plate is disposed so as to be sandwiched between the decorative plate facing portion of the caliper bracket and the extending portion of the retainer, in particular, the decorative plate is disposed between the decorative plate facing portion and the retainer. It can prevent more reliably that it moves in the space | interval direction between extension parts. As a result, the effect which prevents the decorative plate from falling off can be further enhanced.

  Further, in the present invention, the extending portion of the retainer is formed with bent portions that are hooked on the concave portions formed on both sides of the caliper bracket in the longitudinal direction at both ends in the longitudinal direction of the decorative plate. It is preferable.

  According to this, the movement in the longitudinal direction of the decorative plate is limited by hooking the bent portions at both ends in the longitudinal direction of the decorative plate to the concave portions of the caliper bracket.

  As a result, the effect of preventing the decorative plate from falling off can be further enhanced. In particular, when combined with the invention including the decorative plate facing portion, it is possible to increase the certainty of preventing the play of the decorative plate from occurring.

An explanatory view showing an embodiment of a disc brake device of the present invention. The II-II line | wire sectional view taken on the line of FIG. FIG. 3 is a sectional view taken along line III-III in FIG. 2. FIG. 4 is a sectional view taken along line IV-IV in FIG. 1.

  An embodiment of a disc brake device of the present invention will be described below with reference to FIGS.

  In the figure, reference numeral 1 denotes a disc brake device used in an automobile. The disc brake device 1 includes a disc rotor 2 that rotates together with wheels, and a floating caliper mechanism 3 that brakes the rotation of the disc rotor 2 by sandwiching the disc rotor 2 between a pair of pads (and thus brakes the rotation of the wheels). Is provided. An arrow A in the figure indicates the direction of rotation of the disc rotor 2 when the vehicle is traveling forward.

  The caliper mechanism 3 is attached to the caliper bracket 4 fixed to the vehicle body via a knuckle or the like, and attached to the caliper bracket 4 so as to be movable in the axial direction of the disk rotor 2 via slide pins 5a and 5a (see FIG. 3). A caliper body 5 and a pair of pads 71 and 72 (see FIG. 2) which are arranged so as to sandwich the disc rotor 2 from the side and are supported by the caliper bracket 4 so as to be slidable in the axial direction of the disc rotor 2 Is provided. In the following description, the left-right direction in FIGS. 1 and 3 (the direction perpendicular to the radial direction of the disk rotor 2) may be referred to as the width direction of the caliper mechanism 3.

  The caliper bracket 4 includes base portions 4a and 4a constituting both side portions of the caliper mechanism 3 in the width direction, and a plurality of base connecting portions 4b for connecting the base portions 4a and 4a. Each base connecting portion 4b extends in the width direction of the caliper mechanism 3 between the lower portion of one base portion 4a and the lower portion of the other base portion 4a, and is configured integrally with the base portions 4a and 4a. . As shown in FIG. 2, the caliper bracket 4 of the illustrated example includes a base connecting portion 4b1 disposed on one side surface of the disk plate 2 and a base connecting portion 4b2 disposed on the other side surface. The caliper body 5 and the pads 71 and 72 are disposed between the base portions 4a and 4a on the upper side of the base connecting portions 4b1 and 4b2.

  The pad 71 includes a lining 71a that is in sliding contact with one side surface of the disk rotor 2, and a metal back plate 71b that holds the lining 71a. Similarly, the pad 72 includes a lining 72a that is in sliding contact with the other side surface of the disk rotor 2, and a metal back plate 72b that holds the lining 72a.

  A thin plate material is formed between both side portions (both side portions in the width direction of the caliper mechanism 3) of the back plates 71b and 72b of both pads 71 and 72 and each of the base portions 4a and 4a of the caliper bracket 4. The retained retainers 6 and 6 are interposed. Each retainer 6 is attached to the inner side surface portion of each base portion 4a of the caliper bracket 4, and is in sliding contact with each side portion of the back plates 71b and 72b. Both pads 71 and 72 can slide in the axial direction of the disc rotor 2 with respect to the caliper bracket 4 with both side portions of the back plates 71b and 72b being in sliding contact with the retainers 6 and 6, respectively. It is supported on the caliper bracket 4 via the retainers 6 and 6.

  As shown in FIG. 2, the caliper body 5 includes a cylinder portion 51 that faces one side surface of the disk rotor 2, a claw portion 52 that faces the other side surface of the disk rotor 2, a cylinder portion 51, and a claw portion 52. And a bridge portion 53 that connects the disk rotors 2 across the disk rotor 2.

  A piston 51a is inserted into the cylinder portion 51 so as to be slidable in the axial direction of the disk rotor 2, and the cylinder portion 51 and the piston 51a define a hydraulic chamber 51b. In addition, pads 71 and 72 are disposed between the piston 51a and the disk rotor 2 and between the claw portion 52 and the disk rotor 2, respectively. Hereinafter, the pad 71 may be referred to as a piston side pad 71, and the pad 72 may be referred to as a claw part side pad 72.

  In the caliper mechanism 3 having the above structure, when the hydraulic oil is supplied to the hydraulic chamber 51b, the piston 51a presses the piston-side pad 71 against the disc rotor 2. At the same time, the caliper body 5 moves in the direction opposite to the pressing direction of the piston 51 a due to the reaction force of the pressing force of the piston 51 a and presses the claw portion side pad 72 against the disc rotor 2 via the claw portion 52. As a result, the disk rotor 2 is sandwiched between the pads 71 and 72, and the rotation of the disk rotor 2 is braked.

  A thin portion 53a is formed in the central portion of the bridge portion 53 to reduce the weight, and the thickness of the other portion is increased to increase the connection strength between the cylinder portion 51 and the claw portion 52. It is a thick part 53b. A window 53c is formed at the center of the thin portion 53a so that the degree of wear of the pads 71 and 72 can be visually recognized.

  In addition, the claw portion 52 is formed with a notched portion 52a that is largely cut from the distal end to the proximal end, and has a bifurcated shape. The cylinder portion 51 into which the piston 51a is inserted through the notched portion 52a can be easily processed. is doing.

  The disc brake device of this embodiment further includes a decorative plate 8 disposed on the side of the claw portion 52 of the caliper body 5 so as to face the claw portion 52 so as to cover the outer surface of the claw portion 52. The decorative plate 8 has a shape that is long in the width direction of the caliper mechanism 3, the central portion in the longitudinal direction covers the cutout portion 52 a of the claw portion 52 and its peripheral portion, and both side portions of the caliper bracket 4. It arrange | positions so that it may oppose to the base | substrate parts 4a and 4a in the axial direction of the disc plate 2. As shown in FIG.

  As shown in FIG. 4, screw insertion holes 8 a are formed in both sides of the decorative plate 8, and screws 9 having shaft portions inserted into the screw insertion holes 8 a are attached to the caliper bracket 4. Each side part of the decorative plate 8 is fastened to the base part 4a by screwing into a screw hole 4c drilled in the base part 4a. Thereby, the decorative plate 8 is attached to the caliper bracket 4. The decorative plate 8 is fastened to the caliper bracket 4 via, for example, rivets, or the decorative plate 8 is calipered by inserting a pin projecting from one of the decorative plate 8 and the caliper bracket 4 into a pin hole formed in the other. The bracket 4 may be attached.

  Here, in the present embodiment, of the base connecting portions 4b of the caliper bracket 4, the base connecting portion 4b2 extending in the width direction of the caliper mechanism 3 on the claw 52 side functions as a decorative plate facing portion in the present invention. In the lower part of the periphery of the decorative plate 8, the lower end side of the outer peripheral edge of the decorative plate 8 is close to and opposed to the lower side of the long side of the decorative plate 8 along its longitudinal direction. Adjacent to the long side.

  Further, each of the retainers 6 and 6 of the caliper bracket 4 is formed with an extending portion 6a extending as far as an upper portion of the periphery of the decorative plate 8 as a part of the retainer 6. The extending part 6 a is adjacent to the upper side long side part so as to be close to and opposed to a part of the upper side long side part of the outer peripheral edge of the decorative plate 8.

  Therefore, the decorative plate 8 is disposed so as to be sandwiched between the extending portions 6 a and 6 a of the retainers 6 and 6 and the base connecting portion 4 b 2 (the decorative plate facing portion) of the caliper bracket 4.

  Furthermore, the portions of the both sides of the decorative plate 8 in the longitudinal direction, which are closer to the end than the screw insertion hole 8a, are bent toward the base portion 4a as shown in FIG. This is part 8b. And the front-end | tip part of this each bending part 8b is inserted in the groove-shaped recessed part 4d formed in the location near the decorative plate 8 in the outer side surface part of the base | substrate part 4a of the caliper bracket 4 so that it might extend in the up-down direction. It is hung up.

  Since the decorative plate 8 is assembled to the caliper mechanism 3 as described above, the decorative plate 8 moves in the vertical direction (direction substantially perpendicular to the longitudinal direction) so that the extending portions 6a and 6a of the retainers 6 and 6 are extended. And the base plate connecting portion 4b2 of the caliper bracket 4, and the longitudinal movement of the decorative plate 8 is the bent portions 8b, 8b and the concave portions 4d, 4d of the base portions 4a, 4a of the caliper bracket 4. Limited by the engagement. For this reason, even if the screw 9 is loosened due to the vibration of the vehicle or the like, it is possible to prevent the decorative plate 8 from dropping off or causing interference with other components in the vicinity thereof.

  In the present embodiment, the decorative plate 8 is attached to the caliper bracket 4, but it may be attached to the caliper body 5 via screws, rivets, or the like.

  Further, the extending portion of the retainer 6 may be formed not only on the upper side of the decorative plate 8 but also on the lower side, and the vertical movement of the decorative plate 8 may be restricted by these extending portions.

  DESCRIPTION OF SYMBOLS 1 ... Disc brake device, 2 ... Disc rotor, 3 ... Caliper mechanism, 4 ... Caliper bracket, 4b2 ... Base | substrate connection part (decoration plate opposing part), 4d ... Recessed part, 5 ... Caliper body, 51 ... Cylinder part, 51a ... Piston 52 ... Claw part, 53 ... Bridge part, 6 ... Retainer, 6a ... Extension part, 71, 72 ... Pad, 8 ... Cosmetic plate, 8b ... Bending part.

Claims (3)

A disk rotor that rotates with the wheels;
A cylinder portion that faces one side surface of the disk rotor and inserts a piston, a claw portion that faces the other side surface of the disk rotor, and a bridge portion that connects the cylinder portion and the claw portion across the disk rotor. A caliper body having,
A pair of pads respectively disposed between the piston and the disk rotor and between the claw portion of the caliper body and the disk rotor;
A retainer is interposed between the pair of pads, and a caliper bracket that supports the pair of pads slidably in the axial direction of the disk rotor via the retainer,
In the disc brake device that performs braking by pressing the pair of pads against the side surface of the disc rotor,
A decorative plate disposed to face the claw portion so as to cover the outer surface of the claw portion of the caliper body;
2. A disc brake device according to claim 1, wherein the retainer is formed with an extending portion extending around the decorative plate so as to be adjacent to the outer peripheral edge of the decorative plate. The disc brake device according to claim 1, wherein
The caliper bracket is formed with a decorative plate facing portion adjacent to a part of the outer peripheral edge of the decorative plate around the decorative plate, and the extending portion of the retainer is connected to the decorative plate facing portion of the caliper bracket. A disc brake device provided so as to sandwich the decorative plate therebetween. The disc brake device according to claim 1 or 2,
2. A disc brake device according to claim 1, wherein both ends of the decorative plate in the longitudinal direction are formed with bent portions that engage with recesses formed on both sides of the caliper bracket in the longitudinal direction.