JP4492437B2 - Disc brake device for vehicle - Google Patents

Description

  The present invention relates to a vehicle disc brake device that is installed in a vehicle as a braking device.

  2. Description of the Related Art Conventionally, as a vehicle disc brake device that presses a brake pad against a disc rotor to obtain a braking force by frictional contact between them, a so-called floating caliper is generally known. This floating caliper is used as a means for pressing a pair of left and right brake pads against the left and right rotor surfaces of a disc rotor, for example, a cylinder portion in which a piston that presses one brake pad is inserted and the other brake pad is pressed. And a pair of claw portions that support the mounting so as to be slidable in the direction of the rotation axis of the disc rotor via a pair of slide pins (see, for example, Patent Document 1).

Also, in this type of vehicle disc brake device, in order to prevent so-called brake squeaking noise by suppressing high-frequency vibration generated by the brake pad during braking, a pad shim having a vibration damping effect is attached to the back pad of the brake pad. (For example, refer to Patent Document 2).
JP 2002-39233 A JP-A-7-103269

  By the way, a floating caliper generally known in the past usually has a heavy cylinder portion disposed on the opposite side of a slide pin that is slidably fitted into a mounting guide hole. The slide pin is fitted in the mounting guide hole with a predetermined clearance.

  For this reason, when the disc brake device is not braked, the caliper has a moment acting on the guide hole of the mounting due to the gravity acting on the center of gravity in the vicinity of the cylinder, and this moment causes the slide pin to tilt with the caliper and the mounting. A twist occurs between the guide hole and the guide hole. And since the twisted slide pin acts as a spring, there is a problem that the entire caliper vibrates and contributes to a so-called brake squealing phenomenon.

  Accordingly, an object of the present invention is to provide a vehicle disc brake device that can suppress a brake squealing phenomenon during non-braking.

According to a first aspect of the present invention, there is provided a vehicular disc brake device in which a caliper that presses the brake pad against the disc rotor is supported so as to be slidable in the direction of the axis of rotation of the disc rotor with respect to the mounting. A disc brake device in which a pad shim is attached to a back metal, and the pad shim has a central portion in the longitudinal direction along the circumferential direction of the disc rotor that abuts against the back metal of the brake pad, and both side portions thereof are a pair of upper and lower claws of the caliper It is bent so as to function as a leaf spring that abuts on each part .

  Here, as a mode in which the center portion of the pad shim abuts on the back metal of the brake pad, in addition to a mode in which the center portion of the pad shim directly abuts on the back metal, the back metal is attached to the back metal through another pad shim attached to the pad shim. A mode of contact is also included.

In the vehicle disk brake apparatus according to the first invention, during non-braking, both sides of Paddoshimu folded to function as a plate spring against the moment acting a pair of upper and lower claw portions of the caliper to the caliper disk Since the pressing is performed in the direction of the rotation axis of the rotor, the inclination of the caliper and the slide pin is suppressed.

The vehicle disc brake device according to the first invention, the upper and lower pair of claw portions on both sides portion of the caliper than the claw portion disposed below one of the upper and lower pair of claw portions of the bent position abutting Paddoshimu caliper If it is set at a position close to the claw part arranged above, both sides of the pad shim are arranged above the claw part arranged below so as to generate a moment in the opposite direction to the moment acting on the caliper. Since the claw portion is pressed in the direction of the rotation axis of the disc rotor with a larger spring force, the inclination of the caliper and the slide pin is effectively suppressed.

According to a second aspect of the present invention, there is provided a vehicle disc brake device in which a caliper that presses the brake pad against the disc rotor is supported so as to be slidable in the direction of the rotation axis of the disc rotor with respect to the mounting. A disc brake device in which a pad shim is attached to a back metal, wherein the pad shim includes a pair of upper and lower claw portions of a caliper , or an upper portion and a lower portion of a tip surface of a piston fitted into a caliper cylinder portion. portion to the tip portion abuts each base end portion, characterized in that the pair of cut-and-raised piece as a leaf spring abuts each back metal of the brake pad is formed.

  In the vehicle disc brake device according to the second aspect of the present invention, when not braked, the cut-and-raised piece as the leaf spring of the pad shim has a moment acting on the caliper by the piston inserted in the caliper claw portion or the caliper cylinder portion. As a result, the tilt of the caliper and the slide pin is suppressed because the disc rotor is pressed in the direction of the rotation axis.

  In the vehicle disc brake device according to the second aspect of the present invention, when the cut and raised pieces as the leaf springs protrude from the center portion of the pad shim toward both sides thereof, the spring reaction force by the cut and raised pieces is cut and raised. Since this acts on the central part of the back pad of the brake pad from the base end of the pad member, uneven wear of the pad member is reduced as compared with the case where the spring reaction force acts on both ends of the back pad of the brake pad.

In the vehicle disk brake apparatus according to the first invention, during non-braking, both sides of Paddoshimu folded to function as a plate spring against the moment acting a pair of upper and lower claw portions of the caliper to the caliper disk Since the pressing is performed in the direction of the rotation axis of the rotor, the inclination of the caliper and the slide pin is suppressed. Therefore, according to the vehicle disc brake device of the first aspect, it is possible to suppress a brake squeal phenomenon during non-braking due to vibration of the entire caliper due to twisting of the slide pin. In addition, it is possible to suppress the occurrence of brake vibration at the time of braking due to the pad member of the brake pad slidingly contacting the rotor surface of the disc rotor in a single-contact state due to tilting of the caliper, and as a result, the pad member is unevenly worn. it can.

  In the vehicle disc brake device according to the first aspect of the present invention, the folding position of the pad shim where both side portions abut against the claw portion of the caliper is disposed above the claw portion disposed below among the pair of claw portions of the caliper. When the position is close to the nail part, the nail part arranged above the nail part where the both sides of the pad shim are arranged below so as to generate a moment in the opposite direction to the moment acting on the caliper Is pressed in the direction of the rotation axis of the disk rotor with a larger spring force, so that the inclination of the caliper and the slide pin is effectively suppressed. Therefore, in this case, the brake squeal phenomenon during non-braking can be effectively suppressed, and the occurrence of brake vibration during braking can be effectively suppressed.

  In the vehicle disc brake device according to the second aspect of the present invention, when not braked, the cut-and-raised piece as the leaf spring of the pad shim has a moment acting on the caliper by the piston inserted in the caliper claw portion or the caliper cylinder portion. As a result, the tilt of the caliper and the slide pin is suppressed because the disc rotor is pressed in the direction of the rotation axis. Therefore, according to the vehicle disc brake device according to the second invention, the brake squeal phenomenon at the time of non-braking can be suppressed as well as at the time of braking, similarly to the vehicle disc brake device according to the first invention. The occurrence of brake vibration can be suppressed.

  In the vehicle disc brake device according to the second aspect of the present invention, when the cut and raised pieces as the leaf springs protrude from the center portion of the pad shim toward both sides thereof, the spring reaction force by the cut and raised pieces is cut and raised. Since this acts on the center part of the brake pad from the base end part, uneven wear of the pad member can be reduced as compared with the case where the spring reaction force acts on both end parts of the back metal of the brake pad.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a vehicle disc brake device according to the present invention will be described with reference to the drawings. In the drawings to be referred to, FIG. 1 is a perspective view showing an external appearance of a vehicle disc brake device according to an embodiment of the present invention, and FIG. 2 is a schematic cross-sectional structure of a caliper of the vehicle disc brake device shown in FIG. FIG. 3 is a front view of one pad shim shown in FIG.

  A vehicle disc brake device according to an embodiment is supported by a disc rotor 2 that is fixed to an axle hub 1 and rotates together with a suspension part of a vehicle body (not shown), for example, as shown in FIG. The mounting rotor 3 is disposed so as to straddle the outer periphery of the disc rotor 2, and the disc rotor 2 is rotated with respect to the mounting 3 via a pair of slide pins 4, 4. And a floating caliper 5 slidably mounted in the axial direction.

  As shown in FIG. 2, the caliper 5 has a cylinder portion 5A facing the inner rotor surface 2A formed on the outer periphery of the disc rotor 2, and a pair of claw portions 5B and 5C facing the outer rotor surface 2B. A piston 5D is inserted into the cylinder portion 5A. The piston 5D is configured to advance and retract in parallel with the rotation axis of the disc rotor 2 in accordance with brake hydraulic pressure supplied to the cylinder portion 5A via a vehicle brake pipe (not shown).

  A brake pad 6 is disposed between the claw portions 5B and 5C of the caliper 5 and the outer rotor surface 2B of the disc rotor 2, and the piston 5D fitted into the cylinder portion 5A of the caliper 5 and the inner rotor surface of the disc rotor 2 are disposed. A brake pad 7 is disposed between 2A.

  The brake pads 6 and 7 have a structure in which pad members 6B and 7B are joined to the back metal 6A and 7A. One brake pad 6 has the back metal 6A facing the claw portions 5B and 5C of the caliper 5, and the pad member 6B. Faces the outer rotor surface 2 </ b> B of the disk rotor 2. In the other brake pad 7, the back metal 7 </ b> A faces the piston 5 </ b> D fitted into the cylinder portion 5 </ b> A of the caliper 5, and the pad member 7 </ b> B faces the inner rotor surface 2 </ b> A of the disk rotor 2.

  The brake pads 6 and 7 having such a structure are restricted in movement in the rotation direction of the disk rotor 2 so that torque in the rotation direction of the disk rotor 2 can be input to the mounting 3, and in the rotation axis direction of the disk rotor 2. Is mounted on the mounting 3 in a movable state.

  Here, a pad shim 8 is attached to the back metal 6A of one brake pad 6 in order to suppress high-frequency vibration generated by the brake pads 6 and 7 during braking to prevent so-called brake squeal noise. 7 has a pad shim 9 attached thereto.

  The pad shim 8 has a front shape as shown in FIG. 3 corresponding to the back metal 6A of the brake pad 6, and a clip piece 8A formed at the center of the upper edge portion and clips formed at the left and right sides of the lower edge portion. The pieces 8B and 8C are configured to be hooked on the back metal 6A of the brake pad 6. Although not shown in the figure, the pad shim 9 is also configured in substantially the same manner as the pad shim 8, and the front edge of the pad shim 9 corresponding to the back metal 7A of the brake pad 7 has a center at the upper edge and right and left of the lower edge. Clip pieces similar to the clip pieces 8A, 8B, 8C are formed.

  Here, while the pad shim 9 is formed flat like the conventional example, the pad shim 8 has a central portion in the longitudinal direction along the circumferential direction of the disk rotor 2 abutting against the back metal 6A of the brake pad 6, At a gentle angle in the direction away from the backing metal 6A of the brake pad 6 along the radial direction of the disc rotor 2 (see FIG. 2) so that both side portions function as leaf springs that contact the claws 5B and 5C of the caliper 5. It is bent (see FIG. 4).

  The bending position B of the pad shim 8 is set at a position close to one of the claw portions 5B and 5C of the caliper 5 that is disposed above. Here, in the first embodiment shown in FIG. 1, the caliper 5 is disposed near the front upper part of the outer peripheral portion of the disc rotor 2, and the claw portions 5 </ b> B and 5 </ b> C of the caliper 5 are disposed obliquely up and down. The claw portion 5B is disposed above the claw portion 5C. Therefore, the bending position B of the pad shim 8 is set at a position closer to the upper claw part 5B than the lower claw part 5C. That is, in the longitudinal direction of the pad shim 8 shown in FIG. 3 and FIG. 4, the position is slightly shifted from the center where the clip piece 8A is formed to one side where the clip piece 8C is formed in a range where it does not overlap the claw portion 5B. Is set.

  In the disc brake device of one embodiment configured as described above, a pair of upper and lower slide pins 4A and 4B are inserted into a pair of upper and lower guide holes 3A and 3B formed in the mounting 3, as schematically shown in FIG. Are slidably fitted with a predetermined clearance, and the caliper 5 is slidable in the direction of the rotational axis of the disc rotor 2 through the pair of upper and lower slide pins 4A and 4B. Further, the caliper 5 is disposed such that the heavy cylinder portion 5A protrudes on the opposite side of the slide pins 4 and 4, and the center of gravity of the caliper 5 is on the cylinder portion 5A. Therefore, during non-braking, the caliper 5 is acted on by a downward moment centered around the entrance of the lower guide hole 3B, and the caliper 5 tends to tilt toward the cylinder portion 5A by this moment (see FIG. 6). ).

  However, in the disc brake device of one embodiment, the pad shim 8 (FIGS. 3 and FIG. 3) is bent at a loose angle in the direction away from the back metal 6A of the brake pad 6 along the radial direction of the disc rotor 2 (see FIG. 2). 4) functions as a leaf spring, and both side portions of the pad shim 8 press the pair of upper and lower claw portions 5B and 5C of the caliper 5 against the rotating moment of the disc rotor 2 against the downward moment acting on the caliper 5. (See FIG. 7).

  As a result, the slide pins 4A and 4B together with the caliper 5 are restrained from tilting toward the cylinder portion 5A as shown in FIG. 6, and the slide pin 4B comes into contact with the guide hole 3B of the mounting 3 to cause twisting. The situation is suppressed. At that time, the claw portion 5B in which one end portion of the pad shim 8 having a short distance from the bending position B is arranged upward is moved in the direction of the rotation axis of the disk rotor 2 with a larger spring force than the claw portion 5C arranged in the lower portion. Since the pressing force generates a moment in the direction opposite to the moment acting on the caliper 5, the twisting of the slide pins 4 </ b> A and 4 </ b> B due to the tilting of the caliper 5 is effectively suppressed.

  Therefore, according to the disc brake device of one embodiment, it is possible to effectively suppress the brake squeal phenomenon during non-braking due to the entire caliper 5 vibrating due to the twisting of the slide pin 4B. Further, due to the tilt of the caliper 5, the pad members 6B and 7B of the brake pads 6 and 7 are in sliding contact with the outer rotor surface 2B and the inner rotor surface 2A of the disc rotor 2, and as a result, the pad members 6B and 7B. It is possible to effectively suppress the occurrence of brake vibration during braking due to uneven wear.

  Further, the spring reaction force by the pad shim 8 bent at the bending position B acts on the center portion of the back metal 6A of the brake pad 6 from the bending position B, so that the pad member 6B is uniformly applied to the outer rotor surface 2B of the disc rotor 2. Since contact is always made with a weak force, uneven wear at both ends of the pad member 6B is reduced. Even when the outer rotor surface 2B is slightly touched by the influence of the assembly accuracy of the disk rotor 2 with respect to the hub 1 shown in FIG. 1, the pad member 6B is always weak against the outer rotor surface 2B of the disk rotor 2. Due to the uniform contact with force, uneven wear of the outer rotor surface 2B is prevented. Therefore, it is possible to effectively suppress the occurrence of brake vibration during braking due to uneven wear of the pad member 6B and uneven wear of the outer rotor surface 2B of the disc rotor 2.

  The vehicle disc brake device of the present invention is not limited to the above-described embodiment. For example, the pad shim 8 shown in FIGS. 3 and 4 can be changed to the pad shim 18 shown in FIGS. The pad shim 18 has a distal end abutted against a pair of upper and lower claws 5B and 5C of the caliper 5 and a proximal end abutted against a back metal 6A of the brake pad 6 so that the claws 5B and 5C are rotated by the disk rotor 2. A pair of cut and raised pieces 18A and 18B are formed as leaf springs that press in the axial direction.

  The cut and raised pieces 18A and 18B are loose in the direction in which the base end portion located at the center in the longitudinal direction of the pad shim 18 is separated from the back metal 6A of the brake pad 6 along the radial direction of the disc rotor 2 (see FIG. 2). It is bent at an angle, and its tip protrudes from the center of the pad shim 18 toward both sides of the pair of upper and lower claws 5B, 5C of the caliper 5. In addition, the base end part which is a bending location of the cut-and-raised pieces 18A and 18B is set such that it does not overlap with the claw portions 5B and 5C even when the pad shim 18 slightly moves in the longitudinal direction.

  Such a pad shim 18 is a pair of upper and lower parts of the caliper 5 against the moment that the pair of raised and raised pieces 18A and 18B as leaf springs act on the caliper 5 in the non-braking state, like the pad shim 8 described above. The claw portions 5B and 5C are pressed in the direction of the rotation axis of the disc rotor 2. As a result, the slide pins 4A and 4B together with the caliper 5 are restrained from tilting toward the cylinder portion 5A as shown in FIG. 6, and the slide pin 4B comes into contact with the guide hole 3B of the mounting 3 to cause twisting. The situation is suppressed.

  At that time, the spring reaction force of the pair of raised and raised pieces 18A and 18B acts on the central portion of the back metal 6A of the brake pad 6 so that the pad member 6B is uniformly in contact with the outer rotor surface 2B of the disk rotor 2 with a weak force at all times. Therefore, uneven wear of the pad member 6B is reduced.

  Accordingly, even in the vehicle disc brake device provided with the pad shim 18, the brake squeal phenomenon at the time of non-braking caused by the twisting of the slide pin 4B can be effectively suppressed, and at the time of braking caused by the tilting of the caliper 5. The occurrence of brake vibration can be effectively suppressed. Since uneven wear of the pad member 6B and uneven wear of the outer rotor surface 2B of the disk rotor 2 can be reduced, braking caused by uneven wear of the pad member 6B or uneven wear of the outer rotor surface 2B of the disk rotor 2 is achieved. The occurrence of brake vibration at the time can be effectively suppressed.

  In the pad shim 18 shown in FIG. 8, in order to suppress the tilting of the caliper 5 against the moment acting on the caliper 5, the claw disposed at least on the upper side of the pair of upper and lower claw portions 5B and 5C. One cut and raised piece 18A for pressing the portion 5B may be provided, and the other cut and raised piece 18B may be omitted.

  The pair of cut and raised pieces 18A and 18B may exhibit substantially the same spring force with substantially the same length and bending angle from the base end portion to the tip end portion, but the upper claw portion Of the cut and raised piece 18A from the base end to the tip so that the spring force of the cut and raised piece 18A that presses 5B is greater than the spring force of the cut and raised piece 18B that presses the lower claw 5C. The length may be cut and made shorter than the length of the piece 18B, or the bending angle of the cutting and raising piece 18A may be set larger than the bending angle of the piece 18B.

  In the vehicle disc brake device of the present invention, the pad shim 9 on the piston 5D side shown in FIG. 2 can be changed to the pad shim 19 shown in FIGS. The front end of the pad shim 19 abuts on the front end surface of a cylindrical piston 5D fitted into the cylinder portion 5A of the caliper 5, and the base end abuts on the back metal 7A of the brake pad 7 so that the piston 5D is attached. A pair of cut and raised pieces 19 </ b> A and 19 </ b> B are formed as leaf springs that press in the direction of the rotational axis of the disk rotor 2.

  The cut and raised pieces 19A and 19B are loose in the direction in which the base end portion located at the center in the longitudinal direction of the pad shim 19 is separated from the back metal 7A of the brake pad 7 along the radial direction of the disc rotor 2 (see FIG. 2). The front end of the pad shim 19 is bent toward the front end surface of the cylindrical piston 5D fitted into the cylinder portion 5A of the caliper 5 and protrudes from the center portion of the pad shim 19 to both sides thereof. It should be noted that the base end portion, which is the bent portion of the cut and raised pieces 19A and 19B, is set so that it does not overlap with the distal end surface of the cylindrical piston 5D even when the pad shim 19 is slightly moved in the longitudinal direction.

  Such a pad shim 19 has a cylindrical piston 5D fitted into the cylinder portion 5A of the caliper 5 against the moment that the pair of raised and raised pieces 19A and 19B as leaf springs act on the caliper 5 when not braked. Is pressed in the direction of the rotation axis of the disk rotor 2. As a result, the slide pins 4 </ b> A and 4 </ b> B are prevented from tilting toward the cylinder portion 5 </ b> A together with the caliper 5, and the situation in which the slide pins 4 </ b> B come into contact with the guide holes 3 </ b> B of the mounting 3 to cause twisting is suppressed.

  At that time, the spring reaction force of the pair of raised and raised pieces 19A and 19B acts on the central portion of the back metal 7A of the brake pad 7 so that the pad member 7B uniformly contacts the inner rotor surface 2A of the disc rotor 2 with a weak force at all times. Therefore, uneven wear of the pad member 7B is reduced.

  Accordingly, even in the vehicle disc brake device provided with the pad shim 19, the brake squeal phenomenon at the time of non-braking caused by the twisting of the slide pin 4B can be effectively suppressed, and at the time of braking caused by the tilt of the caliper 5. The occurrence of brake vibration can be effectively suppressed. Since uneven wear of the pad member 7B and uneven wear of the inner rotor surface 2A of the disk rotor 2 can be reduced, braking caused by uneven wear of the pad member 7B and uneven wear of the inner rotor surface 2A of the disk rotor 2 is achieved. The occurrence of brake vibration at the time can be effectively suppressed.

  In the pad shim 19 shown in FIG. 10, in order to suppress the tilt of the caliper 5 against the moment acting on the caliper 5, one of the cuts that presses the lower portion of the tip surface of the cylindrical piston 5 </ b> D. The raised piece 19B may be provided, and the other cut and raised piece 19A may be omitted.

  The pair of cut-and-raised pieces 19A and 19B may exhibit substantially the same spring force with substantially the same length and bending angle from the base end to the tip, but the tip of the piston 5D The spring force of the cut-and-raised piece 19B that presses the lower portion of the surface is larger than the spring force of the cut-and-raised piece 19A that presses the upper portion of the front end surface of the piston 5D. The length of the cut and raised piece 19B may be set shorter than the length of the cut and raised piece 19A, or the bending angle of the cut and raised piece 19B may be set larger than the bending angle of the cut and raised piece 19A.

  Furthermore, in the vehicle disc brake device of the present invention, the pad shim 9 on the piston 5D side shown in FIG. 2 can be changed to the pad shim 29 shown in FIGS. The pad shim 29 has a pair of cutting springs as leaf springs that press the piston 5D in the direction of the rotation axis of the disc rotor 2 by abutting the tip of the piston 5D and the base end of the pad shim 29 against the back metal 7A of the brake pad 7. Raised pieces 29A and 29B are formed.

  In the cut-and-raised pieces 29A, 29B, the base end portions located in the vicinity of both ends in the longitudinal direction of the pad shim 29 are separated from the back metal 7A of the brake pad 7 along the radial direction of the disc rotor 2 (see FIG. 2). The front end of the pad shim 29 is bent toward the center of the pad shim 29 toward the front end surface of the piston 5D. In addition, the base end part which is a bending location of the cut-and-raised pieces 29A and 29B is set to a location that does not overlap with the distal end surface of the piston 5D even when the pad shim 29 is slightly moved in the longitudinal direction.

  Such a pad shim 29 presses the tip surface of the piston 5D in the direction of the rotation axis of the disk rotor 2 against the moment that the pair of raised and raised pieces 29A and 29B as leaf springs act on the caliper 5 when not braked. . As a result, the slide pins 4 </ b> A and 4 </ b> B are prevented from tilting toward the cylinder portion 5 </ b> A together with the caliper 5, and the situation in which the slide pins 4 </ b> B come into contact with the guide holes 3 </ b> B of the mounting 3 to cause twisting is suppressed.

  Accordingly, even in the vehicle disc brake device provided with the pad shim 19, the brake squeal phenomenon at the time of non-braking caused by the twisting of the slide pin 4B can be effectively suppressed, and at the time of braking caused by the tilt of the caliper 5. The occurrence of brake vibration can be effectively suppressed. Since the pad member 7B of the brake pad 7 always contacts the inner rotor surface 2A of the disc rotor 2 with a weak force by the action of the spring reaction force by the pair of raised and raised pieces 29A and 29B, the uneven wear of the pad member 7B and The uneven wear of the inner rotor surface 2A of the disk rotor 2 can be reduced, and the occurrence of brake vibration during braking caused by the uneven wear of the pad member 7B and the uneven wear of the inner rotor surface 2A of the disk rotor 2 can be effectively performed. Can be suppressed.

  In the pad shim 29 shown in FIG. 12, in order to suppress the tilt of the caliper 5 against the moment acting on the caliper 5, one cut-and-raised piece that presses the lower portion of the tip surface of the piston 5D. 29B is sufficient, and the other cut and raised piece 29A may be omitted.

  The pair of cut and raised pieces 29A and 29B may exhibit substantially the same spring force with the length from the base end portion to the tip end portion and the bending angle being substantially the same, but the tip end of the piston 5D. The spring force of the cut-and-raised piece 29B that presses the lower portion of the surface is larger than the spring force of the cut-and-raised piece 29A that presses the upper portion of the front end surface of the piston 5D. The length of the cut and raised piece 29B may be shorter than the length of the cut and raised piece 29A, or the bending angle of the cut and raised piece 29B may be set larger than the bending angle of the cut and raised piece 29A.

  The above-described embodiment and its modification are directed to a vehicle disc brake device provided with a so-called floating caliper 5, but the embodiment and its modification are directed to a vehicle disk having a fixed caliper. Even if it is a brake device, if it is a structure where a slide pin inclines with a caliper and a twist arises between the guide holes of a mounting, it is applicable.

1 is a perspective view showing an appearance of a vehicle disc brake device according to an embodiment of the present invention. FIG. 2 is a partial cross-sectional view schematically showing a cross-sectional structure of a caliper of the vehicle disc brake device shown in FIG. 1. FIG. 3 is a front view of one pad shim shown in FIG. 2. It is IV arrow line view of FIG. It is the top view made into the partial cross section which shows schematically the cylinder part and slide pin of the caliper shown in FIG. It is a schematic diagram which shows the behavior at the time of the non-braking of the caliper shown in FIG. FIG. 7 is a schematic diagram corresponding to FIG. 6 illustrating the operation of the pad shim in the vehicle disc brake device of the embodiment. FIG. 4 is a front view corresponding to FIG. 3 showing a modification of the pad shim shown in FIG. 3. It is IX arrow line view of FIG. It is a front view which shows the modification of the other pad shim shown in FIG. It is a XI arrow line view of FIG. It is a front view corresponding to FIG. 10 which shows the modification of the other pad shim shown in FIG. It is a XIII arrow directional view of FIG.

Explanation of symbols

2 Disc rotor 2A Inner rotor surface 2B Outer rotor surface 3 Mounting 3A, 3B Guide hole 4A, 4B Slide pin 5 Caliper 5A Cylinder part 5B Claw part 5C Claw part 5D Piston 6, 7 Brake pad 6A, 7A
6B, 7B Pad member 8 Pad shim 9 Pad shim 18 Pad shim 19 Pad shim 29 Pad shim B Bending position

Claims (4)

A disc brake device in which a caliper that presses the brake pad against the disc rotor is supported so as to be slidable in the direction of the axis of rotation of the disc rotor via a slide pin with respect to the mounting, and a pad shim is attached to the back metal of the brake pad. There,
The pad shim is bent so that the central portion in the longitudinal direction along the circumferential direction of the disk rotor abuts against the back metal of the brake pad, and both side portions thereof function as leaf springs that abut against the pair of upper and lower claws of the caliper, respectively. A disc brake device for a vehicle. The vehicle disc brake device according to claim 1,
Position the upper and lower pair of claw portions on both sides portion of the caliper is folded position abutting Paddoshimu, that closer to the claw portion disposed above the claw portion disposed below one of the upper and lower pair of claw portions of the caliper The disc brake device for vehicles characterized by being set to. A disc brake device in which a caliper that presses the brake pad against the disc rotor is supported so as to be slidable in the direction of the axis of rotation of the disc rotor via a slide pin with respect to the mounting, and a pad shim is attached to the back metal of the brake pad. There,
The Paddoshimu pair of upper and lower claw portions of the caliper, or the tip portion to the upper and lower portions of the front end surface of the piston fitted in the cylinder portion of the caliper contacts respectively, base ends of the brake pad A disc brake device for a vehicle, wherein a pair of cut and raised pieces are formed as leaf springs that respectively contact the back metal. The vehicle disc brake device according to claim 3,
The vehicle disc brake device according to claim 1, wherein the cut and raised pieces protrude from a center portion of the pad shim toward both sides thereof.

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