JP5201071B2 - Disc brake device - Google Patents

Description

  The present invention relates to a disc brake device that brakes a disc rotor that is assembled to a rotating body (for example, an axle hub) and rotates integrally with the rotating body.

  As one of this type of disk brake device, a disk rotor that is assembled to a rotating body and rotates integrally with the rotating body, and an inner housing portion that faces the outer periphery of a part of the disk rotor. An outer housing part is provided, and a pair of end bridge parts connecting these at the rotor circumferential direction end part and a single intermediate bridge part connecting at the rotor circumferential direction intermediate part are provided, and the inner housing part includes And a pair of brakes arranged so as to be able to sandwich the disk rotor and supported so as to be movable in the axial direction of the rotor on a torque receiving portion provided on the caliper at a circumferential end of the rotor. A pad, and a piston that is assembled to the caliper and presses the brake pads toward the disc rotor. When the ton presses the back plate of each brake pad, the lining of each brake pad is slidably pressed against the braked surface of the disk rotor so that the disk rotor is braked. For example, it is described in Patent Document 1 below.

JP 2008-14486 A

  In the disc brake device described in Patent Document 1 described above, the intermediate bridge portion of the caliper is displaced by a predetermined amount to one end bridge portion side between both end bridge portions of the caliper, and outwardly from the rotor diameter. It is formed in a shape bulged by a predetermined amount. Further, the other torque receiving pin provided close to the other end bridge portion of the caliper is detachable from the caliper. For this reason, when the other torque receiving pin is removed from the caliper, the brake pad is detached and attached through the gap between the caliper intermediate bridge portion and the other end bridge portion with the caliper attached to the support. It is possible to exchange.

  In the disc brake device described in Patent Document 1 described above, when the above-described brake pad is attached / detached and replaced, an operation for removing the other torque receiving pin from the caliper and an assembly operation are required. By the way, the other torque receiving pin receives the braking torque applied to the brake pad and transmits it to the caliper. Therefore, the other torque receiving pin needs to be firmly assembled to the caliper, and the above-described operations are not easy.

  Further, in the disc brake device described in Patent Document 1 described above, in order to ensure a necessary and sufficient gap between the intermediate bridge portion of the caliper and the other end bridge portion, the intermediate bridge portion of the caliper is connected to the caliper. It is formed in a shape that is displaced by a predetermined amount between the bridge portions at one end toward the one end bridge portion and bulged by a predetermined amount outward of the rotor diameter. For this reason, the rotor radial direction dimension (outside dimension) of the disc brake device is increased, and the disc brake device is accommodated in the disc wheel of the wheel, and the size restriction is imposed on the accommodated inner diameter of the disc wheel. If there is, there may be a case where a necessary and sufficient clearance cannot be ensured between the intermediate bridge portion of the caliper and the disc wheel.

  In addition, since the intermediate bridge portion of the caliper is provided with a predetermined amount of displacement between the two end bridge portions of the caliper toward the one end bridge portion, one rigidity (for example, the rotor rotation) of the caliper in the circumferential direction of the caliper is provided. Not only is there a difference between the rigidity on the entry side) and the other rigidity (for example, rigidity on the rotor delivery side), but the caliper intermediate bridge portion is formed in a shape that bulges a predetermined amount outward from the rotor diameter. Necessary and sufficient rigidity cannot be obtained between the bridge portions at both ends of the caliper, which may cause uneven wear in the circumferential direction of the lining rotor.

  The present invention has been made to solve the above-described problems. In the above-described disc brake device, the rotor pad in the circumferential direction of the rotor pad opens toward the intermediate bridge portion and extends in the rotor radial direction. In the state where the existing recess is provided, each brake pad is movable in the rotor radial direction with respect to the intermediate bridge portion by a required amount, and the intermediate bridge portion is accommodated in the deepest portion of the recess. Each brake pad is characterized in that it can rotate around the intermediate bridge portion.

  In the disc brake device according to the present invention, the pair of brake pads are arranged so as to be able to sandwich the disc rotor, and are supported so as to be movable in the axial direction of the rotor by a torque receiving portion provided in the caliper at the circumferential end of the rotor. In this state, the intermediate bridge portion of the caliper is not accommodated in the deepest portion of the recess in each brake pad. Therefore, in this state, when the piston presses the back plate of each brake pad, the lining of each brake pad is slidably pressed against the braked surface of the disc rotor, and the braking torque applied to each brake pad is calipered. The disc rotor is braked by the torque receiving portion.

  Further, in the disc brake device according to the present invention, when each brake pad is attached and detached, when each brake pad is moved in the rotor radial direction with respect to the caliper while the caliper is attached to the support body, The intermediate bridge portion of the caliper is housed in the deepest portion of the recess in each brake pad, and each brake pad can rotate around the intermediate bridge portion in the caliper. For this reason, after moving each brake pad by a predetermined amount in the radial direction of the rotor relative to the caliper, each brake pad is rotated with respect to the intermediate bridge portion of the caliper, and further, the recess of each brake pad is set to the intermediate bridge portion of the caliper. It is possible to take out each brake pad from the caliper through the gap in the rotor circumferential direction between the intermediate bridge portion and the end bridge portion in a state where the caliper is attached to the support body. In addition, by performing a work reverse to the work described above, each brake pad after replacement can be attached to the caliper, and each brake pad can be replaced.

  By the way, in the disc brake device according to the present invention, each brake pad can be attached to and detached from the caliper as described above with the caliper attached to the support body. The work of removing the torque receiving portion from the caliper and the work of assembling to the caliper are unnecessary. For this reason, the work required for replacement of each brake pad is easy, and it is possible to easily remove and replace each brake pad.

  Further, in the disc brake device according to the present invention, the concave portion provided in the intermediate portion in the rotor circumferential direction of each brake pad has a shape that opens toward the intermediate bridge portion of the caliper and extends in the rotor radial direction. It is possible to fit the external dimensions of the bridge portion within the external dimensions of the bridge portions at both ends of the caliper. For this reason, the outer dimensions of the disc brake device are not increased by the intermediate bridge portion of the caliper, and the disc brake device is accommodated in the disc wheel of the wheel, and is larger than the accommodated inner diameter of the disc wheel. Even when there are restrictions, it is possible to ensure a necessary and sufficient gap between the intermediate bridge portion of the caliper and the disc wheel.

  In carrying out the above-described present invention, the intermediate bridge portion may be provided at the center in the circumferential direction of the rotor between the both end bridge portions. In this case, it is possible to make the rigidity of one caliper in the circumferential direction of the caliper (for example, rigidity on the rotor feed-in side) and the other rigidity (for example, rigidity on the rotor feed-out side) substantially the same. Therefore, in this case, the above-described effects can be obtained, and uneven wear in the rotor circumferential direction of the lining in each brake pad can be suppressed.

  In carrying out the present invention, a pad wear detector can be detachably provided in the recess. In this case, the pad wear detector can be disposed on each brake pad by effectively utilizing the recesses of each brake pad. Further, since the pad wear detector mounted in the recess of each brake pad is protected on the outer peripheral side by the intermediate bridge portion of the caliper, it is accurately protected from flying objects such as pebbles.

It is the perspective view seen from the rotor outer peripheral side which shows one Embodiment of the disc brake device by this invention. It is the perspective view seen from the inner peripheral side of the disc brake apparatus shown in FIG. FIG. 2 is a perspective view of the disc brake device shown in FIG. 1 with a pad wear detector removed from a brake pad. FIG. 4 is a cross-sectional view showing an inner side in a state where both pad support pins and a pad spring are removed from the disc brake device shown in FIG. 3. FIG. 5 is an enlarged view of a single brake pad shown in FIG. 4. It is the perspective view which showed the state in the process of attaching a pad abrasion detector to the brake pad assembled | attached to the caliper. It is process explanatory drawing which showed the process at the time of attaching / detaching a pad abrasion detector to the brake pad assembled | attached to the caliper. It is the figure which showed the front view (a), side view (b), bottom view (c), top view (d), and perspective view (e) of the pad wear detector shown in FIG. It is process explanatory drawing which showed process (a)-(g) which removes the brake pad of the inner side shown in FIG. 4 from a caliper.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 to 9 show an embodiment in which the disc brake device according to the present invention is implemented in a piston-facing (fixed) disc brake device for a vehicle. The disc brake device DB1 of this embodiment is an axle hub (illustrated). A disc rotor 10 (see a broken line in FIG. 4) that is assembled to a wheel (not shown) and rotated integrally with a wheel (not shown) and a part of the outer peripheral portion of the disc rotor 10 are disposed. The caliper 20 is assembled to the caliper 20 with a total of six pistons 31, 32, 33 (three on the inner side are shown in FIG. 4 and FIG. 9). The inner side brake pad 40 and the outer side brake pad 50 are provided.

  Further, the disc brake device DB1 is assembled to the pair of pad support pins 61, 62 assembled to the caliper 20 and both brake pads 40, 50, and to the right side pad support pin 62 and both brake pads 40, 50 of FIG. A pad spring 70 is provided. The pad spring 70 is provided only on the pad support pin 62 side (rotor unwinding side) on the right side of FIG. 1, but on the pad support pin 61 side (rotor retraction side) on the left side of FIG. It is also possible to implement it.

  The disc rotor 10 has an annular brake surface that can be sandwiched between the lining 42 of the inner brake pad 40 and the lining 52 of the outer brake pad 50. In addition, the disk rotor 10 is configured to be braked in rotation when the braked surface is sandwiched between the lining 42 of the inner brake pad 40 and the lining 52 of the outer brake pad 50 during braking. When the wheel rotates forward, the disk rotor 10 rotates integrally with the wheel in the clockwise direction in FIG. 4, the left side in FIG. 4 is the rotor entry side, and the right side in FIG. 4 is the rotor delivery side. .

  The caliper 20 includes an inner housing portion 21 and an outer housing portion 22 that face each other so as to straddle a part of the outer periphery of the disk rotor 10, and a pair of end bridge portions 23 that connect these at the rotor circumferential end. , 24 and a single intermediate bridge portion 25 connected at the center in the circumferential direction of the rotor. The inner housing portion 21 is disposed on the inner side of the disk rotor 10 and has three cylinders (not shown) that accommodate the pistons 31, 32, and 33.

  Further, as shown in FIG. 4, the inner housing portion 21 has a turn-in side inner peripheral torque receiving portion (engaged with a rotor turn-in side circumferential end portion inner peripheral portion 41 a of the back plate 41 in the inner brake pad 40 ( Pin) 21a, and the inner side brake pad 40 has a turn-in side outer periphery torque receiving portion (wall) 21b that engages with the outer peripheral part 41b of the rotor turn-in side in the circumferential direction of the back plate 41 in the inner side brake pad 40. The inner side torque receiving portion (pin) 21c that engages with the inner peripheral portion 41c of the rotor outlet side of the back plate 41 of the back plate 41, and the rotor outlet side circumferential direction of the back plate 41 of the inner brake pad 40 It has a delivery-side outer peripheral torque receiving portion (wall) 21d that engages with the outer peripheral portion 41d. Further, the inner housing portion 21 has a pair of attachment portions 21e and 21f that extend inwardly of the rotor diameter at the inner end of the rotor diameter, and bolts (not shown) at these attachment portions 21e and 21f. It is comprised so that it may attach to the vehicle body side (support body) using.

  The outer housing portion 22 is disposed on the outer side of the disk rotor 10, and has three cylinders as well as the cylinder (not shown) of the inner housing portion 21, and each torque receiving portion 21 a of the inner housing portion 21. ˜21d, each torque receiving portion that engages with each portion of the back plate 51 in the outer brake pad 50 is provided. For this reason, the outer housing portion 22 has substantially the same configuration as the inner housing portion 21 except that the outer housing portion 22 does not include a pair of attachment portions 21e and 21f.

  The pistons 31, 32, 33 on the inner side and the pistons (not shown) on the outer side are assembled to each cylinder (not shown) so as to be fluid-tight and slidable in the rotor axial direction. The disk rotor 10 is disposed opposite to the disk rotor 10. The pistons 31, 32, 33 on the inner side and the pistons (not shown) on the outer side are supplied from the brake master cylinder to an oil chamber formed between the cylinders when the disk rotor 10 is braked. The inner brake pad 40 and the outer brake pad 50 can be pressed toward the disc rotor 10 in the rotor axial direction by being pushed by the hydraulic oil. The oil chambers communicate with each other through an oil passage 20a (see FIG. 4) provided in the caliper 20.

  The inner side brake pad 40 and the outer side brake pad 50 are comprised by the back plates 41 and 51 and the linings 42 and 52, respectively, and are formed in the same shape. Therefore, the configuration of the inner brake pad 40 will be described in detail below, and the description of the configuration of the outer brake pad 50 will be omitted.

  As shown in FIGS. 1, 4, and 5, the inner brake pad 40 is configured by a back plate 41 and a lining 42 fixed to the back plate 41. Is provided. Moreover, the inner side brake pad 40 is arrange | positioned at the inner housing part 21 side of the caliper 20, and can transmit a braking torque to each torque receiving part 21a, 21b, 21c, 21d of the inner housing part 21 with the back plate 41. It is assembled to.

  The back plate 41 is formed in a flat plate shape, and the horizontal dimension in the state shown in FIG. 9A is set slightly smaller than the distance between the end bridge portions 23 and 24 of the caliper 20, The horizontal dimension in the state shown in FIG. 9F is set smaller than the gap dimension between the end bridge part 24 and the intermediate bridge part 25 of the caliper 20 by a predetermined amount. Further, the back plate 41 has each torque receiving surface that is slidably engaged with each torque receiving portion 21a, 21b, 21c, 21d in the rotor axial direction at the end in the rotor circumferential direction in the state shown in FIG. 41a1, 41b1, 41c1, 41d1 (see FIG. 5).

  Further, a U-shaped notch 41e is provided at the center of the back plate 41 in the circumferential direction of the rotor. In addition, a pair of through holes 41f for inserting the pair of pad support pins 61 and 62 are provided on the outer side in the rotor radial direction of the back plate 41, and a protrusion 41g and an engagement hole 41h for attaching the pad spring 70 are provided. Are provided in pairs.

  The lining 42 is formed in a substantially sector shape so as to extend in the circumferential direction of the rotor, and the pistons 31, 33, 33 press against the back plate 41, so that the lining 42 is slidably pressed against the braked surface of the disk rotor 10. Thus, the disk rotor 10 can be braked. Further, the lining 42 is provided with a U-shaped notch 42a at the center in the circumferential direction of the rotor. The notch 42a of the lining 42 is overlapped with the notch 41e of the back plate 41 in the rotor axial direction, and a recess 43 is formed by these notches 41e and 42a.

  The recess 43 opens toward the intermediate bridge portion 25 of the caliper 20 and extends a predetermined amount in the rotor radial direction (vertical direction in FIG. 4), and the inner brake pad 40 has a rotor diameter with respect to the intermediate bridge portion 25. The required amount can be moved in the direction. The length (depth) of the recess 43 in the rotor radial direction is set in advance to a predetermined value in consideration of the shape of the back plate 41, and as shown in FIG. In the state accommodated in the deepest portion 43, the inner brake pad 40 can rotate around the intermediate bridge portion 25 as shown in FIGS. That is, in this embodiment, the shortest distance from the rotation center (center of the intermediate bridge portion 25) of the inner brake pad 40 to the end bridge portions 23 and 24 in the state shown in FIGS. The dimensions of each part of the inner brake pad 40 are such that the back plate 41 and the lining 42 of the inner brake pad 40 are accommodated in a circle having a radius R (see the phantom line in FIG. 9E). Is set.

  In addition, a pair of convex portions 41e1 (see FIGS. 5 and 7) for assembling the pad wear detector 80 in a detachable manner is provided at the notch 41e portion of the concave portion 43. Each convex portion 41e1 is provided at the deepest portion of the notch 41e and extends along the rotor radial direction. As shown in FIG. 7, the pad wear detector 80 has a pair of engaging grooves 81. Can be engaged and disengaged.

  As shown in FIG. 7, the pad wear detector 80 passes through the gap between the intermediate bridge portion 25 of the caliper 20 and the inner brake pad 40 when the inner brake pad 40 is assembled to the caliper 20. The back plate 41 can be detached from the notch 41e. The pad wear detector 80 is formed in the shape shown in FIG. 8 and is used together with a warning lamp (not shown) or the like. When the lining 42 reaches the wear limit, the detection unit 82 becomes the disk rotor 10. It is possible to inform the driver of the replacement time of the inner brake pad 40 by energizing the motor in contact with.

  The pad support pins 61 and 62 are removably assembled to mounting holes provided in the caliper 20 and through holes (41f) provided in the back plates 41 and 51 of the brake pads 40 and 50, respectively. It is prevented by 64. The pad spring 70 is for elastically urging both the brake pads 40, 50 in the rotor radial direction, while elastically separating both the brake pads 40, 50 in the rotor axial direction. The pad support pins 62 and the back plates 41 and 51 of the brake pads 40 and 50 are assembled. The pad spring 70 and the pad support pins 61 and 62 are configured to be easily removable from the outside of the caliper 20 rotor diameter while the caliper 20 is attached to the support body.

  In the disc brake device DB1 of this embodiment configured as described above, the pair of brake pads 40, 50 are arranged so as to be able to sandwich the disc rotor 10, and each of the calipers 20 provided at the end in the circumferential direction of the rotor. When the torque receiving portions (21a and 21b or 21c and 21d) are supported so as to be movable in the rotor axial direction, the intermediate bridge portion 25 of the caliper 20 is the deepest portion of the recess (43) in each brake pad 40, 50. Is not housed. Therefore, in this state, when the pistons (31, 32, 33) press the back plates 41, 51 of the brake pads 40, 50, the linings 42, 52 of the brake pads 40, 50 are covered with the disc rotor 10. While being slidably pressed against the braking surface, the braking torque applied to each brake pad 40, 50 is received by each torque receiving portion (21a and 21b or 21c and 21d) of the caliper 20, and the disc rotor 10 is braked. Is done.

  Further, in the disc brake device DB1 of this embodiment, each brake pad 40, 50 is attached to the caliper 20 in a state where the caliper 20 is attached to the support body when the brake pads 40, 50 are attached and detached. When moved outward in the rotor radial direction, as illustrated in FIG. 9B, the intermediate bridge portion 25 of the caliper 20 is accommodated in the deepest portion of the recess (43) in each brake pad 40, 50. Thus, the brake pads 40 and 50 can rotate around the intermediate bridge portion 25 in the caliper 20.

  For this reason, after each brake pad 40, 50 is moved by a predetermined amount in the outer diameter direction of the rotor with respect to the caliper 20, as illustrated in FIGS. 9B to 9E, each brake pad 40, 50 is It rotates with respect to the intermediate bridge portion 25 of the caliper 20, and further, as illustrated in FIGS. 9 (f) and 9 (g), the recess (43) of each brake pad 40, 50 is formed in the intermediate bridge portion of the caliper 20. The brake pads 40 and 50 are taken out from the caliper 20 through the rotor circumferential clearance between the intermediate bridge portion 25 and the end bridge portion 24 in a state where the caliper 20 is assembled to the support by being removed from the caliper 25. Is possible. In addition, by performing a work reverse to the work described above, the brake pads 40 and 50 after replacement can be attached to the caliper 20, and the brake pads 40 and 50 can be exchanged.

  By the way, in the disc brake device DB1 of this embodiment, each brake pad 40, 50 can be attached to and detached from the caliper 20 as described above with the caliper 20 still attached to the support. When the brake pads 40 and 50 are replaced, the work of removing the torque receiving portions (21a to 21d) of the caliper 20 from the caliper 20 and the work of assembling the caliper 20 are unnecessary. For this reason, the work required for the replacement of the brake pads 40 and 50 is easy, and the attachment and detachment replacement of the brake pads 40 and 50 can be easily performed.

  Further, in the disc brake device DB1 of this embodiment, a recess (43) provided at the center in the rotor circumferential direction of each brake pad 40, 50 opens toward the intermediate bridge portion 25 of the caliper 20 and extends in the rotor radial direction. Therefore, the outer dimensions of the intermediate bridge portion 25 of the caliper 20 can be accommodated within the outer dimensions of both end bridge portions 23 and 24 of the caliper 20. For this reason, the outer dimensions of the disc brake device DB1 are not increased by the intermediate bridge portion 25 of the caliper 20, and the disc brake device DB1 is accommodated in the disc wheel of the wheel. Even when there is a size restriction on the inner diameter, it is possible to ensure a necessary and sufficient gap between the intermediate bridge portion 25 of the caliper 20 and the disk wheel.

  Moreover, in the disc brake device DB1 of this embodiment, the intermediate bridge portion 25 of the caliper 20 is provided at the center in the rotor circumferential direction between the both end bridge portions 23 and 24. For this reason, it is possible to make the one rigidity (for example, the rigidity of the rotor feed-in side) and the other rigidity (for example, the rigidity of the rotor feed-out side) of the caliper 20 substantially the same. Therefore, uneven wear in the rotor circumferential direction of the linings 42 and 52 in each brake pad 40 and 50 can be suppressed. Further, since the position of the intermediate bridge portion 25 in the caliper 20 in the radial direction of the rotor is close to the outer periphery of the disk rotor 10, the intermediate bridge portion 25 effectively connects the inner housing portion 21 and the outer housing portion 22. The caliper 20 is effectively reinforced by the intermediate bridge portion 25.

  In the disc brake device DB1 of this embodiment, a pad wear detector 80 is detachably provided in the recess (43) of each brake pad 40, 50. For this reason, it is possible to arrange the pad wear detector 80 in each brake pad 40, 50 by effectively utilizing the recess (43) of each brake pad 40, 50. Further, since the pad wear detector 80 mounted in the recess (43) of each brake pad 40, 50 is protected on the outer peripheral side by the intermediate bridge portion 25 of the caliper 20, it is accurately protected from flying objects such as pebbles. The

  In the above-described embodiment, the intermediate bridge portion 25 of the caliper 20 is configured to be provided at the center in the circumferential direction of the rotor between the both end bridge portions 23 and 24. However, the intermediate bridge portion 25 of the caliper 20 has both end portions. It is also possible to configure and implement such that the bridge portions 23 and 24 are displaced by a predetermined amount on either side. In addition, the pad wear detector 80 is configured to be detachably provided in the recess (43) of each brake pad 40, 50. However, the pad wear detector 80 is configured not to be provided. It is also possible.

  In the above-described embodiment, the inner brake pad 40 and the outer brake pad 50 are configured to be supported by the caliper 20 using a pair of pad support pins 61 and 62 and a pad spring 70. Although implemented, the support structure with respect to the caliper of an inner side brake pad and an outer side brake pad can be changed suitably, and is not limited to the said embodiment.

  In the above-described embodiment, the caliper 20 includes the inner housing portion 21 and the outer housing portion 22 that are opposed to each other across a part of the outer peripheral portion of the disk rotor 10, and a pair of end bridge portions 23 that connect them. , 24 and a single intermediate bridge portion 25, which are integrally formed, but the caliper inner housing portion and outer housing portion are divided into two in the rotor axial direction. And it is also possible to employ a caliper constituted by connecting these with a plurality of connecting bolts.

  Further, in the above-described embodiment, the cylinder formed in the inner housing portion 21 and the outer housing portion 22 of the caliper 20 and the piston assembled to the cylinder are each configured to be three, The number of cylinders formed on the inner housing portion and the outer housing portion of the caliper and the number of pistons assembled thereto may be one or two, respectively, and can be changed as appropriate, and are limited to the above embodiment. It is not something.

DB1 ... disc brake device, 10 ... disc rotor, 20 ... caliper, 21 ... inner housing part, 21a-21d ... torque receiving part, 22 ... outer housing part, 23, 24 ... end bridge part, 25 ... intermediate bridge part, 31, 32, 33 ... piston, 40 ... inner side brake pad, 50 ... outer side brake pad, 41, 51 ... back plate, 42, 52 ... lining, 43 ... recess, 80 ... pad wear detector

Claims (3)

A disk rotor that is assembled to the rotating body and rotates integrally with the rotating body;
The disk rotor includes an inner housing portion and an outer housing portion that face each other so as to straddle a part of the outer periphery, and a pair of end bridge portions that connect these at the rotor circumferential end portion and a rotor circumferential intermediate portion. A caliper that has a single intermediate bridge portion to be connected to each other and is assembled to a support body at the inner housing portion;
A pair of brake pads that are arranged so as to be able to sandwich the disk rotor and are supported so as to be movable in the axial direction of the rotor by a torque receiving portion provided in the caliper at the circumferential end of the rotor;
A piston that is assembled to the caliper and presses the brake pads toward the disc rotor;
When the piston presses the back plate of each brake pad, the lining of each brake pad is slidably pressed against the braked surface of the disk rotor so that the disk rotor is braked. Disc brake device
A concave portion that opens toward the intermediate bridge portion and extends in the rotor radial direction is provided in the rotor circumferential intermediate portion of each brake pad, and each brake pad is in the rotor radial direction with respect to the intermediate bridge portion. A disc brake device characterized in that each brake pad can rotate around the intermediate bridge portion when the intermediate bridge portion is accommodated in the deepest portion of the recess. .   2. The disc brake device according to claim 1, wherein the intermediate bridge portion is provided at a center in a circumferential direction of the rotor between the both end bridge portions.   2. The disc brake device according to claim 1, wherein a pad wear detector is detachably provided in the recess.

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