JP2013113420A - Disk brake - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk brake capable of bringing about productivity improvement.SOLUTION: A friction pad 6 consists of a lining 75 that is kept in contact with a disk, and a backing plate 78 in which the lining 75 is stuck to a lining sticking face 76 while a pressing force from a pressing means is transmitted to a pressing force transmitting face 77. Out of the ends of a shim plate 7, the one located in the radial direction of the disk slightly to the outside has a locking claw 102 formed thereat. The locking claw 102 has a contact part 117 formed at its tip end side extending along the lining sticking face 76 of the backing plate 78, to come in contact with the lining sticking face 76, while at its base end side, a swelled part 130 is formed expanding in the direction of moving away from the pressing force transmitting face 77 of the backing plate 78.

Description

  The present invention relates to a disc brake for braking a vehicle.

  There is a disc brake for braking a vehicle in which a shim plate disposed on the back surface of the friction pad is locked to the friction pad (for example, see Patent Document 1).

Japanese Patent Laid-Open No. 10-318301

  Since the shim plate is locked to the friction pad with a tightening margin in the radial direction of the disk, it is necessary to manufacture a shim and a friction pad for managing the accuracy of the tightening margin. There is a problem that it is difficult to improve productivity.

  An object of this invention is to provide the disc brake which can improve productivity.

  In order to achieve the above object, according to the present invention, the locking claw of the shim plate is formed with a contact portion extending along the lining application surface of the back plate on the distal end side and contacting the lining application surface. The bulging part which swells in the direction away from the pressing force transmission surface of the said back plate is formed in the side.

  According to the present invention, the productivity of the disc brake can be improved.

It is a top view which shows the disc brake of 1st Embodiment which concerns on this invention. It is a front view which shows the disc brake of 1st Embodiment which concerns on this invention. 1 is a side sectional view showing a disc brake of a first embodiment according to the present invention. FIG. 3 shows the engagement state of the friction pad and shim plate of the disc brake of the first embodiment according to the present invention, wherein (a) is a plan view, (b) is a front view, and (c) is a view of (b). X1-X1 sectional drawing, (d) shows a rear view, respectively. 1 shows a shim plate of a disc brake according to a first embodiment of the present invention, in which (a) is a plan view, (b) is a front view, (c) is a bottom view, and (d) is a rear view. , (E) shows side views, respectively. The engagement state of the friction pad and shim board of the disc brake of 2nd Embodiment which concerns on this invention is shown, (a) is a top view, (b) is a front view, (c) is (b). X2-X2 sectional drawing and (d) show a rear view, respectively. FIG. 2 shows a shim plate of a disc brake according to a second embodiment of the present invention, wherein (a) is a plan view, (b) is a front view, (c) is a bottom view, and (d) is a rear view. , (E) shows side views, respectively.

“First Embodiment”
A first embodiment according to the present invention will be described below with reference to FIGS.

  The disc brake of the first embodiment is a disc brake for vehicles, specifically for motorcycles. As shown in FIGS. 1 to 3, the disc brake 1 includes a disc 2, a carrier 3, and a caliper 4 supported by the carrier 3 so as to straddle the disc 2. Further, as shown in FIG. 3, the disc brake 1 includes two friction pads 5 and 6, a pair of shim plates 7 and 7 having the same shape, a pad spring 9, and a boot 11. Furthermore, as shown in FIG. 1 and 2 indicate the rotation direction of the disk 2 when the vehicle moves forward, and the following description will be made with the inlet side in this rotation direction as the disk inlet side and the outlet side as the disk outlet side. I do. Further, the axial direction of the disk 2 is the disk axial direction, the radial direction of the disk 2 is the radial direction of the disk, and the rotational direction of the disk 2 is the rotational direction of the disk or the circumferential direction of the disk.

  As shown in FIGS. 1 and 2, the disk 2 has a disk shape, and is provided on a wheel (not shown) of a vehicle that is a braking target of the disk brake 1 and rotates integrally with the wheel.

  The carrier 3 includes a mounting bracket 15 shown in FIGS. 1 to 3, a guide pin 16 shown in FIG. 3 fixed integrally with the mounting bracket 15, and a torque receiving pin shown in FIG. 1 fixed integrally with the mounting bracket 15. 17.

  As shown in FIG. 1, the mounting bracket 15 is disposed on the outer side (the side opposite to the wheel) that is one side of the disk 2 and is fixed to a non-rotating part (specifically, a front fork) of the vehicle. It is. As shown in FIG. 2, the mounting bracket 15 includes a base portion 21 extending in the disc rotation direction, and a radially extending portion extending outward in the disc radial direction from the end portion of the base portion 21 on the disc delivery side. 22. A mounting hole 23 is formed in the base portion 21 at an end portion on the disk delivery side, and an attachment hole 24 is formed at an intermediate position on the disk delivery side so as to penetrate in the disk axial direction. The carrier 3 is fixed to the non-rotating portion of the vehicle by mounting bolts (not shown) in the mounting holes 23 and 24 described above.

  In the mounting bracket 15, a guide pin mounting hole 28 is formed at the end of the base portion 21 on the disk insertion side so as to penetrate in the disk axial direction as shown in FIG. 3. Further, as shown in FIG. 1, the mounting bracket 15 is formed with a torque receiving pin mounting hole 29 penetrating in the disk axial direction at the outer end of the radial extending portion 22 in the disk radial direction.

  As shown in FIG. 3, the guide pin 16 includes a fixed shaft portion 32, a flange portion 33 having a larger diameter than the fixed shaft portion 32, and a guide shaft portion 34 having a smaller diameter than the flange portion 33 in order from one end in the axial direction. Have. The fixed pin portion 32 of the guide pin 16 is fitted and fixed to the guide pin mounting hole 28 of the mounting bracket 15 so as to protrude to the opposite side (outer side) of the disk 2 as a whole. In this state, the guide pin 16 protrudes from the mounting bracket 15 to the opposite side of the disk 2 along the disk axial direction.

  As shown in FIG. 1, the torque receiving pin 17 includes a torque receiving shaft portion 38, a fixed shaft portion 39, and a guide shaft portion 40 in order from one end in the axial direction. The torque receiving pin 17 has a fixed shaft 39 fitted and fixed in the torque receiving pin mounting hole 29 of the mounting bracket 15. When the torque receiving pin 17 is attached to the mounting bracket 15 as described above, the center of the torque receiving pin 17 is arranged on the outer side in the radial direction with respect to the disk 2. The 38 side extends over the disk 2 to the disk 2 side, and the other guide shaft part 40 side extends to the opposite side of the disk 2. The torque receiving pin 17 is disposed on the disk delivery side of the carrier 3, and is disposed on the disk delivery side and on the outer side in the disk radial direction with respect to the guide pin 16, as shown in FIG.

  The caliper 4 is slidable in the disk axial direction with respect to the carrier 3 by the guide shaft portion 40 of the torque receiving pin 17 as shown in FIG. 1 and the guide shaft portion 34 of the guide pin 16 as shown in FIG. It is a so-called pin slide type caliper. As shown in FIG. 2, the caliper 4 includes a caliper body 45, two pistons (pressing means) 46 and 46, and a pad pin 47.

  The caliper body 45 is formed by being integrally formed by casting from an aluminum alloy or the like, and then being cut. As shown in FIG. 1 to FIG. 1 and the guide pin 16 shown in FIG. 3 are slidably attached. The caliper body 45 includes a cylinder portion 50 disposed on the outer side of the carrier 3, a bridge portion 51 extending from the outer side of the cylinder portion 50 in the radial direction of the disk to the outer side in the radial direction of the disc 2, and a bridge A claw portion (pressing means) 52 extending radially inward of the disk 2 so as to face the cylinder portion 50 from the inner end of the portion 51 is provided.

  As shown in FIG. 2, a sliding guide portion 56 is formed in the cylinder portion 50 so as to protrude inward in the disk radial direction from an intermediate position in the disk circumferential direction. A sliding guide portion 57 is formed so as to protrude to the outlet side. A guide pin support hole 58 shown in FIG. 3 is formed in the sliding guide portion 56 so as to penetrate in the disk axial direction. A torque receiving pin support hole 59 is provided in the slide guide portion 57 shown in FIG. It is formed from the 2 side to the midway position in the disk axial direction.

  As shown in FIG. 3, the above-described boot 11 is fitted in the guide pin support hole 58 of the cylinder portion 50, and the sliding guide portion 56 is connected to the guide shaft portion of the guide pin 16 via the boot 11. 34 is slidably supported. As shown in FIG. 1, the guide shaft portion 40 of the torque receiving pin 17 is fitted in the torque receiving pin support hole 59 of the cylinder portion 50, and the sliding guide portion 57 is connected to the torque receiving pin 17. The guide shaft portion 40 is slidably supported.

  Note that the sliding guide portion 56 and the sliding guide portion 57 perform sliding guidance by inserting the guide pin 16 and the torque receiving pin 17 into the inside, but the sliding guide portion 56 is not limited thereto. Alternatively, the sliding guide portion 57 may have a pin shape, and a hole for slidably fitting these may be provided on the carrier 3 side.

  The boot 11 shown in FIG. 3 is made of rubber, and covers the flange portion 33 and the guide shaft portion 34 of the guide pin 16. The boot 11 includes a locking portion 62 that is locked to the flange portion 33 of the guide pin 16, a telescopic bellows portion 63, a cylindrical portion 64 that is fitted into the guide pin support hole 58, and a guide shaft portion 34. And a lid portion 65 that covers the opposite side of the flange portion 33. The boot 11 is fitted and held in the guide pin support hole 58 of the caliper 4 by the cylindrical portion 64 and the guide shaft portion 34 of the guide pin 16 of the carrier 3 is slidably fitted inside the cylindrical portion 64. Let The bellows portion 63 extends and contracts between the sliding guide portion 56 of the caliper 4 and the mounting bracket 15.

  The boot 12 shown in FIG. 1 is also made of rubber and covers the space between the mounting bracket 15 of the guide shaft portion 40 of the torque receiving pin 17 and the sliding guide portion 57 of the caliper 4. The boot 12 has an accordion shape so as to be stretchable.

  As described above, the caliper body 45 is supported by the guide pins 16 and the torque receiving pins 17 provided on the carrier 3 so as to be slidable along the disk axial direction.

  As shown in FIGS. 2 and 3, two bottomed bores 68, 68 are arranged in the disc rotation direction along the disc axial direction so as to open toward the claw portion 52 side in the cylinder portion 50. Is formed. As shown in FIG. 2, a pipe connection hole 69 communicating with these bores 68 and 68 is formed along the disk radial direction, and a brake pipe (not shown) is connected to the pipe connection hole 69. Is done. Further, an air bleeding bleeder plug 70 communicating with the bore 68 is attached to the disk delivery side of the cylinder portion 50.

  As shown in FIG. 2, the pistons 46 and 46 are slidably fitted into the bores 68 and 68 of the cylinder portion 50. In this fitted state, the pistons 46 and 46 are arranged side by side with respect to the caliper body 45 in the disk rotation direction.

  As shown in FIGS. 1 and 2, on the bridge portion 51 side in the disc axial direction of the cylinder portion 50, a turn-in side projecting portion 71 projecting toward the disc feed-in side on the outer side in the disc radial direction is formed. On the bridge portion 51 side in the disc axial direction of the portion 52, a turn-in side projecting portion 72 is formed on the outer side in the disc radial direction so as to project toward the disc feed-in side.

  As shown in FIG. 1, the pad pin 47 is fitted into a through hole (not shown) extending in the disc axial direction provided in the turn-in side protrusion 71 and the turn-in side protrusion 72 of the caliper body 45. In this fitted state, it extends between the turn-in side protrusion 71 and the turn-in side protrusion 72. The pad pins 47 are arranged along the disk axial direction, straddling the disk 2 on the disk radial direction outside of the disk 2 and on the disk insertion side of the bridge portion 51.

  The friction pads 5 and 6 are disposed on both surfaces of the disk 2 and are supported by the torque receiving shaft portion 38 of the torque receiving pin 17 and the pad pin 47. As shown in FIG. 3, the friction pad 5 is disposed on the outer side, that is, the piston 46 side, which is one side of the disk 2, and is pressed by the piston 46. The friction pad 6 is disposed on the inner side, that is, the claw portion 52 side, which is the other surface side of the disk 2, and is pressed by the claw portion 52. Each of the friction pads 5 and 6 has a lining 75 that abuts against the disk 2 to generate a frictional resistance, and the lining 75 is affixed to the lining affixing surface 76, so There is a back plate 78 through which pressure is transmitted to a pressing force transmission surface 77 opposite to the lining application surface 76.

  One of the pair of shim plates 7 and 7 is located between a piston 46 provided on the caliper 4 and a pressing force transmission surface 77 of one friction pad 5 pressed against the disk 2 by the piston 46. It is locked to this one friction pad 5. The other of the pair of shim plates 7, 7 is between a claw portion 52 provided on the caliper 4 and a pressing force transmission surface 77 of the other friction pad 6 pressed against the disk 2 by the claw portion 52. Located on the other friction pad 6. A sheet material 80 is affixed to each of the shim plates 7 and 7 on the back plate 78 side, and the sheet material 80 abuts against the pressing force transmission surface 77 of the back plate 78.

  Since the friction pad 5 and the friction pad 6 described above have the same configuration except that they have a substantially symmetrical shape in the disk rotation direction, in the following, the friction pad 6 on one claw portion 52 side and the friction pad 6 are engaged with this. The shim plate 7 will be described as an example.

  As shown in FIG. 4, the back plate 78 of the friction pad 6 includes a main plate portion 81 to which the lining 75 is fixed, and a disc outlet side on the outer side in the disc radial direction of the main plate portion 81 (upper side in FIG. 4B). From the left side of FIG. 4B, an end protrusion 82 that protrudes obliquely outward in the disk radial direction and the disk radial side, and the disk inlet side of the main plate 81 in the radial direction of the disk (FIG. 4 ( From b) on the right side, an end projecting portion 83 projecting obliquely outward in the disk radial direction and in the disk radial direction is provided.

  The outer edge of the main plate 81 in the radial direction of the disk is an arc-shaped outer edge surface 87 that protrudes outward in the radial direction of the disk, and the back plate 78 is formed on the end protrusion 82 side of the outer edge surface 87 and A pair of projecting portions 85 and 85 projecting radially outward from the end projecting portion 83 side are provided. The inner edge of the main plate 81 in the radial direction of the disk is an arcuate inner edge 88 having a concave in the radial direction of the disk in the middle of the disk rotation direction. The pair of inclined surface portions 89 and 89 are inclined so as to be positioned on the outer side in the radial direction of the disk as they are separated in the disk rotation direction. The outer edge surface portion 87, the inner edge surface portion 88, and the inclined surface portions 89 and 89 are along the disk axial direction.

  An insertion hole 94 having a square shape with rounded corners approximating a square shape is formed in the end protruding portion 82 on the disk delivery side so as to penetrate in the disk axial direction. The torque receiving shaft portion 38 of the torque receiving pin 17 is inserted into the insertion hole 94 on the disk delivery side of the friction pad 6.

  A long engagement hole 95 is formed in the end protrusion 83 so as to penetrate in the disk axial direction along the disk circumferential direction. The pad pin 47 is inserted into the engagement hole 95 on the disk insertion side of the friction pad 6.

  The back plate 78 is formed by punching a steel plate having a certain thickness in the thickness direction by press forming. The outer edge surface portion 87, the inner edge surface portion 88, and the inclined surface portion 89 are arranged along the plate thickness direction. 89 are shearing surfaces for press molding.

  As shown in FIG. 5, the shim plate 7 is centered on a disk radial direction line (hereinafter referred to as a center radial line) passing through the center of the disk rotation direction (the left-right direction in FIGS. 5A to 5D). It has a mirror-symmetric shape, a flat main plate portion 101, a pair of locking claws 102 and 102 formed at both ends of the main plate portion 101 in the disk rotation direction, and the main plate portion 101 outside the disk radial direction. (Upper side of FIGS. 5 (b) and 5 (d)), a pair of outer regulating claws 103, 103 formed apart from each other in the disk rotation direction, and the inner side in the disk radial direction of the main plate 101 (FIG. 5 (b), On the lower side of (d), there is a pair of inner regulating claws 104, 104 formed apart from each other in the disk rotation direction.

  The pair of locking claws 102, 102 is formed as a whole at the end portion of the shim plate 7 that is positioned on the outer side in the disk radial direction. The pair of locking claws 102, 102 is identical to the main plate portion 101 on the opposite side of the main plate portion 101 in the disk rotation direction from the intermediate position in the disk radial direction of the corresponding side edge portion of the main plate portion 101 in the disk rotation direction. A planar substrate portion 114 protruding in a plane, and an outer edge of the substrate portion 114 in the radial direction of the disk outward in the radial direction of the disk. ) And a planar extending plate portion 115 extending obliquely so as to be positioned at the other end of the extending plate portion 115 opposite to the substrate portion 114 from the other side in the disk axial direction (FIG. 5E The flat intermediate plate 116 extending to the left side of) and the end of the intermediate plate 116 opposite to the extended plate 115 extends inward in the disk radial direction in parallel with the main plate 101. Planar contact plate portion (contact portion) 117 and contact plate portion 1 7 has a flat front end plate portion 118 extending obliquely inwardly in the radial direction of the disc from the end opposite to the intermediate plate portion 116 and inwardly in the disc axial direction. doing. When viewed from the disk axial direction, the extension plate portion 115, the contact plate portion 117, and the tip plate portion 118 are parallel to the above-described central radius line. Further, the intermediate plate portions 116, 116 of the pair of locking claws 102, 102 are arranged on the same plane.

  The pair of outer regulating claws 103, 103 are respectively an outer projecting plate portion 121 projecting in the same plane as the main plate portion 101 from the outer side in the disc radial direction of the main plate portion 101, and an outer projecting plate portion 121. The outer restricting plate portion 122 protrudes from the end opposite to the main plate portion 101 to the other side in the disk axial direction.

  The pair of inner restricting claws 104 and 104 are respectively an inner projecting plate portion 125 projecting in the same plane as the main plate portion 101 from the inner side in the disc radial direction of the main plate portion 101 to the inner side in the disc radial direction, and the inner projecting plate portion 125. It has an inner regulating plate portion 126 that protrudes from the end opposite to the main plate portion 101 to the other side in the disk axial direction.

  Here, in the extending direction of the central radial line, the outer end position of the locking claw 102, that is, the position of the intermediate plate portion 116 is more discreet than the outer end position of the outer restricting claw 103, that is, the position of the outer restriction plate portion 122. Located radially inward. Further, the distance between the pair of outer restricting claws 103 and 103 is wider than the distance between the pair of inner restricting claws 104 and 104.

  Such a shim plate 7 is locked to the friction pad 6 as shown in FIG. At this time, the back plate 78 is interposed between the substrate portions 114 and 114 and the extension plate portions 115 and 115 of the pair of locking claws 102 and 102 and the contact plate portions 117 and 117 and the tip plate portions 118 and 118. Inserted. In this locked state, the shim plate 7 faces the pressing force transmission surface 77 of the back plate 78 so that the main plate portion 101 and the substrate portions 114 and 114 cover the main plate portion 81 of the friction pad 6. The sheet material 80 affixed to the portion 101 contacts the pressing force transmission surface 77. Further, the extension plate portions 115 and 115 face the pressing force transmission surface 77 while being inclined so as to be separated from the pressing force transmission surface 77 in the disk axial direction toward the opposite side to the substrate portions 114 and 114. The intermediate plate portions 116, 116 are opposed to the outer edge surface portion 87 of the back plate 78, and the contact plate portions 117, 117 extend in parallel with the lining paste surface 76 of the back plate 78, so It will contact by surface contact. In addition, the front end plate portions 118 and 118 extend obliquely in a direction away from the lining application surface 76.

  Further, in the above-described locked state, the outer restriction plate portions 122 and 122 of the pair of outer restriction claws 103 and 103 are opposed to the outer edge surface portion 87 of the back plate 78, so that the pair of inner restriction claws 104 and 104 The inner restricting plate portions 126 and 126 face the inner edge surface portion 88 of the back plate 78 to restrict the movement of the shim plate 7 in the disk radial direction.

  Further, in the above-described locked state, the extending plate portions 115 and 115 and the intermediate plate portions 116 and 116 are partially separated from the pressing force transmission surface 77 of the back plate 78 on the extending plate portions 115 and 115 side. The bulging portions 130 and 130 are bent so as to swell. The bulging portions 130 and 130 are formed on the base end side of the pair of locking claws 102 and 102, and the contact plate portions 117 and 117 described above are formed on the distal end sides of the pair of locking claws 102 and 102. Is formed.

  According to the first embodiment described above, the shim plate 7 is brought into contact with the pressing force transmission surface 77 of the back plate 78 with the sheet material 80 affixed to the main plate portion 101, and the front ends of the locking claws 102, 102. The abutting plate portions 117 and 117 abut against the lining sticking surface 76 of the back plate 78. The bulging portions 130 and 130 that swell in the direction away from the pressing force transmission surface 77 on the proximal end side of the locking claws 102 and 102 give an appropriate urging force to the contact plate portions 117 and 117. .

  As described above, since the locking claws 102 and 102 are locked to the lining sticking surface 76 and the pressing force transmitting surface 77 where the dimensional accuracy of the back plate 78 is relatively high and the surface roughness is fine, the back plate 78 is sheared. Compared with the case where the outer edge surface part 87 and the inner edge surface part 88 are relatively flat and have a relatively low dimensional accuracy and a rough surface roughness, the tightening margin can be managed more easily. In addition, since the bending dimensions of the locking claws 102 and 102 can be made longer, the spring constant becomes smaller, and the tightening allowance can be easily managed from this point. Therefore, the productivity of the disc brake 1 can be improved. Further, variation in assembling property can be suppressed.

  Moreover, since the spring constant of the latching claws 102 and 102 can be made small, the reliability with respect to breakage improves. In addition, since there is a margin in the disk axial direction, the degree of adhesion of the shim plate 7 to the back plate 78 can be increased. Therefore, the feeling of brake operation can be improved and drag can be reduced. In addition, since the front end plate portion 118 extends with the lining sticking surface 76 as a reference, the tip plate portion 118 accurately functions as a wear sensor that contacts the disk 2 and generates sound when the lining 75 wears over a predetermined amount.

  In the above description, the friction pad 6 on the claw portion 52 side and the one shim plate 7 locked to the friction pad 6 have been described as examples. However, the friction pad 5 on the piston 46 side and the other shim locked to the friction pad 5 are described. The same applies to the plate 7.

“Second Embodiment”
Next, the second embodiment will be described mainly with reference to FIGS. 6 and 7 focusing on the differences from the first embodiment. In addition, about the site | part which is common in 1st Embodiment, it represents with the same name and the same code | symbol.

  In the second embodiment, two friction pads and a pair of shim plates, which are partially different from the first embodiment, are used. Also in the second embodiment, as in the first embodiment, one friction pad 6A on the claw portion 52 side and one shim plate 7A locked to the friction pad 6A will be described as an example.

  As shown in FIG. 6, the back plate 78A of the friction pad 6A has a pair of locking projections 100A that project radially outward from both outer sides of the pair of projections 85, 85 of the outer edge surface portion 87 in the disk rotation direction. , 100A.

  As shown in FIG. 7, the shim plate 7 </ b> A has a mirror-symmetric shape around the central radial line as in the first embodiment, and has a main plate portion 101 and a pair of outer regulation similar to those in the first embodiment. Claws 103, 103 and a pair of inner regulating claws 104, 104 are provided. The shim plate 7A of the second embodiment is different from the first embodiment in a pair of locking claws 102A and 102A formed at both ends of the main plate portion 101 in the disk rotation direction.

  The pair of locking claws 102A and 102A as a whole is also formed at the end portion of the shim plate 7A located on the outer side in the disk radial direction. The pair of locking claws 102A and 102A are identical to the main plate portion 101 on the opposite side of the main plate portion 101 in the disk rotation direction from the intermediate position in the disk radial direction of the corresponding side edge portion of the main plate portion 101 in the disk rotation direction. A flat substrate portion 114A protruding in a plane, and a disk radial direction outward from the outer edge of the substrate portion 114A in the disk radial direction, outward one side in the disk axial direction (right side in FIG. 5 (e)) The extending plate portion 115A that extends obliquely so as to be located at the outer edge of the extending plate portion 115A on the side of the outer regulating claw 103 on the opposite side of the substrate portion 114 from the other side in the disk axial direction (FIG. 5). A flat intermediate plate portion 116A extending to the left side of (e) and the main plate portion 101 from the end of the intermediate plate portion 116A opposite to the extended plate portion 115A toward the outer regulating claw 103 in the disk rotation direction. Flat extending parallel to -Shaped contact plate portion (contact portion) 117A and the end portion of the contact plate portion 117A opposite to the intermediate plate portion 116A from the end of the contact plate portion 117A toward the outer restricting claw 103 in the disk rotation direction. And a flat front end plate portion 118A extending obliquely so as to be positioned on the side.

  Such a shim plate 7A is engaged with the friction pad 6A as shown in FIG. At that time, one protrusion 100A of the back plate 78 is inserted between the board portion 114A and the extension plate portion 115A of one locking claw 102A and the contact plate portion 117A, and the other locking claw is inserted. The other protruding portion 100A of the back plate 78 is inserted between the substrate portion 114A and the extending plate portion 115A of 102A and the contact plate portion 117A. In this locked state, the shim plate 7A is such that the main plate portion 101 and the substrate portions 114A and 114A face the pressing force transmission surface 77 of the back plate 78 so as to cover the main plate portion 81 of the friction pad 6. The sheet material 80 affixed to the portion 101 contacts the pressing force transmission surface 77. Further, the extending plate portions 115A and 115A face the pressing force transmission surface 77 while being inclined so as to be separated from the pressing force transmission surface 77 in the disk axial direction toward the opposite side to the substrate portions 114A and 114A. Since the intermediate plate portions 116A and 116A exceed the outer edge surface portion 87 of the back plate 78, the contact plate portions 117A and 117A extend in parallel with the lining application surface 76 of the back plate 78, and the locking projection portions 100A and 100A. It will contact | abut to the lining sticking surface 76 of a surface by surface contact. In addition, the front end plate portions 118 </ b> A and 118 </ b> A extend obliquely in a direction away from the lining application surface 76.

  In the above-described locked state, a part of the extension plate portions 115A and 115A and the intermediate plate portions 116A and 116A on the extension plate portions 115A and 115A side swell in a direction away from the pressing force transmission surface 77 of the back plate 78. Thus, the bulging portions 130A and 130A that are bent are configured. These bulging portions 130A and 130A are formed on the base end side of the pair of locking claws 102A and 102A, and the contact plate portions 117A and 117A described above are formed on the distal end side of the pair of locking claws 102A and 102A. Is formed.

  According to the second embodiment described above, the shim plate 7A is in contact with the pressing force transmission surface 77 of the back plate 78 with the sheet material 80 affixed to the main plate portion 101, and the front end side of the locking claws 102A, 102A. The abutting plate portions 117A and 117A come into contact with the lining application surface 76 of the locking projections 100A and 100A of the back plate 78, and at that time, the transmission of the pressing force on the proximal end side of the locking claws 102A and 102A The bulging portions 130A and 130A that swell in the direction away from the surface 77 give an appropriate biasing force to the contact plate portions 117A and 117A. At this time, the contact plate portions 117A and 117A and the front end plate portions 118A and 118A of the locking claws 102A and 102A arranged on the lining application surface 76 side are located on the outer side in the disk radial direction with respect to the disk 2. Even if the lining 75 is worn, the locking claws 102A and 102A do not come into contact with the disk 2, and the lining 75 can be used up effectively.

  In the above description, the friction pad 6A on the claw portion 52 side and the shim plate 7A engaged with the friction pad 6A have been described as examples. However, the friction pad on the piston 46 side and the shim plate 7A engaged with the friction pad 6A are also described. It is the same.

  In the first and second embodiments described above, the motorcycle disc brake has been described as an example. However, if the shim plate is locked to the friction pad, a disc brake for a four-wheeled vehicle, etc. The present invention can be applied to various other disc brakes.

  The disc brake of this embodiment is engaged with the friction pad positioned between the friction pad and the pressing means, the pressing means provided on the caliper, the friction pad pressed against the disc by the pressing means, and the friction pad. In the disc brake having a shim plate, the friction pad includes a lining that contacts the disc, and a back plate that transmits the pressing force from the pressing means to the pressing force transmission surface by attaching the lining to the lining applying surface. A locking claw is formed at an end of the shim plate at a rotation direction end of the disk located on the outer side in the radial direction of the disk. A contact portion that extends along the lining application surface of the plate and contacts the lining application surface is formed, and a bulge that swells in a direction away from the pressing force transmission surface of the back plate on the base end side. Part is a configuration that is formed.

  With such a configuration, the abutment portion of the locking claw of the shim plate abuts the lining application surface with relatively high dimensional accuracy and fine surface roughness on the back plate, and the contact portion is projected by the bulging portion of the locking claw. When the contact portion is pressed against the lining application surface, the shim plate is locked by the lining application surface and the pressing force transmission surface. For this reason, it is easier to manage the tightening margin of the shim plate as compared with the case where the back plate is a sheared surface and is locked to the outer edge surface portion and the inner edge surface portion with relatively low dimensional accuracy and rough surface roughness. . In addition, since the bending dimension of the locking claw can be made longer, the spring constant becomes smaller, and the tightening allowance can be easily managed from this point. Accordingly, the productivity of the disc brake can be improved. Further, variation in assembling property can be suppressed.

  In the disc brake of this embodiment, the locking claw is formed to extend from the pressing force transmission surface to the lining application surface across the edge of the back plate in the disc radial direction.

DESCRIPTION OF SYMBOLS 1 Disc brake 2 Disc 4 Caliper 5,6 Friction pad 7 Shim plate 75 Lining 76 Lining sticking surface 77 Pressing force transmission surface 78 Back plate 102,102A Locking claw 117,117A Contact plate part (contact part)
130, 130A bulge

Claims (1)

Pressing means provided on the caliper;
A friction pad pressed against the disk by the pressing means;
In a disc brake having a shim plate positioned between the friction pad and the pressing means and locked to the friction pad,
The friction pad is composed of a lining that contacts the disk, and a back plate on which the lining is attached to the lining application surface and the pressing force from the pressing means is transmitted to the pressing force transmission surface,
Of the end portions of the shim plate, a locking claw is formed at the rotational end portion of the disc located on the outer side in the radial direction of the disc,
The locking claw is formed with a contact portion extending along the lining application surface of the back plate on the distal end side and contacting the lining application surface, and from the pressing force transmission surface of the back plate on the base end side. A disc brake having a bulging portion that swells in a separating direction.

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