WO2019003919A1

WO2019003919A1 - Disk brake

Info

Publication number: WO2019003919A1
Application number: PCT/JP2018/022578
Authority: WO
Inventors: 学聖張; 史朗長島
Original assignee: 日立オートモティブシステムズ株式会社
Priority date: 2017-06-27
Filing date: 2018-06-13
Publication date: 2019-01-03

Abstract

An attachment member (2) comprising cast metal, the attachment member (2) being attached across a disk to a non-rotating portion of a vehicle and having a pair of pin insertion parts (13) extending in a disk axial direction, comprises a surface part (61) that faces an outer side of an outer-side torque-receiving part (14) formed on both a disk turn-in side and a disk turn-out side so as to bear braking torque of an outer-side friction pad, a surface part (41) that faces an inner side of the outer-side torque-receiving part (14), a surface part (62) that faces an outer side of an inner-side torque-receiving part (12) formed on both the disk turn-in side and the disk turn-out side so as to bear braking torque of an inner-side friction pad, and a surface part (63) that faces an inner side of the inner-side torque-receiving part (12). Among these surface parts, one surface part (41) is cut-machined, and the remaining surface parts are left as casting surfaces.

Description

Disc brake

The present invention relates to a disc brake.
Priority is claimed on Japanese Patent Application No. 2017-125120, filed Jun. 27, 2017, the content of which is incorporated herein by reference.

With respect to the torque receiving portion of the caliper body, there is a disc brake in which the surface of the friction pad on which the back plate abuts at the time of braking is finished after casting and the surface not in contact with the back plate remains as cast surface ).

JP, 2009-222225, A

In the disc brake, reduction of processing cost is desired.

The present invention provides a disk brake that can reduce processing costs.

According to one aspect of the present invention, a surface portion of the outer torque receiving portion facing the outer side, a surface portion of the outer torque receiving portion facing the inner side, a surface portion of the inner torque receiving portion facing the outer side, and the inner Among the surface portions of the side torque receiving portion facing the inner side, one surface portion is cut and the remaining surface portions remain as cast surfaces.

According to one aspect of the present invention, processing costs can be reduced.

It is sectional drawing which shows the disk brake of 1st Embodiment. It is a top view which shows the disk brake of 1st Embodiment. It is a rear view which shows the disc brake of 1st Embodiment. It is a front view which shows the disk brake of 1st Embodiment. It is a rear view which shows the attachment member of the disc brake of 1st Embodiment, a friction pad, and a pad spring. It is a side view which shows the attachment member of the disc brake of 1st Embodiment, a back plate, and a pad spring. It is VII-VII sectional drawing of FIG. It is a VIII-VIII sectional view of FIG. FIG. 8 is a cross-sectional view taken along the line IX-IX in FIG. It is a perspective view which shows the pad spring of the disc brake of 1st Embodiment. It is a partial top view which shows the attachment member of the disc brake of 2nd Embodiment. It is a XII-XII sectional view of FIG. It is a sectional side view which shows the attachment member of the disc brake of 2nd Embodiment, a back plate, and a pad spring. It is a rear view which shows the back plate of the disk brake of 2nd Embodiment. It is a top view which shows the back plate of the disk brake of 2nd Embodiment.

First Embodiment
The first embodiment will be described below with reference to FIGS.

The disk brake 10 of the first embodiment shown in FIGS. 1 to 4 is for a vehicle such as a car and applies a braking force to the vehicle. Specifically, it is for front wheel braking of a four-wheeled vehicle.
The disk brake 10 brakes the vehicle by stopping the rotation of the disk-shaped disk 1 rotating with the wheels (not shown). In FIG. 2 to FIG. 4, the rotation direction of the disc 1 when the vehicle is traveling forward is indicated by the arrow R. Hereinafter, the direction of the central axis of the disk 1 will be referred to as the disk axial direction. The radial direction of the disk 1 is referred to as the disk radial direction. The circumferential direction of the disc 1, that is, the rotation direction is referred to as a disc circumferential direction. Further, in the disk brake 10, the inlet side in the rotational direction of the disk 1 when the vehicle travels forward is referred to as the disk rotation side, and the outlet side is referred to as the disk rotation side.

As shown in FIG. 1, the disc brake 10 includes an attachment member 2, a pair of

friction pads

3 and 4, and a caliper 5. Further, as shown in FIG. 2, the disc brake 10 is provided with a pair of boots 6. The disc brake 10 is provided with four pad springs 7 as shown in FIGS. 3 and 4.

The mounting member 2 includes the inner beam portion 11 and the pair of inner side torque receiving portions 12 shown in FIG. 3, the pair of pin insertion portions 13 shown in FIG. 2, the pair of outer side torque receiving portions 14 shown in FIG. And an outer beam portion 15. The mounting member 2 is a casting integrally formed by casting. The mounting member 2 has a mirror-symmetrical shape based on the center in the circumferential direction of the disk. The mounting member 2 is made of, for example, cast iron.

As shown in FIG. 1, the inner beam portion 11 is disposed on one side in the disc axial direction with respect to the disc 1 and attached to the non-rotational portion of the vehicle. Here, the non-rotational portion of the vehicle to which the mounting member 2 is attached is disposed on the inner side with respect to the disc 1 in the vehicle width direction of the vehicle, that is, on the inner side. The inner beam portion 11 attached to the non-rotational portion is also disposed on the inner side with respect to the disc 1. As shown in FIG. 3, the inner beam portion 11 is disposed to extend in the circumferential direction of the disc. The inner beam portion 11 is provided with a pair of mounting bosses 18 on both sides in the circumferential direction of the disk, that is, on the disk rotation side and the disk rotation side. Each of the pair of mounting bosses 18 has a mounting hole 17. The inner beam portion 11 is attached to the non-rotational portion of the vehicle at a pair of attachment bosses 18. At this time, the pair of mounting bosses 18 abut the non-rotational portion of the vehicle at the mounting surface 19 facing the inner side, whereby the positioning bosses 18 are positioned in the disk axial direction.

In the pair of inner side torque receiving portions 12, one inner side torque receiving portion 12 is from the end of the inner beam portion 11 at the disk rotation entry side to the outer side in the disc radial direction (opposite to the center of the disc 1) Extend out. Further, the other inner torque receiving portion 12 extends from the end of the inner beam portion 11 on the disc rotation side to the outer side in the disc radial direction (opposite to the center of the disc 1). The pair of inner side torque receiving portions 12 are disposed on the inner side with respect to the disc 1 as the inner beam portion 11 is. The pair of inner side torque receiving portions 12 are respectively formed on the disk rotation inlet side and the disk rotation outlet side in the mounting member 2. The inner beam portion 11 connects the pair of inner torque receiving portions 12 with each other on the inner side in the disk radial direction (the center side of the disk 1).

As shown in FIG. 5, in the pair of pin insertion portions 13, one of the pin insertion portions 13 is as shown in FIG. 2 from the end on the disk radial direction outer side of the inner torque receiving portion 12 on the disk rotation side. In the direction of the disk axis, it extends over the outer peripheral side of the disk 1. As shown in FIG. 2, the other pin insertion portion 13 extends from the outer end of the inner torque receiving portion 12 on the disc rotation side in the disc radial direction across the outer peripheral side of the disc 1 in the disc axial direction. Get out. The pair of pin insertion portions 13 are respectively formed on the disc rotating side and the disc rotating side in the mounting member 2. The pair of pin insertion portions 13 extend from the pair of inner side torque receiving portions 12 beyond the disc 1 to the outside in the vehicle width direction of the vehicle, that is, the outer side.

In the pair of outer side torque receivers 14, one outer disk side torque receiver 14 on the disk rotation side is opposite to the inner torque receiver 12 on the disk insertion side pin insertion portion 13, ie, on the outer side. From the end, as shown in FIG. 4, it extends inward in the disc radial direction. As shown in FIG. 4, the outer side torque receiving portion 14 on the other side of the disk rotation side extends inward in the disk radial direction from the outer end of the pin insertion portion 13 on the disk rotation side. The pair of outer torque receiving portions 14 is disposed on the outer side with respect to the disk 1. The pair of outer side torque receiving portions 14 are respectively formed on the disc rotation side and the disk rotation side in the mounting member 2.

The outer beam portion 15 extends in the circumferential direction of the disk and connects the inner sides of the pair of outer side torque receiving portions 14 in the disk radial direction. The outer beam portion 15 is disposed on the outer side with respect to the disk 1 in the same manner as the pair of outer side torque receiving portions 14.

As described above, the mounting member 2 is disposed straddling the outer peripheral side of the disc 1 and mounted to the non-rotational portion of the vehicle. The inner beam portion 11 and the pair of inner side torque receiving portions 12 are disposed on the inner side of the mounting member 2 which is the mounting side to the non-rotational portion of the vehicle. The pair of outer side torque receiving portions 14 and the outer beam portion 15 are disposed on the outer side of the mounting member 2 opposite to the inner side.

As shown in FIG. 4 and FIG. 5, similar concave-shaped pad guide portions 20 are respectively formed on the pair of outer side torque receiving portions 14 and the pair of inner side torque receiving portions 12.

As shown in FIG. 4, a pad guide portion 20 is formed on the outer side torque receiving portion 14 on one disc rotation entry side. The pad guide portion 20 is the center in the disc circumferential direction from the tip surface 21 inside the disc circumferential direction of the outer side torque receiving portion 14 (the center side in the disc circumferential direction of the mounting member 2) And the opposite side). A pad guide portion 20 is also formed on the other outer side torque receiving portion 14 on the disc rotation side. The pad guide portion formed in the outer side torque receiving portion 14 on the other side of the disk rotation side also has a shape in which the outer side torque receiving portion 14 is recessed toward the outer side in the disk circumferential direction from the tip surface 21 inside the disk circumferential direction. Have. Therefore, in the pair of outer side torque receiving portions 14, concave pad guide portions 20 which are recessed in the direction away from each other along the disc circumferential direction are formed on the opposite sides. The pad guide portion 20 of one outer side torque receiving portion 14 and the pad guide portion 20 of the other outer side torque receiving portion 14 have a mirror-symmetrical shape.

As shown in FIG. 5, a pad guide portion 20 is formed on one inner torque receiving portion 12. The pad guide portion 20 has a shape which is recessed from the tip surface 21 on the inner side in the disc circumferential direction of the inner torque receiving portion 12 toward the outer side in the disc circumferential direction. A pad guide portion 20 is also formed on the other inner torque receiving portion 12. The pad guide portion 20 formed in the other inner torque receiving portion 12 also has a shape that is recessed from the tip surface 21 on the inner side in the disk circumferential direction of the inner side torque receiving portion 12 toward the outer side in the disk circumferential direction.
Therefore, in the pair of inner side torque receiving portions 12, concave pad guide portions 20 which are recessed in the direction away from each other along the disc circumferential direction are formed on the opposite sides. The pad guide portion 20 of one inner torque receiving portion 12 and the pad guide portion 20 of the other inner torque receiving portion 12 have a mirror-symmetrical shape.

Each of the pad guides 20 has a pad support surface 22 on the outer side in the disk radial direction, a pad support surface 23 on the inner side in the disk radial direction, and a torque receiving surface 24 connecting these. Here, one pad guide portion 20 which is formed to be recessed from one end surface 21 will be described including the relationship with the end surface 21.

As shown in FIG. 4, in the pad guide portion 20, the pad support surface 22, the pad support surface 23, and the torque receiving surface 24 are all along the disk axial direction. The pad support surface 22 and the pad support surface 23 extend in the circumferential direction of the disk from the distal end surface 21 in parallel with each other. The torque receiving surface 24 is orthogonal to the

pad supporting surfaces

22 and 23 and connects opposite ends to the tip surface 21 and is along the disk radial direction. The pad support surface 22 and the pad support surface 23 are surfaces perpendicular to the torque receiving surface 24, and are disposed on the outer side and the inner side in the disc radial direction across the torque receiving surface 24. The torque receiving surface 24 is parallel to a line connecting the center of the disk 1 and the center of the mounting member 2 in the disk circumferential direction.

As shown in FIG. 6, the outer torque receiving portion 14 has a base portion 25 and a thick portion 26. The thick portion 26 is thicker than the base portion 25 and partially protrudes from the base portion 25 to the inner side. As shown in FIG. 7, the thick portion 26 is formed on the inner side in the disc circumferential direction and the outer side in the disc radial direction than the base portion 25. The thick-walled portion 26 has an outer portion in the disc radial direction connected to the pin insertion portion 13 on the near side. The pad guide portion 20 formed on the outer side torque receiving portion 14 is formed within the range of the thick portion 26.

An end surface 27 of the outer side torque receiving portion 14 facing outward in the disc radial direction is formed in the thick portion 26. The distal end surface 21 of the outer side torque receiving portion 14 is also formed in the thick portion 26. The thick portion 26 has a wall surface 28 facing outward in the disk circumferential direction at a boundary portion with the base portion 25, a wall surface 29 facing inward in the disk radial direction inside the disk radial direction, and a disk And a wall surface 30 facing radially inward.

As shown in FIG. 5, in the mounting member 2, pin insertion holes 36 are formed in each of the pair of pin insertion portions 13. Each of the pair of pin insertion holes 36 is formed from the end surface 35 on the inner side to a halfway position on the outer side along the disc axial direction. Of the pair of slide pins 37 of the caliper 5 shown in FIG. 2, one slide pin 37 is slidably fitted in one of the pin insertion holes 36 of the pair of pin insertion holes 36, and the other slide pin 37 slidably fit in the other pin insertion hole 36. Thus, the pair of pin insertion portions 13 of the mounting member 2 slidably support the caliper 5 in the disk axial direction.

The mounting member 2 is a casting. The mounting member 2 is formed by performing cutting on a predetermined portion after casting. The mounting member 2 is provided with the inner mounting surface 19 of each of the pair of mounting bosses 18 shown in FIG. 5, the pair of mounting holes 17, and the inner end surface 35 of each of the pair of pin insertion portions 13; A pair of pin insertion holes 36 are formed by cutting. Further, the mounting member 2 is provided with the pad support surfaces 22 and 23 and the torque receiving surface 24 of the pad guide portions 20 of the pair of outer side torque receiving portions 14 and the pair of inner side torque receiving portions 12 shown in FIGS. Is formed by cutting.

In the first embodiment, the surface portions 41 shown in FIGS. 6 to 9 facing the inner side of each of the pair of outer side torque receiving portions 14 are cut and processed. Here, with reference to FIGS. 6 to 9, the surface portion 41 of one outer side torque receiving portion 14 will be described including the relationship with the pad guide portion 20 formed on the one outer side torque receiving portion 14. Do. The surface portion 41 of the other outer side torque receiving portion 14 has the same structure, and has a mirror-symmetrical shape with respect to the surface portion 41 of one outer side torque receiving portion 14.

As shown in FIG. 7, the surface portion 41 has a cutting portion 42 formed by cutting in the peripheral region of the pad guide portion 20 including the pad support surfaces 22 and 23 and the torque receiving surface 24. The surface portion 41 is the casting surface 43 except for the cutting portion 42. The cutting portion 42 is formed within the range of the thick portion 26. As shown in FIG. 8, the cutting portion 42 is recessed from the end surface 44 on the inner side of the thick portion 26 of the casting surface 43 toward the outer side.

As shown in FIG. 7, the cutting portion 42 is formed in the peripheral region of the pad guide portion 20. The cutting portion 42 is formed to be continuous on the outer side in the disc radial direction of the pad guide portion 20, the outer side in the disc circumferential direction, and the inner side in the disc radial direction. The cutting portion 42 is connected to all of the pad support surfaces 22 and 23 and the torque receiving surface 24. The cutting portion 42 is formed in a concave shape from the middle position of the tip end face 21 in the disc radial direction to the outside in the disc circumferential direction. The cutting portion 42 is formed inside the disc circumferential direction.

The cutting portion 42 has a wall surface 51, a wall surface 52, a wall surface 53, a wall surface 54, a wall surface 55, and a flat engagement surface 56. The wall surface 51 is formed outside the pad support surface 22 in the disc radial direction in parallel with the pad support surface 22. The wall surface 52 is formed on the inner side in the disk radial direction than the pad support surface 23 in parallel with the pad support surface 23. The wall surface 53 is formed outside the torque receiving surface 24 in the disk circumferential direction in parallel with the torque receiving surface 24. The wall surface 54 connects the wall surface 51 and the wall surface 53. The wall surface 55 connects the wall surface 52 and the wall surface 53. The engagement surface 56 extends so as to connect the outer side edge portions of the wall surfaces 51 to 55.

The wall surface 51, the wall surface 54, the wall surface 53, the wall surface 55, and the wall surface 52 are connected in this order.
The wall surfaces 51 to 55 all extend from the end surface 44 toward the outer side along the disc axial direction. The engagement surface 56 extends perpendicularly to the disk axial direction. In other words, the wall surfaces 51 to 55 rise from the engagement surface 56 toward the inner side. The wall surfaces 51 to 55 and the engagement surface 56 are cut and finished surfaces.

The wall surface 51 is along the end surface 27 in the disc radial direction with respect to the end surface 27 of the thick portion 26. The wall surface 52 is along the wall surface 29 on the outer side in the disc radial direction than the wall surface 29 of the thick portion 26. The wall surface 53 is along the wall surface 28 inside the circumferential direction of the disk than the wall surface 28 of the thick portion 26. The wall surface 54 is inclined with respect to the wall surface 51 so as to be positioned inside in the disc radial direction toward the wall surface 53 side. The wall surface 55 is inclined with respect to the wall surface 52 so as to be positioned on the outer side in the disc radial direction toward the wall surface 53.

An end face 44 formed of a cast surface of the thick portion 26 continuously covers the cutting portion 42 at the outer side in the radial direction of the disc, the outer side in the circumferential direction of the disc, and the inner side in the radial direction of the disc. The end face 44 extends in the disk circumferential direction and the disk radial direction. As shown in FIG. 8, the end surface 44 is a flat surface that spreads in an inclined manner so as to be positioned closer to the outer side in the disc axial direction as it is located inward in the disc radial direction. The end face 44 and the material surface 44A indicated by a two-dot chain line in FIG. 8 before forming the cutting portion 42 by processing are before forming the cutting portion 42; The whole is one flat surface. The inclination of the end surface 44 and the material surface 44A is a draft for removing the outer torque receiving portion 14 from the mold when the mounting member 2 is cast.

As shown in FIG. 9, a surface portion 61 facing the outer side of the outer torque receiving portion 14, a surface portion 62 facing the outer side of the inner torque receiving portion 12, and a surface portion 63 facing the inner side of the inner torque receiving portion 12. In all cases, the casting surface is left as it is without cutting. In other words, the surface portions 61 to 63 are entirely formed by casting. Therefore, a surface 61 of the outer torque receiving portion 14 facing the outer side, a surface 41 of the outer torque receiving portion 14 facing the inner, a surface 62 of the inner torque receiving portion 12 facing the outer, and an inner torque Of the surface portions 63 of the receiving portion 12 facing the inner side, only one surface portion 41 is cut and the remaining surface portions 61 to 63 remain as cast surfaces. Among the

surface portions

41 and 61 to 63, the peripheral region of the torque receiving surface 24 and the

pad supporting surfaces

22 and 23 is cut on one surface portion 41 to be cut.

Pad springs 7 are individually attached to the pair of inner side torque receiving portions 12 and the pair of outer side torque receiving portions 14 at positions of the respective pad guide portions 20. That is, four pad springs 7 are attached to one attachment member 2. Here, the pad spring 7 disposed on the inner side disk rotation inlet side and the pad spring 7 disposed on the outer disk outer rotation side are common parts. The pad spring 7 disposed on the inner side disc rotating side and the pad spring 7 disposed on the outer side disc rotating side are common parts. The disc spring on the inner side and the pad spring 7 on the disc side on the outer side, and the pad spring 7 on the disc side of the inner and outer discs on the disc side have mirror symmetry. There is.

The pad spring 7 is formed by press forming from a single plate material. The pad spring 7 will be described with reference to FIG. 10 by taking one of the mirror-symmetrical shapes as an example. The pad spring 7 shown in FIG. 10 is disposed on the disc rotating side on the outer side.

The pad spring 7 has a concave guide portion 82. The guide portion 82 has a substrate portion 83, a plate portion 84 and a plate portion 85. The substrate portion 83 is rectangular. The plate portion 84 extends perpendicularly to the substrate portion 83 from one end edge of the substrate portion 83. The plate portion 85 extends from the other end edge parallel to the one end edge portion of the substrate portion 83 in parallel with the plate portion 84 to the same side as the plate portion 84.

The pad spring 7 includes an extending portion 91, an engagement plate portion 92, a protruding plate portion 93, a protruding plate portion 94, a spring plate portion 95, and a spring plate portion 96. The extension portion 91 has an S shape, and from the position near the plate portion 85 of one end edge portion of the edge portions of the substrate portion 83 where the

plate portions

84 and 85 are not provided, the substrate In the thickness direction of the portion 83, the

plate portions

84 and 85 extend in the opposite direction. The engagement plate portion 92 is a plate in the thickness direction of the substrate portion 83 from a position near the plate portion 85 of the other edge portion of the edge portions where the

plate portions

84 and 85 of the substrate portion 83 are not provided. It protrudes in the opposite direction to the

portions

84 and 85. The protrusion plate portion 93 projects in the same plane as the plate portion 84 from the end edge portion of the plate portion 84 continued to the end edge portion provided with the extension portion 91 of the substrate portion 83, and then opposite to the plate portion 85 Protruding in the direction.

The protruding plate portion 94 protrudes in the opposite direction to the plate portion 85 in parallel to the substrate portion 83 from the edge portion of the plate portion 84 on the opposite side to the substrate portion 83. The spring plate portion 95 is folded back from the end edge portion of the projecting plate portion 94 continuing to the end edge portion of the plate portion 84 provided with the projecting plate portion 93 to the opposite side to the plate portion 84. The spring plate portion 96 extends in the same plane as the plate portion 85 from the end edge portion of the plate portion 85 which is continuous with the end edge portion provided with the extension portion 91 of the substrate portion 83, and then to the plate portion 84 side. It has been folded back. The spring plate portion 96, together with the substrate portion 83, the plate portion 84 and the plate portion 85, constitutes a concave guide portion 82.

The respective guide portions 82 of the pad spring 7 are fitted into the concave pad guide portions 20 of the pair of inner side torque receiving portions 12 and the pair of outer side torque receiving portions 14 respectively. By fitting the pad guide portion 20 in this manner, the plate portion 84 abuts on the pad support surface 22 of the pad guide portion 20 as shown in FIG. The substrate portion 83 abuts on the pad support surface 23 of the portion 20, and the substrate portion 83 abuts on the torque receiving surface 24 of the pad guide portion 20.

As shown in FIG. 9, the pad spring 7 attached to the outer torque receiving portion 14 clamps the outer torque receiving portion 14 between the extension portion 91 and the engagement plate portion 92. At that time, the extension portion 91 abuts on the surface portion 61 in the cast-skin state on the outer side, and the engagement plate portion 92 abuts on the cut engaging surface 56 of the surface portion 41 on the inner side. The engagement plate 92 does not contact the casting surface 43 of the surface 41. Here, the engagement plate portion 92 in a state of being in contact with the engagement surface 56 protrudes to the inner side more than the end surface 44 in the disc axial direction. Therefore, when the disc 1 and the outer side torque receiving portion 14 approach each other in the disc axial direction due to any deformation, the engagement plate portion 92 in a state in which the engagement surface 56 abuts contacts the disc 1 first. There is a high possibility of doing.

The pad spring 7 attached to the inner torque receiving portion 12 sandwiches the inner torque receiving portion 12 between the extension portion 91 and the engagement plate portion 92. At that time, the extension portion 91 abuts on the surface portion 63 of the cast surface in the inner side, and the engagement plate portion 92 abuts on the surface portion 62 of the cast surface on the outer side.

The pair of

friction pads

3 and 4 shown in FIG. 1 are common parts. Each of the pair of

friction pads

3 and 4 has a metal back plate 101 and a lining 102 which is a friction material attached to the back plate 101. The friction pad 4 is supported by the mounting member 2 at the back plate 101 via the pad spring 7 and contacts the disc 1 at the lining 102.

The back plate 101 has a main plate portion 105, a convex portion 106, and a projecting portion 107. A lining 102 is attached to the main plate portion 105. The convex portion 106 protrudes from the outer end of the main plate portion 105 in the disc circumferential direction to the outer side in the disc circumferential direction as shown in FIG. The projecting portion 107 projects from the end edge of the convex portion 106 on the opposite side to the main plate portion 105 along the disc axial direction as shown in FIG. The projecting portion 107 projects from the convex portion 106 to the opposite side to the lining 102 shown in FIG. 1, that is, to the opposite side to the disc 1. The back plate 101 has a mirror-symmetrical shape. Accordingly, the convex portions 106 project in opposite directions from both end portions of the main plate portion 105 in the disc circumferential direction, and the projecting portions 107 are edge edges of the pair of convex portions 106 on the opposite side to the respective main plate portions 105. It projects from the part in the opposite direction to the lining 102.

Of the pair of

friction pads

3 and 4, the friction pad 3 on the inner side, which is the attachment side to the non-rotational part of the vehicle, has the pair of convex portions 106 on the same inner side with respect to the disc 1 as shown in FIG. It inserts in the guide part 82 of a pair of pad spring 7 attached to a pair of inner side torque receiving part 12 in a. At this time, the pair of convex portions 106 are respectively sandwiched between the plate portion 84 and the spring plate portion 96 in a state where the spring plate portion 96 is elastically deformed. At the same time, in the friction pad 3, the main plate portion 105 elastically deforms the spring plate portion 95 in the circumferential direction of the disk. Thus, the friction pad 3 on the inner side attached to the attachment member 2 via the pair of pad springs 7 is positioned on one side of the disc 1 and can be moved in the disc axial direction with respect to the attachment member 2 .

Of the pair of

friction pads

3 and 4, the friction pad 4 on the outer side, which is the opposite side to the inner side, has a pair of convex portions 106 on the same outer side with respect to the disc 1 as shown in FIG. Is inserted into the guide portions 82 of the pair of pad springs 7 attached to the outer side torque receiving portion 14 of FIG. At this time, the pair of convex portions 106 are held between the plate portion 84 and the spring plate portion 96 in a state where the spring plate portion 96 is elastically deformed. At the same time, in the friction pad 4, the main plate portion 105 elastically deforms the spring plate portion 95 in the circumferential direction of the disk. Thus, the friction pad 4 on the outer side attached to the attachment member 2 via the pair of pad springs 7 is located on the other surface side of the disc 1 and is movable in the disc axial direction with respect to the attachment member 2 Become. Therefore, the pair of

friction pads

3 and 4 are positioned on both sides of the disk 1 and attached to the mounting member 2 so as to be movable in the disk axial direction.

Each pad spring 7 is attached to the mounting member 2 to resiliently support the corresponding one of the

friction pads

3, 4. The convex portion 106 is guided by the plate portion 84 of the guide portion 82 of the pad spring 7, the base portion 83, and the spring plate portion 96 to move in the disk axial direction. In other words, the guide portion 82 of the pad spring 7 guides the corresponding one of the

friction pads

3 and 4 in the disc axial direction. The convex portion 106 is pressed outward in the disc radial direction by the biasing force of the spring plate portion 96 and abuts on the plate portion 84. The convex portion 106 slightly moves inward in the disc radial direction while elastically deforming the spring plate portion 96 when a corresponding one of the

friction pads

3 and 4 receives a force inward in the disc radial direction. The

friction pads

3 and 4 are pressed in the direction in which the convex portion 106 is separated from the substrate portion 83 by the biasing force of the spring plate portion 95. When a force in the circumferential direction of the disk is received in the opposite direction, the

friction pads

3 and 4 move in the circumferential direction of the disk while elastically deforming the spring plate portion 95, and the convex portion 106 abuts on the substrate portion 83. Let

As shown in FIG. 5, in the concave pad guide portion 20 of the inner torque receiving portion 12, the convex portion 106 of the friction pad 3 on the inner side is disposed in a nested manner via the guide portion 82 of the pad spring 7. Be done. Therefore, in the pad guide portion 20 of the inner torque receiving portion 12, the pad support surface 22 on the outer side in the disk radial direction and the pad support surface 23 on the inner side in the disk radial direction are the disk diameters of the convex portion 106 of the friction pad 3 on the inner side. The movement of the direction is restricted via the plate portion 84 and the plate portion 85 and the spring plate portion 96. Further, in the pad guide portion 20 of the inner side torque receiving portion 12, the torque receiving surface 24 receives braking torque in the circumferential direction of the disc from the convex portion 106 of the friction pad 3 on the inner side via the substrate portion 83.

As shown in FIG. 4, in the concave pad guide portion 20 of the outer side torque receiving portion 14, the convex portion 106 of the friction pad 4 on the outer side is disposed in a nested manner via the guide portion 82 of the pad spring 7. Be done. Therefore, in the pad guide portion 20 of the outer side torque receiving portion 14, the pad support surface 22 on the outer side in the disk radial direction and the pad support surface 23 on the inner side in the disk radial direction are disk diameters of the convex portion 106 of the friction pad 4 on the outer side. The movement of the direction is restricted via the plate portion 84 and the plate portion 85 and the spring plate portion 96. Further, in the pad guide portion 20 of the outer side torque receiving portion 14, the torque receiving surface 24 receives braking torque in the disk circumferential direction from the convex portion 106 of the friction pad 4 on the outer side via the substrate portion 83.

As described above, in the mounting member 2, the inner torque receiving portion 12 receives the braking torque of the friction pad 3 on the inner side, which is the mounting side of the pair of

friction pads

3 and 4 to the non-rotational portion of the vehicle. As such, they are formed on the disc rotation side and the disc rotation side, respectively. In addition, the disk rotation side and the disk rotation are performed so that the outer torque receiving portion 14 receives the braking torque of the friction pad 4 on the outer side, which is the opposite side to the inner side, of the pair of

friction pads

3 and 4. Each side is formed.

In the caliper 5, as shown in FIG. 2, a pair of slide pins 37 provided on both sides in the circumferential direction of the disc respectively correspond to the corresponding pin insertion holes 36 of the pair of pin insertion portions 13 of the mounting member 2 shown in FIG. It is slidably fitted. Thus, the caliper 5 is slidably supported by the mounting member 2 in the disc axial direction.

As shown in FIG. 1, the caliper 5 includes a caliper body 120, a piston 121, a piston seal 122, and a piston boot 123.

The caliper body 120 is integrally formed by casting. The caliper body 120 includes a cylinder portion 126, a bridge portion 127, a claw portion 128, and a pair of pin attachment portions 131. The cylinder portion 126 is disposed on the inner side with respect to the disk 1 in the disk axial direction. The bridge portion 127 extends along the disc axial direction so as to straddle the outer periphery of the disc 1 from the outer side of the cylinder portion 126 in the disc radial direction. The claw portion 128 extends inward in the disc radial direction from the side opposite to the cylinder portion 126 of the bridge portion 127 and is positioned on the other side of the disc 1 in the disc axial direction. As shown in FIG. 2, the pair of pin attachment portions 131 extend from the cylinder portion 126 to both sides in the disk circumferential direction.

In the caliper body 120, the slide pin 37 is attached to the pin attachment portion 131 on the disc rotation side, and the slide pin 37 is attached to the pin attachment portion 131 on the disc rotation side. One end of the pair of boots 6 is in contact with the end face 35 of the pin insertion portion 13, and the other end is in contact with the slide pin 37.

As shown in FIG. 1, a cylinder bore 135 is formed in the cylinder portion 126. One end of the cylinder bore 135 opens toward the claw portion 128, and the cylinder bore 135 is recessed toward the opposite side to the disc 1 in the disc axial direction. Although not shown, the cylinder portion 126 is provided with a plurality of cylinder bores 135, specifically, two places. The cylinder bores 135 have the same shape, are aligned in the disk circumferential direction with the positions in the disk axial direction and the disk radial direction aligned, and the positions in the disk circumferential direction shifted.

By forming the plurality of cylinder bores 135, the cylinder portion 126 has the cylinder bottom 136 including the inner bottom surfaces 138 of the plurality of cylinder bores 135 on the side opposite to the claw 128, and from the cylinder bottom 136 to the claw The cylinder body 137 extends to the 128 side and includes wall surfaces 139 of a plurality of cylinder bores 135.

The pistons 121 are arranged in the cylinder bores 135 so as to be movable in the disc axial direction. The wall surface 139 of the cylinder bore 135 has a guide inner circumferential surface 141 which is a cylindrical surface for guiding the movement of the piston 121. The wall surface 139 of the cylinder bore 135 has an annular large diameter groove 142 recessed radially outward of the guide inner circumferential surface 141 on the cylinder bottom 136 side of the guide inner circumferential surface 141. The wall surface 139 of the cylinder bore 135 has an annular piston seal groove 145 recessed radially outward from the guide inner circumferential surface 141 at an intermediate position opposite to the cylinder bottom 136 of the guide inner circumferential surface 141. .

A boot fitting hole 148 is formed in the cylinder portion 126 closer to the claw portion 128 than the cylinder bore 135. The boot fitting hole 148 has an annular shape which is recessed radially outward of the guide inner circumferential surface 141 of the cylinder bore 135. An opening 151 of the cylinder bore 135 opens at the bottom of the boot fitting hole 148. A piping hole 155 is formed in the cylinder bottom portion 136 of the cylinder portion 126, as shown in FIG. The piping hole 155 is provided at the center position of the caliper body 120 in the disc circumferential direction. The piping holes 155 branch in the cylinder portion 126 and communicate with the respective cylinder bores 135.

As shown in FIG. 1, the piston 121 includes a disc-like piston bottom 171 and a cylindrical piston body 172. The piston 121 is formed in a bottomed cylindrical shape in which an end opposite to the piston bottom 171 of the piston body 172 is opened. An annular locking groove 175 recessed inward in the radial direction from an outer diameter surface 174 formed of a cylindrical surface is formed on the piston body 172 opposite to the piston bottom 171 in the axial direction. The piston 121 is accommodated in the cylinder bore 135 such that the piston bottom 171 is positioned on the cylinder bottom 136 in the cylinder bore 135. In this state, the open end of the piston 121 on the side of the claw portion 128 protrudes to the side of the claw portion 128 relative to the cylinder bore 135. The locking groove 175 is formed on the end of the piston 121 which protrudes beyond the cylinder bore 135 as described above.

The piston seal 122 is fitted in the piston seal groove 145 of the cylinder bore 135. A piston 121 is fitted on the inner peripheral side of the piston seal 122. The piston seal 122 seals the gap between the cylinder portion 126 and the piston 121, and supports the piston 121 movably in the disc axial direction with the guide inner circumferential surface 141 of the cylinder bore 135.

The piston boot 123 has an annular large diameter fitting portion 176 fitted in the boot fitting hole 148 of the cylinder portion 126, an annular small diameter fitting portion 177 fitted in the locking groove 175 of the piston 121, and the like. And an expandable and contractible bellows 178. The piston boot 123 covers an outer peripheral portion exposed from the cylinder portion 126 of a portion closer to the cylinder bore 135 than the locking groove 175 of the piston 121. In the piston boot 123, along with the movement of the piston 121 with respect to the cylinder portion 126, the middle bellows portion 178 which is not fixed to the cylinder portion 126 and the piston 121 expands and contracts.

Here, the hydraulic fluid is supplied / discharged through the piping hole 155 between the cylinder bottom portion 136 of the cylinder portion 126 and the portion on the cylinder bottom portion 136 side of the cylinder body portion 137 and the piston 121 fitted in the cylinder bore 135. Constitute a fluid pressure chamber 180. As a result of the cylinder bores 135 being arranged side by side in the circumferential direction of the disc, a plurality of, specifically two, hydraulic pressure chambers 180 are also arranged side by side, in the circumferential direction of the disc.

The hydraulic fluid is introduced into the piping hole 155 of the caliper 5 to the disc brake 10 via a brake piping (not shown). Then, the hydraulic fluid is introduced into the two hydraulic pressure chambers 180. Then, the brake fluid pressure acts on the piston 121 of the caliper 5 in each of the two fluid pressure chambers 180. As a result, both pistons 121 advance to the disc 1 side, and press the inner friction pad 3 disposed between the pistons 121 and the disc 1 toward the disc 1. As a result, the friction pad 3 moves and contacts the disc 1. Further, the caliper body 120 slides the slide pin 37 with respect to the mounting member 2 by the reaction force of this pressing to move in the disc axial direction, and the claw portion 128 is disposed between the claw portion 128 and the disc 1 The friction pad 4 on the outer side is pressed against the disc 1. As a result, the friction pad 4 contacts the disc 1. In this manner, the caliper 5 holds the pair of

friction pads

3 and 4 from both sides by the pistons 121 and the claws 128 by the operation of the plurality of pistons 121 and presses the both sides of the disc 1. As a result, the caliper 5 applies frictional resistance to the disc 1 to generate a braking force. The caliper 5 is a fist-type caliper.

In the disk brake described in Patent Document 1, the surface of the caliper body to be in contact with the back plate of the friction pad at the time of braking is finished after casting, and the surface not in contact with the back plate is left cast. By the way, reduction of processing cost is desired in a disk brake.

In the disk brake 10 of the first embodiment, the surface 61 facing the outer side of the outer torque receiving portion 14, the surface 41 facing the inner side of the outer torque receiving portion 14, and the outer side of the inner torque receiving portion 12. Of the facing surface portion 62 and the surface portion 63 facing the inner side of the inner torque receiving portion 12, one surface portion 41 is cut and the remaining surface portions 61 to 63 remain as cast surfaces. For this reason, processing cost can be reduced. For example, a dedicated processing machine or the like for simultaneous double-sided processing, which was necessary when processing the surface portion 41 facing the inner side of the outer torque receiving portion 14 and the surface portion 62 facing the outer side of the inner torque receiving portion 12, is unnecessary. And can be processed by a general-purpose NC processing machine.

The surface portion 41 facing the inner side of the outer side torque receiving portion 14 is a surface perpendicular to the torque receiving surface 24 and the torque receiving surface 24 receiving the braking torque in the disk circumferential direction, and the disk receiving surface 24 is interposed therebetween. The peripheral regions of the pad support surfaces 22 and 23 which are disposed on the outer side and the inner side of the disc and which restrict the movement of the friction pad 4 in the disc radial direction are cut. For this reason, the movement limit of the friction pad 4 in the outer side torque receiving portion 14 to the inner side can be accurately defined.

Only the surface 41 facing the inner side of the outer torque receiving portion 14 is cut, and the remaining surface 61 facing the outer side of the outer torque receiving portion 14 and the surface 62 facing the outer side of the inner torque receiving portion 12 and the other The surface portion 63 of the inner torque receiving portion 12 facing the inner side remains as a cast surface. Therefore, by receiving the braking torque, the accuracy on the inner side of the outer torque receiving portion 14 which is easily displaced with respect to the disk 1 can be improved, and the accuracy can be effectively improved.

The engagement plate portion 92 of the pad spring 7 attached to the outer side torque receiving portion 14 is closer to the disc 1 than the end surface 44 on the inner side of the outer side torque receiving portion 14, so contact with the disc 1 needs to be avoided. is there. On the other hand, by bringing the engagement plate portion 92 into contact in the outer side torque receiving portion 14, the engagement surface 56 for positioning in the disc axial direction can be formed with high precision by cutting. Thereby, the clearance between the outer side torque receiving portion 14 and the disc 1 set so as to avoid contact between the engagement plate portion 92 and the disc 1 can be narrowed.

Thus, the outer torque receiving portion 14 can be brought closer to the disk 1, so the pin insertion portion 13 can be shortened, and the outer torque receiving portion receives the braking torque from the friction pad 4 at the outer torque receiving portion 14. The displacement of the part 14 can be suppressed.

Second Embodiment
Next, a second embodiment will be described mainly based on FIGS. 11 to 15, focusing on differences from the first embodiment. The parts common to the first embodiment are denoted by the same reference numerals and the same symbols.

In the second embodiment, as shown in FIGS. 11 to 13, the shapes of the cutting portion 42 of the outer torque receiving portion 14 of the mounting member 2 are different. As shown in FIG. 12, the cutting portion 42 of the second embodiment is also formed in the peripheral region of the concave pad guide portion 20 as in the first embodiment. The cutting portion 42 is formed continuously with the outer side in the disc radial direction, the outer side in the circumferential direction of the disc, and the inner side in the radial direction of the disc of the pad guide portion 20. It is connected to all.

The cutting portion 42 has a wall surface 201 disposed between the pad guide portion 20 and the pin insertion portion 13 closer to the pad guide portion 20, and a flat engagement surface 56 extending from the outer edge of the wall surface 201. And. The wall surface 201 extends from the end surface 44 which is a casting surface to the outer side along the disc axial direction. The engagement surface 56 extends perpendicularly to the disk axial direction. The wall surface 201 and the engagement surface 56 are cut and finished surfaces. The engagement plate portion 92 of the pad spring 7 abuts on the engagement surface 56 as in the first embodiment.

The wall surface 201 is inclined so that the wall surface 201 is positioned inward in the circumferential direction of the disk toward the outer side in the disk radial direction. The wall surface 201 has an arc shape having a center on the inner side in the radial direction of the disk and the inner side in the circumferential direction of the disk.

The engagement surface 56 extends to the end surface 27 of the thick portion 26 and is connected to the end surface 27. Further, the engagement surface 56 extends to the end surface 21 and is connected to the end surface 21. In addition, the engagement surface 56 extends to the wall surface 29 of the thick portion 26 and is connected to the wall surface 29. Further, the engagement surface 56 extends to the wall surface 28 of the thick portion 26 and is connected to the wall surface 28. As a result, in the second embodiment, as shown in FIG. 13, the cutting portion 42 is formed by cutting the material surface 44A before forming the cutting portion 42 in the disk radial direction.

In the second embodiment, the cutting portion 42 is continuously formed on the outer side in the radial direction of the disc, the inner side in the circumferential direction of the disc, the inner side in the radial direction of the disc, and the outer side in the circumferential direction of the disc. In other words, the cutting portion 42 is formed so as to cross the peripheral region of the pad guide portion 20 of the thick portion 26 in the disk radial direction and also in the disk circumferential direction. Furthermore, in other words, the cutting portion 42 has no wall surface rising from the engagement surface 56 other than the wall surface 201. In the cutting portion 42, the engagement surface 56 overlaps with the disc 1 in the disc radial direction. More specifically, the engagement position of the engagement plate portion 92 of the pad spring 7 at the engagement surface 56 overlaps the disc 1 in the disc radial direction.

The cutting portion 42 of the second embodiment having the above shape is continuously formed on the outer side in the disc radial direction, the inner side in the disc circumferential direction, the inner side in the disc radial direction, and the outer side in the disc circumferential direction. It can be easily formed by milling with a rotating tool T of the shape of a circle. Therefore, the manufacturing cost can be reduced. In this case, even when the machining tolerance is maximum, machining is performed so as to secure a gap of 1 mm or more between the wall surface 201 of the cutting portion 42 and the pin insertion portion 13 on the side closer thereto.

In addition, since the engagement surface 56 formed with high accuracy by cutting overlaps with the disc 1, even if the engagement surface 56 approaches the disc 1 in the disc axial direction, the pad spring is engaged with the engagement surface 56 The contact between the engagement plate portion 92 and the disc 1 can be avoided.

As described above, since the engagement surface 56 can be brought close to the disk 1 in the disk axial direction, the pad guide portion 20 at which the position of the engagement surface 56 becomes the end on the disk 1 side is brought close to the disk 1 in the disk axial direction. be able to. Therefore, even if the thickness in the disc axial direction of the back plate 101 of the friction pad 4 supported by the pad guide portion 20 is reduced, the back plate 101 can be prevented from dropping off from the pad guide portion 20 when the lining 102 is worn. . Therefore, in the second embodiment, as shown in FIG. 14 and FIG. 15, the back plate 101 of the friction pad 4 can be a back plate 101 having no protrusion 107 of the first embodiment in the convex portion 106. . Therefore, the shape of the back plate 101 is simplified and the manufacture is facilitated. Also in this respect, the manufacturing cost can be reduced. Also in the first embodiment, the back plate 101 without the projecting portion 107 can be adopted for the same reason.

Further, since the outer side torque receiving portion 14 can be brought closer to the disk 1, the pin insertion portion 13 can be shortened, and the outer side torque receiving portion when receiving the braking torque from the friction pad 4 in the outer side torque receiving portion 14 The displacement of 14 can be suppressed.

In the first and second embodiments described above, the surface 61 facing the outer side of the outer torque receiving portion 14, the surface 41 facing the inner side of the outer torque receiving portion 14, and the inner torque receiving portion 12. Of the surface portion 62 facing the outer side of the inner surface and the surface portion 63 facing the inner side of the inner torque receiving portion 12, only one surface portion 41 is cut and the remaining surface portions 61 to 63 remain as cast surfaces. The explanation was made with the case of However, the present invention is not limited to this, and if only one of the

surface portions

41 and 61 to 63 is cut and the remaining surface remains cast, the processing cost can be reduced. Can.

According to the first aspect of the embodiment described above, the disc brake is attached to the non-rotational portion of the vehicle across the disc, and is a mounting member made of casting having a pair of pin insertion portions extending in the disc axial direction. And a pair of friction pads positioned on both sides of the disc and movably mounted in the disc axial direction with respect to the mounting member. The mounting member is provided on each of the disk rotation side and the disk rotation side so as to receive the braking torque of the friction pad on the inner side, which is the mounting side to the non-rotational portion of the vehicle among the pair of friction pads. Receives the braking torque of the formed inner side torque receiving portion, the inner beam portion connecting the inner side torque receiving portions, and the friction pad on the outer side opposite to the inner side with respect to the disc An outer-side torque receiving portion formed on each of the disk rotation inlet side and the disk rotation-out side, and an outer beam portion connecting the outer torque receiving portions. A surface portion of the outer torque receiving portion facing the outer side, a surface portion of the outer torque receiving portion facing the inner side, a surface portion of the inner torque receiving portion facing the outer side, and the inner torque receiving portion Of the surface portions facing the inner side, one surface portion is cut and the remaining surface portions remain as cast surfaces. This makes it possible to reduce the processing cost.

In the second aspect, in the first aspect, the outer torque receiving portion and the inner torque receiving portion are formed by a torque receiving surface that receives a braking torque in the disk circumferential direction and a surface perpendicular to the torque receiving surface. A pad supporting surface disposed on the outer side and the inner side in the disc radial direction sandwiching the torque receiving surface to restrict movement of the friction pad in the disc radial direction; The present invention is characterized in that the torque receiving surface and the peripheral region of the pad supporting surface are machined.

In the third aspect, in the first or second aspect, a surface portion of the outer torque receiving portion facing the outer side, a surface portion of the outer torque receiving portion facing the inner side, the inner torque receiving portion The surface of the outer torque receiving portion facing the inner side is cut out of the surface facing the outer side of the portion and the surface facing the inner side of the inner torque receiving portion, and the remaining surface is cast It is characterized by being as it is.

According to the above-described disk brake, it is possible to reduce the processing cost.

DESCRIPTION OF SYMBOLS 1 disc 2 mounting

member

3, 4 friction pad 10 disc brake 11 inner beam portion 12 inner side torque receiving portion 13 pin insertion portion 14 outer side torque receiving portion 15

outer beam portion

22, 23 pad support surface 24 torque receiving surface 41 surface portion Surface part facing the inner side of the outer side torque receiving part)
61 Surface (surface facing the outer side of the outer torque receiving part)
62 Surface (surface facing the outer side of the inner torque receiving portion)
63 Face (face facing inner side of inner torque receiving part)

Claims

A mounting member made of castings mounted on a non-rotating portion of a vehicle straddling a disk and having a pair of pin insertion portions extending in the disk axial direction;
A pair of friction pads located on both sides of the disc and movably attached to the mounting member in the disc axial direction;
Equipped with
The mounting member is
The inner side formed on the disc rotation side and the disc rotation side so as to receive the braking torque of the friction pad on the inner side, which is the attachment side to the non-rotational part of the vehicle among the pair of friction pads A torque receiver,
An inner beam portion connecting the inner torque receiving portions;
An outer torque receiving portion formed on each of the disk rotation side and the disk rotation side so as to receive the braking torque of the friction pad on the outer side opposite to the inner side with respect to the disk;
And an outer beam portion connecting the outer torque receiving portions.
A surface portion of the outer torque receiving portion facing the outer side, a surface portion of the outer torque receiving portion facing the inner side, a surface portion of the inner torque receiving portion facing the outer side, and the inner torque receiving portion A disc brake in which one of the surface portions facing the inner side is cut and the remaining surface remains cast.
The outer torque receiving portion and the inner torque receiving portion
A torque receiving surface that receives braking torque in the disk circumferential direction,
A pad supporting surface which is a surface perpendicular to the torque receiving surface and which is disposed on the outer and inner sides in the disk radial direction across the torque receiving surface and which restricts the movement of the friction pad in the disk radial direction;
The disk brake according to claim 1, wherein in the one surface portion to be cut, a peripheral region of the torque receiving surface and the pad support surface is cut.
A surface portion of the outer torque receiving portion facing the outer side, a surface portion of the outer torque receiving portion facing the inner side, a surface portion of the inner torque receiving portion facing the outer side, and the inner torque receiving portion The disk brake according to claim 1 or 2, wherein among the surface portions facing the inner side, the surface portion facing the inner side of the outer side torque receiving portion is cut, and the remaining surface portions remain cast.