JP2011106589A - Disk brake device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To sufficiently secure durability in a curved portion of an elastic part, and to improve yield of rolled steel plate material, in a pad support of a disk brake device. <P>SOLUTION: The pad support 70 is made from the rolled steel plate material, and includes a guide part 72a, an elastic part 72b, and a press part 72c. The guide part 72a houses a projection part 61a of a back plate 61 movable in a rotor axis direction. The elastic member 72b includes: a flat face portion 72b1 formed at the end of a rotor diameter inner side portion 72a1 of the guide part 72a; and the curved portion 72b2, which is extended therefrom in a rotor circumferential direction, and of which the tip side is folded back. The press part 72c is formed at the tip of the curved portion 72b2, and is overlapped with a rotor diameter outer side of the rotor diameter inner side portion 72a1 by the folding back of the curved portion 72b2, so as to urge the projection part 61a toward the outside of the rotor diameter. A folding line of the folding back of the curved portion 72b of the elastic part 72b is orthogonal to a rolling direction of the rolled steel plate. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a disc brake device employed in a vehicle, and more particularly to a disc brake device including a pad support for stably holding a brake pad.

  As one of the disk brake devices, a disk rotor that can rotate integrally with a wheel, a support body that is assembled to a vehicle body, and a disk rotor that is disposed so as to be able to sandwich the disk rotor in a rotor axial direction with respect to the support body The brake pad includes a pair of brake pads that are movably assembled, and a pushing member that can push the back plate of each brake pad toward the disk rotor, and the brake pads are assembled to the support body. There is a disc brake device including a pad support that is interposed between a rotor circumferential end of the back plate and the support body and supports the brake pads movably in the rotor axial direction. It is described in.

JP 11-325133 A

  In the disc brake device described in Patent Document 1 described above, the pad support (described as a pad clip in Patent Document 1) is made of sheet metal and is formed at the rotor circumferential end of the back plate. A U-shaped guide portion that accommodates the projected portion so as to be movable in the rotor axial direction, and a planar portion formed on the end portion side of the guide portion that is farther from the disk rotor than the inner side of the rotor diameter. An elastic portion having a curved portion formed by extending in the rotor axial direction from the flat portion and being folded back at the tip end side, and the curved portion formed continuously from the tip of the curved portion in the elastic portion is folded back. By being formed in such a manner, it is overlapped on the rotor diameter outer side of the rotor diameter inner side portion of the guide portion, and the convex portion of the back plate is biased toward the rotor diameter outer side. It has a pressing portion.

  In the disc brake device described in Patent Literature 1 described above, when the pad support is manufactured from a rolled steel plate, it is formed by bending the elastic part (extending in the rotor axial direction and folding the tip side). It is desirable to set the fold line when the curved portion is folded back so as to be orthogonal to the rolling direction of the rolled steel sheet in order to ensure the durability at the portion).

  However, in the pad support described in Patent Document 1 described above, when the fold line when the curved portion is folded and formed is set to be orthogonal to the rolling direction of the rolled steel plate, the rolled steel plate In the shape of punching out (deployed shape), the portion that becomes the rotor diameter inner side portion of the guide portion, the portion that becomes the flat portion of the elastic portion, the portion that becomes the curved portion of the elastic portion, and the pressing portion A site | part becomes linear along the rolling direction of a rolled steel plate, and there exists a possibility that the yield of a rolled steel plate material may worsen.

  The present invention has been made to solve the above-described problems, and in the pad support of the disc brake device, the durability at the curved portion of the elastic portion can be sufficiently and sufficiently secured, and the yield of the material can be improved. In the above-described disc brake device, the pad support is formed by being punched from a rolled steel plate into a predetermined shape and then bent, and is formed on a rotor circumferential end of the back plate. A U-shaped guide portion that accommodates the portion movably in the axial direction of the rotor, and a flat portion formed on the end portion of the guide portion on the inner side of the rotor diameter that is far from the disk rotor. An elastic portion having a curved portion formed by extending in the circumferential direction of the rotor and being folded back at the tip side, and the tip of the curved portion in the elastic portion The curved portion is formed by being folded back so as to be overlapped on the rotor diameter outer side of the rotor diameter inner side portion of the guide portion, and the convex portion of the back plate is placed on the rotor diameter. It has a pressing part that urges outward, and the folding line when the curved part of the elastic part is folded back and formed is set to be orthogonal to the rolling direction of the rolled steel sheet. It is characterized by being.

  In this case, the pad support includes an inner side support portion that supports the brake pad on the inner side, an outer side support portion that supports the brake pad on the outer side, the inner side support portion, and the outer side support portion. Are formed in a line-symmetric shape with a center line in the rotor axial direction as a symmetric axis, and the inner support portion and the outer support portion include the guide portion. It is also possible that the elastic part and the pressing part are respectively formed.

  In the disc brake device according to the present invention, the folding line when the curved portion of the elastic portion is folded back is set so as to be orthogonal to the rolling direction of the rolled steel sheet (material). It is possible to ensure a sufficient durability at the curved portion. In addition, since the curved portion of the elastic portion extends from the flat portion of the elastic portion in the circumferential direction of the rotor and is folded back at the tip side, the shape (development shape) when the pad support is punched from the rolled steel plate The portion that becomes the flat portion of the elastic portion and the portion that becomes the curved portion of the elastic portion are in a straight line along the rolling direction of the rolled steel sheet. The part which becomes and the part which becomes the pressing part are orthogonal to each other, and the developed shape by these four parts becomes a U-shape. For this reason, it can suppress that the shape (development shape) at the time of punching a pad support from a rolled steel plate becomes long in the rolling direction of a rolled steel plate, and it is possible to improve the yield of a rolled steel plate raw material.

It is a front view showing one embodiment of a disc brake device by the present invention. FIG. 2 is a perspective view of the disc brake device shown in FIG. FIG. 3 is a partial longitudinal sectional front view showing a relationship among an outer brake pad, a support (mounting), a pad support and the like shown in FIGS. 1 and 2. It is the fragmentary perspective view which showed the relationship between right side parts, such as an outer side brake pad shown in FIG. 3, a support body (mounting), and a pad support. It is the perspective view seen from the pad side of the pad support shown in FIG. It is the perspective view seen from the support body side of the pad support shown in FIG. FIG. 7 is a front view of the pad support shown in FIGS. 5 and 6. FIG. 8 is a left side view of the pad support shown in FIG. 7. FIG. 8 is a rear view of the pad support shown in FIG. 7. FIG. 8 is a bottom view of the pad support shown in FIG. 7. FIG. 8 is a development view of the pad support shown in FIG. 7. The pad support in the unfolded state shown in FIG. 11 is arranged in a plurality in the same direction so that the folding line when the curved portion of the elastic portion is folded back is perpendicular to the rolling direction of the rolled steel sheet. FIG. The pad support in the unfolded state is formed by folding the curved portion of the elastic portion when the curved portion of the elastic portion extends from the flat portion of the elastic portion in the rotor axial direction and is folded back at the tip side. It is a figure of the state in which the folding line at the time was orthogonally arranged with respect to the rolling direction of a rolled steel plate, and two or more were arranged in the same direction.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 to 10 show an embodiment in which the present invention is implemented in a movable caliper type disc brake device for a vehicle. The disc brake device 100 of this embodiment is assembled to an axle hub (rotating body not shown). A disc rotor 10 (see FIG. 1) that can rotate forward and backward integrally with a wheel (not shown), a support body (mounting) 20 assembled to a vehicle body (not shown), and an outer peripheral portion of the disc rotor 10 A movable caliper 30 that is arranged so as to straddle a part and is movably mounted in the rotor axial direction with respect to the support 20, a single piston 40 that is assembled to the movable caliper 30, an inner brake pad 50, An outer brake pad 60 is provided. In addition, the disc brake device 100 includes a pair of pad supports 70 assembled to the support 20.

  The disc rotor 10 has an annular braked surface 11 that can be clamped by the lining 52 of the inner brake pad 50 and the lining 62 of the outer brake pad 60. The disk rotor 10 is braked for rotation by the braked surface 11 being held between the lining 52 of the inner brake pad 50 and the lining 62 of the outer brake pad 60 during braking. When the wheel rotates forward, the disc rotor 10 rotates in the clockwise direction of FIG. 1 integrally with the wheel (forward rotation), the left side of FIG. 1 is the entrance side, and the right side of FIG. 1 is the exit side. It becomes.

  As shown in FIGS. 1 and 2, the support 20 is provided so as to straddle a part of the outer periphery of the disk rotor 10, and includes an inner support 21 that supports the inner brake pad 50, and an outer The outer side support part 22 which supports the side brake pad 60 is provided integrally. Further, the support 20 is integrally provided with a mounting portion 23 to the vehicle body, and the mounting portion 23 is provided with a pair of mounting holes 23a and 23b.

  As shown in FIGS. 1 and 2, the movable caliper 30 is provided so as to straddle a part of the outer periphery of the disk rotor 10, and includes a cylinder portion 31 on the inner side and a pushing arm portion on the outer side. 32 and a pair of connecting portions 33 and 34 for connecting them. The movable caliper 30 includes a pair of support arm portions 35 and 36 on the inner side, and is connected to the support arm portions 35 and 36 using bolts 37 and 38 and extends in the rotor axial direction (not shown). (Omitted) is attached to the support 20 so as to be movable in the rotor axial direction.

  The piston 40 is assembled to the cylinder portion 31 of the movable caliper 30 so as to be liquid-tight and slidable in the rotor axial direction, so that the inner brake pad 50 can be pushed toward the disc rotor 10. Has been placed. The piston 40 is pushed by hydraulic oil supplied from a brake master cylinder (not shown) to an oil chamber formed between the piston 40 and the cylinder portion 31 when the disk rotor 10 is braked, and the inner brake pad 50 is Can be pressed toward the disk rotor 10 in the rotor axial direction. When the piston 40 pushes / presses the inner brake pad 50 toward the disc rotor 10 in the rotor axial direction, the push arm portion 32 of the movable caliper 30 points the outer brake pad 60 toward the disc rotor 10. Push and push in the rotor axis direction.

  The inner brake pad 50 includes a back plate 51, a lining 52 fixed to the back plate 51, and a shim plate (not shown) assembled to the back surface of the back plate 51. The inner brake pad 50 is disposed between the disc rotor 10 and the piston 40, and is assembled to the support body 20 via a pair of pad supports 70 by a back plate 51 so as to be movable in the rotor axial direction. Yes.

  The outer brake pad 60 includes a back plate 61, a lining 62 fixed to the back plate 61, and a shim plate 63 assembled to the back surface of the back plate 61. Further, the outer brake pad 60 is disposed between the disk rotor 10 and the pushing arm portion 32 of the movable caliper 30, and on the back plate 61 via the pair of pad supports 70 in the rotor axial direction. It is assembled to be movable.

  Each pad support 70 is assembled to the inner side support portion 21 and the outer side support portion 22 of the support body 20, and the rotor circumferential ends of the back plates 51 and 61 in the brake pads 50 and 60 and the support body 20. The brake pads 50 and 60 are interposed between the brake pads 50 and 60 so as to be movable in the rotor axial direction, and elastically restrict the movement of the brake pads 50 and 60 in the rotor radial direction and the rotor circumferential direction.

  By the way, as shown in FIGS. 5 to 10, each pad support 70 is formed by being punched from a rolled steel plate material into a predetermined shape and then bent to form an inner side support that supports the inner side brake pad 50. Part 71, outer side support part 72 that supports outer side brake pad 60, and connecting part 73 that integrally connects inner side support part 71 and outer side support part 72, and the center line in the rotor axial direction It is formed in a line-symmetric shape with Lo (see FIGS. 7 and 9 to 11) as the axis of symmetry.

  The inner side support portion 71 includes a guide portion 71a, an elastic portion 71b, and a pressing portion 71c. The guide portion 71a accommodates a convex portion (not shown) formed at the rotor circumferential end of the back plate 51 so as to be movable in the rotor axial direction, and is formed in a U-shape. A cut-and-raised portion 71a2 for strengthening the fixing to the support 20 is formed in the rotor diameter inner side portion 71a1 of the guide portion 71a.

  The elastic portion 71b has a planar portion 71b1 formed on the end portion side (left side in FIG. 7) of the rotor diameter inner portion 71a1 in the guide portion 71a that is far from the disk rotor, and from the planar portion 71b1 in the rotor circumferential direction. It has a curved portion 71b2 that is formed by extending and folding the tip end side. The fold line (see the two-dot chain line in FIG. 11) when the curved portion 71b2 of the elastic portion 71b is folded back is set to be orthogonal to the rolling direction of the rolled steel sheet that is the material of the pad support 70. Has been.

  The pressing portion 71c is formed continuously at the tip of the curved portion 71b2 in the elastic portion 71b, and the curved portion 71b2 is folded back to form the rotor diameter of the rotor diameter inner side portion 71a1 in the guide portion 71a. It is piled on the outer side, and the convex portion of the back plate 51 is biased toward the outer side of the rotor diameter (the rotor diameter outer side portion of the guide portion 71a).

  Similar to the inner side support part 71, the outer side support part 72 includes a guide part 72a, an elastic part 72b, and a pressing part 72c. The guide part 72a accommodates the convex part 61a (refer FIG. 1, FIG. 3) formed in the rotor circumferential direction edge part of the backplate 61 so that a movement to a rotor axial direction is possible, and it is formed in U shape. Yes. Note that a cut-and-raised portion 72a2 for strengthening the fixing to the support 20 is formed in the rotor diameter inner side portion 72a1 of the guide portion 72a.

  The elastic part 72b has a flat part 72b1 formed on the end part side (right side in FIG. 7) of the rotor diameter inner part 72a1 of the guide part 72a far from the disk rotor, and from the flat part 72b1 in the rotor circumferential direction. It has a curved portion 72b2 that is formed by extending and folding the tip side. The fold line (see the two-dot chain line in FIG. 11) when the curved portion 72b2 of the elastic portion 72b is folded back is set to be orthogonal to the rolling direction of the rolled steel sheet that is the material of the pad support 70. Has been.

  The pressing portion 72c is continuously formed at the tip of the curved portion 72b2 in the elastic portion 72b, and the curved portion 72b2 is folded back to form the rotor diameter of the rotor diameter inner side portion 72a1 in the guide portion 72a. As shown in FIG. 3, the convex portion 61a of the back plate 61 is urged toward the rotor diameter outward (the rotor diameter outward portion of the guide portion 72a).

  The pad support 70 configured as described above is formed by punching from a rolled steel sheet material into a predetermined shape shown in FIG. 11 and then sequentially bending it along each fold line shown by a two-dot chain line in FIG. Since the fold line when the curved portions 71b2 and 72b2 of the elastic portions 71b and 72b are formed by being folded is set so as to be orthogonal to the rolling direction of the rolled steel sheet material, the elastic portions 71b , 72b can ensure the durability at the curved portions 71b2, 72b2.

  In addition, since the curved portions 71b2 and 72b2 of the respective elastic portions 71b and 72b are formed by extending from the flat portions 71b1 and 72b1 of the respective elastic portions 71b and 72b in the circumferential direction of the rotor and folded back at the front end side, the pad support In the shape (development shape) when punching 70 from the rolled steel plate, the portions to be the flat portions 71b1 and 72b1 of the elastic portions 71b and 72b and the portions to be the curved portions 71b2 and 72b2 of the elastic portions 71b and 72b are: Although they are in a straight line along the rolling direction of the rolled steel sheet, the portions that become the rotor diameter inner side portions 71a1 and 72a1 of the guide portions 71a and 72a and the portions that become the pressing portions 71c and 72c, respectively. Since the four parts are orthogonal, the developed shape of each of the four portions is the rotor circumferential side portion of each guide portion 71a, 72a and Is radially outward side portion becomes the guide portions 71a, the rotor radially inner lateral side portions 71a1,72a1 and the pressing portion 71c of the 72a, is accommodated in between 72c and compact U-shaped.

  For this reason, it can suppress that the shape (development shape) at the time of punching the pad support 70 from a rolled steel plate material becomes long in the rolling direction of a rolled steel plate, and the expanded pad support 70 shown in FIG. As shown, a plurality of plates can be arranged and arranged in the same direction along the rolling direction of the rolled steel sheet, and three pieces (plate cutting) can be arranged in a predetermined rolling direction length S. Therefore, it is possible to improve the yield of the rolled steel sheet material as compared with the case where the pad support 170 shown in FIG. 13 is punched from the rolled steel sheet material.

  13 is provided with an inner side support portion 171, an outer side support portion 172, and a connecting portion 173 in the same manner as the pad support 70 described above. Further, in the pad support 170, the curved portions 171b2 and 172b2 of the elastic portions 171b and 172b extend from the flat portions 171b1 and 172b1 of the elastic portions 171b and 172b in the rotor axial direction, and the tip side is folded back. It is comprised so that it may be formed. Further, in the pad support 170, the folding lines when the curved portions 171b2 and 172b2 of the elastic portions 171b and 172b are formed by folding are set so as to be orthogonal to the rolling direction of the rolled steel sheet.

  For this reason, in the pad support 170 in the unfolded state shown in FIG. The portion that becomes the curved portions 171b2 and 172b2 of the elastic portions 171b and 172b and the portion that becomes the pressing portions 171c and 172c are aligned along the rolling direction of the rolled steel sheet. Accordingly, when a plurality of pad supports 170 are aligned and arranged in the same direction along the rolling direction of the rolled steel sheet, only one pad support 170 can be arranged in a predetermined rolling direction length S, compared with the pad support 70 described above. The yield of the rolled steel sheet becomes worse.

  In the above-described embodiment, the present invention is applied to a movable caliper type disc brake device for a vehicle. However, the present invention can be similarly applied to a fixed caliper type disc brake device for a vehicle.

DESCRIPTION OF SYMBOLS 100 ... Disc brake apparatus, 10 ... Disc rotor, 11 ... Brake surface, 20 ... Support body (mounting), 30 ... Movable caliper, 40 ... Piston (pushing member), 50, 60 ... Brake pad, 51, 61 ... Back plate, 61a ... convex part, 52, 62 ... lining, 70 ... pad support, 71 ... inner side support part, 71a ... guide part, 71a1 ... rotor diameter inner side part, 71b ... elastic part, 71b1 ... plane part, 71b2 ... curved portion, 71c ... pressing portion, 72 ... outer side support portion, 72a ... guide portion, 72a1 ... rotor diameter inner side portion, 72b ... elastic portion, 72b1 ... planar portion, 72b2 ... curved portion, 72c ... pressing portion 73 ... connecting part

Claims (2)

A pair of disc rotors that can rotate integrally with the wheels, a support that is assembled to the vehicle body, and a disc rotor that is arranged so as to be sandwiched so that the disc rotor can be moved in the axial direction of the rotor. A brake pad and a pressing member capable of pressing the back plate of each brake pad toward the disk rotor; and the rotor circumferential direction of the back plate in each brake pad assembled to the support In a disc brake device comprising a pad support that is interposed between an end portion and the support and supports the brake pads so as to be movable in the rotor axial direction.
The pad support is formed by being punched from a rolled steel plate into a predetermined shape and then bent and accommodates a convex portion formed at the rotor circumferential end of the back plate so as to be movable in the rotor axial direction. A guide portion having a letter shape and a flat portion formed on the end portion side of the rotor diameter inner side of the guide portion far from the disk rotor, and extending from the flat portion in the circumferential direction of the rotor and folding the tip end side. An elastic portion having a curved portion formed by bending the inner end of the rotor in the guide portion by forming the elastic portion continuously at the tip of the curved portion in the elastic portion and folding the curved portion. A pressing portion that is overlapped on the outer side of the rotor diameter of the side portion and biases the convex portion of the back plate toward the outer side of the rotor, and the curved portion of the elastic portion is folded back. The fold line at the time of being formed Te is set to be perpendicular to the rolling direction of the rolled steel sheet disc brake device according to claim.   2. The disc brake device according to claim 1, wherein the pad support includes an inner side support portion that supports the brake pad on the inner side, an outer side support portion that supports the brake pad on the outer side, and the inner side support. A connecting portion that integrally connects the outer side support portion and the outer side support portion, and is formed in a line-symmetric shape with a center line in the rotor axial direction as a symmetry axis, and the inner side support portion and the outer side support portion The disc brake device according to claim 1, wherein the guide portion, the elastic portion, and the pressing portion are respectively formed in the portion.

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