JP5898489B2 - Disc brake - Google Patents

Description

  The present invention relates to a disc brake that applies a braking force to a vehicle such as an automobile.

  Generally, a disc brake provided in a vehicle such as an automobile has an attachment member (carrier) fixed to a non-rotating part of the vehicle, a pad guide provided so as to face the attachment member, and a central main part. A pair of protrusions protruding in opposite directions from the main portion and supported by the pad guides, respectively, and a pair of pads disposed so as to be sandwiched between the disks and movable relative to the mounting member; The caliper is provided in a straddling position and presses a pair of pads against the disk, and a return spring that urges the pads in a direction away from the disk (see, for example, Patent Document 1).

  According to the prior art, the pad guide is provided with a restricting portion (a restricting piece) that restricts the movement of the pad in the disc axial direction, and the return spring is biased by the contact between the restricting portion and the protruding portion of the pad. This prevents the pad from being removed from the pad guide.

Japanese Utility Model Laid-Open No. 5-14673

  By the way, in the above-described conventional technology, the pad guide restricting portion is formed by bending the edge of the pad guide approximately 90 degrees toward the inside in the radial direction of the disk. In this case, when the pad is assembled to the pad guide, the pad is inclined (non-parallel to the disc) so that the protruding portion of the pad can pass under the restricting portion (in the radial direction of the disc). It is necessary to. In other words, it is necessary to perform complicated work such as making the pad stand up (parallel to the disk) after passing through the protruding portion with the pad inclined, and the workability during assembly is reduced. There is.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a disc brake capable of improving workability when the pad is assembled to the mounting member side. is there.

In order to solve the above-described problems, a disc brake according to the present invention includes an attachment member fixed to a non-rotating portion of a vehicle, a pad guide provided to face the attachment member, a central main portion, and the A pair of protrusions that protrude in opposite directions from the main part and are respectively supported by the pad guides, and that are disposed with the disc interposed therebetween, and are provided so as to be movable with respect to the attachment member, and the attachment A caliper that is provided at a position straddling the member and presses the pair of pads against the disk; and a return spring that urges the pad in a direction away from the disk. A lower plate portion that supports the lower surface of the protruding portion, a pressing portion that supports the pad by pressing the upper surface of the protruding portion of the pad toward the lower plate portion, and the pressing portion and the lower plate portion. And a board part on which a lateral end surface of the protruding part of the pad and the mounting member are in contact with each other, and a restricting part that is provided on the pressing part and restricts movement of the pad in the disc axial direction. In the disc brake provided, the pressing portion extends from the substrate portion outward in the radial direction of the disc and then is folded back inward in the radial direction of the disc, and from the folded portion to the inner side in the radial direction of the disc. An extending portion that extends, and an abutting portion that is bent from the tip of the extending portion and extends in the disk rotation direction and contacts the upper surface of the protruding portion of the pad. from both ends of the output portion, while extending in a direction away from the disk in the disk axial direction, provided are formed on the extending portion and integrally so as to extend toward the inside of the disk radial direction side, the The edge of disk radially inward and tapered portion inclined is formed so as to be separated from the lower plate portion with distance from the disk, the tapered portion, the protruding upper surface of the pad is in contact when the pad in a state moves toward the disk, said folded portion flexed and has a configuration in which the regulating unit Before moving the disc radially outward.

  According to the present invention, workability when the pad is assembled to the pad guide side of the mounting member is improved.

FIG. 2 is a partially broken plan view of the disc brake according to the first embodiment of the present invention as viewed from above. A part of the disc brake as viewed from the direction of arrows II-II in FIG. It is the front view which took out the right side pad guide in FIG. 1, and was seen from the same direction as FIG. It is the front view which looked at the pad guide in FIG. 3 from arrow IV-IV. It is the side view which looked at the pad guide in FIG. 4 from the left side. It is the side view which looked at the pad guide in FIG. 4 from the right side. It is a perspective view equivalent to the (VII) part in Drawing 1 which shows a projection part of a pad, a control part of a pad guide, etc. It is a top view which shows a pad alone. It is the front view which looked at the pad in FIG. 8 from arrow IX-IX. It is a front view equivalent to the arrow XX direction in FIG. 1 which shows the pad of the initial state which attaches a pad to an attachment member, an attachment member, and a pad guide. It is sectional drawing seen from the arrow XI-XI direction in FIG. It is the front view seen from the same direction as FIG. 10 which shows the pad in the middle state which assembles a pad to an attachment member, an attachment member, and a pad guide. It is sectional drawing seen from the arrow XIII-XIII direction in FIG. It is the front view seen from the same direction as Drawing 10 showing the state where the pad was assembled to the attachment member. It is sectional drawing seen from the arrow XV-XV direction in FIG. It is a side view similar to FIG. 5 which shows the pad guide by 2nd Embodiment. It is the perspective view seen from the same direction as FIG. 7 which shows the protrusion part of a pad by 2nd Embodiment, the control part of a pad guide, etc. FIG. It is a side view similar to FIG. 5 which shows the pad guide by a modification. It is the perspective view seen from the same direction as FIG. 7 which shows the protrusion part of the pad by a modification, the control part of a pad guide, etc. FIG.

  Hereinafter, a disc brake according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

  Here, FIG. 1 to FIG. 15 show a first embodiment of the present invention. The disk 1 shown in FIG. 1 rotates in the direction of arrow A in FIGS. 1 and 2 when the vehicle travels in the forward direction, for example, and moves in the direction of arrow A when the vehicle moves backward. Rotates in the opposite direction.

  The attachment member 2 called a carrier is attached to a non-rotating part of the vehicle. As shown in FIGS. 1 and 2, the mounting member 2 extends in the axial direction of the disc 1 (disc axial direction) so as to be spaced apart in the rotational direction of the disc 1 (disc rotational direction) and straddle the outer periphery of the disc 1. A pair of arm portions 2A, 2A and a base end side of each arm portion 2A are connected so as to be integrated and fixed to the non-rotating portion of the vehicle at a position on the inner side of the disk 1 It is comprised including the support part 2B etc. of meat.

  In addition, a reinforcing beam 2C that connects the distal ends of the arms 2A and 2A to each other at a position on the outer side of the disk 1 is integrally formed on the mounting member 2 in a bow shape. Thus, the arm portions 2A and 2A of the mounting member 2 are integrally connected by the support portion 2B on the inner side of the disc 1 and are integrally connected by the reinforcing beam 2C on the outer side.

  Each arm 2A of the mounting member 2 is formed with a disc path portion 3 extending in an arc along the outer periphery (rotation locus) of the disc 1 at a position that is an intermediate portion in the disc axial direction as shown in FIG. Has been. Inner side and outer side pad guide portions 4 are formed on both sides of the disc path portion 3 in the disc axial direction. Each arm 2A is provided with a pin hole 2D (only one is shown in FIG. 2). In these pin holes 2D, slide pins 7 described later are slidably fitted.

  The pad guide portion 4 of each arm portion 2A is formed as a groove portion having an L-shaped cross section as shown in FIG. 2, and extends in a direction in which a later-described pad 10 slides and displaces, that is, a disc axial direction. Projection portions 11B and 11C of a pad 10 described later are slidably engaged with the pad guide portion 4 with a pad guide 15 described later interposed therebetween.

  Thereby, each pad guide part 4 guides the pad 10 in the disk axial direction via these protrusion parts 11B and 11C. The wall surface of the pad guide portion 4 constitutes a torque receiving surface 5 as a so-called torque receiving portion. The torque receiving surface 5 receives a braking torque generated when the brake is operated from the pad 10 through the protruding portions 11B and 11C.

  That is, of the left and right pad guide portions 4 and 4 shown in FIG. 2, the left pad guide portion located on the rotation direction exit side (hereinafter referred to as the unwinding side) of the disk 1 rotating in the arrow A direction. 4, particularly the torque receiving surface 5, a braking torque received by the pad 10, which will be described later, from the disk 1 during a brake operation when the vehicle is moving forward, and a substrate of a protrusion 11 </ b> C of the back plate 11 and a pad guide 15, which will be described later Received via part 18. Further, the right pad guide portion 4, particularly the torque receiving surface 5, which is located on the rotation direction entrance side (hereinafter referred to as the turn-in side) of the disk 1 rotating in the direction indicated by the arrow A, is a brake when the vehicle is moving backward. During operation, a braking torque received by the pad 10 (described later) from the disk 1 is received via the protruding portion 11B of the back plate 11 and a substrate portion 18 of the pad guide 15 (described later).

  A caliper 6 provided at a position straddling the attachment member 2 presses a pair of pads 10 to be described later against the disk 1. The caliper 6 has an inner leg so as to straddle the outer peripheral side of the disc 1 between an inner leg 6A provided on the inner side which is one side of the disc 1 and each arm 2A of the mounting member 2 as shown in FIG. A bridge portion 6B extending from the portion 6A to the outer side, which is the other side of the disc 1, and an inner side in the radial direction of the disc 1 (disc radial direction) from the outer side, which is the tip side of the bridge portion 6B And an outer leg portion 6C as a claw portion having a bifurcated end.

  A cylinder (not shown) into which the piston 6D is slidably inserted is formed on the inner leg portion 6A of the caliper 6. Further, the inner leg portion 6A is provided with a pair of attachment portions 6E and 6E that protrude in the left and right directions in FIG. Each mounting portion 6E supports the entire caliper 6 slidably on each arm portion 2A of the mounting member 2 via a sliding pin 7 described later.

  As shown in FIG. 1, the sliding pin 7 is fastened to each mounting portion 6 </ b> E of the caliper 6 using a bolt 8. The distal end side of each sliding pin 7 extends toward the pin hole 2D of each arm portion 2A of the mounting member 2, and is slidably inserted into each pin hole 2D of the mounting member 2. As shown in FIG. 1, protective boots 9 are respectively attached between the arm portions 2A and the sliding pins 7, and rainwater or the like enters between the sliding pins 7 and the pin holes 2D of the arm portions 2A. Is prevented.

  The inner-side pad 10 and the outer-side pad 10 are arranged with the disc 1 therebetween, and are provided so as to be movable with respect to the mounting member 2. Each pad 10 is configured by a flat plate-like back plate 11 extending in a substantially fan shape in the circumferential direction of the disc 1 (disc rotating direction), a lining 12 as a friction material in frictional contact with the surface of the disc 1, and the like. ing.

  The back plate 11 of the pad 10 has a central main portion 11A and a pair of protruding portions 11B and 11C that protrude in opposite directions from the central main portion 11A. A lining 12 is bonded (fixed) to the surface 11A1 of the main portion 11A of the back plate 11. The protrusions 11B and 11C are formed in a substantially convex shape and are respectively supported by a pad guide 15 described later. The projecting portions 11B and 11C of the back plate 11 constitute a torque transmitting portion that transmits the braking torque received by the pad 10 from the disc 1 to the torque receiving surface 5 of the mounting member 2 when the vehicle is braked. is there.

  The protrusions 11B and 11C of the pad 10 (back plate 11) are formed symmetrically to the left and right as shown in FIG. 9, for example, and have the same shape. One projecting portion 11B is arranged on the rotation direction entrance side (turn-in side) of the disk 1 rotating in the direction indicated by arrow A when the vehicle moves forward, and the other projecting portion 11C is disposed on the rotation direction exit side of the disk 1. It is arranged on the (delivery side).

  Further, on the upper surface 11A2 of the main portion 11A of the back plate 11, locking holes 11D to which return springs 14 to be described later are attached are formed on both sides in the disk rotation direction.

  On the back surface of the pad 10 (the back surface 11A3 of the main portion 11A of the back plate 11 and the back surfaces 11B1 and 11C1 of the protruding portions 11B and 11C), a shim plate 13 for preventing noise is detachably provided. The outer side shim plate 13 is disposed between the outer leg portion 6C of the caliper 6 and the back plate 11, and prevents the two from coming into direct contact with each other, thereby suppressing the occurrence of a so-called brake squeal between them. Is. On the other hand, the inner shim plate 13 is disposed between the piston 6D inserted into the inner leg portion 6A of the caliper 6 and the back plate 11 to suppress the occurrence of brake squeal.

  The pad 10 is provided with a pair of return springs 14 and 14 that urge the pad 10 in a direction away from the disk 1. Each return spring 14 is formed of a wire having spring properties such as spring steel and stainless steel, for example, and has a substantially V shape that expands in a direction away from each other toward the turn-out side or the turn-in side as shown in FIG. It has a letter-shaped (mountain-shaped) main body portion 14A, and a mounting portion 14B that is bent and extends inward in the disk radial direction from the main body portion 14A and is attached to the locking hole 11D.

  As shown in FIGS. 1 and 2, one return spring 14 is provided on the engagement side 11 </ b> D provided on the inner side pad 10 and the outer side pad 10. It is attached to (hangs over) the locking hole 11D. In addition, the other return spring 14 is mounted in a locking hole 11D provided on the output side of the inner side pad 10 and a locking hole 11D provided on the output side of the outer side pad 10 ( Is to be bridged).

  By attaching the return spring 14 to the inner side pad 10 and the outer side pad 10, an elastic force in a direction away from each other is applied to both the pads 10 by the return spring 14. Thereby, when the brake is released, the pad 10 can be quickly separated from the disk 1, and dragging of the pad 10 by the disk 1 can be reduced.

  A pair of pad guides 15, 15 are attached to each arm 2 </ b> A of the attachment member 2 so as to face each other in the disk rotation direction. The pad guides 15 elastically support the inner side and outer side pads 10, respectively, and smooth the sliding displacement of these pads 10 in the disk axial direction. Each pad guide 15 is formed by bending (press forming) a stainless steel plate having spring properties as shown in FIGS.

  The pad guide 15 includes a pair of lower plate portions 16 and 16, a pressing portion 17, a substrate portion 18, and a pair of regulating portions 19 and 19 which will be described later. Here, with respect to each part of the pad guide 15, the attachment member 2 is not necessarily attached to the upper part in the vertical direction with respect to the disk 1, and may be attached to the front side or the rear side of the vehicle with respect to the disk 1. Therefore, in the present application, the terms “upper side”, “upper surface” or “upward” are used to mean the radially outward surface, the radially outward surface or the radially outward direction of the disk 1, ”,“ Lower surface ”or“ downward ”are used to mean the radially inward, radially inward surface or radially inward of the disk 1.

  The pair of lower plate portions 16 constituting the pad guide 15 supports the lower surfaces 11B2 and 11C2 of the protruding portions 11B and 11C of the pad 10. Each lower plate portion 16 is disposed in the inner side pad guide portion 4 and in the outer side pad guide portion 4 so as to be separated from each other in the disk axial direction. The inner side lower plate portion 16 contacts the lower surfaces 11B2 and 11C2 of the protruding portions 11B and 11C of the inner side pad 10, and the outer side lower plate portion 16 is the protruding portion 11B of the outer side pad 10. It is configured to contact the lower surface 11B2 and 11C2 of 11C.

  Each lower plate portion 16 is integrally formed with an insertion guide portion 16A that protrudes in a direction away from the disc 1 in the disc axial direction and whose tip (projecting end) side is inclined obliquely inward in the disc radial direction. . The insertion guide portion 16A is provided to smoothly guide the protrusion portions 11B and 11C when the protrusion portions 11B and 11C of the pad 10 are assembled to the pad guide 15.

  The pressing portion 17 constituting the pad guide 15 supports the pad 10 by pressing the upper surfaces 11B3 and 11C3 of the protruding portions 11B and 11C of the pad 10 toward the lower plate portion 16. The pressing portion 17 includes a pair of folded portions 17A that extend outward in the radial direction of the disk from a connecting plate portion 18B of the substrate 18 that will be described later, and are folded back inward in the radial direction of the disk, and the tip side of each folded portion 17A An extension portion 17B extending inward in the radial direction of the disk, and an abutting contact with the upper surfaces 11B3 and 11C3 of the protrusions 11B and 11C of the pad 10 that are bent from the tip of the extension portion 17B and extended in the disk rotation direction. And a contact portion 17C.

  Here, the extending portion 17B and the contact portion 17C are formed to extend in the disc axial direction so as to straddle the outer peripheral side of the disc 1. Then, the upper surface 11B3 of the protruding portion 11B of the inner side pad 10 abuts on one end side of the abutting portion 17C in the disc axial direction, and the outer side pad 10 of the outer side pad 10 in the disc axial direction other end side of the abutting portion 17C. The upper surface 11B3 of the protruding portion 11B is configured to abut.

  Here, the height dimension B from the lower plate portion 16 to the contact portion 17C is from the lower surface 11B2, 11C2 of the protruding portion 11B, 11C of the pad 10 to the portion of the upper surface 11B3, 11C3 that contacts the contact portion 17C. The height is set slightly smaller than C. Thus, when the protruding portions 11B and 11C of the pad 10 are inserted between the lower plate portion 16 of the pad guide 15 and the pressing portion 17 (abutting portion 17C), the folded portion 17A of the pressing portion 17 has a disc diameter. It is elastically bent and deformed upward in the direction. In this state, the contact portion 17C of the pressing portion 17 elastically biases the protruding portions 11B and 11C of the pad 10 toward the inner side in the disk radial direction (lower plate portion 16), and the pad 10 is attached to the mounting member 2. In contrast, it is possible to suppress rattling in the disk radial direction.

  The board portion 18 constituting the pad guide 15 connects the pressing portion 17 and the lower plate portion 16, and is in contact with the lateral end surfaces 11B4 and 11C4 of the protruding portions 11B and 11C of the pad 10 and the mounting member 2. It is. Here, as shown in FIG. 6, the substrate portion 18 is formed in a substantially U shape as a whole, and includes a pair of contact plate portions 18 </ b> A that are spaced apart in the disk axial direction, and the pair of contact plate portions 18 </ b> A. The contact plate portion 18A is roughly constituted by a connecting plate portion 18B for connecting the contact plate portion 18A in the disk axial direction.

  The inner contact plate portion 18A of the pair of contact plate portions 18A is in contact with the lateral end surface 11B4, which is the disk rotation direction surface of the protruding portion 11B of the inner pad 10, and the rear surface thereof. However, it contacts the wall surface (torque receiving surface 5) of the pad guide portion 4 on the inner side. On the other hand, the outer-side contact plate portion 18A comes into contact with the lateral end surface 11B4, which is the disk rotation direction surface of the protruding portion 11B of the outer-side pad 10, and its rear surface is the outer-side pad guide. It contacts the wall surface (torque receiving surface 5) of the portion 4.

  Each contact plate portion 18A protrudes from each contact plate portion 18A in the direction away from the disk 1 in the disk axial direction, and the tip (projection end) side extends in an axial direction inclined obliquely outward in the disk rotation direction. The installation portion 18C is integrally formed. The axially extending portion 18C is inserted into the pad 10 together with the insertion guide portion 16A of the lower plate portion 16 when the protruding portions 11B and 11C of the pad 10 are inserted between the lower plate portion 16 and the pressing portion 17 of the pad guide 15. The protrusions 11B and 11C are smoothly guided.

  The connecting plate portion 18B of the substrate portion 18 extends in the disc axial direction in a state of straddling the outer peripheral side of the disc 1 in order to integrally connect the contact plate portions 18A on the inner side and the outer side of the disc 1. Is formed. At both ends in the length direction of the connecting plate portion 18B, each contact plate portion 18A extends inward in the radial direction of the disk 1 and is integrally formed.

  An engaging plate portion 18D is formed integrally with the connecting plate portion 18B at an intermediate portion in the disk axial direction of the connecting plate portion 18B. The engagement plate portion 18D is attached to the attachment member 2 so as to engage with the disk path portion 3 of the arm portion 2A from the inside in the radial direction. Thereby, the pad guide 15 is positioned in the disc axial direction with respect to the arm portion 2 </ b> A of the mounting member 2.

  A pair of restricting portions 19, 19 constituting the pad guide 15 are provided in the pressing portion 17 to restrict the movement of the pad 10 in the disc axial direction, that is, the movement of the pad 10 in the direction away from the disc 1. . As shown in FIG. 5, the restricting portions 19 are provided at both ends of the extending portion 17B of the pressing portion 17 in the disk axial direction and extending in the same direction as the extending direction of the extending portion 17B. Specifically, the restricting portion 19 extends from both ends of the extending portion 17B in a direction away from the disc 1 in the disc axial direction and extends to the extending portion 17B so as to extend inward in the disc radial direction. It is integrally formed. A notch portion 20 that is notched in a substantially U shape is formed at the connecting portion between the restricting portion 19 and the extending portion 17B. Thereby, the contact portion 17C can be formed by folding back the portion sandwiched by the notch 20 inside the extending portion 17B in the radial direction of the disc toward the outside in the radial direction of the disc.

  Here, the restricting portion 19 in the present embodiment is provided with a tapered portion 19A. The taper portion 19 </ b> A is formed on the lower surface of the restricting portion 19, that is, on the inner edge of the restricting portion 19 in the disk radial direction so as to be separated from the lower plate portion 16 as the distance from the disc 1 increases. Thereby, the control part 19 is formed in the substantially triangular shape.

  More specifically, the height dimension D on the proximal end side of the taper portion 19A, that is, the height dimension D from the end portion 19A1 on the disk 1 side (notch portion 20 side) to the lower plate portion 16 is determined by the pad 10. Are set to be smaller than the height C of the projecting portions 11B and 11C. As a result, even if the pad 10 is urged away from the disk 1 in the disk axial direction by the return spring 14 after the pad 10 is assembled, the back surfaces 11B1 and 11C1 of the protrusions 11B and 11C of the pad 10 By contacting the portion 19A1, the movement of the pad 10 is restricted, and the pad 10 can be prevented from falling off the pad guide 15.

  On the other hand, the height dimension E on the distal end side of the tapered portion 19A, that is, the height dimension E from the insertion side end portion 19A2 on the insertion side when the pad 10 is inserted to the lower plate portion 16 is the height on the proximal end side. It is set larger than the dimension D. Thereby, the lower surface (lower end edge) of the restricting portion 19, that is, the tapered portion 19A of the restricting portion 19 is inclined obliquely downward from the insertion side end portion 19A2 of the pad 10 toward the end portion 19A1 on the disk 1 side. Is formed.

  Thus, when the pad 10 is assembled to the pad guide 15, the taper portion 19A is abutted against the upper surfaces 11B3 and 11C3 of the protrusions 11B and 11C of the pad 10 and is smoothly slid and assembled in the disk axial direction. Can do. The height dimension E is set to be larger than the height dimension C of the protrusions 11B and 11C of the pad 10. Thereby, when inserting the pad 10, since the opening of an insertion opening can be taken large, assembly workability | operativity can be made favorable.

  The disc brake according to the present embodiment has the above-described configuration, and the operation thereof will be described next.

  First, at the time of brake operation of the vehicle, the piston 6D is slid toward the disc 1 by supplying brake fluid pressure to the inner leg portion 6A (cylinder) of the caliper 6. As a result, the inner pad 10 is pressed against one side of the disk 1. At this time, since the caliper 6 receives a pressing reaction force from the disk 1 through the piston 6D, the entire caliper 6 slides and displaces toward the inner side with respect to the arm portion 2A of the mounting member 2. For this reason, the outer side pad 10 is pressed against the other side of the disk 1 by the outer leg 6 </ b> C.

  Thus, the caliper 6 causes the disc 1 rotating in the direction indicated by the arrow A in FIG. 1 and FIG. 2 (when the vehicle is moving forward) to the both sides in the axial direction between the inner and outer pads 10. Thus, the disc 1 can be given a braking force. When the brake operation is released, the hydraulic pressure supply to the piston 6D is released, and the inner and outer pads 10 are separated from the disk 1 by the urging force of the return spring 14, and return to the non-braking state again. .

  In this case, the protrusions 11B and 11C of the pad 10 are slidably inserted into the pad guide portions 4 and 4 located on the turn-in side and the turn-out side of the disc 1 via the pad guide 15, The portion 17 is biased inward in the disk radial direction. Thereby, the protrusion parts 11B and 11C of the pad 10 are elastically pressed to the lower plate part 16 side. For this reason, it is possible to restrict the pad 10 from rattling in the radial direction of the disk due to vibration or the like during traveling by the pressing portion 17 of the pad guide 15. When the brake is operated, the protruding portions 11B and 11C of the pad 10 can be smoothly guided in the disc axial direction between the pressing portion 17 and the lower plate portion 16.

  By the way, the regulation part of the pad guide of the prior art is formed by bending approximately 90 degrees from both ends of the pressing part inward in the disk radial direction. Therefore, when the pad is assembled to the pad guide, The pad must be made to stand (vertically) after passing the projecting portion below the restricting portion, and there is a problem that the assembling work of the pad becomes complicated and the manufacturing efficiency deteriorates.

  Therefore, in the present embodiment, the tapered portion 19 </ b> A is provided in the restricting portion 19 of the pad guide 15. In this case, the restricting portion 19 of the pad guide 15 is formed as a tapered portion 19 </ b> A that is inclined so as to be separated from the lower plate portion 16 as the lower end edge thereof is separated from the disk 1. At the same time, the height dimension E of the insertion side end 19A2 of the tapered portion 19A is set to be larger than the height dimension C of the protruding portions 11B and 11C of the pad 10. Thus, the protrusions 11B and 11C of the pad 10 can be inserted into the pad guide 15 while the pad 10 is standing upright, that is, in a positional relationship parallel to the disk 1 (without tilting). Yes.

  A procedure for assembling the pad 10 to the mounting member 2 will be described with reference to FIGS. 10 to 15 exemplify a state in which the protruding portion 11B on the right side of the inner side pad 10 (on the side of entering the disc 1) is inserted into the pad guide 15.

  First, prior to assembling the pad 10 to the attachment member 2, the pad guide 15 is attached to the pad guide portion 4 of the attachment member 2. Then, the protruding portion 11 </ b> B of the pad 10 is inserted between the lower plate portion 16 and the pressing portion 17 of the pad guide 15. At this time, the protruding portion 11B is guided by the insertion guide portion 16A of the lower plate portion 16 of the pad guide 15 and the axially extending portion 18C of the substrate portion 18, and as shown in FIGS. 15 is inserted between the lower plate portion 16 and the restriction portion 19. In this state, the upper surface 11B3 of the protruding portion 11B of the pad 10 abuts on the tapered portion 19A of the restricting portion 19 and the pad 10 is parallel to the disk 1.

  When the pad 10 is pushed (slid in the direction indicated by arrow F) toward the disk 1 from the state shown in FIGS. 10 and 11, as shown in FIGS. 12 and 13, the protrusion 11B is pushed. The tapered portion 19A contacting the upper surface 11B3 of the protruding portion 11B is pressed outward in the disk radial direction by the upper surface 11B3 of the protruding portion 11B, and the restricting portion 19 is pushed upward together with the pressing portion 17 (outward in the disk radial direction). Bend (bend). At this time, the pad 10 can be pushed in the disc axial direction while maintaining the positional relationship parallel to the disc 1 without tilting the protruding portion 11B to pass the lower side of the restricting portion 19.

  From the state shown in FIG. 12 and FIG. 13, when the pad 10 is further pushed in and the protruding portion 11B of the pad 10 is inserted closer to the disc 1 side than the end portion 19A1 on the disc 1 side of the tapered portion 19A of the restricting portion 19, As shown in FIGS. 14 and 15, the upper surface 11 </ b> B <b> 3 of the protruding portion 11 </ b> B of the pad 10 contacts the contact portion 17 </ b> C of the pressing portion 17. At this time, the pressing portion 17 and the restricting portion 19 that have been pushed upward are directed downward (inward in the disk radial direction) by releasing the pushing-up due to the contact between the upper surface 11B3 of the protruding portion 11B and the tapered portion 19A. The contact portion 17C of the pad guide 15 and the upper surface 11B3 of the protruding portion 11B contact each other.

  Here, the height dimension B from the contact portion 17 </ b> C to the lower plate portion 16 is set slightly smaller than the height dimension C of the protruding portion 11 </ b> B of the pad 10. Thereby, the contact portion 17C of the pressing portion 17 elastically biases the protruding portion 11B of the pad 10 toward the inner side in the disk radial direction (lower plate portion 16), and the pad 10 is against the mounting member 2. Shaking in the disk radial direction can be suppressed.

  Further, the height dimension D between the end portion 19A1 on the disk 1 side of the tapered portion 19A and the lower plate portion 16 is set to be smaller than the height dimension C of the protruding portion 11B of the pad 10. For this reason, even if the pad 10 slides and moves outward in the disk axial direction, the back surface 11B1 of the protruding portion 11B of the pad 10 abuts on the end 19A1 on the disk 1 side of the taper portion 19A. The movement of the pad 10 in the direction away from the disk 1 can be restricted. As a result, the pad 10 can be prevented from falling off the pad guide 15.

  If each of the inner side and outer side pads 10 is assembled to the pad guide 15, one return spring 14 is inserted into the engaging hole 11D provided on the inner side pad 10 and the outer side pad 10 on the retraction side. The mounting portion 14B is locked, and the mounting portion 14B of the other return spring 14 is locked in the locking hole 11D on the turn-in side of the inner pad 10 and the outer pad 10. When the return spring 14 is mounted, the inner side and outer side pads 10 are given a biasing force in a direction away from each other (a direction away from the disk 1) by the return spring 14, and the inner side and outer side based on this biasing force are applied. The displacement of each pad 10 on the side is limited by the back surfaces 11B1 and 11C1 of the protruding portions 11B and 11C coming into contact with the restricting portion 19.

  When the pad guide 15 is attached to the attachment member 2 and the inner side pad 10 and the outer side pad 10 are assembled, the caliper 6 and the like are attached to the attachment member 2 to thereby obtain a disc as shown in FIGS. You can assemble the brake.

  According to the present embodiment, the pad 10 can be pushed into the pad guide 15 in the disc axial direction while the pad 10 is standing upright (parallel to the disc 1) by the tapered portion 19A formed in the restricting portion 19 of the pad guide 15. Therefore, workability when the pad 10 is assembled to the pad guide 15 side of the mounting member 2 can be improved.

  Further, when the pad 10 is assembled to the mounting member 2, the pressing portion 17 (folded portion 17A) is bent by the contact between the upper surfaces 11B3 and 11C3 of the projecting portions 11B and 11C and the tapered portion 19A, and the regulating portion 19 is pressed. The portion 17 (contact portion 17C) can be lifted upward in the disk radial direction. For this reason, when the pad 10 is assembled, a process of lifting the pressing portion 17 upward in the radial direction of the disk prior to assembling the pad 10 becomes unnecessary, facilitating the assembling work of the pad 10, and automatic assembly. The machine can be simplified.

  Next, FIG. 16 and FIG. 17 show a second embodiment of the present invention. The feature of this embodiment is that the taper portion in the restricting portion of the pad guide is formed as an arc portion. In the present embodiment, the same components as those in the first embodiment described above are denoted by the same reference numerals, and the description thereof is omitted.

  The pair of restricting portions 31 and 31 of the pad guide 15 are formed in place of the restricting portion 19 according to the first embodiment. As shown in FIG. 16, the restricting portion 31 is provided at both ends of the extending portion 17B of the pressing portion 17 in the disk axial direction so as to extend in the same direction as the extending direction of the extending portion 17B. Specifically, the restricting portion 31 is integrally formed on the upper side of the extending portion 17B so as to extend outward in the disk axial direction on the same plane from the extending portion 17B and toward the inner side in the disk radial direction. It is extended. A notch portion 20 that is notched in a substantially U shape is formed at the connecting portion between the restricting portion 31 and the extending portion 17B. Thereby, the contact portion 17C can be formed by folding back the portion sandwiched by the notch 20 inside the extending portion 17B in the radial direction of the disc toward the outside in the radial direction of the disc.

  A circular arc portion 31 </ b> A is formed on the lower surface of the restricting portion 31, that is, on the inner side in the disc radial direction of the restricting portion 31, as a tapered portion that is separated from the lower plate portion 16 as it is separated from the disc 1.

  Specifically, the arc portion 31A is formed as a smooth semi-arc-shaped arc surface by folding a taper portion as a lower surface of the restricting portion 31 approximately 180 degrees upward in the disk radial direction.

  According to the second embodiment, since the lower surface of the restricting portion 31 that contacts the upper surfaces 11B3 and 11C3 of the protrusions 11B and 11C of the pad 10 is formed as the arc portion 31A, the pad 10 is formed as a pad. When assembled to the guide 15, the slidability of the upper surfaces 11B3 and 11C3 of the protrusions 11B and 11C of the pad 10 and the arc portion 31A is improved, and the pad 10 can be smoothly slid and moved to the pad guide 15. Further, when the pad 10 is inserted, the contact friction between the upper surfaces 11B3 and 11C3 of the protruding portions 11B and 11C of the pad 10 and the arc portion 31A can be reduced, so that the upper surfaces of the protruding portions 11B and 11C are reduced. The wear of 11B3 and 11C3 can be reduced.

  In the first embodiment described above, a U-shaped notch 20 is formed between the lower side of the restricting portion 19 and the lower side of the extending portion 17B. The contact portion 17C has been described by taking as an example the one that is bent from the tip (lower end) of the extension portion 17B and can be extended in the disk rotation direction. However, the present invention is not limited to this. For example, a slit 41 is formed between the lower side of the restricting portion 19 and the lower side of the extending portion 17B as in the modified examples shown in FIGS. The 17 abutting portions 17C may be bent from the tip (lower end) of the extending portion 17B and extended in the disc rotating direction.

  Further, the case where the folded portion 17A of the pressing portion 17 of the pad guide 15 is formed in a substantially U shape and the pad 10 is biased inward in the disk radial direction has been described as an example. However, the present invention is not limited to this, and the folded portion 42A of the pressing portion 42 may be formed to have a substantially U-shaped cross section, for example, as in the modification shown in FIGS. This modification also applies to the second embodiment.

1 disc 2 mounting member (carrier)
4 Pad guide portion 6 Caliper 10 Pad 11 Back plate 11A Main portion 11B, 11C Protruding portion 12 Lining 14 Return spring 15 Pad guide 16 Lower plate portion 17, 42 Pressing portion 17A, 42A Folding portion 17B Extending portion 17C Abutting portion 18 Substrate part 19, 31 Restriction part 19A Taper part 31A Arc part

Claims (1)

An attachment member fixed to a non-rotating part of the vehicle;
A pad guide provided so as to face the mounting member;
A pair having a central main portion and a pair of protruding portions that protrude in opposite directions from the main portion and are respectively supported by the pad guides, are disposed with a disc interposed therebetween, and are provided so as to be movable with respect to the mounting member. Pad and
A caliper provided at a position straddling the mounting member and pressing the pair of pads against the disk;
A return spring that biases the pad in a direction away from the disk,
The pad guide is
A lower plate portion supporting the lower surface of the protruding portion of the pad;
A pressing portion that supports the pad by pressing the upper surface of the protruding portion of the pad toward the lower plate portion;
A substrate portion that connects the pressing portion and the lower plate portion and contacts a lateral end surface of the protruding portion of the pad and the mounting member;
In a disc brake comprising: a restricting portion that is provided in the pressing portion and restricts movement of the pad in the disc axial direction.
The pressing portion is
A folded portion extending from the substrate portion outward in the disk radial direction and then folded back inward in the disk radial direction;
An extending portion extending inward in the radial direction of the disk from the folded portion;
A contact portion that is bent from the tip of the extension portion and extends in the disk rotation direction to contact the upper surface of the protruding portion of the pad;
The restricting portion extends from both ends of the extending portion in a direction away from the disc in the disc axial direction and is formed integrally with the extending portion so as to extend inward in the disc radial direction. is, tapered portion inclined is formed so as to be separated from the lower plate portion in accordance with the edge of the disk radially inward away from said disk,
The tapered portion bends the folded portion and moves the restricting portion outward in the radial direction of the disk when the pad moves toward the disk while the upper surface of the protruding portion of the pad is in contact. Disc brake characterized by letting

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