JP5759793B2 - 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.

  In general, a disc brake provided in a vehicle such as an automobile has a pair of arms spaced apart in the rotational direction of the disc and straddling the outer peripheral side of the disc in the axial direction, and an attachment member attached to a non-rotating portion of the vehicle, A caliper that is slidably provided on each arm portion of the mounting member and presses a pair of friction pads against both sides of the disk, and a pair of friction pads that are respectively attached to the arm portions of the mounting member between the arm portions. It is comprised by the pad spring etc. which support elastically (for example, refer patent document 1).

  Further, by providing an urging spring as a rotational direction urging member at the ear portion of the friction pad, the tip end side of the urging spring is elastically brought into contact with the mounting member side via the pad spring, A structure in which the friction pad is urged toward the outlet side (circumferential direction) in the rotation direction of the disk is also known (see, for example, Patent Document 2).

JP 2007-146969 A JP 2011-12713 A

  By the way, in the above-described prior art, the pad spring is attached to each arm portion side of the attachment member, and the urging spring is attached to the ear portion of the friction pad, and the ear portion of the friction pad is attached to the arm portion ( When trying to assemble the pad guide), there is a problem in that the urging spring interferes with the workability at the time of assembling.

  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 friction pad is assembled to the mounting member side.

  In order to solve the above-described problems, the disc brake according to the present invention is guided in the axial direction of the disc in a state in which a pair of friction pads are unevenly fitted and attached to a non-rotating portion of the vehicle straddling the outer peripheral side of the disc in the axial direction. An attachment member provided with a pad guide to be mounted; a caliper provided slidably on the attachment member; a pad spring attached to the attachment member for elastically supporting the friction pads; and the friction pads. A rotation direction urging member that abuts against the pad spring and urges each friction pad in the rotation direction of the disk, and the pad spring is fitted and attached to a pad guide of the attachment member. A guide plate portion that guides the friction pad in the axial direction of the disk, and is provided extending from the guide plate portion and biases the friction pad in the radial direction of the disk. A radial urging portion, and a first extending portion extending in the axial direction of the disk from the guide plate portion, and the first extending portion is folded back at the distal end side of the first extending portion. A curled portion, a second extending portion that extends in a direction approaching the disk from the curled portion and contacts the friction pad, and a center direction of the friction pad in the circumferential direction of the disc from the second extending portion. A protruding protrusion is formed.

  According to the present invention, workability when the friction pad is assembled to the pad guide side of the mounting member together with the rotation direction biasing member can be improved by the protrusion formed on the radial biasing portion of the pad spring. it can.

It is the top view which looked at the disc brake by embodiment of this invention from upper direction. FIG. 2 is a partially broken front view of the disc brake as viewed from the direction of arrows II-II in FIG. 1. It is a front view which shows the pad spring in FIG. 2 as a single unit. It is the top view which looked at the pad spring of FIG. 3 from the upper side. FIG. 4 is a left side view of the pad spring of FIG. 3 as viewed from the left side. It is the rear view which looked at the attachment member to which the friction pad of an inner side is attached from the inner side with a pad spring. It is the fragmentary top view which looked at the inner side of the pad spring to which the friction pad of the inner side was attached from upper direction.

  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. 7 show an embodiment of the present invention. In the figure, reference numeral 1 denotes a rotating disk. For example, when the vehicle travels in the forward direction, the disk 1 rotates in the direction of arrow A in FIG. It rotates in the direction opposite to the arrow A direction.

  Reference numeral 2 denotes an attachment member attached to a non-rotating portion of the vehicle. As shown in FIGS. 1 and 2, the attachment member 2 is spaced apart in the rotation direction (circumferential direction) of the disk 1 and straddles the outer periphery of the disk 1. A pair of arm portions 2A, 2A extending in the axial direction of the disk 1 and the base end side of each arm portion 2A are connected so as to be integrated, and at the position on the inner side of the disk 1 of the vehicle A thick support portion 2B fixed to the non-rotating portion is included.

  Further, a reinforcing beam 2C for connecting 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 as shown in FIG. 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.

  As shown in FIG. 2, each arm portion 2 </ b> A of the attachment member 2 has a disk path portion 3 that extends in an arc along the outer periphery (rotation locus) of the disk 1 at a position that is an intermediate portion in the axial direction of the disk 1. Is formed. Inner side and outer side pad guides 4 are respectively formed on both sides in the axial direction of the disk 1 of the disk path portion 3. 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 4 of each arm portion 2A is formed as a concave groove having a U-shaped cross section as shown in FIG. 2, and extends in a direction in which a friction pad 10 described later slides, that is, in the axial direction of the disk 1. The pad guide 4 is unevenly fitted to the ear portions 11A and 11B so as to sandwich the ear portions 11A and 11B of the friction pad 10 described later from above and below (disk radial direction).

  Thereby, each pad guide 4 guides the friction pad 10 in the disc axial direction via these ear portions 11A and 11B. The back side wall surface of the pad guide 4 formed of a concave groove constitutes a torque receiving surface 5 as a so-called torque receiving portion. The torque receiving surface 5 receives a braking torque generated during a brake operation from the friction pad 10 via the ear portions 11A and 11B.

  That is, among the left and right pad guides 4 and 4 shown in FIG. 2, the left pad guide 4 positioned on the rotation direction outlet side (hereinafter referred to as the unwinding side) of the disk 1 rotating in the arrow A direction, In particular, the torque receiving surface 5 on the bottom side receives the braking torque received by the friction pad 10 (described later) from the disc 1 during brake operation via the ear portion 11B of the back plate 11 and the guide plate portion 18 of the pad spring 14 (described later). I accept. Further, the bottom side of the pad guide 4, that is, 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 arrow A direction, is a friction pad by an urging spring 20 described later. It arrange | positions in the state slightly spaced apart from 10 ear | edge parts 11A.

  The caliper 6 is slidably provided on the mounting member 2. 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 outer side which is the tip side of the bridge portion 6B, extending inward in the radial direction of the disc 1; And an outer leg portion 6C as a claw portion.

  The inner leg portion 6A of the caliper 6 is formed with a cylinder (not shown) into which the piston is slidably fitted. Further, the inner leg portion 6A is provided with a pair of attachment portions 6D and 6D that protrude in the left and right directions in FIG. Each mounting portion 6D 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> D 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 can slide in each pin hole 2D of the mounting member 2 as illustrated in FIG. Is inserted. 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 friction pad 10 and the outer side friction pad 10 are arranged to face both surfaces of the disk 1. As shown in FIGS. 1, 2, 6, and 7, each friction pad 10 includes a flat plate-like back plate 11 that extends in a substantially fan shape in the circumferential direction (rotation direction) of the disk 1, and the back plate 11. And a lining 12 (see FIGS. 2 and 7) as a friction material that is fixedly attached to the surface of the disk 1 and frictionally contacts the surface of the disk 1.

  The back plate 11 of the friction pad 10 is provided with ear portions 11 </ b> A and 11 </ b> B as fitting portions having convex shapes on side surface portions located on both sides in the circumferential direction of the disk 1. The ear portions 11A and 11B of the back plate 11 constitute a torque transmission portion that transmits the braking torque received by the friction pad 10 from the disc 1 to the torque receiving surface 5 of the mounting member 2 when the vehicle is braked. . Further, on the ear portions 11A and 11B side of the back plate 11, a crimping portion 11C (shown by a dotted line in FIG. 6) for fixing a biasing spring 20 described later is formed.

  The ear portions 11A and 11B of the friction pad 10 (back plate 11) are formed symmetrically left and right as shown in FIGS. 6 and 7, for example, and have the same shape. One ear 11A is arranged on the rotation direction entrance side (turn-in side) of the disk 1 rotating in the direction of arrow A when the vehicle moves forward, and the other ear 11B is on the rotation direction exit side of the disk 1 It is arranged on the (delivery side). Of the left and right ear portions 11A and 11B that serve as torque transmission portions of the friction pad 10, the ear portion 11A that is located on the side of the disk 1 is provided with a biasing spring 20 that will be described later via the caulking portion 11C. It has been.

  A cutout groove 13 is provided in the ear portion 11 </ b> A of the back plate 11. As shown in FIG. 6, the cutout groove 13 is formed by partially cutting out the protruding side (front end side) end surface of the ear portion 11A in an L shape, and houses a part of a biasing spring 20 described later. A storage groove is formed. As shown in FIG. 6, the cutout groove 13 is arranged at a position that is closer to the outside in the radial direction than the center position in the width direction of the ear portion 11 </ b> A (the radial direction of the disk 1).

  Further, the notch groove 13 is also formed in the ear portion 11B located on the delivery side of the disk 1 in the same manner as the ear portion 11A on the entry side. As a result, the friction pad 10 can share parts on the inner side and the outer side of the disk 1, reducing the number of parts of the disk brake and eliminating the manufacturing complexity. It becomes possible.

  A pair of pad springs 14, 14 are attached to each arm 2 </ b> A of the attachment member 2. The pad springs 14 elastically support the inner and outer friction pads 10 and smooth the sliding displacement of the friction pads 10 in the disk axial direction. Each pad spring 14 is formed by bending (press forming) a stainless steel plate having spring properties as shown in FIGS.

  The pad spring 14 includes a connecting plate portion 15, a flat plate portion 16, an engagement plate portion 17, a guide plate portion 18, and a radial biasing portion 19 which will be described later. Regarding the respective parts of the pad spring 14, in the following description, the terms “upper”, “upper surface” or “upward” mean the radially outer side, the radially outer surface or the radially outer side of the disk 1. As used herein, the terms “lower”, “lower” or “downward” are used to mean the radially inner side, the radially inner surface or the radially inward direction of the disk 1.

  The connecting plate portion 15 of the pad spring 14 connects the pair of flat plate portions 16 of the pad spring 14 together with each guide plate portion 18, that is, each guide plate portion 18 is connected between the inner side and the outer side of the disk 1. In order to connect integrally, it extends in the axial direction in a state of straddling the outer peripheral side of the disk 1. A pair of flat plate portions 16, 16 extend inward in the radial direction of the disk 1 and are integrally formed at both ends in the length direction of the connecting plate portion 15. The engaging plate portion 17 is located between the pair of flat plate portions 16 and 16 and is formed integrally with the connecting plate portion 15. The engagement plate portion 17 is attached to the attachment member 2 so as to engage with the disk path portion 3 of the arm portion 2A from the radially inner side. As a result, the pad spring 14 is positioned in the axial direction of the disk 1 with respect to the arm 2 </ b> A of the mounting member 2.

  The pair of guide plate portions 18 and 18 are provided on both end sides of the connecting plate portion 15 via the flat plate portions 16. Each guide plate portion 18 is formed by being bent into a substantially U shape from the lower end (front end side) of the flat plate portion 16. One guide plate portion 18 of the pair of guide plate portions 18 is fitted and attached in the inner side pad guide 4, and the other guide plate portion 18 is fitted to the outer side pad guide 4. Mounted.

  Each guide plate portion 18 connects the upper surface plate 18A and the lower surface plate 18B arranged to face the upper and lower wall surfaces of the pad guide 4 and the upper surface plate 18A and the lower surface plate 18B in the radial direction of the disk 1. In addition, the guide bottom plate 18C extends in the axial direction of the disk 1 in a flat surface shape and contacts the back side wall surface (that is, the torque receiving surface 5) of the pad guide 4, and the guide bottom plate 18C An axially extending portion 18 </ b> D that extends outward in the axial direction and whose front end side is inclined obliquely outward in the circumferential direction of the disk 1 is configured.

  Further, the upper surface plate 18A of the guide plate portion 18 protrudes toward the outer side in the axial direction of the disk 1 and the front end (projecting end) side is inclined obliquely upward in FIG. 5 (that is, radially outward of the disk 1). An insertion guide portion 18E is integrally formed. The insertion guide portion 18E has the ear portion 11A together with the axially extending portion 18D when the ear portions 11A and 11B of the friction pad 10 are inserted between the upper surface plate 18A and the lower surface plate 18B of the guide plate portion 18. , 11B is provided to smoothly guide the inside of the guide plate 18.

  A pair of radial urging portions 19 for urging the ear portions 11A and 11B of each friction pad 10 toward the radially outer side of the disk 1 (that is, the upper side in FIG. 5) is a lower surface plate of each guide plate portion 18. It extends from 18B. Here, the radial urging portion 19 has a first extending portion 19A extending from the lower surface plate 18B of the guide plate portion 18 to the outer side in the axial direction of the disk 1, and a front end side of the first extending portion 19A substantially C. A curled portion 19B formed by folding back in a letter shape or a substantially U shape, and extending in a direction approaching the disk 1 from the curled portion 19B and inclined obliquely upward (that is, radially outward of the disk 1) and friction A second extending portion 19C with which the ear portions 11A, 11B of the pad 10 abut, and a portion extending in the longitudinal direction of the second extending portion 19C protrudes inward in the circumferential direction of the disk 1 (that is, in the center direction of the friction pad 10). And a protrusion 19D inclined obliquely downward.

  The curled portion 19B of the radial urging portion 19 is folded back from the front end side of the first extending portion 19A obliquely downward so as to form a substantially C shape or a substantially U shape, It is constituted by a flat surface portion 19B2 which is located on the upper end side of the folded portion 19B1 and has a flat shape. That is, the upper surface side of the curled portion 19B that is closer to the outer side in the radial direction of the disk 1 has the ear portion 11A in a state where the radial urging portion 19 is free as shown in FIG. 6 (that is, the state before the friction pad 10 is attached). , 11B is a flat surface portion 19B2 so as to abut flatly. The flat surface portion 19B2 is bent so as to be, for example, a flat surface parallel to the lower surface plate 18B of the guide plate portion 18, and the second extending portion 19C extends obliquely upward from the front end side of the flat surface portion 19B2. Yes.

  The protruding portion 19D of the radial urging portion 19 is disposed at a position near the flat surface portion 19B2 of the curled portion 19B in the second extending portion 19C, and the insertion guide portion 18E of the guide plate portion 18 is shown in FIG. As shown in the figure, they are arranged at positions substantially opposite in the upper and lower directions. The protrusion 19D of the radial urging portion 19 is an axially extending portion when the ear portions 11A and 11B of the friction pad 10 are inserted between the upper surface plate 18A and the lower surface plate 18B of the guide plate portion 18. Together with 18D and the insertion guide portion 18E, it has a function of smoothly guiding the ear portions 11A and 11B to the inside of the guide plate portion 18.

  When the ear portions 11A and 11B of the friction pad 10 are inserted between the upper surface plate 18A and the lower surface plate 18B of the guide plate portion 18, the radial urging portion 19 is indicated by a two-dot chain line in FIG. It is elastically bent and deformed in the direction of arrow C. That is, the radial urging portion 19 is elastically deformed so that the second extending portion 19C is sandwiched between the ear portions 11A and 11B of the friction pad 10 and the lower surface plate 18B. In this state, the second extending portion 19C of the radial urging portion 19 elastically urges the ear portions 11A and 11B of the friction pad 10 (back plate 11) toward the radially outer side of the disk 1, The friction pad 10 prevents the mounting member 2 from rattling in the disk radial direction. The radial urging portion 19 elastically urges the ear portions 11A and 11B toward the radially outer side of the disk 1, but is not limited thereto, and extends from the upper surface plate 18A of the guide plate portion 18. The ears 11 </ b> A and 11 </ b> B may be elastically biased toward the inner side in the radial direction of the disk 1.

  For example, as shown in FIG. 6, the biasing spring 20 as the rotation direction biasing member is based on an ear portion 11 </ b> A that becomes the disk entry side when the vehicle moves forward, among the ear portions 11 </ b> A and 11 </ b> B of the back plate 11 of the friction pad 10. The end side is fixed by means such as caulking. The method of fixing the urging spring 20 to the back plate 11 is not limited to caulking. For example, the urging spring 20 is fixed to the back plate 11 by a clip type that sandwiches the ear portion 11A in the disk axial direction. Also good. The front end side of the urging spring 20 abuts on the torque receiving surface 5 of the mounting member 2 in an elastically deformed state via the guide bottom plate 18C of the pad spring 14 (guide plate portion 18). Thereby, the urging spring 20 urges the friction pad 10 toward the unwinding side of the disk 1 to prevent the friction pad 10 from rattling in the circumferential direction of the disk 1 due to vibrations or the like when the vehicle travels. Is.

  The urging spring 20 is formed, for example, by bending (press forming) a stainless steel plate having elasticity as shown in FIG. The biasing spring 20 includes a mounting portion 20A, a first extending portion 20B, a bent portion 20C, and a second extending portion 20D. The attaching portion 20A of the urging spring 20 is located on the proximal end side of the urging spring 20 and attached to the ear portion 11A side of the back plate 11 via a caulking portion 11C or the like. That is, the mounting portion 20A is fixed to the ear portion 11A side of the back plate 11 on the side of the disk 1 through the caulking portion 11C, and is attached in a state of wide surface contact with the surface side of the ear portion 11A. .

  The first extending portion 20B has a notch groove toward the other surface (back surface) side opposite to one surface (front surface side) of the back plate 11 with the base end side connected (integrally formed) to the mounting portion 20A. 13 (see FIG. 6) is extended in a direction away from the disk 1. That is, the first extending portion 20B is bent in an L shape so as to be folded into the notch groove 13 of the back plate 11 from the front end side of the mounting portion 20A, and then moved to the back side of the ear portion 11A. It bends in a letter shape and extends obliquely in the disc axial direction and the circumferential direction.

  The bending portion 20C of the urging spring 20 is formed integrally with the front end side of the first extending portion 20B, and is arcuate (for example, U-shaped or C-shaped toward the disk 1 on the back side of the back plate 11). It is bent in the shape of a letter. The bent portion 20C is formed by being bent so as to be folded in an arc shape at a position on the inner side in the circumferential direction of the disk with respect to the end surface of the ear 11A of the back plate 11 facing the torque receiving surface 5 of the mounting member 2. ing.

  The second extending portion 20D extends from the front end side of the bent portion 20C to the front surface side of the back plate 11 in a direction approaching the disk 1, and the guide plate portion 18 of the pad spring 14 on the torque receiving surface 5 of the mounting member 2. (That is, abuts in an elastically deformed state via the guide bottom plate 18C). That is, the second extending portion 20D is inclined obliquely toward the surface side of the ear portion 11A so as to approach the disc 1 so as to straddle the cutout groove 13 of the back plate 11 from the outer side from the front end side of the bent portion 20C. It extends to.

  Further, as shown in FIG. 6, the biasing spring 20 is disposed at a position closer to the outer side in the radial direction than the center position in the width direction (disk radial direction) of the ear portion 11 </ b> A. As a result, the biasing spring 20 can bias the friction pad 10 toward the disk delivery side at a position that is closer to the outer side in the radial direction than the center position in the width direction of the ear portion 11A. It can be suppressed.

  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 brake fluid pressure is supplied to the inner leg portion 6A (cylinder) of the caliper 6 to cause the piston to slide and displace toward the disc 1, whereby the inner friction pad 10 is moved. Press against one side of the disc 1. At this time, since the caliper 6 receives a pressing reaction force from the disk 1, the entire caliper 6 is slid and displaced toward the inner side with respect to the arm portion 2A of the mounting member 2, and the outer leg portion 6C is a friction pad on the outer side. 10 is pressed against the other side of the disk 1.

  As a result, the inner and outer friction pads 10 firmly hold the disk 1 rotating in the direction indicated by the arrow A in FIG. 1 and FIG. 2 (when the vehicle moves forward) from both sides in the axial direction. The disc 1 can be given a braking force. When the brake operation is released, the hydraulic pressure supply to the piston is stopped, so that the inner and outer friction pads 10 are separated from the disk 1 and return to the non-braking state again.

  Further, at the time of such brake operation or release (during non-braking), the ear portion 11A located on the turning-in side of the disk 1 out of the ear portions 11A and 11B of the friction pad 10 is illustrated by the biasing spring 20. 2 is urged in the direction indicated by arrow B in FIG. 2, and the friction pad 10 is always urged by a weak force toward the delivery side of disk 1 (direction indicated by arrow A in FIG. 2). And the ear | edge part 11B located in the delivery side of the disc 1 is elastically pressed against the torque receiving surface 5 of the pad guide 4 through the guide plate part 18 of the pad spring 14 by the biasing force at this time.

  For this reason, the biasing spring 20 provided between the ear portion 11A on the disk insertion side and the torque receiving surface 5 prevents the friction pad 10 from rattling in the circumferential direction of the disk 1 due to vibration or the like when the vehicle travels. It can be regulated by. During braking operation when the vehicle moves forward, the braking torque (rotation torque in the direction of arrow A) received by the friction pad 10 from the disk 1 is received by the arm portion 2A (torque receiving surface 5 of the pad guide 4) on the delivery side. I can accept it.

  As a result, the ear 11 </ b> B located on the disk delivery side of the friction pad 10 continues to contact the torque receiving surface 5 of the pad guide 4 via the guide plate 18. Moreover, the ear 11B on the delivery side comes into contact with the guide plate 18 by the action of the urging spring 20 before the brake operation and has no clearance, so that the friction pad 10 is moved by the braking torque. There will be no noise.

  Further, the ear portions 11A and 11B of the friction pad 10 are slidably inserted into the pad guides 4 and 4 positioned on the turn-in side and the turn-out side of the disc 1 through the guide plate portion 18 of the pad spring 14. Then, each radial urging portion 19 is urged outward in the radial direction of the disk 1. Thereby, the ear | edge parts 11A and 11B of the friction pad 10 can be elastically pressed to the upper surface board 18A (surface in the radial direction of the disk 1) side of the guide plate part 18.

  For this reason, it is possible to restrict the friction pad 10 from rattling in the radial direction of the disk 1 due to vibration or the like during traveling by the radial biasing portion 19 of the pad spring 14. When the brake is operated, the inner and outer friction pads 10 are held in the guide plate portion 18 while the ear portions 11A and 11B of the friction pad 10 are kept in sliding contact with the upper surface plate 18A side of the guide plate portion 18. Can be smoothly guided in the disk axial direction.

  By the way, when the disc brake is assembled, the biasing spring 20 is attached to the ear portion 11A of the friction pad 10, and the ear portion 11A of the friction pad 10 is attached to the pad guide 4 of the arm portion 2A of the attachment member 2. If it tries to assemble via 14, the urging | biasing spring 20 which is a rotation direction biasing member of the friction pad 10 may become obstructive, and workability | operativity at the time of an assembly | attachment may worsen.

  Therefore, in the present embodiment, the protrusion 19D is provided on the radial biasing portion 19 of the pad spring 14. That is, the radial urging portion 19 of the pad spring 14 includes a first extending portion 19A that extends from the lower surface plate 18B of the guide plate portion 18 to the outer side in the axial direction of the disk 1, and a distal end side of the first extending portion 19A. A curled portion 19B that is folded back, a second extending portion 19C that extends in a direction approaching the disk 1 from the curled portion 19B, and contacts the ear portions 11A and 11B of the friction pad 10, and the second extending portion 19C To the center of the friction pad 10 in the circumferential direction of the disk 1.

  In this case, the protruding portion 19D of the radial urging portion 19 is disposed at a position near the flat surface portion 19B2 of the curled portion 19B in the second extending portion 19C, and the insertion guide portion 18E of the guide plate portion 18 is As shown in FIG. 5, they are arranged at positions substantially opposite in the upper and lower directions. The protrusion 19D of the radial urging portion 19 is an axially extending portion when the ear portions 11A and 11B of the friction pad 10 are inserted between the upper surface plate 18A and the lower surface plate 18B of the guide plate portion 18. Together with 18D and the insertion guide portion 18E, the ear portions 11A and 11B are smoothly guided to the inside of the guide plate portion 18.

  Accordingly, for example, as shown in FIG. 6, when the ear portions 11A and 11B of the inner friction pad 10 are assembled to the pad guides 4 of the mounting member 2 via the pad springs 14, the ear portions 11A of the friction pad 10 are previously provided. In the state where the biasing spring 20 attached to the side is elastically deformed so that it can be inserted into the guide plate portion 18 of the pad spring 14, the ear portion 11A is inserted along the flat surface portion 19B2 of the radial biasing portion 19. It pushes in the arrow D direction in FIG. 5 to the lower side of the part 18E.

  As described above, when the ear portion 11A of the friction pad 10 is inserted between the upper surface plate 18A and the lower surface plate 18B of the guide plate portion 18, the projection portion 19D of the radial biasing portion 19 is formed on the lower surface of the ear portion 11A. 6 is guided obliquely upward in the direction of arrow E in FIG. 6, and the second extending portion 19C of the radial urging portion 19 is elastic in the direction of arrow C to the lower position indicated by the two-dot chain line in FIG. Make the deformation smooth. Further, when the ear portion 11B of the friction pad 10 is inserted between the upper surface plate 18A and the lower surface plate 18B of the guide plate portion 18, the lower surface side of the ear portion 11B is caused by the protruding portion 19D of the radial biasing portion 19. By being guided obliquely upward, the second extending portion 19C of the radial biasing portion 19 is smoothly elastically deformed obliquely downward (that is, in the direction indicated by the arrow C in the direction indicated by the two-dot chain line in FIG. 5). Can be made.

  As a result, the projections 19 </ b> D of the radial biasing portion 19, the axially extending portions 18 </ b> D of the guide plate portion 18, and the insertion guide portion 18 </ b> E move the ear portions 11 </ b> A and 11 </ b> B of the friction pad 10 to the inside of the guide plate portion 18. Even when the biasing spring 20 is attached to the ear portion 11A side of the friction pad 10, the ear portion of the friction pad 10 is interposed between the upper surface plate 18A and the lower surface plate 18B of the guide plate portion 18. 11A and 11B can be stably inserted.

  Thereby, the back plate 11 and the lining 12 of the friction pad 10 on the inner side are assembled by being inserted to the position indicated by the two-dot chain line in FIG. Further, the outer friction pad 10 can be assembled in the same manner as the inner friction pad 10 described above, and an ear portion of the friction pad 10 is provided between the upper surface plate 18A and the lower surface plate 18B of the guide plate portion 18. 11A and 11B can be stably inserted.

  Therefore, according to this embodiment, workability when the friction pad 10 is assembled in each pad guide 4 of the mounting member 2 can be improved, and incomplete assembly due to the biasing spring 20 occurs. Can be prevented. Further, the curled portion 19B of the radial biasing portion 19 of the pad spring 14 is formed with a flat surface portion 19B2 as shown in FIG. 5, so that the ear portion 11A of the friction pad 10 is formed along the flat surface portion 19B2. , 11B can be smoothly inserted into the lower side of the insertion guide portion 18E, and workability during assembly can be improved.

  In the above-described embodiment, the case where the torque receiving surface 5 serving as the torque receiving portion is configured by the back side wall surface of the pad guide 4 including the U-shaped concave groove has been described as an example. However, the present invention is not limited to this. For example, the present invention can also be applied to a disc brake of a type in which a torque receiving surface as a torque receiver is provided at a position separated from the pad guide (a position different from the pad guide). is there.

  Next, the invention included in the above embodiment will be described. The rotation direction urging member is fixedly provided on the back plate of the friction pad. As a result, the rotation direction biasing member can be attached to the attachment member in a sub-assembly state in which the rotation direction biasing member is pre-assembled to the friction pad, and workability during assembly can be improved.

  Further, the rotational direction biasing member is configured to be fixedly provided on one side of the friction pad back plate provided with the lining. Thereby, it becomes easy to secure a spring constant and a necessary load (spring force) necessary for the rotation direction biasing member, and a limited vehicle space can be effectively utilized.

  On the other hand, the rotation direction urging member includes an attachment portion fixedly attached to one side of the back plate, and the other end which is connected to the attachment portion on the base end side and opposite to the one side of the back plate. A first extending portion extending in a direction away from the disk toward the surface, and a direction of approaching the disk on the other surface side of the back plate formed on the front end side of the first extending portion. And a second extending portion that extends in a direction approaching the disk from the front end side of the bent portion and elastically deforms to the mounting member side in a state of elastic deformation. .

  As a result, the spring length of the rotation direction biasing member can be sufficiently secured by the first extending portion, the bent portion, and the second extension portion, and the spring constant necessary for the rotation direction biasing member can be easily secured. In addition, the required load (spring force) can be secured easily, and the limited vehicle space can be used effectively.

  Further, the bent portion of the rotation direction urging member is configured to be bent in an arc shape at a position on the inner side in the disk circumferential direction from the end face of the torque transmission portion of the back plate facing the torque receiving surface of the mounting member. . Thereby, the spring length of the rotation direction biasing member can be formed to a sufficient length, the biasing force (spring force) can be stabilized, and the limited vehicle space can be effectively utilized. it can.

DESCRIPTION OF SYMBOLS 1 Disc 2 Mounting member 2A Arm part 3 Disc pass part 4 Pad guide 5 Torque receiving surface 6 Caliper 7 Sliding pin 10 Friction pad 11 Back plate 11A, 11B Ear part 12 Lining 14 Pad spring 15 Connecting plate part 18 Guide plate part 19 Radial direction urging part 19A 1st extension part 19B Curl part 19C 2nd extension part 19D Protrusion part 20 Energizing spring (rotation direction energizing member)

Claims (1)

A mounting member provided with a pad guide that is mounted on a non-rotating portion of the vehicle across the outer periphery of the disk in the axial direction and that guides in the axial direction of the disk in a state in which a pair of friction pads are fitted to the concave and convex portions, and the mounting member A caliper that is slidably provided, a pad spring that is attached to the attachment member and elastically supports the friction pads, and is provided on each friction pad in contact with the pad spring in the rotational direction of the disk. A rotation direction biasing member that biases each friction pad;
The pad spring is fitted and attached to a pad guide of the mounting member and guides the friction pad in the axial direction of the disk. The pad spring extends from the guide plate and is provided on the disk. A radial urging portion that urges radially,
The radial urging portion includes a first extending portion that extends from the guide plate portion in the axial direction of the disc, a curled portion that is folded back at a tip end side of the first extending portion, and the disc from the curled portion. A second extending portion that extends in a direction approaching the friction pad and contacts the friction pad, and a protrusion that protrudes from the second extending portion toward the center of the friction pad in the circumferential direction of the disk. Disc brake characterized by that.

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