JP6654476B2 - Disc brakes for vehicles - Google Patents

Description

  The present invention relates to a vehicle disk brake used for a running vehicle such as an automobile or a motorcycle, and more particularly to a vehicle disk brake of a type in which a friction pad is suspended using a hanger pin.

  In a vehicle disk brake of the type in which a pair of friction pads are hung on a caliper body using a hanger pin, a plate-shaped pad spring is contracted outside the friction pad in the radial direction of the disk, and the friction pad is padded. A spring urges the disc inward to prevent the friction pad from rattling due to running vibration and from floating outward in the disc radial direction during braking (for example, see Patent Document 1).

JP 2008-202661 A

  However, in the disc brake as disclosed in Patent Document 1, at the time of assembling, a pair of friction pads and a pad spring are arranged at predetermined positions on the caliper body, and the pad spring is bent toward the friction pad while being attached to the caliper body. Since the hanger pin must be inserted through the formed hanger pin insertion hole and the hanger pin insertion hole formed in the friction pad, the assembling operation is troublesome.

  Therefore, an object of the present invention is to provide a disk brake for a vehicle that does not require much time for assembling work.

  In order to achieve the above object, the vehicle disc brake of the present invention is provided in a bridge portion of a caliper body disposed over the outside of the disc rotor, and a ceiling opening for inserting and removing a friction pad is provided penetrating in and out. A plurality of hanger pins penetrating the caliper body through the ceiling opening in the disk axis direction are inserted into pad suspension pieces of the friction pad, and a pair of friction pads are arranged on both sides of the disk rotor to face each other. A disc spring for a vehicle including a pad spring that elastically contacts the pair of friction pads on a radially outer surface of the disc in the disc radial direction and urges the pair of friction pads inwardly of the disc rotor; A first pad spring member that urges the friction pad toward the disk outlet side when the vehicle advances, and a pair of the pair of the first and second pad spring members; A second pad spring member that urges the friction pad into the disk rotor when the vehicle enters the disk when the vehicle moves forward, wherein the first pad spring member resiliently moves toward the disk discharge side of the pair of friction pads. A second spring pad having a first elastic contact piece in contact with the first elastic piece and a first spring piece extending from the first elastic contact piece and having a first engagement portion that is engaged with the hanger pin on the disk reciprocating side; The spring member includes a second elastic contact piece elastically contacting the disk reciprocating side of the pair of friction pads, and a second engaging member extending from the second elastic contact piece and engaged with the hanger pin on the disk reciprocating side. A second spring piece having a stop portion, wherein the first pad spring member and the second pad spring member are assembled without overlapping each other.

  Further, one of the first spring piece and the second spring piece extends in the assembled state to a central portion in the disk axial direction of the ceiling opening, and the first spring piece and the second spring piece It is preferable that one of the other spring pieces is composed of a pair of spring pieces that extend across the one of the spring pieces in an assembled state.

  Further, the width dimension of one of the first spring piece and the second spring piece and the width dimension of the other pair of spring pieces of the first spring piece and the second spring piece are summed. It is preferred that the dimensions given are equal.

  According to the vehicle disc brake of the present invention, the first spring member and the second spring member can be assembled from the ceiling opening after the friction pad and the hanger pin are assembled to the caliper body. In addition, it is not necessary to insert the hanger pin between the caliper body and the friction pad while flexing the pad spring toward the friction pad, thereby improving the assembling property.

  In addition, one of the first spring piece and the second spring piece is extended in the disk axial direction central portion of the ceiling opening in the assembled state, and the other spring piece is replaced with one of the other spring pieces. The first spring member and the second spring member can be favorably arranged even in a narrow space by being configured with a pair of spring pieces extending across the spring piece. Further, by forming the width dimension of one of the spring pieces and the sum of the width dimensions of the other pair of spring pieces equal, the first spring piece can be secured while maintaining the same rigidity. The force can be satisfactorily dispersed between the first spring piece and the second spring piece.

It is II sectional drawing of FIG. 1 is a plan view of a vehicle disc brake showing one embodiment of the present invention. FIG. 2 is a front view of the vehicle disk brake. It is an exploded perspective view of a pad spring and a hanger pin which show one form example of the present invention.

  1 to 4 are views showing an embodiment of a vehicle disk brake according to the present invention, wherein an arrow A indicates a rotation direction of a disk rotor that rotates integrally with a wheel when the vehicle advances, and a disk outlet side described below. The disc entry side refers to the time when the vehicle is moving forward.

  The vehicle disk brake 1 according to the present embodiment includes a pair of operating portions 3a, 3a opposed to each other with a disk rotor 2 interposed therebetween, and a pair of bridge portions 3b, 3b provided on a disk inlet side and a disk outlet side. 3b and a caliper body 3 having a monocoque structure integrally formed.

  The action portions 3a, 3a are provided with three cylinder holes 3c each having an opening on the disk rotor 2 side so as to face each other. In each cylinder hole 3c, a piston 4 is housed in a liquid-tight manner via a piston seal, is formed in a 6-pot piston-facing type, and is provided between the bottom of each cylinder hole 3c and the bottom surface of each piston 4. Defines a hydraulic chamber to which the hydraulic fluid is supplied. The hydraulic chambers of the cylinder holes 3c, 3c arranged on the disk outlet side are connected by a liquid passage tube 5 arranged across the disk rotor 2, and the cylinder holes 3c arranged on the disk inlet side. , 3c are each formed with a blender hole, into which the blender screws 5a, 5a are screwed.

  A mounting bolt insertion hole in the radial direction of the disk is provided on the disk inlet side and the disk outlet side of one of the action portions 3a, and mounting bolts 6, 6 inserted through the mounting bolt insertion holes are provided on the vehicle body side. The caliper body 3 is attached to the vehicle body by screwing it to the bracket 7 that is present.

  On the opening side of the cylinder hole 3c, friction pads 8 each composed of a lining 8a and a back plate 8b are arranged to face each other so as to sandwich the disk rotor 2. The friction pad 8 is suspended by a pair of hanger pins 9, 9 laid across the outer circumference of the disk rotor 2 in the disk axial direction, and provided with torque receivers provided on the disk inlet side and the disk outlet side, respectively. It is movable in the disk axis direction between the surfaces 3d.

  On the outer peripheral side of the disc of the caliper body 3, a ceiling opening 3e surrounded by the working portions 3a, 3a and the bridge portions 3b, 3b is formed. The ceiling opening 3e serves as an opening for inserting the friction pad 8 between the torque receiving surfaces 3d, 3d via the retainer 10, and the friction pads 8, 8 can be inserted into both sides of the disk rotor 2. It is formed in a substantially rectangular size. A pad spring 11 is provided on the outer side of the friction pads 8 and 8 in the radial direction of the disk to elastically contact the outer surfaces of the friction pads 8 and 8 in the radial direction of the disk to urge the friction pads 8 and 8 inward of the disk rotor. Have been.

  The pad spring 11 urges the disc reciprocating side of the friction pads 8, 8 inwardly of the disc rotor, and urges the disc reciprocating side of the friction pads 8, 8 inwardly of the disc rotor. And a second pad spring member 13. The first pad spring member 12 is disposed to straddle the disk rotor 2 and elastically contacts the friction pads 8 and 8 on the disk reciprocating side on the disk radial side in the radial direction of the disk, and the first elastic contact piece 12a. And a first locking piece 12c that is locked to the hanger pin 9 on the disc outlet side at the tip of the first spring piece 12b. The second pad spring member 13 is disposed across the disk rotor 2 and elastically contacts a radially outer surface of the friction pads 8, 8 on the disk outlet side with respect to the disk radial direction, and a second elastic contact piece 13 a. And a pair of second spring pieces 13b, 13b extending from the second spring pieces 13b. At the tip of each of the second spring pieces 13b, a second locking portion 13c is formed, which is locked to the hanger pin 9 on the disk reciprocating side. Have been.

  The first spring piece 12b is located at the center of the ceiling opening 3e in the disk axial direction when assembled, and gradually extends outward from the first elastic contact piece 12a in the radial direction of the disk. 12d and the distal end of the base side spring portion 12d are bent inward in the radial direction of the disk, pass through the side of the disk rotor of the hanger pin 9 on the disk entrance side, and pass through the hanger pin 9 on the disk exit side. The first locking portion 12c is formed by bending the distal end portion of the distal side spring portion 12e outward while bending the distal end portion of the distal side spring portion 12e in the radial direction of the disk.

  When assembled, the second spring pieces 13b, 13b extend with the first spring piece 12b interposed therebetween, and gradually extend outward from the second elastic contact piece 13a in the radial direction of the disk, respectively. From the side spring portions 13d, 13d and the distal ends of the base side spring portions 13d, 13d, the disk is bent inward in the radial direction of the disk, passes through the side of the disk rotor of the hanger pin 9 on the disk outlet side, and rotates the disk. Tip end spring portions 13e, 13e extending toward the entrance side hanger pin 9, and bending the tip end of each tip side spring portion 13e outward in the disk radial direction to return to the second locking portion. 13c are respectively formed. Further, the width of the second spring piece 13b is formed to be half the width of the first spring piece 12b, and the width of the first spring piece 12b and the width of the second spring piece 13b, 13b. It is equal to the sum of the width dimensions.

  According to the vehicle disc brake 1 formed as described above, after the friction pads 8, 8 and the hanger pins 9 are assembled to the caliper body 3, the first pad spring member is inserted from the disc reciprocating side of the ceiling opening 3e. 12, the first spring piece 12b is inserted, and the distal end side spring portion 12e is brought into contact with the disk rotor side surface of the hanger pin 9 on the disk entry side and the disk rotor side surface of the hanger pin 9 on the disk exit side. The stop portion 12c is engaged with the hanger pin 9 on the disc rewinding side, and the first elastic contact piece 12a is resiliently contacted with the friction pad 8, 8 on the disc radially outer side on the revolving side of the disc. Further, the second spring pieces 13b, 13b of the second pad spring member 13 are inserted from the disk outlet side of the ceiling opening 3e, and the tip side spring portions 13e, 13e are brought into contact with the disk rotor side surface of the hanger pin 9 on the disk outlet side. The second engaging portions 13c, 13c are respectively engaged with the hanger pins 9 on the disk reciprocating side by abutting the respective hanger pins 9 on the disk reciprocating side against the side surfaces of the disk rotor. The pads 8, 8 are elastically brought into contact with the radially outer surface of the disk on the disk feeding side. Also, in this assembled state, the first spring piece 12b is sandwiched between the second spring pieces 13b, 13b, and the first pad spring member 12 and the second pad spring member 13 do not overlap.

  As described above, in the present embodiment, after the friction pads 8, 8 and the hanger pins 9 are assembled to the caliper body 3, the first pad spring member 12 and the second pad spring member 13 are connected via the ceiling opening 3e. Can be easily assembled, so that the assemblability can be improved. Further, since the first pad spring member 12 and the second pad spring member 13 are assembled with the second spring pieces 13b, 13b sandwiching the first spring piece 12b, the first pad spring member 12 can be used even in a narrow space. And the second pad spring member 13 can be favorably arranged. Further, since the width of the second spring piece 13b is formed to be half the width of the first spring piece 12b, the width of the first spring piece 12b and the width of the second spring pieces 13b, 13b are formed. The sum of the dimensions becomes equal, and the force can be satisfactorily dispersed between the first spring piece 12b and the second spring piece 13b while maintaining the same rigidity.

  The present invention is not limited to the above-described embodiment, and the second spring piece is formed by one spring piece located at the center of the ceiling opening in the disk axial direction when assembled. May be locked by two spring pieces sandwiching the second spring piece. The shape and width of the first spring piece and the second spring piece are arbitrary, and are not limited to the above-described embodiment. Furthermore, the caliper body of the present invention is not limited to the monocoque six-pot piston-facing type, but may be a split-type caliper body, and the number of pistons is arbitrary.

DESCRIPTION OF SYMBOLS 1 ... Disc brake for vehicles, 2 ... Disc rotor, 3 ... Caliper body, 3a ... Working part, 3b ... Bridge part, 3c ... Cylinder hole, 3d ... Torque receiving surface, 3e ... Ceiling opening part, 4 ... Piston, 5 ... Liquid passage tube, 5a: Brewder screw, 6: Mounting bolt, 7: Bracket, 8: Friction pad, 8a: Lining, 8b: Back plate, 9: Hanger pin, 10: Retainer, 11: Pad spring, 12: No. 1 pad spring, 12a: first elastic contact piece, 12b: first spring piece, 12c: first locking portion, 12d: proximal spring portion, 12e: distal spring portion, 13: second pad spring member, 13a: second elastic contact piece, 13b: second spring piece, 13c: second locking portion, 13d: proximal end spring portion, 13e: distal end spring portion

Claims (3)

A ceiling opening for inserting and removing a friction pad is provided through the inside and outside of the bridge portion of the caliper body disposed over the outside of the disk rotor, and the ceiling opening is penetrated in the axial direction of the disk to bridge the caliper body. A plurality of hanger pins are inserted through the pad hanging pieces of the friction pad, and a pair of friction pads are disposed on both sides of the disk rotor so as to face each other, and elastically contact the disk radial outer surfaces of the pair of friction pads. A disc brake for a vehicle having a pad spring for urging the pair of friction pads inward of the disc rotor,
The pad spring includes a first pad spring member that urges the pair of friction pads toward the disk inflow side when the vehicle advances, and a pair of friction pads that injects the disk when the vehicle advances. A second pad spring member biasing inward of the disk rotor,
The first pad spring member is provided with a first elastic contact piece elastically contacting the pair of friction pads on the disk reciprocating side, and extending from the first elastic contact piece and locked by the hanger pin on the disk reciprocating side. A first spring piece having a first locking portion.
The second pad spring member is provided with a second elastic contact piece elastically contacting the pair of friction pads on the disk rewinding side, and extending from the second elastic contact piece and locked by the hanger pin on the disk retraction side. A second spring piece having a second locking portion.
A disc brake for a vehicle, wherein the first pad spring member and the second pad spring member are assembled without overlapping each other.   Either the first spring piece or the second spring piece extends in the disk axial center of the ceiling opening in the assembled state, and the first spring piece and the second spring piece are separated from each other. The disc brake for a vehicle according to claim 1, wherein one of the other spring pieces is configured by a pair of spring pieces extending across the one of the spring pieces in an assembled state.   The sum of the width of one of the first spring piece and the second spring piece and the width of the other one of the first spring piece and the second spring piece. 3. The vehicle disk brake according to claim 2, wherein:

Images