JP6473020B2 - Vehicle disc brake - Google Patents

Description

  The present invention relates to a vehicle disc brake, and more particularly to a pin slide type vehicle disc brake in which a caliper body is slidably attached to a caliper bracket via a pair of slide pins.

  Conventionally, as a pin slide type vehicle disc brake, a pin mounting arm is provided on both sides of the working portion of the caliper body, a slide pin protrudes from the pin mounting arm, and a slide shaft portion of the slide pin is used as a caliper bracket. In some cases, the bag-like pin insertion portion is slidably accommodated, and the caliper body is attached to the caliper bracket so as to be movable in the disk axial direction.

  In this pin slide type disc brake, the caliper body easily tilts due to the clearance between the slide pin and the pin insertion portion, and as the caliper body tilts, the disc insertion side of the friction pad on the action side becomes the disc delivery side. When approaching the disk rotor, a negative pressure is generated between the disk rotor and the friction pad, and the friction pad may be attracted to the disk rotor to cause dragging. For this reason, the caliper body and the friction pad are provided with an anisotropic resistance applying device that suppresses the disk entry side of the friction pad from approaching the disk rotor more than the disk delivery side during braking, and the friction pad is dragged. Some have been reduced (for example, see Patent Document 1).

JP 2008-89012 A

  However, in the thing of the above-mentioned patent document 1, the structure of the anisotropic resistance force provision apparatus was complicated, and cost increased. Therefore, an object of the present invention is to provide a vehicle disc brake that can suppress dragging of a friction pad while suppressing cost.

In order to achieve the above object, a disk brake for a vehicle according to the present invention is disposed on one side of the disk rotor, and is disposed on the other side of the disk rotor, with an action portion having a cylinder hole for accommodating a piston, A caliper body is formed by connecting a reaction portion provided with a reaction force claw with a bridge portion to form a caliper body, and the caliper body is fixed to the vehicle body at one side portion of the disk rotor, a pair of slide pins and the slide In a vehicle disc brake that is slidably mounted in a disc axial direction via a pair of pin insertion portions into which pins are movably inserted in the axial direction, the caliper body has a contact surface with the slide pin, from run-out side to the disk rotation entrance side, gradually, it is formed at the inclined surfaces approaching the disc rotor, di when the vehicle travels forward Outlet side click times is characterized in that it is mounted inclined to approach the disc rotor than the disk rotation entrance side.

Further, the vehicle disc brake of the present invention is disposed on one side of the disc rotor and has a working portion having a cylinder hole for accommodating the piston, and is disposed on the other side of the disc rotor and includes a reaction force claw. The caliper body is formed by connecting the reaction part to the caliper body, and the caliper body is fixed to the vehicle body at one side of the disc rotor. In the vehicle disc brake attached so as to be slidable in the disc axis direction through a pair of pin insertion portions movably inserted into the slide shaft, the slide pin is inserted into the pin insertion portion, and the slide shaft portion, A head mounted on the caliper body, and the head has a seating surface in contact with the caliper body from the disk insertion side to the disk extraction side. Towards progressively, the formed by the inclined surface approaches the disc rotor, said caliper body, characterized in that the exit side disk rotation when the vehicle advancing, is also from the disk rotation entrance side attached inclined so as to approach to the disc rotor It is said.

Further, the vehicle disk brake of the present invention is disposed on one side of the disk rotor, and has a working portion having a cylinder hole for accommodating the piston, and is disposed on the other side of the disk rotor, and includes a reaction force claw. The caliper body is formed by connecting the reaction part to the caliper body, and the caliper body is fixed to the vehicle body at one side of the disc rotor. In the vehicular disc brake that is slidably attached in the disc axial direction via a pair of pin insertion portions that are movably inserted into the disc, the pair of slide pins are attached in parallel, and the caliper body is the caliper body. When the bracket is attached, the disc outlet side when the vehicle moves forward is more discreet than the disc inlet side. It is characterized by being formed inclined so as to approach the motor.

  According to the vehicle disc brake of the present invention, the caliper body is attached to the caliper bracket so that the disc extending side of the caliper body is closer to the disc rotor than the disc introducing side, so that the caliper body can be operated even when tilted during braking. Since the clearance between the disk insertion side of the friction pad on the part side and the disk rotor can be maintained, generation of negative pressure can be suppressed and drag can be reduced.

  Further, the contact surface of the caliper body with the slide pin is formed as an inclined surface gradually approaching the disc rotor from the disc delivery side to the disc entry side, or it contacts the caliper body at the head of the slide pin. By forming the contacting seating surface with an inclined surface that gradually approaches the disk rotor from the disk entry side to the disk delivery side, the posture to attach to the caliper bracket can be adjusted with simple processing, and costs are increased. Therefore, drag of the friction pad can be reduced.

  In addition, the caliper body is formed by tilting the disk delivery side when the caliper bracket is mounted so that the disk delivery side is closer to the disk rotor than the disk introduction side, so that the caliper body can be tilted during braking. Since the clearance between the disk entry side of the friction pad on the working part side and the disk rotor can be maintained, the generation of negative pressure can be suppressed, and drag can be reduced.

It is II sectional drawing of FIG. 1 is a front view of a vehicle disc brake showing a first embodiment of the present invention. It is a cross-sectional top view of the vehicle disc brake which shows the 2nd form example of this invention. It is a section top view of the disc brake for vehicles which shows the 3rd example of the present invention.

  FIG. 1 and FIG. 2 are views showing a first embodiment of the vehicle disc brake of the present invention. An arrow A indicates the rotation direction of the disc rotor that rotates integrally with the wheel when the vehicle moves forward. The exit side and the disk entry side are those when the vehicle is moving forward.

  The vehicle disc brake 1 according to the present embodiment includes a pair of caliper support arms 3a and 3a extending in the disc axial direction on the outer periphery of the disc rotor 2 on a caliper bracket 3 fixed to the vehicle body on one side of the disc rotor 2. The caliper body 5 is supported by the caliper support arms 3a and 3a through a pair of slide pins 4 and 4 so as to be movable in the disk axial direction. Each slide pin 4 is protruded by a mounting bolt 6 on each of pin mounting arms 5b and 5b protruding to both sides of the action portion 5a of the caliper body 5, and the slide pin 4 can be slid on each caliper support arm 3a. A bag-like pin insertion portion 3b to be accommodated in each is formed. The exposed portions of the slide pins 4 are covered with pin boots 7, respectively.

  The caliper bracket 3 is fixed by screwing a fixing bolt inserted into the vehicle body attachment portions 3c and 3c on one side of the disc rotor 2 to the vehicle body (both not shown). The pair of caliper support arms 3a, 3a projecting in the direction of the action portion 5a while sandwiching the disc rotor turn-in side and the turn-out side of the bridge portion 5c of the caliper body 5 across the outside of the disc rotor 2 is provided. It is extended. The pin insertion portion 3b formed in each caliper support arm 3a is opened to the action portion side, and a boot mounting groove 3d for fitting one end portion of the pin boot 7 is provided in the opening portion. Further, pad guide grooves 3e, 3e are provided on the opposing surfaces of the caliper support arms 3a, 3a, and torque receiving surfaces 3f for receiving torque from the friction pads 11 during braking are formed in the pad guide grooves 3e, respectively. ing.

  The caliper body 5 includes an action portion 5a and a reaction portion 5d that are arranged to face both sides of the disc rotor 2, and a bridge portion 5c that connects the caliper support arms 3a and 3a across the outer periphery of the disc rotor 2. It has become. The action portion 5a includes the above-described pin mounting arms 5b and 5b, a cylinder hole 9 in which the piston 8 is accommodated via the piston seal 8a, and a hydraulic chamber 10 defined at the bottom of the cylinder hole 9. Bolt holes 5e through which the mounting bolts 6 are inserted are respectively formed in the tip end side of each pin mounting arm 5b so as to penetrate in the disk axial direction. Further, the reaction portion 5d is provided with a reaction force claw 5f, and a pair of friction pads 11 and 11 are disposed opposite to each other with the disc rotor 2 interposed between the piston 8 and the reaction force claw 5f. Each pin mounting arm 5b has an anti-disc rotor side surface 5g formed in parallel with the side surface of the disc rotor 2, and the disc rotor side surface 5h (abutment surface with the slide pin of the present invention) extends from the disc delivery side to the disc delivery side. Toward, it is formed with an inclined surface that gradually approaches the disk rotor.

  The friction pad 11 includes a lining 11a that is in sliding contact with the side surface of the disk rotor 2, and a metal back plate 11b. Ear pieces 11c and 11c protrude from both sides of the back plate 11b, and each friction pad 11 is inserted into pad guide grooves 3e and 3e formed on the caliper support arms 3a and 3a. However, it is suspended so as to be slidable in the disk axial direction.

  Each slide pin 4 includes a sliding shaft portion 4a on the tip side that slides in the pin insertion portion 3b, and a head portion 4b that has a larger diameter than the sliding shaft portion 4a. The head 4b is formed with a female screw hole 4c that opens to the base end surface on the central axis, and a boot fitting groove 4d for fitting the other end of the pin boot 7 is provided around the outer circumference of the head 4b. ing. These slide pins are inserted into the bolt holes 5e formed in the pin mounting arms 5b of the caliper body 5 from the working portion side, screwed into the female screw holes 4c of the slide pins 4, and the slide pins 4 are pinned. The caliper body is attached to the caliper bracket 3 by being inserted into the pin insertion portions 3b formed on the caliper support arm 3a of the caliper bracket 3 by attaching the slide shaft portions 4a of the slide pins 4 to the attachment arms 5b. It is done.

  The caliper body 5 is formed so as to be tilted so that the disk delivery side is closer to the disk rotor 2 than the disk delivery side when assembled to the caliper bracket 3. The cylinder hole 9 and the bolt hole 5e are formed so that each axis is parallel to the disk axis CL1 in a state where the caliper body 5 is attached to the caliper bracket 3.

  In the vehicular disc brake 1 formed as described above, when the hydraulic pressure generated in a well-known hydraulic master cylinder (not shown) is supplied to the hydraulic chamber 10, the piston 8 moves the cylinder hole 9 toward the disc rotor. It advances and presses the friction pad 11 of the action part side to one side of the disk rotor 2. Next, by this reaction, the caliper body 5 is moved in the direction of the action part 5a while being guided by the slide pins 4 and 4, and the reaction force claw 5f of the reaction part 5d causes the friction pad 11 on the reaction part side to move to the disc. A braking action is performed by pressing against the other side of the rotor 2.

  Each friction pad 11 at the time of braking is dragged in the disc delivery direction by the sliding contact between the disc rotor 2 and the lining 11a, and the side end surface on the disc delivery side of the ear piece 11c on the disc delivery side is connected to the torque receiving surface 3f. Abut. Due to the braking torque generated at this time, a bending moment is generated in the caliper body 5 so as to cause the disk feed-in side to move toward the reaction part and the disk feed-out side toward the action part. Since the disk delivery side is mounted so as to be closer to the disk rotor 2 than the disk delivery side, the entire surface of the friction pad 11 on the working part side is pressed against the disk rotor 2 with a substantially uniform force. Can do.

  When the braking is released, the piston 8 moves backward toward the bottom of the cylinder hole 9 by the restoring force of the piston seal 8a, and the caliper body 5 and the friction pad 11 return to the initial positions. At this time, since the entire surface of the friction pad 11 is pressed against the disk rotor 2 with a substantially uniform force, the friction pad 11 can return to the initial position without being inclined with respect to the disk rotor 2. A uniform gap with the lining 11a can be maintained. As a result, it is possible to prevent the lining 11a of the friction pad 11 from sticking to the disk rotor 2 due to the negative pressure generated when the gap between the disk rotor 2 and the lining 11a is not uniform as in the prior art. The occurrence of drag and judder can be suppressed.

  3 and 4 show other embodiments of the present invention. Components that are the same as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. .

  FIG. 3 shows a second embodiment of the present invention. Each slide pin 12 of the present embodiment includes a sliding shaft portion 12a on the distal end side that slides in the pin insertion portion 3b, and the sliding shaft portion. A head 12b having a diameter larger than 12a, and the head 12b has a seating surface 12c that abuts on the disk rotor side surface 5j of the pin mounting arm 5i of the caliper body 5 from the disk insertion side. In the state where the caliper body 5 is assembled to the caliper bracket 3, the disc feeding side is closer to the disc rotor 2 than the disc feeding side. It is tilted so that it approaches.

  FIG. 4 shows a third embodiment of this embodiment, and the disk rotor side surface 5k of each pin mounting arm 5i and the seating surface 13a of the slide pin 13 of this embodiment are parallel to the side surface of the disk brake 2. The caliper body 5 that is formed and assembled to the caliper bracket 3 is formed so as to be inclined so that the disc delivery side is closer to the disc rotor 2 than the disc delivery side.

  The present invention is not limited to the above-described embodiments, and the position and shape of the friction pad ear piece and the torque receiving portion of the caliper bracket are arbitrary, and the type in which the friction pad is suspended by a hanger pin. It can also be applied to things. Further, the shape of the caliper body is not limited to this embodiment, and the number of pistons and reaction force claws is arbitrary.

DESCRIPTION OF SYMBOLS 1 ... Vehicle disc brake, 2 ... Disc rotor, 3 ... Caliper bracket, 3a ... Caliper support arm, 3b ... Pin insertion part, 3c ... Car body mounting part, 3d ... Boot mounting groove, 3e ... Pad guide groove, 3f ... Torque Bearing surface, 4 ... slide pin, 4a ... sliding shaft, 4b ... head, 4c ... female screw hole, 4d ... boot fitting groove, 5 ... caliper body, 5a ... action part, 5b ... pin mounting arm, 5c ... Bridge arm, 5d ... reaction part, 5e ... bolt hole, 5f ... reaction force claw, 5g ... anti-disc rotor side, 5h ... disc rotor side, 5i ... pin mounting arm, 5j ... disc rotor side, 5k ... disc rotor side, 6 ... mounting bolt, 7 ... pin boot, 8 ... piston, 8a ... piston seal, 9 ... cylinder hole, 10 ... hydraulic chamber, 11 ... friction pad, 11a ... lining, 11b ... back plate, 1 c ... ears, 12 ... slide pin, 12a ... sliding shaft portion, 12b ... head, 12c ... seat surface, 13 ... slide pin, 13a ... seat surface

Claims (3)

A bridge part connects an action part that is arranged on one side of the disk rotor and has a cylinder hole that accommodates a piston, and a reaction part that is arranged on the other side of the disk rotor and has a reaction force claw. A pair of slide pins and a pair of pins inserted into the caliper bracket, which forms a caliper body and the caliper body is fixed to the vehicle body at one side of the disc rotor, are movably inserted in the axial direction. In the vehicle disc brake attached so as to be slidable in the disc axial direction through the section,
The caliper body has a contact surface with the slide pin formed by an inclined surface gradually approaching the disc rotor from the disc delivery side to the disc entry side, and the disc delivery side when the vehicle advances is the disc A disc brake for a vehicle, wherein the disc brake is mounted so as to be closer to the disc rotor than the turn-in side. A bridge part connects an action part that is arranged on one side of the disk rotor and has a cylinder hole that accommodates a piston, and a reaction part that is arranged on the other side of the disk rotor and has a reaction force claw. A pair of slide pins and a pair of pins inserted into the caliper bracket, which forms a caliper body and the caliper body is fixed to the vehicle body at one side of the disc rotor, are movably inserted in the axial direction. In the vehicle disc brake attached so as to be slidable in the disc axial direction through the section,
The slide pin includes a sliding shaft portion that is inserted into the pin insertion portion, and a head portion that is attached to the caliper body. From the disk delivery side, gradually formed with an inclined surface approaching the disk rotor,
The disc brake for a vehicle according to claim 1, wherein the caliper body is attached so as to be inclined so that a disc delivery side when the vehicle moves forward is closer to the disc rotor than a disc introduction side. A bridge part connects an action part that is arranged on one side of the disk rotor and has a cylinder hole that accommodates a piston, and a reaction part that is arranged on the other side of the disk rotor and has a reaction force claw. A pair of slide pins and a pair of pins inserted into the caliper bracket, which forms a caliper body and the caliper body is fixed to the vehicle body at one side of the disc rotor, are movably inserted in the axial direction. In the vehicle disc brake attached so as to be slidable in the disc axial direction through the section,
The pair of slide pins are respectively attached in parallel,
The disc brake for a vehicle according to claim 1, wherein when the caliper bracket is attached, the caliper body is formed so as to be inclined such that a disc delivery side when the vehicle advances is closer to the disc rotor than a disc introduction side.

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