JP2012117658A - Disk brake device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk brake device that prevents the rattling sound of an outer pad supported by slide pins.SOLUTION: A floating-type disk brake device comprises a caliper 12, an outer pad 58 provided with a projection that engages with the recess of a claw part 18 of the caliper 12, and a pair of slide pins 24 (24a, 24b) that guide the caliper 12 in the axial direction of a rotor; the brake torque of the outer pad 58 is borne by the slide pins 24. A pressure plate 60 that constitutes the outer pad 58 is provided with a pair of through-holes through which the slide pins 24 pass. The center pitch of the pair of through-holes and the center pitch of the slide pins are set so as to be different. The through-holes have on the inner circumferential surface thereof a contact part that contacts the slide surface of the slide pins 24, and are provided with a gap-filling part, on the inner circumferential surface at a position on the side opposite the contact part, for making the gap between the inner circumferential surface and the sliding pins 24 smaller.

Description

  The present invention relates to a disc brake device, and more particularly to a floating type disc brake device for pin-sliding a brake pad.

  As a floating disc brake of a type in which a brake pad is slid into a pin, one disclosed in Patent Document 1 is known. 38 to 40 are explanatory diagrams of a floating type disc brake disclosed in Patent Document 1. FIG. 38 is a partial cross-sectional side view of a conventional disc brake device, FIG. 39 is a view showing the AA cross section in FIG. 38, and FIG. 40 is a view showing the BB cross section in FIG. As shown in the figure, the disc brake device 1 is configured to support a brake pad (inner pad 4, outer pad 5) by a combination of a support 2 and a slide pin 3. Specifically, the inner pad 4 is supported by the accommodating portion of the support 2. On the other hand, the outer pad 5 is provided with a through hole 5a through which the pair of slide pins 3 are inserted, and is supported in a state in which the slide pin 3 is inserted into the through hole 5a. For this reason, the outer pad 5 can slide in the axial direction of a rotor (not shown) on the tip side of the pair of slide pins 3.

  In the disc brake device 1 having such a basic configuration, the inner pad 4 and the outer pad 5 are both pressed toward the inner peripheral side in the rotor radial direction by pad springs 6 and 7 in contact with the caliper 8.

JP 54-137572 A

  In the disc brake device 1 of the type in which the brake pad (inner pad 4, outer pad 5) is supported by the slide pin 3, the inner peripheral surface of the through hole 5 a of the outer pad 5 and the slide pin 3 are realistic from the viewpoint of processing error. It is necessary to provide a certain gap between the outer peripheral surface. In such a case, in the outer pad 5 pressed against the slide pin 3 toward the inner side in the radial direction of the rotor, the slide pin 3 is shifted to the through-hole 5a, so that a gap generated on the opposite side is increased. For this reason, an increase in rattle noise due to vibration during vehicle travel has been a problem. On the other hand, when the spring load of the pad spring 7 is increased in order to prevent rattle noise, there arises a problem that the braking performance is hindered due to an increase in sliding resistance.

  Accordingly, an object of the present invention is to provide a disc brake device that can solve the above-mentioned problems without sacrificing brake performance and can suppress the rattle noise of the outer pad supported by the slide pin.

  A disc brake device according to the present invention includes a caliper, an outer pad having a convex portion that fits into a concave portion of a claw portion of the caliper, and a pair of slide pins that guide the caliper in the axial direction of the rotor. In the floating type disc brake device in which a braking torque is supported by the slide pin, the pressure plate constituting the outer pad includes a pair of through holes through which the slide pin is inserted, and a center pitch between the pair of through holes The center pitch between the pair of slide pins is set to be different, and the through hole has a contact portion with the sliding surface of the slide pin on the inner peripheral surface and is located on the opposite side of the contact portion. The inner peripheral surface is provided with a gap filling portion for reducing a gap between the inner peripheral surface and the slide pin.

Further, in the disc brake device having the above-described characteristics, the through hole is a superior arc portion configured by a superior arc obtained when the circle is divided by a string, and the gap filling portion is obtained by the string. It is preferable that the string part is constituted by a straight line.
By setting it as such a structure, the clearance gap between the slide pin and the through-hole which were put together can be narrowed effectively.

Further, in the disc brake device having the above-described characteristics, the chord portion can be a convex portion that is convex toward the center of curvature of the dominant arc portion.
According to such a configuration, in the straight chord portion, when the slide pin moves along the dominant arc portion, a portion where the gap becomes large is generated, but the portion can be effectively narrowed.

In the disc brake device having the above-described characteristics, the chord portion may be a curved convex portion that is convex toward the center of curvature of the dominant arc portion.
According to such a configuration, the gap can be effectively narrowed according to the curvature of the dominant arc portion.

Further, in the disc brake device having the above-described characteristics, the through hole may be a circular arc part in which the contact part is configured by a circular arc and a rectangular part in which the gap filling part is configured by a square.
According to such a configuration, in addition to the effect of suppressing rattle noise caused by rattling between the slide pin and the through hole, the remaining gap can be widened. Thereby, even if water accumulates between the slide pin and the through hole, the water can be easily removed, and rust generated in the corresponding portion can be suppressed.

In the disc brake device having the above-described characteristics, the center pitch between the pair of through holes is set larger than the center pitch between the pair of slide pins, and the through holes provided on the rotor entrance side The through hole provided on the rotor outlet side on the side surface of the slide pin located on the rotor radial side and outside the rotor pin is located on the rotor radial side outside the slide pin in the rotor radial direction. It is desirable that the outer pad is pushed down so that the inner peripheral surface is biased to the side surfaces.
With such a configuration, it is possible to disperse the braking torque applied to the slide pins during braking, and to suppress rattle noise that is generated when vibration is input.

In the disc brake device having the above-described features, the center pitch between the pair of through holes is set smaller than the center pitch between the pair of slide pins, and the through holes provided on the rotor entrance side The through hole provided on the rotor outlet side on the side surface located on the rotor radial inlet side of the slide pin in the rotor radial direction is located on the rotor radial side inner side of the slide pin in the rotor radial direction. It is also desirable that the outer pad is pushed up so that the inner peripheral surface is biased to the side surfaces.
Even in such a configuration, it is possible to disperse the braking torque applied to the slide pins during braking, and to suppress rattle noise that is generated when vibration is input.

  Furthermore, in the disc brake device having the above-described characteristics, the outer pad may be provided with a clip that urges the inner peripheral surface of the through hole on the sliding surface of the slide pin.

  According to the disc brake device having the above-described characteristics, it is possible to suppress the rattle noise of the outer pad supported by the slide pin without sacrificing the brake performance.

It is a figure showing the plane form of the disc brake device concerning a 1st embodiment. It is a figure showing the front form of the disc brake device concerning a 1st embodiment. It is a figure showing the right side form of the disc brake device concerning a 1st embodiment. It is a right lower surface side perspective view of the disc brake device concerning a 1st embodiment. It is a figure which shows the structure of the slide pin and engaging part in the disc brake apparatus which concerns on embodiment. It is a perspective view which shows the engagement state of an outer pad and a pad clip. Relation pitch P ₂ of the pitch P ₁ and the slide pin holes in the outer pad of the disc brake device according to the first embodiment, and is a diagram for explaining a state at the time of braking torque loads. It is a side perspective view which shows the structure of a pair of pad clip. It is the perspective view seen from the spring part side which shows a structure of a pair of pad clip. It is a figure which shows the pressing form of the outer pad with respect to the slide pin in the disc brake device which concerns on 1st Embodiment. Are diagrams for explaining a difference in a component force of the pad clip according to the arrangement relationship of the seat for locking the through-hole and the pad clip, and the first straight line l ₀ which passes through the center of the through hole and a second straight line l ₁ It is a figure which shows the example in case the angle (theta) of 45 is 45 degrees. Are diagrams for explaining a difference in a component force of the pad clip according to the arrangement relationship of the seat for locking the through-hole and the pad clip, and the first straight line l ₀ which passes through the center of the through hole and a second straight line l ₁ It is a figure which shows the example in case the angle (theta) of this is less than 45 degrees. Are diagrams for explaining a difference in a component force of the pad clip according to the arrangement relationship of the seat for locking the through-hole and the pad clip, and the first straight line l ₀ which passes through the center of the through hole and a second straight line l ₁ It is a figure which shows the example in case the angle (theta) of this is larger than 45 degrees. It is a figure for demonstrating the operation | movement relationship between the slide pin by the side of rotor rotation in the disc brake apparatus which concerns on 1st Embodiment, and the through-hole of an outer pad. It is a figure which shows the example in case the one part wall surface of a through-hole is missing. It is a figure which shows the example at the time of making the chord part of the through-hole comprised by a dominant arc part and a chord part into a convex-shaped part. It is a figure which shows the example at the time of making the chord part of the through-hole comprised by a dominant arc part and a chord part into a curved convex part. It is a figure which shows the example at the time of comprising a through-hole by the combination of a semicircle and a square. It is a right lower surface side perspective view of the disc brake device concerning a 2nd embodiment. It is a figure which shows the front form of the disc brake apparatus which concerns on 2nd Embodiment. It is a figure which shows the plane form of the pad clip which concerns on 2nd Embodiment. It is a figure which shows the front form of the pad clip which concerns on 2nd Embodiment. It is a figure which shows the right side surface form of the pad clip which concerns on 2nd Embodiment. It is a perspective view which shows the form of the pad clip arrange | positioned at the rotor entrance side. It is a perspective view which shows the form of the pad clip arrange | positioned at a rotor delivery side. It is an expansion | deployment top view of a pad clip. It is a figure which shows an example of the structure by which the couple which arises in an outer pad at the time of braking becomes a reverse direction to a rotor rotation direction. It is a figure which shows an example of the structure by which the couple which arises in an outer pad at the time of braking becomes the same direction as a rotor rotation direction. In 1st, 2nd embodiment, it is a figure which shows the pressing form of the outer pad with respect to a slide pin when the couple produced in an outer pad at the time of braking reverses. It is a right lower surface side perspective view of the disc brake device concerning a 3rd embodiment. It is a figure which shows the front form of the disc brake apparatus which concerns on 3rd Embodiment. Relation pitch P ₂ of the pitch P ₁ and the slide pin holes in the outer pad of the disc brake device according to the third embodiment, and is a diagram for explaining a state at the time of braking torque loads. It is a figure which shows the press form of the outer pad with respect to the slide pin in the disc brake device which concerns on 3rd Embodiment. It is a figure for demonstrating the operation | movement relationship between the slide pin by the side of the rotor at the disc brake apparatus which concerns on 3rd Embodiment, and the through-hole of an outer pad. It is a right lower surface side perspective view of the disc brake device concerning a 4th embodiment. It is a figure which shows the front form of the disc brake apparatus which concerns on 4th Embodiment. In 3rd, 4th embodiment, it is a figure which shows the pressing form of the outer pad with respect to a slide pin when the couple produced in an outer pad at the time of braking reverses. It is a partial cross section side view in the conventional disc brake device. It is a figure which shows the AA cross section in FIG. It is a figure which shows the BB cross section in FIG.

  Hereinafter, embodiments of the disc brake device according to the present invention will be described in detail with reference to the drawings. 1 is a plan view of the disc brake device according to the first embodiment, FIG. 2 is a front view, and FIG. 3 is a right side view. FIG. 4 is a perspective view from the lower right side.

  The disc brake device 10 according to the present embodiment includes a support 38, slide pins 24 (24a, 24b) that engage with the support 38, a caliper 12 that engages with the slide pin 24, and brake pads (inner pads 52, The outer pad 58) is basically used.

  The support 38 functions as a torque receiver that fixes the disc brake device 10 to the vehicle and receives the braking torque of a rotor (not shown) that rotates with the wheels. The support 38 includes a pair of torque receiving portions 40 (40a, 40b) provided to engage the slide pin 24, which will be described in detail later, and a support bridge portion 46 that connects the pair of torque receiving portions 40. The overall shape is substantially U-shaped.

  A screw hole 42 (see FIG. 5) for engaging the slide pin 24 is provided on the distal end side of the torque receiving portion 40. An attachment hole 44 for fixing the support 38 to a vehicle or the like is provided at a joint portion between the torque receiving portion 40 and the support bridge portion 46. In addition, substantially U-shaped concave portions 48 are formed at opposing positions on the opposing side surfaces of the pair of torque receiving portions 40. The recess 48 serves as a slide rail for holding and sliding an inner pad 52 (brake pad), which will be described in detail later.

  The slide pin 24 is screwed into a screw hole 42 provided in the torque receiving portion 40 of the support 38 described above, and serves as a slide rail for the caliper 12 and the outer pad 58 (brake pad), which will be described in detail later. During braking, the outer pad 58 also serves as a torque receiver.

  As shown in FIG. 5, the slide pin has a distal end and a base end extending in the rotor axial direction with respect to the support 38 with the threaded portion 30 as a base point, and has a sliding portion of the outer pad 58 on the front end side. And it will have the sliding part of the caliper 12 in the base end side. For this reason, the slide pin 24 has a bolt head 26 for tightening, a caliper sliding portion 28, a screwing portion 30, and an outer pad sliding portion 32. As will be described in detail later, the caliper 12 according to the present embodiment engages (supports) the slide pin 24 through the through hole 22 provided in the arm portion 20, and the through hole 22, the slide pin 24, In between, a sleeve 34 and a boot 36 are provided. The sleeve 34 ensures the sliding amount of the caliper 12. On the other hand, the boot 36 has a damping function between the sleeve 34 and the through hole 22 while preventing dust from adhering to the sliding portion between the sleeve 34 and the through hole 22.

  The caliper 12 is configured based on the caliper main body 14, the claw portion 18, the caliper bridge portion 16, and the arm portion 20. The caliper body 14 is disposed on the inner side of a rotor (not shown), and is provided with at least a cylinder (not shown) and a piston 15. The hydraulic fluid flows into the cylinder by the brake operation, and the piston 15 is pushed out through the hydraulic fluid that has flowed in, thereby pressing the pressure plate 54 in the inner pad 52 to be described in detail later. A bellows-like piston boot (not shown) is provided between the opening of the cylinder and the tip of the piston 15 to prevent dust from adhering to the sliding portion.

  The claw portion 18 is disposed on the opposite side of the caliper body 14 via the rotor, that is, on the outer side of the rotor, and plays a role of supporting an outer pad 58 described later in detail. The claw portion 18 extends toward the inner side in the rotor radial direction with a caliper bridge portion 16 described later in detail as a base point. For this reason, the nail | claw part 18 and the caliper main body 14 are provided in the position which opposes via a rotor. Further, in the disc brake device 10 according to the present embodiment, the through holes 18a and 18a are provided on both the rotor entrance side and the exit side of the claw part 18, and an outer pad 58, which will be described in detail later, is attached to the inner wall of the claw part 18. It is set as the structure which can be unevenly fitted.

  The arm portion 20 is an engaging portion that extends from the caliper body 14 to both end sides (rotor entry side and exit side). A through hole 22 (see FIG. 5) for engaging the caliper sliding portion 28 in the slide pin 24 is provided on the distal end side of the arm portion 20, and the slide pin 24 is connected to the through hole 22. Engagement is achieved.

  The disc brake device 10 according to this embodiment includes an inner pad 52 that slides in a recess 48 provided in the support 38 and an outer pad 58 that slides on slide pins 24a and 24b as brake pads. Both the inner pad 52 and the outer pad 58 are basically composed of pressure plates 54 and 60 and linings 56 and 62 that are friction members attached to the pressure plates 54 and 60.

  The pressure plate 54 in the inner pad 52 has a plate main body formed in a substantially fan shape by a metal flat plate that is slightly larger than the lining 56, and ears (not shown) protruding from both ends of the plate main body. By loosely fitting the ears of the pressure plate 54 into the recesses 48 formed in the support 38, the inner pad 52 can slide in the axial direction of the rotor. A pad clip 50 made of a metal plate is provided in the concave portion 48 of the support 38 to reduce sliding resistance when the inner pad 52 slides in the rotor axial direction and to prevent dragging during traveling. ing.

  As shown in FIG. 6, the pressure plate 60 in the outer pad 58 has a plate body 60a formed in a substantially fan shape by a metal plate that is slightly larger than the lining 62, and the plate body 60a is used as a base point at both ends of the plate body 60a. The arm portion 60b is provided so as to project substantially in a V shape, and the through hole 66 (66a, 66b) is formed on the distal end side of the arm portion 60b. The outer pad 58 can slide on the slide pin 24 by inserting the outer pad sliding portion 32 of the slide pin 24 through the through hole 66 of the arm portion 60b. Further, on the contact surface of the outer pad 58 with the claw portion 18 opposite to the lining attachment surface of the pressure plate 60, a pair of convex portions 64 are provided at positions corresponding to the through holes 18 a provided in the claw portion 18 of the caliper 12. Is formed. By fitting the pair of convex portions 64 into the through holes 18 a (concave portions) of the claw portion 18, the caliper 12 can be stably held with respect to the outer pad 58.

  In addition, the outer pad 58 according to this embodiment is provided with a second clip 68 on the contact surface of the pressure plate 60 with the claw portion 18. The second clip 68 is a clip having a pair of spring portions 72 extending from both sides with the central portion as a base portion 70. The second clip 68 functions by fixing the base portion 70 to the pressure plate 60a. The base 70 is fixed at the center position between the pair of convex portions 64 provided on the pressure plate 60. Note that examples of fixing means for the base portion 70 include caulking and screwing.

  In the outer pad 58 provided with such a second clip 68, when the outer pad 58 is fixed to the claw portion 18, the convex portion 64 provided on the pressure plate 60 is fitted into the through hole 18 a, and the second clip 68 By sandwiching the portion 18, the outer pad 58 is biased toward the claw portion 18. Thereby, falling of the outer pad 58 can be prevented, and uneven wear of the lining can be prevented. Further, the outer pad 58 is in stable contact with the slide pin 24 by a pair of pad clips 74 which will be described in detail later. For this reason, by urging the claw portion 18 against the outer pad 58 stably held via the slide pin 24, it is possible to prevent and stabilize the caliper 12 from rattling. Note that, as in the second clip 68, by increasing the distance from the base portion 70 to the tip that is the point of action of the spring portion 72, variation in load can be suppressed. In the present embodiment, the concave portion provided on the inner wall of the claw portion 18 is expressed as the through hole 18, but a bottomed bag hole may be used instead of the through hole.

Further, in the disk brake apparatus 10 according to the present embodiment, the through hole 66a in the outer pad 58, a center pitch _{P 1} of the 66b, the slide pins 24a, 24b around the pitch _{P 2} and the _P 1 of> _{P 2}
So as to satisfy the relationship, the through-hole 66a, the pitch _{P 1} of 66b are determined. In the case of such a configuration, as shown in FIG. 7, when a low braking torque is generated such as at the initial stage of braking, the inner wall of the through hole 66b contacts only the slide pin 24b arranged on the delivery side, and only the slide pin 24b. A braking torque is applied. On the other hand, when a high braking torque is generated, the slide pin 24b arranged on the delivery side bends in the braking torque load direction, and the inner wall of the through hole 66a contacts the slide pin 24a arranged on the entry side. Thus, the braking torque is distributed to the pair of slide pins 24a and 24b. Thus, by making it possible to disperse the braking torque according to the level of the braking torque, there is no need to reinforce the strength such as increasing the diameter of the slide pin 24, and accompanying an increase in the diameter of the slide pin. An increase in weight or the like can be suppressed.

  The outer pad 58 is provided with a pair of pad clips 74 (first pad clips) on the arm portion 60b. The pad clip 74 provided on the arm portion 60b urges the slide pins 24a and 24b inserted through the through holes 66a and 66b, and presses the outer pad 58 held by the pad clip 74 in the direction opposite to the urging direction. Take on. As the pad clip 74 according to the present embodiment, the same one is adopted on the turn-in side and the turn-out side of the rotor. As shown in detail in FIGS. 8 and 9, the specific configuration is configured based on a base portion 76, a support portion 80, and a spring portion 82. The base portion 76 is a portion positioned between a support portion 80 and a spring portion 82, the details of which will be described later. In the case of this embodiment, a through hole 78 for inserting the slide pin 24 is provided, and the pressure plate 60 is provided. It is arranged along the surface. The support portion 80 is configured by a plate piece bent from the base portion 76 toward the pressure plate 60 side of the outer pad 58. The support part 80 can clamp the pressure plate 60 in the thickness direction by forming the plate pieces in a substantially U shape (horizontal U shape). The spring portion 82 is a plate piece that is bent and formed in a roll shape from the base portion 76 toward the opposite side to the support portion 80. By pressing the roll portion formed in this way against the slide pin 24, the pressure plate 60 held by the support portion 80 is drawn toward the spring portion 82 side. That is, by using the pad clip 74 according to the present embodiment, the outer pad 58 can be drawn in the arrangement direction of the spring portion 82 with the slide pin 24 as a base point (earth), It is possible to suppress a cronk sound (click sound) during braking. The pad clip 74 having such a configuration has good workability because the bending direction for forming the support portion 80 and the spring portion 82 is one direction that does not include twist. In addition, since the flat form in the unfolded state is simple and the plate-making property is good, the material yield is good and the manufacturing cost is low.

  The pressing direction of the outer pad 58 depends on how the pad clip 74 is attached to the arm portion 60b. For example, in the case of the present embodiment, as shown in FIG. 6, the side of the arm portion 60b extending in a substantially V shape with the plate body 60a as a base point is positioned on the outer side in the rotor radial direction by the support portion 80, The base portion 76 is attached so as to overlap the through holes 66 (66a, 66b). In the case of such an attachment form, the pad clip 74 disposed on the rotor entry side causes the spring portion 82 to contact the slide pin 24a toward the rotor delivery side on the outer side in the rotor radial direction. As a result, the outer pad 58 receives a force pressed against the slide pin 24a toward the rotor turning-in side on the inner side in the rotor radial direction. As a result, in the through hole 66a, the inner peripheral surface located on the rotor outlet side on the outer side in the rotor radial direction is urged to the slide pin 24a. On the other hand, the pad clip 74 disposed on the rotor delivery side brings the spring portion 82 into contact with the slide pin 24b toward the rotor entry side on the outer side in the rotor radial direction. As a result, the outer pad 58 receives a force that is pressed against the slide pin 24b toward the inner side of the rotor in the radial direction of the rotor. As a result, in the through-hole 66b, the inner peripheral surface located on the rotor turn-in side on the outer side in the rotor radial direction is biased toward the slide pin 24b (see FIG. 10).

In the present embodiment, in order to stabilize the assembled form of the pad clip 74, a seat 65 is provided on the side sandwiched by the support portion 80, and the center O of the arc portion (dominant arc) constituting the through hole 66 is moved from the center O to the seat 65. A straight line l ₁ (second straight line) that extends toward the seat 65 intersects the seat 65 perpendicularly. In the case of such a configuration, as shown in FIGS. 11 to 13, a straight line l ₀ (straight line 1) along the radial direction of the rotor passing through the center O of the arc portion and a straight line l ₁ perpendicular to the seat 65. Is changed, the ratio of F ₁ (circumferential direction) and F ₂ (radial direction), which are component forces of the urging force by the pad clip 74, can be changed. The relationship between the component forces F ₁ and F ₂ associated with the change in the angle θ is as follows. That is, the relationship is F ₁ <F ₂ when θ <45 °, F ₁ = F ₂ when θ = 45 °, and F ₁ > F ₂ when θ> 45 °.

  In the present embodiment, the form of the through hole 66 in the outer pad 58 is as follows. That is, as shown in FIG. 13, the planar shape of the wall surface on the side where the slide pin 24 is pressed is arcuate, the wall surface opposite to the pressing side is flat, and so-called arcs and strings are combined. In the case of the present embodiment, a horseshoe-shaped through-hole 66 is formed by combining a longer arc-shaped portion of two arcs that can be divided into circles by strings, that is, a combination of a superior arc portion 67a and a chord portion (gap filling portion) 67b. is doing. In the disc brake device 10 according to the present embodiment, the outer pad 58 is pressed against the slide pin 24 by the pad clip 74. For this reason, a large gap is generated between the slide pin 24 and the wall surface of the through hole 66 located on the side opposite to the side where the slide pin 24 is pressed. When an unnecessarily large gap is provided between the slide pin 24 and the wall surface of the through hole 66, the rattle noise between the slide pin 24 and the through hole 66 increases. Therefore, by narrowing a part of the through-hole 66 so as to fill the gap, unnecessary rattling can be prevented and rattle noise can be suppressed.

  According to the disc brake device 10 having such a configuration, the outer pad 58 fitted to the claw portion 18 is supported on the slide pin 24 by metal touch. For this reason, the caliper 12 locked to the slide pin 24 via the sleeve 34 and the boot 36 can be prevented from falling down, and rattling can be suppressed.

  Next, the operation at the time of braking in the disc brake device 10 having such a configuration will be described. First, when the vehicle driver operates a brake pedal or a brake lever (not shown), the cylinder of the caliper body 14 is filled with hydraulic oil. As the hydraulic oil fills the cylinder, the piston 15 accommodated in the cylinder is pushed out to the rotor side. The piston 15 pushed out from the cylinder presses the pressure plate 54 of the inner pad 52 supported by the torque receiving portion 40 of the support 38 and presses the lining 56 of the inner pad 52 against the sliding surface of the rotor. When the lining 56 of the inner pad 52 is pressed against the rotor, the caliper body 14 receives a reaction force of the pressing force and slides along the slide pin 24 so as to be separated from the rotor. When the caliper main body 14 slides away from the rotor, the claw portion 18 connected to the caliper main body 14 by the caliper bridge portion 16 operates so as to be drawn toward the rotor side. When the claw portion 18 is pulled toward the rotor side, the pressure plate of the outer pad 58 fixed to the claw portion 18 is pressed by the claw portion 18 and slides toward the rotor side along the slide pin 24, and the lining 62 is the rotor sliding surface. Pressed against.

  When the rotor sliding surface is sandwiched between the inner pad 52 and the outer pad 58 by the above-described operation, the inner pad 52 and the outer pad 58 receive a force that rotates in the rotor extending direction due to the frictional force. At this time, the inner pad 52 abuts against the concave portion 48 formed in the torque receiving portion 40 of the support 38 at the ear portion of the pressure plate 54 and generates a braking force by receiving the braking torque generated during braking. On the other hand, the outer pad 58 receives a braking torque by both the slide-side slide pin 24b and the slide-side slide pin 24a, and transmits this to the support 38 fixed to the vehicle body, thereby generating a braking force. As described above, the braking torque in the outer pad 58 is distributed and inputted to the slide pin 24b on the delivery side and the slide pin 24a on the delivery side.

  Further, in the disc brake device 10 according to the present embodiment, since the inner peripheral surface located on the radially outer side of the through hole 66 is pressed against the slide pin 24, the outer pad 58 applies braking torque. When received, on the pulling side (turn-in side), as shown in FIG. 14, along the inner peripheral surface of the arc portion 67a in the through hole 66a (along the trajectory indicated by the dotted line and the broken line), the slide pin 24a Therefore, the pressure plate 60 is displaced so as to move. For this reason, there is no situation in which the slide pin 24a suddenly collides with the opposite wall surface at the time of high braking torque load, and the switching from the push anchor to the push + pull anchor is not performed abruptly. Can be stabilized. As a result, the cronk sound (click sound) during braking is suppressed. In the disc brake device 10 according to the present embodiment, since only the inner pad 52 is held by the support 38, the support 38 does not need to be configured to straddle the rotor. For this reason, the cutting time of the support 38 for forming the recess on the outer side can be shortened and the weight can be reduced.

  The disc brake device 10 having the above-described configuration and operating as described above is configured by assembling as follows. First, the inner pad 52 is disposed on the support 38, and the outer pad 58 is fitted on the claw portion 18 of the caliper 12. Thereafter, the slide pin 24 is attached in a state where the caliper 12 is held at a predetermined position. The slide pin 24 is inserted through the through hole 66 of the outer pad 58 on the distal end side and the through hole 22 of the caliper 12 on the proximal end side with the threaded portion 30 as a base point.

  In the above embodiment, the planar shape of the through hole 66 has been described as a horseshoe shape formed by combining a dominant arc and a string. However, as a function thereof, the braking torque can be distributed to the slide pins 24a and 24b. I just need it. Therefore, the through-hole 66 in the present application includes one having a slit 63 as shown in FIG. That is, if the wall surface is not related to the urging of the slide pin 24 and the pressing of the slide pin 24 at the time of braking torque load, it can be regarded as a through hole even if a part of the inner wall surface of the through hole 66 is missing. .

  In the example shown in FIG. 10, the through hole is described as being configured by the dominant arc portion 67 a and the chord portion 67 b, but the through hole in the present application is configured as shown in FIGS. 16 and 17. Also good. The through-hole 66a1 (66b1) shown in FIG. 16 has a convex portion 67c formed by projecting the portion that was the chord portion 67b of the through-hole 66a (66b) on the dominant arc portion 67a side (center side of the arc). It is what you have. The outer pad 58 moves the slide pin 24 along the arc of the superior arc portion 67a. For this reason, the distance between the chord portion 67b and the arc increases in the vicinity of the center line. On the other hand, by adopting the convex portion 67c instead of the string portion 67b, the overall gap can be reduced and the effect of suppressing the rattle sound can be enhanced.

  Further, in the through hole 66a2 (66b2) shown in FIG. 17, the convex portion 67c in FIG. 16 is curved to form a curved convex portion 67d constituted by an arc. Here, the convex portion 67d is a form in which a subarc that forms a pair with a dominant arc formed by dividing a circle by the chord portion 67b is projected to the dominant arc side so as to be line symmetric with respect to the chord portion 67b. It can be. By making the convex portion into an arc shape, the gap with the slide pin 24 can be further reduced as compared with the case where the convex portion is configured by a straight line.

  Further, each of the above through holes is mainly composed of a circle, but the through hole according to the present embodiment is composed of a combination of a circle and a rectangle (rectangle) as shown in FIG. May be. Specifically, the side (rotor radial direction outer side) that receives the pressing of the slide pin 24 is configured by a circular arc (semicircle: arc portion), and the side that does not receive the pressing (rotor radial inner side) is formed by a square (rectangular portion). It is to compose. With such a configuration, it is possible to widen the gap between the through holes 66a3 and 66b3 located on the rotor turn-in side and the turn-out side on the inner side in the rotor radial direction of the slide pin 24. Therefore, as in the case where the circular hole is divided by the strings and the dominant arc side portion is formed as a through hole (for example, in the case of the example shown in FIG. 10), rattle noise caused by rattling between the slide pin 24 and the through hole 66 is generated. In addition to exerting the suppressing effect, the remaining gap can be widened. Thereby, even if water accumulates between the slide pin 24 and the through-holes 66a3 and 66b3, the water can be easily removed and rust generated in the corresponding portion can be suppressed. In addition, the crack by the stress concentration at the time of braking torque load can be suppressed by providing R at the corner | angular part of the square part in through-hole 66a3, 66b3.

  In the above embodiment, when the diameter of the dominant arc constituting the through-hole 66 is φD and the diameter of the slide pin 24 is φd (see FIG. 10), Δd that is the difference between φD and φd is the slide pin 24 (above In the case of the embodiment, the slide pin 24b) is determined to be shorter than the shift distance of the outer pad 58 obtained by elastic deformation. With such a configuration, the braking torque can be dispersed within a range in which the slide pin 24 is elastically deformed.

  Next, a second embodiment of the disc brake device according to the present invention will be described with reference to FIGS. FIG. 19 is a right bottom perspective view of the disc brake device according to the second embodiment, and FIG. 20 is a front view thereof. Note that most of the configuration of the disc brake device 10a according to the present embodiment is the same as that of the disc brake device 10 according to the first embodiment described above. Therefore, the same reference numerals are given to the portions having the same configuration, and the detailed description is omitted.

  A pair of pad clips 90 (90a, 90b) in the disc brake device 10a according to the present embodiment, a pair of pad clips (first pad clips) 74 and one second pad in the disc brake 10 according to the first embodiment. It plays the role of both clips 68.

  As shown in detail in FIGS. 21 to 26, the pad clip 90 is configured based on a base 92, a first spring portion 94, and a second spring portion 96. In the drawings, FIG. 21 is a plan view of the pad clip, FIG. 22 is a front view, and FIG. 23 is a right side view. 24 and 25 are perspective views showing both the pair of pad clips 90a and 90b, and FIG. 26 is a developed plan view of the pad clip.

  As shown in FIG. 26, the pad clip 90 is configured by bending and forming a plate-like member composed of a first support piece 93 and a second support piece 95 connected to the base 92. Since the first spring portion 94 and the second spring portion 96 have a relationship in which surfaces acting as springs are orthogonal to each other, the planar shape of the first spring portion 94 and the second spring portion 96 is a substantially S-shaped or crank-shaped member in the unfolded state before the bending process. It becomes. The material of the pad clip 90 can be stainless steel or the like.

  The base 92 includes a fixing hole 92a near the center of the plate-like member. The pad clip 90 is fixed to a fixing portion 60c (see FIG. 20) defined in the arm portion 60b of the pressure plate 60 through a fixing hole 92a provided in the base portion 92. The pad clip 90 can be fixed by caulking using unevenness, clamping using another clip, etc., and screwing.

  The first spring portion 94 constituting the pad clip 90 can be formed by bending the first support piece 93. Specifically, the first bent portion 93a of the first support piece 93 is valley-folded in a direction substantially orthogonal to the base 92, and then the second bent portion 93b is mountain-folded. A contact portion is formed by bending the third bent portion 93c located at the tip of the first support piece 93, which has a crank shape and is substantially parallel to the base portion 92, into a wave shape. As a result, the first spring portion 94 can be locked to the claw portion 18 of the caliper 12.

  The second spring portion 96 can be formed by bending the second support piece 95. Specifically, the first bent portion 95 a of the second support piece 95 is valley-folded in a direction substantially orthogonal to the base 92. The second bent portion 95b and the third bent portion 95c provided on the second support piece 95 are both valley-folded.

  The pad clip 90 of the present embodiment configured as described above is arranged in a pair on the return side and the return side of the rotor. However, as shown in FIGS. It is comprised so that it may become a left-right symmetric form by the side and the delivery side. Such a configuration can be achieved by making the reference planes in the folding direction of the first bent portions 93a and 95a from the developed shape different. By arranging the pad clip 90 having such a configuration in a form as shown in FIG. 26, it is possible to improve the plate-making property and to reduce the manufacturing cost.

  As described above, the pad clip 90 is attached by fixing the base portion 92 of the pad clip 90 to the fixing portion 60c provided on the arm portion 60b of the pressure plate 60 in the outer pad 58. Then, the distal end portion of the first spring portion 94 is locked to the claw portion 18, the distal end of the slide pin 24 is inserted into the through hole 66 of the outer pad 58, and the second spring portion 96 is inserted into the outer pad sliding portion 32 of the slide pin 24. By urging the outer pad 58, the outer pad 58 is assembled to the caliper 12. In the present embodiment, as shown in FIG. 19, the tip of the second spring portion 96 of the pad clip 90a provided on the rotor feed-in side is attached to the rotor feed-out side on the inner side in the rotor radial direction with respect to the slide pin 24a. The tip of the second spring portion 96 of the pad clip 90b provided on the rotor delivery side is urged toward the rotor entry side on the inner side in the rotor radial direction with respect to the slide pin 24b. With such an assembled state, the outer pad 58 receives a force that is pushed down inward in the rotor radial direction with the slide pin 24 as a base point (ground).

  Even in the disc brake device having such a configuration, when the braking torque is applied, the braking torque is distributed by the pair of slide pins 24 as in the disc brake device 10 according to the first embodiment.

In the disc brake devices 10 and 10a according to the first and second embodiments, it is assumed that the couple (moment) generated in the outer pad 58 during braking works in the direction indicated by the arrow A as shown in FIG. explained. An example of a means for producing a moment in such a direction, a distance from the rotor center axis C ₁ than the distance t ₁ to moment center of the outer pad 58, from the rotor center axis C ₁ to the center of the through hole 66 t ₂ it is possible to include a long case structure, in accordance with this, configuration of the disc brake device 10,10a according to the embodiment.

  On the other hand, when the couple (moment) generated in the outer pad 58 during braking is reversed as shown by the arrow A ′ (see FIG. 28), the pad is pressed so that the pressing direction of the outer pad 58 against the slide pin 24 is reversed. A clip is attached (a pad clip is not shown). In this case, the relationship between the slide pin 24 and the through hole 66 is as shown in FIG. The urging by the pad clip 74 (see FIG. 8) according to the first embodiment will be described as an example. The pad clip 74 has the spring portion 82 on the rotor radial side on the rotor radial direction with respect to the slide pin 24a. Abut toward. As a result, the outer pad 58 receives a force that is pressed against the slide pin 24a toward the outer side of the rotor in the radial direction of the rotor. As a result, in the through hole 66a, the inner peripheral surface located on the rotor delivery side on the inner side in the rotor radial direction biases the slide pin 24a. On the other hand, the pad clip 74 disposed on the outlet side of the rotor brings the spring portion 82 into contact with the slide pin 24b toward the rotor inlet side on the inner side in the rotor radial direction. As a result, the outer pad 58 receives a force that is pressed against the slide pin 24b toward the outer side of the rotor in the radial direction of the rotor. As a result, in the through-hole 66b, the inner peripheral surface located on the rotor turn-in side on the inner side in the rotor radial direction biases the slide pin 24b.

In the case of such a configuration, the relationship between the dominant arc and the chord in the through-hole 66 is such that the dominant arc is located on the inner side in the rotor radial direction and the chord is located on the outer side in the radial direction. As an example of means for producing a moment in this direction, as shown in FIG. 28, the distance t ₁ from the rotor center axis C ₁ to moment center of the outer pad 58, from the rotor center axis C ₁ A configuration in which the distance to the center of the through hole 66 is longer than t ₂ can be given.

  Next, a third embodiment according to the disc brake device of the present invention will be described with reference to FIGS. FIG. 30 is a right bottom perspective view of the disc brake device according to the third embodiment, and FIG. 31 is a front view thereof. Note that most of the configuration of the disc brake device 10b according to the present embodiment is the same as that of the disc brake device 10 according to the first embodiment described above. Therefore, the same reference numerals are given to the portions having the same configuration, and the detailed description is omitted.

Disc brake device 10b according to the present embodiment is different from the disc brake device according to the first embodiment, the center pitch _{P 2} between centers pitch _{P 1} and the slide pin 24a, 24b between the through holes 66a, 66b in the outer pad 58 Relationship with
P ₁ <P ₂
(See FIG. 32).

  Due to such a configuration, at the time of braking, only the slide pin 24a arranged on the turning-in side comes into contact with the through hole 66a during low braking torque load. On the other hand, when the braking torque increases, the slide pin 24a disposed on the turn-in side bends toward the turn-out side (braking torque direction), and the slide pin 24b disposed on the turn-out side contacts the through hole 66b. As a result, the braking torque is dispersed.

  In the present embodiment, the pair of pad clips 74 urge the outer pad 58 to lift from the slide pin 24 as a base point. For this reason, the through-hole 66 of the outer pad 58 in the disc brake device 10b according to the present embodiment is opposite to the outer pad 10a shown in the first embodiment, the dominant arc portion 67a is on the inner side in the rotor radial direction, and the chord portion 67b is on the inner side. It becomes the form arrange | positioned on the rotor radial direction outer side (refer FIG. 34). The pad clip 74 used in the present embodiment may have the same form as the pad clip 74 according to the first embodiment described above.

  The difference from the disc brake device 10 according to the first embodiment is the attachment form of the pad clip 74 to the outer pad 58. Specifically, as shown in FIG. 31, the side located on the inner side in the rotor radial direction is sandwiched by the support portion 80 with the arm portion 60 b extending in a substantially V shape from the plate body 60 a as a base point, The base portion 76 is attached so as to overlap the through holes 66 (66a, 66b). In the case of such an attachment configuration, the pad clip 74 disposed on the rotor entry side causes the spring portion 82 to abut the slide pin 24a toward the rotor entry side on the inner side in the rotor radial direction. As a result, the outer pad 58 receives a force that is pressed against the slide pin 24a toward the outer side of the rotor in the radial direction of the rotor. As a result, in the through hole 66a, the inner peripheral surface located on the rotor turn-in side on the inner side in the rotor radial direction biases the slide pin 24a. On the other hand, the pad clip 74 disposed on the rotor delivery side brings the spring portion 82 into contact with the slide pin 24b toward the rotor delivery side on the inner side in the rotor radial direction. As a result, the outer pad 58 receives a force that is pressed against the slide pin 24b toward the outer side of the rotor in the radial direction of the rotor. As a result, in the through hole 66b, the inner peripheral surface located on the rotor outlet side on the inner side in the rotor radial direction is urged to the slide pin 24b (see FIG. 33). Therefore, the outer pad 58 according to the present embodiment is provided with a seat 65 for stably holding the pad clip on the side located on the inner side in the rotor radial direction with the arm portion 60b as a base point.

  Further, in the disc brake device 10 according to the present embodiment, since the slide pin 24 is kept pressed against the inner peripheral surface located inside the through hole 66 in the radial direction of the rotor, the outer pad 58 receives the braking torque. At this time, on the push side (outward side), as shown in FIG. 34, along the inner peripheral surface of the dominant arc portion 67a in the through hole 66b (along the locus shown by the dotted line and the broken line), the slide pin 24b Therefore, the pressure plate 60 is displaced so as to move. Therefore, there is no situation in which the slide pin 24b suddenly collides with the opposite wall surface at the time of high braking torque load, and the switching from the pull anchor to the pull + push anchor does not occur suddenly, and the contact is changed gradually. Can be stabilized. As a result, the cronk sound (click sound) during braking is suppressed.

  Next, a fourth embodiment according to the disc brake device of the present invention will be described with reference to FIGS. 35 and 36. FIG. FIG. 35 is a right bottom perspective view of a disc brake device according to a fourth embodiment, and FIG. 36 is a front view thereof. Note that most of the configuration of the disc brake device 10c according to the present embodiment is the same as that of the disc brake device 10a according to the second embodiment described above. Therefore, the same reference numerals are given to the portions having the same configuration, and the detailed description is omitted.

  The form of the through hole 66 of the outer pad 58 in the disc brake device 10c according to the present embodiment is similar to the third embodiment, in which the dominant arc portion 67a is disposed on the inner side in the rotor radial direction and the chord portion 67b is disposed on the outer side in the radial direction. The outer pad 58 is urged radially outward with respect to the slide pin 24 as a reference. Moreover, the pad clip 90 (90a, 90b) employ | adopted by this embodiment is the same as the pad clip 90 used for the disc brake apparatus 10a which concerns on 2nd Embodiment. The difference from the disc brake device 10 a according to the second embodiment is in the urging direction of the tip of the second spring portion 96 in the pad clip 90 with respect to the slide pin 24.

  Specifically, the tip of the second spring portion 96 of the pad clip 90a provided on the rotor retraction side is urged toward the rotor retraction side on the outer side in the radial direction of the rotor with respect to the slide pin 24a. The tip of the second spring portion 96 of the pad clip 90b provided on the side is urged toward the rotor outlet side on the outer side in the rotor radial direction with respect to the slide pin 24b. In such an assembled state, the outer pad 58 receives a force that is pushed up outward in the rotor radial direction with the slide pin 24 as a base point (ground).

  Even in such a configuration, when the braking torque is applied, the braking torque is dispersed by the pair of slide pins 24 as in the disc brake device 10 according to the first embodiment.

Also in the disc brake devices 10b and 10c according to the third and fourth embodiments, it is assumed that the couple (moment) generated in the outer pad 58 during braking works in the direction indicated by the arrow A as shown in FIG. explained. As described above as an example of a means for producing a moment in this direction, than the distance t ₁ from the rotor center axis C ₁ to moment center of the outer pad 58, from the rotor center axis C ₁ of the through-holes 66 distance t ₂ to the center can be cited of the long case configuration.

  On the other hand, when the couple (moment) generated in the outer pad 58 during braking is reversed as shown by the arrow A ′ (see FIG. 28), the pad is pressed so that the pressing direction of the outer pad 58 against the slide pin 24 is reversed. A clip is attached (a pad clip is not shown). This is because in the case of a so-called pulling anchor, after the through hole 66a receives a braking torque, the outer pad 58 rotates in the couple generation direction with the through hole 66a as a base point. In this case, the relationship between the slide pin 24 and the through hole 66 is as shown in FIG. In the specific description, the urging by the pad clip 74 (common to the first embodiment: see FIG. 8) used in the third embodiment will be described as an example. The made pad clip 74 makes the spring portion 82 abut against the slide pin 24a toward the rotor entrance side on the outer side in the rotor radial direction. As a result, the outer pad 58 receives a force that is pressed against the slide pin 24a toward the rotor outlet side on the inner side in the rotor radial direction. As a result, in the through hole 66a, the inner peripheral surface located on the rotor turn-in side on the outer side in the rotor radial direction is biased toward the slide pin 24a. On the other hand, the pad clip 74 disposed on the rotor delivery side brings the spring portion 82 into contact with the slide pin 24b toward the rotor delivery side on the outer side in the rotor radial direction. As a result, the outer pad 58 receives a force that is pressed against the slide pin 24b toward the inner side of the rotor in the radial direction of the rotor. As a result, in the through hole 66b, the inner peripheral surface located on the rotor outlet side on the outer side in the rotor radial direction is urged toward the slide pin 24b.

In the case of such a configuration, the relationship between the dominant arc and the chord in the through-hole 66 is such that the dominant arc is positioned on the outer side in the rotor radial direction and the chord is positioned on the inner side in the radial direction. As an example of the means for generating the moment in such a direction, as shown in FIG. 28, the distance t ₁ from the rotor central axis C ₁ to the moment center of the outer pad 58 is the rotor center, as described above. A configuration in which the distance is longer than the distance t ₂ from the axis C ₁ to the center of the through hole 66 can be given.

10 ......... Disc brake device, 12 ......... Caliper, 14 ......... Caliper body, 15 ......... Piston, 16 ......... Caliper bridge part, 18 ......... Claw part, 20 ...... Arm part, 22 ......... Through hole, 24 (24a, 24b) ......... Slide pin, 26 ......... Bolt head, 28 ......... Caliper sliding part, 30 ......... Screw part, 32 ......... Outer pad sliding part 34 ......... Sleeve, 36 ......... Boot, 38 ......... Support, 40 (40a, 40b) ......... Torque receiving part, 42 ......... Screw hole, 44 ......... Installation hole, 46 ......... Support bridge part 48 ......... recess, 50 ......... pad clip, 52 ......... inner pad, 54 ......... pressure plate, 56 ......... lining, 58 ......... outer pad, 60 ......... pressure plate, 60a ......... Rate body, 60b .... Arm part, 62 ... ... Lining, 64 ... ... Projection part, 66 (66a, 66b) ... ... Through hole, 68 ... ... Second clip, 70 ... ... Base part, 72 ......... Spring part, 74 ......... Pad clip, 76 ......... Base part, 78 ......... Through hole, 80 ......... Support part, 82 ......... Spring part, 90 (90a, 90b) ......... Pad clip, 92... Base, 94... First spring portion, 96.

Claims (8)

A caliper, an outer pad having a convex portion that fits into a concave portion of the claw portion of the caliper, and a pair of slide pins that guide the caliper in the axial direction of the rotor, and the braking torque of the outer pad is supported by the slide pin. In the floating type disc brake device,
The pressure plate constituting the outer pad includes a pair of through holes through which the slide pins are inserted,
The center pitch between the pair of through holes and the center pitch between the pair of slide pins are set differently,
The through-hole has a contact portion with the sliding surface of the slide pin on the inner peripheral surface, and a gap between the inner peripheral surface and the slide pin is reduced on the inner peripheral surface located on the opposite side of the contact portion. A disc brake device provided with a gap filling portion.   The through-hole is a superior arc portion configured by a superior arc obtained when the circle is divided by a string, and the gap filling portion is a string portion configured by a straight line obtained by the string. The disc brake device according to claim 1.   3. The disc brake device according to claim 2, wherein the chord portion is a convex portion formed convex toward the center of curvature of the dominant arc portion.   The disc brake device according to claim 2, wherein the chord portion is a curved convex portion that is convex toward the center of curvature of the dominant arc portion.   2. The disc brake device according to claim 1, wherein the through-hole is a circular arc part in which the contact part is configured by a circular arc, and the gap filling part is a square part configured by a square.   The center pitch between the pair of through-holes is set larger than the center pitch between the pair of slide pins, and the through-hole provided on the rotor feed-in side is outside the slide pin in the radial direction of the rotor, In the through hole provided on the rotor delivery side on the side surface located on the side, the outer pad is arranged so that the inner peripheral surface is urged to the side surface located on the rotor delivery side outside the slide pin in the radial direction of the rotor. The disc brake device according to any one of claims 1 to 5, wherein the disc brake device is configured to push down.   The center pitch between the pair of through holes is set to be smaller than the center pitch between the pair of slide pins. In the through hole provided on the rotor delivery side on the side surface located on the side, the outer pad is arranged so that the inner peripheral surface is urged to the side surface located on the rotor delivery side inside the slide pin in the radial direction of the rotor. The disc brake device according to any one of claims 1 to 5, wherein the disc brake device is configured to push up.   8. The disc brake device according to claim 6, wherein the outer pad includes a clip that urges the inner peripheral surface of the through-hole to the sliding surface of the slide pin. 9.

Images