JP2003021177A - Disk brake - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk brake capable of securing high sliding performance of a caliper. SOLUTION: A carrier 12 has a moving clearance in the disk rotating direction between an outlet side torque receiving surface 38a on the outlet side in the disk rotating direction and an outer pad 14, in a state in which the outer pad 14 abuts due to own weight on an inlet side torque receiving surface 37a on the inlet side in the disk rotating direction. An upside engaging clearance between a guide hole 21 and a guide pin 23 is lower than a downside engaging clearance between a guide hole 22 and a guide pin 24, and the upside engaging clearance is set larger than the moving clearance of the outer pad 14.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a disc brake suitable for use in a vehicle or the like.

[0002]

2. Description of the Related Art A disk brake for a vehicle is disclosed in, for example, Japanese Patent Application Laid-Open No. 54-111058. The disc brake includes a pair of inner pads and outer pads arranged on both sides of the disc, a carrier arranged so as to straddle the disc, and a carrier that supports the inner pad and the outer pad so as to be movable in the disc axial direction. By fitting a pair of guide pins from the inner pad side into a pair of guide holes that are formed apart from each other on the inner pad side of the carrier, the carrier is supported movably in the disc axial direction, and the inner pad and outer pad are supported. And a caliper that presses in the direction of the disk from both outsides.

In this disc brake, the carrier receives the braking torque introduced from the disc to the inner pad and the outer pad at the time of braking on the inlet side torque receiving surface on the inlet side in the disc rotation direction. When the disc rotation direction inlet side is deformed, it is received by the outlet side torque receiving surface on the disc rotation direction outlet side. In this way, by receiving the initial braking torque on the inlet side in the disk rotation direction, the self-excited vibration of the inner pad and the outer pad is suppressed and the generation of brake squeal is suppressed.

[0004]

By the way, in the case of the above, when the inlet side of the carrier in the disk rotation direction is deformed, the guide hole for supporting the caliper of the carrier and the guide pin are displaced from each other, and the guide hole is displaced. In some cases, the sliding performance of the guide pin, that is, the sliding performance of the caliper may be deteriorated. Further, even when the caliper moves with the pad due to the clearance, the sliding performance of the guide pin with respect to the guide hole, that is, the sliding performance of the caliper may be deteriorated.

Therefore, according to the present invention, while the carrier receives the initial braking torque on the inlet side in the disk rotation direction to suppress the generation of brake squeal, the good sliding performance of the caliper is ensured. The purpose is to provide a disc brake that can

[0006]

In order to achieve the above object, a disc brake according to claim 1 of the present invention comprises a pair of inner pads and outer pads arranged on both sides of the disc, and the disc brake so as to straddle the disc. A carrier that is arranged on the front side of the disc shaft in the vehicle traveling direction and supports the inner pad and the outer pad so as to be movable in the disc axial direction, and a pair of guides formed on the carrier so as to be separated from each other in the disc circumferential direction. A pair of guide pins are loosely fitted in the hole from the inner pad side, and supported by the carrier so as to be movable in the disc axial direction, and a caliper for pressing the inner pad and the outer pad from both outer sides in the disc direction. And the carrier has an inner pad on the inlet side torque receiving surface on the inlet side in the disc rotation direction. Alternatively, when the outer pad is in contact with itself due to its own weight, there is a movement clearance in the disc rotation direction between the outlet side torque receiving surface on the outlet side in the disc rotation direction and the inner pad or the outer pad, and it is located on the upper side in the vertical direction of the vehicle. In the disc brake in which the upper fitting clearance of the guide hole and the guide pin is set to be smaller than the lower fitting clearance of the guide hole and the guide pin located on the lower side in the vertical direction of the vehicle, the inner pad or The upper fitting clearance is set to be larger than the movement clearance of the outer pad.

As described above, when the inner pad or the outer pad is in contact with the inlet side torque receiving surface on the inlet side in the disk rotation direction by its own weight, the inner pad or the outer pad is separated from the outlet side torque receiving surface on the outlet side in the disk rotation direction. Since the upper guide hole and the upper fitting clearance of the guide pin are set to be larger than the movement clearance of the, the carrier applies the braking torque introduced from the disc to the inner pad and the outer pad during braking. Even if it is deformed after being received by the inlet torque receiving surface on the inlet side in the direction, until it is received by the outlet torque receiving surface on the outlet side in the disk rotation direction, the amount of deformation of the guide hole at that time corresponds to the above-mentioned movement clearance. Inside the deformed guide hole due to the upper mating clearance set larger than The guide pin is improved slidably.

According to a second aspect of the present invention, in the disc brake according to the first aspect, half of the lower fitting clearance is larger than the moving clearance of the inner pad or the outer pad. It is characterized by being set.

As described above, when the inner pad or the outer pad is in contact with the inlet-side torque receiving surface on the inlet side in the disk rotation direction by its own weight, the inner pad or the outer pad is separated from the outlet-side torque receiving surface on the outlet side in the disk rotation direction. Since the half of the lower fitting clearance of the lower guide hole and guide pin is set to be larger than the moving clearance of, the braking torque introduced from the disc to the inner pad and the outer pad during braking is set. , The carrier is deformed until it is received by the inlet side torque receiving surface on the inlet side in the disc rotation direction and then received by the outlet side torque receiving surface on the outlet side in the disc rotation direction, and is deformed by the deformation amount corresponding to the moving clearance at that time. Even if the caliper is tilted along the upper guide hole, The amount of movement of the lower guide pin at that time was equivalent to the above-mentioned movement clearance, and the half of the lower mating clearance that was set to a value larger than this would cause the guide pin to move even in the lower guide hole. It becomes possible to slide well.

A disc brake according to a third aspect of the present invention is arranged such that a pair of inner pads and outer pads arranged on both sides of the disc and a rear side of the disc shaft in the vehicle traveling direction so as to straddle the disc. A carrier that supports the inner pad and the outer pad so as to be movable in the disc axial direction, and a pair of guide holes formed in the carrier so as to be separated in the disc circumferential direction, and a pair of guide pins from the inner pad side. The carrier is supported by the carrier so as to be movable in the disc axial direction by being loosely fitted, and has a caliper that presses the inner pad and the outer pad from both outer sides in the disc direction. Disc of the inner pad or the outer pad for the inlet side torque receiving surface of the The inlet side movement clearance in the rolling direction is set to be smaller than the outlet side movement clearance in the disc rotation direction of the inner pad or the outer pad with respect to the outlet side torque receiving surface on the outlet side in the disc rotation direction, and is located on the upper side in the vertical direction of the vehicle. The upper fitting clearance of the guide hole and the guide pin
In a disc brake set to be smaller than a lower fitting clearance of the guide hole and the guide pin located on the lower side in the vertical direction of the vehicle, the lower fitting of the inner pad or the outer pad below the inlet movement clearance of the inner pad or the outer pad. The feature is that the half of the clearance is set larger.

As described above, the half of the lower fitting clearance of the lower guide hole and the lower guide pin is smaller than the moving clearance on the inlet side between the inner pad or the outer pad and the inlet torque receiving surface on the inlet side in the disk rotation direction. Since the value is set to a larger value, the braking force introduced from the disc to the inner pad and outer pad during braking is applied to the outer pad and caliper until the position where the carrier receives the braking torque on the inlet side torque receiving surface in the disc rotation direction. Even when and move integrally to the moving side in the disk rotation direction, the lower guide pin, which was at the center of the lower guide hole when not braking, can slide well in the guide hole.

According to a fourth aspect of the present invention, in the disc brake according to the third aspect, the upper fitting clearance is set to be larger than the outlet side movement clearance of the inner pad or the outer pad. It is characterized by being.

In this manner, the upper guide hole and the upper fitting clearance of the guide pin are set to be larger than the movement clearance between the inner pad or the outer pad and the outlet side torque receiving surface on the outlet side in the disk rotation direction. Therefore, during braking, after the carrier receives the braking torque introduced from the disc to the inner and outer pads on the inlet side torque receiving surface on the inlet side of the disc rotation direction, the carrier side receives the braking torque on the outlet side of the outlet side in the disc rotation direction. Even if the inner pad and the caliper move due to the amount of deformation at that time, the guide pin can be slid well even in the upper guide hole that is the outlet side in the disc rotation direction.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION A disk brake according to a first embodiment of the present invention will be described below with reference to FIGS. In the following description, the vehicle is placed in a normal position where it can be braked.

The disc brake 10 of the first embodiment is
It is arranged on the front side in the vehicle traveling direction with respect to the axis of the disk 11, and is mounted on the non-rotating portion of the vehicle in a non-rotating portion of the vehicle so as to fix the position in the axial direction, the radial direction and the rotating direction of the disk 11. A carrier 12 mounted so as to straddle the front side in the vehicle traveling direction, and a pair of carriers 12 arranged so as to sandwich the disk surface of the disk 11 from both sides on the carrier 12 and supported by the carrier 12 so as to be slidable in the disk axial direction. Inner guide pad 13 and outer pad 14 and two slide guide portions 16, 1 provided on the carrier 12 so as to be separated from each other in the disc rotation direction.
6, a caliper 17 supported so as to be slidable in the disc axial direction and pressing the inner pad 13 and the outer pad 14 from both outer sides in the disc direction.

Here, the disc brake 10 is attached to the non-rotating portion of the vehicle with the right side in FIG. 3 arranged outside the vehicle body with respect to the disc and the left side arranged inside the vehicle body with respect to the disc. In the following, like the inner pad 13 and the outer pad 14, the vehicle body side is referred to as the inner side, and the opposite side to the vehicle body is referred to as the outer side.

The carrier 12 is a pair of groove-shaped pad guides 2 arranged inside the carrier body 19 made of cast metal and the sliding guide portions 16, 16 of the carrier body 19 to guide the inner pad 13 and the outer pad 14.
It is composed of 0 and.

Guide holes 21 and 22 extending from the outer side on the inner pad 13 side in the disc axial direction are formed in the sliding guide portions 16 of the carrier 12 at two places spaced apart from each other in the disc circumferential direction, and are separated from each other by a predetermined distance. The caliper 17 is moved in the disk axial direction of the carrier 12 by loosely fitting the pair of guide pins 23 and 24 provided at a predetermined distance in the pair of guide holes 21 and 22 from the inner pad 13 side. Is supported by possible.

Then, the upper fitting clearance Cm (= φDm-φdm (where φDm is the diameter of the upper guide hole 21 and φdm is the upper side of the guide hole 21 located between the guide hole 21 and the guide pin 23 located on the upper side in the vertical direction of the vehicle). Guide pin 23
)) Is the lower fitting clearance Cs (= φDs−φds (where φDs: the diameter of the lower guide hole 22) between the guide hole 22 and the guide pin 24 located on the lower side in the vertical direction of the vehicle. φds: the diameter of the lower guide pin 24))). Further, when the lower end of the upper guide pin 23 is in contact with the lower end of the upper guide hole 21 due to the weight of the caliper 17, the lower guide pin 24 is substantially centered in the vertical direction of the lower guide hole 22. The distance between the guide holes 21 and 22 and the distance between the guide pins 23 and 24 are set so as to be located at.

As shown in FIG. 3, each of the inner pad 13 and the outer pad 14 has a lining 26 which comes into contact with the disk 11 to generate a frictional force, and a back metal 27 which holds the lining 26 in a fixed state. Disc 1 with the linings 26, 26 facing each other.
It is arranged on both sides with respect to 1.

Inner pad 13 and outer pad 14
1, the inner pad 13 is shown in FIG. 1 and the outer pad 14 is shown in FIG. 2, and the outer side of each backing metal 27 in the disk radial direction (the arrow A direction in FIGS. 1 and 2 is called the disk radial direction). Support portions 30 and 31 each having a shape protruding outward in the radial direction of the disc are formed at both side positions in the disc rotation direction (A direction side in FIGS. 1 and 2).

Here, in the inner pad 13 and the outer pad 14, the support portion 30 on the inlet side in the disc rotation direction at the time of vehicle forward movement, at the inner side surface portion 30a at the time of vehicle forward movement, which is the outlet side in the disk rotation direction at this time, The pad guide 20 of the carrier 12 is guided.

Further, in the inner pad 13 and the outer pad 14, the support portion 31 on the outlet side in the disc rotation direction at the time of forward movement of the vehicle has the carrier on the outer side surface portion 31a which is the outlet side at the time of forward movement of the vehicle at this time in the disc rotation direction. It is adapted to be guided by 12 pad guides 20.

The carrier 12 is arranged at both end positions in the circumferential direction of the disc so as to cross the disc 11 and supports a caliper 17 as a pair of slide guide portions 16, 1.
6 and a wall portion 3 that temporarily extends inward in the disc radial direction on the inner side of the disc 11 from the outer positions of the sliding guide portions 16 in the disc circumferential direction.
3, 33, a main beam 34 that extends in the disc rotation direction on the inner side of the disc 11 and connects the extending distal end portions of the wall portions 33, 33, and the sliding guide portion 1.
6, 16 from the disk 11 in the disk axis direction
The outer side of the disk has walls 35, 35 extending inward in the disk radial direction.

The inner wall 33, 33 and the outer wall 35, 35 have sliding guides 1 respectively.
6, concave portions 37 and 38 are formed, and the wall portion 33 and the wall portion 35 on the same side in the disc rotation direction are
The pad guides 20 having the shapes corresponding to the shapes of the recesses 37 and 38 are fitted in the respective portions. These pad guides 20
Is for supporting and guiding the support portions 30, 31 on both sides of the inner pad 13 and the outer pad 14 in the disc rotation direction.
Guide surface portion 37a that guides the inner side surface portion 30a of the support portion 30 and the guide surface portion 3 that guides the outer side surface portion 30b of the support portion 30 of the inner pad 13 and the outer pad 14.
7b and a guide surface portion 38 for guiding the inner side surface portion 31b of the support portion 31 of the inner pad 13 and the outer pad 14.
b, and a guide surface portion 38a for guiding the outer side surface portion 31a of the support portion 31 of the inner pad 13 and the outer pad 14.
And have.

The pad guides 20, 20 are provided with pressing plates 40a, 40b for pressing the inner pad 13 and the outer pad 14, respectively.

The carrier 12 has a side surface portion 30a on which the inner pad 13 and the outer pad 14 are opposed to the side surface portion 37a, which is the inlet side torque receiving surface of the concave portion 37 on the inlet side in the disc rotation direction, by its own weight when not braking. The contact state, that is, the clearance C _{ENT-in of} these is 0. In this state, the side surface portion 3 which is the outlet side torque receiving surface of the recess 38 on the outlet side in the disc rotation direction.
8a and a side surface portion 31a of the inner pad 13 and the outer pad 14 opposed thereto have a movement clearance C _EX-out in the disc rotation direction (that is, when C _ENT-in = 0, C _{EX- out} > 0).

Further, the carrier 12 and the caliper 17
Is set to be larger at least in the upper fitting clearance Cm than in the movement clearance C _{EX-out of the} outer pad 14 during non-braking (that is, C
_EX-out <Cm). In this embodiment, the inner pad 13
Regarding the above, the upper fitting clearance Cm is set to be larger than the movement clearance C _EX-out .

Further, the carrier 12 and the caliper 17
Is set to be larger than at least the movement clearance C _{EX-out of the} outer pad 14 by half the lower fitting clearance Cs (that is, C _EX-out <
Cs / 2). In this embodiment, also for the inner pad 13, a half value of the lower fitting clearance Cs is set to be larger than the movement clearance C _EX-out .

The caliper 17 is provided with a cylinder portion 52, which is disposed so as to face one side of the disk 11, and the cylinder portion 52.
Disk path portion 53 extending from one side across the outer peripheral portion of the disk 11 and a claw portion extending from the opposite side to the other surface side of the disk 11 from the cylinder portion 52 of the disk path portion 53. 54 and the cylinder portion 5
2 is arranged on the inner side and the claw portion 54 is arranged on the outer side, and the guide pins 23 and 24 are loosely fitted into the guide holes 21 and 22 formed in the slide guide portions 16 and 16 of the carrier 12 to loosen the carrier 12 Supported by.

Then, the cylinder 1 has a disk 1
A bore 57 having a circular cross section is provided so as to open to the first side, and a piston 58 is slidably fitted in the bore 57. The piston 58 is arranged to face the back metal 27 of the inner pad 13 and can press it, and the claw portion 54 is arranged to face the back metal 27 of the outer pad 14 and can press it.

According to the disc brake having such a structure, for example, when the vehicle moves forward, the brake is operated, the piston 58 projects, and the caliper 17 moves the pads 13 and 14 toward the disc 11 by the piston 58 and the claw portion 54. Then, the pads 13 and 14 contact the disk 11 with their respective linings 26 to generate a braking force.

At this time, in the carrier 12, first, the two concave portions 37 on the inlet side in the disk rotation direction are formed into the side surface portions 37a.
In, the braking torque is received from the side surface portion 30a of the support portion 30 on the inlet side of the inner pad 13 and the outer pad 14 in the disc rotation direction.

After that, when the sliding guide portion 16 on the inlet side in the disk rotation direction is deformed by the braking torque, the carrier 12
That is, both the recesses 38 on the outlet side in the disc rotation direction receive the braking torque at the side face portion 38a from the side face portion 31a of the support portion 31 on the outlet side in the disc rotation direction of the inner pad 13 and the outer pad 14.

When the inner pad 13 and the outer pad 14 are in contact with the side surface portion 37a of the recess 37 on the inlet side in the disk rotation direction by its own weight during non-braking, the inner pad 13 and the outer pad 14 exit side in the disk rotation direction. The upper fitting clearance of the upper guide hole 21 and the guide pin 23 is set to be larger than the movement clearance between the concave portion 38 and the side surface portion 38a, so that only the outer pad 14 is shown in FIG. Then, the braking torque introduced from the disk 11 to the inner pad 13 and the outer pad 14 is applied to the carrier 1
2 is a side surface portion 37 of the concave portion 37 on the inlet side in the disc rotation direction.
After being received by a, as shown by the chain double-dashed line in FIG. Even in such a case, the amount of deformation of the guide hole 21 corresponds to the above-mentioned movement clearance. Therefore, the guide hole 21 located on the upper side in the vertical direction of the vehicle as shown in FIG. 21
Between the guide hole 21 and the tip of the guide pin 23 that is in contact with the lower side of the guide hole 21 in the up-down direction of the vehicle by its own weight, and inside the guide hole 21 where the guide pin 23 is deformed, a clearance (see P part in FIG. 4) remains. Even if there is, it will be able to slide well.

Therefore, the caliper 1 is constructed by adopting a structure in which the carrier 12 receives the initial braking torque on the inlet side in the disk rotation direction to suppress the occurrence of brake squeal.
Good sliding performance of No. 7 can be secured.

In addition, when the inner pad 13 and the outer pad 14 are in contact with the side surface portion 37a of the recess 37 on the inlet side in the disc rotation direction by its own weight during non-braking, the inner pad 13 and the outer pad 14 exit side in the disc rotation direction. The half of the lower fitting clearance of the guide hole 22 and the guide pin 24 located on the lower side in the vertical direction of the vehicle is set to be larger than the movement clearance between the concave portion 38 and the side surface portion 38a. , The braking torque introduced from the disk 11 to the inner pad 13 and the outer pad 14 at the time of braking,
Is the side surface portion 37a of the concave portion 37 on the inlet side in the disc rotation direction.
Then, it is deformed until it is received by the side surface portion 38a of the concave portion 38 on the outlet side in the disc rotation direction, and is deformed by the deformation amount corresponding to the movement clearance at that time along the guide hole 21 located on the upper side in the vertical direction of the vehicle. Even when the caliper 17 is tilted as described above, the amount of movement of the vertically lower guide pin 24 of the vehicle, which was substantially at the center of the vertically lower guide hole 22 of the vehicle at the time of non-braking, is equal to the above movement clearance. The guide pin 24 can be satisfactorily slidable even in the lower guide hole 22 by the half value of the lower fitting clearance that is set to be larger than this.

Therefore, after adopting a structure in which the carrier 12 receives the initial braking torque on the inlet side in the disk rotation direction to suppress the generation of brake squeal, the caliper 1
The good sliding performance of No. 7 can be reliably ensured.

Next, a disk brake according to a second embodiment of the present invention will be described below mainly with reference to FIG. The same parts as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

The disc brake of the second embodiment is the first
A disc brake similar to that of the embodiment is arranged on the rear side in the vehicle traveling direction with respect to the axis of the disc 11, and the carrier 12 is attached so as to straddle the rear side of the disc 11 in the vehicle traveling direction.

Then, in the disc brake 10 of the second embodiment, the carrier 12 and the caliper 17 have the upper fitting clearance Cm of the guide hole 21 and the guide pin 23 located on the upper side in the vertical direction of the vehicle, as in the first embodiment. (= ΦDm−φdm) is set to be smaller than the lower fitting clearance Cs (= φDs−φds) of the guide hole 22 and the guide pin 24 located on the lower side in the vertical direction of the vehicle. Further, when the lower end of the guide pin 23 located on the upper side in the vertical direction of the vehicle is in contact with the lower end of the guide hole 21 located on the upper side in the vertical direction of the vehicle by the weight of the caliper 17, the lower guide pin 24 Has a distance set between the guide holes 21 and 22 and a distance between the guide pins 23 and 24 so as to be located substantially at the center of the lower guide hole 22 in the vertical direction.

In the disc brake of the second embodiment,
Indicates that the carrier 12 is the disk rotation method when not braking.
The inner pad 13 is provided on the side surface portion 37a of the recess 37 on the outlet side.
Do not contact the outer pad 14 with its own weight.
This is the clearance C _EX-inIs in the state of 0
The torque on the inlet side of the recess 38 on the inlet side in the disk rotation direction
The side surface portion 38b which is the receiving surface and the inner pad facing the side surface portion 38b
13 and the side surface 31b of the outer pad 14 on the inlet side
Moving clearance C_ENT-inHowever, the disc rotation direction outlet side
The side surface portion 37b which is the outlet side torque receiving surface of the concave portion 37 of
Inner pad 13 and outer pad 14 that face it
In the direction of disc rotation between the side face 30b of the
Side movement clearance C_EX-outSet smaller
(Ie C_ENT-in<C_EX-out).

Further, the carrier 12 and the caliper 17
Is set to be at least half the lower fitting clearance Cs larger than the inlet side movement clearance C _{ENT-in of the} outer pad 14 (that is, C
_ENT-in <Cs / 2). In this embodiment, also for the inner pad 13, the half of the lower fitting clearance Cs is set to be larger than the inlet side movement clearance C _ENT-in (only the inner pad 13 side is shown in FIG. 5). ).

In addition, the carrier 12 and the caliper 17
Is set so that at least the value of the upper fitting clearance Cm is larger than the value of the outlet side movement clearance C _{EX-out of the} outer pad 14 (that is, C _EX-out <
Cm). In this embodiment, also for the inner pad 13, the value of the upper fitting clearance Cm is set to be larger than the value of the outlet side movement clearance C _EX-out .

Further, the carrier 12 and the caliper 17
Is set to be larger than at least the subtraction value obtained by subtracting the inlet side movement clearance C _ENT-in from the outlet side movement clearance C _{EX-out of the} outer pad 14, which is half the lower fitting clearance Cs ( That is, C _EX-out
-C _ENT-in <Cs / 2). In this embodiment, also for the inner pad 13, the exit side movement clearance C _EX-out
A half value of the lower fitting clearance Cs is set to be larger than a subtraction value obtained by subtracting the entrance side movement clearance C _ENT-in from.

The disc brake 10 having the above structure
When the vehicle is moving forward, for example, the brake is operated, the piston 58 projects, and the caliper 17 moves to the piston 5
When the pads 13 and 14 are moved toward the disk 11 by the 8 and the claw portion 54, the pads 13 and 14 come into contact with the disk 11 by the respective linings 26 and generate a braking force.

At this time, the carrier 12 is the inner pad 1
3 and the outer pad 14, the caliper 17 moves to the outlet side in the disc rotation direction together with the inner pad 13 and the outer pad 14 before the braking torque is received.
Become _ENT-in . Even if the caliper 17 moves in this way,
The fitting clearance C on the lower side of the entry clearance C _{ENT-in of the} inner pad 13 and the outer pad 14
Since the half value of s is set larger, the lower guide pin 24, which was at the center of the lower guide hole 22 when not braking, has a clearance secured in the guide hole 22 and slides well. Become mobile.

Therefore, the carrier 12 receives the initial braking torque on the inlet side in the disk rotation direction, so that the good squeezing performance of the caliper 17 can be ensured while adopting the structure for suppressing the generation of the brake squeal. it can.

Then, in the carrier 12, the side surface portions 38b of both recesses 38 on the inlet side in the disk rotation direction receive the braking torque from the side surface portions 31b of the inner pad 13 and the outer pad 14.

By the braking torque thus introduced, the inner pad 13 and the outer pad 14 press the inlet side of the carrier 12 in the disc rotation direction toward the outlet side and deform it. Than the exit side movement clearance C _EX-out ,
Since the value of the upper fitting clearance Cm is set larger, even if the inner pad 13 and the caliper 17 move due to deformation, the clearance is secured in the upper guide hole 21 which is the outlet side in the disc rotation direction and is guided. Pin 2
3 can be slid satisfactorily.

That is, the inner pad 13 and the caliper 17 are moved by a value obtained by subtracting the inlet side movement clearance C _ENT-in from the outlet side movement clearance C _EX-out which is the deformation amount of the carrier 12 due to the above deformation. Although the clearance between the upper guide hole 21 and the guide pin 23, which is the outlet side in the disc rotation direction, is reduced, the movement of the caliper 17 toward the outlet side in the disc rotation direction at the initial _stage of braking already causes the inlet side movement clearance C _{ENT-. Since} the amount of clearance corresponding to _in has decreased, the remaining movable clearance is a value obtained by subtracting the inlet side movement clearance C _ENT-in from the upper fitting clearance Cm, and this value is the above-mentioned deformation. If less than the amount,
A clearance remains between the guide pin 23 and the upper guide hole 23, which is the outlet side in the disc rotation direction,
Since the relationship is C _EX-out- C _ENT-in <Cm-C _ENT-in, it is sufficient to satisfy C _EX-out <Cm.

Moreover, the value of half the lower fitting clearance Cs is smaller than the subtraction value obtained by subtracting the inlet side movement clearance C _ENT-in from the outlet side movement clearance C _{EX-out of} the inner pad 13 and the outer pad 14. Since it is set to be large, even if the guide hole 22 on the inlet side in the disk rotation direction is deformed as in the first embodiment, the guide hole 2
A clearance remains between the guide pin 2 and the tip of the guide pin 24, and the guide pin 24 can slide in the guide hole 22 satisfactorily.

Here, C _ENT-in <Cs / 2, C _ENT-in <
From Cm and C _EX-out- C _ENT-in <Cs / 2, C
_EX-out <Cs / 2 + C _ENT-in <Cs, and the relationship between the upper guide pin 23 and the guide hole 21 and C _EX-out <
Since it is Cm, C _EX-out <Cm <Cs.
Further, since C _EX-out −C _ENT-in > 0, the relationship of the clearances of the respective parts during non-braking can be expressed as follows. 0 ≦ C _ENT-in <C _EX-out <Cm <Cs

Here, the condition of 0 ≦ C _ENT-in is that the pad is urged upward by the spring force of the pad spring even when the brake is not applied, for example, as a measure against a croak noise (that is, C _EX-in > 0. )
This is because there may be cases. On the other hand, since C _EX-out <Cm, C _EX-out −C _ENT-in <C _EX-out <Cm.
In the first and second embodiments, the example in which the present invention is applied to both the inner and outer pads is shown, but it may be applied to either one of the inner and outer pads.

[0055]

As described in detail above, the first aspect of the present invention
According to the disc brake described, in a state in which the inner pad or the outer pad is in contact with the inlet side torque receiving surface on the inlet side in the disc rotating direction by its own weight, the inner pad or the outer pad becomes the outlet side torque receiving surface on the outlet side in the disc rotating direction. Since the upper guide hole and the upper fitting clearance of the guide pin are set to be larger than the clearance between them, the carrier applies the braking torque introduced from the disc to the inner pad and the outer pad during braking. After being received by the inlet torque receiving surface on the inlet side in the rotation direction, even if it is deformed until it is received by the outlet torque receiving surface on the outlet side in the disk rotation direction, the amount of deformation of the guide hole at that time corresponds to the above movement clearance, Due to the upper fitting clearance that is set larger than this, inside the deformed guide hole The guide pin is improved slidably even.

Therefore, it is possible to ensure good sliding performance of the caliper while adopting a structure in which the generation of brake squeal is suppressed by the carrier receiving the initial braking torque on the inlet side in the disk rotation direction.

According to the disc brake of the second aspect of the present invention, when the inner pad or the outer pad is in contact with the inlet side torque receiving surface on the inlet side in the disc rotating direction by its own weight, the disc rotating direction of the inner pad or the outer pad is determined. The half of the lower fitting clearance of the lower guide hole and guide pin is set to be larger than the moving clearance between the outlet side and the torque receiving surface of the outlet side. After the carrier receives the braking torque introduced to the pad and the outer pad on the inlet side torque receiving surface on the inlet side in the disk rotation direction, it deforms until it is received on the outlet side torque receiving surface on the outlet side in the disk rotation direction. Even if the caliper tilts along the upper guide hole that is deformed by the amount of deformation equivalent to the above movement clearance. Movement amount of the time the lower guide pins at the heart of the lower guide hole during non-braking is
The guide pin can be slid well even in the lower guide hole with a half value of the lower fitting clearance that is set to be larger than the above-mentioned movement clearance.

Therefore, it is possible to surely secure good sliding performance of the caliper while adopting a structure in which the generation of brake squeal is suppressed by the carrier receiving the initial braking torque on the inlet side in the disc rotation direction. .

According to the disc brake of the third aspect of the present invention, the guide hole and the guide below the inlet side movement clearance between the inner pad or the outer pad and the inlet side torque receiving surface on the inlet side in the disc rotation direction. Since the half of the lower fitting clearance of the pin is set to a larger value, the braking torque introduced from the disc to the inner pad and outer pad during braking is received by the carrier on the inlet side torque receiving side on the inlet side in the disc rotation direction. Even if the outer pad and caliper move integrally to the movement side in the disc rotation direction up to the position where they are received by the surface, the lower guide pin, which was at the center of the lower guide hole when not braking, satisfactorily fits inside the guide hole. It becomes slidable.

Therefore, it is possible to ensure good sliding performance of the caliper while adopting a structure in which the occurrence of brake squeal is suppressed by the carrier receiving the initial braking torque on the inlet side in the disc rotation direction.

According to the disc brake of claim 4 of the present invention, the guide hole above the guide pin and the guide pin above the moving clearance between the inner pad or the outer pad and the outlet side torque receiving surface on the outlet side in the disc rotation direction. Since the mating clearance is set larger, the braking torque introduced from the disc to the inner pad and outer pad during braking is received by the carrier on the inlet side torque receiving surface on the inlet side of the disc rotation direction, Deforms until it is received by the outlet torque receiving surface on the outlet side in the rotation direction,
Even if the inner pad and the caliper move due to the amount of deformation at that time, the guide pin can slide well even in the upper guide hole that is the outlet side in the disc rotation direction.

Therefore, it is possible to surely secure good sliding performance of the caliper while adopting a structure in which the generation of brake squeal is suppressed by the carrier receiving the initial braking torque on the inlet side in the disc rotation direction. .

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an inner side of a disc brake according to a first embodiment of the present invention, which is taken along a direction orthogonal to an axis when viewed from the disc side.

FIG. 2 is a cross-sectional view of the outer side of the disc brake according to the first embodiment of the present invention, taken along the axis orthogonal direction as seen from the disc side.

FIG. 3 is a sectional view taken along the axial direction showing the disc brake of the first embodiment of the present invention.

FIG. 4 is a schematic diagram showing a relationship between a carrier, an outer pad, and a caliper when braking the disc brake according to the first embodiment of the present invention.

FIG. 5 is a cross-sectional view of the inner side of the disc brake according to the second embodiment of the present invention, taken along the axis orthogonal direction as seen from the disc side.

[Explanation of symbols]

10 Disc Brake 11 Disc 12 Carrier 13 Inner Pad 14 Outer Pad 17 Caliper 21, 22 Guide Hole 23, 24 Guide Pin 37a Side Side (Inlet Side Torque Receiving Side) 38a Side View (Outlet Side Torque Receiving Side) C _EX-out Outlet Side Moving clearance (moving clearance) C _ENT-in Entrance side moving clearance

Claims (4)

[Claims] 1. A pair of inner pads and outer pads arranged on both sides of the disc, and a pair of inner pads and outer pads arranged on the front side of the disc shaft in the vehicle traveling direction so as to straddle the disc and move the inner pad and the outer pad in the disc axial direction. By allowing a pair of guide pins to loosely fit from the inner pad side into a pair of guide holes formed in the carrier and a carrier that is supported so as to be separated from each other in the disc circumferential direction, the disc axis of the carrier is formed. And a caliper that presses the inner pad and the outer pad from both outer sides in the disk direction, the carrier being supported so as to be movable in the direction, and the carrier is the inner pad or the inner pad on the inlet side torque receiving surface on the disk rotation direction inlet side. When the outer pad is in contact with its own weight, There is a movement clearance in the disc rotation direction between the mouth side torque receiving surface and the inner pad or the outer pad, and the upper fitting clearance of the guide hole and the guide pin located on the upper side in the vertical direction of the vehicle is In the disc brake set to be smaller than the lower fitting clearance of the guide hole and the guide pin located on the lower side in the vertical direction, the upper fitting clearance is larger than the movement clearance of the inner pad or the outer pad. Disc brake characterized by being set. 2. The disc brake according to claim 1, wherein a half of the lower fitting clearance is set to be larger than the movement clearance of the inner pad or the outer pad. 3. A pair of inner pads and outer pads disposed on both sides of the disc, and a rear side of the disc shaft in the vehicle traveling direction so as to straddle the disc, and the inner pad and the outer pad are disposed in the disc axial direction. A carrier supported so as to be movable, and a pair of guide holes formed in the carrier so as to be separated from each other in the circumferential direction of the disk are loosely fitted with a pair of guide pins from the inner pad side, whereby the disk is mounted on the carrier. And a caliper that is movably supported in the axial direction and presses the inner pad and the outer pad from both outer sides in the disk direction, and the carrier is the inner pad with respect to the inlet side torque receiving surface on the inlet side in the disk rotation direction. Alternatively, the inlet side movement clearance of the outer pad in the disc rotation direction is
The guide hole and the guide pin are set to be smaller than the clearance of the outlet side movement of the inner pad or the outer pad with respect to the outlet side torque receiving surface on the outlet side in the disc rotation direction and located on the upper side in the vertical direction of the vehicle. In a disc brake in which an upper fitting clearance is set to be smaller than a lower fitting clearance of the guide hole and the guide pin located on the lower side in the up-down direction of the vehicle, a clearance of the inlet side movement of the inner pad or the outer pad is set. Also, the disc brake is characterized in that the half of the lower fitting clearance is set to be larger. 4. The disc brake according to claim 3, wherein the upper fitting clearance is set to be larger than the outlet side movement clearance of the inner pad or the outer pad.