JPH11190371A - Disc brake - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shield a protecting boot from heat during braking, so as to simply attach and remove an outer frictional pad to and from an attaching member. SOLUTION: Arm parts 3 of attaching members 2 are integrally coupled together by means of an outer beam 5, and guide panel parts 15 of pad springs 12 are fitted on pad guide parts of the ant parts 3. Further, a shield plate 18 for preventing frictional heat generated between a friction pad and a disc 1 from being transmitted to a protecting boot 8 is integrally incorporated with each pad spring 12. Further, the shield plate 18 is composed of a planar part 14 integrally incorporated with the guide panel part 15, a curved plate part 19 bent from the tip end side of the planar part 14 in the projecting direction of a lug projected from the friction pad, and a wide planar part 20 integrally incorporated with the planar part 14 through the intermediary of the curved plate part 19 which is formed therein with a cut-out 20A for preventing interference with the lug during replacement of the pads.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc brake suitably used for applying a braking force to, for example, a vehicle or the like.

[0002]

2. Description of the Related Art In general, a disk brake used in a vehicle or the like includes a mounting member having a pair of arms extending in an axial direction so as to straddle the outer periphery of the disk while being spaced apart in a circumferential direction of the disk. A caliper attached to each arm of the member so as to be displaceable, and outer and inner friction pads pressed against the surface of the disk by the caliper, etc., and the end of each arm is formed by an outer beam. There has been known a configuration in which the components are integrally connected to each other to increase the rigidity of the entire mounting member.

In this type of conventional disk brake, at the time of braking operation, a piston provided on the inner side of the caliper slides toward the disk by supplying hydraulic pressure from the outside, and presses the inner friction pad against the disk. At the same time, the caliper receives the reaction force from the piston and slides in its entirety with respect to the mounting member toward the inner side, so that the caliper presses the outer friction pad against the disk. Thus, the braking force is applied to the disk from both sides by the respective friction pads.

In this prior art, a protruding ear portion protruding from a friction pad is fitted to a concave pad guide portion provided on an arm portion side, so that a gap between each arm portion and the friction pad is provided. The rattling is suppressed to a minimum, and the occurrence of abnormal noise such as rattling between the two is reduced even when the vehicle is traveling on a rough road.

Further, the caliper is provided with a pair of sliding pins integrally with each other, and each of the sliding pins is slidably inserted into a guide hole provided in each arm of the mounting member, so that the caliper is attached to the mounting member. And is slidably supported with respect to.
A pair of protective boots made of a flexible material such as rubber are mounted between the caliper and each arm of the mounting member to protect the sliding pins.

[0006]

By the way, in the above-mentioned conventional disk brake, high temperature frictional heat or the like may be generated between the friction pad and the disk or a spark may be generated between the two during the brake operation. is there. Therefore,
The inner side liner has a structure in which a shielding plate extending in the axial direction of the disk is integrally provided along the protection boot in order to shield the protection boot against the frictional heat and the like.
For example, it is disclosed in Japanese Utility Model Laid-Open No. 59-101022 (hereinafter, referred to as other prior art).

However, in such another conventional technique, a pair of sliding pins for supporting the caliper are provided to the left and right of each of the pad guides provided on each arm of the mounting member. Since it is arranged at a position closer to the outside and the interval between the sliding pins is formed to be larger than that between the pad guide portions, the caliper also needs to be formed to have a large overall width in accordance with the interval between the sliding pins. And there is a problem that the entire disk brake becomes large.

On the other hand, by disposing each sliding pin, for example, at a position closer to the upper side (radially outer side of the disk) than each pad guide portion, the interval between the two is reduced, and the overall width of the caliper is reduced to reduce the size. It is possible to achieve this. However, in this case, each shielding plate is connected to a sliding pin (protective boot).
In order to cope with the above, it is inevitable to arrange at a position closer to the inside between each pad guide part (each ear part), and the gap between each shielding plate is narrower than between each ear part, so the friction pad is attached When detached from the member and replaced, the side of each ear protruding from the friction pad easily interferes with the end of the shielding plate.

In particular, in the case where a liner with an integrated shielding plate is also used for the outer side as well as the inner side due to cost measures and the like, the distance between the shielding plates provided on each of the outer side liners is increased. As described above, in addition to being narrower than between the ears of the friction pad, the distal end side of the shield plate extending in the axial direction of the disk along the protective boot is arranged so as to approach the outer beam, and The distance from the plate is reduced.

Thus, when the outer-side friction pad is removed from the mounting member, the ears of the friction pad are easily caught between the outer beam and the shielding plate and easily interfere with each other. There is a problem that a great deal of time is spent for the replacement work, and the overall workability is greatly reduced.

[0011] Also, even in the manufacture of a disc brake, when the friction pad is assembled to the mounting member, the ear side of the friction pad interferes with both the outer beam and the shielding plate,
There is a problem that the assemblability is reduced and the productivity is reduced.

The present invention has been made in view of the above-mentioned problems of the prior art. In the present invention, by providing a shielding plate integrally with a liner or a pad spring, frictional heat or the like during a brake operation is transmitted to the protective boot. Can be cut off, and the replacement of the friction pad can be easily performed.
It is an object of the present invention to provide a disc brake in which the entire width of the caliper is reduced so that the entire caliper can be downsized.

[0013]

In order to solve the above-mentioned problems, according to the present invention, a concave pad guide portion is formed on a pair of arms straddling a disk, and ends of the respective arms are integrally formed by an outer beam. A caliper attached to each arm of the mounting member via a pair of sliding pins so as to be displaceable, and the caliper and the mounting member for protecting the sliding pins. A pair of protective boots provided between each arm portion, a friction pad having a convex ear portion fitted to each of the pad guide portions, and pressed against the surface of the disc by the caliper, The present invention is applied to a disc brake comprising a liner fitted on the pad guide portion side and slidably guiding an ear portion of the friction pad.

A feature of the structure adopted by the first aspect of the present invention is that the liner is provided with a shielding plate for shielding frictional heat generated between the friction pad and the disk from being transmitted to the protective boot. The shielding plate is provided integrally with the liner, and the shielding plate is formed integrally with the liner and extends in the length direction of the arm portion. A plate portion, and a wide plate portion integrated with the flat plate portion through the bent plate portion and formed to be wide to cover the protection boot. In order to avoid interference with the ear portion of the friction pad when replacing the friction pad, a cut portion inclined obliquely outward is formed.

[0015] With this configuration, the front end side of the flat plate portion formed integrally with the liner of the shielding plate is formed as a bent plate portion bent in the protruding direction of the ear portion. The wide plate portion integrated with the flat plate portion through can be disposed at a position closer to the protruding direction of the ear portion than the flat plate portion. Thus, when the friction pad is removed from the mounting member and replaced, etc., the friction pad is directed toward the inclined direction of the cut portion provided on the wide plate while guiding the ears of the friction pad toward the wide plate. The friction pad can be removed so that the ear side of the friction pad does not interfere with the outer beam and the shielding plate.

According to a second aspect of the present invention, a concave pad guide portion is formed on each of an inner side and an outer side of a pair of arms straddling a disk. A mounting member formed by integrally connecting the ends of the mounting member with an outer beam, a caliper displaceably mounted on each arm of the mounting member via a pair of sliding pins, and a protective member for protecting the sliding pins. A pair of protective boots provided between the caliper and each arm of the mounting member, and a convex ear fitted to each of the pad guides; The inner side and outer side friction pads to be pressed, and the inner side and the outer side liners which are fitted to the respective pad guide sides to slidably guide the ears of the respective friction pads,
The present invention is applied to a disc brake comprising a pad spring integrally connected between the respective liners radially outside the disc.

A feature of the structure adopted by the invention of claim 2 is that each liner of the pad spring has a structure for shielding the protective boot from frictional heat generated between the friction pad and the disk. A shield plate is provided, and the pad spring is formed in a symmetrical shape on the inner side and the outer side of the disk, and each shield plate is formed integrally with the liner and is a flat plate portion extending in a length direction of the arm portion. A bent plate portion integrally formed on the distal end side of the flat plate portion and bent in the protruding direction of the ear portion; and a wide portion integrated with the flat plate portion via the bent plate portion to cover the protective boot. The wide plate portion has a cut portion inclined obliquely outward to avoid interference with the ear portion of the friction pad when replacing the friction pad with the pad guide portion. Form Lies in the fact.

With this configuration, when the outer-side friction pad is removed from the mounting member and replaced, the ears of the friction pad are moved toward the wide plate in the same manner as in the first aspect of the invention. While guiding, the friction pad can be taken out so as to escape in the direction of inclination of the cut portion provided in the wide plate portion.

Further, since the entire pad guide portion including each shielding plate can be formed in a symmetrical shape on the inner side and the outer side, this pad spring is used also as one pad guide portion side and the other pad guide. be able to.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a case where a disc brake according to an embodiment of the present invention is applied to an automobile will be described as an example.
This will be described in detail with reference to the accompanying drawings of FIGS.

In the drawing, reference numeral 1 denotes a disk which rotates in the direction of arrow A in FIG. 1 together with the wheels of the vehicle, and 2 denotes a position on the inner side of the disk 1 and is integrated with a non-rotating portion (not shown) of the vehicle. The mounting member 2 is separated from the disk 1 in the circumferential direction as shown in FIGS.
A pair of arms 3, 3 extending in the axial direction so as to straddle the outer periphery of the disc 1, an inner beam 4 integrally connecting the base ends of the arms 3, and a tip end of each arm 3 It is integrally formed with the outer beam 5 connected integrally. The outer beam 5 is formed as a rod-like body elongated in a bow shape between the arms 3 to enhance the rigidity of the entire mounting member 2.

Here, on the base end side (inner side) and distal end side (outer side) of each arm 3, torque receiving portions 3 A, 3 A,. Pad guides 3B, 3B having a substantially concave cross section for guiding each friction pad 9 described later in the axial direction of the disk 1 via each pad spring 12 are formed. The arm 3 has a bottomed guide hole 3C (only one is shown) extending in the axial direction of the disk 1 at a position closer to the radial outside of the disk 1 than each of the pad guides 3B. A sliding pin 7 described later is inserted into the guide hole 3C.

Reference numeral 6 denotes a caliper slidably supported by the mounting member 2. The caliper 6 is disposed on the inner side of the disk 1, as shown in FIG. 2, and has a cylinder bore (not shown) inside. The formed inner leg portion 6A, a bridge portion 6B extending from the inner leg portion 6A to the outer side of the disc 1, and integrally formed on the distal end side of the bridge portion 6B,
An outer leg 6C disposed on the outer side of the disc 1,
It is composed of a pair of mounting portions 6D, 6D protruding from both ends of the inner leg portion 6A to the left and right in FIG.

A pair of sliding pins 7, slidably inserted into the guide holes 3C of the mounting member 2 are mounted on the mounting portion 6D.
The caliper 6 is mounted on each arm 3 of the mounting member 2 so as to be displaceable in the axial direction of the disk 1 via each sliding pin 7. A piston (not shown) is slidably inserted into the cylinder bore of the inner leg 6A, and the piston is supplied with brake fluid pressure from the outside, so that the piston moves through the cylinder bore of the inner leg 6A. It is configured to slide and press each friction pad 9 against the disc 1.

Reference numerals 8, 8 denote a pair of protective boots provided between each arm 3 of the mounting member 2 and each mounting portion 6D of the caliper 6. The protective boot 8 is, as shown in FIGS. For example, it is formed in a bellows shape from an elastic material such as rubber. When the protective boot 8 is inserted into the outer peripheral side of the sliding pin 7, foreign matter such as dust and rainwater enters from the outside between the sliding surface between the sliding pin 7 and the guide hole 3C. It is to prevent that.

Reference numerals 9 and 9 denote inner side and outer side friction pads provided on both sides of the disk 1, respectively. As shown in FIG. 3 and FIG. A lining 10 formed in a fan shape;
The lining 10 is composed of a back metal 11 and the like fixed so as to overlap with the back surface side. Further, on both ends of the backing metal 11, protruding ears 11A, 11A fitted into the respective pad guides 3B of the mounting member 2 are provided to protrude in the circumferential direction of the disk 1.

The friction pads 9 are guided by the respective ears 11A slidably in the axial direction of the disk 1 along the respective pad guides 3B during the brake operation, and are pressed against the surface of the disk 1. , And comes into frictional contact with the disk 1.

Reference numerals 12 and 12 denote a pair of pad springs provided on each arm 3 side of the mounting member 2 so as to be spaced apart from each other in the circumferential direction of the disk 1. The pad springs 12 press a stainless steel plate or the like having spring properties. By molding, it is formed as shown in FIGS. The pad spring 12 is formed to bend so as to engage with the inner side surface of the arm 3, and has a connecting plate 13 extending along the axial direction of the disk 1, and two ends of the connecting plate 13. It is composed of a pair of flat plates 14, 14 formed integrally, a guide plate 15, each receiving plate 16, each pressing plate 17, and the like, which will be described later.

The connecting plate portion 1 of the pad spring 12
Reference numeral 3 denotes a configuration in which the guide plates 15 are connected to each other via the flat plates 14 at positions radially outside the disk 1. As a result, the overall shape of the pad spring 12 is symmetrical on the inner side and the outer side of the disk 1 including the shield plates 18 described later. Further, the flat plate portion 14 is formed integrally with the guide plate portion 15, extends between the guide plate portion 15 and the flat plate portion 14 in the length direction of the arm 3, and
8.

The pad spring 12 urges each of the friction pads 9 to the respective disc guides 1B while urging the respective ears 11A of the friction pads 9 toward the respective pad guides 3B between the respective arms 3.
Are guided in the axial direction.

Numerals 15 and 15 denote pad guides 3 of each arm 3.
FIG. 6 shows inner side and outer side guide plate portions as liners fitted on the B side, and each of the guide plate portions 15 is bent substantially rearwardly from the flat plate portion 14 as shown in FIG. Each ear 11A is configured to be slidably guided in the axial direction of the disk 1.

Reference numerals 16 and 16 denote inner and outer receiving plate portions disposed on the torque receiving portion 3A side of each arm portion 3, respectively. As shown in FIG. 15 is bent at a substantially right angle from the front end located below, and extends downward along the surface of the torque receiving portion 3A.

Reference numerals 17 and 17 denote inner and outer pressing plate portions 17 integrally formed with the respective receiving plate portions 16. The pressing plate portions 17 are, as shown in FIG. ) Is bent at a substantially right angle from the front. And
The pressing plate portion 17 is bent in a substantially “U” shape at its tip end and elastically abuts against the friction pad 9 so that each ear portion 11A of the back metal 11 is connected to the pad guide portion 3B of each arm portion 3.
(The guide plate 15) is pressed against the side to suppress the play between the ear 11A and the pad guide 3B.

Reference numerals 18 and 18 denote inner and outer shielding plates provided integrally with the pad spring 12, respectively.
As shown in FIGS. 1 to 8, the shielding plate 18 is provided with the flat plate portion 14 integrally formed with the connecting plate portion 13 and the guide plate portion 15.
In addition, a bent plate portion 19 bent in an L-shape from the distal end side of the flat plate portion 14 in the protruding direction of the ear 11A, and an L-shaped bent portion of the flat plate portion 14 from the bent plate portion 19 And a wide plate portion 20 extending in the radial direction of the disk 1. Thereby, a space S2 larger than the space S1 between the flat plate portions 14 is secured between the wide plate portions 20, as shown in FIG.

The outer wide plate portion 20 of each shield plate 18 is formed so as to cover the protective boot 8 at a position closer to the radial outside of the disc 1 than the pad guide portion 3B, and will be described later. During the braking operation, the frictional heat generated between the friction pad 9 and the disk 1 causes the protection boot 8
It is configured to block transmission to the side.

As shown in FIGS. 4 and 6, the wide plate portion 20 of the shielding plate 18 has a cut portion obliquely outwardly with respect to the radial direction of the disc 1 from its base end to its tip end. 20A are formed. And the cut portion 20A
Represents a space S between the outer beam 5 and the outer beam 5 as shown in FIG.
3 is secured, and as described later, when the friction pad 9 is replaced, the ear 11A of the friction pad 9 is prevented from interfering with the shielding plate 18 together with the bent plate portion 19.

Reference numerals 21 and 21 denote a pair of fastening bolts for fastening the sliding pin 7 to the mounting portion 6D of the caliper 6.

The disk brake according to the present embodiment has the above-described configuration, and its operation will be described next.

First, when the driver performs a braking operation, the piston slides toward the disk 1 in the inner leg portion 6A of the caliper 6 by supplying hydraulic pressure from the outside, and the piston slides on the friction pad 9 on the inner side. The lining 10 is pressed against the disc 1. Then, the caliper 6 is slid and displaced toward the inner side of the disc 1 by the reaction force from the piston, and the outer leg 6C of the caliper 6 presses the lining 10 of the friction pad 9 on the outer side against the disc 1. As a result, a braking force is applied to the disk 1 from both sides by the friction pads 9.

Here, during the above-described braking operation, high frictional heat may be generated between the disk 1 and the friction pad 9, or sparks may be generated between the two. And
A protective boot 8 for the sliding pin 7 is provided near the friction pad 9.

However, in the present embodiment, the protective boot 8
The outer shielding plate 18 is provided between the friction pad 9 and the friction pad 9. Therefore, the transmission of the frictional heat and the like to the respective protective boots 8 can be blocked by the shielding plate 18. Deterioration of the protective boot 8 can be suppressed.

When replacing each friction pad 9 when performing maintenance or the like of the disc brake, first, one of the fastening bolts 21 of each of the fastening bolts 21 must be replaced.
By detaching 1 from the mounting portion 6D of the caliper 6,
The entire caliper 6 is removed from the mounting member 2 as shown in FIG. Thereby, the inner side friction pad 9
Can be detached from the mounting member 2 so as to be detached from each pad guide portion 3B in the direction of arrow B shown in FIG. Similarly, when the friction pad 9 is attached to the attachment member 2 in the same manner, the friction pad 9 can be attached to the attachment member 2 via each pad guide portion 3B.

However, if the outer-side friction pad 9 is detached in the same manner as the inner-side friction pad 9 described above, the outer-side friction pad 9 abuts on the outer beam 5, and in this case, the outer beam 5 and the pad It is necessary to take out the outer-side friction pad 9 through a narrow space between the spring 12 and the shielding plate 18.

Therefore, in the present embodiment, the wide plate portion 20 of the shielding plate 18 is integrated with the flat plate portion 14 of the pad spring 12 via the bent plate portion 19, so that the left and right wide portions shown in FIG. Left and right flat plate portions 1 are located between the plate portions 20 and 20.
The space S2 larger than the space S1 between the four and the fourteen is secured.

The wide plate portion 20 of the shield plate 18 is provided with a cut portion 20A which is inclined obliquely outward with respect to the radial direction of the disk 1, thereby protecting the protective boot 8 against the frictional heat. 8 between the shielding plate 18 and the outer beam 5 as long as the function of the shielding plate 18 does not deteriorate.
The space S3 shown in FIG.

Thus, when the outer friction pad 9 is removed from the mounting member 2, the spaces S2 and S3 are removed.
By using the friction pad 9 as shown in FIG.
Of the cut portion 20A from the guide plate portion 15 toward the wide plate portion 20 of the shielding plate 18 in the direction of the inclination of the cut portion 20A (in the direction of arrow C).
The whole can be removed so as to be removed from between the outer beam 5 and the shielding plate 18.

Therefore, according to this embodiment, when the outer friction pad 9 is replaced, the friction pad 9 is compared with the mounting member 2 without causing the friction pad 9 to interfere with the outer beam 5 side and the shielding plate 18 side. It can be easily removed and attached, and the time spent for such replacement work can be reduced in the same manner as in the case of the friction pad 9 on the inner side.
Overall workability can be improved. Then, when assembling the disc brake or the like, the workability and the like when assembling the friction pad 9 to the mounting member 2 can be improved, and the overall manufacturing cost and the like can be reduced.

The pad spring 12 is formed integrally with an outer shielding plate 18 in addition to the inner shielding plate 18. The entire shape of the pad spring 12 including these shielding plates 18 is Since the inner side and the outer side are formed in a symmetrical configuration, the pad spring 12 can be shared by the one arm 3 side and the other arm 3 side. Can be enhanced.

Further, by disposing the guide hole 3C of the arm 3 at a position closer to the upper side (radially outer side of the disc 1) than each pad guide 3B, each sliding pin shown in FIGS. Since the width W between the seven is made as small as possible, the disc brake can be formed small in the circumferential direction of the disc 1.

In the above-described embodiment, the space between the flat plate portions 14 of the pad spring 12 in which the shielding plate 18 is integrated is
Although the connection plate 13 is described as being integrally connected by the connection plate 13, the connection plate 13 may be removed from the pad spring 12, for example.
2 may be divided into two on the inner side and the outer side.

In the above-described embodiment, the receiving plate 16 and the pressing plate 17 are integrally formed on the guide plate 15 of the pad spring 12, but the receiving plate 16 may be replaced with the receiving plate 16. The pressing plate 17 may be omitted from the pad spring 12, and the connecting plate 13 may be omitted from the pad spring 12 in addition to the receiving plate 16 and the pressing plate 17.

Further, in the above-described embodiment, the pad springs 12 are provided on both the arm 3 on the inlet side and the arm 3 on the outlet side with respect to the rotation direction A of the disk 1. Instead, the pad spring 12 may be provided only on the arm 3 on the entrance side.

Furthermore, the disc brake has been described as applied to an automobile, but the present invention is not limited to this.
For example, the invention may be applied to a vehicle such as a motorcycle.

[0054]

As described above in detail, according to the first aspect of the present invention, the liner integrally connects the arms of the mounting member with the outer beam, and is fitted to the pad guide of the arm.
A shield plate for shielding the friction heat generated between the friction pad and the disk from being transmitted to the protective boot for the sliding pin is provided integrally, and the shield plate is a flat plate portion integrally formed on the liner, A bent plate portion bent from the distal end side of the flat plate portion in the protruding direction of the ear portion, and a wide plate portion integrated with the flat plate portion through the bent plate portion. ,
When the friction pad is replaced, the cut portion is formed to avoid interference with the ear portion of the friction pad.When the friction pad is replaced with the mounting member, the friction pad is replaced with the cut portion of the wide plate portion. It can be relatively easily removed and attached via the space between the outer beam and the like, and the time spent for such replacement work can be reduced,
Overall workability can be improved. Then, at the time of assembling the disc brake or the like, the workability or the like when assembling the friction pad to the mounting member can be improved, and the overall manufacturing cost and the like can be reduced.

Further, by disposing a sliding pin provided slidably with respect to the arm portion, for example, at a position closer to the radial outside of the disc than the pad guide portion, the width between the sliding pins can be increased. Even when the dimensions are made as small as possible, the shielding plate does not interfere with the friction pad as described above when assembling the friction pad. It can be formed smaller than the disk in the circumferential direction of the disk.

Further, according to the second aspect of the present invention, each arm of the mounting member is integrally connected by the outer beam, and the pad has an inner liner and an outer liner fitted to the pad guide of the arm. The spring has a shield plate integrally provided to shield the frictional heat generated between the friction pad and the disc from being transmitted to the protective boot for the sliding pin, and the shield plate is a flat plate integrally formed on the liner. Portion, a bent plate portion bent from the distal end side of the flat plate portion in the protruding direction of the ear portion,
A wide plate portion integrated with the flat plate portion through the bent plate portion, and a cut portion is formed on the wide plate portion to avoid interference with a lug portion of the friction pad when replacing the friction pad. When the outer-side friction pad is replaced with a mounting member, the friction pad can be relatively easily removed or attached via a space between the cut portion of the wide plate portion and the outer beam. Accordingly, substantially the same effect as that of the first aspect can be obtained.

Further, the pad pad springs are formed symmetrically on the inner side and the outer side including the shielding plate by integrally connecting the respective liners on the radially outer side of the disk. And the other arm side can also be used, and the workability in manufacturing the pad spring can be improved.

[Brief description of the drawings]

FIG. 1 is a front view showing a disc brake according to an embodiment of the present invention.

FIG. 2 is a partially broken plan view showing the disc brake in FIG. 1;

FIG. 3 is a rear view showing the disc brake in a state where the caliper in FIG. 1 is removed.

FIG. 4 is a sectional view showing a state in which a pad spring is attached to an arm, as viewed from the direction of arrows IV-IV in FIG. 3;

FIG. 5 is an enlarged view of a main part in FIG. 1 showing a state in which a pad spring is attached to an arm together with a friction pad.

FIG. 6 is a perspective view showing the pad spring in FIG. 5 as a single body.

FIG. 7 is a plan view showing a friction pad and a pad spring in a state in which a mounting member and a caliper in FIG. 2 are omitted.

FIG. 8 is an enlarged view of a main part in FIG. 4, showing a state in which the friction pad is detached from the mounting member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disc 2 Mounting member 3 Arm part 3B Pad guide part 5 Outer beam 6 Caliper 7 Sliding pin 8 Protective boot 9 Friction pad 11A Ear part 12 Pad spring 14 Flat plate part 15 Guide plate part (liner) 18 Shielding plate 19 Bending plate part 20 Wide plate part 20A Cut part

Claims (2)

[Claims] 1. A mounting member comprising a pair of arm portions straddling a disk, each having a recessed pad guide portion, and end portions of the arm portions integrally connected by an outer beam, and each arm portion of the mounting member. A caliper mounted displaceably via a pair of sliding pins, a pair of protective boots provided between the caliper and each arm of the mounting member to protect the sliding pins, A friction pad that has a convex lug fitted to each of the pad guides and is pressed against the surface of the disc by the caliper; and a lug of the friction pad fitted to the pad guide side. A disc brake comprising a liner for slidably guiding the friction pad, wherein the liner is integrally provided with a shielding plate for shielding frictional heat generated between the friction pad and the disc from being transmitted to the protective boot. The said A shielding plate integrally formed on the liner and extending in the length direction of the arm portion; a bent plate portion integrally formed on a tip side of the flat plate portion and bent in a protruding direction of the ear portion; A wide plate portion integrated with the flat plate portion via a bent plate portion and formed wide to cover the protective boot,
A disc brake, wherein a cut portion inclined obliquely outward is formed in the wide plate portion to avoid interference with the ear portion of the friction pad when the friction pad is replaced with the pad guide portion. 2. A mounting member having concave pad guide portions formed on a pair of arms straddling a disk on an inner side and an outer side, respectively, and ends of the respective arm portions integrally connected by an outer beam; A caliper movably attached to each arm of the mounting member via a pair of sliding pins; and a caliper provided between the caliper and each arm of the mounting member to protect the sliding pins. And a pair of protective boots, inner and outer friction pads having convex ears fitted into the respective pad guides, and pressed against the surface of the disc by the caliper. In order to slidably guide the pad ears, inner and outer liners are fitted to the respective pad guides, and the respective liners are integrally connected on the radially outer side of the disk. Pad spring In a disk brake comprising: a padding plate for shielding the protective boot from frictional heat generated between the friction pad and the disk, provided on each liner of the pad spring; The shielding plate is formed in a symmetrical shape on the inner side and the outer side of the disk, and each of the shielding plates is integrally formed on the liner and extends in the length direction of the arm, and is integrally formed on the tip side of the flat plate. And a bent plate portion bent in the protruding direction of the ear portion, and a wide plate portion integrated with the flat plate portion via the bent plate portion and formed wide to cover the protective boot. The wide plate portion has a cut portion inclined obliquely outward to avoid interference with the ear portion of the friction pad when the friction pad is replaced with the pad guide portion. Disk brake.