JPH1026155A - Structure for supporting outer pad of disk brake - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the production efficiency of an outer pad. SOLUTION: A caliper claw part 40 of a caliper 14 disposed to span the outer peripheral edge of a rotor 12 is provided with a mounting hole 42 extending therethrough. The shaft part 46 of a locking pin 44 is forced into the mounting hole 42 from the inner surface side of the caliper claw part 40. A head 48 of the locking pin 44 projecting to the inner surface of the caliper claw part 40 is fitted in an engaging hole 52 formed in a back metal 50 of an outer pad 38 to support the outer pad 38.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support structure for an outer pad of a disc brake, and more particularly, to transmitting a braking torque acting on the outer pad to a support fixed to a vehicle body via a guide pin for guiding a caliper in a rotor axial direction. The present invention relates to an outer pad support structure for a disc brake.

[0002]

2. Description of the Related Art As a disc brake, a caliper disposed across an outer peripheral edge of a rotor is supported by a guide pin provided on a support fixed to a vehicle body so as to be movable in an axial direction of the rotor. Is supported movably in the axial direction of the rotor, the outer pad is held by a pair of claws provided on the caliper, and during braking, the inner pad is pressed against the inner surface of the rotor by hydraulic means provided on the inner side of the caliper. In some cases, the caliper moves to the inner side along the rotor axis due to the reaction force, so that the outer pad held by the caliper claw portion is pressed against the outer surface of the rotor. In such a disc brake, a braking torque acting on an inner pad is directly received by a support during braking, and a braking torque acting on an outer pad is transmitted to the support via a caliper and a guide pin.

In order to hold the outer pad with a pair of caliper claws, for example, as shown in Japanese Utility Model Publication No. 2-10828, a mounting hole penetrated in the direction of the rotor axis is provided in each caliper claw. This is achieved by fitting a pair of projections formed on the back surface of the back pad of the outer pad into the mounting holes. In general, the projection of the back metal is formed by half-punching with a punch or the like from the front side of the back metal to which the friction member is attached.

[0004]

However, when the outer pad is processed to a predetermined thickness or the flatness is secured, the outer pad is arranged and fixed on a table and the front surface of the friction member is ground. Since the outer pad needs to be fixed to the table, if a projection is formed on the back surface of the back metal, a hole for fitting the projection must be formed in the table. In addition, the size and shape of the outer pad differ depending on the type of vehicle and the like, and the distance between the pair of projections varies. For this reason, a hole corresponding to one of the pair of protrusions provided on the table is formed in a long hole shape, and many man-hours are required to fix the outer pad, and the production efficiency is not good. In addition, since the projection is formed by half blanking, the thickness of the back metal at the base end of the projection is easily reduced, and it has been difficult to compensate for this.

The present invention has been made to solve the above-mentioned drawbacks of the prior art, and has as its object to improve the production efficiency of outer pads.

[0006]

In order to achieve the above-mentioned object, an outer pad supporting structure for a disk brake according to the present invention is provided so as to straddle the outer peripheral edge of a rotor and to be fitted in a guide hole and a guide hole. A caliper supported movably in the axial direction of the rotor by a support fixed to the vehicle body via a sliding guide mechanism comprising guide pins that are fitted together, and the inner pad is fixed to the rotor by hydraulic means provided on the caliper. As the caliper moves in the rotor axial direction due to the reaction force, the outer pad held by the caliper claw portion is pressed against the other side of the rotor, and the braking torque acting on the outer pad is reduced by the caliper. In the outer pad supporting structure of the disc brake transmitted to the support through the caliper claw portion and the back pad of the outer pad, It provided with a hole in the corresponding position, and has a configuration in which the outer pad is fitted the locking pin formed separately to each hole was supported by the caliper claw portion.

[0007]

According to the present invention constructed as described above, since there is no need to form a projection on the back surface of the back pad of the outer pad, it is possible to easily fix the outer pad to the table when processing the outer pad, thereby improving the production efficiency of the outer pad. can do. Moreover, the engagement holes formed in the back metal of the outer pad
Since the outer pad is supported by the caliper claw portion by engaging the locking pin attached to the caliper claw portion, there is a portion of the outer pad back metal where the thickness of the portion transmitting the braking torque to the caliper is reduced. And the strength of the back metal can be improved.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of an outer pad support structure for a disc brake according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a plan view, partially cut away, of a disk brake having an outer pad support structure according to an embodiment of the present invention, and FIG. 2 is a view of the disk brake viewed from the outer side. In these figures, the disc brake 10
Is a caliper 1 disposed over the outer peripheral edge of the rotor 12.
Four. The caliper 14 is provided with a cylinder portion 16 constituting a hydraulic means on the inner side of the rotor 12. A piston (not shown) is provided inside the cylinder portion 16 so as to be movable in the axial direction of the rotor 12. By operating the piston, an inner pad 18 disposed on the inner side of the rotor 12 is rotated. 1
2 can be pressed against the inner surface.

The inner pad 18 is supported by a support 20 so as to be movable in the axial direction of the rotor 12. As shown in FIG. 2, the support 20 is formed in a concave shape having an arrangement portion 22 on which the inner pad 18 is arranged, and is not shown via screw holes 24 provided at lower portions on both sides in the circumferential direction of the rotor. Screwed and fixed to the car body. A caliper 1 is provided at the upper end on both sides in the rotor circumferential direction of the support 20.
Slide sleeves 26 and 28 constituting a slide guide mechanism for guiding the guide 4 in the axial direction of the rotor are mounted in parallel with the rotor axis.

In this embodiment, the slide sleeve 28 on the right side of FIG. 1 is the main side receiving braking torque, and the slide sleeve 26 on the sub side is
It is attached to the support 20 via a rubber bush 30. A sub guide pin 34 and a main guide pin 36, which are screwed to arm portions 32 provided on both sides of the caliper 14 in the rotor circumferential direction, are slidably inserted into the slide sleeves 26, 28. The caliper 14 is slidably guided in the rotor axial direction by slide sleeves 26 and 28 via guide pins 34 and 36.

The upper portion of the caliper 14 on the outer side protrudes in the outer direction (see FIG. 2). Below the caliper 14, a pair of caliper claw portions 40 for supporting the outer pad 38 are provided.
Are formed so as to face the rotor surface. A mounting hole 42 is provided in each caliper claw portion 40 so as to penetrate in the rotor axial direction, and a locking pin 44 is provided in the mounting hole 42 from the inner surface side of the caliper claw portion 40 on the rotor 12 side. The shaft 46 is press-fitted. The locking pin 44 is provided with serrations on the peripheral surface of the shaft portion 46 in order to increase the pull-out resistance to prevent the locking pin 44 from coming off, and is connected to the caliper claw portion 40 by serrations. Further, the locking pin 44 is used to keep the amount of protrusion of the caliper claw portion 40 toward the inner surface side constant.
It has a head 48 with a diameter larger than 6. This head 48 is disposed on the inner surface side of the caliper claw portion 40, and the outer pad 38
Of the back metal 50 to support the outer pad 38.

The outer pad 38 includes a back metal 50 and a friction member 54 fixed to the front surface of the back metal 50. The friction member 54 has a positioning projection 56 formed on the back surface at a position corresponding to the engagement hole 52 of the back metal 50, and this projection 56 is fitted into the front end side of the engagement hole 52. Thus, the mounting position of the friction member 54 with respect to the back metal 50 can be determined.

In the embodiment configured as described above, when the outer pad 38 is mounted on the caliper claw portion 40, the shaft portion 46 of the locking pin 44 formed separately is attached to the mounting hole 42 provided in the caliper claw portion 40. And the head 48 is fitted into the engagement hole 52 of the outer pad 38 so that the outer pad 38 is supported by the caliper claw portion 40. Therefore, since the outer pad 38 does not have a projection on the back surface of the back metal 50 at the time of processing, the outer pad 38 can be easily fixed to the table when the friction member 54 is ground, and the production efficiency of the outer pad 38 can be improved. Further, the braking torque acting on the outer pad 38 is transmitted to the caliper claw 40 via the locking pin 44 fitted in the engagement hole 52 formed in the back metal 50 of the outer pad 38, Since the thickness of a portion transmitting the braking torque to the outer pad 40 is not thin, the strength of the outer pad 38 is improved.
The outer pad 38 according to the embodiment has a positioning convex portion 56 formed on the back surface of the friction member 54, and the convex portion 56 is fitted into the engaging hole 52 formed through the back metal 50. The positioning of the friction member 54 can be easily performed.

In the above-described embodiment, the case where the serration is formed on the shaft portion 46 of the locking pin 44 has been described, but the serration may not be provided.

[0016]

As described above, according to the present invention, no protrusion is formed on the back metal back surface of the outer pad, so that the outer pad can be easily fixed to the table when processing the outer pad. Production efficiency can be improved. Moreover, since the outer pad is supported by the caliper claw portion by fitting the locking pin into the engagement hole formed in the back metal, the thickness of the outer pad back metal at the portion transmitting the braking torque to the caliper does not become thin. Thus, the strength of the outer pad can be improved.

[Brief description of the drawings]

FIG. 1 is a plan view, partially cut away, of a disc brake having an outer pad support structure according to an embodiment of the present invention.

FIG. 2 is a view of the disc brake shown in FIG. 1 as viewed from an outer side.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Disc brake 12 Rotor 14 Caliper 18 Inner pad 20 Support 38 Outer pad 40 Caliper claw part 42 Mounting hole 44 Locking pin 46 Shaft part 48 Head 50 Back metal 52 Engagement hole 54 Friction member 56 Convex part

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[Procedure amendment]

[Submission date] August 22, 1996

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Fig. 1

[Correction method] Change

[Correction contents]

FIG.

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] Figure 2

[Correction method] Change

[Correction contents]

FIG. 2

Claims (1)

[Claims] 1. A rotor fixed to a vehicle body via a sliding guide mechanism comprising a guide hole and a guide pin fitted in the rotor. A caliper supported so that the inner pad is pressed against one side of the rotor by hydraulic means provided on the caliper, and the caliper claw portion is moved along with the movement of the caliper in the rotor axial direction due to the reaction force thereof. The outer pad held by the outer pad is pressed against the other side of the rotor, and a brake torque applied to the outer pad is transmitted to the support via the caliper to the support. A hole is provided at a corresponding position of the outer pad, and a locking pin formed separately is fitted into the hole so that the outer pad is An outer pad support structure for a disc brake, which is supported by a caliper claw portion.