JP2588826Y2 - Disc brake - Google Patents

Description

[Detailed description of the invention]

[0001]

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

[0002]

2. Description of the Related Art As a disc brake, as shown in FIG. 3, a carrier 2 provided on a non-rotating portion of a vehicle so as to straddle one side in a radial direction of a disc 1 and a carrier 2 facing each other. With a pair of pad retainers 3 spaced apart along the disk circumferential direction (left-right direction in FIG. 3) and the disk 1 interposed therebetween,
A pair of pads 5 slidably guided by a pad retainer 3 along a disc axial direction (up and down direction in FIG. 3) and a carrier 2 at a protrusion (not shown) projecting from an end in the disc circumferential direction. A caliper 6 which is freely supported and holds the pair of pads 5 from the opposite surface to the respective disks 1 to contact the disks 1 with both pads 5 interposed therebetween, and the respective disc circumferential directions of the pair of pads 5 And between the engaging portions 7 at both ends to be engaged with the outer side in the disk radial direction at the end in the same direction, and to bias the pads 5 in a direction away from each other. And a return spring 9 having a portion 8.

[0003]

In the conventional disc brake as described above, when the pad is engaged with the carrier, for example, the pad is supported by a pad retainer mounted on the carrier, and the return spring is moved between the pads. If the distance between both pads is unnecessarily widened due to the biasing force of the return spring when it is engaged, the return spring may come off the pad or the pad may fall off the pad retainer. was there.

Accordingly, an object of the present invention is to prevent the distance between the pads from being unnecessarily widened by the biasing force of the return spring when the return spring is engaged between the pads. An object of the present invention is to provide a disc brake that can reliably maintain engagement of a spring with a pad and also reliably maintain engagement of a pad with a pad retainer.

[0005]

In order to achieve the above object, a disc brake according to the present invention includes a carrier provided on a non-rotating portion of a vehicle so as to straddle one side in a radial direction of a disc, and a carrier provided on the carrier. A pair of pad retainers spaced apart along the disk circumferential direction so as to face each other, and with the disk interposed therebetween, the pad retainer at a protrusion protruding from an end in the disk circumferential direction, A pair of pads slidably supported by the carrier, and a pair of pads slidably supported by the carrier, the pair of pads being interposed between the respective discs from opposite surfaces, and interposed between the pads. And a caliper to be brought into contact with the disc to be engaged with the outer side in the disc radial direction of the end of the pair of pads in the same direction in the disc circumferential direction. Be those having a spring return and an urging portion for urging in a direction to separate the two pads to each other is provided between the engaging portion and the engagement portions of both ends to be,
The pad retainer is formed with a pair of tongues protruding along the disk radial direction outer side of the end of each pad in the disk circumferential direction, and the engagement portion of the biasing portion of the return spring. At the boundary portion of the pad retainer, which protrudes higher than the tongue piece of the pad retainer outward in the radial direction of the disc.

[0006]

According to the disk brake of the present invention, the engagement portions at both ends engaged with the radially outer side of the pair of pads at the same end in the disk circumferential direction in the disk circumferential direction and both engagement portions. A return spring having a biasing portion provided between the biasing portions and biasing the pads in a direction away from each other, a protrusion protruding outward in the disk radial direction at a boundary portion between the biasing portion and the engaging portion; The projection is higher than the tongue of the pad retainer, which protrudes along the radially outward side of the end of the pad in the disk circumferential direction at the disk circumferential direction. For this reason, when the return spring is engaged between the pads while the pad is supported by the pad retainer, the convex portion of the return spring can be locked inside the tongue (the other tongue side). . As a result, the biasing force of the return spring is received by the tongue of the pad retainer and does not act on the pad, so that the biasing force of the return spring does not cause the distance between the two pads to unnecessarily increase. Moreover, the tongue piece provided on the pad retainer for the above and protruding along the disk radial direction outer side of the end of the pad in the disk circumferential direction,
If a modified pad is to be worn instead of a corresponding pad, the tongue abuts against the end of the modified pad, thereby preventing engagement of the modified pad with the pad retainer.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A disc brake according to an embodiment of the present invention will be described below with reference to FIGS. In addition,
The description of the overall structure and the like of the disc brake described in the related art will be omitted, and the same parts will be denoted by the same reference numerals, and the description will be focused on the differences from the related art. Further, the description will be made based on the direction with respect to the disk assuming that the disk brake is set.

The carrier 2 (see FIG. 3) is provided with a surface (not shown) which is substantially perpendicular to the circumferential direction of the disk (the direction of arrow A shown in FIG. 1). The groove (not shown) is oriented in the disk axis direction (arrow B in FIG. 1).
Direction).

A pad retainer 12 is mounted on the surface of the carrier 2 so as to be spaced apart along the disk circumferential direction so as to face each other (not shown). The pad retainer 12 has a main plate 13 provided along the surface of the carrier 2, and the main plate 13 is formed with a concave portion 14 fitted into the groove. A spring portion 15 for biasing the pad 5 is provided on the inner side (lower side in FIG. 1) of the pad retainer 12 in the disk radial direction.

Between the pad retainer 12 and another pad retainer (not shown) opposed thereto, a pair of pads 5 arranged so as to interpose the disk 1 (see FIG. 3) therebetween when the disk brake is set. Is provided.
The pad 5 has a friction material 16 that generates a frictional force by coming into contact with the disk, and a plate-like back metal 17 having a fixed thickness to which the friction material 16 is fixed on one surface. A substrate portion 18 to which the material 16 is fixed and an outer surface 19 in the radial direction of the disk has a substantially arc shape;
And a projecting portion 4 projecting toward the pad retainer 12 from a predetermined intermediate position of the end face in the disk circumferential direction. Here, the outer surface 19 of the substrate portion 18 is substantially perpendicular to the friction material fixing surface. The pad 5 is engaged with the concave portion 14 of the pad retainer 12 at the protrusion 4 and is supported between the pad retainer 12 and the other pad retainer (not shown) so as to be slidable along the disk axis direction. . The pad 5 only needs to be guided by the pad retainer at the protruding portion 4 so as to be movable along the disk axis direction.

[0011] As shown in FIG.
The outer surface 19 in the disk radial direction at both ends in the disk circumferential direction, that is, at predetermined positions near the protruding portion 4,
An engagement hole 20 is provided substantially perpendicular to the outer surface 19 at this position. Here, the engagement hole 20 is provided substantially at the center of the back metal 17 in the width direction along the disk axis direction.
A return spring 21 is provided between the engagement holes 20 at the ends of the pads 5 on the same side in the circumferential direction of the disc, for urging the pads 5 in a direction away from each other. This return spring 21
Between the engaging portions 22 at both ends to be engaged from the distal end side, and to be substantially located in a plane perpendicular to the engaging portions 22 from the base end sides of the two engaging portions 22 and And an urging portion 23 for generating a main urging force, which is substantially V-shaped when viewed from the outer surface 19 side of the substrate portion 18.

In this embodiment, the main plate portion 13 of the pad retainer 12 projects in the direction of the other opposite pad retainer (not shown) corresponding to the engagement position of each pad 5 on the outer side in the disk radial direction. A pair of tongue pieces 24 are bent. The tongue piece 24 is formed so as to protrude with a slight gap along an end of the engaged outer surface 19 of each pad 5 on the outer side in the disk radial direction in the disk circumferential direction. Here, the plate surface of the tongue piece 24 is along the outer surface 19 of the pad 5, but the plate surface may be orthogonal to the outer surface 19. The tip of the tongue piece 24 projects a predetermined amount more toward the other pad retainer (not shown) than the engaging hole 20 of the pad 5 engaged with. Further, the distance in the disk axial direction connecting the inside positions of the tongue pieces 24 (the other tongue side) is the most distant from the engagement portions 22 of the return spring 21 when in a free state where no urging force is generated. The distance is set to be smaller than the distance between the positions by a predetermined amount. In addition, caliper 6
With the caliper 6 set (see FIG. 3), the position of the pad 5 is determined by the distance between the most distant positions of the engaging portion 22 of the return spring 21.
The tongue piece 24 is regulated so as to be smaller by a predetermined amount than the distance connecting the inside positions thereof. Here, the pad retainer 12 is formed from a single plate-like member by press molding or the like.

Further, in the present embodiment, when the biasing portion 23 of the return spring 21 is engaged with the pad 5 supported by the pad retainer 12 at the boundary between the engaging portion 22 and the disc radial direction, On the other hand, convex portions 25 projecting higher than the tongue pieces 24 of the pad retainer 12 are respectively formed to be bent. The return spring 21 is formed by bending one linear member.

According to the disk brake having such a configuration, the projecting portion 25 projecting outward in the disk radial direction is provided at the boundary portion between the urging portion 23 of the return spring 21 and the engaging portion 22.
The projection 25 is higher than the tongue piece 24 of the pad retainer 12. Therefore, when the return spring 21 is engaged between the pads 5 in a state where the pad 5 is supported by the pad retainer 12 before the caliper is attached, the two convex portions 25 of the return spring 21 (The other tongue side) (at this time, the return spring 21 generates the biasing force by the biasing portion 23 being bent). As a result, the biasing force of the return spring 21 is received by the tongue piece 24 of the pad retainer 12 and does not act on the pad 5, so that
The biasing force of the return spring 21 prevents the distance between the pads 5 from unnecessarily widening. Therefore,
The return spring 21 is prevented from coming off the pad 5 to reliably maintain their engagement, and the pad 5 is prevented from falling off from the pad retainer 12 to reliably maintain their engagement. .

In addition, the pad retainer 12
When the tongue piece 24 protruding along the radially outer side of the disk 5 at the end in the disk circumferential direction of the pad 5 is attached to the pad 5, the tongue piece 24 is not replaced with the corresponding pad 5, Since the engagement of the odd-shaped pad with the pad retainer 12 is prevented by contacting the end of the odd-shaped pad, erroneous assembly of the odd-shaped pad can be prevented. And since the tongue piece 24 has such an effect, it is not necessary to use the pad retainer 12 properly depending on the presence or absence of the return spring 21.

[0016]

As described above in detail, according to the disc brake of the present invention, when the return spring is engaged between the pads while the pad is supported by the pad retainer, the projection of the return spring is formed. Can be locked inside the tongue (the other tongue side), the biasing force of the return spring is received by the tongue of the pad retainer and does not act on the pad. With this biasing force, the distance between the two pads does not unnecessarily increase. Therefore, it is possible to prevent the return spring from coming off the pad and to reliably maintain their engagement, and to prevent the pad from falling off from the pad retainer and to reliably maintain their engagement. In addition, when the tongue provided on the pad retainer for the above purpose is used to attach a deformed pad instead of the corresponding pad, the tongue abuts on the end of the deformed pad, thereby causing the pad retainer of the deformed pad to be attached. Since the engagement with the pad is prevented, erroneous assembly of the odd-shaped pad can be prevented.

[Brief description of the drawings]

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

FIG. 2 is a cross-sectional view showing a back metal and a return spring of a pad of a disc brake according to an embodiment of the present invention;

FIG. 3 is a plan view showing the entire configuration of a conventional disc brake.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disc 2 Carrier 4 Projection part 5 Pad 6 Caliper 12 Pad retainer 21 Return spring 22 Engagement part 23 Urging part 24 Tongue piece 25 Convex part

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F16D 65/097 F16D 65/095

Claims (1)

(57) [Scope of request for utility model registration] 1. A carrier provided on a non-rotating portion of a vehicle so as to straddle one side in a radial direction of a disk, and a pair of pads arranged on the carrier and spaced apart from each other along a disk circumferential direction so as to face each other. A retainer, and a pair of pads guided by the pad retainer at a protruding portion projecting from an end in a disk circumferential direction, with the disk interposed therebetween, movably guided along the disk axial direction. , Slidably supported by the carrier, sandwiching the pair of pads from the opposite surface to each disk,
A caliper for bringing both pads into contact with a disk interposed therebetween; and an engagement portion at both ends which is engaged with the radially outer side of the pair of pads at the same end in the disk circumferential direction of the pair of pads. A return spring having a biasing portion provided between the portions and biasing both pads in a direction away from each other, wherein the pad retainer has a disk diameter at an end of each pad in a disk circumferential direction. A pair of tongues protruding along the outer side in the direction, and a tongue of the pad retainer outwardly in the disc radial direction at a boundary portion of the urging portion of the return spring with the engaging portion. A disc brake characterized by having a raised portion projecting higher.