JPH0514673U - Disc brake - Google Patents

Abstract

(57) [Summary] [Structure] The pad guide 6 supports the lower plate portion 12 supporting the lower surface of the end portion of the pad and the upper plate portion 12 at the upper surface of the end portion of the pad.
And a pressing portion 14 that supports the pressing portion 14 while pressing it toward
A board portion 16 connecting the lower plate portion 12 and the lower plate portion 12, and a restricting piece 24 extending from both ends of the pressing portion 14 toward the lower plate portion 12, and the lower plate portion 12 includes the substrate portion. A tapered notch portion 27 is provided at both end corners on the opposite side to 16. [Effect] When supporting the pad on the pad guide 6,
Since the notch portion 27 of the pad guide 6 guides the pad and smoothly rotates the pad, the work efficiency of assembling and replacing the pad can be greatly improved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a disc brake mounted on an automobile or the like.

[0002]

[Prior Art]

 Conventionally, a disc brake is pressed against a disc by holding a pad slidably supported by a pad guide in the axial direction of the disc by a piston of a caliper and a claw portion, and braking wheels by friction force thereof. It was like this.

Further, some of the pads of this type of disc brake are provided with a return spring. The return spring urges the pad away from the disc, and the return spring prevents the disc from dragging the pad when the brake is released.

Then, in the case of incorporating the pad in the disc brake having such a structure, the procedure is as follows: first, the pad is supported by the pad guide of the carrier, the return spring is attached, and then the caliper is attached. When replacing a worn pad, remove one of the pins connecting the carrier and caliper on both sides, and rotate the caliper about the other pin. , The worn pad was removed, the new pad was supported by the pad guide, the return spring was attached, and then the caliper was rotated in the opposite direction to attach the pin on one side.

Here, as shown in FIG. 9, the pad guide 50 pushes the lower plate portion 51 supporting the lower surface of the end portion of the pad and the upper surface of the end portion of the pad toward the lower plate portion 51. While supporting the pressing portions 52, a substrate portion 53 that connects the pressing portions 52 and the lower plate portion 51 and is in contact with the end surface of the pad, and a lower plate portion 51 outward from the lower plate portion 51. When the return spring is attached to the pad during the assembling and replacement work of the pad, the pad is mutually supported by the urging force of the return spring. Since it may move away from the pad guide and fall off from the pad guide, a restricting piece 55 that extends from both ends of the pressing part toward the lower plate part and restricts the movement of the pad in the axial direction of the disk is provided. Was there.

By providing the restricting piece 55, when the pad is attached to the pad guide 50, the pressing portion is laid sideways so as not to interfere with the restricting piece 55. 52 is inserted from the side between the lower plate portion 51 and the lower plate portion 51, and then rotated so that the upper surface of the end portion is supported by the pressing portion 52 and the lower surface of the end portion is supported by the lower plate portion 51. (See FIG. 8).

[0007]

[Problems to be solved by the device]

 However, in the disc brake having the above structure, a part of this pad is part of the lower plate portion of the pad guide 50 when the pad is supported by the pad guide during the above-mentioned rotation in the work of assembling and replacing the pad. The stepped portion 56 (FIG. 10) of the guide claw 54, which is the corner of the insertion side of the guide 51, may be hindered.

[0008] Therefore, an object of the present invention is to provide a disc brake capable of extremely efficiently assembling and exchanging pads.

[0009]

[Means for Solving the Problems]

 To achieve the above object, the disc brake of the present invention has a carrier fixed to a non-rotating portion of a vehicle, a pad guide provided so as to face the carrier, and a disc sandwiched between them. A pair of pads each of which is slidably supported on the pad guide by the pad guide, a caliper provided at a position straddling the carrier to press the pair of pads against the disc, and the pad The pad guide supports a lower plate portion supporting the lower surface of the pad and the upper surface of the pad while pressing the upper surface toward the lower plate portion. The pressing portion, the base plate portion that connects the pressing portion and the lower plate portion, and is in contact with the end surface of the pad, and the dice that extends from both ends of the pressing portion toward the lower plate portion. And a restriction piece for restricting the movement of the pad in the axial direction of the pad, wherein the lower plate portion of the pad guide has tapered notches at both end corners on the opposite side to the substrate portion. It is characterized in that a section is provided.

[0010]

[Action]

 According to the disc brake of the present invention, the tapered notch portion of the lower plate portion of the pad guide guides the contact portion of the pad when the pad is supported by the pad guide and smoothly rotates. Become.

[0011]

【Example】

 Hereinafter, a disk brake according to an embodiment of the present invention will be described. First, the overall structure thereof will be described with reference to FIGS. 1 and 2.

In the figure, reference numeral 1 is a disc brake. This disc brake 1 is provided with a carrier 2 fixed to a non-rotating portion of a vehicle, a caliper 3 provided in a sliding manner at a position straddling the carrier 2, and a disc 4 sandwiched by the carrier 2. It is composed of a pair of pads 5. Both pads 5 are supported by a pair of pad guides 6 provided so as to face the carrier 2 so as to be slidable in a direction orthogonal to the disc 4.

Further, the disc brake 1 is provided with a return spring 7 on the pad 5 in order to reduce drag of the pad 5 due to the disc 4. The return springs 7 are mounted by inserting both ends into locking holes formed in the back metal 9 to which the lining 8 of the pad 5 is fixed. Is urged to.

Next, as shown in FIGS. 3 to 5, the pad guide 6 includes a lower plate portion 12 that supports a lower surface 11 of the end portion 10 of the pad 5 and an upper surface 13 of the end portion 10 of the pad 5. The pressing portion 14 that presses and supports the lower plate portion 12 and the substrate portion 16 that connects the pressing portion 14 and the lower plate portion 12 and is in contact with the end surface 15 of the pad 5 and the substrate portion 16. It is mainly composed of a retaining portion 17 provided.

The board portion 16 is composed of a pair of leg portions 18 and a bridge portion 19 connecting the upper ends of the leg portions 18 to each other. The lower ends of the pair of leg portions 18 are bent in the pad 5 direction. The lower plate portion 12 is provided. In the pad guide 6, the leg portion 18 and the bridge portion 19 are brought into contact with the inner wall of the carrier 2, and the lower plate portion 12 is brought into contact with the step portion 20 formed on the carrier 2 so that the bridge portion 19 is formed. The disk 4 is supported so as to straddle the disk 4. Further, a regulation portion 21 is formed at the upper end of the substrate portion 16 so as to regulate the movement of the pad 5 outward in the radial direction of the disc 4.

The retaining portion 17 is bent from the lower end of the bridge portion 19 of the base plate portion 16 in the direction opposite to the lower plate portion 12, that is, in the direction away from the pad 5, and is a carrier for slidably connecting the caliper 3. The lower surface of the second connecting portion 22 and the inner surface of the so-called disk path portion of the carrier 2 are brought into contact with each other. The retaining portion 17 abuts on the connecting portion 22 to apply an elastic force to the connecting portion 22 to prevent the pad guide 6 from coming out of the carrier 3.

The pressing portion 14 is connected to the substrate portion 16 via the bent portion 23. The bent portion 23 is formed so as to extend upward from the upper end of the substrate portion 16 and further bent downward so as to apply a downward biasing force to the pressing portion 14. .. Further, at both ends of the pressing portion 14, regulation pieces 24 for regulating the movement of the pad 5 in the axial direction of the disc 4 are formed. These restriction pieces 24 extend from both end portions of the pressing portion 14 in a direction in which they are separated from each other in the axial direction of the disc 4, and further, a tip end portion 25 thereof is formed in a shape bent toward the lower plate portion 12. ing.

The lower plate portion 12 has guide claws 26 (a part of the lower plate portion 12) protruding outward from both ends of the side opposite to the substrate portion 16 on the plate surface of the lower plate portion 12. On the other hand, the guide claws 26 are provided so as to be slightly inclined downward, and tapered notches 27 are provided at the corners of the guide claws 26 (FIG. 6). The size of the notch 27 is, for example, as shown in FIG. 7, a guide claw that is located outside the maximum width portion (D in FIG. 7) of the lining 8 of the pad 5 when the pad 5 is attached. It suffices to set the notch generation point (E shown in FIGS. 6 and 7) on the tip end side of 26. The notch end point (F in FIG. 6) extends from the end surface 12a of the lower plate portion 12 to the disk 4 side, that is, the upper side in FIG. If the notch 27 is provided, the shape of the guide claw 26 is not limited to the above, and extends outward from the lower plate 12 so as to be flush with the plate surface of the lower plate 12, for example. It is possible to make various changes, such as making the tip end portion bent downward.

According to the disc brake 1 having the above-described configuration, when the brake pedal is depressed, the piston 28 and the locking portion 29 provided inside the caliper 3 hold the both pads 5 via the disc 4. As a result, friction is generated between the pad 5 and the disc 4, which weakens the rotation of the tire and brakes the vehicle. Then, when the holding by the piston 28 of the caliper 3 and the locking portion 29 is released by releasing the brake, the pad 5 is separated from the disc 4 by the urging force of the return spring 7 or the like. Will be moved.

Next, the work of assembling the pad 5 of the disc brake 1 of the present embodiment and the work of replacing the worn pad 5 will be described.

When assembling the pad 5 as shown in FIG. 8, first, with the back metal 9 of the pad 5 facing the pressing portion 14 of the pad guide 6 (the state shown by the broken line in FIG. 8), The pad 5 is inserted into the pad guide 6 from the side, and the back metal 9 is turned so as to face outward. By doing so, both end portions 10 of the pad 5 are pressed downward by the pressing portion 14 between the lower plate portion 12 and the pressing portion 14 of the pad guide 6, so that the lower plate portion 12 and the pressing portion 14 are pressed. The portion 14 holds the disc 4 from above and below, and supports the disc 4 so as to be slidable in the axial direction.

Then, in this state, both ends of the return spring 7 are inserted into the locking holes formed in the upper portion of the backing plate 9 of the pad 5 and locked to be mounted.

On the other hand, in the case of replacement work due to wear of the pad 5, first, one side of the pin 30 is removed, and the caliper 3 is rotated around the pin 30 on the other side.

In this state, the return spring 7 is removed, and the worn pad 5 is removed from the pad guide 6. Then, after the pad 5 is supported by the pad guide 6 as in the assembling work of the pad 5, the return spring 7 is attached to the pad 5.

In this embodiment, since the tapered notch 27 is provided in the internal claw 26 of the lower plate portion 12 of the pad guide 6 as described above, the pad assembling and replacement work is performed. In any of the above cases, the notch portion 27 guides the abutting portion of the pad 5 to smoothly rotate the pad 5, so that the pad can be efficiently brought into the above-mentioned supporting state on the pad guide 6. it can.

[0026]

[Effect of the device]

 As described in detail above, according to the disc brake of the present invention, when the pad is supported by the pad guide, the tapered notch portion of the lower plate portion of the pad guide guides the abutting portion of the pad. Since the pad can be smoothly rotated, the work efficiency of assembling and replacing the pad can be significantly improved.

[Brief description of drawings]

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

2 is a sectional view of the disc brake according to the embodiment of the present invention taken along the line AA shown in FIG.

FIG. 3 is a perspective view of a pad guide of a disc brake according to an exemplary embodiment of the present invention.

FIG. 4 is a BB shown in FIG. 1 for explaining a mounting state of a pad guide of a disc brake according to an embodiment of the present invention.
FIG.

5 is a view taken in the direction of arrows CC in FIG. 1 in which a locking portion is omitted for explaining a mounting state of a pad guide of a disc brake according to an embodiment of the present invention.

FIG. 6 is a plan view showing a guide claw of a pad guide of a disc brake according to an embodiment of the present invention.

FIG. 7 is a diagram showing a positional relationship between a pad lining and a cutout portion of a disc brake according to an embodiment of the present invention.

FIG. 8 is a front view schematically showing a procedure of attaching a pad to a pad guide of a disc brake according to an embodiment of the present invention.

FIG. 9 is a perspective view of a pad guide of a conventional disc brake.

FIG. 10 is a plan view showing a guide claw of a conventional pad brake pad guide.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 disc brake 2 carrier 3 caliper 4 disc 5 pad 6 pad guide 7 return spring 10 end 11 lower surface 12 lower plate portion 13 upper surface 14 pressing portion 15 end surface 16 substrate portion 24 restriction piece 27 notch portion

Claims (1)

[Scope of utility model registration request] 1. A carrier fixed to a non-rotating portion of a vehicle, a pad guide provided so as to face the carrier, and both end portions of the pad guide in a state where a disk is sandwiched between them. A pair of pads slidably supported, a caliper provided at a position straddling the carrier to press the pair of pads against the disc, and a return spring for urging the pad in a direction away from the disc. The pad guide supports the lower surface of the end portion of the pad, a pressing portion that supports the upper surface of the end portion of the pad while pressing the upper surface toward the lower plate portion, and the pressing portion. A base plate portion that connects the lower plate portion and the end surface of the pad contacts, and a movement of the pad in the axial direction of the disc that extends from both ends of the pressing portion toward the lower plate portion. In disc brakes and a regulating piece that, the lower plate portion of the pad guide is a disc brake, wherein a tapered notch across the corners of the opposite side is provided with respect to the substrate portion.