JPS58211032A - Disc brake - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a diffuser brake, and particularly to a thin plate attached to a back metal of a brake pad.

Conventional disc brakes include, for example, those shown in FIG. 1 (only the right half is shown because it has a symmetrical shape) to FIG. 3. That is, reference numeral 1 in the figure is a torque member, and this torque member 1 straddles a disk 18 that rotates together with the wheel, and has two arm portions 2 provided at appropriate intervals in the rotational direction of the disk 18, and a disk 18. The torque member 1 is fixed to the vehicle body side by a bolt screwed into a screw hole 3a provided in the trunk 3. Torque member 1
Each arm 2 is provided with a hole (not shown in FIG. 1) extending parallel to the axial direction of the disk 18, and these holes are provided with a hole (not shown in FIG. 1) fixed to a caliper 4, which is a movable member. No slide pin is slidably inserted.

The arm portion 4b of the caliper 4 is connected to the arm portion 2 of the torque member 1.
Similarly, it continues from the base 4a so as to straddle the disc 18, and an outer brake pad 6 is disposed inside this arm 4b, and a cylinder 1 provided on the caliper 4
An inner brake pad 7 is disposed in front of the piston 11 that is loosely fitted into the inner brake pad 7. Furthermore, between the arm portion 4b and the outer brake pad 6, and between the piston 11 and the inch side brake pad I, as shown in cross section in FIG. thin plate 1
2.13 is interposed, and this thin plate 12.13 suppresses brake squeal caused by vibration of the brake pad 6.7.

That is, the thin plate 12 on the outer brake pad 6 side,
As shown in FIGS. 2 and 3, two pawls 12a and 12b are provided at the outer end and the inner end of the disc 18 in the radial direction, respectively, so as to project toward the outer brake pad 6. The thin plate 12 is attached to the outer brake pad 6 by the squeezing force between the radially opposed pawls 12a and 12h of the disk 18. On the other hand, on the thin plate 13 on the inner brake pad γ side, as shown in FIG. By engaging these claws 13a with the holes 11a of the piston 11, the thin plate 13 is pushed against the piston 11 by the pressing force of the claws 13a.
A support surface 8 is provided on the side of both arms 2 of the torque member 1 facing the caliper 4 arm 4b, and a pad spring 9 is placed on the support surface 8. The pair of brake pads are slidably supported on the torque member 1 along the axial direction of the disc 18 via the torque member 1.

Note that both the outer brake pad 6 and the inner brake pad 7 are composed of a back plate 24 and a friction material 25, which are each fixed with an adhesive or the like.

However, in such a conventional disc brake, both the thin plate 12 on the outer brake pad 6 side and the thin plate 13 on the inner brake pad 7 side,
Claws 12a112b provided integrally on each thin plate 12.13 main body
, 13a, the thin plate 12 is attached to the outer brake pad 6, and the thin plate 13 is attached to the piston 11. Therefore, since the thin plate 13 on the inner brake pad T side is separated from the inner brake pad 7, the thin plate 13 does not follow the movement of the inner brake pad 7, and the inch side brake pad 7 and the thin plate 13 do not follow the movement of the inner brake pad 7. There is a problem in that a gap is created between the thin plate 13 and the brake squeal prevention effect, which is the original purpose of using the thin plate 13. It's a trench, each thin plate 12.13 claws 1
2a.

If the pawls 12a+12b of the thin plate 12 on the outer brake band 6 side have a large play due to variations in the shape of the pawls 12b113&, the thin plate 12 may fall off from the outer brake pad 6, or the pawl 12 may fall off during assembly.
When modifying the shapes of a l 12 b and 13 a, there was also the problem that even the main bodies of the thin plates 12 and 13 were deformed.

The present invention was made by focusing on such conventional problems, and in a disc brake that has a thin plate on the surface opposite to the friction material of the back plate, an engagement hole is provided in the thin plate, and the engagement hole is provided in the thin plate. Providing a protrusion on the back plate that is fitted and fixed in the engagement hole,
By creating a structure in which the thin plate is fixed to the back plate by tightening between the protrusion and the engagement hole, the thin plate is integrated with the plate parts and do, thereby solving the above problem. The purpose is

The present invention will be explained below based on the drawings.

FIGS. 4 to 8 are diagrams showing one embodiment of the present invention.

First, to explain the configuration, 1 shown in Figures 4 to 6.
is a torque member, and this torque member 1 is a disk 1 that is fixed to a wheel (not shown) and rotates together with the wheel.
8 and provided at appropriate intervals in the rotational direction of the disk 18 (the left and right sides are symmetrical, one arm is omitted in the figure), and on one side of the disk 18. The torque member 1 is composed of a trunk 3 that communicates with both arm parts 2, and is fixed to a member on the vehicle body side such as a knuckle by a bolt (not shown) that is screwed into a screw hole 3a provided in the trunk 3. .

Each arm 2 of the torque member 1 is provided with a hole 2a extending parallel to the axial direction of the diskette 18, and a slide pin is slidably inserted into the hole on the side not shown through a rubber sleeve. Further, a slide pin 5 is slidably inserted directly into the hole 2a on the illustrated side. Both slide pins 5 are each fixed to the caliper 4 by a bolt 15 screwed into one end in the axial direction. 16 is boots.

Further, on the inside of the disk 18 in the radial direction of both arm portions 2 of the torque member 1, a groove 2 facing a part of the outer peripheral edge of the disk 18 is provided.
Further, on the sides of both arm portions 2 facing the caliper 4 arm portion 4b, support surfaces 8 for slidably supporting the outer brake pad 6 and the seat/chair side brake pad 7 are provided. It is set up. A pad spring 9 is placed on the support surface 8, and a pair of brake pads 6.7 are supported by the torque member 1 so as to be slidable along the axial direction of the disc 18 via the pad spring 9.

The caliper 4 is connected to the torque member 1 via the slide pin 5.
a base 4a communicating with the two arms 2 of the torque member 1;
The arm part 4b straddles the disk 18 in between, and the base part 4a has a cylinder 1 that opens in the direction in which the arm part 4b extends.
0, and a claw portion 4C that projects inward in the radial direction of the disk 18 is provided at the tip of the arm portion 4b. A piston 11 is slidably mounted on the cylinder 10, and the piston 11 and the cylinder 10 define a hydraulic pressure chamber 14, and a brake mask cylinder (not shown) is provided in the hydraulic pressure chamber 14. The liquid port 14a, which is in communication with the liquid (not shown in the figure), opens.

An inner brake pad 7 is disposed on the outside of the piston 11, and an outer brake pad 6 is disposed on the inside of the claw portion 4C of the carrier arm 4b. The outer brake pad 6 and the inner brake pad 7 both consist of a back plate 24 and a friction material 25, which are each fixed with adhesive or the like.
Additionally, ear portions 5a and 7a are provided at both end portions of the back plate 24, respectively.

Further, between the claw portion 4C of the caliper 4 and the outer brake pad 6, and between the piston 11 and the inch side brake pad 7, thin plates 22 and 23 made of a thin steel plate or a rubber-coated steel plate are provided. Each is interposed. The thin plate 22 on the outer brake band 6 side is provided with two engagement holes 22a passing through the front and back surfaces, as shown in FIG. Similarly, two retaining holes 23a passing through the front and back surfaces are provided as shown in FIG. 8 and the like.

On the other hand, each back plate 24 of both brake jids 6.7 has a force protruding from the side opposite to the friction material 25 side, and the engagement hole 2
Protrusions 27 and 28 having a slightly larger diameter than those of 2a and 23a are provided, respectively. Then, these protrusions 27 and 28 are fitted into the respective engagement holes 22a and 23a of the thin plates 22 and 23 installed opposite each other, so that the protrusions 27, 27 and 23 that are fitted are connected to the engagement holes 22a and 23a.
8 and the engagement hole 23a, one of the thin plates 22 is fixed to the back plate 24 of the outer brake pad 6, and the other thin plate 23 is fixed to the inner side of the brake pad 7.
It is fixed to the back plate 24 of.

Note that the number of combinations of the protrusions 27, 28 and the engagement holes 22a, 23a may be one, but as shown in this embodiment, by providing two or more of the above combinations, to make the thin plates 22 and 23 even more solid, and
Can be securely fixed with 1 force. Further, 26 shown in FIG. 5 and the like is a seal attached to the cylinder 10 side, and the inside of this seal 26 comes into sliding contact with the outer circumferential surface of the piston 11.

27 is a boot provided between the piston 11 and the cylinder 10 to protect the sliding surfaces thereof.

Next, the action will be explained.

To assemble this disc brake, first, attach a pair of pad springs 9 to the torque springs (1).Next, on both ends of the disc 18, direct each friction material 25 toward the disc 18 III, and apply force. Then, insert the ears 5a and 7a on both sides into the inner side of the nozzle plate 1 and fix the thin plates 22 and 23 to each back plate 24 in advance. (1). Then, sandwich the two (2)"6 and 7 and make the horns 4 of the carrier 1 face a part of the outer periphery of the disk 18, and the base 4a of the carrier 4. The tip of the bolt 15 held in the bolt 15 is screwed into the slide pin 5 which has been slidably inserted into the hole 2a of the torque member (1 arm 2), and by tightening the bolt 15, the caliper 4 is attached to the slide pin 5. Fix it.And
After that, the torque member 1 is fixed to the vehicle body side member.

According to the disc brake assembled in this way, when brake fluid pressure is supplied into the hydraulic pressure chamber 14 from the mask cylinder (not shown) by operating the brake pedal (not shown) during braking, the piston 11 moves toward the disc. Inner brake pad 7 moved to the 18 side and installed in front of it
is pressed against one side of the disc 18, and at the same time, the caliper 4 moves in the opposite direction to the moving direction of the piston 11, and pushes the outer pad 6 installed inside the arm 4b against the other side of the disc 18. The attachment provides braking force.

At this time, each of the thin plates 22 and 23 is fitted with the respective engagement holes 22a and 23a into the protrusions 27 and 28 provided on each back plate 24 with an interference fit. , one thin plate 22 moves together with the outer play pad 6, and the other thin plate 23 moves together with the inch side brake pad 7.

Therefore, it is possible to prevent gaps from forming between the claw portion 4c of the arm portion 4b of the caliper 4 and the outer brake pad 6, and between the piston 11 and the inch side brake pad 7. It is possible to effectively suppress the occurrence of brake squeal, which is the original purpose of brake squeal.

Although this embodiment has been described with respect to a caliper type disc brake, the present invention can be used not only with other floating type disc brakes such as Annette type disc brakes, but also with posed disc brakes.

Further, as for the shape of the protrusions 27 and 28, various shapes other than those in the above-mentioned embodiments can be adopted, such as an elliptical cylinder, a square cylinder, and other polygonal cylinders.

As explained above, in this invention, a thin plate is provided on the surface of the back plate opposite to the friction material, and the friction material fixed to the back plate is brought into pressure contact with a disc rotating together with the wheel to obtain braking force. In such a disc brake, a retaining hole is provided in the thin plate, a protrusion is provided in the back plate that is fitted and fixed in the engaging hole, and the tightening between the protrusion and the engaging hole is performed. The structure is such that the thin plate is fixed to the back plate. For this reason,
The brake pad and the thin plate can be integrally configured, and the thin plate can be moved in accordance with the movement of the brake pad. Therefore, it is possible to prevent a gap from forming between the thin plate and the member that contacts it, and it is possible to effectively suppress brake squeal, which is the original purpose of using the thin plate. Moreover, since the thin plate is integrally fixed to the brake pad, there is no possibility that only the thin plate will de-ice during assembly.Furthermore, if the thin plate is made of rubber-coated steel plate, The effect is that it is possible to prevent the brake pad from being separated from the thin plate body due to the movement of the brake pad.

[Brief explanation of the drawing]

Fig. 1 is a front view of a conventional disc brake with one side omitted, Fig. 2 is a central vertical sectional view of the same, Fig. 3 is an exploded perspective view showing the same brake pad, thin plate, and Fig. 4 is the invention. FIG. 5 is a sectional view of the same plane, FIG. 6 is a longitudinal sectional view of the center thereof, and FIG. 7 is an exploded perspective view showing a brake pad and a thin plate according to the present invention. , FIG. 8 is an exploded perspective view of the same. 1... Torque member, 2... Arm, 3... Executive,
4... Caliper, 4a... Base, 4b... Arm,
4c...Claw portion, 5...Slide pin, 6...Outer side brake pad, inner side brake pad1.
8...Supporting surface, 9...Pad suffling, 10...
・Cylinder, 11... Piston, 18... Disc, 22.23... Thin plate, 22a, 23m... Engagement hole, 24... Back plate, 25... Friction material, 27.28・・・
・Protrusion patent applicant: Nissan Motor Co., Ltd., patent attorney Tetsuya Mori, patent attorney
Yoshiaki Fuji, Patent Attorney, Shimizu, Patent Attorney, Kajiyama, Ben Koreno, 'j-1 11.

Claims (1)

[Claims] A disc brake is provided with a thin plate on the opposite side of the friction material of the back plate, and the friction material fixed to the back plate is brought into pressure contact with a disc that rotates together with the wheel to obtain braking force. A mating hole is provided, a protrusion is provided on the back plate to be fitted and fixed into the engagement hole, and the thin plate is fixed to the back plate by tightening between the protrusion and the engagement hole. A disc brake featuring