JPS5919729A - Disk brake - Google Patents

Abstract

PURPOSE:To strengthen the connection of metallic plates and a vibration-proof member by a method wherein the edge of the vibration-proof member is held clamped by the edges of the metallic plates whose edges are folded in the same direction. CONSTITUTION:When the pressure of a brake liquid is supplied into a cylinder 10, a piston 11 and a caliper 4 move vertically to thrust brake pads 7 and 6 against both side surfaces of a disk 18 to thereby brake the disk. The frictional heat generating at this time is released into the atmosphere from the surface of the disk 18 and transmitted to thin plates 13 and 12. The thin plates 12 and 13 reduce or prevent the generation of brake creakings as a result of deformation of the vibration-proof member 22 in the direction of the axis of the disk 18. The metallic plates 20 and 21 and the vibration- proof member 22 are bonded together in such a manner that the edge 22a of the member 22 is held clamped by the edges 20a and 21a of the metallic plates 20 and 21 whose edges are folded in the same direction. Therefore, the frictional heat is transmitted to the vibration-proof member and even when a torque in the rotational direction of the disk is applied on the member 22, it is possible to prevent the separation of the member 22 to thereby control effectively the lowering of the anti-vibration effect of the member 22.

Description

DETAILED DESCRIPTION OF THE INVENTION Conventional disc brakes include, for example, those shown in FIG. 1 (only the right half is shown because it has a symmetrical shape) and FIG. 2. That is, 1 shown in FIG. 1 is a torque member, and this torque member 1 consists of two symmetrical arm parts 2 and a trunk 3 connected to both arm parts 2. One side of the slide pin is slidably inserted.

The other side of the slide pin is fixed to the base 4a of the caliper 40, and the arm 2 of the torque member 1 is attached to the base 4a.
The piston 11 is loosely fitted into the cylinder 10, and the cylinder 10 is opened in the extending direction.

The arm portion 4b of the caliper 4 is continuous from the base portion 4a so as to straddle the disc 18, similar to the arm portion 2 of the torque member 1, and the outer brake is attached to the inside of the claw portion 4c provided at the tip of the arm portion 4b. The bat 6 is installed and the screws are still attached]
- The inner brake pad 7 is arranged in front of the engine 11. Furthermore, as shown in cross section in FIG. 2, there are spaces between the arm portion 4b of the caliper 4 and the outer brake butt 6, and between the piston 11 and the inch side brake butt 7.
A thin plate 12.13 is interposed, thereby suppressing squealing due to vibration of the brake pad 6.7 during braking.

The thin plate 12.13 includes two metal plates 20.21 and both metal plates 20.21, as shown in FIG. 3 (only the thin plate 12 for the outer brake pad 1-6 is shown) and FIG. It consists of a vibration isolating member 22 made of synthetic resin or the like interposed therebetween, and both metal plates 20, 21 and the vibration isolating member 22 are each joined by adhesive.

The brake pads 6.7 are supported by the torque member 1 via a pair of butt springs 9 so as to be slidable along the axial direction of the disc 18.

8 is a support surface of the pad splinter 9.

However, in such a thin plate for a brake pad of a conventional disc brake, the metal plate 20.21 and the vibration isolating member 22 are bonded together, and the vibration isolating member 22 is fixed between the two metal plates 20, 21. It was designed to be interposed. Then, due to the thrust force received during braking, the metal plates 20, 2? is relatively displaced in the thrust direction (the axial direction of the disk), and the resulting internal deformation of the vibration isolating member 22, and thus the viscosity, reduces the noise. By the way, when the brake pad 6.7 is brought into pressure contact with the disc 18 to generate a braking force, the disc 18 is pressed against the disc 18 due to the friction with the brake pad 6.7.
Frictional heat is generated at each brake pad 6.
1 to the thin plate 12.13. As a result, the metal plate 20.
There has been a problem in that separation occurs between the vibration isolating member 1 and the vibration isolating member 22, reducing the vibration isolating effect and making it impossible to effectively suppress brake squeal.

This invention was made by focusing on these conventional problems, and a thin plate with a vibration isolating member fixed between two metal plates is attached to the back plate on the side opposite to the friction material. A disc that obtains braking force by having multiple brake pads pressed against both sides of the disc that rotates with the wheel.
In the brake, by bending the edges of both metal plates i'lJ in the same direction, the edge of the vibration isolating member is held under pressure by the pinching force caused by plastic deformation of both edges. The purpose of this invention is to strengthen the bond between the metal plate and the vibration isolating member, thereby solving the above problem.

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

FIGS. 5 to 7 are diagrams showing an embodiment of the present invention.

First, to explain the configuration, 1 shown in FIG. 5 is a torque member, and this torque member 1 straddles a disk 18 that is fixed to a wheel (not shown) and rotates together with the wheel.
In addition, two arm portions 2 are provided at appropriate intervals in the rotational direction of the disk 18 (left and right are symmetrical, so one arm portion is omitted in the figure), and both arm portions 2 are provided on one side of the disk 18. The torque member 1 is fixed to a member on the vehicle body side, such as a knuckle, by a bolt (route in the figure) that is screwed into a screw hole provided in the trunk 3.

Each arm portion 2 of the torque member 1 is provided with a hole 2a extending parallel to the axial direction of the disk 18, and a slide bin can be slid into the hole on the opposite side of the figure through a rubber sleeve. In addition, a slider 15 is directly inserted into the hole 2a on the illustrated side so as to be slidable therein without using a rubber sleeve. and,
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.

Okay, caliper 4 arm 4b of both arms 2 of torque member 1
A support surface 8 for slidably supporting the outer brake pad 6 and the inner brake pad I is provided on the opposite side.

A pad spring 9 is placed on this support surface 8, and a pair of brake hats 6 are connected via this pad spring 9.
．． 7 is slidably supported by the torque member 1 along the axial direction of the Dinuk 18.

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 protrudes inward in the radial direction of the disk 18 is provided at the tip of the bent arm portion 4b. A piston 11 is slidably mounted on the cylinder 10, and a hydraulic chamber 14 is defined by the piston 11 and the cylinder 10, and a brake mask cylinder (not shown) is provided in the hydraulic chamber 14. A liquid port 14a (not shown) is opened.

An inch-side brake pad 7 is provided on the outside of the piston 11, and an outer-side brake pad 6 is provided on the inside of the claw portion 4C of the arm portion 4b of the caliper 4. 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 an adhesive or the like.
As shown in FIG.
A is provided for each.

Further, there are thin plates 12.1 between the claw portion 4C of the caliper 4 and the outer brake pad 6, and between the pin 11 and the inner brake pad 7.
3 is interposed. These thin plates 12 and 13 are both 2
It consists of two metal plates 20, 21 and one sheet-like vibration isolating member 22 made of synthetic resin or rubber. , only the thin plate 12 for the outer brake band 6 is shown.
The thin plate 13 for the Inona side brake butt γ, which has the same structure as the thin plate 12, is not shown. ) and as shown in an enlarged view in FIG. The edges 20a and 2ia on both sides in the lateral direction of the metal plate 20.21 are aligned at 180 degrees in the same direction.
and the bent edges 20a, 21a
The edge 22a of the vibration isolating member 22 is pinched by the clamping force due to the plastic deformation.

In addition, a plurality of protrusions 20b are provided on the upper and lower edges of the metal plate 20 on the opposite side from the brake pad 6 (edges in the radial direction of the disc 18), and these protrusions 20b are provided on the brake/ζrad 6 side. The thin plate 12 (the same applies to the thin plate 13) is attached to the brake jid 6 by bending and forming the thin plate 12 (the same applies to the thin plate 13) by the squeezing force of these protrusions 20b. Note that by setting the shape and dimensions of the edge 21a so that the claw portion 4C of the carrier (4) is attached between the end faces of the edge 21a of the metal plate 21 on the brake pad 6 side, this edge 21a allows positioning of the thin plate 12.

Next, the action will be explained.

To assemble this disc brake, first, a pair of band springs 9 are attached to the torque lever 1. Next, on both sides of the disk 18, respective friction materials 25 are applied.
toward the disk 18 side, and the ears 6a, 7a on both sides.
is inserted inside the band spring 9, and is slidably supported on the outer side brake pad (the brake pad 6 and the brake pad 7 on the side/side side by the torque knob 1).After that, both brake pads 6 and 7 are attached. While holding the caliper 4 so as to face a part of the outer periphery of the disc 18, the tip of the bolt 15 held at the base 4a of the caliper 4 was slidably inserted into the hole 2a of the arm 2 of the torque member 1 in advance. By screwing into the slide pin 5, and tightening the pins 1 and 15, the carrier/carrier (4) is fixed to the slide pin 5. Then, the torque men 1 is fixed to the vehicle body side member.

According to the disc brake assembled in this way, when brake fluid pressure is supplied from the mask cylinder (not shown) into the cylinder 10 by operating the brake pedal (not shown) during braking, the piston 11 moves toward the disc. 18 side and presses the inch-side brake pad 7 installed on the front side of the disc 18 against one side of the disc 18, and at the same time, this reaction force moves the caliper 4 in the opposite direction to the movement direction of the piston 11. Then, the outer brake pad 6 installed inside the arm portion 4b is pressed against the other side surface of the disc 18. As a result, braking force is obtained, and at this time, kinetic energy becomes frictional heat generated between the friction material 25 of both brake wheels (RAD 6.7) and the disc 18. This frictional heat is transferred from the surface of the disc 18 to the atmosphere. At the same time, it is transmitted from the inner brake pad 7 side to the thin plate 13, and on the other hand, it is transmitted from the outer brake gutter 6 side to the thin plate 12.
The vibration isolating member 22 is deformed in the axial direction of the disc 18 via the vibration damping member 21, and its viscosity reduces or prevents brake squeal.

In this case, two metal plates 2 constituting each thin plate 12.13
0.21 and the vibration isolating member 22 are bonded to each other by adhesive, and both metal plates 20.21 and 22 are bonded together as described above.
Both edges 20a are formed by bending the edges 2G&, 21a in the same direction.

The edge 2 of the vibration isolating member 22 is
2a is pinched. Therefore, the frictional heat is transmitted,
Even when torque in the disk rotation direction is applied to the metal plates 20 and 21, the edges 20a and 21 of both metal plates 20 and 21
Since the edges 22a of the vibration isolating member 22 are securely sandwiched and crimped, separation of the metal plate 20.21 and the vibration isolating member 22 can be prevented, and therefore the durability of the thin plate 12.13 is improved. (width 1c) can be improved, and the deterioration of the vibration-proofing effect can be effectively suppressed.

In this embodiment, a caliper type disc brake has been described, but it can be used not only for other floating type disc brakes such as an anesot type disc brake, but also for an onboard type disc brake. Still, the upper and lower edges of the thin plate 12.130, or
Of course, the entire circumference of the thin plate 12.degree. 130 may be formed by bending as described above.

As shown in Figures 8 and 9, the thin plate is 12°13
The edges 20a, 21a may be bent by 5]0 degrees, and by such a structure, the same effect (i) as in the embodiment described above can be obtained.

As explained above, in this invention, a plurality of brake pads each having a thin plate with a vibration isolating member fixed between two metal plates on the opposite side of the back plate from the friction material are installed together with the wheels. Braking force is obtained by press-contacting both sides of a rotating disc.In a disc brake that uses pressure contact with both sides of a rotating disc, plastic deformation of both edges is achieved by bending the edges of both metal plates that make up the thin plate in the same direction. The edges of the vibration isolating member are held under pressure by the clamping force. Therefore, as the edge of the metal plate is bent, the connection between the outer plate and the vibration isolator can be strengthened. Therefore, even when frictional heat is generated due to friction between the brake pad and the disc, or when braking torque is applied to the metal plate in the direction of rotation of the disc, the gap between the metal plate and the vibration isolation system is The peeling of the thin plate can be prevented, and the durability of this thin plate can be greatly improved. Therefore, the function of the thin plate used for preventing the transmission of vibration can be fully demonstrated, and brake squeal can be effectively suppressed.

Furthermore, since the bent portions are formed on the edges of both metals, the flatness of the thin plate, in other words, the thickness of the vibration isolating member can be made uniform, and the vibration isolating effect can be reliably enhanced.

Furthermore, when the bent portion is engaged with the brake body (for example, a caliper or a screw) 7, the thin plate can be positioned.

[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 cross-sectional view of the disc brake, Fig. 3 is a perspective view showing a thin plate for the brake pad, and Fig. 4 is the IV-IV of Fig. 3. FIG. 5 is a plan sectional view showing one embodiment of the present invention; FIG. 6 is a perspective view showing the thin plate for the brake pad;
FIG. 7 is an enlarged sectional view taken along the line ■-■ in FIG. 6, and FIG. 8 is a perspective view of a thin plate for a brake pad showing another embodiment of the present invention.
FIG. 9 is a sectional view taken along the line IX-IX in FIG. 8. 1... Torque member, 4... Caliper, 4a...
Base, 4b... Arm part, 4c... Claw part, 6... Outer side brake pad, 7... Inner side brake pad, 10... Cylinder, 11... Piston, 1, 2
．． 13... thin plate, 18... disk, 20.21.
...Metal plate, 20a. 21a...Edge, 20b...Protrusion, 22...Vibration isolating member, 22a...Edge FIG. 3, FIG. 4

Claims (2)

[Claims] (1) A thin plate with a vibration-proofing member fixed between two metal plates is pressed onto both sides of a disc that rotates with the wheels, and multiple brake pads are attached to the opposite side of the back plate from the friction material. In a disc brake that obtains braking force by bending the edges of both metal plates constituting the thin plate in the same direction, the edge of the vibration isolating member is A disc brake that is characterized by being held under pressure. (2) The disc brake according to claim 1, wherein the bent portion engages with the brake body to position the thin plate.