JPS5919730A - Disk brake - Google Patents

Abstract

PURPOSE:To strengthen the connection of two metallic plates and a vibration- proof member by a method wherein projections are formed on both of the metallic plates, respectively, by bending the parts of the plates other than the edges thereof are bent in the same direction. CONSTITUTION:When the pressure of a brake liquid is supplied into a cylinder 10, a piston 11 thrusts a brake pad 7 against one side surface of a disk 18 and a caliper 4 thrusts a brake pad 6 against the other side surface of the disk 18, to thereby obtain a braking power. The frictional heat generating at this time is released into the atmosphere and at the same time, transmitted to thin plates 13 and 12. The thin plates 12 and 13 reduce or prevent the generation of creaks due to the deformation of the vibration-proof member 22 in the direction of the axis of the disk 18. The two sheets of metallic plates 20 and 21 which constitute the thin plates 12 and 13 are bonded together and the parts of the plates 20 and 21 other than the edges thereof are bent in the same direction to thereby clamp under pressure a part of the vibration-proof member 22. As a consequence, the separation of the vibration-proof member 22 is prevented and the lowering of the anti-vibration effect of the member 22 is controlled effectively.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a thin plate attached to the back side J of a brake pad of a disc brake.

Examples of conventional disc brakes include those shown in FIG. 1 (only the right half is shown because it has a symmetrical shape) and FIG. 2. In other words, 1 shown in FIG. 1 is a torque member, and this torque member 1 consists of two symmetrical arm parts 2, a trunk 3 connected to both arm parts 2, and each arm part. One side of the slide pin is slidably inserted into 2.

The other side of the slide pin is fixed to the base 4a of the caliper 4, and the arm 2 of the torque member 1 is attached to the base 4a.
The piston 11 has a cylinder 10 that is open in the direction in which it extends, and a piston 11 is loosely fitted into the cylinder 10.

The arm portion 4b of the caliper 4 extends continuously from the base portion 4a so as to straddle the disk 18 in the same manner as the arm portion 2 of the torque member 1. A brake pad 6 is provided, and an inner brake pad 7 is also provided in front of the piston 11. Furthermore, there is a gap between the arm portion 4b of the caliper 4 and the outer brake pad 6, between the piston 11 and the inner brake pad 7, as shown in cross section in FIG. Auxiliary plates 12.13 are interposed, thereby suppressing squealing due to vibration of the brake pads 6.7 during braking.

As shown in Figure 3 (only the thin plate 12 for the outer brake pad 6 is shown) and Figure 4, the thin plates 12 and 13 are composed of two metal plates 20 and 21, both metal plates, and the plates 20 and 20. The metal plates 20, 21 and the vibration isolator 22 are each bonded by adhesive.

The brake pad 6.7 is slidably supported by the torque member 1 via a pair of butt springs 9 in the axial direction of the disc 18.

8 is a support surface of the pad spring 9.

However, in the case of a thin plate for brake bar〉°1゛ of such a conventional disc brake, metal-like 20.21゛
and the vibration isolating member 22, and the two metal oscillators 20, 2 are bonded together.
The structure was such that a vibration isolating member 22 was fixedly interposed between the two. The thrust force received during braking causes the metal plate 20 to
．． 21 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 pads 6 and 7 are brought into pressure contact with the disc 18 to generate braking force, frictional heat is generated in the disc 18 due to friction with the brake pads 6 and 7, and this frictional heat is transferred to each brake pad. 6.7 to the thin plate 12°16.As a result, the metal plate 20.21 and the vibration isolation member There has been a problem that separation occurs between the brake pad and the brake pad, reducing the anti-vibration effect and making it impossible to effectively suppress brake squeal. In a disc brake that obtains braking force by press-contacting a plurality of brake pads to both sides of a disc that rotates together with the wheel, a part of the parts other than the edges of both metal plates are bent in the same direction. By providing a protruding portion, at least a portion of the vibration isolating member is held under pressure by the clamping force caused by plastic deformation of both metal plates at the bent portion of the protruding portion, and the metal plate and the vibration isolating member are The purpose of this invention is to strengthen the bond between the two, thereby solving the above problem.

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

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

First, to explain the configuration, reference numeral 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. C Two arm parts 2 provided at an appropriate interval V (left and right are symmetrical, so the arm part on one side is omitted in the figure), and a trunk 6 connected to both arm parts 2 on one side of the disk 18. The torque member 1 is fixed to a part of the vehicle body such as a knuckle by a bolt (not shown) that is screwed into a screw hole provided in the trunk 6.

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 (d) on the side not shown through a rubber sleeve. In addition, a slide bin 5 is directly inserted into the hole 2a on the illustrated side so that it can be slid directly without using a rubber sleeve.The slide bins 5 are inserted in the axial direction One end of ('r
They are each fixed to the caliper 4 by bolts 15 that are screwed together. 16 is boots.

Caliper 4 arms 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 7 is provided on the opposite side.

A pad spring 9 is placed on this support surface 8, and a pair of brake pads 6 are connected via this pad spring 9.
．． 7 is slidably supported by the torque member 1 along the axial direction of the disk 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.
02, and the tip of the arm portion 4b is provided with a claw portion 4c that projects inward in the radial direction of the disk 18. A piston 11 is slidably attached to the cylinder 10, and the piston 11 and the cylinder 10 define a hydraulic chamber 14, and the hydraulic chamber 14 includes:
A liquid port 14a that communicates with a brake mask/cylinder (not shown) opens.

An inch-side brake pad 7 is disposed outside the piston 11, and an outer brake pad 6 is disposed inside the claw portion 4C of the arm portion 4b of the caliper 4. Both the outer brake pad 6 and the inner brake pad 7 consist of a back plate 24 and a friction material 25, which are fixed with adhesive or the like, and the back plate 24 is still attached as shown in FIG. Ears 6a, 7a at both ends
are provided for each.

Furthermore, thin plates 12 and 13 are provided between the claw portion 4C of the caliper 4 and the outer brake pad 6, and between the piston 11 and the inch brake pad 7, respectively.
is interposed. Both of these thin plates 12.13 are made up of two metal plates 20.21 and one sort-shaped vibration isolating member 22 made of synthetic resin or rubber. The oscillating member 22 is the one shown in FIG. As shown in an enlarged view in FIG.
A protruding portion is provided by curving the bent portion 26, and the protruding portion 20a of the vibration isolating portion 22 is compressed by the squeezing force due to plastic deformation of the protruding portions 20a and 21a of both metal plates 20° 21 at this bent portion 26.
, 21a, the vibration isolating member 22 is sandwiched between the amphibious shoulder plate 20.21 and the protrusions 20a and 21a.
The protrusion 22a is crimped.

Both bent portions 26 of the thin plate 12 (or 16) are set so that they can be hooked on the inside of the claw portion 4C of the caliper 4, and the thin plate 12 (or thin plate 13) is also bent by the squeezing force of these bent portions 26. ) is attached to the caliper 4 to position the thin plate 12 (or 16). As shown in FIG. 3, a plurality of protrusions are provided on the upper edge and edge of the metal plate 20 on the side opposite to the brake pad 6, and the clamping force of these protrusions causes the thin plate 12 to be compressed into the brake band. It may be configured to be attached to Party B. In this case, the bent portion 26 does not have to engage with the claw portion.

As shown in FIG. 8, the bent portion 26 may be bent in a direction away from each other from the central portion of the thin plate 12 to both Oi1 to form a protruding portion. Of course it's a good thing.

At the end, we will explain the effect.

To assemble this disc brake, a pair of pad springs 9 are attached to the torque member 1 without any interruption. Then,
180 discs (hold each friction material 2
5 toward the disk 18 side, and ear portions 6a on both sides,
7a into the pad spring 9 (1111),
An outer brake pad 6 and an inner brake pad 7 are slidably supported on the torque member 1. After doing so, the caliper 4 is placed in front of a part of the outer periphery of the disc 18 while holding both brake pads 6.7, and the tip of the bolt 15 held on the base 4a of the caliper 40 is attached in advance to the torque member 1 arm. The caliper 4 is screwed onto the slide pin 5 slidably inserted into the hole 2a of the section 2, and the caliper 4 is fixed to the slide pin 5 by tightening the bolt 15. Then, the torque member 1 is fixed to the vehicle body side member.

With the 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 l/n 11 is disk 18
The brake pad 7 installed on the front side of the disc 18 is pushed to one side of the disc 18, and at the same time, due to the reaction force of 4 moves to push the outer brake pad 6 installed inside the arm portion 4b toward the other side of the disc 18. As a result, braking force is obtained, and the kinetic energy at this time becomes frictional heat generated between the friction material 25 of both brake pads 6.7 and the disc 18.

This frictional heat is released from the surface of the disc 18 into the atmosphere at τ, and on the other hand, the inner brake pad 71
It is transmitted from the eye to the thin plate 13, and on the other hand, it is transmitted from the outer gray pad 6 side to the thin plate 12. Thin plate 12.13
The vibration isolating member 22 deforms in the axial direction of the disc 18 via the metal plates 20 and 21, thereby reducing or preventing brake squeal.

In this case, two metal plates 2 constituting each thin plate 12.13
0, 2j and the vibration isolating member 22, as described above, are bonded to each other by adhesive, and both metal plates 20.
21, both metal plates 2 at this bent portion 26 are bent in the same direction.
With a clamping force due to plastic deformation of 0.21, the vibration isolating member 22
A part of it is compressed. However, even when the frictional heat is transmitted and a force in the disk rotation direction is applied to the metal plate 20.21, the protrusions 20a, 21 of both metal plates 20.21
Since the protrusion 22a of the vibration isolating member 22 is securely sandwiched and crimped, separation of the metal plate 20.21 and the vibration isolating member A22 can be prevented, and the durability of this thin plate 12. can be significantly improved, and at the same time, it is possible to effectively prevent the deterioration of the vibration damping effect.

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 Annette type disc brakes, but also for posed disc brakes.

9 to 14 show other embodiments of the invention.

In the embodiment shown in FIGS. 9(5) and 9(B), the bent portion 23 as a protrusion is formed into an annular shape, and the bent portion 23 is engaged between both claw portions 4c. , thin plate 1
2 is attached to the caliper 4 side.

In the embodiment shown in FIGS. 10(5) and 10(B), a bent portion 26 as an annular protrusion is set at a position in contact with the claw portion 4c, and this bent portion 26 is fitted. A stopper 26 is provided on the claw portion 4c, and the bent portion 23? The stopper 26 is configured so that the thin plate 12 can be positioned and fixed on the caliper 4 side by fitting the stopper 26.

In the embodiment shown in FIGS. 11(5) and 11(B), the entire portion of the thin plate 12 located between both claw portions 4c is bulged to form a protrusion, and the bulge portion is By lowering 23a between both pawl portions 40, the thin plate 12 can be positioned and fixed on the caliper 4 side.

In the embodiment shown in FIG. 12(5), 03), the bent portion 26 as a protruding portion is formed in the shape of a bank along the inner peripheral edge of the claw portion 4c.

Furthermore, the embodiment shown in FIG.
The bent portion 26 is provided at a position where it contacts the claw portion 4c, and the bent portion 26 is fitted into the hole 4d provided in the claw portion 4c (thereby, the thin plate 12 is fixed to the caliper 4 side). / It's an abduction.

Furthermore, the embodiment shown in FIG. 14 shows another example of the thin plate 16 for the inch side brake pad 7,
The thin plate 16 is provided with a bent portion 26 as an annular protruding portion, and the bent portion 2 is inserted into the hole 1 of the pin 1 and pin 11.
By fitting 1alIζ, the thin plate 16 is connected to the piston 1.
It is fixed at 1 and is 2 poor.

As described above, the same effects as in the above embodiments can be obtained by configuring the thin plates 12, 13 as in each of the embodiments shown in FIGS. 9 to 14.

As explained above, in this invention, a plurality of brake pads are provided with a thin plate having vibration isolators A and L fixed between two metal plates on the opposite side of the back plate from the friction material. In the disc brake, in which braking force is obtained by press-contacting both surfaces of a disc that rotates together with the wheel, parts of both metal plates constituting the thin plate, other than the edges, are moved in the same direction as each other. By bending and providing a protrusion, at least a portion of the vibration isolating member is held under pressure by the clamping force generated by plastic deformation of both metal plates at the bent portion of the protrusion. Therefore, by providing the bent portion in the thin plate 1, the connection between the outer plate and the vibration isolating member can be made strong. Therefore, even if frictional heat is generated due to friction between the brake butt and the disc, or if braking torque is applied to the metal plate in the direction of rotation of the disc, separation between the external QL plate and the vibration isolating member will be prevented. The effect of this is that the durability of this thin plate can be greatly improved, the function of the thin plate used to prevent vibration transmission can be fully demonstrated, and brake squeal can be effectively suppressed. is obtained.

However, since the protruding parts are provided on parts other than the edges of both metal plates, it is easy to form the protruding parts to match the shape of the disc brake body, for example, the caliper or piston, so that the protruding parts can be engaged with the disc brake body. This allows the thin plate to be positioned reliably.

[Brief explanation of drawings]

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 same as shown in Fig. 3. FIG. 5 is a plan sectional view showing one embodiment of Genmei, and 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 ■-M1 in Fig. 6, Fig. 8 is a front view showing a second embodiment of the thin plate for brake pads according to the present invention, and Fig. 9 (5) is an enlarged sectional view of the same thin plate. A front view showing the third embodiment, Fig. 9 () 3) is an enlarged sectional view taken along the line ■-IX of the same figure, and Fig. 10 (A) is a front view showing the fourth embodiment of the same thin plate. , FIG. 10(B) is an enlarged sectional view taken along line X-X of the hole in the same figure,
Figure 11 is a front view showing the fifth embodiment of the same thin plate;
Figure 1 (B) is an enlarged sectional view taken along the line XI-XI of Figure 1 (B), Figure 12 is a front view showing the sixth embodiment of the same thin plate, and Figure 12 is a front view showing the sixth embodiment of the same thin plate.
Figure (I3) is an enlarged cross-sectional view taken along the cutting-Xll line in Figure (5), Figure 13 (5) is a front view showing a seventh embodiment of the same thin plate, and Figure 13 (B) is the same figure (I3). 14 is a diagram showing an eighth embodiment of the same thin plate. 1. Torque member, 4 caliper, 4a...base,
4b...Arm part, 4C...Claw part, 6. Auk side brake pad, 7. Inch side brake pad, 10...
11...Piston, 12.13...Thin plate, 18.Disc, 20.21...Metal plate, 20a. 21a.Protrusion, 22..Vibration isolation member, 22a.Protrusion, 2
3. Bent portion patent applicant Nissan Motor Co., Ltd. agent Patent attorney Tetsuya Mori Patent attorney Yoshiaki Naito

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 metal plates forming the thin plate, a portion of the metal plates other than the edges is bent in the same direction to form a protrusion, thereby reducing the protrusion. A disc brake characterized in that at least a portion of the vibration isolating member is held under pressure by a pinching force caused by plastic deformation of both metal plates at the bent portions of the disc brake. (2) The disc brake according to claim 1, wherein the bent portion engages with the brake body to position the thin plate.