JP2602623Y2 - Pad for large 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 an improvement of a brake pad incorporated in, for example, a braking device of a high-speed railway vehicle.

[0002]

2. Description of the Related Art For example, a braking device for a high-speed railway vehicle such as a bullet train is constituted by a disk brake device such as a motor vehicle having a large disk brake. Also in the case of such a large-sized disk brake device, at the time of braking, the disk rotor rotating together with the axle is strongly sandwiched from both axial sides by a pair of brake pads. Each brake pad is formed by attaching a lining made of a friction material such as sintered metal to one side of a flat back metal having sufficient rigidity. At the time of the braking, a required braking force is obtained based on the friction between the lining and both side surfaces of the disk rotor.

A brake pad incorporated in a braking device for a railway vehicle is much larger than a brake pad incorporated in an automobile disc brake, and the area of the lining is large. Therefore, it is difficult to integrally form the lining that constitutes one brake pad, unlike the brake pad of an automobile disc brake. For this reason, conventionally, as described in, for example, JP-A-60-15323, one brake pad is constituted by attaching a plurality of linings to one surface of one back metal.

[0004] Figs. 10 to 13 show the structure thus produced.
1 shows an example of a conventional brake pad. A plurality of linings 2a, 2b are attached to the surface of the back metal 1 (the surface facing one surface of the disk rotor when assembled to the braking device) with a rivet or an adhesive. Each of these linings 2a and 2b is formed in a quadrangle.

[0005]

However, in the case of the conventional brake pad 5 which is constructed as described above and is used in a state of being incorporated in the braking device, the linings 2a, 2a
Due to the shape and size of b, the following inconveniences occur.

[0006] Since the corners of the linings 2a and 2b are angular, the corners may be missing due to a brake torque generated by braking after the linings 2a and 2b are assembled to the braking device.

In order to efficiently attach the substantially square linings 2 a and 2 b to one surface of the back metal 1, the area of each of the linings 2 a and 2 b is large.
Therefore, when the linings 2a and 2b and the side surfaces of the disk rotor rub against each other during braking, the temperatures of the linings 2a and 2b tend to be non-uniform. When the temperature becomes non-uniform, each lining 2a, 2
Part of b is easily lifted from the back metal 1. If a part of the linings 2a, 2b rises from the backing metal 1, the contact state between the linings 2a, 2b and the side surfaces of the disk rotor becomes uneven, which causes a reduction in braking force.

The present invention has been devised in order to obtain a high-quality brake pad which can prevent the above-mentioned problems from occurring.

[0009]

Means for Solving the Problems] large-sized disk Bed <br/> rake pad of the present invention is substantially triangular plural disc-shaped lining
To form a segment.
In this configuration, a plurality of sheets are arranged and attached to a back metal.

[0010]

In the brake pad of the present invention configured as described above, since a plurality of linings are formed in a disk shape, there is no corner portion in each lining, and each lining is not easily chipped.

The disc-shaped lining has no direction,
For example, the mounting direction is not restricted, and the assembling property to the back metal is good. Even if the number of linings constituting one brake pad is increased, the manufacture of the brake pad is not particularly troublesome. Therefore, the area of each lining can be reduced.
As a result, the temperature of each lining does not become uneven,
Floating due to thermal distortion can be prevented.

[0012]

1 to 6 show a first embodiment of the present invention. A plurality of (five in the illustrated example) segments 8, 8 are provided on one surface of the back metal 1a made of a thick steel plate and having sufficient rigidity. It is fixed by rivets 9 and 9. Each of the segments 8 is provided with a plurality (three in the illustrated example) of linings 2c on one side of a mounting plate 10 made of a thin steel plate.
2c. Therefore, in the case of the first embodiment,
Linings 2c, 2c, each made of a friction material such as sintered metal, are attached to one surface of the back metal 1a via mounting plates 10, 10.

The linings 2c and 2c are respectively
It is formed in a disk shape by a friction material such as sintered metal. Circular recesses 11, 11 are formed in the center of the back surface (right surface in FIGS. 5 and 6) of each lining 2c, 2c. On the other hand, each of the mounting plates 10, 1 opposed to these recesses 11, 11
0 (the left side in FIGS. 5 and 6), the circular convex portions 12, 1
2 are formed in plurals (three in the illustrated example). The above linings 2c, 2c are respectively
The concave portions 11 and 11 and the convex portions 12 and 12 are bonded to the mounting plates 10 and 10 in a state where they are fitted without looseness,
The above segments 8 and 8 are constituted.

The mounting plates 10 and 10 are respectively
It has a shape with the corners of an equilateral triangle dropped. In addition, a total of four small circular holes 13 are formed in the corners of each of the mounting plates 10 and 10 and in the center of one side. When each of the segments 8, 8 is fixedly connected to the back metal 1a, the rivets 9, 9 are inserted into the back metal 1a from these four small circular holes 13, 13, and the rivets 9, 9 are formed. Crimp the tip.

A support bracket 3 is fixed to the back surface of the back metal 1a by a plurality of locking pins 4,4.
As shown in FIG. 3, at both ends in the length direction (the left-right direction in FIGS. 1 and 2) of the support bracket 3, the width of the base end near the back surface is small, and the width increases as the distance from the back surface increases. In the direction, both edges in the width direction are inclined.

The thus constructed brake pad 5a of the present invention engages both ends in the longitudinal direction of the support bracket 3 with locking grooves (not shown) provided on the caliper. Further, anchor pins (not shown) supported by the caliper are engaged with U-shaped cutouts 6 provided at both ends of the support bracket 3.

At the time of braking, the brake pad 5a is pressed against the side surface of the disk rotor by pushing a piston built in the caliper, and the linings 2c,
Braking is performed based on the friction between 2c and the side surface of the disk rotor. Based on this friction, the brake pad 5
The force (brake torque) applied to a is supported by any of the anchor pins (rear side in the rotation direction of the disk rotor).

When braking, the linings 2c, 2c
A force in the shear direction is applied between the contact surfaces between the back surface of the mounting plate 10 and the surfaces of the mounting plates 10 and 10 based on the friction.
This force is supported not only by the adhesive force of the adhesive existing between the contact surfaces but also by a mechanical engagement force based on the fitting of the concave portions 11 and the convex portions 12 and 12. Therefore, the linings 2c, 2c do not shift with respect to the mounting plates 10, 10 due to braking.

In the case of the brake pad of the present invention,
Since the plurality of linings 2c, 2c are each formed in a disk shape, there is no corner in each lining 2c, 2c, and each lining 2c, 2c is hard to chip.

Further, the disc-shaped linings 2c, 2c have no directionality, and the assembling direction is not restricted. Therefore, a plurality of linings 2c, 2c are respectively attached to the mounting plate 10,
The operation of attaching the segments 8 to the segments 8 and 8 is simple and easy to automate. Further, the operation of connecting the segments 8 and 8 to the back metal 1a to form the brake pad 5a can be easily performed without particularly troublesome operation.

Therefore, even if the number of linings 2c and 2c constituting one brake pad 5a increases, the manufacture of the brake pad 5a does not become particularly troublesome. Therefore, the area of each lining 2c, 2c can be reduced. As a result, the temperatures of the linings 2c, 2c do not become uneven even by friction with the disk rotor side surface during braking, and it is possible to prevent the lining from rising due to thermal distortion.

In addition, the temperature distribution of the linings 2c and 2c becomes uniform, and the surface of each lining 2c and 2c and the side surface of the disk rotor can be prevented from being lifted up. The frictional state of the contact portion becomes uniform over the entire surface of the contact portion. As a result, FIG.
The braking force is more stable than the thirteenth conventional structure.

FIG. 7 shows a second embodiment of the present invention designed to more reliably prevent the lining 2c from being displaced from the mounting plate 10 due to frictional force during braking. . In the case of this embodiment, not only the concave portion 11 and the convex portion 12 are fitted at the center of the lining 2c, but also the annular or missing annular convex portion 14 formed on the mounting plate 10 and the lining 2c. Is fitted to the outer peripheral edge.

FIGS. 8 and 9 show a third to a fourth embodiment of the present invention in which the lining 2c and the mounting plate 10 are connected and fixed by welding. First, in the case of the third embodiment shown in FIG. 8, when forming the lining 2c by sintering, the reinforcing plate 15 is integrally connected to the lining 2c. The reinforcing plate 15 is formed in a round bowl shape in which the diameter of the opening is smaller than the diameter of the back. Therefore, the molded lining 2c does not separate from the reinforcing plate 15. In the case of the present embodiment, the reinforcing plate 15 integrally joined to the lining 2c is attached to the mounting plate 10 as described above.
Is fixed by welding. In the case of the fourth embodiment shown in FIG. 9, the lining 2c made of sintered metal is directly attached to the mounting plate 1.
0 is fixed by welding.

In the third to fourth embodiments shown in FIGS. 8 and 9, after the lining 2c is welded to the mounting plate 10,
It is in such binding by rivets to the mounting plate 10 backing metal 1a (see FIG. 1-3).

[0026]

Large disk pad brake of the present invention, according to the invention] Since the action is configured as mentioned above, when incorporated into the braking device, lining and rows based on the thermal strain
The contact with the rotor does not become uneven, so that a large braking force can be obtained, the production is easy, and there is no missing lining.
Ku, obtained the reliability and durability is excellent braking system.
In addition, we make brake pad with difference of size even in large size
Use segments of the same shape, same size, same structure,
You can easily make each pad by changing the number.
Can be.

[Brief description of the drawings]

FIG. 1 is a front view of a brake pad showing a first embodiment of the present invention.

FIG. 2 is a view as seen from above in FIG. 1;

FIG. 3 is a view seen from the right side of FIG. 1;

FIG. 4 is a front view showing one segment taken out.

FIG. 5 is a view seen from the right side of FIG. 4;

FIG. 6 is a sectional view taken along line AA of FIG. 4;

FIG. 7 is a partial cross-sectional view of a segment showing a second embodiment of the present invention.

FIG. 8 is a partial sectional view of a segment showing the third embodiment.

FIG. 9 is a partial sectional view of a segment showing the fourth embodiment.

FIG. 10 is a front view showing an example of a conventional brake pad.

FIG. 11 is a rear view of the same.

FIG. 12 is a sectional view taken along line BB of FIG. 11;

FIG. 13 is a sectional view taken along the line CC in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1a Back metal 2a, 2b, 2c Lining 3 Support bracket 4 Locking pin 5, 5a Brake pad 6 Notch 8 Segment 9 Rivet 10 Mounting plate 11 Concave part 12 Convex part 13 Small circular hole 14 Convex part 15 Reinforcement plate

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-48-22876 (JP, A) JP-A-58-177635 (JP, U) JP-A-55-36741 (JP, U) 3910 (JP, Y1) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16D 65/092 F16D 69/00

Claims (2)

(57) [Scope of request for utility model registration] 1. A large disc brake pad comprising a plurality of disc-shaped linings connected to a substantially triangular mounting plate to form a segment, and a plurality of such segments arranged and attached to a back metal. 2. The pad for a large-size disc brake according to claim 1, wherein an uneven engaging portion is provided at a contact portion between each lining and the mounting plate.