JPH08277866A - Brake pad - Google Patents

Abstract

PURPOSE: To heighten the discharge effect of abrasion powder, water drops, and the like adhering to the pad surface by providing the pad surface with a plurarity of grooves inclined in the sliding direction of an other party material rotor from the longitudinal centerline toward both outer edges. CONSTITUTION: Fiber base material formed by combining one or two kinds or more of inorganic fiber such as glass, organic fiber such as Aramid fiber and metallic fiber such as steel, a friction conditioner such as cashew dust, a solid lubricant such as graphite, a filler such as barium sulfate, and a binder formed of thermosetting resin such as phenol resin are charged as material in a friction pad forming metal mold and thermocompressively-molded to obtain a pad. The metal mold has a plurarity of protrusions formed on the inner surface corresponding to the pad surface 2 from the longitudinal centerline to both outer edges so that a plurarity of linear grooves 1 inclined in the sliding direction A of an other-party material rotor are formed on the pad surface 2. There is thereby no adhesion of abrasion powder on the pad surface 2, so that the wear of the pad and rotor is small, and water drops and the like are discharged desirably so as to improve the stability of a brake.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brake pad used in a brake device, and in particular, it has an excellent effect of discharging abrasion powder and drainage.

[0002]

2. Description of the Related Art Conventionally, the surface of a brake pad has generally been flat. For this reason, wear powder generated during friction with the mating material rotor is likely to stagnate on the pad surface, and this wear powder adversely affects the wear of the pad and the mating material rotor, braking, noise, and the like. Also, if water drops adhere to the sliding surface of the pad or rotor, they will not be discharged and will remain on the sliding surface, and this will greatly change the braking effectiveness, making it difficult to maintain effective stability.

[0003]

DISCLOSURE OF THE INVENTION The present invention has developed a brake pad which has an excellent effect of discharging abrasion powder and water droplets in view of such a problem.

That is, the present invention is characterized in that a plurality of grooves are provided on the pad surface, each groove being inclined in the sliding direction with respect to the mating member rotor, from the approximate center line in the longitudinal direction of the pad toward both outer edges. It is a thing.

[0005]

In this way, by providing a plurality of grooves on the pad surface, which are inclined in the sliding direction of the mating member rotor, from the approximate center line in the longitudinal direction of the pad toward both outer edges, the sliding surface is slid on the sliding surface. The generated abrasion powder and water droplets attached to the sliding surface are easily discharged to the outside through these grooves. Although the depth of these grooves may be arbitrary, it is not more than the pad thickness. The wear limit of the pad is up to the groove depth.

[0006]

EXAMPLES The present invention will now be described with reference to examples.

(Example 1) A normal friction pad is made of glass,
Inorganic fibers such as carbon and ceramics, organic fibers such as aramid and acrylic, or fiber bases made by combining one or more kinds of metal fibers such as steel and brass, and cashew dust, rubber powder, metal powder, ceramic powder, etc. Friction modifiers, solid lubricants such as graphite and molybdenum disulfide, fillers such as barium sulfate and calcium carbonate, and binders made of thermosetting resin such as phenol resin as raw materials, and these are used as friction pads. It is obtained by putting it in a molding die and thermocompression molding. Here, on the inner surface corresponding to the pad surface of the molding die,
As shown in FIG. 1, a plurality of linear grooves (1) inclined in the sliding direction (A) of the mating material rotor are formed on the pad surface (2) on both sides from the approximate center line in the longitudinal direction to both outer edges. Thus, a plurality of ridges were formed, and the brake pad of the present invention shown in FIG. 1 was obtained by such a molding die.

With respect to the brake pad of the present invention and the conventional brake pad having a flat sliding surface, the water fade was measured with a full size dynamo tester and the results are shown in FIG. It can be seen from FIG. 2 that the brake pad of the present invention has a small decrease in the friction coefficient μ and has a good water fade recovery property. Further, the brake pad of the present invention had a smaller amount of wear powder adhered to the sliding surface than the conventional pad.

(Embodiment 2) As shown in FIG. 3, a plurality of curved grooves (3) are formed on the pad surface (2) and are inclined in the sliding direction (A) of the rotor from the substantially center line in the longitudinal direction toward both outer edges. 2) was formed on both sides to obtain a brake pad of the present invention. When the same test as in Example 1 was conducted on such a brake pad of the present invention and a conventional brake pad having a flat sliding surface, the brake pad of the present invention was superior to that of Example 1.

[0010]

As described above, according to the present invention, since the abrasion powder does not adhere and stay on the surface of the brake pad, the abrasion of the pad and the rotor is small, and the braking effect and the noise property are improved. Further, since water droplets and the like are efficiently discharged, there is an effect that stability of the braking effect is improved.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a diagram showing a measurement result of a friction coefficient.

FIG. 3 is a plan view showing another embodiment of the present invention.

[Explanation of symbols]

 1 Linear groove 2 Pad surface 3 Curved groove

Claims (1)

[Claims] 1. A brake pad, characterized in that a plurality of grooves are provided on the surface of the pad, each groove being inclined in the sliding direction of the mating member rotor from a substantially central line in the longitudinal direction of the pad toward both outer edges.