FRICTION MEMBER, DISC BRAKE PAD, AND AUTOMOBILE

• US 20200132143A1
• Filed: 06/14/2018
• Published: 04/30/2020
• Est. Priority Date: 06/14/2017
• Status: Active Application

• Current Assignee: Hitachi Chemical Company Limited (Resonac Holdings Corp.)
• Original Assignee: Hitachi Chemical Company Limited (Resonac Holdings Corp.)
• Inventors: UNNO, Mitsuo, TAKAHASHI, Yoshihisa, TOYODA, Hajime
• Application Number:
  US16/620,394
• Publication Number:
  US 20200132143A1
• Time in Patent Office: Days
• CPC Class Codes: C22C 32/00 Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
• CPC Class Codes: F16D 2069/001 Material of friction lining and support element of same or similar composition
• CPC Class Codes: F16D 2069/0475 comprising thermal treatment
• CPC Class Codes: F16D 2200/003 Light metals, e.g. aluminium
• CPC Class Codes: F16D 2200/0052 Carbon
• CPC Class Codes: F16D 2200/0056 Elastomers
• CPC Class Codes: F16D 2200/006 containing fibres or particles
• CPC Class Codes: F16D 65/092 for axially-engaging brakes, e.g. disc brakes
• CPC Class Codes: F16D 69/025 Compositions based on an organic binder
• CPC Class Codes: F16D 69/026 containing fibres
• CPC Class Codes: F16D 69/0408 specially adapted for plane linings

Abstract

Provided is a friction member (such as a disc brake pad) having light weight by reducing weight of a back plate and having improved durability after repeated braking. Specific examples of the friction member include a friction member having a friction material disposed on one surface of the back plate comprising a material having a lower specific gravity than that of steel, wherein heat conductivity in a thickness direction of the friction material is 0.40 W/m·K or less.

Claims

1. A friction member having a friction material disposed on one surface of a back plate comprising a material having a lower specific gravity than that of steel,

wherein heat conductivity in a thickness direction of the friction material is 0.40 W/m·

K or less.

2. The friction member according to claim 1, wherein the heat conductivity in a thickness direction of the friction material is 0.35 W/m·

K or less.

6. The friction member according to claim 1, wherein the specific gravity of the material comprised in the back plate is 5 Mg/m³ or less.

7. The friction member according to claim 1, wherein the back plate comprises at least one selected from the group consisting of (1) a fiber-reinforced resin, (2-1) an aluminum alloy, (2-2) an aluminum composite in which ceramic particles are dispersed in aluminum or an aluminum alloy, (3-1) a magnesium alloy, and (3-2) a magnesium composite in which ceramic particles are dispersed in magnesium or a magnesium alloy.

8. The friction member according to claim 7, wherein the back plate comprises (1) the fiber-reinforced resin, wherein a reinforcement fiber of the fiber-reinforced resin is a glass fiber or a carbon fiber, and a resin of the fiber-reinforced resin is a thermosetting resin.

9. The friction member according to claim 1, wherein heat conductivity in a thickness direction of the back plate is 0.4 W/m·

K or more.

14. A disc brake pad comprising the friction member according to claim 1.

15. An automobile comprising the friction member according to any claim 1.

3. A friction member having a friction material disposed through an interlayer on one surface of a back plate comprising a material having a lower specific gravity than that of steel,

wherein heat conductivity in a thickness direction of at least one of the interlayer and the friction material is 0.40 W/m·

K or less.

4. The friction member according to claim 3, wherein the heat conductivity in a thickness direction of at least one of the interlayer and the friction material is 0.35 W/m·

K or less.

5. The friction member according to claim 3, wherein a thickness of the interlayer is 1 mm or more.

10. A friction member having a friction material disposed on one surface of a back plate,

wherein the back plate comprises at least one selected from the group consisting of (1) a fiber-reinforced resin, (2-1) an aluminum alloy, (2-2) an aluminum composite in which ceramic particles are dispersed in aluminum or an aluminum alloy, (3-1) a magnesium alloy, and (3-2) a magnesium composite in which ceramic particles are dispersed in magnesium or a magnesium alloy, and

heat conductivity in a thickness direction of the friction material is 0.40 W/m·

K or less.

11. The friction member according to claim 10, wherein the heat conductivity in a thickness direction of the friction material is 0.35 W/m·

K or less.

12. A friction member having a friction material disposed through an interlayer on one surface of a back plate,

wherein the back plate comprises at least one selected from the group consisting of (1) a fiber-reinforced resin, (2-1) an aluminum alloy, (2-2) an aluminum composite in which ceramic particles are dispersed in aluminum or an aluminum alloy, (3-1) a magnesium alloy, and (3-2) a magnesium composite in which ceramic particles are dispersed in magnesium or a magnesium alloy, and

heat conductivity in a thickness direction of at least one of the interlayer and the friction material is 0.40 W/m·

K or less.

13. The friction member according to claim 12, wherein the heat conductivity in a thickness direction of at least one of the interlayer and the friction material is 0.35 W/m·

K or less.