Disk brake and brake shoe set for a disk brake

• US 6,481,544 B2
• Filed: 10/21/1999
• Issued: 11/19/2002
• Est. Priority Date: 04/24/1997
• Status: Expired due to Term

• Current Assignee: TMD Friction GmbH (Nisshinbo Holdings Incorporated)
• Original Assignee: TMD Friction GmbH (Nisshinbo Holdings Incorporated)
• Inventors: Oehl, Karl-Heinz, Brecht, Joerg-Dieter
• Primary Examiner(s): Schwartz, Christopher P.
• Assistant Examiner(s): KING, BRADLEY T
• Application Number:
  US09/403,416
• Publication Number:
  US 20020000349A1
• Time in Patent Office: 1,125 Days
• Field of Search: 188/250.B, 188/250.E, 188/250.G, 188/73.1, 188/73.37
• US Class Current: 188/250.00E
• CPC Class Codes: F16D 2069/004 Profiled friction surfaces, e.g. grooves, dimples
• CPC Class Codes: F16D 65/0006 Noise or vibration control
• CPC Class Codes: F16D 65/092 for axially-engaging brakes, e.g. disc brakes

Abstract

A disk brake and brake pad set that includes a brake disk (2) and two brake pads (4, 6) wherein each brake pad (4, 6) has a carrier plate (8) and a friction lining layer (10, 12) arranged on the carrier plate (8). Each friction lining layer (10, 12) has a central area (22) of identical layer thickness,an area (14, 16; 18, 20) of reduced layer thickness at at least one end of the brake pad (4, 6),and a separating line (24) that defines an edge between the central area (22) and the at least one area (14, 16; 18, 20) of reduced layer thickness. When the two brake pads (4, 6) are arranged opposite each other on either side of the brake disk (2) the areas (14, 16; 18, 20) of reduced layer thickness of the friction lining layers (10, 12) are tangential to the brake disk (2) and the areas (14, 16; 18, 20) of reduced layer thickness of the friction lining layers (10, 12) and the separating lines (24) are arranged asymmetrically relative to each other.

Claims

1. A disk brake comprising a brake disk (2) and two brake pads (4, 6), each brake pad (4, 6) including a carrier plate (8) and a friction lining layer (10, 12) arranged thereupon, each friction layer (10, 12) including a radial symmetrically bisecting line (28);

each friction layer (10, 12) having a central area (22) of a substantially uniform layer thickness and an outer friction surface and an area (14, 16;

18, 20) of reduced layer thickness at at least one end of the brake pad (4, 6) with the reduced thickness layer area having an outer friction surface;

a separating line (24) defining an edge (24) between the central area (22) and the at least one reduced thickness layer area (14, 16;

18, 20) of each brake pad (4, 6), said separating line (24) and said radial symmetrically bisecting line (28) defining an acute included angle, said reduced thickness layer area (14, 16;

18, 20) progressively reducing in thickness in a direction away from said separating line (24), and said separating lines (24, 24) of the two brake pads (4, 6) being arranged asymmetrically in angularly offset crossing relationship relative to each other on opposite sides of said brake disk (2).

2. The disk brake as defined in claim 1 wherein each friction layer (10, 12) includes a second area (14, 16 or 18, 20) of reduced layer thickness at a second end of each brake pad (4, 6) opposite each brake pad one end, each second reduced thickness layer area having an outer friction surface, a second separating line (24) defining a second edge (24) between each central area (22) and the second reduced thickness layer area (14, 16 or 18, 20), said second separating line (24) and said radial symmetrically bisecting line (28) defining a second acute included angle, said second reduced thickness layer area (14, 16 or 18, 20) progressively reducing in thickness in a direction away from said second separating line (24), and said second separating lines (24, 24) of the two brake pads (4, 6) being arranged asymmetrically in angularly offset crossing relationship relative to each other on opposite sides of said brake disk (2).

3. The disk brake as defined in claim 1 wherein said radial symmetrically bisecting line (28) substantially bisects each central area (22).

4. The disk brake as defined in claim 1 wherein said friction lining layers (10, 12) each include a radially outermost edge and a radially innermost edge, and said separating line (24) and said radial symmetrically bisecting line (28) converge in a direction toward one of and away from another of said radially outermost and innermost edges.

5. The disk brake as defined in claim 1 wherein said included angle is in the range of substantially between 1020 to 30°

.

6. The disk brake as defined in claim 2 wherein said radially symmetrically bisecting line (28) substantially bisects each central area (22).

7. The disk brake as defined in claim 2 wherein said friction lining layers (10, 12) each include a radially outermost edge and a radially innermost edge, and said separating line (24) and said radially symmetrically bisecting line (28) converge in a direction toward one of and away from another of said radially outermost and innermost edges.

8. The disk brake as defined in claim 3 wherein said friction lining layers (10, 12) each include a radially outermost edge and a radially innermost edge, and said separating line (24) and said radially symmetrically bisecting line (28) converge in a direction toward one of and away from another of said radially outermost and innermost edges.

9. A disk brake comprising a brake disk (2) and two brake pads (4, 6), each brake pad (4, 6) including a carrier plate (8) and a friction lining layer (10, 12) arranged thereupon, each friction layer (10, 12) including a radial symmetrically bisecting line (28);

each friction layer (10, 12) having a central area (22) of a substantially uniform layer thickness and an outer friction surface and an area (14, 16;

18, 20) of reduced layer thickness at at least one end of the brake pad (4, 6) with the reduced thickness layer area having an outer friction surface;

a separating line (24) defining an edge (24) between the central area (22) and the at least one reduced thickness layer area (14, 16;

18, 20) of each brake pad (4, 6), said separating line (24) and said radial symmetrically bisecting line (28) defining an acute included angle, said reduced thickness layer area (14, 16;

18, 20) progressively reducing in thickness in a direction away from said separating line (24), said separating lines (24, 24) of the two brake pads (4, 6) being arranged asymmetrically in angularly offset crossing relationship relative to each other on opposite sides of said brake disk (2), each friction layer (10, 12) includes a second area (14, 16 or 18, 20) of reduced layer thickness at a second end of each brake pad (4, 6) opposite each brake pad one end, each second reduced thickness area having an outer friction surface, a second separating line (24) defining a second edge (24) between each central area (22) and the second reduced thickness layer area (16, 20), said second separating line (24) and said radial symmetrically bisecting line (28) being in substantially parallel relationship to each other, said second reduced thickness layer area (16, 20) progressively reducing in thickness in a direction away from said separating line (24), and said second separating lines (24, 24) of the two brake pads (4, 6) being arranged in substantially superimposed relationship relative to each other on opposite sides of said brake disk (2).

10. A brake pad set comprising two brake pads (4, 6), each brake pad (4, 6) including a carrier plate (8) and a friction lining layer (10, 12) arranged thereupon, each friction layer (10, 12) including a radial symmetrically bisecting line (28);

each friction layer (10, 12) having a central area (22) of a substantially uniform layer thickness and an outer friction surface and an area (14, 16;

18, 20) of reduced layer thickness at at least one end of the brake pad (4, 6) with the reduced thickness layer area having an outer friction surface;

a separating line (24) defining an edge (24) between the central area (22) and the at least one reduced thickness layer area (14, 16;

18, 20) of each brake pad (4, 6), said separating line (24) and said line (28) defining an acute included angle, said reduced thickness layer area (14, 16;

18, 20) progressively reducing in thickness in a direction away from said separating line (24), said separating lines (24, 24) of the two brake pads (4, 6) being arranged asymmetrically in angularly offset crossing relationship relative to each other when located at opposite sides of a brake disk, each friction layer (10, 12) includes a second area (14, 16 or 18, 20) of reduced layer thickness at a second end of each brake pad (4, 6) opposite each brake pad one end, each second reduced thickness area having an outer friction surface, a second separating line (24) defining a second edge (24) between each central area (22) and the second reduced thickness layer area (16, 20), said second separating line (24) and said radial symmetrically bisecting line (28) being in substantially parallel relationship to each other, said second reduced thickness layer area (16, 20) progressively reducing in thickness in a direction away from said separating line (24), and said second separating lines (24, 24) of the two brake pads (4, 6) being arranged in substantially superimposed relationship relative to each other on opposite sides of said brake disk (2).