Flanged shim for disc brake squeal attenuation
View Patent ↗A brake pad assembly provided for a disc brake apparatus. The brake pad assembly comprises a backing plate having a flat inner face and a flat outer face oriented opposite to the inner face, a friction member fixed to the inner face of the backing plate, and an anti-squeal shim attached to the outer face of the backing plate. The anti-squeal shim includes a flat support plate attached to the outer face of the backing plate and a straight flat flange plate. The support plate of the anti-squeal shim has a peripheral edge including opposite outer and inner edges and opposite side edges. The flange plate is in the form of a flexible cantilever formed integrally with the support plate of the anti-squeal shim and extends away from one of the outer, inner and opposite side edges of the support plate of the anti-squeal shim.
1. A brake pad assembly for a disc brake apparatus, said brake pad assembly comprising:
a backing plate having an inner face and an outer face oriented opposite to said inner face;
a friction member having an outer face that faces and is fixed to said inner face of said backing plate; and
an anti-squeal shim immovably attached to said outer face of said backing plate;
said anti-squeal shim including a support plate attached to said outer face of said backing plate and a straight flat flange plate;
said support plate of said anti-squeal shim having an outer peripheral edge surrounding said support plate, said outer peripheral edge of said support plate including opposite outer and inner edges;
said flange plate being in the form of a flexible cantilever formed integrally with said support plate of said anti-squeal shim and extending from an entire length of an edge selected from the group consisting of said outer, inner and opposite side edges of said support plate of said anti-squeal shim in a direction perpendicularly away from said outer face of said friction member.
2. The brake pad assembly as defined in claim 1 , wherein both said support plate and said flange plate are formed integrally from a single blank of a shim material.
3. The brake pad assembly as defined in claim 2 , wherein said shim material is a multi-layer composite material.
4. The brake pad assembly as defined in claim 3 , wherein said multi-layer composite material includes a stainless steel plate coated with a layer of adhesive on one face thereof and with a layer of paint on the other face thereof.
5. The brake pad assembly as defined in claim 1 , wherein one of said outer, inner and opposite side edges of said support plate of said anti-squeal shim from which said flange plate extends is formed as a straight line.
6. The brake pad assembly as defined in claim 5 , wherein said flange plate of said anti-squeal shim comprises a first flange plate, and wherein said anti-squeal shim comprises a second flange plate extending along an entire length of another edge selected from the group consisting of said outer, inner and opposite side edges of said support plate of said anti-squeal shim.
7. The brake pad assembly as defined in claim 5 , wherein said flange plate extends along said inner edge of said support plate of said anti-squeal shim.
8. The brake pad assembly as defined in claim 5 , wherein said flange plate extends along said outer edge of said support plate of said anti-squeal shim.
9. The brake pad assembly as defined in claim 1 , wherein vertices of said outer peripheral edge of said support plate of said anti-squeal shim are located on said outer face of said backing plate within an outer peripheral edge of said backing plate so as to not extend beyond said outer peripheral edge of said backing plate.
10. A disc brake apparatus comprising:
a brake support member;
a brake rotor;
a brake pad assembly slidably supported by said brake support member so as to be movable over a predetermined distance in the axial direction of said brake rotor;
a caliper straddling said brake rotor and slidably mounted to said brake support member to allow sliding in the axial direction of the brake rotor, said caliper having a cylinder formed therein; and
a piston slidably mounted in said cylinder of said caliper to allow sliding in the axial direction of said brake rotor, said piston facing said brake pad assembly at a side thereof remote from said brake rotor;
said brake pad assembly comprising:
a backing plate having a flat inner face facing said brake rotor and a flat outer face oriented opposite to said inner face and facing said piston;
a friction member fixed to said inner face of said backing plate; and
an anti-squeal shim immovably attached to said outer face of said backing plate;
said anti-squeal shim including a flat support plate attached to said outer face of said backing plate and a straight flat flange plate;
said support plate of said anti-squeal shim having an outer peripheral edge surrounding said support plate, said outer peripheral edge of said support plate including opposite outer and inner edges and opposite side edges;
said flange plate being in the form of a flexible cantilever formed integrally with said support plate of said anti-squeal shim and extending from an entire length of an edge selected from the group consisting of said outer, inner and opposite side edges of said support plate of said anti-squeal shim in a direction perpendicularly away from the outer face of the backing plate and a face of said brake rotor that faces the backing plate;
said flange plate of said anti-squeal shim spaced from said brake support member, said caliper and said piston.
11. The brake pad assembly as defined in claim 10 , wherein both said support plate and said flange plate are formed integrally from a single blank of a shim material.
12. The brake pad assembly as defined in claim 10 , wherein one of said outer, inner and opposite side edges of said support plate of said anti-squeal shim from which said flange plate extends is formed as a straight line.
13. The brake pad assembly as defined in claim 12 , wherein said flange plate extends along said inner edge of said support plate of said anti-squeal shim.
14. The brake pad assembly as defined in claim 12 , wherein said flange plate extends along said outer edge of said support plate of said anti-squeal shim.
15. The brake pad assembly as defined in claim 12 , wherein said flange plate extends along one of said opposite side edges of said support plate of said anti-squeal shim.
16. The brake pad assembly as defined in claim 10 , wherein vertices of said outer peripheral edge of said support plate of said anti-squeal shim are located on said outer face of said backing plate within an outer peripheral edge of said backing plate so as to not extend beyond said outer peripheral edge of said backing plate.
17. A brake pad assembly for a disc brake apparatus, said brake pad assembly comprising:
a backing plate having an inner face and an outer face oriented opposite to said inner face;
a friction member having an outer face that faces and is fixed to said inner face of said backing plate; and
an anti-squeal shim immovably attached to said outer face of said backing plate;
said anti-squeal shim including a support plate attached to said outer face of said backing plate and a straight flat flange plate;
said support plate of said anti-squeal shim having an outer peripheral edge surrounding said support plate, said outer peripheral edge of said support plate including opposite outer and inner edges and opposite side edges, wherein said outer peripheral edge of said support plate of said anti-squeal shim is located on said outer face of said backing plate within an outer peripheral edge of said backing plate so as to not extend beyond said outer peripheral edge of said backing plate;
said flange plate being in the form of a flexible cantilever formed integrally with said support plate of said anti-squeal shim and extending from an entire length of an edge selected from the group consisting of said outer, inner and opposite side edges of said support plate of said anti-squeal shim.
18. The brake pad assembly as defined in claim 17 , wherein said flange plate extends away from one of said outer, inner and opposite side edges of said support plate of said anti-squeal shim in a direction perpendicularly away from said outer face of said friction member.