Squeal prevention shim of disc brake gear of vehicle, has tertiary board whose thickness reduces than secondary-board thickness, when compression set of tertiary board is carried out due to thrust during operation of brake device

摘要

The shim (8) with primary, secondary and tertiary boards (20,30,40) is fixed to rear plate (10) of brake pad (7). The thickness of tertiary board which is more than that of secondary board with an opening (33) formed at a press-contact area engageable to a caliper claw, reduces than secondary-board thickness, when compression set of tertiary board is carried out due to the thrust during operation of a brake device.