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US 2015/0176664 A1Published application
Drum brake apparatus
AssigneeAkebono Brake Industry Co., Ltd.
InventorsToshifumi Maehara, Hiroaki Nakamura
Life of this patent
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Abstract
A drum brake apparatus includes first and second brake shoes, a wheel cylinder, an anchor portion, an adjuster, an expansion mechanism for expanding the first and second brake shoes, a switch lever mechanism rotatable by an action force of a given or higher value from the expansion mechanism, and a switch strut, following the rotation of the switch lever mechanism, for expanding the anchor-portion side adjoining ends of the first and second brake shoes.
Claims5
A drum brake apparatus, comprising:
- a pair of brake shoes disposed opposed to an inner peripheral surface of a brake drum and elastically supported movably on a backing plate;
- a wheel cylinder interposed between a one-side adjoining ends of the paired brake shoes for expanding the paired brake shoes respectively;
- an anchor portion fixed to the backing plate and contactable by the other-side adjoining ends of the paired brake shoes;
- an adjuster interposed between the one-side adjoining ends of the paired brake shoes existing near the wheel cylinder for adjusting a shoe clearance;
- an expansion mechanism arranged in series with the adjuster and, on receiving an operation force, for expanding the paired brake shoes respectively;
- a switch lever mechanism rotatably mounted on one of the brake shoes and rotatable by an action force of a given or higher value from the expansion mechanism;
- and
- a switch strut interposed between the anchor-portion side adjoining ends of the paired brake shoes and, following the rotation of the switch lever mechanism, for expanding the anchor-portion side adjoining ends of the paired brake shoes.
5 more elements
Dependencies are inferred from the claim text.