Drum brake device
AssigneeNisshinbo Industries, Inc.
InventorTakashi Ikeda
Life of this patent
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Abstract
This invention provides a duo-two leading type drum brake device which simplifies a drum brake structure as well as improves a transmission efficiency of a application force from a shoe actuator to brake shoes. A pivot lever 60 has an intermediate portion pivotally supported on the brake shoes 40. A shoe-actuator 20 is positioned adjacent to the first anchors 30, 30 and being disposed between the ends 60a, 50a of the pivot lever 60 and the other brake shoe 50. A strut 70 is positioned between and functionally engaged with the other ends 60b, 50b of the pivot lever 60 and the other brake shoe 50. An application force of the shoe actuator 20 is transmitted to the brake shoe 40 via a pivot section of the pivot lever 70 and transmitted to the other brake shoe 50 directly from the shoe-actuator 20 and indirectly via the strut 70.
Claims7
A drum brake device comprising:
- a pair of brake shoes positioned to face each other and to be frictionally engageable with an inner circumferential surface of a brake drum,
- a first anchor, supporting said pair of brake shoes, disposed between first adjacent ends of said brake shoes,
- a second anchor disposed between second adjacent ends of said brake shoes opposite said first adjacent ends,
- a pivot lever with an intermediate portion pivotally supported on a first one of said brake shoes,
- a shoe-actuator positioned adjacent to said first anchor and being disposed between one end of said pivot lever and a second one of said brake shoes, and
- a strut positioned adjacent to said second anchor and being disposed between and being functionally engaged with a second end of said pivot lever and the second one of said brake shoes,
- wherein an application force of said shoe-actuator is transmitted to said first one of said brake shoes via a pivot section of said pivot lever and transmitted to the second one of said brake shoes directly from said shoe-actuator and indirectly via said strut.
Dependencies are inferred from the claim text.