| 摘要 |
An improved drum brake assembly wherein the operating condition of the brake shoes and the automatic brake adjusting mechanism can be determined without removing any component from the associated vehicle includes a backing plate, a brake drum, and first and second brake shoes supported on the backing plate and movable into frictional engagement with the brake drum. Each of the first and second brake shoes includes a web portion, a table portion secured to the web portion, and a friction pad secured to the table portion. The drum brake assembly further includes a service brake mechanism for selectively moving the to brake shoes into frictional engagement with the brake drum, a parking and emergency brake mechanism for selectively moving the brake shoes into frictional engagement with the brake drum, and an automatic brake adjusting mechanism carried by the brake assembly and operatively connected to said first and second brake shoes. The drum brake assembly further includes a device for indicating the operating condition of the brake shoes and for indicating the operating condition of the automatic brake adjusting mechanism./!
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