YWZ4-300/E50 ELECTRO HYDRAILIC DRUM BRAKE

The traditional electro-hydraulic drum brake test-bed is operated manually, so the test accuracy is insufficient and the labor intensity is high. In order to overcome the shortcomings of traditional methods, a fully automatic brake test-bed with high accuracy and full functions is developed.

The working principle and structural characteristics of a new electro-hydraulic drum brake test-bed are introduced, and the factors affecting the test accuracy of this test-bed are analyzed. At the same time, the effective ways to reduce the measurement error are expounded, and the actual test proves that the test-bed conforms to the national standards, with high precision and good performance, and can be widely applied to the type test of various types of electro-hydraulic drum brakes.

The utility model belongs to the field of brake production, in particular to an electric hydraulic drum brake, which comprises a bottom plate, a pusher, a fixed beam, a left brake arm, a right brake arm, a brake shoe I, a brake shoe II, a spring rod, a joint I, a joint II, a support frame, a fixed seat, a lever arm, a linkage rod and a joint III.

Two ends of a fixed beam on the bottom plate are hinged with a left brake arm and a right brake arm, the upper parts of the two brake arms are hinged with two ends of a spring rod, the two brake arms are pin-connected with a first brake shoe and a second brake shoe, and the two brake shoes are matched with brake shoes;

The support frame at the right end of the bottom plate is provided with a fixed seat, the upper end of the right brake arm is pinned with the lower part of the left end of the lever arm, the left end of the linkage rod is hinged with the upper end of the left brake arm, the right end of the linkage rod is pinned with the upper part of the left end of the lever arm, the lower end of the pusher is hinged with the fixed seat, and the right end of the lever arm is hinged with the upper end of the pusher; The electro-hydraulic pusher is equipped with an electric box with a perspective window on the button cover. The brake has good braking effect, is safe and reliable, and is convenient for inspection and maintenance.

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