TH19764B - Waterproof structure of drum brakes - Google Patents

Abstract

The DC60 drum brake (20A) consists of the hub (21), the brake wall plate (30) and the drum brake mechanism (40) .The gap (52) between the hub and the brake wall is mechanically sealed. Agitation type (50) In the agitating mechanism and in part of the drum brake positioned over the axle (12), the outer perimeter (51) of the brake wall plate is assembled. In the concave part (23), the outer surface of the brake wall plate has been formed with the outer flute (53) and the inner flute (54), arranged in this order from the outside in the direction. Width of the wall plate to the inside of the concave section The sectional area (A1) of the outer whirlpool is smaller than the sectional area (A2) of the inner groove. Drum brake (20A) is assembled with the hub (21 ) The brake wall plate (30) and the drum brake mechanism (40) the gap (52) between the wheel hub and the brake wall plate are sealed by a agitating mechanism (50) in the agitation mechanism and at Part of the drum brake positioned above the wheel axle (12), the outer perimeter (51) of the brake wall plate, can be assembled into the concave (23) outer surface of the brake wall plate. Has been formed into an outer slit (53) and Each inner part (54) is arranged in this order, from the outside in the direction of the width of the wall plate approaching the inside of the concave, the cross-sectional area (A1) of the outer part is smaller than the cross-section area (A2) of Inner groove

Claims (3)

1.The waterproof structure of the drum brake (20A), which consists of a wheel hub (21) with a recess (23) for the acquisition of a drum brake mechanism (40) in it and a brake wall plate (30). Which covers the concave (23) while supporting the main part of the drum brake mechanism, the gap (52) between the wheel hubs is Swivel assembly and brake wall plate are non-rotating assemblies. Will be sealed by a unique (50) loop structure that Where part of the drum brake is positioned under the axle (12), the track structure The maze has an outer (53) and an inner (54) maze that has been formed in this order. From the outside to the inside of the concave, three first to third (61, 62, 63) drain structures are continuously formed. And along the circumference from the bottom of the brake The drum type reaches near the vertical position of the shaft, and the waterproof wall (65) protrudes in the exit direction. Outside along the radius from the aforementioned brake wall plate to part of the aforementioned three types of vent structure. The first to the third One such vent structure (61) was placed at the bottom. And there are outer ridges (55) and intermediate ridges (56) on both sides. In the middle there is a minimum height (H11) compared to other vent structures, such a hub And such waterproof walls are spaced (W1) widest from each other in the vent structure. One to increase the drainage performance The second vent structure (62) is positioned higher than the first ventricle and has an outer ridge (55) and an intermediate ridge (56) on both sides of the outer ridge, side ridge. The outer and intermediate ridges in the second vent structure have the same height (H11) as the outer and intermediate ridges in the first vent structure, the hub and the waterproof wall. They are spaced narrower (W2) from each other in the second vent structure than in the vent structure. First, to balance both vent and sealing performance, and such a third vent structure (63) is positioned higher than the second vent structure. And there are outer ridges (55) and intermediate ridges (56) on either side of the outer ridge, the outer and intermediate ridges in the third vent structure. Will protrude higher than the outer ridge and Intermediate ridges in the first and second vent structures, and such hubs and such waterproof walls are spaced narrower (W2) from each other than in the first vent structure. To improve the sealing performance 2.The waterproof structure of the motorcycle rear drum brake (20A), which consists of a hub (21) with a recess (23) for the reception of a drum brake mechanism (40) in it and a wall plate. Brake (30), which covers the aforementioned part (23) while supporting the main part of the drum brake mechanism, the gap (52) between the hub as a rotating assembly and the brake wall plate as a non-rotating assembly. Sealed by a looped structure (50), the brake wall plate will not be supported by a rotary motion. On the rear fork (11) of a motorcycle (10) with the characteristics that The brake wall plate has an overhang along the rear fork to prevent rotation of the brake wall plate. Between the overhang (32) and the rear fork And waterproof walls (68) will be formed on Such filing To block the water reflected by the outer surface of the protrusion And move towards the structure Such maze 3. The waterproof device of the motorcycle rear drum brake, as requested in claim 2, with the aforementioned waterproof wall (65) extended towards the outer perimeter (22a) of the front disc. Get the spoke (22) that are straight from the said hub (21).