JPS61160335U

JPS61160335U -

Info

Publication number: JPS61160335U
Application number: JP4430185U
Authority: JP
Priority date: 1985-03-26
Filing date: 1985-03-26
Publication date: 1986-10-04

Description

[Brief explanation of drawings]

第１図は本考案の一実施例の部分断面図、第２
図は第１図のＢ部拡大図、第３図は第２図中の
―線に沿う断面図、第４図は第１図の上方から
見た図、第５図は第１図の左方から見た図、第６
図は第４図中の―線に沿う断面図、第７図は
第１図のホイルブレーキシリンダを使用したドラ
ムブレーキ機構の正面図である。符号の説明、３０……パツキングプレート、３
１，３２……ブレーキシユー、３３，３４……ブ
レーキシユーリターンスプリング、３５，３６…
…ホイルブレーキシリンダ、４０……シリンダボ
デー、４１……シリンダ穴、４２……ピストン、
４５……調節ナツト、４５ａ……ラチエツトホイ
ル部、４５ｃ……歯、４６……調節ボルト、４７
……調節レバー、４７ｂ……爪、４７ｆ……孔、
４８……軸、４９……連結板、５０……引張りコ
イルスプリング。 Fig. 1 is a partial sectional view of one embodiment of the present invention;
The figure is an enlarged view of part B in Figure 1, Figure 3 is a sectional view taken along the - line in Figure 2, Figure 4 is a view from above in Figure 1, and Figure 5 is on the left side of Figure 1. View from the side, No. 6
The figure is a sectional view taken along the line - - in FIG. 4, and FIG. 7 is a front view of a drum brake mechanism using the wheel brake cylinder of FIG. 1. Explanation of symbols, 30... Packing plate, 3
1, 32... Brake shoe, 33, 34... Brake shoe return spring, 35, 36...
...Wheel brake cylinder, 40...Cylinder body, 41...Cylinder hole, 42...Piston,
45...Adjustment nut, 45a...Ratchet foil part, 45c...Teeth, 46...Adjustment bolt, 47
...Adjustment lever, 47b...nail, 47f...hole,
48... shaft, 49... connecting plate, 50... tension coil spring.

Claims

[Scope of utility model registration request]

A cylinder body attached to the bucking plate, a hydraulically actuated piston slidably fitted in the cylinder body, a shaft rotatably fitted in the center hole of the piston, and a hydraulic piston fitted outside the cylinder body. an adjustment nut having a ratchet wheel portion that rotates integrally with the shaft portion; an adjustment bolt that is threadedly engaged with the adjustment nut and is engaged with a brake shoe to prevent rotation; and a ratchet wheel that is pivotally connected to the cylinder body and that rotates. a rigid adjusting lever having a pawl that engages with a tooth of the adjusting lever; a connecting plate having an abutting portion that is provided to move together with the piston and can come into contact with a portion of the adjusting lever; A tension member is provided between the connecting plate and the adjusting lever so that the abutting portion of the connecting plate and the part of the adjusting lever are brought into contact with each other, and the pawl of the adjusting lever is brought into pressure contact with the tooth of the ratchet foil portion. In a wheel brake cylinder equipped with a tension coil spring, the piston is located between the outer periphery of a shaft that pivotally connects the adjustment lever to the cylinder body and the inner periphery of a hole in the adjustment lever through which this shaft passes. A gap is provided to allow the adjustment lever to move integrally with the ratchet wheel in the axial direction of the cylinder body due to the frictional force between its pawl and the teeth of the ratchet wheel. A wheel brake cylinder in which the adjustment nut is set to twice to four times the shoe clearance adjustment amount produced by rotating the ratchet wheel portion by one tooth.