JPH032931U

JPH032931U -

Info

Publication number: JPH032931U
Application number: JP1989063310U
Authority: JP
Priority date: 1989-05-31
Filing date: 1989-05-31
Publication date: 1991-01-11

Description

[Brief explanation of drawings]

第１図は本考案の一実施例であるピストンの側
面図、第２図は第１図のピストンに装着されるカ
ツプの縦断面図、第３図は他の実施例であるピス
トンの側面図、第４図は第３図のピストンに嵌着
されるカツプの縦断面図、第５図は更に他の実施
例でありテーパ状の小径部にしたピストンの側面
図、第６図は第５図のピストンに嵌着されるカツ
プの縦断面図、第７図はカツプを逆方向に嵌着し
た状態で組付けしているときの縦断面図、第８図
はカツプを正しい方向に嵌着した状態で組付けし
ているときの縦断面図、第９図は組付けた状態を
示す縦断面図、第１０図は従来のホイールシリン
ダの組付け縦断面図、第１１図は、第１０図のホ
イールシリンダのカツプを逆方向にして組付けす
る状態を示す縦断面図、第１２図は第１０図のホ
イールシリンダのカツプを正しい方向にして組付
けする状態を示す縦断面図、第１３図は正しい方
向で組付けられたカツプの部分拡大縦断面図、第
１４図は逆方向に組付けられたカツプの部分縦断
面図、第１５図はドラムブレーキ装置の概略を説
明するために示した正面図である。５…ピストン、６…嵌着部、７…カツプ、１０
…大径部、１１…小径部、１２…嵌着孔、１３…
大径孔、１４…小径孔。 Fig. 1 is a side view of a piston that is an embodiment of the present invention, Fig. 2 is a longitudinal sectional view of a cup attached to the piston of Fig. 1, and Fig. 3 is a side view of a piston that is another embodiment of the invention. , FIG. 4 is a vertical sectional view of a cup fitted into the piston of FIG. 3, FIG. 5 is a side view of a piston with a tapered small diameter portion, and FIG. Figure 7 is a vertical cross-sectional view of the cup fitted into the piston shown in the figure, Figure 7 is a vertical cross-sectional view of the cup being assembled with the cup fitted in the opposite direction, and Figure 8 is a vertical cross-sectional view of the cup fitted in the correct direction. 9 is a vertical sectional view showing the assembled state, FIG. 10 is a longitudinal sectional view of a conventional wheel cylinder assembled, and FIG. Fig. 12 is a longitudinal sectional view showing the wheel cylinder shown in Fig. 10, with the cup turned in the correct direction and assembled; Fig. 13 is a longitudinal sectional view showing the wheel cylinder shown in Fig. The figure is a partially enlarged vertical cross-sectional view of the cup assembled in the correct direction, Figure 14 is a partial vertical cross-sectional view of the cup assembled in the opposite direction, and Figure 15 is shown to explain the outline of the drum brake device. FIG. 5...Piston, 6...Fitting part, 7...Cup, 10
...Large diameter part, 11...Small diameter part, 12...Fitting hole, 13...
Large diameter hole, 14...small diameter hole.

Claims

[Scope of utility model registration request]

In a drum brake device that performs braking by pressing a brake shoe against a drum using hydraulic pressure generated in a wheel cylinder, a cup fitting portion of a piston attached to the wheel cylinder is formed with a large diameter and a small diameter, and the cup fitting portion is formed with a large diameter and a small diameter. 1. A drum brake device characterized in that a fitting hole for a cup to be fitted into the cup is formed to match a large diameter and a small diameter of the cup fitting part.