JPS6224138U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a front sectional view showing the main parts of a drum brake which is in an inoperative state and is equipped with a shoe clearance adjustment timing notification device, which is an embodiment of the present invention. FIG. 2 is a front sectional view showing a state in which the drum brake shown in FIG. 1 is in operation and the shoe clearance adjustment timing notification device is in operation.
FIG. 3 is a front sectional view showing the main parts of a drum brake equipped with a shoe clearance adjustment timing notification device according to another embodiment of the present invention. FIG. 4 is a front view (partially in section) showing a conventional drum brake with the brake drum removed. 10: Bucking plate, 12, 14: Brake shoe, 18, 28: Wheel cylinder, 2
0, 30: Piston, 22, 24: Anchor, 23
, 26: Cylinder body, 42: Brake drum, 44: Flange section, 50, 52: Adjustment nut, 54, 56: Adjustment bolt, 62: Disc section, 64: Thin plate piece (contact member), 72: Stopper (retainer) mating member), 74: Wheel cylinder, 76
: Piston, 78: Flange part, 80: Cylinder body, 82: Adjustment nut, 84: Adjustment bolt, 90: Thin plate piece (contact member), 100
: Engagement member, 102: Notch.

Amendment October 25, 1980 The scope of claims for utility model registration is amended as follows.

[Claims for Utility Model Registration] One end of a pair of brake shoes held by the bucking plate is supported by an anchor fixed to the bucking plate, while the other end is provided with a cylinder body fixed to the bucking plate. The brake shoe is engaged with the piston of the wheel cylinder, and as the piston moves forward, the brake shoe is pressed against the brake drum to suppress its rotation. In the drum brake equipped with a clearance adjustment device, an engaging member is provided on the piston, and the cylinder body is operated by the forward engaging member when the amount of advance of the piston reaches a size that requires adjustment of the shoe clearance. A shoe clearance adjustment timing notification device for drum brakes, characterized in that a notification device is provided to notify a driver of the need to adjust the shoe clearance. The brief description of the drawing has been amended as follows. On page 17 of the specification, line 9, after "is.", add the following sentence without making any changes. ``Figures 5 and 6 are views corresponding to Figures 1 and 2 showing still another embodiment of the present invention.'' Page 17, line 19 of the specification ``(contact member)'' is replaced with ``(contact member)''.
(Notification device)”. The following description is added on a new line after "102: Notch" on page 18, line 6 of the specification. "110: Dog (engaging member), 114: Switch (notification device), 120: Warning light"

Claims (1)

[Claims for Utility Model Registration] One end of a pair of brake shoes held by the bucking plate is supported by an anchor fixed to the bucking plate, and the other end is provided with a cylinder body fixed to the bucking plate. The brake shoe is engaged with the piston of the wheel cylinder, and as the piston advances, the brake shoe is pressed against the brake drum to suppress its rotation, and the retracting end of the piston is defined by the cylinder body, and the manual shoe In a drum brake equipped with a clearance adjustment device, the piston is provided with an engaging member, and the cylinder body is engageable with the engaging member, and the tip thereof is always located away from the brake drum; When the amount of advance of the piston reaches a size that requires adjustment of the shoe clearance, a contact member is attached that contacts the brake drum based on the movement of the engaging member that moves with the piston, and the sound generated by the contact is A drum brake shoe clearance adjustment timing notification device, characterized in that it notifies that the shoe clearance has reached a level that requires adjustment.