Mechanical type disc brake

摘要

A connecting portion 4f to which a pushrod actuating mechanism 7 is connected is provided on an opposite side, to a disc rotor 5, of a bottom wall of a cylinder bore 4e of a caliper body 4 so as to project therefrom. An accommodation bore 4m that accommodates a pushrod 12 and an adjusting bolt 18 is formed in the connecting portion 4f. In forming the caliper body 4, the connecting portion 4f is formed so as to have the same section shapes when taken along a direction perpendicular to an cylinder axial direction. By cutting the connecting portion 4f so that a length of the connecting portion 4f in the cylinder axial direction becomes a predetermined length and processing the connecting portion 4f, a connecting surface 4n to which the pushrod actuating mechanism 7 is connected is formed on the connecting portion 4f.

主权项

1. A mechanical type disc brake comprising:
a caliper body including an acting portion that is provided on one side of a disc rotor and is formed with a cylinder bore which opens to a disc rotor side of the acting portion; a piston member that is inserted into the cylinder bore so as to be movable, wherein the piston member includes a proximal end portion that project towards an opposite side to the disc rotor, of the cylinder bore; and a piston member actuating mechanism that is provided on the opposite side, to the disc rotor, of the cylindrical bore and moves the piston member in a cylinder axial direction as a rotating arm operates, wherein the rotating arm rotates by pulling a brake wire, and wherein,
a connecting portion has same section shapes when taken along a direction perpendicular to the cylinder axial direction at different positions located on the cylindrical axis,the connecting portion has a predetermined length to form a connecting surface to which the piston member actuating mechanism is connected, andan accommodation bore that is larger than a diameter of a pushrod of the piston member and which accommodates therein the proximal end portion of the piston member in the connecting portion, from a connecting surface side of the piston member.