Brake oil kettle

The utility model provides a brake oil kettle includes casing, lower casing and float, and upward casing and lower casing are cheng integrative through the sweat soldering. The epitheca is internal to be equipped with the float space of floating, and the float floats the space and is enclosed by the curb plate of two isolated boards with last casing, and isolated board length is greater than the curb plate of casing, extends the curb plate that the casing was gone up to the protrusion, goes up the casing and before the casing merges down, embeds the float in the float floats the space, and isolated board extends the into internal space of inferior valve, isolated board bottom under to bottom the casing within a definite time clearance be lighter than the height of float. The unilateral isolated board of traditional brake oil kettle comprises two butt joints, when the float fluctuates, must pass through the seam position, and when two isolated board butt joints were uneven, the float blocked very easily, the u