Brake cylinder adjustment assembly

A brake cylinder adjustment assembly comprising:

• a rotation unit having a rotatable disk, a fixed disk, at least two positioning rods and a clip, the rotatable disk having at least two curved slots defined at one side thereof and a through hole defined centrally through the rotatable disk, the fixed disk having at least two slide slots extending from a first side to a second side thereof and two positioning slots defined at the second side of the fixed disk and located corresponding to the at least two slide slots, a protrusion extending from the second side of the fixed disk and capable of being inserted through the through hole of the rotatable disk, the protrusion having a polygonal hole defined therein and a groove defined at an outer surface of the protrusion, the clip is engaged with the groove, the at least two positioning rods engaged with the at least two slide slots of the fixed disk, each of the at least two positioning rods having a positioning flange at an end thereof and the two respective positioning flanges engaged with the positioning slots of the fixed disk, each of the positioning flanges having a guide extending therefrom which is engaged with the curved slot corresponding thereto, and
• a driving unit having an operation rod, a left positioning socket, a right positioning socket, a board and a driving rod, the operation rod having a left threaded section and a right threaded section respectively formed at left and right sections thereof, a left hole defined through the operation rod and located close to one end of the left threaded section, a right hole defined through the operation rod and located close to one end of the right threaded section, a polygonal left end part and a polygonal right end part respectively extending from two ends of the operation rod, the left end part having a left positioning bead retractably engaged with one side thereof, the polygonal right end part having a right positioning bead retractably engaged with one side thereof, the left positioning socket having inner threads defined therein and the right positioning socket having inner threads defined therein, the left positioning socket and the right positioning socket respectively and threadedly connected to the left threaded section and the right threaded section, the left positioning socket having a first flange and the right positioning socket having a second flange, the board having a notch, the left positioning socket or the right positioning socket engaged with the notch of the board, the driving rod capable of being inserted through the left hole or the right hole of the operation rod.