Hydraulic brake system

A hydraulic brake system which is adapted to be assembled on a steering assembly, the hydraulic brake system comprising:

• a connecting member having a receiving room defined therein and a receiving opening defined at one side thereof, the receiving opening communicating with the receiving room, the receiving room having an opening defined at one end of the connecting member;
• a hydraulic device having a hydraulic cylinder and a fluid tank, the hydraulic cylinder received in the receiving room via the opening of the receiving room, the fluid tank inserted in the receiving opening of the connecting member and connected with the hydraulic cylinder, the hydraulic cylinder having a main body, two pistons and two springs, the main body having two hydraulic chambers defined therethrough and a guiding channel defined in a top side thereof, the guiding channel communicating with the two hydraulic chambers with one end and communicating with the fluid tank with another end, the two pistons assembled in the two hydraulic chambers of the main body respectively, two springs sleeving onto the two pistons respectively;
• and
• two brake cables connected with the hydraulic cylinder, each brake cable has one end inserted into each hydraulic chamber and connected with each piston so as to control the movement of each piston relative to each corresponding spring;
• and
• two fluid pipes connected with a bottom side the hydraulic cylinder, each fluid pipe communicating with each corresponding hydraulic chamber;
• wherein, when the brake cable pulls the piston to press a fluid in the hydraulic chamber, the fluid flows into the fluid pipe so as to control a brake device.