Maintenance auxiliary tool of brake system

A maintenance auxiliary tool of brake system comprising:

• a main body including an outer rod, a support rod and an adjusting rod, the outer rod provided with a first axial hole on its center axis and provided with a support frame at one end of the outer rod, a first adjusting member provided at one end of the support frame and longitudinally adjustable, a second adjusting member provided at the other end of the support frame and longitudinally adjustable, the first adjusting member and the second adjusting member arranged on the support frame and a transversely distance therebetween is adjustable, the outer rod longitudinally provided with a first cut slot and a second cut slot on its external circumference along its axial direction, one side of an external circumference of the support rod connected with the external circumference of the outer rod, the support rod longitudinally provided with a second axial hole on its center axis, the adjusting rod provided with a connection element at one end thereof and provided a ratchet element in a middle of an external circumference of the adjusting rod, the connection element provided with a top supporting member, the top supporting member provided with a concave slot;
• a locking module provided in the other side of the external circumference of the support rod, the locking module connected to the ratchet part;
• a pneumatic module including a pneumatic cylinder, a first airflow device, a second airflow device and an action rod, the pneumatic cylinder and an elastic element received within the first axial hole in sequence, the first airflow device placed within the first cut slot and connected with one end of an external circumference of the pneumatic cylinder, the second airflow device placed within the second cut slot and connected with the other end of the external circumference of the pneumatic cylinder, the first airflow device and the second airflow device depressing the first cut slot and the second cut slot respectively, the action rod connected to one end of the pneumatic cylinder, one end of the action rod connected to a piston and the other end of the action rod connected to a contact member, the first airflow device provided with a first adjusting valve on its top surface and provided with a first airflow opening on its external circumference, the second airflow device provided with a second adjusting valve on its top surface and provided with a second airflow opening on its external circumference;
• and
• a controller communicated with the first airflow opening and the second airflow opening.