Pedal operation mechanism of pedal brake and assembling method thereof

The present invention discloses a foot pedal for actuating the brake mechanism, comprising: a pendulum (2), is connected to the pivot lever (2) and the pedal (1), swingable about a shaft (10) according to the foot braking operation and having a free end (2B); connecting member connected to the body frame (4); and a return spring (3), having one end connected on the pivot lever (2) the free end (2B), the other end is connected to the said connecting member; pretensioned wherein the return spring (3) of said connecting member can be adjusted by achieved. The present invention also discloses a method for assembling a mechanism for actuating pedal. By the above-described method of assembling actuating pedal, the return spring may be mounted and adjusted pretensioning together, thereby simplifying the structure and reducing the cost.