EKKO EK20R Manual page 19

shoe is pressed against the fixed pin ,the brake shoe moves in the direction of
the brake drum. After the fixed pin is pressed ,the frictional force between the
friction lining and the brake drum is increased. Because the main brake shoe
gives the auxiliary brake shoe a much greater pressure than the brake cylinder
pressure ,thereby generating a large braking force .
The parking brake is mainly used in the parking state to prevent accidents
caused by slopes. A parking switch is mounted on the parking brake .and the
control circuit is disconnected in the parking The stop brake must be released
before the forklift starts to walk ,and the control circuit can be
connected .Parking brake has the function of adjusting tightness .
5.3.2Brake pedal
The brake pedal portion is constructed as shown in the figure ,and the pedal
converts in the pedaling force acting on the pedal into the brake oil pressure by
the push rod of the master cylinder .
1．Brake oil cup
support 5.limit bolt
5.3.3 Brake master cylinder
The master cylinder includes a valve seat ,a check valve, a return spring ,and
a main cup, piston and auxiliary cup. The master cylinder piston is actuated by
the operating brake pedal through the push rod, when the brake pedal is
depressed ,the push rod pushes the piston forward .and the brake fluid in the
pump body flows back to the oil storage tank through the oil return port until the
main the cup stops the oil return hole .After the main cup is pushed over the oil
return port .The brake fluid in the front chamber of the main pump is
compressed and the check valve is opened to flow through the brake line to the
sub -Pump.in this way ,each of the sub-pump pistons protrudes outward ,so that
the brake shoe friction plate and the brake drum are in the contact with each
other to achieve the effect of deceleration of braking .At this time ,The rear
chamber of the piston is replenished by the brake fluid from the oil return port
and the oil inlet port .When the brake pedal is released ,the piston is pressed
back by the return spring and the brake fluid in each brake cylinder is also
compressed by the brake shoe return spring .so that the brake fluid returns to
the original position. The brake fluid in the master cylinder flows back to the oil
storage tank through the oil return port .The pressure of the check valve is
adjusted to a certain ratio with the residual pressure in the brake line and the
2.Brake pedal 3.Brake master Cylinder
6.brake sensor
13
4.brake