Revolving apparatus for work vehicle

A revolving apparatus for a work vehicle, comprising:

• a drive unit;
• a brake unit disposed under the drive unit;
• a deceleration unit disposed under the brake unit;
• and
• an output unit disposed under the deceleration unit,
• the brake unit having
• a brake main body that stops revolution,
• a housing having a first face and at least one first concave component formed in the first face,
• a piston having a second face opposite the first face and at least one second concave component formed in the second face, the piston being disposed between the brake main body and the housing, and the piston being movable with respect to the housing in order to actuate the brake main body, and
• at least one spring member having two ends held in the first concave component and the second concave component, the spring member biasing the piston toward a brake main body side so as to actuate the brake main body,
• the first concave component and the second concave component having cylindrical shapes, and
• an inside diameter of the first concave component is greater than an inside diameter of the second concave component.