Model Relationship Find

Hi guys, I have a question regarding relationships, did not spot this in the docs.

If I have the following tables

 CREATE TABLE robots (
    id int(10) unsigned NOT NULL AUTO_INCREMENT,
    name varchar(70) NOT NULL,
    type varchar(32) NOT NULL,
    year int(11) NOT NULL,
    PRIMARY KEY (id)
);

CREATE TABLE robots_parts (
    id int(10) unsigned NOT NULL AUTO_INCREMENT,
    robots_id int(10) NOT NULL,
    parts_id int(10) NOT NULL,
    created_at DATE NOT NULL,
    PRIMARY KEY (id),
    KEY robots_id (robots_id),
    KEY parts_id (parts_id)
);

with models

class Robots extends \Phalcon\Mvc\Model
{

}

class RobotParts extends \Phalcon\Mvc\Model
{
    public function initialize()
    {
        $this->belongsTo(
            'robots_id',
            'Robots',
            'id'
        );
    }
}

Is there a way to get RobotParts where Robot type = "droid" in one find call (with loading in the robot details in the RobotParts model if possible) ? eg.

RobotParts::find();

SELECT * 
FROM robots_parts 
JOIN robots ON robots_parts.robot_id = robots.id
WHERE robots.type = "driod"

Thanks