Patent ID: 6702406
Filing Date: 2004-03-09
Classification: B62D

Abstract:
A travel gear of a crawler work vehicle, comprising:a track frame extending in a longitudinal direction of the vehicle and provided in a lower part of a vehicle body; a plurality of double bogie track wheel devices attached in a lower portion of the track frame; a crawler rotatably wound around the track frame; a sprocket for rotating the crawler; and an idler for guiding rotation of the crawler, wherein each of the plurality of double bogie track wheel devices comprises: a first arm member attached to the lower part of the track frame so as to be swingable in a vertical direction; a second arm member extending in the longitudinal direction of the track frame, the second arm having a center portion rotatably attached to a tip of the first arm member so that front and rear ends of the second arm member are swingable in the vertical direction; a pair of front and rear track wheels rotatably attached to the front and rear ends of the second arm member and rotating on a tread of the crawler; and a pair of first guard devices attached to side faces of the first arm member in a widthwise direction of the vehicle to thereby prevent intrusion of a foreign matter into a space between the pair of front and rear track wheels and the crawler.