A drive assembly has a track frame, an idler, and a sprocket arranged substantially on a straight line that includes single track roller units disposed respectively closest to the idler and closest to the sprocket. The single track roller units each rotatably support a track roller at an end of an
A drive assembly has a track frame, an idler, and a sprocket arranged substantially on a straight line that includes single track roller units disposed respectively closest to the idler and closest to the sprocket. The single track roller units each rotatably support a track roller at an end of an arm that is rockably attached at another end to the track frame. The single track roller units bear the vehicle body load at the distal end of the arm through elastic members. A double track roller unit is interposed between the single track roller units, and includes a first arm rockably attached at its end to the track frame and a second arm rockably attached at its central portion to another end of the first arm. The second arm rotatably supports paired front and rear track rollers at two ends thereof.
대표청구항▼
What is claimed is: 1. A drive assembly for a track vehicle having a track frame, an idler and a sprocket arranged substantially on a straight line, a plurality of track rollers disposed rotatably below the track frame, and a crawler made to run around the idler, the track rollers and the sprocket,
What is claimed is: 1. A drive assembly for a track vehicle having a track frame, an idler and a sprocket arranged substantially on a straight line, a plurality of track rollers disposed rotatably below the track frame, and a crawler made to run around the idler, the track rollers and the sprocket, the drive assembly comprising: single track roller units disposed at portions closest to the idler and the sprocket respectively, each single track roller unit having an a arm whose proximal end portion is attached to the track frame so as to rock, a track roller rotatably supported at a distal end portion of the arm, and an elastic member disposed between the arm and the track frame in a rotating direction of the arm; and a double track roller unit interposed between the single track roller units having a first arm whose proximal end portion is attached to the track frame so as to rock, a second arm whose central portion is attached to a distal end portion of the first arm, and a pair of front and rear track rollers rotatably supported on both distal ends of the second arm, wherein a pair of track frames is disposed on right and left sides of the track vehicle, each track frame having both the single-track roller units and the double track roller unit, and a vehicle body load is borne via the elastic member. 2. The drive assembly for a track vehicle according to claim 1, wherein an elastic member is disposed between the first arm of the double track roller unit and the track frame in a rocking direction of the first arm of the double track roller unit and the vehicle body load is borne via the elastic member. 3. The drive assembly for a track vehicle according to claim 1, wherein a rocking fulcrum of the arm of the single track roller unit and a rocking fulcrum of the first arm of the double track roller unit are disposed closer to the idler than the distal end portions of the arm of the single track roller unit and the first arm of the double track roller unit. 4. The drive assembly for a track vehicle according to claim 1, wherein the arm of the single track roller unit whose proximal end portion is closest to the idler supports the track roller on one distal end thereof and rotatably supports the idler on another end thereof. 5. The drive assembly for a track vehicle according to claim 3, wherein the arm of the single track roller unit whose proximal end portion is closest to the idler supports the track roller on one distal end thereof and rotatably supports the idler on another end thereof. 6. The drive assembly for a track vehicle according to claim 1, wherein three double track roller units are interposed between the single track roller units. 7. The drive assembly for a track vehicle according to claim 3, wherein three double track roller units are interposed between the single track roller units. 8. The drive assembly for a track vehicle according to claim 4, wherein three double track roller units are interposed between the single track roller units. 9. The drive assembly for a track vehicle according to claim 5, wherein three double track roller units are interposed between the single track roller units. 10. The drive assembly for a track-type vehicle according to claim 2, wherein three double track roller units are interposed between the single track roller unit. 11. The drive assembly for a track vehicle according to claim 2, wherein a rocking fulcrum of the arm of the single track roller unit and a rocking fulcrum of the first arm of the double track roller unit are disposed closer to the idler than the distal end portions of the arm of the single track roller unit and the first arm of the double track roller unit. 12. The drive assembly for a track vehicle according to claim 2, wherein the arm of the single track roller unit whose proximal end portion is closest to the idler supports the track roller on one distal end thereof and rotatably supports the idler on another end thereof.
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이 특허에 인용된 특허 (14)
Burckhartzmeyer Jerry J. ; Crabb Elmer R. ; Lehnhoff Terry F. ; Watson ; Jr. Alva L., Belted work machine.
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