A work vehicle comprises a vehicle body, a work implement, a track frame, a sprocket, an idler, a plurality of small track rollers, and first and second large track rollers. The track frame comprises opposite first and second end sections, and opposite upper and lower sections. The sprocket and idle
A work vehicle comprises a vehicle body, a work implement, a track frame, a sprocket, an idler, a plurality of small track rollers, and first and second large track rollers. The track frame comprises opposite first and second end sections, and opposite upper and lower sections. The sprocket and idler are rotatably mounted to the first and second end sections, respectively, to movably support an endless track. The small and large track rollers are rotatably mounted to the lower section between the sprocket and idler and are unmovable in vertical and horizontal directions of the track frame. The small track rollers are all disposed between the first and second large track rollers. Each small track roller defines a respective small track rolling surface having a respective first tread diameter and each large track roller defines a respective large track rolling surface having a respective second tread diameter greater than each respective first tread diameter.
대표청구항▼
1. A work vehicle comprising: a vehicle body;a work implement;a track frame comprising a first end section, a second end section opposite the first end section, an upper section and a lower section opposite the upper section;a sprocket rotatably mounted to the first end section of the track frame;an
1. A work vehicle comprising: a vehicle body;a work implement;a track frame comprising a first end section, a second end section opposite the first end section, an upper section and a lower section opposite the upper section;a sprocket rotatably mounted to the first end section of the track frame;an idler rotatably mounted to the second end section of the track frame, the sprocket and the idler being configured to movably support an endless track that passes about the sprocket and the idler;a plurality of small track rollers configured to guide the endless track, each including a respective small track roller shell rotatably mounted to the lower section of the track frame between the sprocket and the idler by a respective small track roller support shaft that is fixedly mounted to the track frame, such that the small track rollers are unmovable in vertical and horizontal directions with respect to the track frame; andfirst and second large track rollers configured to guide the endless track, each including a respective large track roller shell rotatably mounted to the lower section of the track frame between the sprocket and the idler by a respective large track roller support shaft that is fixedly mounted to the track frame, such that the first and second large track rollers are unmovable in the vertical and horizontal directions with respect to the track frame with all of the small track rollers being disposed between the first and second large track rollers, each of the small track rollers defining a respective small track rolling surface having a respective first tread diameter and each of the large track rollers defining a respective large track rolling surface having a respective second tread diameter that is greater than the respective first tread diameter of each of the small track rollers, and each of the small track rolling surfaces and each of the large track rolling surfaces are substantially aligned along a track guide line that extends tangentially to each of the small track rolling surfaces and each of the large track rolling surfaces such that the small and large track rollers are configured to guide the endless track along the track guide line. 2. The work vehicle according to claim 1, wherein a respective longitudinal central axis of each of the respective small track roller support shafts is vertically offset from a respective longitudinal central axis of each of the respective large track roller support shafts in a direction extending between the upper and lower sections. 3. The work vehicle according to claim 2, wherein each of the large track roller support shafts is mounted closer to the upper section than any of the small track roller support shafts. 4. The work vehicle according to claim 1, wherein each of the respective small track roller support shafts has a respective longitudinal central axis aligned along a first track frame longitudinal direction that extends longitudinally between the first and second end sections. 5. The work vehicle according to claim 1, wherein each of the respective large track roller support shafts has a respective longitudinal central axis aligned along a second track frame longitudinal direction that extends longitudinally between the first and second end sections. 6. The work vehicle according to claim 1, wherein the small and large track rollers are rotatably drivable by the sprocket via the endless track while guiding the endless track along the track guide line. 7. The work vehicle according to claim 1, wherein each of the small track rollers includes a pair of small thrust bushings mounted over the respective small track roller support shaft between the respective small track roller support shaft and the respective small track roller shell, each of the small thrust bushings including a small annular flange having a small annular flange surface that contacts a respective end of the respective small track roller shell, the small annular flange surface having a first surface area; andeach of the large track rollers includes a pair of large thrust bushings mounted over the respective large track roller support shaft between the respective large track roller support shaft and the respective large track roller shell, each of the large thrust bushings including a large annular flange having a large annular flange surface that contacts a respective end of the respective large track roller shell, the large annular flange surface having a second surface area greater than the first surface area. 8. The work vehicle according to claim 1, wherein the plurality of small track rollers includes at least one single flange small track roller and at least one double flange small track roller. 9. The work vehicle according to claim 8, wherein the double flange small track roller is positioned next to the first large track roller and the single flange small track roller is positioned next to the second large track roller. 10. The work vehicle according to claim 9, wherein the first large track roller is positioned closest to the sprocket and the second large track roller is positioned closest to the idler. 11. The work vehicle according to claim 1, further comprising a mounting assembly configured to mount the small track rollers and the large track rollers to the lower section of the track frame. 12. The work vehicle according to claim 11, wherein the mounting assembly includes a plurality of first mounting assemblies and a plurality of second mounting assemblies, each of the first mounting assemblies being configured to mount a respective one of the small track rollers to the lower section of the track frame and each of the second mounting assemblies being configured to mount a respective one of the large track rollers to the lower section of the track frame. 13. The work vehicle according to claim 12, wherein each of the first mounting assemblies includes a first mounting arrangement configured to nonrotatably mount a respective small track roller support shaft to the lower section of the track frame; andeach of the second mounting assemblies includes a second mounting arrangement configured to nonrotatably mount a respective large track roller support shaft to the lower section of the track frame. 14. The work vehicle according to claim 13, wherein each of the respective small track roller support shafts has a uniform diameter. 15. The work vehicle according to claim 14, wherein each of the first mounting assemblies further includes a first collar assembly that is configured to surround the small track roller support shaft and mount the small track roller support shaft to the first mounting arrangement. 16. The work vehicle according to claim 13, wherein each of the respective large track roller support shafts has a large diameter portion having a large diameter and a modified diameter portion, the large and modified diameter portions forming a recessed area configured to accommodate a portion of the second mounting arrangement while the large track roller support shaft is mounted to the second mounting arrangement. 17. The work vehicle according to claim 16, wherein each of the second mounting assemblies further includes a second collar assembly that is configured to partially surround the large track roller support shaft and mount the large track roller support shaft to the second mounting arrangement. 18. A work vehicle according to claim 1, further comprising another sprocket, another idler, another plurality of small track rollers and another set of first and second large track rollers, such that the sprocket, the idler, the plurality of small track rollers and the first and second large track rollers are mounted to a first side of the track frame, and the another sprocket, the another idler, the another plurality of small track rollers and the another set of first and second large track rollers are mounted to a second side of the track frame opposite the first side.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (9)
Wodrich, Timothy D., Bogie undercarriage design with rigidly mounted track roller.
Michael D. Hasselbusch ; Roy L. Maguire, Carrier roller assembly of an undercarriage assembly of a work machine having a roller shaft with integrated thurst surfaces.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.