Machine suspension system having torsion axle assemblies
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
D62D-055/08
출원번호
US-0837096
(2010-07-15)
등록번호
US-8360179
(2013-01-29)
발명자
/ 주소
Daniels, Christopher E.
Freberg, Michael S.
출원인 / 주소
Caterpillar Inc.
인용정보
피인용 횟수 :
2인용 특허 :
17
초록▼
A suspension system for a machine is disclosed. The suspension system may have a front torsion axle assembly with a first arm connected at a first end to a first shaft, and a first axle connected to a second end of the first arm. The suspension system may also have a rear torsion axle assembly with
A suspension system for a machine is disclosed. The suspension system may have a front torsion axle assembly with a first arm connected at a first end to a first shaft, and a first axle connected to a second end of the first arm. The suspension system may also have a rear torsion axle assembly with a second arm connected at a first end to a second shaft, and a second axle connected to a second end of the second arm. The suspension system may further have a frame connected to an end of the first shaft and an end of the second shaft. The second ends of the first and second arms are oriented within common angular quadrants defined by a coordinate system having an axis passing through the first ends of the first and second arms and aligned with a travel direction of the machine.
대표청구항▼
1. A suspension system for a machine, comprising: a front torsion axle assembly having a first shaft, a first arm connected at a first end to the first shaft, and a first axle connected to a second end of the first arm and extending from the first arm in a direction opposite the first shaft;a rear t
1. A suspension system for a machine, comprising: a front torsion axle assembly having a first shaft, a first arm connected at a first end to the first shaft, and a first axle connected to a second end of the first arm and extending from the first arm in a direction opposite the first shaft;a rear torsion axle assembly having a second shaft, a second arm connected at a first end to the second shaft, and a second axle connected to a second end of the second arm and extending from the second arm in a direction opposite the second shaft, anda frame configured to support an engine and being connected to an end of the first shaft and an end of the second shaft;an undercarriage connected to an end of the first axle and an end of the second axle;a traction device supported by the undercarriage and driven by the engine;a first bearing connected to the undercarriage and configured to receive the first axle; anda second bearing connected to the undercarriage and configured to receive the second axle;wherein the second ends of the first and second arms are oriented within common angular quadrants defined by a coordinate system having an axis passing through the first ends of the first and second arms and aligned with a travel direction of the machine;the first and second axles are located further away from an engagement of the traction device with a ground surface than the first and second shafts; andthe first and second bearings are different types of bearings. 2. The suspension system of claim 1, wherein: the engine is located toward a rear end of the machine;the machine includes a work tool located toward a front end of the machine; andthe first and second axles are located further away from the front end of the machine than the first and second shafts. 3. The suspension system of claim 1, wherein the common angular quadrants each include a counterclockwise angular range of between 90 and 180 degrees when measured from a forward traveling direction of the machine. 4. The suspension system of claim 3, wherein the second ends of the first and second arms are oriented in a range of between about 120-150 degrees relative to the coordinate axis when measured from a forward traveling direction of the machine. 5. The suspension system of claim 1, wherein the first and second torsion axle assemblies are substantially parallel. 6. The suspension system of claim 1, wherein the first and second arms are substantially identical, and the first and second shafts are substantially identical. 7. The suspension system of claim 6, wherein the first and second axles have different lengths. 8. The suspension system of claim 1, wherein the first bearing is a sleeve bearing and the second bearing is a spherical roller bearing. 9. The suspension system of claim 8, further including a sprocket mounted on the undercarriage and powered by the engine to drive the traction device, wherein the sprocket is located between the spherical roller bearing and the sleeve bearing. 10. A suspension system for a machine, comprising: an undercarriage;a sprocket mounted on the undercarriage;a traction device supported by the undercarriage and driven by the sprocket;a first torsion axle assembly;a sleeve bearing located at a first end of the undercarriage and configured to slidingly receive a first end of the first torsion axle assembly;a second torsion axle assembly; anda roller bearing located at a second end of the undercarriage and configured to rotatably receive a first end of the second torsion axle assembly, wherein the sprocket is located in a fore/aft machine direction between the roller bearing and the sleeve bearing. 11. The suspension system of claim 10, wherein: the undercarriage includes a rear frame extending in a length direction and supporting a plurality of rollers;the sleeve bearing is mounted on an upper surface of the rear frame;the undercarriage includes a mounting flange connecting the sprocket to the rear frame; andthe roller bearing in mounted in the mounting flange. 12. The suspension system of claim 10, wherein: each of the first and second torsion axle assemblies includes a shaft, an arm connected at a first end to the shaft, and an axle connected to a second end of the arm; andthe arm of the first torsion axle assembly is generally parallel to the arm of the second torsion axle assembly. 13. The suspension system of claim 12, wherein; the first and second torsion axle assemblies have substantially identical shafts and arms; andthe axle of the first torsion axle assembly has a length different than a length of the axle of the second torsion axle assembly. 14. The suspension system of claim 10, wherein the traction device includes an endless track. 15. The suspension system of claim 10, further including a frame configured to support an engine that powers the sprocket, wherein: the first torsion axle assembly is rigidly connected at a second end to the frame, andthe second torsion axle assembly is rigidly connected at a second end to the frame. 16. The suspension system of claim 15, wherein the frame is configured to pivot under load about the first and second torsion axle assemblies. 17. The suspension system of claim 16, wherein the frame is configured to pivot rearward toward the roller bearing and downward toward a ground surface during loading. 18. A machine, comprising an engine;a frame configured to support the engine;a work tool;an extension arm connected between the frame and the work tool;an undercarriage having a sprocket powered by the engine;an endless track supported by the undercarriage and driven by the sprocket;a front torsion axle assembly having a first shaft rigidly connected to the frame, a first arm connected at a first end to the first shaft, and a first axle connected to a second end of the first arm and extending from the first arm in a direction opposite the first shaft to the undercarriage;a sleeve bearing located at a front end of the undercarriage and configured to slidingly receive the first axle;a rear torsion axle assembly having a second shaft rigidly connected to the frame, a second arm connected at a first end to the second shaft, and a second axle connected to a second end of the second arm and extending from the second arm in a direction opposite the second shaft to the undercarriage; anda roller bearing located at a rear end of the undercarriage and configured to rotatably receive the second axle,wherein:the sprocket is located in a fore/aft machine direction between the roller bearing and the sleeve bearing; andthe first and second arms are oriented within common angular quadrants having coordinate axis passing through the first ends of the first and second arms and aligned with the fore/aft machine direction.
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