Cab frame with integrated rollover protective structure

1. A cabin for a mobile machine, comprising:

a floor;

a roof;

at least one A-post located at a leading end relative to a forward travel direction of the mobile machine;

at least one C-post located at a trailing end opposite the at least one A-post, the at least one C-post being curved in at least two orthogonal planes; and

a B-post located between the at least one A-post and the at least one C-post,

wherein:

the B-post and the at least one C-post together define an unobstructed corner viewing area therebetween.

2. The cabin of claim 1 , wherein the unobstructed corner viewing area spans through about 80-110°.

3. The cabin of claim 2 , wherein the at least one A-post and the B-post together define an unobstructed side viewing area therebetween spanning through about 25-35°.

4. The cabin of claim 2 , wherein the at least one A-post includes a first A-post and a second A-post, the first and second A-posts together defining an unobstructed forward viewing area therebetween spanning through about 40-60°.

5. The cabin of claim 1 , wherein the unobstructed corner viewing area is located at only an upper half of the cabin.

6. The cabin of claim 1 , wherein the floor includes a front portion between the at least one A-post and the 8-post and a rear portion between the B-post and the at least one C-post, and the rear portion is recessed by about 40-60 mm.

7. The cabin of claim 1 , wherein a portion of the at least one C-post inclines backwards by about 5-30° relative to a traveling direction of the mobile machine.

8. The cabin of claim 1 , wherein the at least one C-post extends upwardly from the floor along a height direction of the cab and laterally along the roof in a direction orthogonal to the height direction.

9. The cabin of claim 1 , wherein one or more of the B-post and the at least one A-post inclines forward along a vertical axis relative to a traveling direction of the mobile machine, and outward away from the vertical axis.

10. The cabin of claim 1 , wherein the B-post has a generally rectangular axis, and a long side of the B-post is generally aligned with an operator's line of sight from inside the cabin.

11. The cabin of claim 10 , wherein the at least one A-post has a generally rectangular axis, and a long side of the at least one A-post is generally aligned with an operator's line of sight from inside the cabin.

12. The cabin of claim 1 , wherein:

the at least one C-post includes a first C-post and a second C-post connected by at least one cross member;

the first C-post includes a first terminal portion at a first rear corner of the floor;

the second C-post includes a second terminal portion at an opposing second rear corner of the cab; and

the first and second C-posts each include a third terminal portion co-located at a roof of the cab, at a center of a rear edge.

13. The cabin of claim 12 , wherein the first C-post extends from the first terminal portion towards the second C-post at an angle of about 60-70″, and the second C-post extends from the second terminal portion toward the first C-post at an angle of about 60-70°.

14. The cabin of claim 13 , wherein the first C-post intersects the second C-post at a lower half of the cabin.

15. The cabin of claim 1 , wherein the at least one C-post includes:

a straight first section inclining transversely inward relative to a traveling direction of the mobile machine from a first end proximate a bottom rear corner of the cabin to a second end behind a seat of the mobile machine;

a straight second section extending from the second end to a third end proximate the roof, the second section being generally perpendicular to the roof; and

a curved third section extending transversely outward along the roof from the third end to a fourth end proximate a top rear corner of the cabin.

16. The cabin of claim 15 , wherein the third section has a curvature and a width, the curvature of the third portion varying between about 1-4 times the width.

17. A cabin for a mobile machine, comprising:

a floor;

a roof;

at least a first and a second A-post located at a leading end relative to a forward travel direction of the mobile machine, the first and second A-posts together defining an unobstructed forward viewing area therebetween;

at least one C-post located at a trailing end opposite the at least one A-post, wherein the at least one C-post is curved in at least two orthogonal planes; and

a B-post located between the at least one A-post and the at least one C-post, wherein:

the at least one A-post and the 8-post together define an unobstructed side viewing area therebetween;

the B-post and the at least one C-post together define an unobstructed corner viewing area therebetween; and

the unobstructed corner viewing area is larger than the unobstructed side viewing area and larger than the unobstructed forward viewing area.

18. A mobile machine, comprising:

a cab having a floor, a roof, and a ROPS structure, the ROPS structure including:

at least one A-post located at a leading end relative to a forward travel direction of the mobile machine;

at least one C-post located at a trailing end opposite the at least one A-post, the at least one C-post being curved in at least two orthogonal planes; and

the B-post and the at least one C-post together define an unobstructed corner viewing area therebetween.

19. The cabin of claim 18 , further including:

a door located between the B-post and the at least one A-post; and

a corner window located between the B-post and the at least one C-posts, at only the upper portion of the cab.