Milling machine having pivot arms offset from engine output shaft
A milling machine may include a frame. The milling machine may include a first wheel and a second wheel connected to a first end of the frame, and a third wheel connected to a second end of the frame. The milling machine may include a first leg, a second leg, and a third leg connecting the frame and the first wheel, the second wheel, and the third wheel, respectively. The milling machine may include a pair of arms pivotably connected to opposite sides of the frame. The milling machine may have a milling drum rotatably connected to the arms with a rotational axis parallel to the pivot axis. Further, the milling machine may have an engine that rotates the milling drum via a transmission. An output shaft of the engine positioned transverse to the frame may have an output shaft axis spaced apart from the pivot axis of the arms.
1. A milling machine, comprising:
a frame extending from a first end to a second end along a longitudinal direction;
a first wheel and a second wheel connected to the first end of the frame;
a third wheel connected to the second end of the frame;
a first leg connecting the frame and the first wheel;
a second leg connecting the frame and the second wheel;
a third leg connecting the frame and the third wheel;
a pair of arms pivotably connected to opposite sides of the frame, the arms having a pivot axis disposed transverse to the longitudinal direction of the frame;
a milling drum rotatably connected to free ends of the pair of arms, a rotational axis of the milling drum being disposed generally parallel to the pivot axis;
an engine configured to rotate the milling drum via a transmission, the engine having an output shaft positioned generally transverse to the frame, the output shaft having an output shaft axis disposed spaced apart from the pivot axis of the arms;
wherein the pivot axis is disposed between the output shaft axis and the rotational axis of the milling drum along a travel direction of the machine.
2. The milling machine of claim 1 , wherein the output shaft axis is disposed generally parallel to the pivot axis of the arms.
3. The milling machine of claim 1 , wherein the output shaft is disposed generally inclined relative to the pivot axis of the arms.
4. The milling machine of claim 1 , wherein the arms extend in a direction from a rear of the milling machine towards a front of the milling machine.
5. The milling machine of claim 1 , further including an arm bearing attached to the frame and configured to support a shaft associated with one of the arms.
6. The milling machine of claim 1 , wherein the pivot axis is positioned at a first height relative to the frame, and the output shaft axis is positioned at a second height relative to the frame.
7. The milling machine of claim 6 , wherein the first height is smaller than the second height.
8. The milling machine of claim 6 , wherein the first height is larger than the second height.
9. The milling machine of claim 1 , wherein the transmission includes:
an engine-driven pulley connected to the output shaft of the engine;
a drum pulley connected to the milling drum; and
at least one belt connecting the engine-driven pulley and the drum pulley.
10. The milling machine of claim 9 , wherein one of the pair of arms includes a transmission casing that encloses the engine-driven pulley, the drum pulley, and the at least one belt.
11. The milling machine of claim 1 , further including an operator platform disposed between the first end and the second end of the frame, the operator platform being configured to be movable from adjacent a first side of the frame to a second side of the frame.
12. The milling machine of claim 1 , wherein at least one of the first leg, the second leg, or the third leg, includes:
an upper section connected to the frame;
a lower section connected to a respective one of the first, second, or third wheel, the upper and lower sections being movable relative to each other; and
an actuator connected at one end to the frame and at an opposite end to the lower section.
13. The milling machine of claim 1 , further including
a cross tube connecting the pair of arms; and
at least one arm actuator connected at one end to the frame and at an opposite end to the cross tube.
14. A milling machine, comprising:
a frame extending from a front end to a rear end along a longitudinal direction;
a left front wheel disposed adjacent the front end of the frame;
a right front wheel disposed adjacent the front end and spaced apart from the left front wheel;
a left rear wheel disposed adjacent the rear end of the frame;
a right rear wheel disposed adjacent the rear end and spaced apart from the left rear wheel;
a left front leg connecting the frame and the left front wheel;
a right front leg connecting the frame and the right front wheel;
a left rear leg connecting the frame and the left rear wheel;
a right rear leg connecting the frame the right rear wheel;
a left arm pivotably connected to the frame and extending from the frame towards the front end of the frame;
a right arm pivotably connected to the frame and extending from the frame towards the front end of the frame, the left arm and the right arm having a pivot axis disposed transverse to the longitudinal direction of the frame;
a cross tube connecting the left arm and the right arm;
at least one arm actuator connecting the frame and the cross tube;
a milling drum rotatably connected to free ends of the left and right arms;
an engine disposed transverse to the frame and having an output shaft configured to rotate the milling drum via a belt drive, an output shaft axis of the output shaft being disposed parallel to and spaced apart from the pivot axis;
wherein the pivot axis is disposed between the output shaft axis and a rotational axis of the milling drum along a travel direction of the machine.
15. The milling machine of claim 14 , wherein the belt drive is disposed on one side of the frame and includes:
an engine-driven pulley connected to the output shaft of the engine;
a drum pulley connected to the milling drum; and
at least one belt connecting the engine-driven pulley and the drum pulley.
16. The milling machine of claim 14 , further including an operator platform disposed between the front end and the rear end of the frame, the operator platform being configured to be movable from adjacent a first side of the frame to a second side of the frame.
17. The milling machine of claim 14 , wherein the pivot axis is positioned at a first height relative to the frame, and the output shaft axis is positioned at a second height relative to the frame.
18. The milling machine of claim 17 , wherein the first height is smaller than the second height.
19. The milling machine of claim 17 , wherein the first height is larger than the second height.
20. The milling machine of claim 14 , further including an arm bearing attached to the frame and configured to support a shaft associated with one of the arms.