Spring rockflex bearing arm
First Claim
1. A disc harrow comprising a frame, a disc gang having a gang shaft having a plurality of ground engaging discs centrally mounted on said shaft, and a support assembly for supporting said disc gang from said frame, said support assembly comprising:
- a) a first structural member having an upper end and a lower end, said upper end attached to said frame and said lower end remote from said frame;
b) a second structural member having a first end portion and a second end portion, said first end portion pivotally attached to said lower end of said first structural member, said second end portion having bearing means for rotatably supporting said gang shaft, said second structural member having a longitudinal axis between said first end portion and said second end portion, said second structural member operable to vertically pivot;
c) resilient means having an upper and lower end, said upper end pivotally attached to said upper end of said first structural member and said lower end pivotally attached to said second structural member, said resilient means operable to resist vertical pivoting of said second structural member;
d) wherein said second end portion is rotatably connected to said first end portion by rotational means to permit said second end portion to rotate with reference to said first end portion about said longitudinal axis of said second structural member in response to angular movement of said gang shaft due to impact of said disc gang with an obstacle.
2 Assignments
0 Petitions
Accused Products
Abstract
A disc harrow has a frame and a plurality of earth working discs. Each disc has a central aperture for attachment to a gang shaft. A mount attaches the gang shaft to the underside of the frame and has bearings to permit rotation of the shaft in response to forward movement of the disc harrow. The mount includes a first structural member, a second structural member and a resilient spring connected between the two members. In operation, upon striking of an obstacle by the discs, the gang shaft is permitted to upwardly deflect by the mount to prevent damage to the disc harrow. The second structural member has first and second portions with aligned longitudinal axes. The first and second portions are rotationally connected to permit rotation of the second portion in response to an angular moment applied to the second portion by deflection of the gang shaft. The rotational connection permits the bearing to automatically maintain a preferred alignment with the gang shaft during deflection, thereby preventing damage to the bearing.
39 Citations
14 Claims
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1. A disc harrow comprising a frame, a disc gang having a gang shaft having a plurality of ground engaging discs centrally mounted on said shaft, and a support assembly for supporting said disc gang from said frame, said support assembly comprising:
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a) a first structural member having an upper end and a lower end, said upper end attached to said frame and said lower end remote from said frame;
b) a second structural member having a first end portion and a second end portion, said first end portion pivotally attached to said lower end of said first structural member, said second end portion having bearing means for rotatably supporting said gang shaft, said second structural member having a longitudinal axis between said first end portion and said second end portion, said second structural member operable to vertically pivot;
c) resilient means having an upper and lower end, said upper end pivotally attached to said upper end of said first structural member and said lower end pivotally attached to said second structural member, said resilient means operable to resist vertical pivoting of said second structural member;
d) wherein said second end portion is rotatably connected to said first end portion by rotational means to permit said second end portion to rotate with reference to said first end portion about said longitudinal axis of said second structural member in response to angular movement of said gang shaft due to impact of said disc gang with an obstacle. - View Dependent Claims (2, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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- 3. The disc harrow of claim a 1, wherein said resilient means comprises a helical spring.
Specification