초록 ▼

Down pressure structure for providing an adjustable down force on a rig of row crop implement such as a cultivator includes an overcenter toggle connected to the rig for pivoting about a toggle axis between a first and second positions. The toggle has a protrusion that contacts the edge of a rig pla

Down pressure structure for providing an adjustable down force on a rig of row crop implement such as a cultivator includes an overcenter toggle connected to the rig for pivoting about a toggle axis between a first and second positions. The toggle has a protrusion that contacts the edge of a rig plate at two different locations corresponding to a light and a heavy down pressure position. A down pressure spring is tensioned between the frame and the toggle and maintains the toggle in a selected one of two overcenter positions corresponding to the two different spring tension positions. A hex projection on the toggle receives a conventional wrench for moving the toggle between the first and second positions. A second toggle and down pressure spring combination provide additional spring adjustments so that at a numerous easily determinable down pressure settings are available.

대표청구항 ▼

In an agricultural rig having a main frame and a linkage pivotally connected to the main frame and extending rearwardly therefrom, rig down pressure structure for providing an adjustable down force on the rig, the down pressure structure comprising: a toggle connected to the rig for pivoting about a

In an agricultural rig having a main frame and a linkage pivotally connected to the main frame and extending rearwardly therefrom, rig down pressure structure for providing an adjustable down force on the rig, the down pressure structure comprising: a toggle connected to the rig for pivoting about a toggle axis between first and second positions; a spring structure tensioned between the main frame and the toggle and having first and second ends, the first end connected to the main frame and the second end connected to the toggle; structure connected to the toggle for moving the toggle between the first and second positions to thereby adjust the tension in the spring; and wherein the toggle includes a protrusion which contacts the rig at two different overcenter locations corresponding to the first and second positions of the toggle.