Rotary rod weeder attachment for grain planting drills and the like
阅读：934发布：2020-11-21
专利汇可以提供Rotary rod weeder attachment for grain planting drills and the like专利检索，专利查询，专利分析的服务。并且This is a rotary rod weeder attachment for farm planters which is particularly designed to prepare the seed bed immediately ahead of the disc openers on the planting drill. This rod weeder is vertically adjustable and releases in a vertical direction upon impact with imbedded obstructions in the field.，下面是Rotary rod weeder attachment for grain planting drills and the like专利的具体信息内容。
1. A rotary rod weeder attachment adapted for mounting upon a wheeled vehicle chassis and comprising a frame means, a plurality of elongated vertical strut members each having an elongated axis extending along said elongated dimension, said struts being mounted for rockable substantially axially up and down vertical movement on said frame means, and strut mounting means securing said strut members to said frame means and to said vehicle chassis, a. a rotatable weeder rod journaled at the lower ends of said strut members and supported thereby, b. rotary driving means connected with said weeder rod for driving the same, c. spring means for normally holding said strut members in downwardly projected operative position but yielding upon impact against the rod or strut members to accommodate retraction thereof in response to unyielding impact, d. said strut mounting means comprising a bell crank supporting structure at the upper end thereof with angularly disposed arms extending rearwardly from a first pivot point and with said supporting structure being pivotally mounted at the top of said strut members with yieldable spring means for normally yieldably holding said strut members in downwardly projected operative position, and stabilizing arms disposed intermediate the ends of said strut members and in substantially parallel relation to said bell crank supporting structure and being pivotally coupled to said strut members and to said frame means at a second pivot point spaced from said first pivot point to produce a parallelogram support structure for each of said strut members and thus produce substantially vertical rockable up and down movement thereof about said spaced first and second pivot points against the force of impact by the forward surfaces of said strut members and rod against an unyielding obstruction in the ground being weeded.
2. The structure set forth in claim 1 and adjusting means for varying the elevation of the downwardly projected position of said strut members and said rotary rod.
3. The structure set forth in claim 1 and the rod driving means including a reversing mechanism for rotating said rod axially in a direction opposite to the direction of rotation of the wheels of the vehicle.
4. The structure set forth in claim 3 and said reversing mechanism including a pair of spaced-apart driving sprockets with a reversing sprocket interposed therebetween, the reversing sprocket engaging the driving chain on the opposite side thereof from said spaced-apart sprocket wheels, and a chain and sprocket drive connected with said reversing sprocket and connected to said rod for driving the same.
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