초록 ▼

A grain drill suspension system including a support member comprising a parallelogram link structure and a walking beam member. The walking beam member has furrow cutting discs attached to a front portion thereof and a press wheel attached to a rear portion thereof. The support member includes paral

A grain drill suspension system including a support member comprising a parallelogram link structure and a walking beam member. The walking beam member has furrow cutting discs attached to a front portion thereof and a press wheel attached to a rear portion thereof. The support member includes parallel vertical members and cross links. The walking beam is pivotally connected at a medial portion thereof to a rear vertical member of the parallelogram structure. A front vertical member is attached to a vertically adjustable attachment member associated with the suspension system. A first spring extends upwardly from a rear portion of the walking beam to the rear vertical member biasing the furrow cutting discs downwardly. A second spring cooperates with the front vertical member and the cross links resiliently urging the rear vertical member and walking beam downwardly. The springs, along with the position of the front vertical member, cooperate to determine the depth of the furrow cut by the furrow discs. The parallelogram support structure allows the furrow cutting discs to follow undulating terrain while maintaining a constant desired depth of the furrow.

대표청구항 ▼

A grain drill suspension system adapted to be attached to a prime mover for transferring a seed planter employing said suspension system across a field, said suspension comprising: (a) a mounting bracket for attaching said suspension system to the prime mover; (b) a parallel link structure attached

A grain drill suspension system adapted to be attached to a prime mover for transferring a seed planter employing said suspension system across a field, said suspension comprising: (a) a mounting bracket for attaching said suspension system to the prime mover; (b) a parallel link structure attached to said mounting bracket and having parallel front and rear vertical members and parallel upper and lower cross links pivotally connected at extremities thereof to said front and rear vertical members; said front vertical member being attached to said mounting bracket; and said rear vertical member including a lower portion extending below said lower cross link; (c) an elongate walking beam having front, rear and medial portions thereof; said walking beam being pivotally attached to said rear vertical member lower portion along said walking beam medial portion; (d) a furrow cutting member being mounted on said walking beam front portion and adapted to be engageable with a soil surface for cutting a furrow therein; (e) a furrow closing member being mounted on said walking beam rear portion and adapted to be engageable with the furrow for closing and packing same; (f) a seed depositing member being retained between said furrow cutting and furrow closing members and adapted to deposit a succession of seeds into the furrow; (g) said upper and lower cross links comprising respective horizontally spaced pairs of upper and lower cross links; and means spacing said pairs of links sufficiently to allow said furrow cutting member to translate upwardly therebetween; and (h) a stop plate being attached to and extending upwardly from said walking beam medial portion; said stop plate engaging said parallel link structure at the pivotal connection between said rear vertical member and said pair of lower cross links upon rotation of said walking beam relative to said vertical member when said furrow cutting member is being urged downwardly so as to limit pivotal movement of said walking beam relative to said parallel link structure, thereby limiting to a controlled depth of the furrow cut by said furrow cutting member.