초록 ▼

An agricultural planter is provided with forwardly folding wing members that allow conversion of the planter from a laterally extending operating position to a compact transport position. To increase stability for the planter, the draw bar telescopes as the wing members are folded forwardly into the

An agricultural planter is provided with forwardly folding wing members that allow conversion of the planter from a laterally extending operating position to a compact transport position. To increase stability for the planter, the draw bar telescopes as the wing members are folded forwardly into the transport position. Brace members interconnect a forward portion of the draw bar and the wing members. As the wing members fold forwardly, the brace members are arranged to cause a rearward portion of the draw bar to extend rearwardly from the forward portion and effect the telescopic action in the draw bar. A draw bar hitch lock linkage is provided to keep the draw bar compacted when the wing members are in the operating position. A hitch lock actuator is tied into the hydraulic system for the movement of the wing members into the transport position to permit the telescopic action of the draw bar in concert with the forward folding of the wing members.

대표청구항 ▼

[ Having thus described the invention, what is claimed is:] [1.]1. In an agricultural implement supporting ground working devices, said agricultural implement having a draw bar adapted for connection to a prime mover; and a tool bar connected to said draw bar and including left and right wing member

[ Having thus described the invention, what is claimed is:] [1.]1. In an agricultural implement supporting ground working devices, said agricultural implement having a draw bar adapted for connection to a prime mover; and a tool bar connected to said draw bar and including left and right wing members pivotally movable about a wing pivot axis relative to said draw bar, each of said wing members being movable between a laterally extending operating position and a forwardly folded sport position, the improvement comprising:said draw bar including a hitch latch mechanism for restricting the telescopic movement of said draw bar when said wing members are oriented in said laterally extending operating position, said draw bar having a forward portion adapted for connection to said prime mover and a rearward portion telescopically received within said forward portion; andan actuating mechanism including a brace interconnecting each respective said wing member with said forward portion of said draw bar such that the forward folding of said wing members extends said rearward portion of said draw bar from said forward portion, said actuating mechanism operatively connecting said wing members with said draw bar such that the forward folding of said wing members to said transport position effects a telescopic movement of said draw bar;wherein said wing members are moved between said operating and transport positions by first hydraulic actuators, said hitch latch mechanism being actuated by a second hydraulic actuator, said first and second hydraulic actuators being connected to a hydraulic circuit that effects an unlatching of said hitch latch mechanism before initiating the movement of said wing members toward said transport position.