| CPC E02F 3/3636 (2013.01) [E02F 3/3686 (2013.01)] | 11 Claims |
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1. A working machine comprising:
a movable frame which can be displaced on the ground surface,
a lifting arm mounted on the frame so as to be able to pivot about an axis, referred to as horizontal axis, for an upward and downward displacement of the arm, and
an accessory coupler which can be secured to the free end of the arm by way of a pivot connection having an axis parallel to the pivoting axis of the arm relative to the frame,
wherein said coupler, comprising a plate provided with a through-opening, the plate in the upright state having the overall shape of a U, the space left free between upwardly extending branches of the U forming said through-opening,
wherein the plate has a face, referred to as rear face that faces the arm and is equipped with at least a part of said pivot connection connecting the coupler to the arm, and an opposite face, referred to as front face,
wherein at least part of said pivot connection that connects the coupler to the arm with which the rear face of the plate is equipped, is arranged facing and within said free space between top portions of said upwardly extending opening between the branches of the U of the plate, and
wherein the coupler is provided with a reinforcing element extending from the rear face side of the plate and in that the reinforcing element, which comprises a tubular element, connects the branches of the U to one another, at the free end of the branches of the U and contacts said pivot connection,
wherein the reinforcing element is set back from the through-opening and connected to said rear face of said plate between two opposing gusseted end flanges one each on either of said branches of said U of said plate, said two opposing end flanges having two gussets each, one on either side thereof, and
wherein the pivot connection is in the form of a sleeve secured to said plate by said two opposing end flanges.
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