Working machine attachment attaching and detaching device

Details Working machine attachment attaching and detaching device Working machine attachment attaching and detaching device

E - Fixed Constructions

02

F

E02F 3/96 (2006.01) E02F 3/36 (2006.01)

Patent

CA 2286529

A structurally simple working machine attachment attaching and detaching device is provided. For this purpose, the device includes a first member (1) rotatable around the forward end of a working machine arm (3) by a hydraulic cylinder (4) and a second member (2) hanging down at the forward end of the first member (1). With respect to a third and fourth cross-pins (P3, P4) each provided in a working machine attachment (5), the third cross-pin (P3) is freely engaged in the vicinity of the basic end of the first member (1), and the fourth cross-pin (P4) is freely engaged at the forward end of the second member (2), the second member (2) including a hook (9A) almost the center of which is connected with a pair of side plates (2R, 2L) each having a recessed portion (8) opening more toward the forward end by a fifth cross-pin (P5), and the hook (9A) being formed almost into an L-shape, divided into an upper portion and a lower portion from the position of the fifth cross-pin (P5). The upper potion is a spindle portion (9u) having a second horizontal through-hole (9H) for inserting a stop pin (P7), the lower portion is a hook body (9d) opening to both the recessed portions (8, 8) side, and the almost L-shape is formed in such a manner that the lower face of the spindle portion (9u) partly protrudes into both the recessed portions (8, 8) and that the hook body (9d) opens to both the recessed portions (8, 8) side while fully opening the apertures of both the recessed portions (8, 8) when the hook (9A) is balanced rotationally around the fifth cross-pin (P5) by its own weight.

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