Patent ID: 9091043
Filing Date: 2015-07-28
Classification: E02F,F16H

Abstract:
1. A forward eight-bar linkage working device for the loading end of a backhoe loader, comprising a front frame, a movable boom, a rotatable bucket oil cylinder, a movable boom oil cylinder, a rotatable bucket lever, a rotatable bucket pull link, a movable boom pull rod, a movable boom lever and a bucket, wherein said frame is hinged with one end of the boom at a point A, hinged with one end of the movable boom pull rod at a point C and hinged with one end of the movable boom oil cylinder at a point E respectively, the other end of said movable boom is hinged with the bucket at a point B, the other end of said movable boom pull rod is hinged with one end of the movable boom lever at a point D, and the other end of said movable boom oil cylinder is hinged at a point F in the middle of the boom; the middle of said movable boom lever is hinged with the movable boom at a point G which is located between the two points A and F; the other end of said movable boom lever is hinged with one end of the rotatable bucket oil cylinder at a point H, the other end of the rotatable bucket oil cylinder is hinged with one end of the rotatable bucket lever at a point I, and the other end of the rotatable bucket lever is hinged with the bucket at a point J; both ends of said rotatable bucket pull link are hinged with the rotatable bucket lever and the movable boom at points K and L respectively, said point K being located between the points I and J, and said point L being located between the points F and B; and the positional relationship among the points of said forward eight-bar linkage mechanism is as follows: taking a reference length as 1, then IK=1, 0.9<AC<1.2, 3.4<AG<3.8, 2<GH<2.4, 6.2<GL<6.8, 2.2<KL<2.5, 2.8<KJ<3.2, 1.6<BJ<1.9, 2.2<BL<2.6, 1.2<DG<1.5, the HI extension length is between 5.04 and 9.3, and the EF extension length is between 5.03 and 8.9.