Fork lug assembling assembly and assembling method thereof

Abstract

The invention relates to a fork lug assembling assembly and an assembling method thereof. The fork lug assembling assembly comprises a fork lug, a convex shoulder lining, a connected piece, a lining, a bolt and a nut. The fork lug is provided with two lug pieces which are oppositely arranged in parallel, and coaxial through holes are formed in the two lug pieces respectively. The convex shoulder lining is assembled with one of the through holes in an interference fit manner, the lining is assembled with the other through hole in a clearance fit manner, the connected piece is clamped between the convex shoulder lining and the lining, the bolt sequentially penetrates through the convex shoulder lining, the connected piece and the center of the lining, and the free end of the bolt is screwed and fixed with the nut in a threaded fit manner; when the convex shoulder lining, the connected piece and the lining are sequentially assembled and are in a free state, a recess exists between the convex shoulder lining and the outer end face of the through hole, meanwhile, the lining is higher than the outer end face of the corresponding through hole, and when the nut is screwed, generated pre-tightening force does not directly act on the fork lug, so that the fork lug is prevented from being subjected to torque, and abrasion is avoided; and meanwhile, assembling gaps are avoided, and the fatigue life is prolonged.

Description

technical field [0001] The invention belongs to the technical field of mechanical design, and in particular relates to a fork lug assembly assembly and an assembly method thereof. Background technique [0002] There are fork lug structures in ordinary machinery and aircraft, such as the rod end bearings of struts, swing rods, and damping rods are connected to the fork lugs through bolts, and the common fork lug assembly has the following defects: [0003] 1) if figure 1 As shown in , the pre-tightening force of the bolt acts directly on the fork ear, so that the fork ear is subjected to torque, the outer side of the fork ear is subjected to tensile stress, and the inner side of the fork ear is subjected to compressive stress; 2) as figure 2 As shown, the pre-tightening force of the bolt directly acts on the fork lug, causing the fork lug to retract and produce a shape change, which directly leads to the deterioration of the coaxiality and straightness of the through hole o...

AI Technical Summary

Problems solved by technology

[0003] 1) if figure 1 As shown in , the pre-tightening force of the bolt acts directly on the fork ear, so that the fork ear is subjected to torque, the outer side of the fork ear is subjected to tensile stress, and the inner side of the fork ear is subjected to compressive stress; 2) as figure 2 As shown, the pre-tightening force of the bolt directly acts on the fork lug, causing the fork lug to retract and produce a shape change, which directly leads to the deterioration of the coaxiality and straightness of the through hole of the fork lug, resulting in eccentric wear of the through hole. Accelerate the wear of the holes and bolts; it may also cause interference between the bolts and the through holes of the fork lugs, resulting in assembly stress and more serious damage; 3) In addition, if figure 1 As shown in the figure, when the ordinary fork lug is in a free state without bolts tightened, there is a gap C between the bushing and the connected part. After the bolts are tightened, the axial assembly force is large enough to eliminate the gap C. However, if the fork lugs are deformed, such as figure 2 As shown, there may be partial contact between the bush and the connected part, resulting in a wedge-shaped gap, causing the part to be eccentrically worn; when the axial assembly force is small, the gap C cannot be eliminated, and free movement will also occur. question

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