Improved Design Analysis of The Arm Bracket of a Heavy-Duty Tow and Hang Separation Type of Wrecker

Aiming at the problem of the fracture of the swing arm of a heavy-duty tow and hang separation type of wrecker, an improved design scheme for the reinforcement of the basic arm and swing arm beam structure is proposed. The finite element model of the arm bracket structure before and after the improvement was established, and the three working conditions of full shrinkage, semi-extension and full extension were selected. The maximum lift weight under different amplitude angles was selected as typical working conditions for checking calculation. On this basis, a comparative analysis of the structural strength of the arm bracket is carried out. The results show that the maximum stress of the arm bracket is reduced by 27.86 MPa after the improvement, and the stress distribution of some components is obviously improved.