The invention discloses a torsion beam in a passenger car rear axle assembly, and the torsion beam comprises a beam body and a weld joint; the beam body is a bilaterally symmetrical variable cross-section hollow pipe beam and is formed by cold stamping forming and quenched-tempered heat treatment of a high-strength steel round pipe. The weld joint is located near a circular bead of an upper shellof a rectangular area of a torsion beam port and extends to the waist line position of the upper shell in the length direction, the port area is in a rectangular pipe shape subjected to rounding treatment, and the section structure of the middle area is in an inverted V shape formed by folding a closed curve. According to the invention, the high-strength steel seamless welding circular tube is used as a raw material of the torsion beam, so the production cost is greatly reduced compared with a V-shaped opening beam; the forming quality and the production efficiency of the product are improved;meanwhile, the modeling of the torsion beam is optimized through CAE simulation, so the longitudinal rigidity, the lateral rigidity and the roll rigidity of torsion can be effectively improved, the torsion stress of the torsion beam is effectively reduced, and the fatigue durability is improved.

    本发明公开了一种乘用车后桥总成中的扭力梁,包括梁体和焊缝,所述梁体为左右对称式的变截面空心管梁,由高强钢圆管经过冷冲压成型和调质热处理加工而成,焊缝位于扭力梁端口矩形区上壳体的圆角附近,并沿长度方向延伸至上壳体的腰线位置,所述的端口区为倒圆角处理的矩形管状,中间区的剖面结构呈闭合曲线折叠而成的倒置“V”形,本发明专利采用高强钢无缝焊接圆管作为扭力梁的原材料,生产成本相对于“V”形开口梁大幅降低,并且提高了产品的成型质量和生产效率;同时,本发明专利造型经过CAE仿真优化设计,能有效改善扭力的纵向刚度、侧向刚度和侧倾刚度,有效降低了扭力梁扭转应力,提高了疲劳耐久性能。


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    Titel :

    Torsion beam in passenger vehicle rear axle assembly


    Weitere Titelangaben:

    一种乘用车后桥总成中的扭力梁


    Beteiligte:
    HE YE (Autor:in)

    Erscheinungsdatum :

    2020-11-03


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    IPC:    B60G VEHICLE SUSPENSION ARRANGEMENTS , Radaufhängungen und Federungen für Fahrzeuge



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