《汽车设计教学课件》第五章 驱动桥设计_驱动桥壳设计yj.pptVIP

第六节 驱动桥壳设计(Design of drive axle housing) 驱动桥壳应满足如下设计要求(The drive axle housing should meet the following design requirements)： 1）应力具有足够的强度和刚度(一般要求最大变形不超过1.5mm/1m轮距)，以保证主减速齿轮啮合正常并不使半轴产生附加弯曲应力(Stress should has enough strength and stiffness (In general, the maximum deformation should not exceed 1.5mm/1m of wheel track), to ensure the final drive gear does not generate additional bending stress in normal condition)。 2) 保证强度和刚度的前提下，尽量减小质量以提高行驶平顺性(Reduce the weight to improve the ride comfort while remaining enough strength and stiffness)。 3) 保证足够的离地间隙(Ensure adequate ground clearance)。 4) 结构工艺性好，成本低(Structure manufacturability is good, low cost)。 5) 保护装于其上的传动系部件和防止泥水浸入(Protect the drive train components and prevent muddy water immersing)。 6) 拆装、调整、维修保养力便(Disassembly, adjustment and maintenance should be convenient)。 一、驱动桥壳结构方案分析(Analysis of the drive axle housing structure) 驱动桥壳大致可分为可分式、整体式和组合式三种形式。(The drive axle housing can be generally divided into three types: trumpet-type axle housing, banjo housing and unitized carrier-type axle housing) 1．可分式桥壳(Trumpet-type axle housing)：由一个垂直接合面分为左右两部分。两部分通过螺栓联接成—体。每—部分均由—个铸造壳体和一个压入其外端的半轴套管组成，轴管与壳体用铆钉连接。 结构简单、制造工艺性好，主减速器支承刚度好(Simple structure, good manufacturability, support the final drive stiffly)。 但拆装、调整、维修很不方便，桥壳的强度和刚度受结构的限制，曾用于轻型汽上，现己较少使用。(It has been used on light vehicles, but is not so popular now because of the inconvenience of disassembly, adjustment and maintenance. The strength and stiffness of the axle housing is also limited by the structure) 2．整体式桥壳(banjo housing) 整个桥壳是一根空心梁，桥壳和主减速器壳为两体(The entire axle housing is a hollow beam. The axle housing and the final drive housing are two components)。 强度和刚度较大，主减速器拆装、调整方便(It is strong and stiff, and the final drive is removable and easy to adjust)。 整体式桥壳分为铸造式、钢板冲压焊接式和扩张成形式三种。(The banjo housing is divided into three types: casting, stamping steel welded and expansion forming.) 铸造式桥壳：强度和刚度较大，但质量大，加工面多，制造工艺复杂，主要用于中、重型货车上 Casting housing: The Strength and stiffness are h