请求帮忙翻译（以汽车驱动桥有关），万分感谢！

arbox007

不用全部翻译，翻译前面几段就好了，万分感谢！

arbox007

This invention relates,to vehicle drive axles, more particularly for heavy duty vehicles, and has for its general object and purpose to provide a drive axle assembly with standardized gear and axle bowl structures, which can be easily and quickly converted for use in single or dual motor driven vehicles.
The application of dual drive rear axles to heavy duty vehicles having a legally permissible maximum overall width of ninety-six inches has heretofore been found quite expensive and attended with difficulties mainly due to space limitations. In such dual drive axles each motor may drive an opposite side of the axle necessitating a double bowl, axle structure, or both motors may drive through a differential located in a common axle bowl. For many purposes a double bowl axle has been considered desirable but prior designs have proved so bulky that, in order to observe the legal restrictions on vehicle width, a single bowl axle had to be used.  Furthermore prior dual drive axles designs were Invariably expensive and of such special construction that they could not also be adapted to the single drive type of axle in which the single propeller or drive shaft is operatively connected with the two wheel axle shafts by conventional differential gearing mounted within the housing.
Therefore, it is a major object of my present invention to provide an axle housing structure for alternative use in either single or dual drive axles which is of such construction and dimensions that when employed in a dual motor drive vehicle,individual axle bowls are satisfactorily mounted within the overall legal vehicle width and disposed for the most effective transmission of power to the individual drive wheel of the assembly.
A more particular object of the invention resides in the provision of a novel ring gear carrier journaled within an axle bowl together with two axle shaft driving means interchangeably connectible with said ring gear carrier for selectively establishing a differential driving connection between said carrier and two opposite wheel driving axle shafts, or a direct driving connection between said carrier and a single one of the wheel driving shafts.
It is a further object of the invention to provide a novel axle bowl of minimum diameter and axial length with means for mounting the gearing of the required ratio therein for either single or dual motor drive, and insuring maximum operating efficiency in the transmission of the driving power to the vehicle wheels.
It is an additional object of the invention to provide an axle bowl and axle driving unit mounted therein in novel assembly, the several parts of which are standardised for use in either a single or dual drive axle assembly so that by such interchangeability it is necessary to stock only a comparatively small number of parks for replacement or servicing of bath types of axles.
It is further the aim and purpose of the present invention to provide a convertible axle drive and housing assembly as above characterized, the several parts of which are of simple and rugged mechanical form so that production costs and maintenance expense will be reasonably low.
With the above and other objects in view, the invention comprises my navel vehicle drive axle and the construction and relative arrangement of its several cooperating parts, as will hereinafter be more fully described, illustrated in the accompanying drawings and subsequently incorporated in the subjoined claims.