汽车主减速器外文翻译中英文对照

汽车主减速器外文翻译中英文对照内容摘要：

ar which is attachedtothedifferentialcase Doublereduction final drives may be found on military design vehicles, such as the 5ton truck. Many mercially designed vehicles of this size use a single or doublereduction final drive with provisions for two speeds to be incorporated Figure 514.?Doublereduction final drive TwoSpeed Final Drive The twospeed or dualratio final drive is used to supplementthegearingoftheotherdrivetrain ponents and is used in vehicles with a single drive axle fig515The operator can select the range or speed of this axle with a button on the shifting lever of the transmission or by a lever through linkage The twospeed final drive doubles the number of gear ratios available for driving the vehicle under variousloadandroadconditions Forexample,a vehiclewithatwospeedunitandafivespeed transmission,tendifferentforwardspeedsare available. This unit provides a gear ratio high enough to permit pulling a heavy load up steep grades and a low ratio to permit the vehicle to run at high speeds with a light load or no load The conventional spiral bevel pinion and ring gear drives the twospeed unit, but a plaary gear train is placed between the differential drive ring gear and the differential caseThe internal gear of the plaary gear train is bolted rigidly to the bevel drive gear. A ring on which the plaary gears are pivoted is bolted to the differential caseA member, consisting of the sun gear and a dog clutch, slides on one of the axle shafts and is controlled through a button or lever accessible to the operator When in high range, the sun gear meshes with the internal teeth on the ring carrying the plaary gears and disengages the dog clutch from the left bearing adjusting ring, which is rigidly held in the differential carrierIn this position, the plaary gear train is locked together. There is no relative motion between the differential case and the gears in the plaary drive trainThe differential case is driven directly by the differential ring gear, the same as in the conventional single fixed gear final drive. When shifted into low range, the sun gear is slid out of mesh with the ring carrying the plaary gears. The dog cl。