【文章內(nèi)容簡介】
osite hand,mounted side by side on he same develop opposite thrust reactions and thus cancel at the thrust two or more single helcal gears are mounted on the same shaft,the hand of the gears should be selected so as to produce the minimum thrust load. Straight bevel gears are easy to design and simple to manufacture and give very good results in service if they are mounted accurately and in the case of spur gears,however,they bee noisy at higher values of the pitchline shese cases it is often good design practice to go to the spiral bevel gear,which is the bevel counterpart of the helical in the case of helicaal gears,spiral bevel bears give a much smoother tooth action than strain bevel gears,and hence are useful where high speed are is frequently desirable,as in the case of automotive differential applications,to have gearing similar to bevel gears but with the shaft gears are called hyoid gears because their pitch surfaces are hyperboloids of revolution,The tooth action between such gears is a bination of rolling and slidin along a straight line and has much in mon with that of worm gears. A shaft is a rotating or stationary of circular cross section,having mounted powertransmission subjected to bending,tension,pression,or torsional loads,acting singly or in bination with one another,When they are bined,one may expect to find both static and fatigue strength to be important design considerations,since a single shaft may be subjected too static stresses,pletely reversed,and repeated stresses,aii acting at the same time. The word “shaft” cover numerous variationgs,such as axles and axle is a shaft,either stationary or rotating,not subjected to torsion short rotating shaft is often called a spindle. When either the lateral or the torsional deflection of a shaft must be held to close limits,the shaft must be sized on the basis of deflection,before analyzing the stresses,The reason for this is that,if the shaft is made stiff enough so that the deflection is not too large,it is probable that the resulting stresses will be safe,But by no means should the designer assume that they are safe。it is almost always necessary to calculate them so that he knows they are within acceptable possible,the powertransmission elements,such as gears or pulleys ,should be located close to the supporting reduces the bending moment,and hence the deflection and bending stress. According to the discussion of vehicle dynamics, the control of jerk and slipping work is related to the change rate of main clutch transmitting torque. However, the torque transducer cannot be installed in the control system,so the transient torque signal cannot be obtained method that some investigators use is to control the output torque through controlling main clutch engaging the displacement can only reflect torque change indirectly. Their corresponding relationship is affected by many factors. And once the installed position changes or the signal dri