2000-2003 Honda TRX350 Rancher factory service manual, Page 367Get this manual
TECHNICAL FEATURES DIFFERENTIAL OPERATION Figure shows the conditions when one wheel wants to spin, that is, tries to rotate faster than the differential caseThe torque generates force applied to the flank of the follower dog from the differential case spline, which is then shared between the two face cams by forces on the inclined facesFigure shows the friction forces on the ends of the cam followerSince the differential speed is intermediate between the two face cam speeds, the cam follower will to move faster than the face cam at one end, and slower than the face cam at the other endThis generates friction forces that are in opposite directions, leading to total resultant forces that are large on the slow face cam and small on the fast face camIf there is relative speed, then the friction must be at its limiting value, but it can build up to this progressively before rotation occursFigure shows how the load is shared between the followersOnly those followers bearing on the forward faces of the face cam form transmit torqueThe bold lines show the load bearing areas at any one time, and there is always just less than half the cam followers drivingThe figure shows the situation at number of discrete time steps, showing how the load carrying role is passed from follower to followerThe right hand face cam is drawn in the same position as point of reference where the left hand face cam moves down with the cam followers (which are carried by the differential case moving down at about half speed)1 CAM FOLLOWER: CAM FOLLOWERS Intermediate speed Input drive load