Chapter 3 Coupling and Drive Axle Section 1 Coupling 1.2 The Requirements of Constant Velocity for Double Cardan Universal Joint Figure 3-3 Constant speed drive arrangement of double cardan universal joint 1,3.driving fork 2,4.driven fork 2.Constant Velocity Universal Joint Figure 3-4 Fundamental principle of constant velocity universal joint 机城与电子工程度 Automobile and Tractor Northwest A&F UniversityAutomobile and Tractor Northwest A&F University Chapter 3 Coupling and Drive Axle 1.2 The Requirements of Constant Velocity for Double Cardan Universal Joint 2. Constant Velocity Universal Joint Figure 3-3 Constant speed drive arrangement of double cardan universal joint 1,3. driving fork 2,4. driven fork Figure 3-4 Fundamental principle of constant velocity universal joint Section 1 Coupling