| 摘要 |
PROBLEM TO BE SOLVED: To compatibly ensure the steering stability and the vibration damping performance and to reduce the weight of an elastic universal joint. SOLUTION: A cushioning cylinder 3 is provided on a tip part of a shaft 2a via a coupling bracket 25, and a cylindrical part 14 of a first yoke 4 is internally fitted and fixed to the cushioning cylinder 3. Projecting pieces 10a and 10a fixed to the tip part of the shaft 2a are loosely engaged with notches 17 and 17 formed in the cylindrical part 14. An engagement part is located inwardly in the diameter direction of the cushioning cylinder 3. The small torque is transmitted via the coupling bracket 25 and the cushioning cylinder 3 while the large torque is transmitted by the engagement of the projecting pieces 10a and 10a with the notches 17 and 17. The steering stability and the vibration damping performance is ensured because the diameter of the cushioning cylinder 3 is increased. In addition, the weight is reduced by reducing the wall thickness of the coupling bracket 25 to transmit only the small torque. Further, the size and the weight is also reduced by reducing the size in the axial direction.
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