| 摘要 |
PROBLEM TO BE SOLVED: To provide the spring kit with a variable spring constant which can change the spring constant without replacing the spring. SOLUTION: By screwing a spring 1 whose one end is an open end in the adjuster collar 2 having a spiral groove 2a and adjusting its free height, an arbitrary spring constant is obtained. By providing a lock means installation part on the important position of the projected parts of both sides of the groove of the adjuster collar and fixing the near position of the open end of the spring 1 by a lock means 3, both of the spring and adjuster collar 2 are integrated and the spring constant by which the height of the spring positioning to the upperside of the adjuster collar in response to the lock position is made to a free height is obtained. At the adopting time to the vehicular suspension, the effect same as the replacement of various kinds of spring can be generated by only the adjustment of the lock position instead of the spring replacement.
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