所述后地板加强梁上的一平面为后弹簧支座面，后弹簧安装在后弹簧支 座面的下表面；

One plane of the rear-floor strengthening beam is a rear spring supporting seat surface, the rear spring is installed at the lower surface of the rear spring supporting seat surface;

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弹簧下沉是从减震完全伸展开到骑手坐到车上后弹簧的压缩量，也叫作静态下沉或静态骑乘高度。

Spring sag is the amount the springs compress between fully topped out and fully loaded with the rider on board in riding position. It is also referred to as static ride height or static sag.

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本文根据力学原理，研究了弹簧端圈的弹性变形能。推导出修整后弹簧刚度公式，并通过实例得到证实。

According to the mechanical theory, this paper researches the spring deformation energy and induces the spring rigid formula, which confirmed by examples.

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