提升定时和检验装置常常包括一些能够传输恒定输出转矩的特殊弹簧。假定输出转矩近似恒定,那么,就可利用廉价的弹簧联动装置代替昂贵的恒定转矩弹簧。该装置包括一个简单的螺旋拉伸弹簧和旋转杠杆。随着弹簧力的增加或者减小,该弹簧联动装置的力臂就相应地减小或者增加,从而获得平衡,使该装置可以在一个有限的旋转范围内产生近似恒定的输出转矩。例如:当杠杆反时针旋转时,该装置力臂减小,而弹簧力增加,通过选择适当的弹簧刚度,力臂 Lifting timing and inspection devices often include special springs that deliver a constant output torque. Assuming that the output torque is approximately constant, an inexpensive constant torque spring can be replaced with an inexpensive spring linkage. The unit consists of a simple helical tension spring and a rotary lever. As the spring force increases or decreases, the force arm of the spring linkage is correspondingly reduced or increased to achieve a balance that allows the device to produce an approximately constant output torque over a limited range of rotation. For example, when the lever is rotated counterclockwise, the arm of the device is reduced and the spring force is increased. By selecting the appropriate spring rate,