6个力作用于金属推块 V-带的推块上 ,前文我们采用测量推块和遥测装置成功地测出了稳态下这 6个作用力。本文采用相同的试验和测量装置测出速比变化从低到高或相反的不稳定状态下的 6个作用力。实验结果表示除法向力和环与推块间的摩擦力外其余 4个力的分布形式是与稳态不同的。 Six forces acting on the metal push block V-belt push block, the above we have used the measurement push block and telemetry successfully measured the steady-state of the six forces. In this paper, the same test and measurement device is used to measure the six forces in the unstable state where the speed ratio varies from low to high or vice versa. The experimental results show that the distribution of the remaining four forces is different from the steady state except for the normal force and the friction between the ring and the push block.