Jack ejection amount measuring device for bridge friction loss test

The utility model discloses a jack ejection amount measuring device for a bridge friction loss test, which comprises a front caliper bracket and a rear caliper bracket which are horizontally arranged on a jack, a metal base is adsorbed on the jack by rotating a magnetic switch, and a main scale of a digital display vernier graduated scale is fixed on a front buckle and a rear buckle. The auxiliary ruler is drawn to enable the magnetic clamping jaw to be attracted to the jack oil cylinder, the auxiliary ruler moves synchronously along with the jack oil cylinder, and the displacement value is read through the digital display device. The device can synchronously measure the ejection amount of the jack oil cylinder in real time, and is high in precision, good in safety, high in working efficiency, simple in structure and convenient to process and manufacture. 本实用新型公开了一种桥梁摩阻损失试验千斤顶出顶量测量装置，包括前后两个水平放置于千斤顶上的卡尺支架，通过转动磁吸开关使金属底座吸附于千斤顶上，将数显游标刻度尺的主尺固定于前后两个卡扣上，抽动副尺使磁性卡爪吸附于千斤顶油缸上，副尺跟随千斤顶油缸同步位移，通过数显装置读取位移值。本实用新型可以实时同步测量千斤顶油缸