Displacement measuring device for anchor rod drawing experiment

The utility model discloses a displacement measuring device for an anchor rod drawing experiment, which comprises a measuring ruler, one end of the measuring ruler is sequentially connected with a clamping piece, a sleeve, a jack piston, a jack and a wedge block through an anchor rod, and the other end of the measuring ruler is connected with a bracket; the measuring ruler comprises a main ruler,an auxiliary ruler is sleeved with the main ruler, the main ruler is connected with a fixed sleeve B through a spherical hinge, and the auxiliary ruler is connected with a fixed sleeve A through a spherical hinge. The device is simple in structure and convenient to install and test, the wedge-shaped block is mainly used for adjusting the included angle between the slope surface and the axis of theanchor rod so as to ensure that the axis of the jack coincides with the axis of the anchor rod, and measurement errors caused by deflection in the anchor rod loading process are reduced. Spherical hinges are arranged between