Underneath type manhole cover compression testing machine for measuring deformation

The utility model discloses an underneath type manhole cover compression testing machine for measuring deformation, and belongs to the technical field of manhole cover compression tests. The testing machine comprises a lower cross beam; the lower cross beam is fixedly connected with a workbench, the two opposite sides of the workbench are fixedly connected with stand columns, an upper cross beam is fixedly connected between the tops of the stand columns, the upper cross beam is fixedly connected with a normal loading mechanism, the normal loading mechanism faces downwards, and the bottom of the normal loading mechanism is fixedly connected with a force transducer; a containing groove is formed in the top of the workbench, a lifting mechanism is fixedly connected into the containing groove, and a deformation sensor is fixedly connected to the lifting mechanism. According to the utility model, the working table is arranged, the lifting mechanism is connected in the working table, the deformation sensor is hidde