Force loading device based on springs

The invention discloses a force loading device based on springs. The force loading device comprises a base plate, a linear bearing, a first support unit, a second support unit, a third support unit, a hydraulic cylinder, lifting bolts, the springs and screw rods. Guide rails of the linear bearing are arranged on the base plate in parallel. Stopping blocks are used for preventing sliding blocks from sliding out of the guide rails. The first support unit is fixed to the two sliding blocks of the linear bearing. The second support unit and the third support unit are fixed to the base plate. The hydraulic cylinder penetrates through the second support unit, and the two ends of the hydraulic cylinder are connected with the first support unit and the third support unit correspondingly. The springs are installed between the lifting bolts of the first support unit and the second support unit. According to the force loading device, the passive loading mode is adopted, the system composition is simple and cost is low; the springs are installed in a multi-array mode, the number of the springs is changed, and different loading forces can be obtained easily; a support A is connected with the base plate through the linear bearing, so that the influence of friction force on the loading forces is reduced, and the number of hysteresis springs of the loading device is decreased; and resistance loading is realized through extension springs, and the connecting structure is simple compared with compression springs.