According to the load weight of 1000N, we choose two guide rods and screws and nuts to evenly distribute the load on the sliding bearing. The upper and lower six sliding bearings are respectively connected with the bottom plate and the upper fixed plate. The bearing seats on both sides are fixed, and the middle six seats can be slid up and down by screws and nuts. The six guide rods are added with screws and nuts, so that the load on the sliding bearing of each guide rod is 166n. The sliding bearing selected in this design is flange-shaped.