Vacuum machine unit machine frame with bottom frame capable of being drawn

The invention relates to the field of vacuum-machine machine frames, and discloses a vacuum machine unit machine frame with a bottom frame capable of being drawn. The vacuum machine unit machine framecomprises a main frame, the bottom frame located in the main frame and directional wheels located on the lower portion of the bottom frame. Turnover assemblies driving the directional wheels to overturn sideward are arranged on the lower portion of the bottom frame. Each turnover assembly comprises a guide base connected to the main frame and a turnover piece connected to the bottom frame in a pivoted manner. A first guide groove is formed in each guide base. Each turnover piece comprises a first connection section connected with the corresponding directional wheel, a pivoted connection section used for being connected with the bottom frame in a pivoted manner, a second connection section and a guide section matched with the corresponding first guide groove. Each first guide groove comprises a first lead-in section, a turnover section and a first lead-out section. The guide sections drive the directional wheels to overturn sideward when moving along the turnover sections, positioningpieces used for positioning the turnover pieces are connected to the bottom frame, a tangent plane is arranged on each turnover piece, the turnover pieces cannot rotate when the positioning pieces areconnected with the tangent planes in an abutting manner, a second guide part is arranged on each guide base, and the second guide parts and second guide grooves can cooperate to drive the positioningpieces to be separated from the tangent planes.