A trackless telescopic door

The invention discloses a trackless retractable door, which comprises a main door pillar, a secondary door pillar, a door body and a handpiece. The two ends of the door body are respectively connected with the secondary door pillar and the handpiece. The handpiece comprises a walking mechanism. The walking mechanism comprises a tracking dolly and a plurality of sets of guide units. The guide units are buried in the ground along the connecting line of the main door pillar and the secondary door pillar. Each set of guide units is composed of a pair of magnets in mirroring configuration. The tracking dolly comprises a guide module, a control circuit module, a pre-posed motor steering module, a post-posed motor driving module and a power supply module. The guide module comprises a chassis, a permanent magnet swing arm and two pressure sensors. The two pressure sensors are disposed respectively at the left and right sides of the chassis. The middle part of the permanent magnet swing arm is hinged to the chassis. One end of the permanent magnet swing arm is positioned below the chassis, and the other end of the permanent magnet swing arm is arranged between the two pressure sensors. Compared with an existing single-column type magnetically-guided retractable door, the above trackless retractable door is more accurate in orientation and simpler in structure, which can be well adapted to the installation condition.