Track tension device and track moving device

A track tension device configured for a track, wherein the track tension device comprises:

• an upper run being an upper portion of a transmission belt disposed on the track, and at least one track inner tooth disposed on a lower surface of the upper run;
• a lower run being a lower portion of the transmission belt, and at least one track inner tooth disposed on an upper surface of the lower run;
• an upper tension portion having an upper end disposed tangentially to or engaged with the lower surface of the upper run, and configured to tension the upper run;
• at least one lower compression portion having a lower end disposed tangentially to the upper surface of the lower run, and configured to compress the lower run;
• and
• a resilient support portion having an end connected to the upper tension portion and another end connected to the lower compression portion, and configured to support the upper tension portion and the lower compression portion;
• the track tension device further comprises:
• a track side plate disposed on a side of the track;
• at least one longitudinal slot perpendicularly disposed in an upper portion of the track side plate;
• at least one installing shaft, an end of each installing shaft up-and-down-slidably disposed in one longitudinal slot;
• wherein the installing shaft comprises at least one gear installation shaft;
• wherein the upper tension portion comprises at least one tension gear, each tension gear installed on one gear installation shaft through a roller bearing and having an upper end engaged with the lower surface of the upper run;
• wherein the tension gear is a double straight tooth cylindrical gear and comprises:
• two cylindrical gears engaged with the lower surface of the upper run;
• and
• a linkage portion disposed between the two cylindrical gears;
• and
• wherein diameters of the two cylindrical gears cylindrical gear are the same, and a diameter of the linkage portion is less than a diameter of the cylindrical gear.