Caterpillar for cable mobile robot and cable mobile robot using the same

1. A caterpillar for a cable mobile robot comprising:

a case;

a plurality of first rotating members configured to rotate and distanced from one another inside the case;

a second rotating member configured to rotate and located between the first rotating members;

a belt member mounted to the first rotating members and the second rotating member;

a tension adjuster located between the second rotating members and the first rotating members, the tension adjuster being configured to support the belt member at a lower part of the tension adjuster so that tension in the belt is adjusted; and

a panel member located inside the case, and the panel member is configured to support the belt member while contacting an inner surface of the belt member.

2. The caterpillar according to claim 1 ,

wherein a part of the second rotating member protrudes outside a virtual plane that meets an outer surface of the first rotating members.

3. The caterpillar according to claim 1 ,

wherein the tension adjuster is located below the virtual plane.

4. The caterpillar according to claim 1 ,

wherein the tension adjuster comprises one pair of tension adjusters arranged such that they move towards or away from each other;

the one pair of tension adjusters are configured to move towards each other to decrease the tension of the belt member; and

the one pair of tension adjusters are further configured to move away from each other to increase the tension of the belt member.

5. The caterpillar according to claim 4 ,

wherein the tension adjuster comprises a stationary first tension adjuster, and a second tension adjuster capable of moving towards or away from the first tension adjuster along a longitudinal direction of the case.

6. The caterpillar according to claim 1 , further comprising

a support member located on an opposite surface of a surface that contacts a cable so that the location of the panel member is immobilized.

7. The caterpillar according to claim 6 ,

wherein the panel member is made of a Ultra High Molecular Polyethylene (UHMWPE) resin.

8. The caterpillar according to claim 1 ,

wherein the belt member is made of rubber.

9. The caterpillar according to claim 1 ,

wherein the belt member has notches formed on an inner surface, and

at least one of the first rotating members and second rotating member is a timing pulley configured to interlock with the notches of the belt member.

10. A cable mobile robot for moving along a cable, the robot comprising:

a main body configured to encircle the cable;

a plurality of caterpillars housed inside the main body, the plurality of caterpillars comprising:

a case;

a plurality of first rotating members configured to rotate and distanced from one another inside the case;

a second rotating member configured to rotate and located between the first rotating members;

belt member mounted to the first rotating members and the second rotating member;

a tension adjuster located between the second rotating member and the first rotating members, the tension adjuster being configured to support the belt member at a lower part of the tension adjuster so that tension in the belt is adjusted; and

a panel member located inside the case, and the panel member is configured to support the belt member while contacting an inner surface of the belt member,

wherein the caterpillars are configured to be longitudinally oriented with respect to the cable and to contact an outer surface of the cable such that the caterpillars are angularly spaced from one another.

11. The cable mobile robot according to claim 10 ,

wherein the caterpillars are further configured to be distanced from one another along the outer surface of the cable by a same angle.

12. The cable mobile robot according to claim 11 ,

wherein two caterpillars are further configured to be distanced from each other along the longitudinal direction of the cable.

13. The cable mobile robot according to claim 10 ,

further comprising a distance adjuster located between the caterpillar and the main body, the distance adjuster being configured to adjust the distance between the caterpillar and the main body so that the caterpillar maintains contact with the cable.