Unmanned guided carrier and chassis therefor

1. A chassis for an unmanned guided carrier, wherein the chassis comprises a chassis body ( 100 ), two driving wheel set modules ( 200 ) and a torsion shaft caster module ( 300 ) mounted on the chassis body ( 100 ), the torsion shaft caster module ( 300 ) comprises a torsion shaft ( 310 ) rotatably mounted on the chassis body ( 100 ) and two supports ( 320 ), one end of each of the two supports ( 320 ) is fixed to one of both ends of the torsion shaft ( 310 ) respectively, an universal wheel ( 330 ) is mounted at the other end of each of the two supports ( 320 ), an elastic member ( 340 ) is provided between said other end of each of the two supports ( 320 ) mounted with the universal wheel ( 330 ) and the chassis body ( 100 ), the elastic member ( 340 ) applies an elastic force to the universal wheel ( 330 ) to make it cling to a ground.

2. The chassis according to claim 1 , wherein the torque shaft caster module ( 300 ) is provided between the two driving wheel set modules ( 200 ), the two driving wheel set modules ( 200 ) are each arranged on a center line of the chassis body ( 100 ) which extends in a length direction of the chassis body ( 100 ).

3. The chassis according to claim 1 , wherein both the universal wheels ( 330 ) are provided on both sides of a center line of the chassis body ( 100 ) respectively which extends in the length direction of the chassis body ( 100 ).

4. The chassis according to claim 3 , wherein the torsion shaft caster module ( 300 ) is mounted on the chassis body ( 100 ) with the center line as a symmetrical axis.

5. The chassis according to claim 1 , wherein a top surface of the chassis body ( 100 ) is a plane, and a projection of the chassis body ( 100 ) in a direction perpendicular to the top surface is of a shape of square, rectangular or circular.

6. The chassis according to claim 1 , wherein the torsion shaft caster module ( 300 ) further comprises a mounting plate ( 350 ) being fixed on the chassis body ( 100 ), and the torsion shaft ( 310 ) is rotatably mounted on the mounting plate ( 350 ).

7. The chassis according to claim 1 , wherein the elastic member ( 340 ) is a compression spring.

8. The chassis according to claim 1 , wherein a damping member ( 360 ) is provided between said other end of each of the two supports ( 320 ) mounted with the universal wheel ( 330 ) and the chassis body ( 100 ).

9. The chassis according to claim 1 , wherein the driving wheel set module ( 200 ) comprises a base body ( 210 ) and a differential driving body ( 220 ), the base body ( 210 ) is mounted on the chassis body ( 100 ), the differential driving body ( 220 ) comprises two differentially matched driving wheels ( 221 ), and the differential driving body ( 220 ) is rotatably mounted on the base body ( 210 ), the two driving wheels ( 221 ) are located on both sides of a rotation center of the differential driving body ( 220 ) respectively.

10. The chassis according to claim 9 , wherein the base body ( 210 ) comprises a mounting base plate ( 211 ), a slewing bearing ( 212 ) and a connecting base ( 213 ), the mounting base plate ( 211 ) is mounted on the chassis body ( 100 ), the connecting base ( 213 ) is rotationally connected with the mounting base plate ( 211 ) through the slewing bearing ( 212 ), and a rotation plane of the slewing bearing ( 212 ) is perpendicular to a rotation direction of the differential driving body ( 220 ), and the differential driving body ( 220 ) is rotatably connected to the connecting base ( 213 ).

11. An unmanned guided carrier, comprising the chassis according to claim 1 .