Carrying device, warehousing logistics system, and pallet carrying method

A carrying device, configured to carry a pallet, the carrying device comprising:

• a vehicle body, which is configured to move autonomously;
• a mounting bracket, which is horizontally slidably disposed on the vehicle body;
• and
• a fork arm, wherein a first end of the fork arm is connected to the mounting bracket;
• the fork arm is configured to protrude horizontally along with movement of the mounting bracket to be inserted into a fork hole of the pallet, and raise or lower relative to the mounting bracket to lift the pallet;
• and the vehicle body and the mounting bracket are configured to, when the fork arm lifts the pallet, enable the pallet to be located above the vehicle body by relative movement between the vehicle body and the mounting bracket;
• wherein the fork arm is configured to switch between being supported on ground and off the ground so that the fork arm crosses over a bottom beam of the pallet in a case of being off the ground, and after the fork arm is partially inserted into the fork hole, the fork arm partially located inside the fork hole is supported on the ground;
• wherein the fork arm comprises:
• an arm body, wherein an end of the arm body is connected to the mounting bracket;
• and
• a support, which is disposed on the arm body and spaced from the mounting bracket, and is configured to protrude downwards relative to the arm body to support the fork arm and configured to retract upwards to enable the fork arm to be off the ground to enable the fork arm to cross over the bottom beam of the pallet;
• wherein the fork arm further comprises a lifting driving mechanism configured to drive the support to raise or lower relative to the arm body, and drive the arm body to raise or lower relative to the mounting bracket;
• wherein the lifting driving mechanism comprises:
• a second connecting rod, wherein a first end of the second connecting rod is hinged to the mounting bracket, and a second end of the second connecting rod is configured to support the arm body;
• and
• a second driving assembly, which is configured to drive the second connecting rod to rotate to raise or lower the arm body;
• wherein the second driving assembly comprises:
• a screw rod comprising a third thread segment;
• a second nut seat, which is rotatably sleeved on the third thread segment, and the second end of the second connecting rod is hinged to the second nut seat;
• and
• a lifting driving motor, which is configured to drive the screw rod to rotate to drive the second nut seat to move;
• and
• wherein the second nut seat comprises a thread sleeve part and a sliding seat part slidingly sleeved on the thread sleeve part, the thread sleeve part and the third thread segment are in transmission fit, the thread sleeve part is provided with two position-limiting seat parts configured to limit a sliding travel of the sliding seat part, and the second connecting rod is hinged to the sliding seat part.