Patent ID: 11904461
Assignee: MOTION DEVICE INC.
Field: Handling (Mechanical engineering)
Classification: CPC B | IPC B

Claim 10:
11. The payload transportation device of claim 1, wherein the lift-driving portion comprises:
a lift-driving unit (210) configured to generate a rotational force to vertically lift the loading plate;
a first power transmission portion (230) in which cam members (232, 233) rotated by the rotational force of the lift-driving unit (210) and each including a cam protruding portion protruding from a position eccentric from a center and a guide groove in which the cam protruding portion is inserted are formed to apply a vertical lifting force to one side of a bottom of the loading plate due to lifting members (235, 236) linearly moving upward or downward when the cam members (232, 233) rotate and which is provided in the first assembly (1); and
a second power transmission portion (250) in which cam members (252, 253) rotated by the rotational force of the lift-driving unit (210) and each including a cam protruding portion protruding from a position eccentric from a center and a guide groove in which the cam protruding portion is inserted are formed to apply a vertical lifting force to the other side of the bottom of the loading plate due to lifting members (255, 256) linearly moving upward or downward when the cam members (252, 253) rotate and which is provided in the second assembly, and
wherein when the cam members (232, 233) and the cam members (252, 253) rotate 360 degrees, positions of the cam protruding portions of in the guide grooves vary.