The invention relates to the technical field of manipulators, in particular to a
finger structure of a dexterous hand, which comprises a connecting block, a palm shell, a
thumb assembly, a finger
assembly and a joint lubricating
assembly, the palm shell is fixedly connected to one side of the connecting block, the finger assembly is hinged to one side, away from the connecting block, of the palm shell, the
thumb assembly is arranged at the side part of the finger assembly, and the joint lubricating assembly is arranged at the other side of the palm shell. The
thumb assembly is installed in the palm center shell, joints of the thumb assembly and the finger assembly are in sliding fit with joint lubricating assemblies, a
rope driving structure is adopted integrally, the installation number of motors at the joints is reduced, meanwhile, independent driving structures between fingers are adopted and can be matched with one another, and therefore various grabbing actions can be flexibly carried out; according to the mechanical arm, lubricating
oil can flow out through
extrusion force between the
rope pipe and all the joints, the lubricating purpose is achieved, friction at the joint connecting positions is reduced, the flexibility of the thumb assembly and the finger assembly in the grabbing process is improved, and the clamping precision is guaranteed.