35results about How to "Promotes transmission balance" patented technology

The invention relates to a double-fluoranthene organic semiconductor material. The double-fluoranthene organic semiconductor material can be shown as a structural formula described in the specification, wherein -R is -CN, -NO2, -CF3, -F or -CHO. The double-fluoranthene organic semiconductor material emits pure blue lights, the double-fluoranthene organic semiconductor material can be easily dissolved in common organic solvents such as tetrahydrofuran, dichloromethane, methylbenzene and chloroform as an electron withdrawing group is introduced into the structure, and solubility and film-forming property of the double-fluoranthene organic semiconductor material are improved; meanwhile, a fluoranthene group is a rigid substituent group, so that the double-fluoranthene organic semiconductor material also has excellent thermal stability; the fluoranthene group can cause the double-fluoranthene organic semiconductor material to have higher hole mobility; and electro transport performance of the double-fluoranthene organic semiconductor material is improved as the electron withdrawing group is introduced, so that carrier transport balance is facilitated. The invention also provides a preparation method of the double-fluoranthene organic semiconductor material and an application of the double-fluoranthene organic semiconductor material in an organic electroluminescence device.

The invention provides a coupler for a rolling mill. The coupler comprises an internal-tooth flange, an external-tooth connector and a single-section crossed universal shaft with a fork head, wherein the internal teeth of the internal-tooth flange are meshed with the external teeth of the external-tooth connector; one end, which is away from the internal-tooth flange, of the external-tooth connector is connected with a connection pipe; one end, which is away from the external-tooth connector, of the connection pipe is fixedly connected with the fork head; lubricating oil is filled in a cavity formed between the internal-tooth flange and the external-tooth connector; a sealing end cover is arranged on the end part of the meshed end of the external-tooth connector and the internal-tooth flange and seals the external-tooth connector through a sealing ring. The coupler disclosed by the invention has large transmission torque and is high in transmission balance; the shortcomings of a rolling mill in a severe environment with a small space and a lot of water vapour are overcome; the coupler has an automatic lubricating function, can realize buffering and shock absorption and protect a transmission system, is convenient to mount and dismount and long in service life.