Duplicate gear and production tool and process thereof

Abstract

The invention relates to a duplicate gear and a production tool and process thereof, and belongs to the field of duplicate gear production. The duplicate gear comprises a fixed shaft, a first gear body is coaxially and fixedly connected to the fixed shaft, a second gear body is coaxially arranged on the fixed shaft and located on one side of the fixed shaft in a sleeving mode, and a matched knurl wheel is coaxially and fixedly connected to the fixed shaft. The production process comprises the steps of gear blank sleeving, gear blank hot melting, cooling shaping and gear blank outer tooth cold machining. According to the duplicate gear, the meshing gear structure of the second gear body is formed by directly taking the sawtooth structure, matched with the knurl wheel, on the fixed shaft as a model, so that the firmness degree of the matching state of the second gear body and the fixed shaft is improved, and the duplicate gear can stably transmit larger torque.

Description

technical field [0001] This application relates to the production field of dual gears, in particular to a dual gear and its production tooling and process. Background technique [0002] Two coaxial gears with the same modulus and different numbers of teeth are called duplex gears. Duplex gears are usually used in transmission mechanisms to increase the compactness of the components in the mechanism. [0003] In the related art, a dual gear used inside the motor includes a fixed shaft and two gear bodies coaxially fixed on the fixed shaft, one of which is integrally formed with the fixed shaft, and both of them are made of metal; the other The gear body is made of polymer material, and when meshing with the gear body made of polymer material, the noise generated by the gear transmission is relatively small. A matching knurling wheel is formed on the fixed shaft, and meshing teeth are formed on one side of the inner ring of the polymer material gear for meshing with the match...

AI Technical Summary

Problems solved by technology

[0005] In view of the related technologies mentioned above, the inventor believes that there are the following defects: the sawtooth module of the injection mold and the matching knurling wheel on the fixed shaft have uncertain shape errors, and the polymer gear with a high degree of cooperation with the sawtooth module The body does not necessarily still have a high degree of cooperation with the matching knurled wheel, that is, the cooperation between the gear body and the fixed shaft is poor, and the circumferential stability and transmission firmness of the two will be negatively affected.

Images