M.A. Khalturin
Kuzbass State Agricultural Academy, ul. Markovtseva, 5, Kemerovo, 650056, Russian Federation
Abstract. The research was carried out with the aim of synthesizing a lever-gear mechanism of intermittent motion with internal gearing. It can be used in technological equipment to obtain intermittent movement of the working bodies. The design is based on a hinged four-link mechanism. The device operates without breaking the kinematic connection between the links. The presence of internal gearing provides lower coefficients of slip ratio and compact dimensions of the device, compared to the prototype with external gearing. One of the main advantages of the device is the smoothness of operation. Reversibility is possible. Additionally, the device performs a downshift function. The proposed arrangement of the mechanism is characterised by high load capacity. For its synthesis, a calculation algorithm implemented on a computer is proposed. In this case, the gear ratio, the module and the number of teeth of the drive gear are set as the initial parameters. As a result, the length of the links of the hinged four-link mechanism, the number of teeth of the support wheel, as well as the maximum (or required, but not more than the maximum) value of the approximate (apparent) stop are determined. The angle of motion transmission between the connecting rod and the rocker arm was used as a performance criterion in the synthesis. The calculation of the geometric parameters of the gearing is implemented using the programs Bevel gears x64 and Internal bevel gears x64. As an example, the synthesis of mechanisms with a gear ratio from 3.15 to 6.3 was observed, provided that the maximum approximate stop was reached for each revolution of the input shaft. According to the proposed layout option, the mechanism can be either open or closed. A physical model of the lever-gear mechanism was made on a 3D printer. The operability of the device is confirmed by the correspondence of the kinematic characteristics of the physical model to the synthesis results.
Keywords: intermittent gear; gear ratio; lever-gear mechanism; hinged four-link mechanism; motion transfer angle; gear; internal gear.
Author Details: M.A. Khalturin, Cand. Sc. (Eng.), senior lecturer.
For citation: Khalturin M. A. [Development of a lever-gear mechanism of intermittent motion with internal gearing] Dostizheniya nauki i tekhniki APK. 2022;36(6):84-8. Russian. doi: 10.53859/02352451_2022_36_6_84.