Abstract
A gear is used not only for power transmission but also in precision positioning. A conventional and general gear has only one degree of freedom motion. Therefore, the case of its use is limited. In this paper, we propose and manufacture an innovative spherical gear. The proposed spherical gear has a multiple degrees of freedom motion. Compared with other spherical gear, the proposed spherical gear does not have complex shape. Moreover, the handle of the proposed spherical gear is similar to that of a spur gear. The experimental apparatus using the spherical gear pair measures a transmission efficiency and an angular backlash between the gears. According to experimental results, the spherical gear teeth could mesh firmly and transmit power at any shaft angle. In addition, the maximum transmission efficiency and the angular backlash become about 87.1% and 16.9 mrad when the shaft angle is 0°, respectively.
References
Oiwa, T., & Katsuki, M. (2015). Survey of questionnaire on ultra-precision positioning. Journal of the Japan Society for Precision Engineering, 81(10), 904–910. https://doi.org/10.2493/jjspe.81.904
Oiwa, T., Katsuki, M., Karita, M., Gao, W., Makinouchi, S., Sato, K., & Oohashi, Y. (2011). Questionnaire survey on ultra-precision positioning. International Journal of Automation Technology, 5(6), 766–772.
Li, Yu., Wang, G., & Zou, S. (2018). The experimental research on gear eccentricity error of backlash-compensation gear device based on transmission error. International Journal of Precision Engineering and Manufacturing, 19, 5–12. https://doi.org/10.1007/s12541-018-0001-7
Zou, S., Wang, G., & Jiang, Y. (2020). Two-sided contact mesh stiffness and transmission error for a type of backlash-compensated conical involute gear pair. International Journal of Precision Engineering and Manufacturing, 21, 1231–1245. https://doi.org/10.1007/s12541-019-00277-9
Yang, S.-C., Chen, C.-K., & Li, K.-Y. (2002). A geometric model of a spherical gear with a double degree of freedom. Journal of Materials Processing Technology, 123(2), 219–224. https://doi.org/10.1016/S0924-0136(02)00067-5
Yang, S.-C. (2007). A study of an elbow mechanism generated by a conical cutter. Proceedings of the Institution of Mechanical Engineering, Part C Journal of Mechanical Engineering Science, 221(12), 727–738.
Hu Ran, L. (2009). A new kind of spherical gear and its application in a robot’s wrist. Robotics and Computer-Integrated Manufacturing, 25, 732–735. https://doi.org/10.1016/j.rcim.2008.07.002
Yang, H.-C., & Lai, C.-H. (2017). Mathematical model and manufacturing of a human or a robotic knee joint. Journal of Advanced Mechanical Design, Systems, and Manufacturing. https://doi.org/10.1299/jamdsm.2017jamdsm0002
Nayak, P. K., & Shunmugam, M. S. (2012). CAD simulation and generation machining of discrete ring-involute spherical segment gear pair. Proceedings of the Institution of Mechanical Engineering, Part C Journal of Mechanical Engineering Science, 226(7), 1832–1844.
Yang, S.-C. (2002). Mathematical model of a ring-involute-teeth spherical gear with a double degree of freedom. The International Journal of Advanced Manufacturing Technology, 20, 865–870. https://doi.org/10.1007/s001700200210
Ting, L., & Cunyun, P. (2009). On grinding manufacture technique and tooth contact and stress analysis of ring-involute spherical gears. Mechanism and Machine Theory, 44, 1807–1825. https://doi.org/10.1016/j.mechmachtheory.2009.03.005
Acknowledgements
The public interest NAGAI foundation for science & technology and TATEMATSU foundation financially supported this study. This work was also supported by JSPS KAKENHI Grant Number 16K06062. Mr. T. Kawamura, who graduated from the National Institute of Technology, Toyota College, helped to design the spherical gear using 3-D CAD, and Mr. T. Maeda and Mr. T. Higuchi of the Toyota Innovation Centre helped in the manufacture of the gears. Mr. T. Yamashita and Mr. R. Yamazaki, of the NITTC Precision laboratory, served as assistants in the experiments.
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Tanaka, T., Oiwa, T. & Kotani, A. Proposal for a Multiple-DOF Spherical Gear and Investigation of Backlash and Transmitted Efficiency Between Gears. Int. J. Precis. Eng. Manuf. 22, 1897–1908 (2021). https://doi.org/10.1007/s12541-021-00587-x
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DOI: https://doi.org/10.1007/s12541-021-00587-x