{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T01:55:00Z","timestamp":1760234100700,"version":"build-2065373602"},"reference-count":45,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2021,4,14]],"date-time":"2021-04-14T00:00:00Z","timestamp":1618358400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Natural Science Foundation of China","award":["51175455"],"award-info":[{"award-number":["51175455"]}]},{"name":"Key Research and Development Project of Zhejiang Province","award":["2019C01053"],"award-info":[{"award-number":["2019C01053"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Symmetry"],"abstract":"<jats:p>Symmetry widely exists in natural objects and man-made objects. Mechanical structures, as man-made objects, have the property of symmetry without exception. The existence of symmetry affects the function and performance of mechanical products. Therefore, on the basis of analyzing a large number of examples and referring to the Schoenflies symbol of crystal, the symmetry of mechanical structures is divided into point group symmetry and space group symmetry, and these two types are further subdivided according to the types and spatial positions of the symmetry elements. Then, the general effects of symmetry are summarized according to symmetry types and functions, and several symmetry rules for design are further refined. Finally, after defining the requirements of speed change and technology background, a multispeed device for bicycle shaft drive is proposed by applying symmetry knowledge comprehensively.<\/jats:p>","DOI":"10.3390\/sym13040683","type":"journal-article","created":{"date-parts":[[2021,4,14]],"date-time":"2021-04-14T23:35:12Z","timestamp":1618443312000},"page":"683","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Classification and Effects of Symmetry of Mechanical Structure and Its Application in Design"],"prefix":"10.3390","volume":"13","author":[{"given":"Qingying","family":"Qiu","sequence":"first","affiliation":[{"name":"State Key Lab of Computer Aided Design and Computer Graphics, Zhejiang University, Hangzhou 310027, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8057-014X","authenticated-orcid":false,"given":"Xiuming","family":"Chen","sequence":"additional","affiliation":[{"name":"State Key Lab of Computer Aided Design and Computer Graphics, Zhejiang University, Hangzhou 310027, China"}]},{"given":"Chao","family":"Yang","sequence":"additional","affiliation":[{"name":"State Key Lab of Computer Aided Design and Computer Graphics, Zhejiang University, Hangzhou 310027, China"}]},{"given":"Peien","family":"Feng","sequence":"additional","affiliation":[{"name":"State Key Lab of Computer Aided Design and Computer Graphics, Zhejiang University, Hangzhou 310027, China"}]}],"member":"1968","published-online":{"date-parts":[[2021,4,14]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Montoya, F.G., Ba\u00f1os, R., Alcayde, A., and Manzano-Agugliaro, F. 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