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集ji電dian器qi是shi滑hua觸chu線xian係xi統tong中zhong集ji電dian側ce拾shi取qu電dian能neng的de主zhu要yao裝zhuang置zhi，它ta通tong過guo集ji電dian刷shua與yu導dao軌gui的de滑hua動dong接jie觸chu，將jiang電dian能neng直zhi接jie傳chuan導dao至zhi用yong電dian器qi，從cong而er實shi現xian係xi統tong的de移yi動dong供gong電dian。集ji電dian器qi由you機ji械xie結jie構gou的de張zhang力li裝zhuang置zhi和he直zhi接jie與yu導dao軌gui滑hua動dong接jie觸chu的de集ji電dian刷shua兩liang部bu分fen組zu成cheng。
機ji械xie結jie構gou的de張zhang力li裝zhuang置zhi決jue定ding集ji電dian刷shua與yu導dao軌gui的de滑hua動dong接jie觸chu壓ya力li和he機ji構gou的de穩wen定ding性xing，集ji電dian刷shua則ze是shi導dao軌gui滑hua動dong接jie觸chu拾shi取qu電dian能neng的de導dao體ti，它ta的de性xing能neng和he導dao電dian質zhi量liang以yi及ji材cai料liao結jie構gou成cheng分fen的de優you劣lie，將jiang直zhi接jie影ying響xiang整zheng個ge係xi統tong設she備bei的de安an全quan運yun行xing質zhi量liang。