就算蜗轮蜗杆速度不够,他们就不能用单向自锁传动齿条而不是链条来做动力传递?再不济,用个棘轮也可以保证在扶梯台阶的链条断裂时不会下滑吧?
就算蜗轮蜗杆速度不够,他们就不能用单向自锁传动齿条而不是链条来做动力传递?再不济,用个棘轮也可以保证在扶梯台阶的链条断裂时不会下滑吧?
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