全自动和半自动机械表的区别?
手动和全自动和半自动机械表的区别
推荐回答(4个)
一、构造上不同
1、全自动机械表:全自动机械表是一种不需要电池供电,一般使用运动中的能量上发条的全自动手表。
2、半自动机械表:表内设置有一个围绕发条齿轮的可转动的重锤。
二、运作原理上不同
1、全自动机械表:自动锤用螺钉固定在中心自动锤轴上。在外力的作用下,它围绕中心旋转,带动换向轮,换向轮轴齿又推动自动传动轮转动,自动传动轮推动自动头轮,自动头轮与大钢轮齿啮合,使大钢轮一个齿一个齿地转动而上条。
2、半自动机械表:运作原理在于手臂的摆动会带动机芯绕圈,从而达到自动上弦的目的。
三、摆锤转动时的方向不同
1、全自动机械表:表中摆锤绕轴向任一方向(包括顺时针、反时针)转动都有上发条作用的叫全自动机械表。
2、半自动机械表:摆锤转动时,只有一个方向有效而另一方向是空转的叫半自动机械表。
参考资料来源:百度百科-半自动机械表
百度百科-全自动机械手表
机械表分手动,半自动,和全自动3种,手动的就是用手上发条,半自动和全自动他们的相同之处就是都不用手动上发条,半自动机械表是第一代不用手动上发条的机械表,而全自动是他的升级版,是国外一些名表厂家对第一代的改良.
具体就是,半自动机械表是靠表内一个金属锤在人带着时候手腕运动不断敲击上发条的齿轮使之自动上劲儿,是300度的敲击,而改良后的全自动机械表是360度的敲击,更灵活,精确,好用,均匀.太专业的我也说不上来了.
自动机械手表分为全自动机械表和半自动机械表。
自动机械表不用电池,但要有发条的,和普通手动上弦机械表唯一不同的是在表内设置一个围绕发条齿轮的可转动的重锤,当人的手在运动的时候,自动表随着手摆动,表内的摆锤就可以绕着位于表机中心的轴转动,并带动有关齿轮逐级传动,最后带动发条棘轮转动,发条便被逐渐上紧。在传动过程中,由于齿轮具有轮轴的省力作用,所以摆锤的小小动力会逐级增大,达到能够转紧发条的程度;反过来,其转动距离却逐级变小,因此,摆锤转动一周,发条只上了一点点,但由于人手在不断的摆动,等于一天到晚不断地上发条,其储藏的能量就足够表机走动之用。
表中摆锤绕轴向任一方向(包括顺时针、反时针)转动都有上发条作用的叫全自动机械表;另一种是摆锤转动时,只有一个方向有效而另一方向是空转的叫半自动机械表。
全自动机械表是靠平时的人体活动来自动上链,半自动机械表需要手动上链
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