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林善言不愧是动手能力极强的人,再加上谭老爷子的辅助,很快便做出了一个手摇式的打谷机滚轴。

不仅做出了滚轴,还给滚轴前方加上了一个木仓,用来接住和盛放脱下来的稻粒。

于是一个简陋的打谷机便出世了。

正式试用的时候,任芸也特地过来旁观。

林善举抓着一小捆稻谷放在滚轴上,林善言则负责摇。随着滚轴滚动起来,钉在滚轴上的铁丝飞快地剐蹭着稻谷,稻粒随之脱落下来,落入了木仓里。

林善举翻动着手中的稻谷,使之受力均匀,眼见着稻粒“哗啦啦”往下掉,他忍不住惊喜道:

“哇大哥,这个机子好厉害!真的能把稻粒脱下来啦!”

林善言见滚轴当真有用,心里也是高兴,但很快,便发现了弊端。

手摇太吃力了,摇了没多久,他胳膊就发酸了。

“让我来摇。”杨大桃见状,忙上前去帮忙,抓起手柄就快速地摇了起来。

她到底天生神力,摇了许久也不觉着累。

“这个机子好,今年咱家的稻谷脱粒就靠它了。”杨大桃摸着打谷机笑道。

林善言却摇了摇头:“不行,还是得改良一下。”

像杨大桃这样有神力的可不常见,这机子造出来总不能只有她一个人能用吧?

任芸也上手试了一下,结果以她的力气,更是摇不了几圈就不行了。

眼前这个这个打谷机跟前世的手动打谷机确实还有点差距,她虽然清楚差距在哪里,但却不好明说。

只得道:“摇起来是费力,会不会是这个滚轴太重了?”

林善言思量着点点头:“滚轴的木板确实厚了,可以改薄一些……”

他又蹲下身查看了一下齿轮:“木头做的齿轮不大耐用,若是时间长怕是容易磨损掉。”

谭老爷子闻言道:“这个小问题,可以换成铁的。”

林善言也是这个想法,只是铁齿轮价格可比木头的贵多了。

好在他如今手头有不少银子,家里人也支持他搞研究,不然按照从前的情况,他才舍不得换成铁的哩!

说改良就改良,林善言立马就去镇上的铁匠铺,找铁匠师傅定做齿轮。

这次铁匠师傅啥也没问,笑呵呵地应下了。反正给足了赶工的钱,管他干啥的哩。

于是两日后,任芸便看到了打谷机改良版。

她瞧了一眼便挺惊讶,因为改良版的打谷机,同前世的手摇打谷机已经非常接近了。

齿轮换上了铁质的,滚轴的木板改薄了许多,而且为了最大化减轻重量,还将原本密合的木板改成了木条。木条之间保持与木条等宽的间距,既减轻了重量,又让稻粒不至于堆积在滚轴里,能顺利落下去。

最另任芸惊讶的是,为了省力,林善言居然把单摇打谷机改成了双手摇。也就是滚轴两边各有一个手摇柄,可以两个人同时摇动。

这次试用,由任芸和林善举配合一起摇动。两个力气不算大的人,很轻松就把滚轴摇动了起来!

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