三改小青蛙#田宫The Frog
上次改完就吃灰了，收拾家发现轮胎都开裂了，正好天气暖和了，草地也绿了，遂决定整备整备，下草坪娱乐跑。http://image.rcfans.com/pic/20230415/1681538605874952144.jpg?x-oss-process=image/watermark,image_cGljLzIwMjExMDA2L29zc18xNjMzNTM0ODIxOTgzXzg2NF81MzNfNTYucG5n,t_50,g_se,x_20,y_20
本来只是打算配好电设下地，然后就发现2.0版本有些问题，不得不又双叒进行了大改…
首先是后摆臂用了贯穿轴+轴承，虽然顺滑了，但是为了保证强度3D打印的很厚，簧下质量重了很多，同时，打印件表面不是很光滑，与车架链接处还是有些摩擦。
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因此最后还是决定用回装摆臂。恰好原装摆臂外侧有个大洞，内侧是个突出的轴，所以内外都可以用轴承联接，再次避免了原车摆臂需要在外面直接上油的问题。
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第二是前悬挂整体比较复杂，很难调整到顺滑，而且碳纤维板堆叠的前摆臂组装起来太麻烦，因此最后还是决定用回装摆臂*2。其实用的是blackfoot的前摆臂套件，虽然青蛙的套件金属件更多，但是铝合金弯折件精度要差些，很难调整虚位。0.1+0.5mm垫片垫到想吐，好在最后效果还不错，再配合从田宫雷龙上抄来的卧式前悬挂，给了一个扭矩，摆臂基本上没有虚位了。
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都用原装的也好，保证了身体+四肢都是青蛙的，组合度也会很高。
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第三部分是这次改动最大的地方，就是波箱。早有耳闻说这个系列的波箱比较脆弱，暴力驾驶会有问题，但是我没遇到过。促使我改波箱最大的原因是，原装波箱马达太偏了！看着难受！同时改了波箱才能和摆臂内侧的轴承配合，达到丝滑的效果。
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波箱改造主要参考了truckmaster的一个套件，不同的是truckmaster第一级减速是齿轮传动，为了维护方便，我改了全皮带传动，考虑到对这台车定位是草地遛弯，开放皮带传动问题应该不大。
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另外，truckmaster套件有两块儿金属片组成波箱外壳，一定程度上中置了马达，但我觉得还是有点偏，所以设计了一个马达座，使马达更加居中。整个波箱由五片碳纤维板组成，考虑到散热问题，最终马达座用了铝合金的。
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考虑到皮带使用中可能会松弛，做了一个张紧轮。
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另外改动比较大的就是转向机构，2.0版改了舵机中置，虽然解决的左右对称问题，但是因为摆臂的长度和转向拉杆长度相差太大，导致摆臂在上下运动过程中会影响轮胎的角度，所以，加了一组转向组，缩小两者的长度差，尽量减小干涉。 同时配合两块底板把车架封起来，整体看起来更加整齐。
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虽然感觉跑草坪皮带传动开放问题不大，但还是定制了一个底壳防护，还没做好，等到了，装上再下地跑。
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再上几张图
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记错了，是trackmasterhttps://app.rcfans.com/public/emotion/face_wulian.png 改的太帅了诱人 改的漂亮 这车还有原装件吗https://app.rcfans.com/public/emotion/face_wulian.pnghttps://app.rcfans.com/public/emotion/face_wulian.pnghttps://app.rcfans.com/public/emotion/face_wulian.png 瞧这俗名 发表于 2023-04-15 17:09
改的太帅了诱人
过奖了，这次改借鉴比较多 苦命娃 发表于 2023-04-15 18:54
改的漂亮
最后一版了，再不改了https://app.rcfans.com/public/emotion/face_wulian.png 壹合 发表于 2023-04-16 10:19
这车还有原装件吗
除了波箱，剩下基本都是原装的https://app.rcfans.com/public/emotion/face_jizhi.png 太美了https://app.rcfans.com/public/emotion/face_001.png 这个波箱改的牛皮啊，厉害厉害