dabaoxiaobao131 发表于 22-4-4 20:30:09

baja改童车

忙里偷闲给闺女用baja改了辆童车,公园飙起来https://app.rcfans.com/public/emotion/face_018.png
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补充内容 (23-6-18 10:39):
挺长时间没看这个帖子了,发现热度还挺高,感谢大家顶帖,也希望有更多的人都能喜欢玩模型喜欢diy。关于这辆车的一些设计、制作的重点内容整理了一下分享给大家。(补充一次只能200个字,一条一条发吧。。。)

补充内容 (23-6-18 10:41):
200个字好像都不行,补充的内容见74楼吧。。。。

补充内容 (23-6-18 10:43):
74楼已置顶,没用过这功能,还挺好用...

dabaoxiaobao131 发表于 23-6-18 10:41:56

挺长时间没看这个帖子了,发现热度还挺高,感谢大家顶帖,也希望有更多的人都能喜欢玩模型喜欢diy。关于这辆车的一些设计、制作的重点内容整理了一下分享给大家。(补充一次只能200个字,一条一条发吧。。。)

关于车辆控制:总的原则就是巧用继电器来作为开关接通、断开不同的线以实现不同的功能,甚至需要用继电器再来控制继电器,总之发挥想象力把需要的功能以开关的形式分解开就行。这个车其实所有的零件设计加工都用不了多长时间,就是这个控制上废了不少脑筋研究了好久才想出这么一个不需要什么电路基础不会自己制作电路板写程序的前提下以最原始的方式制作车辆的控制系统。(大家只要研究明白继电器和pwm信号继电器的工作原理、方式基本就能看懂我下面描述的内容了。或者孩子如果孩子大点的话不需要家长控制车辆那么就不需要这么复杂的接线了,也不需要用继电器)(如果有电路基础会焊电路板的那么估计这些功能一张小板子就都解决了,而且稳定性肯定比我这种方法好)。

1.关于车辆、遥控器切换控制。主要需要用到的元件是继电器,我选的是8路的继电器,继电器公共端接的是车辆电调、方向舵机的信号线,常开端接车辆油门踏板信号线、方向盘电位器信号线,常闭端接遥控接收机的方向通道、油门通道信号线(在油门通道上需要加一个pwm信号转为电动车调速器信号的转换器,将转换器的信号线再接入电位器的常闭端,这样就可以通过遥控器控制电动车的电机了)。在前面所述继电器的基础上再用一个pwm信号继电器(一路、双线就可以),这个继电器信号端插接收机三通道,两路输出线接前面8路继电器的开闭控制线(这个pwm信号继电器作为前面8路继电器的控制器),这样就可以通过遥控器的三通道控制8路继电器常开端、公共端的开闭,进而实现切换车辆由驾驶员控制还是由遥控器控制的功能。

2.关于倒车。驾驶员控制模式下只需按动方向盘上的开关(接调速器倒车线)即可实现倒车。遥控器控制模式下需要按住第四通道开关(这个通道接一个pwm信号继电器,继电器再接调速器的倒车线,作为倒车开关)切换至倒车模式。

3.关于刹车。驾驶员控制模式下踩下刹车踏板刹车(电动车调速器有电子刹车功能),但是这个功能刹车线性不咋好,就像普通模型车电调的刹车功能差不多,其实可以通过做一根踏板拉线连接baja碟刹,这样线性好点。遥控器控制模式下,把遥控器的油门通道也接一个pwm信号继电器,在遥控扳机往前推时pwm继电器打开(这个继电器的两个接线端直接接到电调调速信号线上,也就是直接切断电调信号来源),车辆电机不再运转失去动力,同时遥控器油门通道用y线再并联一个舵机,这个舵机直接用作baja碟刹的刹车舵机,这样的话就可以在不管是驾驶员控制或是遥控器控制模式下,只要向前推动油门扳机即可立即实现刹车功能,保证在任何情况下家长都能通过遥控器紧急刹车。(这样接线不管是前进还是倒车遥控器的油门扳机都是向下压电机才运转,也就是可以理解成不管车辆前进还是倒退都是向下踩油门才走,只是倒车时需要先挂上倒挡再踩油门,这一点和一般遥控模型控制上有点区别)

关于车辆的零件,我直接上传了cad图,按照这个加工就可以(零件中有一个孔位错了,好像是底盘上的,具体哪个忘了,自己电钻打孔也行)。设计图这东西其实很灵活,想要啥样的就画啥样的,反正diy的精髓不就是玩么,现在小孩大点了这个尺寸不太适用了,最好设计成可伸缩的车架结构,既能放进后备箱,又能调节长短适用不同年龄孩子,最近空闲时间不多没有做新的设计。

tianxin521314 发表于 22-4-4 20:49:26

牛.......牛批

锋爷 发表于 22-4-4 20:50:40

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dabaoxiaobao131 发表于 22-4-4 20:52:44

收辆baja,拆解、测量、构思、画图、加工….原计划是用losi xl改,考虑到后期配件太少,而且四驱结构占空间太大所以放弃了。
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dabaoxiaobao131 发表于 22-4-4 20:56:37

动力部分是300w的无刷电机+电动车控制器,9个档位,可手动加减档,带屏幕操作很方便,速度区间大,目前孩子还小,最多只敢用3档https://app.rcfans.com/public/emotion/face_018.png,电池直接用48v12ah电动车锂电池,这玩意续航那是相当长了…
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dabaoxiaobao131 发表于 22-4-4 21:00:09

在设计时按电机的地方出来一截尾巴,原计划是在上面安一个大人能坐的座椅,后期放弃了,导致后面部分设计有点突兀,以后再在后面给安个篮子吧,还能放点东西
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dabaoxiaobao131 发表于 22-4-4 21:05:14

最满意的是方向盘,很有厚重感。遥控第四通道切换车辆控制(驾驶员控制、遥控器控制)
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dabaoxiaobao131 发表于 22-4-4 21:10:09

最后再来几张吧,这个几个避震换了粗弹簧,整车40多斤,跑起来悬挂表现很不错,柏油路、石子路、草坪姿态都不错,还能在土路玩点轻微越野,隔壁的小孩都馋哭了https://app.rcfans.com/public/emotion/face_018.png
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lnmyc 发表于 22-4-4 21:38:11

神人啊啊啊

烟酒僧丶 发表于 22-4-4 21:52:30

牛逼啊
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