有冇師兄可以解答以下問题:
1) 那裡可以買(零售)到如图-1 及 图-2 紅圈內的小金屬齒輪及大塑膠齒輪?
2) 大小齒輪的齒比有冇1:10 至 1:20 的範圍呢 (如图-3 所示)?
3) 那裡可以買(零售)到如图-3所示的未完成的小金屬齒輪及大塑膠齒輪組合?
4) 大齒輪如何接上螺絲杆(如图-3所示)?
5) 那裡可以買(零售)到有迫帽螺絲仔的小金屬齒輪(如图-3所示)?
6) 那裡可以買(零售)到如相片A-C的齒輪?
7) 那裡可以買(零售)到一個馬達及齒輪減速箱的組合?
機械問題: 馬達及齒輪減速組合
- PeterPeter
- 夸克星
- 文章: 2653
- 註冊時間: 週四 30 11月, 2006 13:25
機械問題: 馬達及齒輪減速組合
- 附加檔案
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建議你到深圳賽格尋找,可能還可以找到有專門訂制減速箱的店鋪(我的朋友說多年前曾經見過)。
在網上可以在淘寶網找齒輪或減速箱或機械人配件的店子,例如是:
http://store.taobao.com/shop/view_shop- ... a57137.htm
http://store.taobao.com/shop/view_shop- ... fa2f5d.htm
在網上可以在淘寶網找齒輪或減速箱或機械人配件的店子,例如是:
http://store.taobao.com/shop/view_shop- ... a57137.htm
http://store.taobao.com/shop/view_shop- ... fa2f5d.htm
It is mainly to lower the cost.鄧登凳 寫:一個愚蠢但困擾我的問題想請教各位自製儀器大師:
似乎在自製追蹤腳架時, 或在很多廠製的天文儀器, 包括赤道儀的電跟、goto經緯儀、齒式伸縮調焦(rack-and-pinion focuser)等, 都用直齒(spur gear)而不用斜齒(helical gear), 是什麼理由呢?
在汽車上, 要準確控制的部件, 如轉向控制(軑尺), 燃油噴注系統等, 多數會用斜齒。因斜齒一般會有較順滑的操作, 和較小的虛位。那為何沒有在天文儀器上出現呢?
Helical gears are more expensive.
It is the same reason for worm gears. The best "worm" would not be a straight cylindrical worm, but should be narrower in the middle but thicker at the 2 ends. This is to increase the "contact". However, I have not seen one such worm for a long time.
PTS
For telescopes (I found that only Galileo Dobs have helical rack-and-pinion focuser) and mounts that cost more than HK$3000 a piece, is the price difference between the gears that significant??PTS 寫:
It is mainly to lower the cost.
Helical gears are more expensive.
It is the same reason for worm gears. The best "worm" would not be a straight cylindrical worm, but should be narrower in the middle but thicker at the 2 ends. This is to increase the "contact". However, I have not seen one such worm for a long time.
PTS
誰在線上
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