Re: 如果前叉彈簧長度改變會如何呢? - 重機
By Barb Cronin
at 2023-05-03T15:30
at 2023-05-03T15:30
Table of Contents
※ 引述《UpMe (BigGG)》之銘言:
: 小弟最近想改裝前叉彈簧和重新灌油
: 廠商報給我我的長度 和我原廠的比 長多了5mm
: 請問多了這樣的長度 塞進去前叉後
: 會不會有問題呢? 謝謝
: ----
: Sent from BePTT on my Xiaomi 2201116SG
為了簡單化你的問題,本文只討論彈簧,不討論阻尼器,而且把兩根前叉等效為一根彈簧
然後假設彈簧為等距彈簧,為什麼要這樣?因為不等距彈簧會影響彈簧壓縮前後段的k值
假設有預載20公斤下,你要先有20公斤的力上去之後彈簧才會開始壓縮,沒有預載的話彈簧會直接壓縮,請見示意圖
http://i.imgur.com/bklYZRO.jpg
(沒有預載的情況,彈簧長度稱作自由長度)
也就是說你看到老闆拿在手上的還沒用過的彈簧就是他的自由長度啦,他把那個多了5公分的彈簧塞進你的前叉就等於是幫避震器加了預載。
另外,
因為k值一樣,肥宅坐上有預載的彈簧,壓縮量就是比較少,這表示彈簧有多的壓縮行程做上下甩動,這也是為什麼人越重要加更多預載,原因是讓你和瘦的人坐下去會有一樣的彈簧下沉量
-----
Sent from JPTT on my Asus ASUS_I01WD.
--
: 小弟最近想改裝前叉彈簧和重新灌油
: 廠商報給我我的長度 和我原廠的比 長多了5mm
: 請問多了這樣的長度 塞進去前叉後
: 會不會有問題呢? 謝謝
: ----
: Sent from BePTT on my Xiaomi 2201116SG
為了簡單化你的問題,本文只討論彈簧,不討論阻尼器,而且把兩根前叉等效為一根彈簧
然後假設彈簧為等距彈簧,為什麼要這樣?因為不等距彈簧會影響彈簧壓縮前後段的k值
假設有預載20公斤下,你要先有20公斤的力上去之後彈簧才會開始壓縮,沒有預載的話彈簧會直接壓縮,請見示意圖
http://i.imgur.com/bklYZRO.jpg
(沒有預載的情況,彈簧長度稱作自由長度)
也就是說你看到老闆拿在手上的還沒用過的彈簧就是他的自由長度啦,他把那個多了5公分的彈簧塞進你的前叉就等於是幫避震器加了預載。
另外,
因為k值一樣,肥宅坐上有預載的彈簧,壓縮量就是比較少,這表示彈簧有多的壓縮行程做上下甩動,這也是為什麼人越重要加更多預載,原因是讓你和瘦的人坐下去會有一樣的彈簧下沉量
-----
Sent from JPTT on my Asus ASUS_I01WD.
--
Tags:
重機
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