《 聯 軸 器 》
聯軸器介紹與特性 Coupling Features
聯軸器是連接兩軸使之供回轉並傳遞安全轉矩的一種機械裝置。一般聯軸器可分為撓性與剛性聯軸器兩
大類。當動力傳達兩軸要配置成一直線發生困難時，或者兩軸之安裝非常簡單時，應使用可撓性聯軸
器，它具有緩和衝擊、吸收平行、偏角、軸向位差、改善系統傳動動力特性的功能，因此在安裝時，即
使軸發生少許之偏差而軸承也不會有勉強的情形，在市場上應用非常廣泛，而剛性聯軸器為一無法造成
偏心、偏角之元件，能使被連接的兩軸固定成為一體。因此使用上同心度必須要求非常高。
◆聯軸器的選擇要件：
依據機械特性、系統運作來選用適合的聯軸器型式：
1.『扭力大小』
聯軸器的扭力應為傳動扭力较大值的二倍，例：若傳動扭力值為5(N.m)，則應選擇扭力值10(N.m)
的聯軸器；材質以鋼質的扭力為佳。
2.『撓性／剛性』
撓性聯軸器可吸收平行偏差、角度偏差、軸向位差；高剛性聯軸器則無，因此軸端的精準度必須非
常高。
3.『適用的場合—高低溫、酸、鹼?』
須慎選聯軸器之材質，其是否可以負荷酸、鹼、较低溫之場合。
4.『有無背隙』
5.『絕緣性』
6.『抗震性』
7.『可承受的较大轉速』
8.『具有保護機台的安全性』
9.『孔徑範圍是否適用』
A coupling is a machinery device used to connect two shafts together at their ends for the purpose of rotation and
transmitting power. Generally, there two main types of coupling, flexible coupling and rigid coupling. When two
power-transmitting shafts perform a complete centering is very difficult work, or shafting is very easy, flexible
coupling provides thrust moderation, and accommodates parallel, angular and axial misalignment to optimize the
transmission system. Therefore, when installing, few degrees of shafts misalignment will not be constrained to
shafts. This coupling has wide range of application in the market. Rigid coupling provides free parallel
misalignment and angular misalignment to firmly connect two shafts as one body. It highly requires precise
parallel and angular alignment.
◆How to select a coupling:
Choose an appropriate coupling in accordance with the intended use, machinery requirements and power
transmission.
1.
Torque: The torque of coupling is supposed to be twice as much as the max transmissible torque. For
example, if transmissible torque is 5 (N.m), then choose the coupling of 10 (N.m) torque; steel coupling of
high torque is preferred.
2.
Flexible/Rigidity: flexible coupling can accommodate parallel misalignment, angular misalignment and
axial end-play, while rigid coupling requires highly precise alignment.
3.
Applicable condition: high/low temperature, acidity, alkalinityˇ) it is required that coupling material must
withstａnd acidity, alkalinity and high/low temperature.
4. With or without backlash
5. Electrical Insulation
6. Vibration resistance
7. Allowable max. rotational frequency
8. Protection to the machinery
9. Appropriate bore diameter range
Introduction
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