Provided is a modular electric wheel set of a walking aid, which is installed in a holder of the walking aid to provide the required motive power. An electric motor is used to drive a wheel hub through a speed reduction mechanism to perform a speed reduction rotation, so that the walking aid uses electric power as a motive power source to make a slow movement. At the same time, there is an electromagnetic brake arranged inside the same structure. When the supply of electric power source is terminated, the electromagnetic brake immediately stops the movement of the walking aid. In implementation, the electric motor and the electromagnetic brake are integrated in one body, or are separated into two units that can be folded to adjust the width. Such a modular design can reduce the assembling cost and further improve the stability and safety in use.一種助行器之模組化電動輪組,供安裝於該助行器之一支架而提供所需之動力者,其使用一電動馬達經過一減速機構而帶動一輪殼作減速轉動,使該助行器以電力作為動力源作緩慢移動,同時,在同一結構內設有一電磁煞車,當電力源停止供輸時,則該電磁煞車會即時停止該助行器的移動。具體實施時,將該電動馬達及該電磁煞車整合於一體,或分開成可折收調整寬度的二個單體,其模組化設計而能降低組裝成本,並可進一步提昇使用時的穩定性及安全性。1‧‧‧助行器之模組化電動輪組11‧‧‧固定架111‧‧‧固定孔112‧‧‧組接部12‧‧‧固定軸13‧‧‧輪殼131‧‧‧隔板132‧‧‧第一容置空間1321‧‧‧容置槽134‧‧‧軸承135‧‧‧輪胎136‧‧‧輪胎護蓋14‧‧‧電動馬達141‧‧‧定子142‧‧‧轉子15‧‧‧減速機構151‧‧‧環齒輪152‧‧‧行星齒輪支架153‧‧‧行星齒輪154‧‧‧太陽齒輪16‧‧‧電磁煞車162‧‧‧煞車本體163‧‧‧電磁鐵164‧‧‧活動煞車片165‧‧‧連動片166‧‧‧煞車解除器167‧‧‧煞車本體側蓋168‧‧‧彈性件
