Cardan type trolley

…An axle without a drive unit is called a driven axle, and a bogie consisting only of a driven axle is called a driven bogie. Among the driven bogies, there is a type called a cardan bogie, which is a type in which part of the drive unit, such as the electric motor, is attached to the bogie frame or car body, and the driving force is transmitted to the wheel axle under the spring using a universal joint or a flexible axle. Compared to a hanging bogie, in which one end of the electric motor is placed on the driving axle, the load on the unsprung part is reduced, which gives better running performance and is currently widely used. A bogie in which the drive unit shaft is parallel to the axle is called a parallel cardan type, and one in which it is perpendicular to the axle is called a right-angle cardan type. …

*Some of the terminology explanations that refer to "cardan bogies" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…駆動装置のない軸は従軸と呼ばれ，従軸のみで構成されている台車は従台車という。動台車の中にカルダン式台車と呼ばれるものがあるが，これは電動機など駆動装置の一部を台車枠または車体に取り付け，自在継手やたわむことのできる軸を用いてばねの下にある輪軸へ駆動力を伝える方式のもので，電動機の一端を動軸上に乗せるつり掛け式台車に比べ，ばね下に加わる荷重が軽減されるため走行性能がよく，現在広く用いられている。駆動装置の軸が車軸に平行になっているものを平行カルダン式，車軸に直角になっているものを直角カルダン式と呼ぶ。…

※「カルダン式台車」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報