A direct-drive mechanism is a mechanism design where the force or torque from a prime mover is transmitted directly to the effector device (such as the drive wheels of a vehicle) without involving any intermediate couplings such as a gear train or a belt. == History == In the late 19th century and early 20th century, some of the earliest locomotives and cars used direct drive transmissions at higher speeds.
A direct-drive mechanism is a mechanism design where the force or torque from a prime mover is transmitted directly to the effector device (such as the drive wheels of a vehicle) without involving any intermediate couplings such as a gear train or a belt. == History == In the late 19th century and early 20th century, some of the earliest locomotives and cars used direct drive transmissions at higher speeds.
Source: Wikipedia "Direct-drive mechanism" · CC BY-SA 4.0
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