The present invention relates to a vehicle transmission structure, which is mainly used for a power source connected to a speed reducer whose first shaft sprocket is connected to a rotating shaft, and a second sprocket is connected to the housing of the differential, and is first A chain is connected between the sprocket and the second sprocket, and an adjusting block is respectively arranged on the hanging portion of the chain, thereby adjusting the block to prevent the chain from maintaining good tightness and avoiding insufficient tension of the chain. In the case of loss of power transmission and shedding, etc., the two suspension blocks are respectively designed to resist the suspension of the chain, so that the tension of the suspension can be avoided. When the power source turns, the slack is pulled instantaneously. Damage and frustration are likely to occur immediately, and accordingly, the benefits of improving the service life of the chain and the smoothness of the travel of the vehicle are achieved.本創作係有關於一種載具傳動結構，係主要於動力源連結之減速器其轉軸組接有第一鏈輪，並於差速器其殼體組接有第二鏈輪，且於第一鏈輪與第二鏈輪間以一鏈條繞設連結，另於該鏈條二懸空段處分別抵設有一調節塊，藉此調節塊抵掣，以使鏈條維持良好鬆緊度，避免鏈條因張力不足發生動力傳遞損失與脫落等情形，另藉由二調節塊分別對鏈條二懸空段進行抵掣設計，即可避免鏈條其一懸空段張力不足，當動力源轉向等時，鬆弛懸空段瞬間被拉緊時易發生損壞及頓挫情況，據此，俾達到提高鏈條使用壽命及載具行進順暢性等效益。
