A load-bearing wheel device for an agricultural machine crawler is a plurality of load-bearing wheels that are mounted on the agricultural machinery body and are freely rotatable against the inner side of the lower edge crawler. Each of the load-bearing wheels is mounted on a plurality of wheel frames of the shaft disposed on the agricultural machinery body. At both ends, at the same time, the two ends of each wheel frame are respectively fixed to one axle, and the two ends of the wheel axle are respectively installed through the bearing to install the roller, so that the roller at both ends of the wheel frame can swing up and down like a seesaw. Therefore, when the agricultural machinery is driving on an uneven ground or turning or turning, the load wheels that are subjected to abnormal loads at both ends of the axle are freely rotatable because they are mounted on the axle through the bearings, so that the abnormal load is in the first At one time, the load wheel on the side and the bearing are respectively interfered with each other and do not interfere with the other side, so that the abnormal load is minimized, so that the bearing in the load wheel and the load wheel which is the most wearable and consumed is prolonged. Lifespan, and when it is damaged, you only need to replace the one-side load wheel and its bearings, which makes maintenance easier and reduces maintenance costs.一種農機履帶的負重輪裝置，是裝設在農機機體上的數個抵住下緣履帶內側而可自由轉動的負重輪，各負重輪是裝在軸設於農機機體上的數個輪架的兩端，同時各輪架的兩端是各別固定一輪軸，並令輪軸的兩端分別再透過軸承而裝設該負重輪，即令輪架兩端的負重輪可如翹翹板狀的上下擺動，故當農機在不平的地面上行駛或轉彎、迴轉時，輪軸兩端所承受不正常負荷的負重輪，因係透過軸承而裝設在輪軸上可自由轉動，因此讓不正常的負荷在第一時間，即分別由該側的負重輪與軸承承受而與另一側互不干涉，使不正常的負荷降至最低，故令最容易磨損消耗之負重輪及負重輪內的軸承得以延長使用壽命，並在其損壞時，則只需更換單側之負重輪及其軸承即可，進而讓維修更為簡單容易與降低維修的成本。
