초록 ▼

An endless track assembly is disclosed to increase the ability of conventional tractors to travel over soft ground. The endless track assembly comprises a supporting frame detachably secured under the front of a conventional tractor body having driving wheels protruding from the sides of the body at

An endless track assembly is disclosed to increase the ability of conventional tractors to travel over soft ground. The endless track assembly comprises a supporting frame detachably secured under the front of a conventional tractor body having driving wheels protruding from the sides of the body at the back of the latter, a first pair of endless track-mounting assemblies attached to the rear of such supporting frame, a support member secured to each track-mounting assembly and detachably secured under the rear of the tractor body, a second pair of endless track-mounting assemblies pivotally mounted to the front of the supporting frame and extending forwardly of the tractor body, idler wheels at the back and front and of said first and second pairs of endless track-mounting assemblies, hydraulic cylinder units mounted on the tractor for raising such second pair of endless track-mounting assemblies on the supporting frame and endless tracks trained on and surrounding the driving and idler wheels.

대표청구항 ▼

An endless track assembly for a conventional tractor having a body with a rear end, a front end, sides and a bottom, and equipped with a pair of rear endless track-driving wheels located at said rear end and protruding from said sides and rotatable about a horizontal transverse rotational axis which

An endless track assembly for a conventional tractor having a body with a rear end, a front end, sides and a bottom, and equipped with a pair of rear endless track-driving wheels located at said rear end and protruding from said sides and rotatable about a horizontal transverse rotational axis which is fixed relative to said tractor body, said assembly comprising: (a) a supporting frame detachably secured to the front portion of said bottom and extending transversely of said tractor body underneath the latter; (b) a pair of rear endless track-mounting assemblies attached at their front ends to the rear of said supporting frame and extending longitudinally of said tractor body externally of each side thereof, below the level of said bottom and vertically aligned with and below said rear driving wheels and projecting at their rear ends rearwardly from said rear driving wheels; (c) a support member secured to, and upstanding from, the rear portion of each track-mounting assembly and detachably secured at its upper end to the rear portion of said tractor body; (d) a pair of front endless track-mounting assemblies pivotally mounted at their rear ends to the front of said supporting frame about a transverse horizontal pivot axis for upward pivotal movement in vertical planes on each side of said tractor body from a lowered position in longitudinal alignment with the respective rear endless track-mounting assemblies, said pair of front endless track-mounting assemblies projecting at their front ends forwardly of the front end of said tractor body externally of each side thereof; (e) power means mounted on the tractor body for pivoting the pair of front endless track-mounting assemblies on said supporting frame; (f) a rear idler wheel rotatably mounted at the back of each rear endless track-mounting assembly and positioned below and rearwardly of the respective rear track-driving wheels; (g) a front idler wheel rotatably mounted at the front end of each front endless track-mounting assembly; (h) an endless track trained on and surrounding the driving and idler wheels, one on each side of tractor body, whereby said driving wheels as well as said idler wheels engage the inside of said endless tracks; (i) load-carrying wheels engaging the inside of said endless tracks and rotatably mounted at the underside of said pairs of rear and front endless track-mounting assemblies for rotation about fixed rotational axes relative to said endless track-mounting assemblies, said load-carrying wheels lying in a common plane when said front endless track assemblies are in lowered position; (j) the portion of each endless track extending from said front idler wheel to said driving wheel being progressively spaced from and above the associated pair of rear and front endless track-mounting assemblies when the latter is in lowered position; and (k) support means for supporting the upper run of said endless track between said front idler wheel and said rear driving wheel when said front track-mounting assembly is in raised position.