Structure of a running system in a work vehicle
AssigneeKubota Corporation
InventorMasao Nakagawa
Life of this patent
Estimating the term…
Abstract
A structure for a running system, in a work vehicle, has right and left running wheels, hydraulic cylinders extensible and retractable in opposition to each other in response to axle-tilting displacement of the wheels as they rise and lower in turn in opposition to each other, a conduit connecting the cylinders with each other with an on-off valve interposed therein to be arbitrarily maneuverable thus to enable the lock up of both cylinders, and, a supply conduit made connectable to the cylinder-connecting conduit. There are provided valves in order to permit oil to be supplied only when inner pressure within this cylinder-connecting conduit has dropped to show negative pressure below a preset threshold.
Claims4
A structure for a running system in a work vehicle, with provision of right and left running wheels (1), (1), hydraulic cylinders (5), (5) with pistons which function as axle suspension means extensible and retractable in opposition to each other in response to axle-tilting displacement of the wheels as the wheels rise and lower in turn in opposition to each other, a conduit (a) connecting the cylinders (5), (5) to each other with an on-off valve (10) interposed therebetween to be arbitrarily maneuverable to lock up both cylinders (5), (5), and a conduit (17) made connectable to said cylinder-connecting conduit (a) for supplying oil to fill any of the cylinders (5), (5), characterized in that the oil-supply conduit (17) is connected to the on-off valve (10) by bifurcation branch passages (k, n, m,;
- k,n,m) to both lateral sides thereof where the cylinder-connecting conduit (a) is respectively connected, and that in both the bifurcation branch passages (k,n,m;
- k,n,m,) there are provided, respectively, valves (11), (11) adapted to supply oil from said supply conduit (17) to said cylinder-connecting conduit (a) only when the inner pressure within this cylinder-connecting conduit (a) has dropped to a negative pressure below a preset threshold.
Dependencies are inferred from the claim text.