Lockable suspension system for a work vehicle having a stabilizing link

A lockable suspension system for a work vehicle having a stabilizing link, which supports a chassis frame on a pair of front and rear wheel axles, and which during working causes load in the vertical direction, in the lateral direction, and in the longitudinal direction of said vehicle from said chassis frame to be transferred to said axles, comprising:

• a shock absorbing spring which is interposed between at least a one of said axles and said chassis frame;
• a pair of double acting cylinders which are provided at a fixed distance apart in the lateral direction of said vehicle, and whose tube sides and rod sides are respectively pivotally supported by said chassis frame and said axle;
• a link which connects said axle and said chassis frame and during working receives load in the longitudinal and in the lateral direction of said vehicle, whose linking point to said axle is engaged by a pin extending in the longitudinal direction of said vehicle to a portion of said axle central with respect to said vehicle, and whose linking point to said chassis frame is engaged by a pin extending in the longitudinal direction of said vehicle to a side portion of said chassis frame, said linking points to said axle and said chassis frame having side walls, respectively, perpendicular to the longitudinal direction of the vehicle and opposed to each other, said side walls being in contact with receiving walls provided on said chassis frame and axle so that said load in the longitudinal direction can be received by contact of said side walls with said receiving walls;
• and,
• a changeover means which by locking said double acting cylinders obstructs the action of said shock absorbing spring, and by freeing said double acting cylinders permits the action of said shock absorbing spring;
• wherein,
• intermediate portions of said double acting cylinders are engaged by pins to said chassis frame respectively;
• said shock absorbing spring comprises a pair of lamellar springs which are respectively fixed on the lower surface of said axle as spaced apart by a fixed amount in the lateral direction of said vehicle and which extend in the longitudinal direction of said vehicle;
• respective spring receiving portions are provided to the lower surface of said chassis frame as spaced apart by a fixed amount in the lateral direction of said vehicle;
• and,
• said chassis frame is supported via said pair of spring receiving portions on the upper surfaces of both end portions in the longitudinal direction of said vehicle of said lamellar springs in a state which permits displacement in the lateral direction of said vehicle.

A lockable suspension system for a work vehicle having a stabilizing link, which supports a chassis frame on a pair of front and rear wheel axles, and which during working causes load in the vertical direction, in the lateral direction, and in the longitudinal direction of said vehicle from said chassis frame to be transferred to said axles, comprising:

• a shock absorbing spring which is interposed between at least a one of said axles and said chassis frame;
• a pair of double acting cylinders which are provided at a fixed distance apart in the lateral direction of said vehicle, and whose tube sides and rod sides are respectively pivotally supported by said chassis frame and said axle;
• a link whose one end is linked to said chassis frame while the other end is linked to said axle so as to restrain horizontal displacement in the longitudinal and in the lateral direction while permit displacement in the vertical direction between said chassis frame and said axle, which during working receives load in the longitudinal and in the lateral direction of said vehicle, and comprising a linking member which extends from the linking point to said chassis frame to the linking point to said axle and a reinforcing member which reinforces said linking member in one direction among the longitudinal direction and the lateral direction of said vehicle in which the strength of said linking member is relatively low, said linking points to said axle and said chassis frame having side walls perpendicular to the longitudinal direction of the vehicle and opposed to each other, said side walls being in contact with receiving walls provided on said chassis frame and axle so that said load in the longitudinal direction can be received by contact of said side walls with said receiving walls;
• and,
• a changeover means which by locking said double acting cylinders obstructs the action of said shock absorbing spring, and by freeing said double acting cylinders permits the action of said shock absorbing spring.