The invention provides a fork positioner capable of achieving a synchronous pitch adjustment function. The fork positioner comprises a fork frame body, a left fork and a right fork, wherein the right fork is in rolling connection with the fork frame body through a right bracket, and the left fork is in rolling connection with the fork frame body through a left bracket; two pitch controllable oil cylinders are fixedly arranged at the two side ends of the fork frame body respectively; the piston end of the right pitch controllable oil cylinder is connected with the left bracket; the piston end of the left pitch controllable oil cylinder is connected with the right bracket; the piston end of the right pitch controllable oil cylinder and the piston end of the left pitch controllable oil cylinder are connected in series through an oil pipe and then are connected with one end of a four-piece valve; the other end of the four-piece valve is connected with the other end of the right pitch controllable oil cylinder and the other end of the left pitch controllable oil cylinder through a flow distributing and collecting valve; two outlets of the flow distributing and collecting valve are connected with the two ends of a three-piece valve respectively. A three-piece valve oil path is connected with the two oil cylinders in series in the lateral movement process, the four-piece valve is connected with the two oil cylinders in parallel when the pitch is adjusted, synchronous pitch adjustment of the forks is ensured, and friction is reduced, so that the fork movement resistance is small, operation is flexible and synchronism of the two forks is ensured.
Fork positioner capable of achieving synchronous pitch adjustment function
2015-10-21
Patent
Elektronische Ressource
Englisch
IPC: | B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last |