Double-oil-cylinder hydraulic lifter for tractor

Abstract

A double-oil-cylinder hydraulic lifter for a tractor comprises a shell, long-strip-shaped grooves are formed in the inner walls of the front end and the rear end of one side of the shell respectively, lead screws with motors are installed in the long-strip-shaped grooves in a matched mode, nuts are arranged on the lead screws in a threaded fit mode, horizontal plates are fixedly installed at the opposite ends of the two nuts respectively, and oil cylinders are fixedly installed on the top faces of the horizontal plates. Through holes are formed in the front end and the rear end of the other side of the shell correspondingly, lifting shafts are installed in the through holes through bearings, and inner lifting arms are fixedly installed at the opposite ends of the two lifting shafts correspondingly. Under the condition that the terrain is flat, the two first telescopic rods stretch to drive the two inserting rods to move relatively, the inserting rods are inserted into the corresponding inserting grooves correspondingly, at the moment, the two long-strip-shaped plates are connected together under the action of the inserting rods, the two inner lifting arms and the two lifting shafts move synchronously, and through synchronous work of the two oil cylinders, the two inner lifting arms and the two lifting shafts move synchronously. And when the farm tool needs to be stopped at a certain height, the inner lifting arm can be fixed through the hovering locking mechanism, and the inner lifting arm is prevented from rotating again.

Description

technical field [0001] The invention belongs to the technical field of tractor accessories, in particular to a double oil cylinder hydraulic lifter for tractors. Background technique [0002] As the main tool of agricultural mechanization, tractor is the most widely used in agricultural production. It is the main power output source of various types of agricultural machinery, and it is also an important symbol of agricultural mechanization. At present, most domestic tractor lifters are composed of lifter housing, inner lift arm, lift shaft, outer lift arm, single-acting independent oil cylinder, piston, distributor, safety valve, descending speed regulating valve, force feedback subassembly, operation institutions etc. The lifter is an important working device of the tractor, and its performance stability directly affects the farming quality and efficiency of the tractor. However, the current method either raises the agricultural implement to the highest position, or lower...

AI Technical Summary

Problems solved by technology

However, the current method either raises the farm implements to the highest position, or lowers the farm implements to the lowest position, and cannot stop the farm implements at any position, which is inconvenient in use.

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