Truck steering hydraulic force assisting oil cylinder and production process thereof

Abstract

The invention relates to a truck steering hydraulic force assisting oil cylinder and a production process thereof. The truck steering hydraulic force assisting oil cylinder comprises a cylinder barrel, oil nozzle joints, a piston and a piston rod. A guide sleeve is arranged in one end of the cylinder barrel, and a supporting seat is welded to the other end of the cylinder barrel. The guide sleeve and the cylinder barrel are fixedly connected through a steel wire check ring. The oil nozzle joints are welded to the cylinder barrel and the supporting seat. The guide sleeve is divided into a front part and a rear part, wherein the diameter of the front part is larger than that of the rear part. The piston rod penetrates the guide sleeve. Two sealing annular grooves are formed in the guide sleeve along the inner diameter. A sealing annular groove and a steel wire check ring groove are formed in the guide sleeve along the outer diameter. The production process sequentially includes the following steps of cylinder barrel rough machining, cylinder barrel wall drilling, oil nozzle joint welding, cylinder barrel inner hole finish machining, welding of the oil nozzle joints on the supporting seat, guide sleeve installation and other component installation. The oil nozzle joints are welded to the cylinder barrel more firmly, and outward leakage is avoided. After the oil nozzle joints are welded to the cylinder barrel, a cylinder barrel inner hole is subjected to finish machining, and the cylindricity and straightness of the cylinder barrel inner hole can be guaranteed.

Description

Technical field [0001] The invention relates to a booster oil cylinder and its production process, in particular to a hydraulic booster cylinder suitable for the steering of double-axle trucks with various cylinder diameters and its production process. Background technique [0002] In recent years, with the rapid increase in material flow, the market's demand for heavy vehicles has greatly increased. Regarding the design of heavy-duty vehicles, not only the axle load limit, but also the feasible structure must be considered. The simple and easy way is to increase the number of axles, and double front axle vehicles have become a new trend in development. [0003] In order to ensure that the dual-front axle trucks are sensitive in steering and easy to operate, a dual-assisted cylinder system came into being. However, the existing double-axle truck steering hydraulic cylinder structure has many defects. First, the nozzle joint is connected to the guide sleeve through the oil cylind...

AI Technical Summary

Problems solved by technology

First, the oil nozzle joint is threaded and the end face seal is connected to the guide sleeve through the oil cylinder, which is prone to loosening and leakage

Second, the steel wire retaining ring is round, with a diameter of φ3.2, and the design requires that the inner diameter of the cylinder barrel and the R1.8 ring groove be within 0.05mm of coaxiality, which increases the difficulty of processing and cannot guarantee the coaxiality requirement.

Third, because the material of the guide sleeve is 45#, and the material of the piston rod is also 45# tempered material, the axial movement between the two must use a bushing in the middle to prevent wear, and the bushing is open. Pressed into the guide sleeve, the coaxiality of the guide sleeve assembly cannot be guaranteed, resulting in partial wear of the piston rod and cylinder, resulting in internal leakage

Images