Novel structure and new welding method of oil inlet and outlet of hydraulic cylinder

Abstract

The invention provides a novel structure and a new welding method of an oil inlet-outlet of a hydraulic cylinder. The novel structure comprises a connector mounting holes, a joint body 2 with external threads and a nut 3,wherein the connector mounting hole is arranged on a cylinder body 1 and includes a cylindrical hole on the upper portion and a tapered bore on the lower portion, the tapered bore is larger than the cylindrical hole, and a boss with greater diameter than that of the threads is arranged on the lower part of the joint body 2. The new method is characterized in that: composing a mechanical sealing pair by the tapered bore on the cylinder body 1 and the outer-circumferential right-angle circumference line with big step on the joint body 2, simply tightening the nut 3 in assembling, taking the excircle of the cylinder body 1 as a fulcrum and tightening up the joint body 2, after closely integrating the sealing pair, welding the nut 3 to the cylinder body 1 and the joint body 2 to the nut 3 on the excircle with smaller current and welding joint. The sealing of the structure is replaced by the sealing pair between the joint body 2 and the cylinder body 1, the joint body 2 and the threads of the nut 3 bear the tensile strength, so that the dimensions of welding joint are smaller, electric current used in welding is smaller, and the innerstress and deformation in the welding of the joint body 2 and the cylinder body 1 are reduced.

Description

1. Technical field: [0001] The invention relates to a new structure and a new welding method of a hydraulic oil cylinder inlet and outlet joint. Two, background technology: [0002] In the process of human industrial civilization, hydraulic transmission and control systems have been widely used in the transmission and control of various mechanical equipment. [0003] In the existing hydraulic transmission and control technology, the hydraulic cylinder is currently the most widely used type of actuator. In almost every hydraulic transmission and control system or hydraulic transmission equipment, the hydraulic cylinder is one of the necessary components. Hydraulic cylinders have played an important role in the development of human mechanical equipment. [0004] With the development of hydraulic technology towards high-precision, high-pressure and high-speed operation, the welding deformation of the inlet and outlet of hydraulic cylinders has become a difficult problem that ...

AI Technical Summary

Problems solved by technology

In the cylinder barrel production process of hydraulic cylinders, the previous blanking---welding oil inlet and outlet---annealing to relieve stress---reprocessing process is too long, it is difficult to meet the actual demand

At the same time, it is not good for improving the productivity of the cylinder

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