Cylinder cylinder bottom welding structure of medium and high pressure hydraulic excavator cylinder

Abstract

The invention belongs to the field of hydraulic oil cylinders, and in particular relates to a cylinder bottom welding structure of a medium-high pressure hydraulic excavator oil cylinder, including a bottom plate, the upper end of the bottom plate is fixedly connected with a support column, and the upper end of the support column is fixedly connected to the top surface There is a top plate, the lower end of the top plate is slidingly connected with a connecting rod, the inner side of the connecting rod is fixedly connected with a cylinder, the upper surface of the bottom plate is rotatably connected with a runner, and the upper end of the runner is fixedly connected with a cylinder bottom , the upper end port of the cylinder bottom is against the lower end port of the cylinder barrel. By fixing the cylinder and the cylinder bottom, align the lower port of the cylinder with the upper port of the cylinder bottom, and make the connection point outside the welding head inside the connecting ring, and the welding head, the pressing part and the limit part are driven by the runner The welding rod is fixed, so that the welding head can be rotated to weld the welding rod in the welding groove, so as to realize the welding between the cylinder barrel and the bottom of the cylinder.

Description

technical field [0001] The invention belongs to the field of hydraulic oil cylinders, in particular to a cylinder bottom welding structure of a medium and high pressure hydraulic excavator oil cylinder. Background technique [0002] Hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). , the movement is stable, so it is widely used in various mechanical hydraulic systems. The output force of the hydraulic cylinder is proportional to the effective area of ​​the piston and the pressure difference on both sides. The hydraulic cylinder is basically composed of the cylinder barrel and the cylinder head, the piston and the piston rod, It consists of sealing device, buffer device and exhaust device. [0003] During the production process of the oil cylinder, the cylinder barrel and the cylinder bottom need to be welded together. In the prior art, when welding the cylinder barr...

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Problems solved by technology

[0003] During the production process of the oil cylinder, the cylinder barrel and the cylinder bottom need to be welded together. In the existing technology, when welding the cylinder barrel and the cylinder bottom, the size of the upper end port of the cylinder bottom is usually larger than the size of the lower end port of the cylinder barrel, so that It is enough to embed and connect the cylinder inside the cylinder bottom, so that only the upper port of the cylinder bottom and the outer wall surface of the cylinder need to be welded during welding, while the cylinder and the cylinder bottom welded by the existing technology are in the There are some problems in the process of use, that is, the external pressure of the oil cylinder is small, which is prone to risks such as breakage, and due to its butt joint structure during welding, the stress at the weld is relatively large, resulting in short service life of the oil cylinder product and easier As a result, the welded oil cylinder is not firm, and it is easy to cause safety hazards in the process of production and use

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