A piston-type loading cylinder with automatic protection function at stroke end

Abstract

The invention discloses a piston type loading cylinder with a stroke tail end automatic protection function, and relates to the technical field of hydraulic cylinders. When a piston rod moves to the tail end of a stroke, the internal pressure of a cylinder body can be quickly reduced, the piston rod can be quickly decelerated, and then the piston can be prevented from impacting the related structure of the cylinder body to damage a loading cylinder; and the piston type loading cylinder comprises the cylinder body, the piston rod and the piston located at one end of the piston rod, the first end of the cylinder body is sealed, the second end of the cylinder body is provided with an opening port, the piston rod is arranged at one end of the piston, and extends into the cylinder body from theopening port, and the piston is in sealed sliding connection with the inner wall of the cylinder body. The piston type loading cylinder is characterized in that the inner diameter of the position, close to the opening port, of the cylinder body is larger than the inner diameter of other positions so as to form an unloading structure at a position close to the opening port, and a gap is formed between the piston and the inner wall of the cylinder body when the piston moves to the unloading structure. The piston type loading cylinder is used for providing loading force.

Description

technical field [0001] The invention relates to the technical field of hydraulic cylinders, in particular to a piston-type loading cylinder with an automatic protection function at the stroke end. Background technique [0002] A hydraulic cylinder refers to a device that converts hydraulic energy into mechanical energy and is used to drive the working mechanism to perform linear or oscillating motion. It has a wide range of applications. There are also many types of hydraulic cylinders: piston hydraulic cylinders, plunger hydraulic cylinders, telescopic sleeve hydraulic cylinders, etc. Among them, the piston hydraulic cylinder is divided into two types: single-rod type and double-rod type. According to the action of hydraulic pressure, it is divided into single-acting type and double-acting type. [0003] Piston-type loading cylinders of the prior art, such as figure 1 As shown, it includes a cylinder 01, a piston rod 02 and a piston 03 located at one end of the piston rod...

AI Technical Summary

Problems solved by technology

In this case, since the internal pressure of the cylinder 01 is very high, and the bore of the loading cylinder is large and the stroke is large, the inertia of the piston rod 02 is also very large. Therefore, when the piston rod 02 of the piston loading cylinder moves At the end of the stroke, it is very easy for the piston 03 to hit the relevant structure of the cylinder body 1 (for example, it can be the guide sleeve 04) and damage the loading cylinder.

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