Sealed type double-acting single-piston-rod hydraulic cylinder

Abstract

The invention relates to the technical field of hydraulic cylinders, and discloses a sealed type double-acting single-piston-rod hydraulic cylinder, which comprises a cylinder body, limiting grooves are formed in the inner side face of the cylinder body at equal angles, a movable block is movably connected into the cylinder body in a sleeved mode, limiting blocks are fixedly installed on the outer side face of the movable block at equal angles, and the movable block is movably clamped with the limiting grooves through the limiting blocks. According to the sealed type double-acting single-piston-rod hydraulic cylinder provided by the invention, sliding blocks are movably clamped in the sliding grooves, when a piston rod is subjected to lateral impact force, a supporting block located above a fixed block is pressed immediately, and at the moment, a supporting spring located at the bottom end of the supporting block is pressed immediately and compressed correspondingly to drive an upper movable frame to move downwards, at the moment, the upper movable frame can be driven to rotate relative to a lower movable frame under the driving of a rotating shaft so as to drive the sliding blocks to move relative to the sliding grooves to counteract part of impact force, the impact force on the piston rod is relieved, and the advantage that the impact force is reduced when the piston rod is subjected to lateral impact is achieved.

Description

technical field [0001] The invention relates to the technical field of hydraulic cylinders, in particular to a sealed double-acting single-piston rod hydraulic cylinder. Background technique [0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swing motion). It has simple structure and reliable operation. When it is used to realize reciprocating motion, the deceleration device can be eliminated, and there is no transmission gap, and the motion 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 a cylinder barrel and a cylinder head, a piston and a piston rod, a sealing device, a buffer device and an exhaust device. Buffers and exhausts are application specific and other...

AI Technical Summary

Problems solved by technology

[0003]The single piston rod hydraulic cylinder currently used has a relatively simple structure, and its interior is mainly composed of a single piston rod and a cylinder body, and the piston can be driven by the hydraulic oil The rod performs telescopic operation relative to the cylinder body. When this structure is actually used, when the interior of the hydraulic cylinder is not filled with hydraulic oil, when the hydraulic cylinder is subjected to a lateral impact force, the interior is not equipped with a pair of lateral The device for cushioning the impact force can easily lead to collision between the hydraulic rod and the cylinder body, which can easily cause damage to the hydraulic rod or cylinder body

[0004]At the same time, since the hydraulic cylinder mainly uses hydraulic oil to push the relative movement of the piston rod, when the inside of the cylinder is filled with hydraulic oil, frequent filling and reduction of hydraulic oil The content can drive the piston rod to move continuously relative to the cylinder body, and when the hydraulic oil is frequently injected, it is easy to cause overheating inside the cylinder body, and the metal is prone to heat attenuation when the temperature is too high, resulting in the movement of the hydraulic cylinder. Itinerary is affected

[0005]In order to ensure the tightness of the device, the hydraulic cylinder will be equipped with an oil seal at the connection between the cylinder body and the piston rod to ensure the tightness of the cylinder body, but due to the use of the hydraulic cylinder The environment is relatively complicated, and when used in a relatively harsh environment, it is very easy to cause the surface of the piston rod to be contaminated with certain dust or debris. At this time, when the piston rod is retracted into the interior of the hydraulic rod, the debris and dust will enter the hydraulic cylinder. Inside, it is easy to cause a great impact on the sealing of the hydraulic cylinder

Images