A special buffer device for hydraulic cylinder

Abstract

The invention relates to a buffer device special for a hydraulic cylinder. The buffer device comprises a cylinder body. A sealing ring is arranged in an inner cavity of the cylinder body, a rod bufferplunger is inserted in the cylinder body, the rod buffer plunger is connected with a piston, the two ends of the piston are provided with U-shaped sealing rings, the bottom of the piston is providedwith a rodless buffer plunger, the rodless buffer plunger is matched with a groove in a buffer plate at the bottom of the cylinder body, the bottom of the buffer plate is connected with a damping spring assembly, the groove is connected with a first oil guide port, the first oil guide port is provided with a one-way valve, the top of the cylinder body is provided with a cylinder cover, the joint between the cylinder cover and the rod buffer plunger is provided with a reinforcing rib, the reinforcing rib is provided with a dustproof ring, the cylinder cover is provided with a second oil guide port, the second oil guide port is connected with a needle type throttling valve through a pipeline, the needle type throttling valve is connected with a top valve through a pipeline, the stop valve isconnected with an oil filter through a pipeline, the other end of an exhaust valve is provided with an exhaust hole, and the exhaust hole is formed in the top of the cylinder cover. The structure issimple, the buffer effect is good, sealing performance is good, generated oil dirt is reduced, pressure is stable, the structure is firm, and the service life is prolonged.

Description

technical field [0001] The invention specifically relates to a special buffer device for a hydraulic cylinder. Background technique [0002] The hydraulic cylinder is a common equipment in industrial production. There may not be a buffer device in the common hydraulic cylinder, but due to the huge impact force during the compression process, the speed is too fast during the descent process and a buffer is needed to prolong the use. life, but most of the existing buffer devices are not special-purpose. The special buffer devices on the market have a certain buffer effect, but because the oil contains certain impurities, it will cause its grease to regenerate, increase the friction of the inner wall, and wear the seal at the same time. The ring will reduce the sealing performance, and it cannot be resolved under high pressure, which will affect its stability and shorten its life. Contents of the invention [0003] The object of the invention is a special buffer device for h...

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Problems solved by technology

[0002] The hydraulic cylinder is a common equipment in industrial production. There may not be a buffer device in the common hydraulic cylinder, but due to the huge impact force during the compression process, the speed is too fast during the descent process and a buffer is needed to prolong the use. life, but most of the existing buffer devices are not special-purpose. The special buffer devices on the market have a certain buffer effect, but because the oil contains certain impurities, it will cause its grease to regenerate, increase the friction of the inner wall, and wear the seal at the same time. ring, reducing the sealing performance, unable to resolve when the pressure is high, affecting its stability and short life

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