Adjustable air damping buffer

Abstract

The invention discloses a buffer mechanism based on a pilot overflow valve. The buffer mechanism comprises a piston rod, an air piston cylinder, a return spring, the pilot overflow valve and a fast reset one-way valve, wherein the main structures are the piston rod, the piston cylinder and the return spring, the auxiliary structures are the overflow valve and the one-way valve. When the impact acts on the piston rod, an air cavity is compressed, at the moment, the one-way valve is closed, air flows to the pilot overflow valve through a pipeline, the pressure of a valve element and the pressureof a damping hole can be adjusted through two adjusting knobs, then the gas flowing speed of the overflow valve can be adjusted, then the buffer pressure and time of the buffer can be adjusted, the gas is returned to the atmosphere through a silencer, when the impact is stopped, the return spring works, the pressure of the air cavity is enabled to be reduced to be less than the atmospheric pressure, at the moment, the one-way valve works, the air rapidly fills the air cavity through a filter, and then the buffer is enabled to be reset; and two air valves are embedded in a machine frame, so that assembly, disassembly and maintenance are convenient.

Description

Technical field [0001] The invention relates to the field of mechanical buffers, in particular to an adjustable air damping buffer. Background technique [0002] In modern industrial manufacturing and production, there are more and more automated mechanisms. All moving parts need to cooperate with each other to complete the work together. In order to ensure the smooth movement of the mechanism, buffers are needed in some places to protect mechanical parts or complete corresponding actions. As a safety protection device to slow down rigid collisions during equipment operation, buffers are widely used in lifting and transportation, metallurgical machinery, vehicles and ships, aerospace, weaponry and other mechanical equipment. [0003] The existing buffers mainly include: (1) rubber buffers, (2) spring buffers, (3) cylinder buffers, (4) impact buffers, and (5) hydraulic buffers. Among them, the present invention belongs to the category of cylinder buffers. The cylinder buffer has a...

AI Technical Summary

Problems solved by technology

However, in actual industrial production, the state of impact is not certain. In one occasion, the impact is a value, and in another occasion, it is another value. At this time, it is necessary to replace the buffer or use a hydraulic adjustable buffer. , but has its limitations. The existing adjustable buffers are generally hydraulic damping adjustable buffers, which can adjust the damping of oil circulation, but cannot adjust the ratio between the pressure difference and the flow rate, so they cannot adjust the impact separately. Momentum and time can only adjust the combination of impact momentum and buffer time linearly in one dimension

In addition, the viscosity of the oil used in the hydraulic buffer is much higher than that of air, so it takes a long time to reset after the buffer is over, and it cannot meet the production requirements in some high-frequency occasions. Therefore, it is necessary to design an adjustable air damping buffer

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