High-speed cylinder with buffer device

Abstract

The invention relates to a high-speed cylinder with a buffer device. The high-speed cylinder with the buffer device comprises a cylinder body, a piston component, a piston rod, a rear end cover and a front end cover. The rear end cover and the front end cover are arranged at the rear end and the front end of the cylinder body respectively, the rear end cover is provided with an air inlet, and the front end cover is provided with a hole. The piston component is arranged in the cylinder body, one end of the piston rod is connected with the piston component, and the other end of the piston rod penetrates out of the hole in the front end cover. A buffer piston is further arranged in the cylinder body and located between the piston component and the front end cover, and the buffer piston is provided with a hole for the piston rod to penetrate through. Exhaust outlets are formed in the cylinder body and located between the buffer piston and the front end cover. A vent hole enabling the front side and the rear side of the buffer piston to be communicated is formed in the buffer piston. The cylinder is provided with the buffer device, and the piston component of the cylinder can be effectively prevented from directly impacting the cylinder end covers.

Description

technical field [0001] The invention relates to a cylinder, especially a high-speed cylinder with a speed greater than 3m / s. Background technique [0002] Ordinary cylinders are generally composed of front and rear end covers, cylinder walls, pistons and piston rod assemblies. The thrust generated by the pressure difference on both sides of the cylinder piston drives the piston rod to move, and then drives the object in contact with the piston rod to move. The thrust of the cylinder is equal to the product of the pressure difference on both sides of the piston and the cross-sectional area of ​​the piston. The moving speed of the cylinder is the sum of the thrust of the cylinder. The stroke of the cylinder is directly proportional. Due to the large impact force of the piston, the maximum speed of the general cylinder can only be 3m / s. [0003] At present, in the production process, it is necessary to provide a high-speed cylinder with a speed greater than 3m / s. For example, ...

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Problems solved by technology

[0003] At present, in the production process, it is necessary to provide a high-speed cylinder with a speed greater than 3m / s. For example, according to the requirements of civil aviation passenger seats for the HIC value test of the dummy in the test, a high-speed cylinder is required to make a dummy head module weighing about 6kg. Accelerate to a speed of no less than 10.4m / s within a certain stroke. At the same time, due to the limitation of the equipment itself, the cylinder stroke is short (less than 1m). If the cylinder speed is increased only by increasing the pressure difference on both sides of the piston, During the test, the high-speed moving piston assembly (greater than 10m / s) will directly collide with the cylinder end cover, and the piston assembly and the cylinder end cover will be deformed or even damaged, so ordinary cylinders cannot meet the requirements of this equipment

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