Oil gas type load reduction pneumatic actuator cylinder and load reduction method thereof

Abstract

The invention discloses an oil gas type load reduction pneumatic actuator cylinder and a load reduction method thereof. The actuator cylinder comprises an outer cylinder, an end cover fixed at one end of the outer cylinder, and a fixed piston arranged in the outer cylinder and mounted on a piston rod, wherein the piston rod partially extends outside the end cover; the other end of the outer cylinder is a closed end provided with a pressure gas joint; a floating piston capable of moving in the length direction of the outer cylinder is arranged between the closed end of the outer cylinder and the fixed piston; a pressure gas cavity is formed between the floating piston and the closed end of the outer cylinder; a rodless cavity is formed between the floating piston and the fixed piston; a rod cavity is formed between the fixed piston and the end cover; and the rodless cavity and the rod cavity are communicated to form a differential structure. The actuator cylinder realizes the supply of needed high load in normal working travel, and reduces the load at the travel terminal to reduce the terminal load impact.

Description

technical field [0001] The invention relates to an oil-gas type load-reducible pneumatic cylinder and a load-reduction method thereof. Background technique [0002] In recent years, due to the characteristics of fast speed, wide application environment and no casualties, UAVs have become more and more widely used. As an important functional structural part of the UAV landing gear, there are currently two main forms of power sources: electric retractable cylinder and pneumatic cylinder. Electric actuators have high requirements on motors, heavy weight, and slow retraction time. For drones that land at high speeds, have requirements for landing gear lowering time and aircraft weight, electric actuators cannot meet their requirements. Pneumatic actuators use high-pressure air as the power source, but the high-pressure gas has a large impact on the movement of the actuator, and the load at the end of the actuator will directly affect the performance of the landing gear and the ...

AI Technical Summary

Problems solved by technology

This damping form is easy to cause blockage because the hole is relatively small. On the other hand, when the piston rod moves to the buffer area, the speed change is relatively large, which causes a large buffer pressure in the damping chamber, and the parts are heavily loaded. In order to meet the strength requirements, it must be Strengthen the structural size of the parts in the buffer area, increasing the product weight

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