Trailer type pneumatic ejection device

Abstract

The invention particularly relates to a trailer type pneumatic ejection device which comprises a chassis, a guide rail, an ejection pulley, an air cylinder, a pulley block, a traction cable and a hydraulic cylinder; wherein the bottom of the chassis is fixedly provided with a horizontal adjusting supporting leg and a tire, the chassis is also fixedly provided with a bracket, the front end of the bracket is fixedly provided with a hydraulic oil cylinder, the rear end of the bracket is fixedly provided with a towing hook, a guide rail groove on the guide rail is in rolling connection with the ejection pulley, the guide rail is internally and fixedly provided with the air cylinder, the air cylinder is connected to the ejection pulley through the traction cable and the pulley block, a movablepulley block is fixedly connected to the exposed end of a piston rod of the air cylinder, and a static pulley block is fixedly connected on the front end surface in the guide rail; and the scheme creatively designs a double-piston type automatic residual pressure discharging type air cylinder with positive pressure gas buffering, which integrates the functions of gas storage, energy storage and accelerated motion, and provides a novel buffering braking solution in an overshoot form, the system can provide higher off-track speed under a shorter stroke, and the trailer type pneumatic ejection device has excellent overload characteristic.

Description

technical field [0001] The invention belongs to the technical field of unmanned aerial vehicle ejection, and in particular relates to a trailer-type pneumatic ejection device. Background technique [0002] Catapult take-off is one of the main take-off methods for fixed-wing UAVs in recent years. It only needs a limited length of motion rails to accelerate the UAV to the off-track speed. According to different power sources, it can be divided into elastic ejection, pneumatic ejection, Rocket ejection and gas-liquid ejection, etc. Among them, due to the advantages of high off-orbit speed, low overload, stable performance, convenient operation and high cost performance, pneumatic ejection has received extensive attention and application in the field of UAVs at home and abroad. However, the existing pneumatic ejection devices often have the following problems: (1) the entire device is too bulky, and the main body of the device cannot be folded or adjusted for balance, and does ...

AI Technical Summary

Problems solved by technology

However, the existing pneumatic ejection devices often have the following problems: (1) the entire device is too bulky, and the main body of the device cannot be folded or adjusted for balance, and does not have the ability of mobile transportation and fast operation; (2) At the end of the process, the cylinder does not have the function of automatically discharging the residual pressure, and the pressure is discharged only through the solenoid valve or manual valve to control the on-off of the air circuit, which reduces the operating efficiency of continuous ejection; (3) Most of the cushioning methods only use oil pressure buffers Or ribbon blocking, but the oil pressure buffer can only absorb the impact energy when the moving speed is less than 4m / s, and the ribbon is only suitable for energy absorption in the case of small speed and small weight and has a short service life, neither of which is suitable for high speed Buffer deceleration in case of

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