Cam locking mechanism with self-locking function

Abstract

The invention relates to a cam locking mechanism with a self-locking function, which comprises a long bottom plate, wherein a support is arranged on the upper surface of the left side of the long bottom plate, and a supporting lug is arranged on the upper surface of the right side of the long bottom plate; the support is provided with a vertical through cavity, a vertical shaft capable of moving up and down is arranged in the through cavity, the upper end of the vertical shaft extends out of the through cavity, and a top plate is arranged at the upper end of the vertical shaft; a rotatable camis arranged on the outer side face of the support, and when the cam rotates, the edge of the cam abuts against the lower surface of the top plate so as to drive the vertical shaft to move up and down; and the supporting lug is hinged to the bottom of the hydraulic cylinder, a piston rod of the hydraulic cylinder is eccentrically hinged to the cam, and the telescopic action of the piston rod drives the cam to rotate. The cam locking mechanism has the beneficial effects of being simple and compact in structure, small in space occupation ratio, high in positioning precision, high in response speed, stable and reliable.

Description

technical field [0001] The invention relates to the technical field of vehicle-mounted radar antennas, in particular to a cam locking mechanism with self-locking function. Background technique [0002] In order to meet the requirements of rapid installation and withdrawal and improve tactical mobility, the large-caliber vehicle-mounted radar antenna usually treats the antenna front as a foldable form. Among them, the automatic locking mechanism that realizes the deployment of the antenna side blocks is a key device, and its locking performance has an important impact on the repeated positioning accuracy of each side block and the antenna profile maintenance accuracy under harsh working conditions. [0003] Common side block locking mechanisms that realize the deployment of the vehicle-mounted radar antenna include electric / hydraulic direct drive cylindrical pin locking mechanisms, electric / hydraulic direct drive conical pull pin locking mechanisms, electric / hydraulic four-ba...

AI Technical Summary

Problems solved by technology

[0004] Electric / hydraulic direct drive cylindrical pin locking mechanism (small servo motor drives gear to drive sliding screw and pushes cylindrical pin or small ordinary hydraulic cylinder pushes cylindrical pin through piston rod) in the process of maintaining the locked state, the matching clearance between cylindrical pin and pin hole It will lead to uncertain relative positions of the blocks on both sides, and cannot effectively locate the relative positions of the blocks on both sides accurately, causing the accuracy of the antenna array to be aggravated by the adverse effects of changing wind loads

[0005] For the electric / hydraulic direct drive conical pull pin locking mechanism (a small servo motor drives a gear to drive a sliding screw and pulls a conical pull pin or a small ordinary hydraulic cylinder pulls a conical pull pin through a piston rod), the former slides when the locked state is released. The maximum static friction of the system that the screw needs to overcome is relatively large, and it is prone to unsteady release of the locking state (that is, the screw crawls) and the phenomenon of excessive instantaneous current of the motor, and there are still problems of high power ratio per unit weight and power ratio per unit size

The method of using a small ordinary hydraulic cylinder to pull the conical pull pin through the piston rod avoids the problem that the power ratio per unit weight and the power ratio per unit size are too large; This will lead to a serious problem of energy consumption. Even if the spring return force of the single-acting hydraulic cylinder is used to maintain the locked state, when the antenna side block is affected by the fluctuating wind load, the spring return force may still be sufficient. fluctuations, which in turn affect the surface accuracy of the antenna

[0006] The electric / hydraulic four-bar locking mechanism (that is, the crank slider mechanism, the rotation of the crank is driven by the motor or hydraulic cylinder, and the slider drives the conical pull pin) can be efficiently and stably carried out through the dead point of the four-bar mechanism. The locking state is maintained, and the mechanism can significantly reduce the energy consumption of the actuator when the locking action is executed and the locking state is released; however, the antenna space occupied by the mechanism is too large and the structure is complex, which still does not meet the requirements of the light weight of the vehicle radar antenna array. Defects with compact design principles

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