Constant torque a-type front locking device

Abstract

The invention provides a fixed-moment A-shaped front locking device. The fixed-moment A-shaped front locking device comprises a screw rod, wherein one end of the screw rod is hinged to a case mounting frame; the other end of the screw rod is a free end; a lock catch and a locking component which are matched with a case latch hook sleeve the screw rod; the locking component is composed of a thread sleeve, a locking wheel, rolling balls and a spring component; the thread sleeve is in screw-thread fit- with the screw rod; a flange is formed at the front end of the thread sleeve; grooves, which are matched with the rolling balls, are formed in the inner side end surface of the flange; the locking wheel sleeves the thread sleeve; through holes allowing the rolling balls to be placed in are formed in the front end of the locking wheel; and the spring component is arranged in the locking wheel and applies force on the rolling balls. With the adoption of the fixed-moment A-shaped front locking device, the problem of a matching moment between the traditional latch hook and a front locking can be effectively solved, and the unified moment of structure interconnection is ensured; and with the addition of an elastic fixed-moment regulating mechanism, the functions of preventing looseness and locking with the fixed moment are realized, the functions of external-field rapid change and locking with the fixed moment of LRUs are met, and reliable connection of products are realized.

Description

technical field [0001] The invention belongs to the field of aviation, and in particular relates to a constant-torque A-type front locking device in a mounting frame of an airborne electronic device. Background technique [0002] The A-type tightening device stipulated in the current GJB441 standard consists of a front tightening and a rear tightening. The rear tightening is realized by the cooperation of the taper pin on the mounting bracket and the pin sleeve on the chassis, and the front tightening is composed of hinges, pins, front locking components and lock hooks on the chassis on the mounting bracket. Since the hinge is rigidly connected to the mounting frame, the cooperation is realized through the curved surface fit between the front lock and the lock hook. [0003] The commonly used front locking adopts rigid connection, and the size of the tightening force is closely related to the operator's experience and hand strength. There are hidden dangers of insufficient ...

AI Technical Summary

Problems solved by technology

[0003] The commonly used front locking adopts rigid connection, the size of the tightening force is closely related to the operator's experience and hand strength, there are hidden dangers of insufficient tightening or excessive tightening torque

Therefore, it is difficult to ensure the reliability of the connection in terms of operation and installation. If the tightening torque is too large or too small, it may lead to failure of the connection between the chassis and the mounting bracket.

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