A box car door lock seat overturning device

Abstract

The invention discloses an overturning device for a door lock seat of a boxcar. Including tension spring, lock seat, connecting rod, pivot arm, pull rod, support seat, tension spring support, lock seat installation seat, pivot arm support and round pin. Described extension spring, lock seat, pivoting arm, support seat are installed on the box car door post or door frame, form a link mechanism with automatic reset function by connecting rod, pull rod and round pin connection. The invention adopts a four-link downturning mechanism, which saves effort in operation, and has a large downturning angle of the lock seat, allowing more space for the side door to ensure the safety of the vehicle; Due to the springback problem of the lock seat, the connecting rods of the device are connected by round pins, which is convenient for assembly and disassembly, and easy for maintenance and repair.

Description

technical field [0001] The invention belongs to the technical field of mechanical design, in particular to the technical field of vehicle door locking structure design and manufacture, and in particular relates to a boxcar door lock seat overturning device. Background technique [0002] The middle door of the existing P66K(H) and P70A movable side wall boxcars in China adopts a flip-down movable lock seat. The lock seat is installed in the groove of the middle door pillar. When the middle door is locked, the lock seat is turned up to the horizontal position, and the head of the lock seat protrudes from the groove of the middle door column as the lock seat of the middle door; when the side door needs to pass through the middle door column, the lock seat must be turned down and the It rotates into the groove of the central door post to make room for the side door to slide. The lock seat is composed of a pull rod, the round pin and the lock seat are connected to form a two-li...

AI Technical Summary

Problems solved by technology

When the pull rod is pulled to turn over the lock seat, it is necessary to overcome the torque of the tension spring on the lock seat. The more you pull down, the greater the tension of the tension spring, the greater the torque on the lock seat, and the lower the position of the lock seat, the pull rod is formed The distance between the line of action of the pull-down force and the rotation point of the lock seat, that is, the shorter the force arm, the greater the pulling force required to turn down the lock seat, and the line of action of the force formed by the pull rod is even in a straight line with the rotation center of the lock seat. The torque of the lock seat becomes zero, and it is difficult to rotate the lock seat at this time, and it is very laborious to turn down the lock seat

After the pull rod is pulled down, it snaps into a stopper to restrict its vertical displacement. Since the tie rod is rigid, it will cause the lock seat to rebound upward at a certain angle after being worn out with the stopper. In severe cases, it will occupy the sliding position with the side door. Passage, collision through the side door of the center post, affecting vehicle safety

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