A lock mechanism for the side door of engineering machinery

Abstract

The invention discloses a door lock mechanism of a side door of an engineering machine. The door lock mechanism comprises a door lock body, a crank handle, an upper latch body, a lower latch body, an upper stopper and a lower stopper; the door lock body comprises a lock box, a lock cylinder, a lock cover, a gear shaft, racks and a reset torsional spring; the door lock body is fixedly arranged at the inner side of the door; the lock cylinder, the gear shaft, the rack and the reset torsional spring are arranged in a space formed by buckling the lock box and the lock cover together; the gear shaft is provided with the reset torsional spring; the lock cylinder is provided with a bolt; the gear shaft is provided with a check block; the gear shaft is limited by matching the bolt with the check block; the number of the racks is two, and the two racks are arranged in parallel; the racks are respectively meshed with the gear shaft; two latch body connection blocks are respectively and fixedly arranged below the racks; the crank handle is connected with the gear shaft; the upper latch body and the lower latch body are respectively connected with one of the two latch body connection blocks; the upper stopper and the lower stopper are respectively arranged on an upper doorframe and a lower doorframe. The door lock mechanism has the beneficial effects that both the upper part and the lower part of the side door of the engineering machine can be fixed, so the side door is firm in fixation and is not easy to sway; the side door is convenient to open and close.

Description

Technical field [0001] The invention relates to a door lock mechanism for a side door of an engineering machinery, belonging to the technical field of door locks. Background technique [0002] During the operation of large construction machinery, the machine needs to be overhauled and maintained frequently. In order to facilitate the operation of the staff, it is necessary to design some openable access doors and maintenance doors. When the machine is in normal operation, the doors need to be normally closed and fixed firmly. However, the access doors and inspection doors on large construction machinery are relatively large in size, and ordinary door locks that can only fix the door in one place are difficult to achieve the function of fixing the door firmly without shaking. Moreover, the general door lock itself is not strong, and the strength is not enough to meet the selection requirements of side door locks of large construction machinery. Summary of the invention [0003] In...

AI Technical Summary

Problems solved by technology

However, the size of access doors and maintenance doors on large-scale construction machinery is relatively large, and ordinary door locks that can only fix one part of the door are difficult to achieve the function of fixing the door firmly without shaking

Moreover, the strength of the general door lock itself is not high, and the strength is not enough to meet the selection requirements of the side door locks of large-scale construction machinery.

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