Rear door locking device of multifunctional washing and sweeping truck

Abstract

The invention discloses a rear door locking device of a multifunctional washing and sweeping truck. The rear door locking device comprises a box body, a rear door, an oil cylinder, a push-pull rod hinge base, a push-pull rod, a locking base, a locking hook rotating shaft and a locking hook; the push-pull rod hinge base is fixed in the middle of the rear door; a kidney-shaped guide groove is formed in the push-pull rod hinge base; a hinge shaft is connected to the inner side of the kidney-shaped guide groove in a sliding mode, is hinged to a piston rod of the oil cylinder and is hinged to the upper end of the push-pull rod; the locking hook comprises a thrust arm and a hook body; a shaft hole matched with the locking hook rotating shaft is formed in the intersection of one end of the hook body and one end of the thrust arm; the lower end of the push-pull rod is hinged to the other end of the thrust arm; the locking base is arranged at the rear lower part of the box body; and when the piston rod of the oil cylinder extends out to reach the extreme value, the other end of the hook body of the locking hook is hooked on the locking base, and an included angle between the center line of the push-pull rod and the center line of the thrust arm of the locking hook is a right angle. The rear door locking device has the advantages that the rear door can be guaranteed to be locked under the impact of sewage in the box body, and therefore opening of the rear door can be avoided.

Description

technical field [0001] The invention relates to a rear door locking device of a multifunctional washing and sweeping vehicle. Background technique [0002] Existing a kind of multi-functional washing and sweeping vehicle comprises box body, back door, back door hinge seat, oil cylinder, oil cylinder seat, push-pull rod hinge seat, push-pull rod, locking seat, locking hook rotating shaft and locking hook. The rear door hinge seat and the oil cylinder seat are fixed on the rear end of the casing, and the upper top of the back door is hinged with the rear door hinge seat. The oil cylinder and the oil cylinder seat form a hinge, and the push-pull rod hinge seat is fixed in the middle of the rear door. There is a waist-shaped guide groove on the push-pull rod hinge seat, and a hinge shaft is slidingly connected in the waist-shaped guide groove. The hinge shaft is hinged with the piston rod of the oil cylinder, and the hinge The shaft is hinged with the upper end of the push-pull...

AI Technical Summary

Problems solved by technology

Since the component force parallel to the thrust arm has no effect on the locking of the rear door, the problem of insufficient locking torque is caused, and the locking hook is easily detached from the locking seat, causing the rear door to open

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