Dust suction nozzle lifting self-locking device

Abstract

The invention relates to a dust suction nozzle lifting self-locking device, which mainly solves the problems that dust suction nozzle assemblies of the existing various sweeping vehicles cannot be completely locked after being lifted by a hydraulic oil cylinder and a steel rope, and the normal running of the sweeping vehicles is influenced caused by the slow falling of a dust suction nozzle because of vibration, inner leakage of a hydraulic system and the like in the running process of the sweeping vehicles. The dust suction nozzle lifting self-locking device is formed by combining a lifting oil cylinder, an oil cylinder support seat, a three-hole crank arm, a crank arm support seat, a steel rope, a length regulating rod and a pin shaft, wherein one end of the length regulating rod is connected with the steel rope, the other end of the length regulating rod is hinged with a connecting support seat of a dust suction nozzle assembly by a pin shaft, the three-hole crank arm is arranged between the lifting oil cylinder and the steel rope and is hinged with the lifting oil cylinder and the steel rope through the pin shaft, the three-hole crank arm is hinged with a crank arm support seat hole through the pin shaft to form a fixed rotary center, and a circular arc groove facing the lifting rotation direction of the three-hole crank arm is formed at the upper end of the crank arm support seat. When the lifting oil cylinder pulls the three-hole crank arm to upwards rotate, the steel rope is connected with the pin shaft to enter the circular arc groove and goes around the rotary center of the crank arm support seat, the dust suction nozzle realizes the self locking through the self-weight forming force moment, and the influence on the normal running of the sweeping vehicles caused by descending and dropping of the dust suction nozzle cannot be generated. When the dust suction nozzle needs to descend for sweeping work, only an oil cylinder is required for pushing the three-hole crank arm to downwards rotate.

Description

Technical field [0001] The invention relates to a self-locking device for lifting dust suction nozzles used in various road sweepers. The road sweeper is a special vehicle used for sanitation sweeping and cleaning operations. Background technique [0002] The dust suction nozzle is a working device for garbage absorption and lifting during the cleaning operation of various road sweepers. During the cleaning operation of the road sweeper, the dust suction nozzle is lowered to the sweeping road surface for garbage absorption. After the cleaning operation is completed, the dust suction nozzle must be raised by a height to drive the road sweeper normally. The common feature of all kinds of existing road sweepers is that the dust nozzle cannot be completely locked after it is lifted only by the hydraulic cylinder and the steel rope. During the driving process of the road sweeper, the dust nozzle slows down due to vibration, internal leakage of the hydraulic system and other reaso...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings and deficiencies of the background technology, the present invention provides a self-locking device for lifting the dust suction nozzle, which solves the problem that the dust suction nozzle of the existing road sweeper cannot be completely and reliably locked after being lifted, and the falling affects the normal driving of the road sweeper. question

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