Locking oil cylinder, oil cylinder control system and climbing fire-fighting truck or fire-fighting operation vehicle

Abstract

The invention discloses a locking oil cylinder, an oil cylinder control system and a climbing fire-fighting truck or a fire-fighting operation vehicle. A piston (1) is installed at the inner end of a piston rod (2) of the locking oil cylinder, and the outer end of the piston rod (2) of the locking oil cylinder penetrates through a guide sleeve (3) to extend out of a cylinder barrel. The locking oil cylinder (100) further comprises an elastic plunger (6) installed on the cylinder barrel and a lock rod (5) located in the cylinder barrel. One end of the lock rod is hinged to the guide sleeve, and a lock hook is formed at the other end of the lock rod. A corresponding clamping groove (11) is formed in the piston, a plunger rod (61) of the elastic plunger extends into the cylinder barrel and is hinged to the lock hook end of the lock rod, and the plunger rod can drive the lock hook to be locked in the clamping groove or recede out of the clamping groove. A mechanical type locking mechanism is adopted, oil cylinder locking or unlocking control can be achieved in the manner that a plunger control valve unit (30) and an on-off valve (40) are combined to control the extending and retracting of the plunger rod, operation and control are convenient, and the operation safety of the climbing fire-fighting truck or the fire-fighting operation vehicle can be improved.

Description

technical field [0001] The invention relates to an oil cylinder and its control system, in particular to a luffing oil cylinder with a locking function, and a climbing fire truck or a fire fighting operation vehicle with the luffing oil cylinder. Background technique [0002] Climbing fire trucks or fire fighting vehicles are often used for high-altitude operations, such as debugging wind turbines at an altitude of more than 70 meters or carrying out fire fighting in high-rise buildings. At this time, under the action of the luffing oil cylinder, the boom stretches out from the car body to a high place, and the staff or firefighters stand in the working bucket at the top of the boom to perform operations. [0003] Among them, the boom is mainly supported by the luffing cylinder to perform the pitching action and lock the boom and working bucket at a specific working position. However, at an altitude of more than 70 meters, the wind force has a greater impact on the jib, whi...

AI Technical Summary

Problems solved by technology

However, the sealing effect of the balance valve is not absolute. When a small amount of leakage occurs in the balance valve, the luffing cylinder will retract, thereby increasing the unsafety of the vehicle.

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