Delivery cylinder piston lubrication system and pump truck

Abstract

The invention proposes a delivery cylinder piston lubrication system and a pump truck. The delivery cylinder piston lubrication system includes a main oil cylinder, a delivery cylinder, a piston rod, a gland with an oil inlet chamber, a lubricating oil pump connected to the oil inlet chamber, and a lubricating oil pump. The connected lubricating oil tank, the gland is set on the end of the main oil cylinder close to the delivery cylinder or the end of the delivery cylinder close to the main oil cylinder, the piston rod and the delivery cylinder piston connected to the rear end of the piston rod form an oil inlet passage, and the piston rod passes through the main oil tank. When the oil cylinder, delivery cylinder, gland, and piston rod slide, the oil inlet hole of the oil inlet passage slides into the oil inlet chamber, the lubricating oil in the lubricating oil tank is pumped into the oil inlet chamber through the lubricating oil pump, and the oil inlet passage into the delivery cylinder. Since the lubricating oil hole is opened on the gland, there is no lubricating oil hole on the peripheral wall of the delivery cylinder, so there is no phenomenon of scratching the piston of the delivery cylinder, thereby avoiding mechanical failures caused by scratches.

Description

technical field [0001] The invention relates to the technical field of pump trucks, in particular to a pump truck and a delivery cylinder piston lubrication system of the pump truck. Background technique [0002] Concrete pump trucks have the function of simultaneously completing the delivery of on-site concrete conveyors, and are indispensable mechanical equipment for on-site concrete pouring on civil construction sites. Generally, the working environment of concrete pump trucks is relatively harsh and the work intensity is relatively high, which is easy to cause wear and tear of concrete pump trucks. In order to enable the concrete pump truck to work continuously and normally under all-weather and full-load operating conditions, it is necessary to ensure the wear resistance and reliability of the parts. Therefore, the lubrication and maintenance of the mechanical equipment of the concrete pump truck is particularly important. As we all know, the conveying of concrete is r...

AI Technical Summary

Problems solved by technology

[0003] However, this fixed-point lubrication method requires the lubricating oil pump to have a high degree of control accuracy for the lubricating oil pumping time, that is, the lubricating oil pump can pump oil into the delivery cylinder only at the moment when the piston of the delivery cylinder reaches the position of the lubricating oil hole, and requires The response speed is very fast. If the response speed is slow and the control accuracy is poor, dry friction will occur between the delivery cylinder piston and the delivery cylinder body.

In addition, the lubrication time of this fixed-point lubrication method is short and the effect is not good, which greatly reduces the service life of the delivery cylinder and the piston head of the delivery cylinder

Moreover, due to machining accuracy problems, the lubricating oil hole is prone to have sharp edges. During each sliding process between the piston head of the delivery cylinder and the delivery cylinder, the seal on the piston head of the delivery cylinder is easily scraped by the sharp edge of the lubricating oil hole. Injury, mechanical failure or slurry leakage

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