Automatic gear shifting mechanism of wheel type mechanical walking excavator and wheel type mechanical walking excavator

Abstract

The invention discloses an automatic gear shifting mechanism of a wheel type mechanical walking excavator and the wheel type mechanical walking excavator. The mechanism comprises an operating panel, electromagnetic valves and air cylinders. The electromagnetic valves comprise an electromagnetic valve A, an electromagnetic valve B and an electromagnetic valve C. The air cylinders comprise a gear shifting air cylinder A, a gear shifting air cylinder B and a clutch air cylinder; the electromagnetic valve A, the electromagnetic valve B and the electromagnetic valve C are electrically connected to a control end of the operating panel, separately, and are in gas circuit connection to a gas storage tank of the excavator, and the electromagnetic valve A and the gear shafting air cylinder A, the electromagnetic valve B and the gear shafting air cylinder B and the electromagnetic valve C and the clutch air cylinder are in one-to-one-correspondence gas circuit connection, separately; a piston shaft of the gear shifting air cylinder A is connected to a gear shifting pull rod A of a transmission, and a piston shaft of the gear shifting air cylinder B is connected to a gear shifting pull rod B of the transmission. The mechanism disclosed by the invention realizes an automatic gear shafting operation of mechanical transmission, has the characteristics of being concise in structure, stable and reliable and simple to operate, and avoids the problems that the transmission mechanism is damaged as a result of malfunction due to operating inexperience, or even safety accidents are generated, are solved.

Description

technical field [0001] The invention relates to the field of wheeled mechanical walking excavators, in particular to an automatic shift mechanism of the wheeled mechanical walking excavator and the wheeled mechanical walking excavator. Background technique [0002] An excavator is an earth-moving machine that uses a bucket to dig materials higher or lower than the bearing surface, and loads them into transport vehicles or unloads them into the stockyard. Excavators have become one of the most important construction machinery in engineering construction. . According to different transmission methods, excavators can be divided into hydraulic walking excavators and mechanical walking excavators. Compared with mechanical transmission, hydraulic transmission is a new technology. Compared with wheeled mechanical walking excavators, hydraulic excavators have more components It has the advantages of flexible layout and installation, large-scale stepless speed regulation, and easy a...

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Problems solved by technology

However, because the hydraulic excavator uses liquid as the medium, there are corresponding defects: severe heat generation, not suitable for long-distance walking; mechanical loss, pressure loss, and leakage loss in the transmission; sensitive to oil temperature, it is not suitable to use components at low or high temperatures, High manufacturing precision and high cost; it is difficult to diagnose when the device fails; etc.

Because the reliability of the flexible shaft or the pull rod mechanism is low, frequent maintenance is required; in addition, the manual shift method is more complicated and requires the skilled cooperation of the feet, which is inconvenient to operate. security incident

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