Driver's cabin of engineering machinery

Abstract

The invention relates to a cab of engineering machinery, which comprises a main body, a front window and a door. Wherein, said door comprises a door body connected to one switch device; said switch device comprises a rotating axle and a connecting rod transmission device; the connecting rod transmission device is formed by parallel first upper and lower connecting rods and parallel second upper and lower connecting rods; the rotating axle is fixed inside the cab; one end of first upper and lower connecting rods is connected to the rotating axle, while another end is connected to the top and bottom of vehicle door; one of second upper and lower connecting rods is connected to the main body of cab, while another end is connected to the top and bottom of vehicle door. The invention has simple structure and beautiful appearance, while it uses closed window to obtain better operation stability and easy pushing-drawing, with long service life.

Description

technical field [0001] The invention mainly relates to the field of cabs of construction machinery or walking machinery, in particular to a cab of construction machinery. Background technique [0002] In the construction machinery or walking machinery of the prior art, such as hydraulic excavators and other operating equipment with cabs are affected by factors such as stone splashes, dust, noise, wind and rain, high and low temperature, and strong ultraviolet rays in the working environment during the working process. As well as the need for personal safety protection of the driver, the driver needs to work in the cab, and because the driver needs to see the working status of the machine actuator, this type of cab should have a front window. In addition, because the driver requires opening the front window in a specific working environment to obtain a brighter visual effect than closing the front window, and even needs to extend the head, shout, and enjoy the natural wind, s...

AI Technical Summary

Problems solved by technology

The front window is closed most of the time during normal work, so the spring is at the maximum stretch state most of the time during normal work, and the mechanical tension spring is at the maximum position of its designed working stroke for a long time, which will inevitably lead to changes in spring stiffness. Small, showing that the elastic force is gradually decreasing, and the designed elastic force cannot be reached, that is, the designed upward boosting effect cannot be achieved.

2. The spring wire rope booster mechanism cannot achieve an ideal booster effect

In this way, a limit value is added to the spring force, and the relationship between the spring force and the stroke becomes smaller and smaller with the stroke, so the mechanism cannot achieve an ideal boosting effect

3. The reliability of the spring wire rope power-assisted mechanism is low when it moves quickly

But the design of this kind of car door makes the opening and closing of the car door more dependent on the cooperation of slide rails and rollers, and general construction machinery, such as hydraulic excavators, all work in very harsh environments, dust, sand and various There are many mixed pollutants, and these pollutants can cause the unsmooth cooperation between the slide rail and the rollers, thereby greatly reducing the adaptability of the slide rail door. At the same time, the setting of the slide rail makes the originally very limited cab space more It is difficult to arrange, and has the disadvantages of short working life, unreliability, and difficult maintenance

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