Hydraulic steering wheel steering brake control device of crawler walking machine

Abstract

The invention relates to a hydraulic steering wheel steering brake control device of a crawler walking machine. The device comprises an oil tank, a steering oil pump, a priority valve, a cycloid rotary valve type hydraulic steering gear, a steering brake valve, a steering wheel, a brake pedal and a brake cylinder group. According to the device disclosed by the invention, the cycloid rotary valve type hydraulic steering gear is operated by the hydraulic steering wheel to coordinate the steering brake valve and the brake cylinder group, only the steering wheel needs to be steered in steering, and only the brake pedal needs to be pedaled in service breaking or decelerating, so that the operation of a driver is very convenient. In addition, when the steering oil pump is failed, the manual steering of the steering wheel and the service braking can be realized, double insurances are realized, and the safety is greatly improved.

Description

technical field [0001] The invention relates to a crawler traveling machine which uses a planetary steering mechanism to realize steering, in particular to a full hydraulic steering wheel steering brake control device for a crawler traveling machine. Background technique [0002] Existing crawler tractors, bulldozers and other crawler traveling machines that steer with planetary steering mechanisms are all provided with left and right planetary steering mechanism brake operating levers and left and right half-axis brake pedals in front of the driver. The left or right planetary steering mechanism brake operating lever is moved by hand, and the left or right half-axis brake pedal is stepped on again. When braking or deceleration is required during driving, the driver must step on the left and right half-axis brake pedals at the same time. And the wheeled traveling machines such as the wheeled tractor of existing full hydraulic steering operation, only need to turn steering wh...

AI Technical Summary

Problems solved by technology

Compared with the two steering operation methods, the existing crawler machinery steering operation method has the following disadvantages: ① Due to the difference in operating habits, the driver needs special training; ② When steering, the driver must use both hands and feet, which will inevitably distract the driver's energy , It is easy to cause fatigue, and work efficiency and safety will also be reduced; ③The driver is required to have high driving skills. The planetary steering mechanism brake operating lever, the left or right half-axis brake pedal can only be stepped on when the planetary steering mechanism brake is completely disengaged, or the driver is required to loosen the left or right half-axis brake pedal when driving in a straight line, and wait until the brake pedal is fully released. After the brake is released, the brake operating lever of the left or right planetary steering mechanism can be released to engage the power. However, it is actually difficult to achieve precise and in-place coordination of hands and feet. Therefore, braking without cutting off the power will lead to increased wear of the brake; ④ In order to reduce The steering force of the driver, the brake operating levers of the left and right planetary steering mechanisms are often designed to be longer. According to the principle of saving labor and not saving work, to achieve a smaller turning radius, the driver needs to move the operating lever to rotate a larger stroke. Therefore, the corresponding design of the driver's cab is relatively large and heavy;

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