Wheel excavator and walking steering method thereof

Abstract

The invention relates to a wheel excavator and a walking steering method thereof and belongs to the technical field of excavation heavy industrial machinery. The device comprises a walking chassis, wherein the walking chassis comprises a main frame, wherein a front axle frame and a rear axle frame are arranged at two ends of the main frame; the front bridge frame is provided with a front axle andthe rear axle frame is provided with a rear axle; the front axle frame is connected with the main frame through a front vertical shaft; the rear axle is connected with the main frame through a rear vertical shaft; the main frame is provided with a steering oil cylinder, a front connecting rod, a hinging rod and a rear connecting rod; one end of a cylinder barrel of the steering oil cylinder is connected with the main frame; one end of a piston rod of the steering oil cylinder is hinged to the front axle frame; one end of the front connecting rod is hinged to the front axle frame and the otherend of the front connecting rod is hinged to one end of the hinging rod; the other end of the hinging rod is hinged to one end of the rear connecting rod and the other end of the rear connecting rod is hinged to the rear axle frame; and the middle of the hinging rod is hinged to the main frame. According to the wheel excavator and the walking steering method thereof, the steering of the wheel excavator can be realized through one oil cylinder; and the front and rear axle frames are steered simultaneously, so that the turning radius is small and the operation is flexible.

Description

technical field [0001] The invention relates to a wheeled excavator and a walking and steering method thereof, belonging to the technical field of excavating heavy machinery. Background technique [0002] A common wheeled excavator is composed of a walking chassis, a working device, an upper turntable, a power unit, a hydraulic system, an operating device, a slewing mechanism, a transmission mechanism, etc. Most of the wheeled excavators on the market now use the front axle as the steering drive axle to realize the turning and swing of the whole vehicle. The steering drive axle has a complex structure, high failure rate, high cost, large turning radius and inflexibility. There is also a wheeled excavator driven by four hydraulic motors on the market. One hydraulic motor is installed at each end of the front axle and the rear axle. , 4 motors rotate forward when moving forward, and 4 motors rotate backward when turning backward. When turning left, the two motors on the left ...

AI Technical Summary

Problems solved by technology

Most of the wheeled excavators on the market now use the front axle as the steering drive axle to realize the turning and swing of the whole vehicle. The steering drive axle has a complex structure, high failure rate, high cost, large turning radius, and inflexibility

There is also a wheeled excavator driven by four hydraulic motors on the market. One hydraulic motor is installed at each end of the front axle and the rear axle. , 4 motors rotate forward when moving forward, and 4 motors rotate backward when turning backward. When turning left, the two motors on the left rotate backward, and when turning right, the two motors rotate forward. Rotate backwards, and the two motors on the left side rotate forward. This structure is expensive to manufacture, and the four hydraulic motors are distributed with different oils, so the walking will be out of sync, and straight-line walking cannot be guaranteed.

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