Wheel track adjustable agricultural vehicle chassis

Abstract

The invention belongs to the technical field of vehicle chassis, and relates to a wheel track adjustable agricultural vehicle chassis. Two groups of agricultural vehicle wheel track adjusting devices share a longitudinal center plane of a vehicle and are arranged in a front-and-back mode on a frame according to a wheel base of wheels; and the two groups of wheel track adjusting devices are respectively fixedly connected with front and back ends of the frame through a horizontal rail of a support to form the wheel track adjustable agricultural vehicle chassis. Each group of agricultural vehicle wheel track adjusting device consists of a driving slider, driven sliders, connecting rods, supporting rods, wheel axles, wheels and a frame; distances between driving sliders and horizontal rails in the front and back agricultural vehicle wheel track adjusting devices are synchronously changed and kept equal by external driving power, and distances of wheels and the longitudinal center plane ofthe vehicle are symmetrically changed, so that the stepless adjustment of the wheel track of the agricultural vehicle chassis is realized and requirements on mechanical operation for crops in different row spacing are met. The wheel track adjustable agricultural vehicle chassis is suitable for field management mechanical operation in a growth period of crops.

Description

technical field [0001] The invention belongs to the technical field of vehicle chassis, in particular to an agricultural vehicle chassis with adjustable wheelbase. Background technique [0002] my country is a large agricultural country with a vast territory. Crops are grown in a wide range. There are many types of crops grown in the north and the south with great differences. The row spacing of different crops is generally different, and the row spacing of the same crop in different regions or different planting methods is generally different. During the growing period of crops, mechanized field management operations such as weeding, spraying, and fertilization require operation vehicles to walk along the row spacing of crops. Therefore, the wheel base of the agricultural vehicle chassis is required to be adjusted with the change of the crop row spacing. . With the development of my country's economy, the level of agricultural mechanization is in the process of continuous ...

AI Technical Summary

Problems solved by technology

At present, domestic tractors and agricultural machinery chassis generally have a fixed wheelbase, which is difficult to meet the requirements of mechanized crop field management; however, some existing public technologies have realized wheelbase adjustment, and the application number is "200920212687.X", and the name is The utility model patent of "adjustable wheelbase device" can realize the wheelbase adjustment by directly connecting the wheel and the drive shaft, or removing the distance-increasing connector, but the distance-increasing connector needs to be replaced during the wheelbase adjustment process. The adjustment is inconvenient; the application number is "200920223898.3", and the utility model patent named "Track Adjustment Mechanism for Vehicles" is connected to the wheel through a telescopic half shaft. Although it can also change the track of the vehicle, it focuses on adjusting the center of gravity of the vehicle. , to ensure the stable running of the vehicle, the adjustment range of the wheel base is small, and the application has certain limitations; the foreign model of the CASE spraying machine, PATRIOT4420, pushes the wheel supporting part to move relative to the frame through the hydraulic cylinder, and the wheel base can be realized. However, four groups of hydraulic cylinders drive each wheel supporting part to move independently. Due to the different moving resistance of each wheel, it is difficult to coordinate and move in unison, resulting in complex control and detection systems, high failure rates, and poor reliability and stability.

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