Vehicle chassis with tread adjusted in stepless adjustment mode

Abstract

The invention belongs to the technical field of vehicle chassises and relates to a vehicle chassis with tread adjusted in stepless adjustment mode. Two groups of vehicle tread stepless adjustment devices share a vehicle longitudinal central plane and are arranged at the front position and the rear position of a vehicle frame according to wheel wheelbase, and the two groups of vehicle tread stepless adjustment devices are respectively fixedly connected with the front end of the rear end of the vehicle frame through a horizontal track of a support to form the vehicle chassis with tread adjustedin stepless adjustment mode. Each group of vehicle tread stepless adjustment device is composed of cranks, sliding blocks, connection rods, supporting rods, wheel axles, wheels, gears and a support. External force power synchronously drives the two driving gears in the front group and the rear group of vehicle tread stepless adjustment devices to rotate, and synchronously changes and maintains turning angles theta of the cranks in the front group and the rear group of vehicle tread stepless adjustment devices to the identical. The distance between the wheels and the vehicle longitudinal central plane changes symmetrically, so that the vehicle chassis achieves tread stepless adjustment and meets requirements for mechanized operation of crops with different line spacing. The vehicle chassiswith tread adjusted in stepless adjustment mode is suitable for field management mechanized operation of the crops in the growth period.

Description

technical field [0001] The invention belongs to the technical field of vehicle chassis, in particular to a vehicle chassis with stepless wheelbase adjustment. Background technique [0002] my country is a vast agricultural country with a wide range of crops. There are many types of crops in the north and 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 growth period of crops, field management mechanization operations such as weeding, spraying, and fertilization require operating vehicles to walk along the row spacing of crops. Therefore, the wheelbase of the agricultural vehicle chassis is required to be adjusted according to the change of the row spacing of the crops, and an agricultural vehicle chassis with a large wheelbase adjustment is required. . With the development of our country's economy, the level of ag...

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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