Steering device for semi-trailer tractor

Abstract

The invention provides a semi-trailer tractor steering device, belongs to the technical field of vehicle traction and aims to solve a technical problem that a semi-trailer vehicle in an existing semi-trailer tractor cannot follow up and steer within a reasonable angle range. The semi-trailer tractor steering device comprises a lower tray connected with a tractor and an upper tray connected with a semi-trailer vehicle, wherein the lower tray and the upper tray are connected and can oppositely rotate; a steering mechanism capable of rotating and connected with semi-trailer vehicle wheels is arranged between the lower tray and the upper tray; when the lower tray steers within a preset angle, the steering mechanism is connected with the lower tray and rotates along with the lower tray; when the lower tray rotates to a position out of the preset angle, the steering mechanism is separated from the lower tray and connected with the upper tray; a follow-up steering angle of the semi-trailer vehicle wheels is controlled with a reasonable angle scope, and the semi-trailer vehicle wheels can steer in a follow-up manner, and do not steer excessively, so that the scope of a blind area is reduced, the accident occurrence probability is reduced, and the semi-trailer vehicle is prevented from drifting or laterally turning over.

Description

technical field [0001] The invention belongs to the technical field of vehicle traction, and relates to a steering device, in particular to a semi-trailer tractor steering device. Background technique [0002] The semi-trailer is the same as all motor vehicles. During the turning process, the driving wheel traces of the rear wheels and the front wheels are not in the same arc. The turning radius of the front inner wheel is larger, while the turning radius of the rear inner wheel is smaller. The inner wheel forms a difference in turning radius, which easily creates a blind spot, and the driver cannot see the road conditions in the blind spot. If there are cars or pedestrians in the blind spot, the semi-trailer will easily scrape the cars or pedestrians on both sides during the turning process. fall, resulting in a safety accident. [0003] In response to this situation, people have invented a device that can make the rear wheel of a motor vehicle rotate with the front wheel....

AI Technical Summary

Problems solved by technology

[0002] The semi-trailer is the same as all motor vehicles. During the turning process, the driving wheel traces of the rear wheels and the front wheels are not in the same arc. The turning radius of the front inner wheel is larger, while the turning radius of the rear inner wheel is smaller. The inner wheel forms a difference in turning radius, which easily creates a blind spot, and the driver cannot see the road conditions in the blind spot. If there are cars or pedestrians in the blind spot, the semi-trailer will easily scrape the cars or pedestrians on both sides during the turning process. fall, resulting in a safety accident

[0003] In response to this situation, people have invented a device that can make the rear wheel of a motor vehicle rotate with the front wheel. , left front steering shaft, front tie rod, right front steering arm, right front wheel, right front steering shaft are sequentially connected, right rear steering shaft, right rear wheel, right rear steering arm, rear tie rod, left rear steering shaft, left rear steering arm, right The rear wheels are connected sequentially, the active lever is hinged with the right front steering arm, the driven lever is hinged with the right rear steering arm, and the active lever can slide in the driven lever. The radius difference from the front wheel when turning, thereby reducing the blind spot of the motor vehicle when turning, but the device will carry the following technical problems when used on a semi-trailer, because the semi-trailer body is longer and larger, when turning, if the rear If the wheel steering angle is too small, the effect of the rear wheel follow-up steering will be poor, the turning radius difference between the front and rear wheels will still be large, and there will still be a large range of blind spots. If the rear wheel steering angle is too large, it will make the rear of the semi-trailer Large inertia will easily cause the semi-trailer to flick or roll over. Therefore, the steering angle of the rear wheel of the semi-trailer must be controlled within a reasonable range

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