High-strength steering device of semi-trailer towing vehicle

Abstract

The invention relates to a high-strength steering device of a semi-trailer towing vehicle. The high-strength steering device comprises a lower tray connected with the towing vehicle and an upper tray connected with a semi-trailer, the lower tray is connected with the upper tray, the upper tray and the lower tray can rotate relative to each other, and a steering mechanism is arranged between the lower tray and the upper tray. When the lower tray steers at a preset angle, the steering mechanism is connected with the lower tray and rotates along with the lower tray, and when the lower tray rotates to the positions beyond the preset angle, the steering mechanism is separated from the lower tray and is connected with the upper tray. The steering device comprises a gear ring which is arranged between the upper tray and the lower tray, and the gear ring is connected with wheels of the semi-trailer and is made of high-strength steel which comprises 0.38%-0.50% of C, 0.1%-0.3% of Si, 0.6%-0.9% of Mn, 1.1 %-1.5% of Cr, 0.15%-0.25% of Ni, 0.02%-0.1% of Nb, 0.1%-0.3% of V, and the balance Fe. The high-strength steering device can steer within reasonable angles and is long in service life.

Description

technical field [0001] The invention belongs to the technical field of vehicle traction, and relates to a steering device, in particular to a high-strength steering device for a semi-trailer tractor. 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 enables the rear wheels of a motor vehicle to rotat...

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 enables the rear wheels of a motor vehicle to rotate with the front wheels. Arm, 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, The right 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. This steering device can realize the follow-up steering of the rear wheels, reducing the rear The radius difference between the wheel and the front wheel when turning reduces the blind spot of the motor vehicle when turning. However, when the device is used on a semi-trailer, it will carry the following technical problems. Because the semi-trailer has a long body and a large volume, when turning, if If the steering angle of the rear wheels is too small, the follow-up steering effect of the rear wheels will be poor, the turning radius difference between the front and rear wheels is still large, and there is still a large range of blind spots. If the steering angle of the rear wheels is too large, it will make the semi-trailer The tail produces a large inertia, which may 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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