| 摘要 |
Disclosed is an auxiliary wheel shaft structure for a vehicle having an improved structure. According to the present invention, a sufficient ground clearance can be ensured while a large-capacity air spring with a relatively large height is applied. Also, a sufficient space can be ensured for self-steering and power steering while structural stability and firmness are improved. The auxiliary wheel shaft structure for a vehicle includes a frame that is coupled with a vehicle body; a rod arm that is rotatably coupled with the frame about an axis of rotation; a lift air bag and a ride air bag that are provided in the frame, are expanded by compressed air, and lift and lower auxiliary wheels; and an axle that connects the auxiliary wheels. The rod arm is provided with a bent portion, and at least a part of the bent portion is formed to be bent upward. The axle is fastened to a lower side of the bent portion. The auxiliary wheel shaft structure for a vehicle can be significantly improved in structural strength, and a deformation of the auxiliary wheel shaft structure for a vehicle can be minimized against a larger force compared to a linear rod arm of the related art. Also, the present invention can be controlled in vertical and horizontal directions while a stable driving effect can be obtained. In addition, tire wear and vehicle body impact are decreased, fuel economy is improved, a sufficient ground clearance is ensured, interference with a driving shaft, the axle, and the like is effectively prevented, and load weight distribution is optimized. |
