Work vehicles

Abstract

To provide a work vehicle capable of keeping comfortable steering operation as making a vehicle body flexibly follow change of terrain.SOLUTION: A work vehicle comprising a rear vehicle body frame and a front vehicle body frame, comprises: a front joint part located at a rear end of the front vehicle body frame and provided with a first spherical surface slipping bearing and a second spherical surface slipping bearing 310a1 which are arranged in a vertical direction; a rear joint part connected to, through a third spherical surface slipping bearing, a connection member 330 connected to the front joint part 300 through the first spherical surface slipping bearing and connected thereto through the second spherical surface slipping bearing 310a1, and located on the rear vehicle body frame; and a cylinder 450 connected to the front joint part through a fourth spherical surface slipping bearing 452 and connected to the rear vehicle body frame through a fifth spherical surface slipping bearing 451, wherein the fourth spherical surface slipping bearing 452 is arranged on the same horizontal surface as the second spherical surface slipping bearing 310a1.SELECTED DRAWING: Figure 6

Claims

1. A work vehicle comprising a rear body frame and a front body frame connected to the rear body frame so as to be rotatable with respect to an axial axis perpendicular to the horizontal plane of the rear body frame and a longitudinal axis, A front joint located at the rear end of the front body frame, comprising a first spherical sliding bearing and a second spherical sliding bearing arranged vertically, A connecting member that connects to the front joint via the first spherical sliding bearing and a rear joint located at the tip of the rear vehicle frame, which is connected via the third spherical sliding bearing and the second spherical sliding bearing, A work vehicle comprising a cylinder connected to the front joint via a fourth spherical sliding bearing and connected to the rear vehicle frame via a fifth spherical sliding bearing, wherein at least a portion of the fourth spherical sliding bearing is arranged on the same horizontal plane as at least a portion of the second spherical sliding bearing.

2. The work vehicle according to claim 1, wherein the first spherical sliding bearing is positioned above the second spherical sliding bearing.

3. The aforementioned front joint portion protrudes from the rear end of the front vehicle frame and comprises a first protruding portion and a second protruding portion arranged vertically. The work vehicle according to claim 2, wherein the fourth spherical sliding bearing is pivotally connected to the second protruding portion and the second spherical sliding bearing is mounted thereon.

4. The work vehicle according to claim 3, wherein the cylinder is located below the driver's unit which is located above the rear body frame.

5. The work vehicle according to claim 4, wherein the tube of the cylinder is located below the operating section.

6. The work vehicle according to claim 5, wherein the third spherical sliding bearing is located below the operating section.

7. The work vehicle according to claim 6, wherein the third spherical sliding bearing is supported via a support shaft on a protruding portion at the rear of the rear joint.

8. The work vehicle according to claim 7, further comprising a pair of restricting members formed to sandwich the connecting member at the upper part of the rear joint.

9. The work vehicle according to claim 8, wherein the distance between the pair of regulating members narrows from front to rear.

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