Abstract: A loader attachment system is configured so as to detachably attach a loader to a vehicle by detachably attaching a mast of the loader to a loader mount fixed on the vehicle. The loader attachment system includes a support device, a location device, and an engagement device. The support device is configured to support the mast on the loader mount so that the mast is rotatable relative to the loader mount. The location device is configured to locate the mast supported on the loader mount by the support device at an attachment position. The engagement device is configured to engage the mast at the attachment position with the loader mount so as to prevent the mast from rotating in a direction to detach the mast from the loader mount. The support device, the location device and the engagement device are configured independent of one another.

Abstract: A working vehicle comprises a vehicle body, a quick hitch, a working implement connected to the vehicle body via the quick hitch, and a linkage interposed between the quick hitch and the vehicle body. The linkage is movable to raise and lower the quick hitch so as to locate the quick hitch at an optional height. The quick hitch can be inclined to a certain degree in a pitching direction of the vehicle body at the optional height defined by the linkage.

Abstract: A working vehicle comprises a vehicle body, a quick hitch, a working implement connected to the vehicle body via the quick hitch, and a linkage interposed between the quick hitch and the vehicle body. The linkage is movable to raise and lower the quick hitch so as to locate the quick hitch at an optional height. The quick hitch can be inclined to a certain degree in a pitching direction of the vehicle body at the optional height defined by the linkage.

Abstract: A loader attachment system is configured so as to detachably attach a loader to a vehicle by detachably attaching a mast of the loader to a loader mount fixed on the vehicle. The loader attachment system includes a support device, a location device, and an engagement device. The support device is configured to support the mast on the loader mount so that the mast is rotatable relative to the loader mount. The location device is configured to locate the mast supported on the loader mount by the support device at an attachment position. The engagement device is configured to engage the mast at the attachment position with the loader mount so as to prevent the mast from rotating in a direction to detach the mast from the loader mount. The support device, the location device and the engagement device are configured independent of one another.

Abstract: A seat support structure for a working vehicle comprises a fixed plate, a parallel link mechanism, a supporting plate, a rotation shaft, a rotation plate, a seat, a rear upper shaft, and a rotation lock unit. The fixed plate is fixed on a vehicle body of the vehicle. The parallel link mechanism includes a front link and a rear link. The supporting plate is connected to the fixed plate via the parallel link mechanism. The rotation shaft is fixed on a center portion of the supporting plate. The rotation plate is rotatably supported on the rotation shaft. The seat is attached to the rotation plate. The rear upper shaft connects the rear link to the supporting plate. The rotation lock unit is provided on the rear upper shaft.

Abstract: A backhoe includes a boom with one end rotatably supported by a supporting structure fixed on a working vehicle, and a boom cylinder with one end rotatably supported by the supporting structure, and with another end rotatably supported by the boom, the boom cylinder that drives the boom by operating in a freely retractable manner. The boom cylinder includes a piston, a cylinder tube that contains the piston, a piston rod connected to the piston, a scale rod fixed in parallel to the piston rod and operates along the outer surface of the cylinder tube in response to an operation of the piston rod, a scale arranged on the outer surface of the cylinder tube along the scale rod, and an indicator provided on the piston rod and operates along the scale in response to the operation of the piston rod.

Abstract: For providing a supporting structure for the excavator changes the fitting height of the backhoe, This invention provides a supporting structure of excavator for attaching the backhoe with variable height which comprising: an attachment mount fixed to a frame, and an adjuster plate fixed to the attachment mount, wherein the backhoe is mounted to an appropriate position of the adjuster plate.

Abstract: A seat support structure for a working vehicle comprises a fixed plate, a parallel link mechanism, a supporting plate, a rotation shaft, a rotation plate, a seat, a rear upper shaft, and a rotation lock unit. The fixed plate is fixed on a vehicle body of the vehicle. The parallel link mechanism includes a front link and a rear link. The supporting plate is connected to the fixed plate via the parallel link mechanism. The rotation shaft is fixed on a center portion of the supporting plate. The rotation plate is rotatably supported on the rotation shaft. The seat is attached to the rotation plate. The rear upper shaft connects the rear link to the supporting plate. The rotation lock unit is provided on the rear upper shaft.

Abstract: For providing a supporting structure for the excavator changes the fitting height of the backhoe, This invention provides a supporting structure of excavator for attaching the backhoe with variable height which comprising: an attachment mount fixed to a frame, and an adjuster plate fixed to the attachment mount, wherein the backhoe is mounted to an appropriate position of the adjuster plate.

Abstract: A work machine having: a working part; a holding part for holding the working part; and an operating part for rotating the working part around the holding part; further comprising: an angle sensing means for sensing the angle of the working part from the horizontal; and a controller for adjusting and holding the position of the working part by use of the operation means based on the angle sensing means.