1. A hitch for releasably interconnecting a propelling vehicle and a work implement comprising a first flat, thick rigid plate; a second flat, thick rigid plate; means for securing one of said plates to the propelling vehicle; means for securing the other of said plates to a work implement; means for limiting relative angular motion between said plates about an axis perpendicular to said plates; means for holding said plates in parallel, contiguous, contacting relationship when the hitch is in a fully engaged condition, said means for holding said plates in contacting relationship comprising a cylindrical peg protruding from said first plate in the direction of said second plate, said peg being substantially greater in length than the thickness of said second plate, said peg having a radially inwardly extending recess; a latch arm pivotally mounted on said second plate on the side opposite that which contacts said first plate; spring means for urging said latch arm into said recess in said peg when said hitch is in the fully engaged position; and a hollow cylindrical housing mounted on said second plate adjacent said latch arm, said housing being dimensioned to receive said peg, said housing having an opening therein to permit said latch to engage said recess in said peg, said second plate having an opening therein to permit said peg to pass through and enter said housing.

3. A hitch for releasably interconnecting a propelling vehicle and a work implement comprising a first flat, thick rigid plate; a second flat, thick rigid plate; means for securing one of said plates to the propelling vehicle; means for securing the other of said plates to a work implement; means for holding said plates in parallel, contiguous, contacting relationship when the hitch is in a fully engaged condition; and means for limiting relative angular motion between said plates about an axis perpendicular to said plates comprising guide blocks on one of said plates for contacting peripheral surfaces of the other of said plates.

4. A hitch for releasably interconnecting a propelling vehicle and a work implement comprising a first flat, thick rigid plate; a second flat, thick rigid plate; means for securing the other of said plates to a work implement; means for holding said plates in parallel, contiguous, contacting relationship when the hitch is in a fully engaged condition; means for limiting relative angular motion between said plates about an axis perpendicular to said plates; means for securing one of said plates to the propelling vehicle comprising means for pivotally mounting one side of said one of said plates to the frame of the vehicle; and fluid pressure operated means for moving the opposite side of said one of said plates to tilt the assembly about an axis perpendicular to the axis of said peg.

5. A hitch for releasably interconnecting a propelling vehicle and a work implement comprising the combination of a substantially reCtangular first plate; a substantially rectangular second plate of substantially the same size and shape as said first plate; one of said first and second plates having a section of cylindrical hollow tube fixedly attached to the center of the plate with the axis of said tube perpendicular to said plate, said tube having a transverse slot extending through one side thereof near said plate; a latch lever pivotally mounted on said plate and extending parallel thereto, said latch lever being movable into said slot; a central circular opening aligned with, and of the same diameter as, the interior of said tube; and spring means for urging said lever into said slot; the other of said first and second plates having a peg protruding from the center thereof, said peg being of a diameter to pass through said central opening and into said tube, said peg having a transverse slot positioned to align with the transverse slot in said tube when said peg is inserted therein; one of said first and second plates further having guide blocks fixedly mounted adjacent two corners thereof; and the other of said first and second plates having two notched corners to receive said guide blocks; means for mounting one of said first and second plates on a propelling vehicle; and a work implement mounted on the other of said plates.