Adjustable receiver structure

An adjustable receiving structure comprising:

• a tongue having a first end for removable installation within a receiver of a motor vehicle, and a second end;
• a fixed frame with a vertical channel mounted on the second end of said tongue;
• an inner arm having a first end pivotally mounted on said fixed frame and rotatable thereon at a first pivot point, and a second end;
• an outer arm having a first end pivotally mounted on the second end of said inner arm and rotatable thereon at a second pivot point, and a second end;
• an auxiliary receiver which has a receiving shape and size which corresponds to the receiver of the motor vehicle and which is pivotally mounted on the second end of said outer arm at a third pivot point;
• the auxiliary receiver being movable between a first closed position wherein the inner arm pivots relative to the fixed frame at the first pivot point and the outer arm pivots relative to the inner arm at the second pivot point and the auxiliary receiver is pivoted at the third pivot point so that the tongue and auxiliary receiver are substantially axially parallel and vertically aligned and the auxiliary receiver lies adjacent to said fixed frame, and a second open position wherein the inner arm pivots relative to the fixed frame at the first pivot point and the outer arm pivots relative to the inner arm at the second pivot point and the auxiliary receiver is pivoted at the third pivot point so that such that it is moved away from the tongue and the auxiliary receiver is swung away from the fixed frame to an extended position;
• and
• releasable locking structure for releasably locking said auxiliary receiver with respect to said fixed frame.