Toy wheel assembly

Abstract

A toy wheel assembly including a first wheel having a first surface and a second surface, a second wheel having a third surface and a fourth surface and a cylindrical shaft. The cylindrical shaft having a first edge and a second edge. The first wheel is connected to the second wheel by the cylindrical shaft. The first edge of the cylindrical shaft is perpendicularly mounted to a center of the second surface of the first wheel, and the second edge of the cylindrical shaft is perpendicularly mounted to a center of the third surface of the second wheel. Such that the first wheel and the second wheel rotate around a joint axis in unison, and the cylindrical shaft maintains a predetermined gap between the second surface and the third surface.

What is claimed is: 
     
         1 . A toy wheel assembly, comprises:
 a first wheel having a first surface and a second surface;   a second wheel having a third surface and a fourth surface; and   a cylindrical shaft having a first edge and a second edge, wherein the first wheel is connected to the second wheel by the cylindrical shaft, wherein the cylindrical shaft is perpendicularly mounted to a center of the second surface of the first wheel by the first edge, and the cylindrical shaft is perpendicularly mounted to a center of the third surface of the second wheel by the second edge, wherein the first wheel and the second wheel rotate around a joint axis in unison, and wherein the cylindrical shaft maintains a predetermined gap between the second surface and the third surface, wherein the predetermined gap is larger than a width of the first wheel and a width of the second wheel by at least a first predetermined value.   
     
     
         2 . The toy wheel assembly of  claim 1 , wherein the width of the predetermined gap is adapted to accept a toy part having at least one groove by a first groove of the at least one groove, so that the cylindrical shaft of the toy wheel assembly rotate freely within the groove of the at least one groove of the toy part. 
     
     
         3 . The toy wheel assembly of  claim 1 , wherein the cylindrical shaft is mounted to the center of the second surface and the center of the third surface by at least one of: gluing and screwing. 
     
     
         4 . The toy wheel assembly of  claim 1 , wherein at least one of the center of the second surface and the center of the third surface includes a socket, wherein the socket is adapted to receive an edge of the cylindrical shaft by insertion. 
     
     
         5 . The toy wheel assembly of  claim 2 , wherein the predetermined gap is larger than a width of a side of the toy part that includes the first groove of the at least one groove of the toy part by a second predetermined value. 
     
     
         6 . The toy wheel assembly of  claim 5 , wherein the first predetermined value and the second predetermined value are identical. 
     
     
         7 . The toy wheel assembly of  claim 5 , wherein the first predetermined value and the second predetermined value are different.