| 摘要 |
<p>PURPOSE:To make truck structure simpler and stronger by fastening brackets to insert the right and left ends of a beam projected from the lower frame to the upper surfaces of the right and left frames and by jointing the beam and brackets with pins. CONSTITUTION:Box-shaped cases 3 and 4 instaled under the lower frame 5 are connected with right and left truck frames 2L and 2R. A box-shaped beam 12 is projected from the lower frame in right and left directions. The right and left ends of the beam 12 and the brackets 13 designed to connect the right and left truck frames are fastened on the upper surfaces of the right and left truck frames. The beam 12 and the brackets 13 are jointed with pins 16. The beam can resist against torsion load due to its complete box shape design. Since the lower frame is connected with the truck frames where the least bending moment is produced, the strength is sufficient enough to design low weight truck construction. Compared with the previous design, the new device is capable of reducing mechanical work and increasing working accuracy.</p> |
