PROBLEM TO BE SOLVED: To enhance a strength of a hollow rack bar provided with a screw hole.SOLUTION: A hollow rack bar 2 comprising a tubular shaft material 10, in which a part of the shaft material 10 in an axial direction is provided a tooth part 11 having plural rack teeth 12, and ends 13 of the shaft material 10 on both sides in the axial direction are respectively provided with a screw hole 14. The hollow rack bar is manufactured in such a manner that the end 13 of the shaft material 10 provided with the tooth part 11 is compressed in the axial direction, a cross section, which is perpendicular to the axial direction, in at least a part of the end 13 in the axial direction is increased, and the screw hole 14 is formed on an inner periphery of the end 13 having the increased cross section.SELECTED DRAWING: Figure 3
【課題】ネジ孔が設けられる中空ラックバーの両端部の強度を高める。【解決手段】管状の軸材10からなり、軸材10の軸方向の一部に複数のラック歯12を有する歯部11が設けられ、且つ軸材10の軸方向の両側の端部13にネジ孔14がそれぞれ設けられた中空ラックバー2は、歯部11が設けられた軸材10の端部13を軸方向に圧縮し、端部13における軸方向の少なくとも一部で軸方向に垂直な断面積を拡大させ、断面積が拡大された端部13の内周にネジ孔14を形成して製造される。【選択図】図3
HOLLOW RACK BAR AND METHOD FOR MANUFACTURING HOLLOW RACK BAR
中空ラックバー及び中空ラックバーの製造方法
2017-03-30
Patent
Electronic Resource
Japanese
IPC: | B21K MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS , Herstellen von Schmiede- oder Presserzeugnissen aus Metall, z.B. Hufeisen, Nieten, Bolzen oder Rädern / B21J FORGING , Schmieden / B62D MOTOR VEHICLES , Motorfahrzeuge / C21D Veränderung der physikalischen Struktur von Eisenmetallen , MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS / F16H Getriebe , GEARING |
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