JPH044517U

JPH044517U -

Info

Publication number: JPH044517U
Application number: JP4495090U
Authority: JP
Priority date: 1990-04-26
Filing date: 1990-04-26
Publication date: 1992-01-16

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示す要部側断面図
、第２図及び第３図はクランク軸長手方向中央部
分及び軸端部分のクランクピン部に設けられる中
空孔の断面形状を示す第１図矢印Ｅ方向から視た
夫夫正面図、第４図は従来の４気筒用クランク軸
の第２及び第３クランクピン部に高周波焼入れを
施した場合のクランク軸の変形態様を示した概略
側面図、第５図は従来の４気筒用クランク軸の第
１及び第４クランクピン部に高周波焼入れを施し
た場合のクランク軸の変形態様を示した概略側面
図、第６図Ａは焼入れ前の４気筒用クランク軸の
概略図、第６図Ｂは同クランク軸の第１及び第４
クランクピン部と第２及び第３クランクピン部に
夫々焼入れを施した場合の変形態様を示した線図
、第６図Ｃは同クランク軸のすべてのクランクピ
ン部に焼入れを施した場合の最終変形態様を示し
た線図である。１０……クランク軸、１２……クランクピン部
、１４……ジヤーナル部、２０……中空孔。 Fig. 1 is a side cross-sectional view of a main part showing an embodiment of the present invention, and Figs. 2 and 3 show cross-sectional shapes of hollow holes provided in the crank pin portions of the longitudinal center and end portions of the crankshaft. Fig. 1 is a front view of the husband viewed from the direction of arrow E, and Fig. 4 shows the deformation of the conventional 4-cylinder crankshaft when the second and third crank pin portions are induction hardened. A schematic side view, Fig. 5 is a schematic side view showing the deformation of the crankshaft when the first and fourth crank pin portions of a conventional 4-cylinder crankshaft are subjected to induction hardening, and Fig. 6A is a schematic side view showing the deformation of the crankshaft when induction hardening is applied to the first and fourth crank pin portions of a conventional 4-cylinder crankshaft. A schematic diagram of the previous four-cylinder crankshaft, Figure 6B shows the first and fourth crankshafts of the same crankshaft.
A diagram showing the deformation when the crank pin part and the second and third crank pin parts are respectively hardened. Figure 6C shows the final state when all the crank pin parts of the same crankshaft are hardened. It is a line diagram showing a deformed form. 10... Crankshaft, 12... Crank pin portion, 14... Journal portion, 20... Hollow hole.

Claims

[Scope of utility model registration request]

In a crankshaft that is equipped with three or more crank pin parts, each of which is induction hardened on its outer peripheral surface, and has a hollow hole extending approximately in the axial direction, the central part in the longitudinal direction of the crank shaft. The cross-sectional area of the hollow hole provided in the crank pin portion located at is smaller than the cross-sectional area of the hollow hole provided in the crank pin portion located on the longitudinal end side of the crank pin portion. The crankshaft of a multi-cylinder engine.