JPH0658230U - Internal combustion engine connecting rod - Google Patents

Abstract

(57) [Summary] [Purpose] Separate metal parts are abolished. [Structure] The rod portion 1 comprises a small end portion 3, a rod portion 4 and a constituent portion 6 of a semi-annular large end portion 5, which is a U-shaped section 7
And 8 are joined together to form a hollow shape. Large end 5
The bearing component 9 including the R portion 9a and the rib 9b is coupled to the inner peripheral surface of the. The bearing component 9 has a metal portion 10 formed by applying a metal. On the other hand, the cap portion 2 is formed in a hollow shape by joining the U-shaped parts 12 and 13 in cross section, and is provided with the R portion 11a and the rib 11b, and the metal portion 1 is provided.
A bearing component 11 having the same shape as the bearing component 9 in which 0 is formed is coupled.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a connecting rod for an internal combustion engine.

[0002]

[Prior art]

 Conventionally, hollow connecting rods have been proposed for connecting rods of internal combustion engines in order to reduce their weight.

As a connecting rod for such a conventional internal combustion engine, there is one as shown in FIG. 7, for example. (See, for example, Japanese Utility Model Laid-Open No. 64-18622).

That is, FIG. 7 is an exploded view of the component parts. The rod part forms hollow parts 101 and 102 mainly forming the small end part and the rod part, and mainly the large end part. It is composed of a solid part 103 and a metal 104.

The cap portion is composed of a solid cap 105 and a metal 104.

[0006]

[Problems to be solved by the device]

 However, in such a conventional connecting rod for an internal combustion engine, since the component 103 forming the large end has a solid structure, a metal material such as Kelmet is directly attached to the R portion of the solid component 103. It is technically difficult to apply it to make it metalless, and the metal 104, which is a separate component, was used. Therefore, there is a problem that the cost becomes high.

The present invention has been made in view of such conventional problems, and an object thereof is to provide a connecting rod of an internal combustion engine which can be made into a metalless material.

[0008]

[Means for Solving the Problems]

 Therefore, the present invention relates to a connecting rod formed by connecting a cap portion and a rod portion including a small end portion, a rod portion, and a semi-annular large end portion to each other. A connecting rod of an internal combustion engine was constructed by using a bearing part in which an R portion and a rib portion were formed by pressing a flat plate whose inner peripheral surface was coated with a metal material.

[0009]

[Action]

 After the metal is applied to the flat plate to form the metal portion, the flat plate is pressed to form the bearing component having the R portion and the rib. Therefore, it is possible to easily eliminate the metal of another component and make it metalless.

Further, since the ribs are provided and the ribs are joined when the constituent parts are joined to form the connecting rod, the metal portion is not damaged.

[0011]

【Example】

 Hereinafter, the present invention will be described with reference to the drawings. 1 to 6 are views showing an embodiment of the present invention.

As shown in FIG. 1, the rod portion 1 is integrally formed with a small end portion 3, a rod portion 4, and a constituent portion 6 of a semi-annular large end portion 5. The rod portion 1 is formed in a hollow shape by joining two U-shaped cross-section parts 7 and 8 as shown in FIG. To the inner peripheral surface of the large end portion 5, a bearing component 9 having an R portion 9a and a rib 9b as shown in FIG. 3 which is a view taken in the direction of arrow C in FIG. 1 is coupled. The bearing component 9 is formed with a metal portion 10 to which metal is applied.

On the other hand, the cap portion 2 is formed in a hollow shape by joining parts 12 and 13 having U-shaped cross sections as shown in FIG. 4 showing the BB cross section of FIG. A bearing component 11 having the same structure as the bearing component 9 having an R portion 11a and a rib 9b on the inner peripheral surface of the cap portion 2 and having a metal portion 10 coated with a metal is coupled.

Next, a manufacturing method will be described. As shown in FIG. 5, the bearing parts 9 and 11 are formed by pressing a flat plate 14 on which a metal material such as Kelmet is applied to form a metal part 10.

Both the rod portion 1 and the cap portion 2 are formed by joining the respective components using amorphous material or the like. At the time of joining, the metal is protected by circulating water through the metal part 10. In order to protect the metal part 10, the bearing parts 9 and 11 and other parts are joined to each other by providing rib parts 9b and 11b on the bearing parts 9 and 11 as shown in FIG. Do it in place.

As described above, in this embodiment, the metal material is applied to the flat plate 14 to form the metal portion 10, and then the bearing parts 9 and 11 are manufactured by molding with a press. The material can be applied easily.

As described above, since the metal can be integrally formed with the bearing component, the metal can be eliminated and the assembling work of the metal can be eliminated, so that the cost can be reduced. Also, since the metal of the separate part is eliminated, the heat conduction is improved, and the temperature of the hot water in the crankpin part is lowered and the lubrication performance is improved. Furthermore, by making the large end hollow, the weight of the connecting rod can be reduced.

[0018]

[Effect of device]

 With the configuration as described above, according to the present invention, the metal can be formed integrally with the bearing component.

Therefore, the cost is reduced by reducing the number of parts. In addition, heat conduction is improved, the oil temperature at the crank pin is lowered, and the lubrication performance is improved. Further, the effect of reducing the weight of the connecting rod due to the hollowing of the large end can be obtained.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing exploded components of an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a view on arrow C of FIG.

4 is a sectional view taken along line BB of FIG.

FIG. 5 is a plan view illustrating a method of manufacturing the bearing components 9 and 11 according to the embodiment of the present invention.

FIG. 6 is a perspective view showing bearing components 9 and 11 according to the embodiment.

FIG. 7 is an exploded perspective view showing components of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Rod part 2 ... Cap part 7,8,12,13 ... U-shaped cross-section part 9,11 ... Bearing part 9a, 11a ... R part 9b, 11b ... Rib 10 ... Metal part

Claims (1)

[Scope of utility model registration request] 1. A connecting rod comprising a cap portion and a rod portion comprising a small end portion, a rod portion, and a semi-annular large end portion, and a semi-annular large end portion of the rod portion and an inner peripheral surface of the cap portion. A connecting rod for an internal combustion engine, comprising a bearing part having a rounded portion and a rib portion formed by pressing a flat plate coated with a metal material.