JPS5821017A - Semimanufactured connecting rod for engine - Google Patents

Abstract

PURPOSE:To shorten the material working process of a connecting rod and enable its mass production, by coupling the body and large-end bearing housing section of the connecting rod to each other through a conjoining part provided with incisions, when casting of forging the connecting rod. CONSTITUTION:When a semimanufactured connecting rod A is cast or forged, its body 1 and bearing housing section 2 are coupled to each other by a conjoining part 3. The conjoining part is provided with incisions 3a extending from both the end faces of the connecting rod A. The rod A is pinch-held on the both the end faces of the body 1 by a vise and the bearing housing section 2 is hit hard by a hammer from the side of the incisions 3 to the other side so that the conjoining part 3 is broken off at the incisions. After that, a wrist pin hole and a crankpin hole are machined. According to this constitution, the manufacturing process of the connecting rod is simplified, its machining is reduced and its mass production is enabled.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a connecting rod for an engine, and more particularly to a cast or forged connecting rod whose large end is formed by a connecting rod main body and a bearing cap.

Conventionally, the connecting rod of an engine is a clan! In order to assemble it to the shaft, the crankshaft is divided into molds along the plane through which the crankshaft metal passes, and consists of a connecting rod main body and a wheel bearing cap. Therefore, when manufacturing them, there are two ways to consider the composition of the casting material. Part 1 is the connecting rod main body, bearing cap, and o**tt, so the method is 6p1.
! In the case of casting them as one piece, or after casting, cutting them by machining will also cost O''e6.Although it is ML, the former requires more labor for casting, which inevitably increases costs. However, the cutting process by an unscrupulous metal saw is relatively inefficient, and the cutting process is not suitable for mass production, which also inevitably increases the cost.

The present invention aims to eliminate such problems. The present invention will be explained below with reference to illustrated examples.

The drawing shows a cast material made of iron or light alloy for the connecting rod according to the present invention. They are connected via extra wall 3 for connection. The main body 1 has a small end S having a piston pin hole 4 at one end, and a sun-shaped recess I forming a part of a crank bottle hole at the other end,
The bearing cap 2- has a semicircular recess 2a t- which is the remainder of the crankshaft hole. And those subjects 1
And what are the bearing caps? a and hollow S
Kankang owns his own house, and is killed by the extra meat St. The excess thickness 3 has a notch Ss at both ends of the connecting rod, and a triangular shape as shown in the 111m separation pipe. ), its corner 11a is cast ll01
1 work permit "gr@], as much as possible Km and cutout effect 1
*I like Mei. During this period, the circle shown by the two-dot chain line @ the closing circle for connecting the Hiro main body 1 and the bearing life Yap 2) (I
i indicates 1%A) hole.

The connecting rod O, which is formed as described above, the main body 1 and the bearing cap are integrally connected through the extra metal 3, and when casting and forging 11, Material pipe temporary Kl
I can make one. The cross-sectional area of the extra meat 3 is the same as the one at the time of construction. It is preferable that the part of the neck is made of cylindrical material with the rear knee so as to block the rear part, and that it is 6L cast or forged.

The raw material formed in this way is divided as follows before machining. That is, both end surfaces of the main body 1 are held in a vise or the like, and the bearing cap 2 is struck with a hammer 71 or the like from the notch 3a side to the other side.

Then, stress is concentrated on the excess thickness 3 due to the notch 3a, and the excess thickness 3 is relatively easily broken. Thereafter, the main body 1 and the bearing cap 2 are machined or folded in the same manner as in the prior art. That is, both end surfaces, the piston pin hole 4 and the Brangbin hole are roughly finished, a bolt hole 6 is drilled, and the two are connected with a bolt (not shown) K.

After that, each bottle hole is precisely finished, and if necessary, heat treatment and steel plating are applied. In this example, cast iron was used as the material, and the material broke immediately after casting, and was then subjected to strain increase and phosphor dulling. However, in this example, other materials, such as light alloys such as aluminum wam alloys, may not be used. quarrel.

As described above, the connecting rod product of the present invention consists of a main body of the connecting rod having one end formed by filling a part of the bottle hole of the crank bottle, and a portion of the connecting rod of the crank bottle having a diameter of about 1 m. The large ring holder is connected to the cap, the pipe, and the connecting layer through the life pipe, and also has a @ large part added to the excess material for the application of Zeng. Through forging, the materials of the Chain God Subject and the Wheel of Destiny Yap are temporarily formed, so the material factory is shortened. Then, by separating them, one of the main body and the bearing is fixed, and the other is hammered, which is a simple process, and the processing cost is high for a unit time. Since there is no need to use it, the child cost t-
It can be significantly reduced. Since a notch is provided in the excess meat of the meat, the excess meat becomes weaker and has the effect of being able to separate the main body, bearing cap, and tube by a comparative blow.

1, in the example, the p% notches 5a0811 provided on both end faces of the connecting rod are immersed in the p% notches 5a0811sat to narrow the width and the excess material is destroyed, or only one side is generally 0 which may be exceeded
Importantly, the bottom of the notch is made into a triangular shape to strengthen the notch -jI, but it is of course not necessary to cover this.

[Brief explanation of the drawing]

It is shown in the 10th Hiromoto book - IR〇 - 夷绽例会, 11m is the connecting rod Tei Seiaki t) EWIWA% 2 related is its vertical cross-sectional view, striped amFi shoes - 厘 danso map, 4 kaku is 2 It is an enlarged view of the main part indicated by the reference numeral 14 in the figure. M...Material, 1...Main body, 2...Bearing cap, 3...Extra thickness, SL...Notch. Patent Applicant Yamaha Motor Co., Ltd. Showa Manufacturing Co., Ltd. Agent Masaki Yamakawa (and one other person) Figure 1 Figure 2 Figure 3 Figure 4 Procedural Amendment (To the Commissioner of the Own Ships Patent Office ``4''km.9・'10
“2. Name of the invention Engine connecting rod product 3. Name of the person making the amendment (Name) (Mu07) Yamano Motor Co., Ltd. (and 1 other person) 6. Details of the amendment, page 4, line 17 ``Sometimes used.''
Next, breaking and separating the main body 1 and the bearing cap 2 may be performed after the bolt holes 6 are drilled, and in this case, the excess thickness 3 is further reduced and breaking becomes easier. ” is inserted. that's all

Claims (1)

[Claims] The main body of the connecting rod O, which has a recess formed in the form of a part of the bottle hole of the clan tabin at one end, and the bearing cap, which has a hollow tube forming the remainder of the bottle hole of the clan tabin, are connected via the extra wall for connection. A connecting rod product for an engine, which is provided with the above-mentioned missing part of extra thickness KgJ for connection.