JPH0247799Y2 - - Google Patents
Info
- Publication number
- JPH0247799Y2 JPH0247799Y2 JP1984007552U JP755284U JPH0247799Y2 JP H0247799 Y2 JPH0247799 Y2 JP H0247799Y2 JP 1984007552 U JP1984007552 U JP 1984007552U JP 755284 U JP755284 U JP 755284U JP H0247799 Y2 JPH0247799 Y2 JP H0247799Y2
- Authority
- JP
- Japan
- Prior art keywords
- phase sintered
- sintered alloy
- shaft
- liquid phase
- parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000956 alloy Substances 0.000 claims description 39
- 229910045601 alloy Inorganic materials 0.000 claims description 39
- 239000007791 liquid phase Substances 0.000 claims description 24
- 239000007790 solid phase Substances 0.000 claims description 17
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 238000009792 diffusion process Methods 0.000 claims description 4
- 230000004323 axial length Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
- Gears, Cams (AREA)
- Powder Metallurgy (AREA)
Description
【考案の詳細な説明】
この考案は、焼結合金製のカムロブ、ジヤーナ
ル等の構成部品をシヤフトに組付けてなる組立カ
ムシヤフトに関する。カムシヤフトは従来、鋳造
による中実一体構造のものが、一般的であるが、
非常に重いものであるので、近年エンジンの軽量
化のために、鋼製の中空ステムに金属製のカムロ
ブ、ジヤーナル等の構成部品を組付けたものが使
用されてきている。しかしながらまだ一層の軽量
化が望まれている。[Detailed Description of the Invention] This invention relates to an assembled camshaft in which components such as a cam lobe and journal made of sintered alloy are assembled to a shaft. Traditionally, camshafts have generally been of solid, one-piece construction by casting.
They are extremely heavy, so in recent years, engines with hollow steel stems assembled with metal components such as cam lobes and journals have been used to reduce the weight of engines. However, further weight reduction is still desired.
一方、組立カムシヤフトの構成部品は耐摩耗
性、潤滑性、及びシヤフトへの組付性の点から液
相焼結合金を使用する手段がある。しかし液相焼
結合金は空孔量が少なく、含油性が低い上、硬く
て加工性が悪いので量産性の点でも問題がある。
そこで構成部品を内周側、外周側に分割し、外周
側に充分な含油性を維持する固相焼結合金を配
し、シヤフトと結合される内周側には外周側に配
した固相焼結合金と同一温度で焼結される液相焼
結合金を配し、内周側合金とシヤフト、及び内周
側合金と外周側合金とを拡散結合により一体に結
合する方法がある。しかしこの場合においては、
硬く加工性のよくない液相焼結合金が内周側に存
在するので、構成部品に油孔を設ける際、加工が
困難であるという問題があつた。 On the other hand, there is a method of using a liquid phase sintered alloy for the component parts of the assembled camshaft from the viewpoint of wear resistance, lubricity, and ease of assembly to the shaft. However, liquid phase sintered alloys have a small amount of pores, low oil receptivity, are hard and have poor workability, and therefore have problems in terms of mass production.
Therefore, the component is divided into an inner circumferential side and an outer circumferential side, and a solid phase sintered alloy that maintains sufficient oil-retaining properties is placed on the outer circumferential side, and a solid phase sintered alloy placed on the outer circumferential side is placed on the inner circumferential side that is connected to the shaft. There is a method in which a liquid-phase sintered alloy that is sintered at the same temperature as the sintered alloy is disposed, and the inner peripheral alloy and the shaft, and the inner peripheral alloy and the outer peripheral alloy are integrally bonded by diffusion bonding. However, in this case,
Since the liquid phase sintered alloy, which is hard and has poor workability, is present on the inner circumferential side, there is a problem in that it is difficult to form oil holes in the component.
この考案は従来のこの欠点を除去するために、
構成部品の固相焼結合金部分の内周の軸方向中央
部に溝を設けておいて二分割し、その溝に、溝の
軸方向長さより長い軸方向長さを有する液相焼結
合金をはさみこんだものであつて、分割された固
相焼結合金の間に分割溝を形成し、そのためカム
シヤフトが軽量となる効果を有するものである。 In order to eliminate this drawback of the conventional method, this invention
A liquid phase sintered alloy is formed by providing a groove in the axial center of the inner periphery of the solid phase sintered alloy part of the component and dividing it into two, and the groove has an axial length longer than the axial length of the groove. A dividing groove is formed between the divided solid phase sintered alloys, which has the effect of making the camshaft lighter.
図について説明すれば、第１図は従来のカムシ
ヤフトを示し、シヤフト１に組付けられた構成部
品２は外周の固相焼結合金部分３と内周の液相焼
結部分４とからなつている。そしてシヤフトと液
相、固相の両焼結合金部分の三者は拡散結合によ
り一体結合されている。 To explain the diagrams, FIG. 1 shows a conventional camshaft, in which a component 2 assembled to the shaft 1 consists of a solid-phase sintered alloy part 3 on the outer periphery and a liquid-phase sintered part 4 on the inner periphery. There is. The shaft, the liquid phase, and the solid phase sintered alloy portions are integrally bonded by diffusion bonding.
この従来のカムシヤフトでは液相焼結合金が硬
く加工性が悪いので、油孔等をあけるのに困難で
ある。又、圧粉成形時に固相焼結合金と液相焼結
合金の双方に予め設ける方法もあるが、これだと
加工は容易になるが、外周側の固相焼結合金と内
周側の液相焼結合金の両油孔及びシヤフトの油孔
の位置決め精度の必要が生じるという問題があ
る。は構成部品の軸方向長さを示している。 In this conventional camshaft, the liquid phase sintered alloy is hard and has poor workability, making it difficult to drill oil holes and the like. There is also a method in which both the solid-phase sintered alloy and the liquid-phase sintered alloy are provided in advance during powder compacting, but this makes processing easier, but the solid-phase sintered alloy on the outer circumference and the inner circumference are There is a problem in that it is necessary to position both the oil holes of the liquid phase sintered alloy and the oil hole of the shaft with high precision. indicates the axial length of the component.
第２図は、この考案のカムシヤフトの一実施例
を示す。固相焼結合金部分は軸方向中央部で二分
割して、内周側に溝３１を有する固相焼結合金部
分３と、同じく溝３１′を有する部分３′とし、そ
の溝に分割前の溝の軸方向長さより長い軸方向長
さを有する液相焼結合金部分４を嵌めこむ。そう
すれば固相焼結合金部分３，３′の間に分割溝５
が形成される。そして部分３，３′及び分割溝５
の夫々の軸方向長さの合計を通常の構成部品の
長さと同じになるようにする。溝５のためカムシ
ヤフトは軽量となる。 FIG. 2 shows an embodiment of the camshaft of this invention. The solid phase sintered alloy part is divided into two parts at the center in the axial direction to form a solid phase sintered alloy part 3 having a groove 31 on the inner circumferential side and a part 3' also having a groove 31'. A liquid phase sintered alloy portion 4 having an axial length longer than the axial length of the groove is fitted. Then, the dividing groove 5 is formed between the solid phase sintered alloy parts 3 and 3'.
is formed. and parts 3, 3' and dividing groove 5
The sum of the axial lengths of each of the parts is the same as the length of the normal component. The groove 5 makes the camshaft lightweight.
又、構成部品に油孔を設ける場合にも、中央部
に環状溝が成形されているので、液相焼結合金部
に圧粉成形時に貫通孔を形成するのみで加工数が
非常に少なくてすむ上に、位置決め精度の必要も
ない。油孔は液相焼相焼結合金部材の外周面とシ
ヤフトの内周面を貫通するものである。６は液相
焼結合金部に設けられた油孔、７はシヤフト１に
あけられた油孔を示す。 Also, when providing oil holes in component parts, since the annular groove is formed in the center, the number of machining operations is extremely small, as the through holes are only formed in the liquid phase sintered alloy part during powder compaction. In addition, there is no need for positioning accuracy. The oil hole penetrates the outer peripheral surface of the liquid phase sintered alloy member and the inner peripheral surface of the shaft. Reference numeral 6 indicates an oil hole provided in the liquid phase sintered alloy part, and 7 indicates an oil hole drilled in the shaft 1.
この考案の組立カムシヤフトは、焼結によつて
シヤフトと液相焼結合金、及び液相、固相の両焼
結部分とを拡散結合により一体結合させて構成部
品をシヤフトに結合する。 In the assembled camshaft of this invention, the shaft and the liquid-phase sintered alloy and both the liquid-phase and solid-phase sintered parts are integrally bonded by diffusion bonding by sintering, thereby bonding the component parts to the shaft.
第３図は、この考案の他の実施例を示すもので
分割溝の両側にそれに直角に溝３１，３１′を設
け、液相焼結部分４の外周端の環状突出部４１が
嵌めこまれている。このようにすると、シヤフ
ト、固相、液相両焼結合金の三者が一層良好に結
合される。 FIG. 3 shows another embodiment of this invention, in which grooves 31 and 31' are provided on both sides of the dividing groove at right angles thereto, into which an annular protrusion 41 at the outer peripheral end of the liquid phase sintered part 4 is fitted. ing. In this way, the shaft, the solid phase, and the liquid phase double sintered alloy are bonded together even better.
この考案の構成部品はこのような構成であつ
て、分割溝の存在により軽量化を図ることがで
き、位置決め精度の必要なく、少ない加工数で液
相焼結合金部に油孔を設けることができるもので
ある。 The component parts of this invention have such a structure, and the presence of the dividing grooves makes it possible to reduce the weight, and it is possible to provide oil holes in the liquid phase sintered alloy part with a small number of machining operations without the need for positioning accuracy. It is possible.
第１図は従来のカムシヤフトを示す図、第２図
はこの考案のカムシヤフトの一実施例を示すたて
断面図、第３図は同じく別の実施例を示す断面図
である。
符号の説明、１……シヤフト、２……構成部
品、３……固相焼結合金、４……液相焼結合金、
５……分割溝、６，７……油孔、３１……溝、４
１……液相焼結部の環状突出部。
FIG. 1 is a diagram showing a conventional camshaft, FIG. 2 is a vertical sectional view showing one embodiment of the camshaft of this invention, and FIG. 3 is a sectional view showing another embodiment. Explanation of symbols, 1...Shaft, 2...Component, 3...Solid phase sintered alloy, 4...Liquid phase sintered alloy,
5...Divided groove, 6, 7...Oil hole, 31...Groove, 4
1... Annular protrusion of liquid phase sintered part.
Claims (1)
品を組付け一体化させてなる組立カムシヤフトに
おいて、構成部品は、軸方向中央部で二分割され
て間隔を設けてシヤフトに嵌合された固相焼結合
金部分と、分割された２つの固相焼結合金部分の
間のシヤフトに隣接する部分に嵌め込まれた液相
焼結合金部分とよりなり、シヤフト、固相焼結合
金部分、液相焼結合金部分の三者が拡散結合によ
り一体結合され、且つ前記液相焼結合金部材の外
周面とシヤフトの内周面とを貫通する油孔が設け
られていることを特徴とする組立カムシヤフト。 In an assembled camshaft in which component parts such as a cam lobe and journal are assembled and integrated with a shaft, the component parts are solid-phase sintered alloys that are divided into two parts in the axial center and fitted to the shaft at intervals. and a liquid phase sintered alloy part fitted into the part adjacent to the shaft between the two divided solid phase sintered alloy parts, and the shaft, the solid phase sintered alloy part, and the liquid phase sintered alloy part. An assembled camshaft characterized in that three parts are integrally joined by diffusion bonding, and an oil hole is provided that penetrates the outer peripheral surface of the liquid phase sintered alloy member and the inner peripheral surface of the shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP755284U JPS60121553U (en) | 1984-01-25 | 1984-01-25 | assembly camshaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP755284U JPS60121553U (en) | 1984-01-25 | 1984-01-25 | assembly camshaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60121553U JPS60121553U (en) | 1985-08-16 |
| JPH0247799Y2 true JPH0247799Y2 (en) | 1990-12-14 |
Family
ID=30486004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP755284U Granted JPS60121553U (en) | 1984-01-25 | 1984-01-25 | assembly camshaft |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60121553U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004056191B4 (en) * | 2004-11-20 | 2008-08-28 | Mahle Ventiltrieb Gmbh | Camshaft for in particular motor vehicle engines |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51117223A (en) * | 1975-04-07 | 1976-10-15 | Kubota Ltd | Camming mechanism in valve-opening etc of internal-combustion engine |
| JPS57154556A (en) * | 1981-03-19 | 1982-09-24 | Nippon Piston Ring Co Ltd | Manufacturing method of cam shaft |
| JPS5841211A (en) * | 1981-09-04 | 1983-03-10 | Nippon Piston Ring Co Ltd | Cam shaft |
-
1984
- 1984-01-25 JP JP755284U patent/JPS60121553U/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51117223A (en) * | 1975-04-07 | 1976-10-15 | Kubota Ltd | Camming mechanism in valve-opening etc of internal-combustion engine |
| JPS57154556A (en) * | 1981-03-19 | 1982-09-24 | Nippon Piston Ring Co Ltd | Manufacturing method of cam shaft |
| JPS5841211A (en) * | 1981-09-04 | 1983-03-10 | Nippon Piston Ring Co Ltd | Cam shaft |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60121553U (en) | 1985-08-16 |
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