JP5279130B2 - Integrally molded propeller shaft - Google Patents
Integrally molded propeller shaft Download PDFInfo
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- JP5279130B2 JP5279130B2 JP2009090475A JP2009090475A JP5279130B2 JP 5279130 B2 JP5279130 B2 JP 5279130B2 JP 2009090475 A JP2009090475 A JP 2009090475A JP 2009090475 A JP2009090475 A JP 2009090475A JP 5279130 B2 JP5279130 B2 JP 5279130B2
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- propeller shaft
- yoke
- sectional shape
- shape
- shaft
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 239000013585 weight reducing agent Substances 0.000 abstract description 5
- 230000008961 swelling Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 230000001788 irregular Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
Description
本発明は、自動車の車両等に用いられるプロペラシャフトに関する。 The present invention relates to a propeller shaft used for an automobile vehicle or the like.
車両に用いられるプロペラシャフトは、エンジンの駆動力を車輪に伝達し、推進力を得るのに重要な部品である。
プロペラシャフトの両端部にはユニバーサル継手を接続するためのヨーク部を有し、回転に対する捻り剛性と軽量化が要求される。
A propeller shaft used in a vehicle is an important part for obtaining driving force by transmitting driving force of an engine to wheels.
Both end portions of the propeller shaft have yoke portions for connecting universal joints, and torsional rigidity and weight reduction with respect to rotation are required.
特許文献１には、一方の端部にヨーク部を一体成形した２個の部材を他方の端部にて摩擦撹拌接合により一体化したプロペラシャフトを開示する。
しかし、接合による機械的性質の低下が問題であり、また、接合部に応力集中しやすいことから接合部は一般部に比較して厚肉にしなければならないので製品の重量増になる。
Patent Document 1 discloses a propeller shaft in which two members having a yoke portion integrally formed at one end portion are integrated by friction stir welding at the other end portion.
However, deterioration of mechanical properties due to bonding is a problem, and since stress is concentrated on the bonded portion, the bonded portion must be thicker than the general portion, which increases the weight of the product.
プロペラシャフトは、回転駆動力を伝達する部品であることから、捻り強度を確保しつつ、軽量化を図るためにシャフトの一般部は円筒形状からなる場合が一般的である。
これに対してヨーク部はユニバーサル継手とクロス状に連結する方法を一般的に採用していることから、連結部の破壊強度が問題になる。
Since the propeller shaft is a component that transmits rotational driving force, the general portion of the shaft is generally formed in a cylindrical shape in order to reduce the weight while ensuring torsional strength.
On the other hand, since the yoke part generally employs a method of connecting to the universal joint in a cross shape, the breaking strength of the connection part becomes a problem.
しかし、従来の設計思想は、特許文献１にも見受けられるように、シャフトとしての円筒軸部からヨーク部にわたって外側形状も内側形状も円形状に形成するものになっている。
そのためにプロペラシャフトの軽量化が未だ不充分であった。
However, as can be seen in Patent Document 1, the conventional design concept is that the outer shape and the inner shape are formed in a circular shape from the cylindrical shaft portion as the shaft to the yoke portion.
For this reason, the weight reduction of the propeller shaft is still insufficient.
本発明は製品に要求される強度を確保しつつ、軽量化を図るのに効果的なヨーク部断面形状からなるプロペラシャフトの提供を目的とする。 An object of the present invention is to provide a propeller shaft having a yoke cross-sectional shape that is effective in reducing the weight while ensuring the strength required for a product.
本発明に係る一体成形プロペラシャフトは、内部が中空の円筒軸部の両端に、ジョイント部材と連結するためのヨーク部を当該円筒軸部と一体的に備えたアルミ製のプロペラシャフトであって、少なくとも一方のヨーク部は、外径寸法が前記円筒軸部の外径寸法と同じであり、径方向内側に膨出した増厚部を有し、且つ、周廻りに相対的に厚肉部と薄肉部とを有する異形中空断面形状になっていることを特徴とする。
ここで、前記一方のヨーク部の異形中空断面形状の最大厚肉部の肉厚に対する最小薄肉部の肉厚比が０．４〜０．６の範囲にあることが好ましい。
最小薄肉部の肉厚が最大厚肉部の肉厚の０．４未満だと破壊トルクが低下し、０．６を超えると軽量化効果が小さい。
The integrally formed propeller shaft according to the present invention is an aluminum propeller shaft provided integrally with the cylindrical shaft portion at both ends of the cylindrical shaft portion having a hollow inside, and a yoke portion for coupling with the joint member. At least one of the yoke parts has an outer diameter that is the same as the outer diameter of the cylindrical shaft part, has a thickened part that bulges inward in the radial direction, and a relatively thick part around the circumference. It has an irregular hollow cross-sectional shape having a thin-walled portion.
Here, it is preferable that the thickness ratio of the minimum thin-walled portion to the thickness of the maximum thick-walled portion of the modified hollow cross-sectional shape of the one yoke portion is in the range of 0.4 to 0.6.
When the thickness of the minimum thin portion is less than 0.4 of the thickness of the maximum thickness portion, the breaking torque is reduced, and when it exceeds 0.6, the lightening effect is small.
ヨーク部の異形中空断面形状は、外側形状が円筒軸部に沿った円形状であり、内側形状が略長方形、略偏平六角形や八角形等、ジョイント継手との連結部強度を考慮した各種異形断面を採用することが可能であるが、局部的応力集中を抑えるには内側の中空部形状が小判型になっているのが理想的である。 The irregular hollow cross-sectional shape of the yoke part is a circular shape with the outer shape along the cylindrical shaft part, and the inner shape is approximately rectangular, approximately flat hexagonal, octagonal, etc. Although it is possible to adopt a cross section, it is ideal that the shape of the hollow portion inside is an oval shape in order to suppress local stress concentration.
本発明に係るプロペラシャフトは軽量化を図ることができる点に特徴があり、材質を特に限定する必要がないが、本願出願人が先に提案した特開２００３−７１５１５号公報に開示する製造方法を取り込むことができる点でアルミ製であるのが好ましい。
上記技術を取り込むことにより、前記一方のヨーク部が異形中空断面形状であって、他方のヨーク部が断面中実の閉塞部になっていてもよい。
The propeller shaft according to the present invention is characterized in that the weight can be reduced, and the material is not particularly limited. However, the manufacturing method disclosed in Japanese Patent Laid-Open No. 2003-71515 previously proposed by the applicant of the present application. It is preferable that it is made of aluminum in that it can be taken in.
By incorporating the above technique, the one yoke portion may have an irregular hollow cross-sectional shape, and the other yoke portion may be a closed section having a solid cross section.
本発明に係るプロペラシャフトは、円筒軸部の両端にヨーク部を一体成形するとともに、少なくとも一方のヨーク部は、径方向内側に膨出した増肉部を有する異形中空断面形状を採用したことにより、プロペラシャフトとしての捻り強度等の品質を確保しつつ、大きな軽量化効果を得ることができる。 In the propeller shaft according to the present invention, the yoke portion is integrally formed at both ends of the cylindrical shaft portion, and at least one yoke portion adopts a modified hollow cross-sectional shape having a thickened portion bulging radially inward. A large weight reduction effect can be obtained while ensuring the quality such as torsional strength as the propeller shaft.
本発明に係るプロペラシャフトの例を以下図面に基づいて説明する。
図１はアルミニウム合金を用いて一体成形したプロペラシャフト粗材１０ａを示し、図２はヨーク部に所定の加工を施した製品としてのプロペラシャフト１０の例を示す。
プロペラシャフト粗材１０ａは、断面円筒形状の円筒軸部１１を有し、図１で示した例は左側端部が閉塞形状のヨーク部１３になっていて、右側端部が径方向内側に膨出した増肉部１２ａを有するヨーク部１２となっている。
ヨーク部１２は、（ａ）Ｄ−Ｄ線断面図から（ｅ）Ｈ−Ｈ線断面図まで順次示したように、外形形状は円筒軸部１１と同様にヨーク部１２の外形も円形状になっている。
これに対して、中空断面の内側の形状（中空部形状）は内径方向に膨出するように肉厚が増した徐変断面形状になっている。
この肉厚の徐変形状が、厚肉部のｔ１寸法と薄肉部のｔ２寸法とで異なり、本実施例では中空部１２ｂが小判型形状になっている。
An example of a propeller shaft according to the present invention will be described below with reference to the drawings.
FIG. 1 shows a propeller shaft coarse material 10a integrally formed using an aluminum alloy, and FIG. 2 shows an example of a propeller shaft 10 as a product in which a yoke is subjected to predetermined processing.
The coarse propeller shaft material 10a has a cylindrical shaft portion 11 having a cylindrical cross section. In the example shown in FIG. 1, the left end portion is a closed yoke portion 13, and the right end portion expands radially inward. The yoke portion 12 has the increased thickness portion 12a.
The yoke portion 12 has a circular outer shape similar to that of the cylindrical shaft portion 11 as shown in the order from (a) DD line sectional view to (e) HH sectional view. It has become.
On the other hand, the inner shape (hollow portion shape) of the hollow cross-section has a gradually changing cross-sectional shape with an increased thickness so as to bulge in the inner diameter direction.
This gradually deforming shape of the wall thickness is different between the t1 dimension of the thick part and the t2 dimension of the thin part, and in this embodiment, the hollow part 12b has an oval shape.
図１に示したプロペラシャフト粗材１０ａは、本願出願人が先に提案した特開２００３−７１５１５号公報に開示する技術を取り込むことでも製作できる。
例えば、コンテナ部の前方に押出ダイスを配置し、この押出ダイスの前方に閉塞部形状を成型する金型を固定及びフリーになるように連結した装置を用いる。
コンテナ部内にアルミ加工粗材を投入し、第１パンチにてヨーク部１３を閉塞鍛造する。
次に押出ダイスとその前方の金型の固定を解除し、後方より第２パンチにて押出加工する。
これにより円筒軸部１１が成形される。
円筒軸部（シャフト部）が所定の長さになると、第２パンチに替えてインナーが小判形状でアウターがコンテナ部内径形状になる第３複動パンチにてヨーク部１２を徐変成形する。
The rough propeller shaft material 10a shown in FIG. 1 can also be manufactured by incorporating the technique disclosed in Japanese Patent Laid-Open No. 2003-71515 previously proposed by the applicant of the present application.
For example, an extrusion die is disposed in front of the container portion, and a device in which a mold for molding the shape of the closed portion is connected to the front of the extrusion die so as to be fixed and free is used.
The aluminum processed coarse material is put into the container portion, and the yoke portion 13 is closed and forged with the first punch.
Next, the extrusion die and the die in front of it are released from the fixation, and extrusion is performed from the rear with a second punch.
Thereby, the cylindrical shaft portion 11 is formed.
When the cylindrical shaft portion (shaft portion) has a predetermined length, the yoke portion 12 is gradually changed with a third double-action punch in which the inner is an oval shape and the outer is a container portion inner diameter shape instead of the second punch.
次に、図１（ｅ）に示したヨーク部１２の小判型中空断面形状１２ｂの厚肉部のｔ１寸法と薄肉のｔ２寸法の相違による徐変部の破壊トルクと質量変化を比較調査した。
調査に用いたプロペラシャフトは外形寸法ｄ＝φ８０ｍｍで、円筒軸部の肉厚３．０ｍｍのものを用いた。
その結果を図３及び図４のグラフに示す。
図３のグラフにおいて、横軸は厚肉部ｔ１に対する薄肉部ｔ２の比（ｔ２／ｔ１）を示し、縦軸は徐変部の捻れ破壊トルク（Ｎｍ）の値を示す。
各折れ線グラフはｔ１の厚みが２３，２５，２７ｍｍのときのそれぞれ薄肉部ｔ２を変化させたときの、（ｔ２／ｔ１）と破壊トルクの関係を示す。
なお、ｔ２／ｔ１＝１のときの破壊トルクは従来の円筒形状の場合を示すことになる。
これに対して図４に示すグラフは、横軸の厚肉部ｔ１に対する薄肉部ｔ２の比（ｔ２／ｔ１）の変化とそれに対する徐変部の質量変化を縦軸に表したものであり、図３の目標線以上の破壊トルクを確保しつつ、図４の軽量化目標線以下の質量になるのがよいことになる。
今回調査した外形寸法ｄ＝φ８０ｍｍで、円筒軸部の肉厚３．０ｍｍのプロペラシャフトの場合、徐変部破壊トルク２０００Ｎｍ以上が目標線となり、仮に質量を１０％以上軽量化するには、ｔ２／ｔ１＝０．５〜０．６の範囲が良いことになる。
Next, the breaking torque and mass change of the gradually changing portion due to the difference in the t1 dimension of the thick part and the t2 dimension of the thin part of the oval hollow cross-sectional shape 12b of the yoke part 12 shown in FIG.
The propeller shaft used for the survey had an outer dimension d = φ80 mm and a cylindrical shaft portion with a wall thickness of 3.0 mm.
The results are shown in the graphs of FIGS.
In the graph of FIG. 3, the horizontal axis indicates the ratio (t2 / t1) of the thin portion t2 to the thick portion t1, and the vertical axis indicates the value of the torsional fracture torque (Nm) of the gradually changing portion.
Each line graph shows the relationship between (t2 / t1) and the breaking torque when the thin portion t2 is changed when the thickness of t1 is 23, 25, and 27 mm.
Note that the breaking torque when t2 / t1 = 1 indicates the case of a conventional cylindrical shape.
On the other hand, the graph shown in FIG. 4 shows the change in the ratio (t2 / t1) of the thin portion t2 to the thick portion t1 on the horizontal axis and the mass change of the gradually changing portion on the vertical axis. The mass should be equal to or less than the lighter weight target line of FIG. 4 while ensuring a breaking torque higher than the target line of FIG.
In the case of a propeller shaft having an outer dimension d = φ80 mm and a cylindrical shaft thickness of 3.0 mm investigated this time, a gradual change portion breaking torque of 2000 Nm or more becomes a target line, and if the weight is to be reduced by 10% or more, t2 The range of /t1=0.5 to 0.6 is good.
ヨーク部１２の中空部の形状を各種採用してＣＡＥ解析した結果、シャフト外径（円筒軸部）φ６０〜φ１２０の広い範囲にて、図１（ｅ）に示した厚肉部の寸法ｔ１に対して、薄肉部の寸法ｔ２の比が０．４〜０．６にて所定の破壊トルクを確保しつつ軽量化効果が得られ、ｔ２／ｔ１＝０．５〜０．６の範囲ではより大きい軽量効果があることが明らかになった。 As a result of CAE analysis by adopting various shapes of the hollow part of the yoke part 12, the dimension t1 of the thick part shown in FIG. 1 (e) is obtained in a wide range of the shaft outer diameter (cylindrical shaft part) φ60 to φ120. On the other hand, when the ratio of the dimension t2 of the thin-walled portion is 0.4 to 0.6, a light weight reduction effect is obtained while securing a predetermined breaking torque, and in the range of t2 / t1 = 0.5 to 0.6 It became clear that there was a big light weight effect.
１０ プロペラシャフト
１０ａ プロペラシャフト粗材
１１ 円筒軸部
１２ ヨーク部
１２ａ 増肉部
１３ ヨーク部
DESCRIPTION OF SYMBOLS 10 Propeller shaft 10a Propeller shaft rough material 11 Cylindrical shaft part 12 Yoke part 12a Thickening part 13 Yoke part
Claims (4)
少なくとも一方のヨーク部は、外径寸法が前記円筒軸部の外径寸法と同じであり、径方向内側に膨出した増厚部を有し、且つ、周廻りに相対的に厚肉部と薄肉部とを有する異形中空断面形状になっていることを特徴とする一体成形プロペラシャフト。 An aluminum propeller shaft provided integrally with the cylindrical shaft portion at both ends of the hollow cylindrical shaft portion with a yoke portion connected to the joint member,
At least one of the yoke portions has an outer diameter dimension that is the same as the outer diameter dimension of the cylindrical shaft portion, has a thickened portion that bulges radially inward, and is relatively thick around the circumference. An integrally formed propeller shaft characterized by having a deformed hollow cross-sectional shape having a thin portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009090475A JP5279130B2 (en) | 2009-04-02 | 2009-04-02 | Integrally molded propeller shaft |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009090475A JP5279130B2 (en) | 2009-04-02 | 2009-04-02 | Integrally molded propeller shaft |
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| Publication Number | Publication Date |
|---|---|
| JP2010242817A JP2010242817A (en) | 2010-10-28 |
| JP5279130B2 true JP5279130B2 (en) | 2013-09-04 |
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| JP2009090475A Expired - Fee Related JP5279130B2 (en) | 2009-04-02 | 2009-04-02 | Integrally molded propeller shaft |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102705330B (en) * | 2012-06-13 | 2015-01-07 | 中联重科股份有限公司 | Pin shaft, mounting structure for pin shaft, and concrete pumping equipment |
| CN102705329B (en) * | 2012-06-13 | 2014-05-21 | 中联重科股份有限公司 | Hinge pin, hinge pin mounting structure and concrete pumping equipment |
| JP6539422B1 (en) * | 2019-02-27 | 2019-07-03 | 株式会社ショーワ | Method of manufacturing power transmission shaft |
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| JPS4927948Y1 (en) * | 1966-05-17 | 1974-07-30 | ||
| JPH0942266A (en) * | 1995-07-31 | 1997-02-10 | Toyota Autom Loom Works Ltd | Drive shaft made of fiber-reinforced composite material and manufacture thereof |
| JP2003322135A (en) * | 2002-04-26 | 2003-11-14 | Showa Denko Kk | Propeller shaft and manufacturing method thereof |
| JP4354330B2 (en) * | 2004-04-16 | 2009-10-28 | 株式会社リケン | Cast hollow crankshaft and manufacturing method thereof |
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