WO2020174698A1 - Method for manufacturing power transmission shaft - Google Patents

Method for manufacturing power transmission shaft Download PDF

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Publication number
WO2020174698A1
WO2020174698A1 PCT/JP2019/010053 JP2019010053W WO2020174698A1 WO 2020174698 A1 WO2020174698 A1 WO 2020174698A1 JP 2019010053 W JP2019010053 W JP 2019010053W WO 2020174698 A1 WO2020174698 A1 WO 2020174698A1
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WO
WIPO (PCT)
Prior art keywords
power transmission
transmission shaft
manufacturing
tubular body
closed
Prior art date
Application number
PCT/JP2019/010053
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French (fr)
Japanese (ja)
Inventor
森　健一
貴博 中山
一希 大田
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株式会社ショーワ
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Publication of WO2020174698A1 publication Critical patent/WO2020174698A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/22—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or type of main drive shafting, e.g. cardan shaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B4/00—Shrinkage connections, e.g. assembled with the parts at different temperature; Force fits; Non-releasable friction-grip fastenings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/20—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections using bayonet connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C3/00—Shafts; Axles; Cranks; Eccentrics
    • F16C3/02—Shafts; Axles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
    • F16D1/064—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end non-disconnectable
    • F16D1/068—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end non-disconnectable involving gluing, welding or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
    • F16D1/064—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end non-disconnectable
    • F16D1/072—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end non-disconnectable involving plastic deformation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/26—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected

Definitions

  • the present invention relates to a method for manufacturing a power transmission shaft.
  • the propeller shaft (power transmission shaft) of an automobile extends in the front-rear direction of the vehicle and transmits the power generated by the prime mover and decelerated by the transmission to the final reduction gear.
  • a propeller shaft one having a tubular body made of fiber reinforced plastic and a connecting member connected to an end portion of the tubular body can be cited (for example, Patent Document 1).
  • Patent Document 1 describes a technique in which a connecting member is press-fitted and connected to the opening at the end of the tubular body with serration engagement.
  • connection structure of Patent Document 1 it is necessary to increase the processing accuracy of the serration in order to maintain the press-fitted state and to control the slide load at the time of a frontal collision of the vehicle. Becomes higher. Further, in order to maintain the press-fitted state in the tube body, it is necessary to additionally form a hoop winding layer in the connection range with the connecting member, which also increases the manufacturing cost of the power transmission shaft. Further, water, dust, and the like may enter the inside of the pipe body from the serrations.
  • the present invention has been made to solve the above problems, and an object of the present invention is to manufacture a power transmission shaft capable of connecting a tubular body and a connecting member with a simple structure and reducing the manufacturing cost. To provide a method.
  • the present invention is directed to manufacturing a power transmission shaft including a tubular body made of fiber reinforced plastic having a closed portion at least one end of which is closed, and a connecting member connected to an end portion of the tubular body.
  • the power transmission shaft 1 includes a tube body 2 having an axis O1 as a central axis, a stub yoke 3 as a connecting member connected to the inside of the first connecting portion 120 of the tube body 2, and the tube body 2. And a stub shaft 4 as a connecting member connected to the inside of the second connecting portion 130.
  • the tube body 2 is made of carbon fiber reinforced plastic (CFRP).
  • CFRP carbon fiber reinforced plastic
  • the reinforcing fiber used in the fiber-reinforced plastic in the present invention is not limited to carbon fiber, and may be glass fiber or aramid fiber.
  • the tubular body 2 includes a main body 110, a first connecting portion 120 arranged on the front side of the main body 110, a second connecting portion 130 arranged on the rear side of the main body 110, a main body 110 and a second connection.
  • An inclined portion 140 located between the portion 130 and the portion 130.
  • the outer diameter of the main body portion 110 is reduced from the central portion 113 toward both ends (front end portion (other end portion) 111 and rear end portion (one end portion) 112). Is larger than the outer diameter of both ends (front end (other end) 111 and rear end (one end) 112). That is, when the main body 110 is cut along the axis O1, the cross-sectional shape of the outer peripheral surface of the main body 110 is an arc shape that draws a gentle curve and projects outward. Therefore, the outer shape of the main body 110 has a barrel shape in which the central portion 113 bulges outward in the radial direction.
  • the plate thickness of the main body part 110 becomes thinner from both end parts (front end part (other end part) 111 and rear end part (one end part) 112) toward the central part 113. Is formed thinner than the plate thickness of both end portions (front end portion (other end portion) 111 and rear end portion (one end portion) 112).
  • the inner peripheral surface of the first connecting portion 120 has a polygonal shape following the polygonal connecting portion 5 of the stub yoke 3.
  • the inner peripheral surface of the second connecting portion 130 also has a polygonal shape following the polygonal connecting portion 6 of the stub shaft 4.
  • the outer diameter of the inclined portion 140 gradually decreases from the main body 110 side toward the second connecting portion 130 side, and has a truncated cone shape.
  • the plate thickness of the inclined portion 140 gradually decreases from the end portion on the second connection portion 130 side (rear side) toward the end portion on the main body 110 side (front side). For this reason, the plate thickness of the front end portion of the inclined portion 140 is the thinnest and constitutes a weak portion. From the above, when the vehicle collides with the power transmission shaft 1 from the front and a collision load is input, a shearing force acts on the inclined portion 140 inclined with respect to the axis O1.
  • the front end portion (fragile portion) of the inclined portion 140 is damaged. Therefore, at the time of a vehicle collision, the engine and the transmission mounted on the front portion of the vehicle body quickly move backward, and the collision energy is absorbed by the front portion of the vehicle body.
  • the stub yoke 3 is a metal member that constitutes a cardan joint.
  • the connecting portion 5 of the stub yoke 3 has a tubular shape with an opening on the rear end side.
  • the outer peripheral surface of the connecting portion 5 has a polygonal shape when viewed in the direction of the axis O1.
  • the stub shaft 4 is a metal member that constitutes a constant velocity joint.
  • the stub shaft 4 is formed at the front end of the connecting portion 7 and the connecting portion 7 that is connected to the power transmission member of the constant velocity joint so as to rotate integrally, and is pushed into the closing portion 8 to be described later, so that the tubular body 2 And the connecting portion 6 connected to the inside of the second connecting portion 130.
  • the outer peripheral surface of the connecting portion 6 has a polygonal shape when viewed in the direction of the axis O1.
  • the first embodiment relates to a manufacturing method when the tubular body 2 contains a thermosetting resin.
  • the manufacturing method of the first embodiment includes a preparation step (step S1) of preparing the tubular body 2 having the closed portion 8 formed at the end thereof, and a stub on the closed portion 8 in the softened state.
  • a pushing step of pushing in the shaft 4 (step S2) and a hardening step of hardening the closed portion 8 (step S3) are provided.
  • the rear end portion of the second connecting portion 130 of the tubular body 2 has a rearward facing closing portion 8 integrated from the peripheral surface portion so as to close the inside of the tubular body 2 without opening. Is formed in.
  • the closing portion 8 may be flat or curved.
  • the tubular body 2 is prepared with at least the closed portion 8 in a softened state before thermosetting.
  • the connecting portion 6 of the stub shaft 4 is pushed forward along the axis O1 into the closed portion 8 in the softened state.
  • the closed portion 8 is plastically deformed, and the closed portion 8 is formed with a recess 9 that follows the outer shape of the connection portion 6.
  • the concave portion 9 has a polygonal shape in which the bottom portion is in close contact with the front end surface of the connecting portion 6 and the inner peripheral portion is in close contact with the polygonal portion of the connecting portion 6.
  • the annular pressing jig 10 may be applied to the outer periphery of the second connecting portion 130 in the pushing step.
  • the closed portion 8 is thermoset by a heating means (not shown).
  • a heating means not shown.
  • the concave portion 9 firmly adheres to the surface of the connecting portion 6, and the tubular body 2 and the stub shaft 4 are connected.
  • the heating means the tube 2 and the stub shaft 4 may be installed in a heating furnace, or a heating device may be built in the holding jig 10 and the closing part 8 may be heated by this heating device. Good.
  • the power transmission shaft 1 including the tubular body 2 made of fiber reinforced plastic and the connecting member (stub shaft 4) connected to the end portion of the tubular body 2, the above-described preparation step, pushing step, and curing According to the manufacturing method including the steps, highly accurate serration processing is not required, the tube 2 and the connecting member can be easily connected by utilizing the deformation and hardening of the tube 2, and the manufacturing cost can be reduced. No adhesive is required, and the work process is simplified. Since the end of the tubular body 2 is closed by the closing portion 8, there is no possibility that water, dust or the like will enter the inside of the tubular body 2.
  • the outer diameter of the tubular body 2 is reduced from the central portion 113 toward both ends (front end (other end) 111, rear end (one end) 112).
  • 110 is provided.
  • the barrel-shaped portion is formed in the main body portion 110 of the tubular body 2 in which bending stress is likely to concentrate, and has a predetermined bending strength.
  • both end portions (front end portion (other end portion) 111 and rear end portion (one end portion) 112) of the main body portion 110 in which bending stress is hard to concentrate are lightened by forming the outer diameters to be small.
  • the weight is reduced due to the thin plate thickness. Therefore, the power transmission shaft 1 is reduced in weight while ensuring a predetermined bending rigidity of the central portion 113, and the dangerous rotational speed is increased.
  • the second embodiment relates to a manufacturing method when the tubular body 2 contains a thermoplastic resin. Also in the manufacturing method of the second embodiment, a preparatory step of preparing the tubular body 2 having the closed portion 8 formed at the end, a pushing step of pushing the stub shaft 4 into the softened closed portion 8, and a hardening of the closed portion 8. And a curing step.
  • the rear end portion of the second connecting portion 130 of the tubular body 2 is integrally formed with the closing portion 8 facing rearward so as to close the inside of the tubular body 2 without opening. Is formed in.
  • the preparation step of the second embodiment includes a heating step of heating the closed portion 8 to soften it.
  • the heating means for example, an annular heating device 11 applied to the outer periphery of the second connecting portion 130 is used.
  • the connecting portion 6 of the stub shaft 4 is pushed forward along the axis O1 into the closed portion 8 in the softened state.
  • the closed portion 8 is plastically deformed, and the closed portion 8 is formed with a recess 9 that follows the outer shape of the connection portion 6.
  • the concave portion 9 has a polygonal shape in which the bottom portion is in close contact with the front end surface of the connecting portion 6 and the inner peripheral portion is in close contact with the polygonal portion of the connecting portion 6.
  • the closed portion 8 is cooled and hardened by natural cooling or the like.
  • the concave portion 9 firmly adheres to the surface of the connecting portion 6, and the tubular body 2 and the stub shaft 4 are connected.
  • the method for manufacturing the power transmission shaft according to the third embodiment also includes a preparatory step of preparing the tubular body 2 having the closed portion 8 formed at the end, and a stub shaft for the closed portion 8 in the softened state.
  • a pushing step of pushing in 4 and a hardening step of hardening the closed portion 8 are provided.
  • the power transmission shaft 101 of the third embodiment is a main body in which the tubular body 2 has a uniform outer diameter from one end (rear end 112) to the other end (front end 111).
  • the unit 110 is provided.
  • the shape of the tubular body 2 can be simplified and the molding cost can be reduced.
  • the method for manufacturing the power transmission shaft according to the fourth embodiment also includes a preparation step of preparing the tubular body 2 having the closed portion 8 formed at the end, and a stub shaft for the closed portion 8 in the softened state.
  • a pushing step of pushing in 4 and a hardening step of hardening the closed portion 8 are provided.
  • the tubular body 2 has a uniform outer diameter from the central portion 113 to the front end portion (the other end portion) 111, and from the central portion 113 to the rear end. An outer diameter is reduced toward the portion (one end portion) 112, and a main body portion 110 having an outer peripheral surface formed in a curved shape in the direction of the axis O1 is provided.
  • the manufacturing method of the present invention is applied to the connection between the pipe body 2 and the stub shaft 4, but the present invention is also applicable to the connection between the pipe body 2 and the stub yoke 3.

Abstract

A method for manufacturing a power transmission shaft provided with a fiber-reinforced plastic tube (2), at least one end of which has a closed section (8), and a stub shaft (4) connected to an end section of the tube (2), wherein the method comprises a preparation step for preparing the tube (2), an insertion step for inserting the stub shaft (4) into the closed section (8) after the preparation step, and a curing step for curing the closing section (8) after the insertion step. A connection part between the tube (2) and the stub shaft (4) is formed in a polygonal shape.

Description

動力伝達軸の製造方法Method for manufacturing power transmission shaft
　本発明は、動力伝達軸の製造方法に関する。 The present invention relates to a method for manufacturing a power transmission shaft.
　自動車のプロペラシャフト（動力伝達軸）は、車両の前後方向に延びて、原動機で発生し変速装置で減速された動力を終減速装置に伝達する。プロペラシャフトの従来例として、繊維強化プラスチック製の管体と、管体の端部に接続する連結部材と、を備えたものが挙げられる（例えば、特許文献１）。特許文献１には、管体の端部の開口部に、連結部材をセレーション係合を伴って圧入して接続する技術が記載されている。 　The propeller shaft (power transmission shaft) of an automobile extends in the front-rear direction of the vehicle and transmits the power generated by the prime mover and decelerated by the transmission to the final reduction gear. As a conventional example of a propeller shaft, one having a tubular body made of fiber reinforced plastic and a connecting member connected to an end portion of the tubular body can be cited (for example, Patent Document 1). Patent Document 1 describes a technique in which a connecting member is press-fitted and connected to the opening at the end of the tubular body with serration engagement.
特開平７－２０５３４０号公報JP-A-7-205340
　しかしながら、特許文献１の接続構造によれば、圧入状態の保持のためおよび車両の前方衝突の際のスライド荷重の制御のために、セレーションの加工精度を上げる必要があり、動力伝達軸の製造コストが高くなる。また、管体には、圧入状態を保持するために、連結部材との接続範囲にフープ巻き層を追加形成する必要があり、この点からも動力伝達軸の製造コストが高くなる。さらに、セレーションから水や塵埃等が管体の内部に浸入するおそれもある。 However, according to the connection structure of Patent Document 1, it is necessary to increase the processing accuracy of the serration in order to maintain the press-fitted state and to control the slide load at the time of a frontal collision of the vehicle. Becomes higher. Further, in order to maintain the press-fitted state in the tube body, it is necessary to additionally form a hoop winding layer in the connection range with the connecting member, which also increases the manufacturing cost of the power transmission shaft. Further, water, dust, and the like may enter the inside of the pipe body from the serrations.
　本発明は、以上のような問題を解決するために行われたものであり、その目的は、管体と連結部材とを簡単な構造で接続でき、製造コストの低減を図れる動力伝達軸の製造方法を提供することにある。 The present invention has been made to solve the above problems, and an object of the present invention is to manufacture a power transmission shaft capable of connecting a tubular body and a connecting member with a simple structure and reducing the manufacturing cost. To provide a method.
　前記課題を解決するため、本発明は、少なくとも一端が閉塞された閉塞部を有する繊維強化プラスチック製の管体と、前記管体の端部に接続する連結部材と、を備える動力伝達軸の製造方法であって、前記管体を準備する準備工程と、前記準備工程の後に、前記閉塞部に前記連結部材を押し込む押込工程と、前記押込工程の後に、前記閉塞部を硬化させる硬化工程と、を備えることを特徴とする。 In order to solve the above problems, the present invention is directed to manufacturing a power transmission shaft including a tubular body made of fiber reinforced plastic having a closed portion at least one end of which is closed, and a connecting member connected to an end portion of the tubular body. A method, a preparatory step of preparing the tubular body, a pushing step of pushing the connecting member into the closed portion after the preparatory step, and a curing step of curing the closed portion after the pushing step, It is characterized by including.
　本発明によれば、セレーション加工が不要となり、管体の変形および硬化を利用して管体と連結部材とを簡単に接続できるので、製造コストの低減を図れる。接着剤も不要となり、作業工程が簡略化される。管体は、閉塞部により端部が塞がれているので、管体の内部への水や塵埃等の浸入のおそれもない。 According to the present invention, serration processing is not necessary, and the deformation and hardening of the pipe can be used to easily connect the pipe and the connecting member, so that the manufacturing cost can be reduced. No adhesive is required, and the work process is simplified. Since the end portion of the tubular body is closed by the closed portion, there is no possibility that water, dust or the like will enter the inside of the tubular body.
第一実施形態の動力伝達軸の側面図である。It is a side view of the power transmission shaft of a first embodiment. 第一実施形態の製造方法における準備工程の説明図である。It is explanatory drawing of the preparation process in the manufacturing method of 1st embodiment. 第一実施形態の製造方法における押込工程の説明図である。It is explanatory drawing of the pushing process in the manufacturing method of 1st embodiment. 第一実施形態の製造方法における硬化工程の説明図である。It is explanatory drawing of the hardening process in the manufacturing method of 1st embodiment. 動力伝達軸の製造方法のフローチャートである。It is a flow chart of a manufacturing method of a power transmission shaft. 第二実施形態の製造方法における準備工程の説明図である。It is explanatory drawing of the preparation process in the manufacturing method of 2nd embodiment. 第二実施形態の製造方法における押込工程の説明図である。It is explanatory drawing of the pushing process in the manufacturing method of 2nd embodiment. 第二実施形態の製造方法における硬化工程の説明図である。It is explanatory drawing of the hardening process in the manufacturing method of 2nd embodiment. 第三実施形態の動力伝達軸の側面図である。It is a side view of a power transmission shaft of a third embodiment. 第四実施形態の動力伝達軸の側面図である。It is a side view of a power transmission shaft of a fourth embodiment.
　各実施形態について図面を参照しながら説明する。各実施形態では、本発明の動力伝達軸を、ＦＦ（Ｆｒｏｎｔ－ｅｎｇｉｎｅ　Ｆｒｏｎｔ－ｄｒｉｖｅ）ベースの四輪駆動車に搭載されるプロペラシャフトに適用した例を挙げる。また、各実施形態で共通する技術的要素には、共通の符号を付し、重複説明は省略する。 Each embodiment will be described with reference to the drawings. In each embodiment, an example in which the power transmission shaft of the present invention is applied to a propeller shaft mounted on an FF (Front-engine Front-drive)-based four-wheel drive vehicle will be described. Further, the same reference numerals are given to the technical elements common to the respective embodiments, and the duplicate description will be omitted.
　図１に示すように、動力伝達軸１は、軸線Ｏ１を中心軸とする管体２と、管体２の第一接続部１２０の内側に接続する連結部材としてのスタブヨーク３と、管体２の第二接続部１３０の内側に接続する連結部材としてのスタブシャフト４とを備えている。管体２は、炭素繊維強化プラスチック（ＣＦＲＰ）で形成されている。本発明において繊維強化プラスチックに使用される強化繊維は、炭素繊維に限られず、ガラス繊維やアラミド繊維であってもよい。 As shown in FIG. 1, the power transmission shaft 1 includes a tube body 2 having an axis O1 as a central axis, a stub yoke 3 as a connecting member connected to the inside of the first connecting portion 120 of the tube body 2, and the tube body 2. And a stub shaft 4 as a connecting member connected to the inside of the second connecting portion 130. The tube body 2 is made of carbon fiber reinforced plastic (CFRP). The reinforcing fiber used in the fiber-reinforced plastic in the present invention is not limited to carbon fiber, and may be glass fiber or aramid fiber.
　管体２は、本体部１１０と、本体部１１０の前側に配置された第一接続部１２０と、本体部１１０の後側に配置された第二接続部１３０と、本体部１１０と第二接続部１３０との間に位置する傾斜部１４０と、を備えている。 The tubular body 2 includes a main body 110, a first connecting portion 120 arranged on the front side of the main body 110, a second connecting portion 130 arranged on the rear side of the main body 110, a main body 110 and a second connection. An inclined portion 140 located between the portion 130 and the portion 130.
　本体部１１０の外径は、中央部１１３から両端部（前端部（他端部）１１１及び後端部（一端部）１１２）に向かうに連れて縮径しており、中央部１１３の外径は両端部（前端部（他端部）１１１及び後端部（一端部）１１２）の外径よりも大きい。つまり、軸線Ｏ１に沿って本体部１１０を切った場合には、本体部１１０の外周面の断面形状は、緩やかな曲線を描き、外側に向けて突出する円弧状となっている。よって、本体部１１０の外形は、中央部１１３が径方向外側に膨らんだ樽形状（バレル形状）となっている。また、本体部１１０の板厚は、両端部（前端部（他端部）１１１及び後端部（一端部）１１２）から中央部１１３に向うにしたがい薄くなっており、中央部１１３の板厚は、両端部（前端部（他端部）１１１及び後端部（一端部）１１２）の板厚よりも薄く形成されている。 The outer diameter of the main body portion 110 is reduced from the central portion 113 toward both ends (front end portion (other end portion) 111 and rear end portion (one end portion) 112). Is larger than the outer diameter of both ends (front end (other end) 111 and rear end (one end) 112). That is, when the main body 110 is cut along the axis O1, the cross-sectional shape of the outer peripheral surface of the main body 110 is an arc shape that draws a gentle curve and projects outward. Therefore, the outer shape of the main body 110 has a barrel shape in which the central portion 113 bulges outward in the radial direction. In addition, the plate thickness of the main body part 110 becomes thinner from both end parts (front end part (other end part) 111 and rear end part (one end part) 112) toward the central part 113. Is formed thinner than the plate thickness of both end portions (front end portion (other end portion) 111 and rear end portion (one end portion) 112).
　第一接続部１２０の内周面は、スタブヨーク３の多角形状の接続部５に倣った多角形状を呈している。第二接続部１３０の内周面も、スタブシャフト４の多角形状の接続部６に倣った多角形状を呈している。 The inner peripheral surface of the first connecting portion 120 has a polygonal shape following the polygonal connecting portion 5 of the stub yoke 3. The inner peripheral surface of the second connecting portion 130 also has a polygonal shape following the polygonal connecting portion 6 of the stub shaft 4.
　傾斜部１４０の外径は、本体部１１０側から第二接続部１３０側に向かうにしたがい次第に縮径し、円錐台形状となっている。傾斜部１４０の板厚は、第二接続部１３０側（後側）の端部から本体部１１０側（前側）の端部に向かうに連れて漸次薄くなっている。このため、傾斜部１４０のうち前端部の板厚が最も薄く、脆弱部を構成している。以上から、動力伝達軸１に車両が前方から衝突されて衝突荷重が入力すると、軸線Ｏ１に対して傾斜する傾斜部１４０にせん断力が作用する。そして、傾斜部１４０に作用するせん断力が所定値を超えると、傾斜部１４０の前端部（脆弱部）が破損する。このため、車両衝突時、車体の前部に搭載されたエンジンや変速機は速やかに後退し、衝突エネルギーは車体の前部により吸収される。 The outer diameter of the inclined portion 140 gradually decreases from the main body 110 side toward the second connecting portion 130 side, and has a truncated cone shape. The plate thickness of the inclined portion 140 gradually decreases from the end portion on the second connection portion 130 side (rear side) toward the end portion on the main body 110 side (front side). For this reason, the plate thickness of the front end portion of the inclined portion 140 is the thinnest and constitutes a weak portion. From the above, when the vehicle collides with the power transmission shaft 1 from the front and a collision load is input, a shearing force acts on the inclined portion 140 inclined with respect to the axis O1. When the shearing force acting on the inclined portion 140 exceeds a predetermined value, the front end portion (fragile portion) of the inclined portion 140 is damaged. Therefore, at the time of a vehicle collision, the engine and the transmission mounted on the front portion of the vehicle body quickly move backward, and the collision energy is absorbed by the front portion of the vehicle body.
　スタブヨーク３は、カルダンジョイントを構成する金属製の部材である。スタブヨーク３の接続部５は、後端側が開口した筒形状を呈している。接続部５の外周面は、軸線Ｏ１方向視で多角形状を呈している。 The stub yoke 3 is a metal member that constitutes a cardan joint. The connecting portion 5 of the stub yoke 3 has a tubular shape with an opening on the rear end side. The outer peripheral surface of the connecting portion 5 has a polygonal shape when viewed in the direction of the axis O1.
　スタブシャフト４は、等速ジョイントを構成する金属製の部材である。スタブシャフト４は、等速ジョイントの動力伝達部材に一体に回転するように連結する連結部７と、連結部７の前端に形成され、後記するように閉塞部８に押し込まれることで管体２の第二接続部１３０の内側に接続する接続部６と、を備えている。接続部６の外周面は、軸線Ｏ１方向視で多角形状を呈している。 The stub shaft 4 is a metal member that constitutes a constant velocity joint. The stub shaft 4 is formed at the front end of the connecting portion 7 and the connecting portion 7 that is connected to the power transmission member of the constant velocity joint so as to rotate integrally, and is pushed into the closing portion 8 to be described later, so that the tubular body 2 And the connecting portion 6 connected to the inside of the second connecting portion 130. The outer peripheral surface of the connecting portion 6 has a polygonal shape when viewed in the direction of the axis O1.
　以下、本発明に係る製造方法を、管体２とスタブシャフト４との接続構造に適用した場合について説明する。
　［第一実施形態］
　第一実施形態は、管体２が熱硬化性樹脂を含む場合の製造方法に関する。第一実施形態の製造方法は、図５のフローチャートに示すように、端部に閉塞部８が形成された管体２を準備する準備工程（ステップＳ１）と、軟化状態の閉塞部８にスタブシャフト４を押し込む押込工程（ステップＳ２）と、閉塞部８を硬化させる硬化工程（ステップＳ３）と、を備えている。 Hereinafter, the case where the manufacturing method according to the present invention is applied to the connection structure between the tubular body 2 and the stub shaft 4 will be described.
[First embodiment]
The first embodiment relates to a manufacturing method when the tubular body 2 contains a thermosetting resin. As shown in the flowchart of FIG. 5, the manufacturing method of the first embodiment includes a preparation step (step S1) of preparing the tubular body 2 having the closed portion 8 formed at the end thereof, and a stub on the closed portion 8 in the softened state. A pushing step of pushing in the shaft 4 (step S2) and a hardening step of hardening the closed portion 8 (step S3) are provided.
　（準備工程）
　図２に示すように、管体２の第二接続部１３０の後端部は、開口することなく、管体２の内部を閉塞するように、後方に対向した閉塞部８が周面部から一体に形成されている。閉塞部８は平面状でもよいし曲面状でもよい。準備工程では、少なくともこの閉塞部８が熱硬化前の軟化状態として、管体２を準備する。 (Preparation process)
As shown in FIG. 2, the rear end portion of the second connecting portion 130 of the tubular body 2 has a rearward facing closing portion 8 integrated from the peripheral surface portion so as to close the inside of the tubular body 2 without opening. Is formed in. The closing portion 8 may be flat or curved. In the preparation step, the tubular body 2 is prepared with at least the closed portion 8 in a softened state before thermosetting.
　（押込工程）
　準備工程の後、図３に示すように、押込工程では、スタブシャフト４の接続部６を軟化状態の閉塞部８に軸線Ｏ１に沿って前方に押し込む。これにより、閉塞部８が塑性変形し、閉塞部８には、接続部６の外形に倣った凹部９が形成される。凹部９は、その底部が接続部６の前端面に密着するとともに、その内周部が接続部６の多角形状部に密着した多角形状を呈する。なお、閉塞部８の変形に伴って第二接続部１３０の周面部が変形しないように、押込工程においては、第二接続部１３０の外周に環状の押え治具１０をあてがってもよい。 (Indentation process)
After the preparation step, as shown in FIG. 3, in the pushing step, the connecting portion 6 of the stub shaft 4 is pushed forward along the axis O1 into the closed portion 8 in the softened state. As a result, the closed portion 8 is plastically deformed, and the closed portion 8 is formed with a recess 9 that follows the outer shape of the connection portion 6. The concave portion 9 has a polygonal shape in which the bottom portion is in close contact with the front end surface of the connecting portion 6 and the inner peripheral portion is in close contact with the polygonal portion of the connecting portion 6. In addition, in order to prevent the peripheral surface portion of the second connecting portion 130 from being deformed due to the deformation of the closing portion 8, the annular pressing jig 10 may be applied to the outer periphery of the second connecting portion 130 in the pushing step.
　（硬化工程）
　押込工程の後、図４に示すように、硬化工程では閉塞部８を図示しない加熱手段により熱硬化させる。閉塞部８が硬化することにより、凹部９が接続部６の表面に強固に密着し、管体２とスタブシャフト４とが接続される。加熱手段としては、管２およびスタブシャフト４を加熱炉に設置するようにしてもよいし、前記押え治具１０に加熱装置を内蔵させ、この加熱装置で閉塞部８を加熱するようにしてもよい。 (Curing process)
After the pushing step, as shown in FIG. 4, in the hardening step, the closed portion 8 is thermoset by a heating means (not shown). When the blocking portion 8 is hardened, the concave portion 9 firmly adheres to the surface of the connecting portion 6, and the tubular body 2 and the stub shaft 4 are connected. As the heating means, the tube 2 and the stub shaft 4 may be installed in a heating furnace, or a heating device may be built in the holding jig 10 and the closing part 8 may be heated by this heating device. Good.
　以上のように、繊維強化プラスチック製の管体２と、管体２の端部に接続する連結部材（スタブシャフト４）と、を備える動力伝達軸１に関して、前記した準備工程と押込工程と硬化工程とを備える製造方法とすれば、精度の高いセレーション加工が不要となり、管体２の変形および硬化を利用して管体２と連結部材とを簡単に接続でき、製造コストの低減を図れる。接着剤も不要となり、作業工程が簡略化される。管体２は、閉塞部８により端部が塞がれているので、管体２の内部への水や塵埃等の浸入のおそれもない。 As described above, regarding the power transmission shaft 1 including the tubular body 2 made of fiber reinforced plastic and the connecting member (stub shaft 4) connected to the end portion of the tubular body 2, the above-described preparation step, pushing step, and curing According to the manufacturing method including the steps, highly accurate serration processing is not required, the tube 2 and the connecting member can be easily connected by utilizing the deformation and hardening of the tube 2, and the manufacturing cost can be reduced. No adhesive is required, and the work process is simplified. Since the end of the tubular body 2 is closed by the closing portion 8, there is no possibility that water, dust or the like will enter the inside of the tubular body 2.
　また、管体２と連結部材（スタブシャフト４）との接続部として多角形状に形成したことにより、管体２とスタブシャフト４との間での回転の動力伝達性能が向上する。 Also, by forming a polygonal shape as a connecting portion between the pipe body 2 and the connecting member (stub shaft 4), the power transmission performance of rotation between the pipe body 2 and the stub shaft 4 is improved.
　さらに、本実施形態では、管体２が、中央部１１３から両端部（前端部（他端部）１１１、後端部（一端部）１１２）に向かうに連れて外径が縮径する本体部１１０を備える。これによれば、曲げ応力が集中し易い管体２の本体部１１０に樽形状部が形成され、所定の曲げ強度を有することとなる。一方で、曲げ応力が集中し難い本体部１１０の両端部（前端部（他端部）１１１及び後端部（一端部）１１２）は、外径が小径に形成されることで軽量化されている。本体部１１０の中央部１１３においても、板厚が薄くなっていることで軽量化されている。よって、動力伝達軸１は、中央部１１３の所定の曲げ剛性を確保しつつ軽量化がなされ、危険回転数が上昇する。 Further, in the present embodiment, the outer diameter of the tubular body 2 is reduced from the central portion 113 toward both ends (front end (other end) 111, rear end (one end) 112). 110 is provided. According to this, the barrel-shaped portion is formed in the main body portion 110 of the tubular body 2 in which bending stress is likely to concentrate, and has a predetermined bending strength. On the other hand, both end portions (front end portion (other end portion) 111 and rear end portion (one end portion) 112) of the main body portion 110 in which bending stress is hard to concentrate are lightened by forming the outer diameters to be small. There is. Also in the central portion 113 of the main body 110, the weight is reduced due to the thin plate thickness. Therefore, the power transmission shaft 1 is reduced in weight while ensuring a predetermined bending rigidity of the central portion 113, and the dangerous rotational speed is increased.
　［第二実施形態］
　第二実施形態は、管体２が熱可塑性樹脂を含む場合の製造方法に関する。第二実施形態の製造方法も、端部に閉塞部８が形成された管体２を準備する準備工程と、軟化状態の閉塞部８にスタブシャフト４を押し込む押込工程と、閉塞部８を硬化させる硬化工程と、を備えている。 [Second embodiment]
The second embodiment relates to a manufacturing method when the tubular body 2 contains a thermoplastic resin. Also in the manufacturing method of the second embodiment, a preparatory step of preparing the tubular body 2 having the closed portion 8 formed at the end, a pushing step of pushing the stub shaft 4 into the softened closed portion 8, and a hardening of the closed portion 8. And a curing step.
　（準備工程）
　図６に示すように、管体２の第二接続部１３０の後端部は、開口することなく、管体２の内部を閉塞するように、後方に対向した閉塞部８が周面部から一体に形成されている。第二実施形態の準備工程では、閉塞部８を加熱して軟化させる加熱工程を備える。加熱手段としては、例えば第二接続部１３０の外周にあてがう環状の加熱装置１１とする。 (Preparation process)
As shown in FIG. 6, the rear end portion of the second connecting portion 130 of the tubular body 2 is integrally formed with the closing portion 8 facing rearward so as to close the inside of the tubular body 2 without opening. Is formed in. The preparation step of the second embodiment includes a heating step of heating the closed portion 8 to soften it. As the heating means, for example, an annular heating device 11 applied to the outer periphery of the second connecting portion 130 is used.
　（押込工程）
　準備工程の後、図７に示すように、押込工程では、スタブシャフト４の接続部６を軟化状態の閉塞部８に軸線Ｏ１に沿って前方に押し込む。これにより、閉塞部８が塑性変形し、閉塞部８には、接続部６の外形に倣った凹部９が形成される。凹部９は、その底部が接続部６の前端面に密着するとともに、その内周部が接続部６の多角形状部に密着した多角形状を呈する。 (Indentation process)
After the preparation step, as shown in FIG. 7, in the pushing step, the connecting portion 6 of the stub shaft 4 is pushed forward along the axis O1 into the closed portion 8 in the softened state. As a result, the closed portion 8 is plastically deformed, and the closed portion 8 is formed with a recess 9 that follows the outer shape of the connection portion 6. The concave portion 9 has a polygonal shape in which the bottom portion is in close contact with the front end surface of the connecting portion 6 and the inner peripheral portion is in close contact with the polygonal portion of the connecting portion 6.
　（硬化工程）
　押込工程の後、図８に示すように、硬化工程では閉塞部８を自然冷却等により冷却硬化させる。閉塞部８が硬化することにより、凹部９が接続部６の表面に強固に密着し、管体２とスタブシャフト４とが接続される。 (Curing process)
After the pushing step, as shown in FIG. 8, in the hardening step, the closed portion 8 is cooled and hardened by natural cooling or the like. When the blocking portion 8 is hardened, the concave portion 9 firmly adheres to the surface of the connecting portion 6, and the tubular body 2 and the stub shaft 4 are connected.
　第二実施形態の製造方法によっても、複雑なセレーション加工が不要となり、管体２の変形および硬化を利用して管体２と連結部材とを簡単に接続できる。接着剤も不要となり、作業工程が簡略化される。管体２は、閉塞部８により端部が塞がれているので、管体２の内部への水や塵埃等の浸入が無い。 Even by the manufacturing method of the second embodiment, complicated serration processing is unnecessary, and the deformation and hardening of the pipe body 2 can be used to easily connect the pipe body 2 and the connecting member. No adhesive is required, and the work process is simplified. Since the end portion of the tube body 2 is closed by the closing portion 8, water and dust do not enter the inside of the tube body 2.
　［第三実施形態］
　第三実施形態の動力伝達軸の製造方法も、第一実施形態と同様に、端部に閉塞部８が形成された管体２を準備する準備工程と、軟化状態の閉塞部８にスタブシャフト４を押し込む押込工程と、閉塞部８を硬化させる硬化工程と、を備えている。図９に示すように、第三実施形態の動力伝達軸１０１は、管体２が、一端部（後端部１１２）から他端部（前端部１１１）まで外径が均一に形成された本体部１１０を備えている。 [Third embodiment]
Similarly to the first embodiment, the method for manufacturing the power transmission shaft according to the third embodiment also includes a preparatory step of preparing the tubular body 2 having the closed portion 8 formed at the end, and a stub shaft for the closed portion 8 in the softened state. A pushing step of pushing in 4 and a hardening step of hardening the closed portion 8 are provided. As shown in FIG. 9, the power transmission shaft 101 of the third embodiment is a main body in which the tubular body 2 has a uniform outer diameter from one end (rear end 112) to the other end (front end 111). The unit 110 is provided.
　管体２の本体部１１０の外径を均一にすることにより、管体２の形状を簡素化でき、成型コストの低減を図れる。 By making the outer diameter of the main body 110 of the tubular body 2 uniform, the shape of the tubular body 2 can be simplified and the molding cost can be reduced.
　［第四実施形態］
　第四実施形態の動力伝達軸の製造方法も、第一実施形態と同様に、端部に閉塞部８が形成された管体２を準備する準備工程と、軟化状態の閉塞部８にスタブシャフト４を押し込む押込工程と、閉塞部８を硬化させる硬化工程と、を備えている。図１０に示すように、第四実施形態の動力伝達軸２０１は、管体２が、中央部１１３から前端部（他端部）１１１まで外径が均一に形成され、中央部１１３から後端部（一端部）１１２に向かうに連れて外径が縮径し、外周面が軸線Ｏ１方向に曲線状に形成された本体部１１０を備えている。 [Fourth Embodiment]
Similarly to the first embodiment, the method for manufacturing the power transmission shaft according to the fourth embodiment also includes a preparation step of preparing the tubular body 2 having the closed portion 8 formed at the end, and a stub shaft for the closed portion 8 in the softened state. A pushing step of pushing in 4 and a hardening step of hardening the closed portion 8 are provided. As shown in FIG. 10, in the power transmission shaft 201 of the fourth embodiment, the tubular body 2 has a uniform outer diameter from the central portion 113 to the front end portion (the other end portion) 111, and from the central portion 113 to the rear end. An outer diameter is reduced toward the portion (one end portion) 112, and a main body portion 110 having an outer peripheral surface formed in a curved shape in the direction of the axis O1 is provided.
　このような本体部１１０を備えることにより、管体２の形状の簡素化と強度の向上との両立を図れる。 By providing such a main body 110, both simplification of the shape of the tubular body 2 and improvement of strength can be achieved.
　以上、好適な実施形態を説明した。各実施形態では、管体２とスタブシャフト４との接続に本発明の製造方法を適用したが、本発明は、管体２とスタブヨーク３との接続においても適用可能である。 The preferred embodiment has been described above. In each of the embodiments, the manufacturing method of the present invention is applied to the connection between the pipe body 2 and the stub shaft 4, but the present invention is also applicable to the connection between the pipe body 2 and the stub yoke 3.
　１，１０１，２０１　動力伝達軸
　２　　管体
　３　　スタブヨーク（連結部材）
　４　　スタブシャフト（連結部材）
　８　　閉塞部
　９　　凹部 1, 101, 201 Power transmission shaft 2 Tubular body 3 Stub yoke (connecting member)
4 Stub shaft (connecting member)
8 Closure 9 Recess

Claims (6)

  1. 　少なくとも一端が閉塞された閉塞部を有する繊維強化プラスチック製の管体と、前記管体の端部に接続する連結部材と、を備える動力伝達軸の製造方法であって、
    　前記管体を準備する準備工程と、
    　前記準備工程の後に、前記閉塞部に前記連結部材を押し込む押込工程と、
    　前記押込工程の後に、前記閉塞部を硬化させる硬化工程と、
    　を備えることを特徴とする動力伝達軸の製造方法。     A method for manufacturing a power transmission shaft, comprising: a tube body made of fiber reinforced plastic having a closed portion at least one end of which is closed; and a connecting member connected to an end portion of the tube body,
    A preparatory step of preparing the tubular body,
    After the preparation step, a pushing step of pushing the connecting member into the closed portion,
    A curing step of curing the closed portion after the pushing step,
    A method for manufacturing a power transmission shaft, comprising:
  2. 　前記管体は熱可塑性樹脂を含み、
    　前記準備工程において、前記閉塞部を加熱する加熱工程を備えることを特徴とする請求項１に記載の動力伝達軸の製造方法。     The tubular body contains a thermoplastic resin,
    The method for manufacturing a power transmission shaft according to claim 1, further comprising a heating step of heating the closed portion in the preparing step.
  3. 　前記管体と前記連結部材との接続部は多角形状に形成されていることを特徴とする請求項１または請求項２に記載の動力伝達軸の製造方法。 The method for manufacturing a power transmission shaft according to claim 1 or 2, wherein a connecting portion between the pipe body and the connecting member is formed in a polygonal shape.
  4. 　前記管体は、中央部から両端部に向かうに連れて外径が縮径し、外周面が前記両端部の一端部から他端部にかけて軸線方向に円弧状に形成された本体部を備えることを特徴とする請求項１から請求項３のいずれか一項に記載の動力伝達軸の製造方法。 The tubular body includes a main body portion whose outer diameter is reduced from the central portion toward both ends, and the outer peripheral surface is formed in an arcuate shape in the axial direction from one end portion to the other end portion of the both end portions. The method for manufacturing a power transmission shaft according to any one of claims 1 to 3, wherein:
  5. 　前記管体は、一端部から他端部まで外径が均一に形成された本体部を備えることを特徴とする請求項１から請求項３のいずれか一項に記載の動力伝達軸の製造方法。 The method for manufacturing a power transmission shaft according to claim 1, wherein the tubular body includes a main body portion having a uniform outer diameter from one end to the other end. ..
  6. 　前記管体は、中央部から他端部まで外径が均一に形成され、前記中央部から一端部に向かうに連れて外径が縮径し、外周面が軸線方向に曲線状に形成された本体部を備えることを特徴とする請求項１から請求項３のいずれか一項に記載の動力伝達軸の製造方法。 The tubular body has a uniform outer diameter from the central portion to the other end, the outer diameter is reduced from the central portion to the one end, and the outer peripheral surface is formed in a curved shape in the axial direction. The method for manufacturing a power transmission shaft according to claim 1, further comprising a main body portion.
PCT/JP2019/010053 2019-02-27 2019-03-12 Method for manufacturing power transmission shaft WO2020174698A1 (en)

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KR102417644B1 (en) * 2020-06-05 2022-07-05 김병국 coupling using carbon fiber and manufacturing method thereof

Citations (6)

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JPS61175306A (en) * 1985-01-28 1986-08-07 ソシエテ・ナシヨナル・アンダストリエル・アエロスパテイアル Method of connecting element to end section of pipe
JPH03254926A (en) * 1990-01-31 1991-11-13 Sumitomo Chem Co Ltd Driving force transmission shaft made of fiber-reinforced resin
JPH09229048A (en) * 1996-02-27 1997-09-02 Suzuki Motor Corp Power transmitting shaft
JP2010242817A (en) * 2009-04-02 2010-10-28 Aisin Keikinzoku Co Ltd Integrally molded propeller shaft
JP2016502478A (en) * 2012-11-08 2016-01-28 デーナ、オータモウティヴ、システィムズ、グループ、エルエルシー Hydroformed driveshaft tube with secondary shape
JP2018159404A (en) * 2017-03-22 2018-10-11 Ntn株式会社 Hollow power transmission shaft, external joint member for constant velocity universal joint and drive shaft

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61175306A (en) * 1985-01-28 1986-08-07 ソシエテ・ナシヨナル・アンダストリエル・アエロスパテイアル Method of connecting element to end section of pipe
JPH03254926A (en) * 1990-01-31 1991-11-13 Sumitomo Chem Co Ltd Driving force transmission shaft made of fiber-reinforced resin
JPH09229048A (en) * 1996-02-27 1997-09-02 Suzuki Motor Corp Power transmitting shaft
JP2010242817A (en) * 2009-04-02 2010-10-28 Aisin Keikinzoku Co Ltd Integrally molded propeller shaft
JP2016502478A (en) * 2012-11-08 2016-01-28 デーナ、オータモウティヴ、システィムズ、グループ、エルエルシー Hydroformed driveshaft tube with secondary shape
JP2018159404A (en) * 2017-03-22 2018-10-11 Ntn株式会社 Hollow power transmission shaft, external joint member for constant velocity universal joint and drive shaft

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