WO2020174699A1 - Motive power transmission shaft and production method for motive power transmission shaft - Google Patents

Motive power transmission shaft and production method for motive power transmission shaft Download PDF

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Publication number
WO2020174699A1
WO2020174699A1 PCT/JP2019/010056 JP2019010056W WO2020174699A1 WO 2020174699 A1 WO2020174699 A1 WO 2020174699A1 JP 2019010056 W JP2019010056 W JP 2019010056W WO 2020174699 A1 WO2020174699 A1 WO 2020174699A1
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WO
WIPO (PCT)
Prior art keywords
peripheral surface
power transmission
transmission shaft
insertion portion
outer peripheral
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PCT/JP2019/010056
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French (fr)
Japanese (ja)
Inventor
貴博 中山
一希 大田
森　健一
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株式会社ショーワ
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Publication of WO2020174699A1 publication Critical patent/WO2020174699A1/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

Definitions

  • the present invention relates to a power transmission shaft and a method for manufacturing the power transmission shaft.
  • a power transmission shaft (propeller shaft) mounted on the vehicle 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 transmission.
  • a power transmission shaft includes a tubular body and a universal joint connected to an end portion of the tubular body, and in recent years, a tubular body made of fiber reinforced plastic has been developed.
  • the joint between the tubular body made of fiber reinforced plastic and the universal joint made of metal is formed by forming an insertion portion at the end of the connecting member (stub yoke or stub shaft) of the universal joint, and connecting this insertion portion to the connection portion (pipe (The end of the). Further, the insertion portion is formed to have a smaller diameter than the connection portion, and the adhesive applied to the outer peripheral surface of the insertion portion adheres to the connection portion, whereby the tube body and the connecting member are integrated (see Patent Document below). 1 and 2).
  • the insertion portion when the insertion portion is inserted into the connection portion, the insertion portion may be tilted with respect to the connection portion, and the axis of the tubular body and the connecting member may not match.
  • a method of increasing the length of the insertion portion to suppress the inclination of the insertion portion can be considered, but this increases the cost and the weight of the power transmission shaft.
  • An object of the present invention is to provide a power transmission shaft and a method for manufacturing the power transmission shaft.
  • a power transmission shaft includes a tubular body made of fiber reinforced plastic and a connecting member connected to an end of the tubular body, and transmits power by rotating.
  • the power transmission shaft wherein the tubular body has a connecting portion at an end into which the connecting member is inserted, and the connecting member has an inserting portion inserted into the connecting portion and an outer periphery of the inserting portion.
  • a plurality of projecting portions that protrude in the radial direction from the surface and are spaced apart from each other in the circumferential direction and contact the inner circumferential surface of the connecting portion; and the inner circumferential surface of the connecting portion that is arranged between the plurality of projecting portions.
  • a plurality of adhesive layers for adhering the outer peripheral surface of the insertion portion to each other.
  • a method for manufacturing a power transmission shaft comprises a pipe body made of fiber reinforced plastic and a connecting member connected to an end portion of the pipe body, and a power transmitting power by rotating.
  • a method for manufacturing a transmission shaft comprising: a tubular body having a connecting portion at an end into which the connecting member is inserted; an inserting portion inserted into the connecting portion; and a radial direction protruding from an outer peripheral surface of the inserting portion.
  • a connecting member that is spaced apart from each other in the circumferential direction and that includes a plurality of protruding portions that come into contact with the inner peripheral surface of the connecting portion; and a connecting step between the plurality of protruding portions.
  • the insertion portion when the insertion portion is inserted into the connection portion, the plurality of protrusions come into contact with the inner peripheral surface of the connection portion, and the insertion portion is positioned. Therefore, the inclination of the insertion portion with respect to the connection portion is avoided, and the concentricity between the tubular body and the connecting member is improved.
  • FIG. 4 is a sectional view taken along the line IV-IV of FIG. 3. It is the side view which extracted the stub yoke (coupling member) of 1st embodiment, and carried out side view. It is a flow chart which shows a manufacturing process of a power transmission shaft of a first embodiment. It is a side view which shows the preparation process of the manufacturing method of the power transmission shaft of 1st embodiment.
  • the power transmission shaft 1 is a propeller shaft mounted on an FF (Front-engine Front-drive)-based four-wheel drive vehicle.
  • the power transmission shaft 1 extends in the front-rear direction of the vehicle, and rotates about an axis O1 to drive power from a transmission mounted in the front part of the vehicle body to a final reduction gear installed in the rear part of the vehicle body ( Torque) is transmitted.
  • the power transmission shaft 1 includes a tube body 2 made of carbon fiber reinforced plastic (CFRP), a stub yoke (connecting member) 3 connected to the front side of the tube body 2, and a stub shaft (connected to the rear side of the tube body 2). Connection member) 4.
  • the tubular body 2 is formed by laminating a fiber layer made of fibers wound around the axis O1 and a fiber layer made of fibers extending in the direction of the axis O1. Therefore, the tubular body 2 has high mechanical strength and high elasticity in the direction of the axis O1.
  • the reinforcing fibers used for the fiber-reinforced plastic in the tubular body 2 of the present invention are not limited to carbon fibers, and may be glass fibers or aramid fibers.
  • the tube body 2 includes a main body portion 10, a first connecting portion 20 arranged on the front side of the main body portion 10, a second connecting portion 30 arranged on the rear side of the main body portion 10, a main body portion 10, and a second connection.
  • An inclined portion 40 located between the portion 30 and the portion 30.
  • the shape of the power transmission shaft 1 is exaggerated for easy understanding of the shape of the power transmission shaft 1.
  • the first connecting portion 20 is continuous with the front end portion 11 of the main body portion 10
  • the inclined portion 40 is continuous with the rear end portion 12 of the main body portion 10.
  • the outer peripheral surface 14 and the inner peripheral surface 15 of the main body portion 10 have a circular sectional shape.
  • the outer diameter of the main body portion 10 is reduced from the central portion 13 toward both end portions (the front end portion 11 and the rear end portion 12), and the outer diameter R1 of the central portion 13 is equal to both end portions (the front end portion 11 and the rear end portion 11). And larger than the outer diameter R2 of the rear end portion 12). That is, when the main body 10 is cut along the axis O1, the cross-sectional shape of the outer peripheral surface 14 and the cross-sectional shape of the inner peripheral surface 15 of the main body 10 draw a gentle curve, and the central portion 13 projects outward. It has an arc shape. Therefore, the outer shape of the main body portion 10 has a barrel shape (barrel shape) in which the central portion 13 bulges outward in the radial direction.
  • the inner diameter of the main body portion 10 is also reduced from the central portion 13 of the main body portion 10 toward both end portions (the front end portion 11 and the rear end portion 12). Further, in the cross-sectional shape, the plate thickness of the main body portion 10 becomes thinner from both end portions (the front end portion 11 and the rear end portion 12) toward the central portion 13, and the plate thickness T1 of the central portion 13 is It is thinner than the plate thickness T2 at both ends (front end 11 and rear end 12).
  • the outer diameter of the inclined portion 40 gradually decreases from the main body portion 10 toward the second connection portion 30, and has a truncated cone shape.
  • the plate thickness of the inclined portion 40 gradually decreases from the end portion on the second connection portion 30 side (rear side) toward the end portion on the main body portion 10 side (front side). For this reason, the plate thickness of the front end portion of the inclined portion 40 is the thinnest, and constitutes the fragile portion. Therefore, when the vehicle collides from the front and a collision load is input to the power transmission shaft 1, a shearing force acts on the inclined portion 40 that inclines with respect to the axis O1.
  • the inclined portion 40 may have a plate thickness that gradually decreases from the end portion on the main body portion 10 side (front side) toward the end portion on the second connection portion 30 side (rear side). According to this, the plate thickness of the rear end portion of the inclined portion is thinnest, and the rear end portion of the inclined portion 40 constitutes the fragile portion.
  • it may be the inclined portion 40 in which the fragile portion is formed by providing a concave portion on the outer peripheral surface or the inner peripheral surface and changing the plate thickness of a partial section.
  • an insertion portion 7 of the stub yoke 3, which will be described later, is inserted into the first connecting portion 20.
  • the insertion portion 4a of the stub shaft 4 of the constant velocity joint is inserted into the second connection portion 30.
  • the joint structure between the first connecting portion 20 and the stub yoke 3 and the joint structure between the second connecting portion 30 and the stub shaft 4 are the same structure.
  • the joint structure between the first connecting portion 20 and the stub yoke 3 will be described, and the joint structure between the second connecting portion 30 and the stub shaft 4 will be omitted.
  • the stub yoke 3 is a metal member that constitutes a cardan joint.
  • the stub yoke 3 includes a disk-shaped base portion 5 centered on the axis O1, a pair of arm portions 6 extending forward from the base portion 5 and supporting the cross shaft, and extending rearward from the base portion 5 and inserted into the first connecting portion 20. And an insertion portion 7 to be inserted.
  • the insertion portion 7 is formed in a tubular shape whose rear end side is open. As shown in FIG. 4, the outer peripheral surface 7a of the insertion portion 7 is formed in a circular shape centered on the axis O1, and the outer peripheral surface 7a has a radius r1. Further, the inner peripheral surface 20a of the first connecting portion 20 is formed in a circular shape centered on the axis O1, and the radius of the inner peripheral surface 20a is r2. Therefore, the outer peripheral surface 7a of the insertion portion 7 has a radius smaller than that of the inner peripheral surface 20a of the first connection portion 20 by r3.
  • the outer peripheral surface 7a of the insertion portion 7 is provided with a protruding portion 8 and an adhesive layer 9 that adheres the outer peripheral surface 7a of the insertion portion 7 and the inner peripheral surface 20a of the first connecting portion 20.
  • the protruding portion 8 is a plate-shaped resin component having an arc shape in a sectional view, and is bonded to the outer peripheral surface 7 a of the insertion portion 7.
  • Six protrusions 8 are provided and are arranged at equal intervals in the circumferential direction.
  • the thickness of the protruding portion 8 is r3, and the outer surface 8a of the protruding portion 8 is in contact with the inner peripheral surface 20a of the first connecting portion 20.
  • the projecting portion 8 extends in the front-rear direction. Therefore, the front end (one end) to the rear end (other end) of the outer surface 8a of the protruding portion 8 is in contact with the inner peripheral surface 20a of the first connecting portion 20 (see FIG. 3). Further, by disposing the plurality of protrusions 8 described above, between the protrusions 8 on the outer peripheral side of the insertion portion 7 and between the protrusions 8, concave portions that are recessed radially inward from the outer surface 8a of the protrusions 8. 9a is formed. The recess 9a extends in the front-rear direction, and the rear portion of the recess 9a is open rearward.
  • the adhesive layer 9 is an adhesive that is applied and hardened in the recess 9 a, and the lower portion is bonded to the outer peripheral surface 7 a of the insertion portion 7, and the upper portion is the inner peripheral surface of the first connection portion 20. It is bonded to 20a.
  • the thickness of the adhesive layer 9 is the same as the depth of the recess 9a, in other words, the same as the thickness r3 of the protrusion 8.
  • the method for manufacturing the power transmission shaft 1 includes a preparatory step (step S1) of preparing a tubular body 2 made of fiber reinforced plastic and a stub yoke (coupling member) 3 made of metal, and an adhesive 9b.
  • a coating step (step S2) for coating and an insertion step (step S3) for inserting the stub yoke (connecting member) 3 into the tubular body 2 are provided.
  • the tubular body 2 (see FIG. 1) including the main body portion 10, the first connecting portion 20, the second connecting portion 30, and the inclined portion 40 is prepared. Further, a stub yoke 3 having a base 5, a pair of arms 6 and an insertion portion 7, and a plurality of protrusions 8 are prepared. Then, as shown in FIG. 7, a plurality of protrusions 8 are fixed to the outer peripheral surface 7a of the insertion portion 7 of the stub yoke 3 with an adhesive.
  • the protrusions 8 are arranged so as to extend in the front-rear direction with respect to the outer peripheral surface 7a of the insertion portion 7, and are arranged so as to be separated from the protrusions 8 adjacent in the circumferential direction by a predetermined distance.
  • the adhesive 9b is applied in the recess 9a.
  • the amount of the adhesive 9b applied is such that the adhesive 9b protrudes outward in the radial direction with respect to the outer surface 8a of the protruding portion 8, in other words, the thickness of the adhesive 9b exceeds r3.
  • the stub yoke 3 is arranged in front of the first connecting portion 20, and the inserting portion 7 is inserted into the front opening of the first connecting portion 20.
  • the insertion portion 7 is moved to the first side while contacting (sliding) the outer surface 8a of the protruding portion 8 with the inner peripheral surface 20a of the first connection portion 20. Push it further into one connection part 20.
  • the adhesive 9b is cured to form the adhesive layer 9 that adheres the insertion portion 7 and the first connection portion 20.
  • the adhesive 9b is applied in a larger amount than the volume of the recess 9a, the rear portion of the recess 9a is open. Therefore, the excess adhesive 9b is moved backward from the rear of the recess 9a. It flows out (see the arrow in FIG. 9). Therefore, the adhesive 9b is less likely to flow between the outer surface 8a of the protruding portion 8 and the inner peripheral surface 20a of the first connecting portion 20.
  • each protruding portion 8 abuts the inner peripheral surface 20a of the first connecting portion 20, the insertion portion 7 is positioned, and the shaft of the insertion portion 7 is positioned.
  • the core and the axial center of the first connecting portion 20 coincide with each other.
  • the outer surface 8a of each projecting portion 8 is in contact with the first connecting portion 20 from the front end to the rear end, the axis of the insertion portion 7 is inclined with respect to the axis of the first connecting portion 20. It is supposed not to. From the above, the concentricity between the tubular body 2 and the stub yoke 3 is improved. Further, since the concentricity between the tubular body 2 and the stub yoke 3 is improved, the thickness of each adhesive layer 9 is also uniform, and the adhesive strength can be made uniform.
  • the central portion 13 of the main body 10 in which bending stress is easily concentrated has an outer diameter R1 formed to be large, and has a predetermined bending strength.
  • both ends (the front end portion 11 and the rear end portion 12) of the main body portion 110 where the bending stress is hard to concentrate are formed to have a small outer diameter R2 and are lightened.
  • the central portion 13 of the main body portion 10 has a thin plate thickness T1 and is lightweight. Therefore, in the tubular body 2 of the power transmission shaft 1, the main body portion 10 is lightened while ensuring a predetermined bending rigidity of the central portion 13, and the bending primary resonance point is improved.
  • the power transmission shaft 101 of the second embodiment includes a tube body 2, a stub yoke 3, and a stub shaft 4.
  • the stub yoke 3 includes a base portion 5, a pair of arm portions 6 and an insertion portion 7.
  • the outer peripheral surface 7 a of the insertion portion 7 is provided with a plurality of protrusions 108 and an adhesive layer 9 that adheres the outer peripheral surface 7 a of the insertion portion 7 and the first connecting portion 20.
  • description will be made focusing on the differences from the first embodiment. As shown in FIGS.
  • the protruding portion 108 of the second embodiment is composed of a pair of plate members 108a and 108b that are spaced apart from each other in the front-rear direction.
  • the front plate material 108a is bonded to the front end (one end) of the outer peripheral surface 7a of the insertion portion 7, and the rear plate material 108b is bonded to the rear end (other end) of the outer peripheral surface 7a of the insertion portion 7.
  • the front plate member 108a and the rear plate member 108b are each provided in six pieces, and are arranged at equal intervals in the circumferential direction.
  • each protruding portion 108 abuts the inner peripheral surface 20a of the first connecting portion 20 to position the insertion portion 7, and the axial center of the insertion portion 7 And the axis of the first connecting portion 20 coincide with each other.
  • the pair of plate members 108 a and 108 b that are separated from each other in the front and rear are in contact with the first connecting portion 20, the axis of the insertion portion 7 is prevented from inclining with respect to the axis of the first connecting portion 20.
  • the concentricity between the tubular body 2 and the stub yoke 3 is improved.
  • the adhesive layer 9 can be provided between the pair of plate members 108a and 108b, the adhesive strength is improved.
  • the power transmission shaft 201 includes a tubular body 202, a stub yoke 203, and the stub shaft 4.
  • the tubular body 202 includes a main body portion 10, a first connecting portion 220, a second connecting portion 30, and an inclined portion 40.
  • the stub yoke 203 includes a base portion 5, a pair of arm portions 6 and an insertion portion 207.
  • the outer peripheral surface 207a of the insertion portion 207 is provided with a plurality of protrusions 208, and an adhesive layer 209 for bonding the outer peripheral surface 207a of the insertion portion 207 and the first connecting portion 220.
  • description will be made focusing on the differences from the first embodiment.
  • the first connecting portion 220 of the tubular body 202 is formed in a polygonal (hexagonal) cross section, and the inner peripheral surface 220a of the first connecting portion 220 has six corners 221. , And six side portions 222 formed in a plane shape.
  • the insertion portion 207 of the stub yoke 203 has a polygonal (hexagonal) cross-sectional shape, and the outer peripheral surface 207a of the insertion portion 207 has six corner portions 207b and a flat shape. And two side portions 207c.
  • the projecting portion 208 is formed in a flat plate shape in a sectional view, adheres to the outer peripheral surface 207a of the insertion portion 207, and extends from the front end (one end) to the rear end (other end) of the outer peripheral surface 207a. There is. Further, the protruding portion 208 is arranged on the side portion 207c of the outer peripheral surface 207a of the insertion portion 207, and the outer surface thereof is in contact with the side portion 222 of the first connecting portion 220.
  • the adhesive layer 209 is provided between the plurality of protruding portions 208, and bonds the corner portion 207b of the outer peripheral surface 207a of the insertion portion 207 and the corner portion 221 of the inner peripheral surface 220a of the first connecting portion 220. There is.
  • each protruding portion 208 abuts the inner peripheral surface 220a of the first connecting portion 220 to position the insertion portion 207, and the axis of the insertion portion 207 and the first connection portion 220 are positioned.
  • the projecting portion 208 extending in the front-rear direction is in contact with the first connecting portion 220, the axial center of the insertion portion 207 is not inclined with respect to the axial center of the first connecting portion 220. .. From the above, the concentricity between the tubular body 202 and the stub yoke 203 is improved.
  • the outer peripheral surface 207a of the insertion portion 207 and the inner peripheral surface 220a of the first connecting portion 220 are formed in a polygonal shape, and are locked in the circumferential direction via the protruding portion 208. Therefore, the tubular body 202 and the stub yoke 203 are configured so as not to rotate relative to each other.
  • the power transmission shaft 301 of the fourth embodiment includes a tube body 302, a stub yoke 303, and the stub shaft 4.
  • the tubular body 302 includes a main body portion 10, a first connecting portion 320, a second connecting portion 30, and an inclined portion 40.
  • the stub yoke 303 includes a base portion 5, a pair of arm portions 6 and an insertion portion 307.
  • the outer peripheral surface 307a of the insertion portion 307 is provided with a plurality of protrusions 208, and an adhesive layer 209 that adheres the outer peripheral surface 207a of the insertion portion 207 and the first connection portion 220.
  • description will be made focusing on the differences from the first embodiment.
  • the projecting portion 308 is formed in a substantially L shape in a sectional view, is bonded to the outer peripheral surface 307a of the insertion portion 307, and extends from the front end (one end) to the rear end (other end) of the outer peripheral surface 307a. There is. Further, the protruding portion 308 is arranged on the corner portion 307b of the outer peripheral surface 307a of the insertion portion 307, and the outer surface thereof is in contact with the corner portion 321 of the first connecting portion 320.
  • the outer peripheral surface 307a of the insertion portion 307 and the inner peripheral surface 320a of the first connecting portion 320 are formed in a polygonal shape, and are locked in the circumferential direction via the protruding portion 308. Therefore, the tubular body 302 and the stub yoke 303 are configured so as not to rotate relative to each other.
  • the cross-sectional shape of the main body section taken along the axis O1 direction is not limited to the arc shape.
  • the cross-sectional shape of the main body section taken along the axis O1 may be stepwise.
  • the central portion bulges outward in the radial direction rather than the both end portions, but the outer diameter may be the same from one end to the other end.
  • the main body portion may have the same outer shape from one end to the central portion, and the diameter thereof may be gradually reduced from the central portion toward the other end.
  • the material of the protruding portion is described as a resin, but the present invention is not particularly limited thereto, and may be formed of a metal material, or may be formed integrally with a connecting member such as a stub yoke. Good.
  • the protruding portions of the third embodiment and the fourth embodiment extend from the front end (one end) to the rear end (the other end) of the outer peripheral surface of the insertion portion of the stub yoke, but the second embodiment It may be separated in the front and back as shown in.
  • the front end is shown as one end and the rear end is shown as the other end, but the present invention is not limited to this.
  • the front end may be the other end and the rear end may be the one end.
  • the present invention may be applied to the joint structure of the second connecting portion 30 and the stub shaft 4. ..
  • the present invention may be applied to both the joint structure of the first connecting portion 20 and the stub yoke 3 and the joint structure of the second connecting portion 30 and the stub shaft 4. Then, even when the present invention is applied to both the joint structure of the first connecting portion 20 and the stub yoke 3 and the joint structure of the second connecting portion 30 and the stub shaft 4, the first connecting portion 20 and the stub yoke 3 are also provided.
  • joining structure of the second connecting portion 30 and the stub shaft 4 may not be the same.
  • the joining structure of the first connecting portion 20 and the stub yoke 3 is applied to the first embodiment
  • the second embodiment may be applied to the joint structure of the two connection part 30 and the stub shaft 4.
  • Adhesive layer 9a Recess 9b Adhesive 10,110 Main body part 20,220,320 First connection part 30 Second connection Part 40 Inclined part 207b, 221, 307b, 321 Corner part 207c, 222, 307c, 322 Side part

Abstract

The present invention is a motive power transmission shaft (1) that transmits motive power by rotating and is formed from a fiber-reinforced plastic tube (2) and a coupling member (3) that is connected to an end part of the tube (2). The motive power transmission shaft (1) is characterized in that the end part of the tube (2) has a connection part (20) into which the coupling member (3) is inserted, and the coupling member (3) comprises an insertion part (7) that is inserted into the connection part (20), a plurality of protruding parts (8) that protrude in the radial direction from an outer circumferential surface (7a) of the insertion part (7), are separated from each other in the circumferential direction, and contact an inner circumferential surface (20a) of the connection part (20), and a plurality of adhesive layers (9) that are arranged between the plurality of protruding parts (8) and adhere the inner circumferential surface (20a) of the connection part (20) and the outer circumferential surface (7a) of the insertion part (7).

Description

動力伝達軸及び動力伝達軸の製造方法Power transmission shaft and method of manufacturing power transmission shaft
　本発明は、動力伝達軸及び動力伝達軸の製造方法に関する。 The present invention relates to a power transmission shaft and a method for manufacturing the power transmission shaft.
　車両に搭載される動力伝達軸（プロペラシャフト）は、車両の前後方向に延在し、原動機で発生し変速機で減速された動力を終減速装置に伝達している。
　このような動力伝達軸は、管体と、管体の端部に接続される自在継手と、を備えており、近年、繊維強化プラスチック製の管体が開発されている。 A power transmission shaft (propeller shaft) mounted on the vehicle 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 transmission.
Such a power transmission shaft includes a tubular body and a universal joint connected to an end portion of the tubular body, and in recent years, a tubular body made of fiber reinforced plastic has been developed.
　また、繊維強化プラスチック製の管体と金属製の自在継手との接合は、自在継手の連結部材（スタブヨークやスタブシャフト）の端部に挿入部を形成し、この挿入部を接続部（管体の端部）内に挿入している。また、挿入部は接続部よりも小径に形成され、挿入部の外周面に塗布された接着剤が接続部に接着することで、管体と連結部材とが一体になっている（下記特許文献１，２参照）。 In addition, the joint between the tubular body made of fiber reinforced plastic and the universal joint made of metal is formed by forming an insertion portion at the end of the connecting member (stub yoke or stub shaft) of the universal joint, and connecting this insertion portion to the connection portion (pipe (The end of the). Further, the insertion portion is formed to have a smaller diameter than the connection portion, and the adhesive applied to the outer peripheral surface of the insertion portion adheres to the connection portion, whereby the tube body and the connecting member are integrated (see Patent Document below). 1 and 2).
特開平７－３３２３４６号公報Japanese Patent Laid-Open No. 7-332346 特開平６－１０９０１５号公報JP-A-6-109015
　しかしながら、上記接合方法の場合、接続部内に挿入部を挿入する際、接続部に対して挿入部が傾き、管体と連結部材の軸心が一致しないおそれがある。
　これを回避すべく、挿入部を長尺化して挿入部の傾きを抑える方法が考えられるが、コストの増加や動力伝達軸の重量化を招く。 However, in the case of the above-mentioned joining method, when the insertion portion is inserted into the connection portion, the insertion portion may be tilted with respect to the connection portion, and the axis of the tubular body and the connecting member may not match.
In order to avoid this, a method of increasing the length of the insertion portion to suppress the inclination of the insertion portion can be considered, but this increases the cost and the weight of the power transmission shaft.
　本発明は、このような課題を解決するために創作されたものであり、コストの増加や動力伝達軸の重量化を招くことなく、管体と連結部材との同心度を向上させることができる動力伝達軸及び動力伝達軸の製造方法を提供することを目的とする。 The present invention was created in order to solve such a problem, and it is possible to improve the concentricity between the pipe body and the connecting member without increasing cost and increasing the weight of the power transmission shaft. An object of the present invention is to provide a power transmission shaft and a method for manufacturing the power transmission shaft.
　前記課題を解決するため、本発明に係る動力伝達軸は、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される連結部材と、により構成され、回転することで動力を伝達する動力伝達軸であって、前記管体は、前記連結部材が挿入される接続部を端部に有し、前記連結部材は、前記接続部内に挿入される挿入部と、前記挿入部の外周面から径方向に突出するとともに周方向で互いに離間し、前記接続部の内周面に当接する複数の突状部と、前記複数の突状部間に配置され、前記接続部の内周面と前記挿入部の外周面とを接着する複数の接着層と、を備えることを特徴とする。 In order to solve the above-mentioned problems, a power transmission shaft according to the present invention includes a tubular body made of fiber reinforced plastic and a connecting member connected to an end of the tubular body, and transmits power by rotating. The power transmission shaft, wherein the tubular body has a connecting portion at an end into which the connecting member is inserted, and the connecting member has an inserting portion inserted into the connecting portion and an outer periphery of the inserting portion. A plurality of projecting portions that protrude in the radial direction from the surface and are spaced apart from each other in the circumferential direction and contact the inner circumferential surface of the connecting portion; and the inner circumferential surface of the connecting portion that is arranged between the plurality of projecting portions. And a plurality of adhesive layers for adhering the outer peripheral surface of the insertion portion to each other.
　また、本発明に係る動力伝達軸の製造方法は、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される連結部材と、により構成され、回転することで動力を伝達する動力伝達軸の製造方法であって、前記連結部材が挿入される接続部を端部に有する前記管体と、前記接続部内に挿入される挿入部と、前記挿入部の外周面から径方向に突出するとともに周方向で互いに離間し、前記接続部の内周面に当接する複数の突状部とを備えた連結部材と、を準備する準備工程と、前記複数の突状部間に、前記接続部の内周面と前記挿入部の外周面とを接着する接着剤を塗布する塗布工程と、前記複数の突状部を前記接続部の内周面に当接させながら、前記挿入部を前記接続部内に挿入する挿入工程と、を備えていることを特徴とする。 Further, a method for manufacturing a power transmission shaft according to the present invention comprises a pipe body made of fiber reinforced plastic and a connecting member connected to an end portion of the pipe body, and a power transmitting power by rotating. A method for manufacturing a transmission shaft, comprising: a tubular body having a connecting portion at an end into which the connecting member is inserted; an inserting portion inserted into the connecting portion; and a radial direction protruding from an outer peripheral surface of the inserting portion. And a connecting member that is spaced apart from each other in the circumferential direction and that includes a plurality of protruding portions that come into contact with the inner peripheral surface of the connecting portion; and a connecting step between the plurality of protruding portions. A step of applying an adhesive agent for bonding the inner peripheral surface of the insertion portion and the outer peripheral surface of the insertion portion, and the insertion portion while contacting the plurality of protrusions with the inner peripheral surface of the connection portion. And an inserting step of inserting into the connecting portion.
　本発明によれば、挿入部を接続部内に挿入すると、複数の突状部が接続部の内周面に当接し、挿入部が位置決めされる。よって、接続部に対して挿入部が傾くということが回避され、管体と連結部材との同心度が向上する。 According to the present invention, when the insertion portion is inserted into the connection portion, the plurality of protrusions come into contact with the inner peripheral surface of the connection portion, and the insertion portion is positioned. Therefore, the inclination of the insertion portion with respect to the connection portion is avoided, and the concentricity between the tubular body and the connecting member is improved.
第一実施形態の動力伝達軸を側面視した側面図である。It is the side view which carried out side view of the power transmission shaft of a first embodiment. 第一実施形態の動力伝達軸の本体部を軸線方向に切った断面図である。It is sectional drawing which cut|disconnected the main-body part of the power transmission shaft of 1st embodiment in the axial direction. 第一実施形態の動力軸の前部を拡大した拡大図である。It is an enlarged view which expanded the front part of the power shaft of a first embodiment. 図３のＩＶ－ＩＶ線矢視断面図である。FIG. 4 is a sectional view taken along the line IV-IV of FIG. 3. 第一実施形態のスタブヨーク（連結部材）を抽出して側面視した側面図である。It is the side view which extracted the stub yoke (coupling member) of 1st embodiment, and carried out side view. 第一実施形態の動力伝達軸の製造工程を示すフローチャートである。It is a flow chart which shows a manufacturing process of a power transmission shaft of a first embodiment. 第一実施形態の動力伝達軸の製造方法のうち準備工程を示す側面図である。It is a side view which shows the preparation process of the manufacturing method of the power transmission shaft of 1st embodiment. 第一実施形態の動力伝達軸の製造方法のうち塗布工程を示す側面図である。It is a side view which shows the coating process of the manufacturing method of the power transmission shaft of 1st embodiment. 第一実施形態の動力伝達軸の製造方法のうち挿入工程を示す側面図である。It is a side view which shows the insertion process of the manufacturing method of the power transmission shaft of 1st embodiment. 第二実施形態の動力伝達軸の前部を拡大した拡大図である。It is an enlarged view which expanded the front part of the power transmission shaft of a second embodiment. 第二実施形態のスタブヨーク（連結部材）を抽出して側面視した側面図である。It is the side view which extracted and extracted the stub yoke (coupling member) of 2nd embodiment and was side view. 第三実施形態の動力伝達軸のうち挿入部と第一接続部との断面図である。It is sectional drawing of the insertion part and 1st connection part among the power transmission shafts of 3rd embodiment. 第四実施形態の動力伝達軸のうち挿入部と第一接続部との断面図である。It is sectional drawing of the insertion part and the 1st connection part among the power transmission shafts of 4th embodiment.
　次に、各実施形態の動力伝達軸及びその製造方法について、図面を参照しながら説明する。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、説明を省略する。 Next, the power transmission shaft of each embodiment and the manufacturing method thereof will be described with reference to the drawings. The technical elements common to the respective embodiments are designated by the common reference numerals, and the description thereof will be omitted.
［第一実施形態］
　図１に示すように、動力伝達軸１は、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である。動力伝達軸１は、車両の前後方向に延在しており、軸線Ｏ１回りに回転することで、車体の前部に搭載された変速機から車体の後部に搭載された終減速装置に動力（トルク）を伝達している。 [First embodiment]
As shown in FIG. 1, the power transmission shaft 1 is a propeller shaft mounted on an FF (Front-engine Front-drive)-based four-wheel drive vehicle. The power transmission shaft 1 extends in the front-rear direction of the vehicle, and rotates about an axis O1 to drive power from a transmission mounted in the front part of the vehicle body to a final reduction gear installed in the rear part of the vehicle body ( Torque) is transmitted.
　動力伝達軸１は、炭素繊維強化プラスチック（ＣＦＲＰ）により形成された管体２と、管体２の前側に接続するスタブヨーク（連結部材）３と、管体２の後側に接続するスタブシャフト（連結部材）４とを備えている。
　管体２は、軸線Ｏ１回りに巻回された繊維からなる繊維層と、軸線Ｏ１方向に延在する繊維からなる繊維層と、が積層されて形成されている。このため、管体２は、機械的強度が高く、かつ、軸線Ｏ１方向に高弾性化している。
　また、周方向に配向する繊維としてＰＡＮ系（Ｐｏｌｙａｃｒｙｌｏｎｉｔｒｉｌｅ）繊維が好ましく、軸線Ｏ１方向に配向する繊維としてピッチ繊維が好ましい。
　なお、本発明の管体２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。
　管体２は、本体部１０と、本体部１０の前側に配置された第一接続部２０と、本体部１０の後側に配置された第二接続部３０と、本体部１０と第二接続部３０との間に位置する傾斜部４０と、を備えている。 The power transmission shaft 1 includes a tube body 2 made of carbon fiber reinforced plastic (CFRP), a stub yoke (connecting member) 3 connected to the front side of the tube body 2, and a stub shaft (connected to the rear side of the tube body 2). Connection member) 4.
The tubular body 2 is formed by laminating a fiber layer made of fibers wound around the axis O1 and a fiber layer made of fibers extending in the direction of the axis O1. Therefore, the tubular body 2 has high mechanical strength and high elasticity in the direction of the axis O1.
Further, PAN-based (Polyacrylonitrile) fibers are preferable as the fibers oriented in the circumferential direction, and pitch fibers are preferable as the fibers oriented in the axis O1 direction.
The reinforcing fibers used for the fiber-reinforced plastic in the tubular body 2 of the present invention are not limited to carbon fibers, and may be glass fibers or aramid fibers.
The tube body 2 includes a main body portion 10, a first connecting portion 20 arranged on the front side of the main body portion 10, a second connecting portion 30 arranged on the rear side of the main body portion 10, a main body portion 10, and a second connection. An inclined portion 40 located between the portion 30 and the portion 30.
　なお、図２以降の図面においては、動力伝達軸１の形状を分かり易くするため、動力伝達軸１の形状を誇張して描写している。
　図２に示すように、本体部１０の前端部１１には、第一接続部２０が連続し、本体部１０の後端部１２には、傾斜部４０が連続している。 In addition, in the drawings after FIG. 2, the shape of the power transmission shaft 1 is exaggerated for easy understanding of the shape of the power transmission shaft 1.
As shown in FIG. 2, the first connecting portion 20 is continuous with the front end portion 11 of the main body portion 10, and the inclined portion 40 is continuous with the rear end portion 12 of the main body portion 10.
　軸線Ｏ１を法線とする平面で本体部１０を切った場合、本体部１０の外周面１４の断面形状及び内周面１５の断面形状は、円形状となっている。 When the main body portion 10 is cut along a plane having the axis O1 as a normal, the outer peripheral surface 14 and the inner peripheral surface 15 of the main body portion 10 have a circular sectional shape.
　本体部１０の外径は、中央部１３から両端部（前端部１１及び後端部１２）に向うに連れて縮径しており、中央部１３の外径Ｒ１は、両端部（前端部１１及び後端部１２）の外径Ｒ２よりも大きい。
　つまり、軸線Ｏ１に沿って本体部１０を切った場合、本体部１０の外周面１４の断面形状及び内周面１５の断面形状は、緩やかな曲線を描き、中央部１３が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１０の外形は、中央部１３が径方向外側に膨らむ樽形状（バレル形状）となっている。なお、本体部１０の内径も、本体部１０の中央部１３から両端部（前端部１１及び後端部１２）に向うに連れて縮径している。
　また、その断面形状において、本体部１０の板厚は、両端部（前端部１１及び後端部１２）から中央部１３に向うに連れて薄くなっており、中央部１３の板厚Ｔ１は、両端部（前端部１１及び後端部１２）の板厚Ｔ２よりも薄い。 The outer diameter of the main body portion 10 is reduced from the central portion 13 toward both end portions (the front end portion 11 and the rear end portion 12), and the outer diameter R1 of the central portion 13 is equal to both end portions (the front end portion 11 and the rear end portion 11). And larger than the outer diameter R2 of the rear end portion 12).
That is, when the main body 10 is cut along the axis O1, the cross-sectional shape of the outer peripheral surface 14 and the cross-sectional shape of the inner peripheral surface 15 of the main body 10 draw a gentle curve, and the central portion 13 projects outward. It has an arc shape. Therefore, the outer shape of the main body portion 10 has a barrel shape (barrel shape) in which the central portion 13 bulges outward in the radial direction. The inner diameter of the main body portion 10 is also reduced from the central portion 13 of the main body portion 10 toward both end portions (the front end portion 11 and the rear end portion 12).
Further, in the cross-sectional shape, the plate thickness of the main body portion 10 becomes thinner from both end portions (the front end portion 11 and the rear end portion 12) toward the central portion 13, and the plate thickness T1 of the central portion 13 is It is thinner than the plate thickness T2 at both ends (front end 11 and rear end 12).
　傾斜部４０の外径は、本体部１０から第二接続部３０に向かうに連れて次第に縮径し、円錐台形状となっている。傾斜部４０の板厚は、第二接続部３０側（後側）の端部から本体部１０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４０のうち前端部の板厚が最も薄く、脆弱部を構成している。
　よって、車両が前方から衝突されて動力伝達軸１に衝突荷重が入力すると、軸線Ｏ１に対して傾斜する傾斜部４０にせん断力が作用する。
　そして、傾斜部４０に作用するせん断力が所定値を超えると、傾斜部４０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。
　なお、本発明において、板厚が本体部１０側（前側）の端部から第二接続部３０側（後側）の端部に向かうに連れて漸次薄くなる傾斜部４０であってもよい。これによれば、傾斜部のうち後端部の板厚が最も薄くなり、傾斜部４０の後端部が脆弱部を構成する。若しくは、外周面又は内周面に凹部を設けて一部区間の板厚を変化させることで脆弱部が形成された傾斜部４０であってもよい。 The outer diameter of the inclined portion 40 gradually decreases from the main body portion 10 toward the second connection portion 30, and has a truncated cone shape. The plate thickness of the inclined portion 40 gradually decreases from the end portion on the second connection portion 30 side (rear side) toward the end portion on the main body portion 10 side (front side). For this reason, the plate thickness of the front end portion of the inclined portion 40 is the thinnest, and constitutes the fragile portion.
Therefore, when the vehicle collides from the front and a collision load is input to the power transmission shaft 1, a shearing force acts on the inclined portion 40 that inclines with respect to the axis O1.
Then, when the shearing force acting on the inclined portion 40 exceeds a predetermined value, the front end portion (fragile portion) of the inclined portion 40 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.
In the present invention, the inclined portion 40 may have a plate thickness that gradually decreases from the end portion on the main body portion 10 side (front side) toward the end portion on the second connection portion 30 side (rear side). According to this, the plate thickness of the rear end portion of the inclined portion is thinnest, and the rear end portion of the inclined portion 40 constitutes the fragile portion. Alternatively, it may be the inclined portion 40 in which the fragile portion is formed by providing a concave portion on the outer peripheral surface or the inner peripheral surface and changing the plate thickness of a partial section.
　図１に示すように、第一接続部２０内には、スタブヨーク３の後述する挿入部７が挿入されている。同様に、第二接続部３０内には、等速ジョイントのスタブシャフト４の挿入部４ａが挿入されている。
　また、第一接続部２０とスタブヨーク３の接合構造と、第二接続部３０とスタブシャフト４の接合構造は、同一構造となっている。以下、代表例として、第一接続部２０とスタブヨーク３の接合構造を説明し、第二接続部３０とスタブシャフト４の接合構造については省略する。 As shown in FIG. 1, an insertion portion 7 of the stub yoke 3, which will be described later, is inserted into the first connecting portion 20. Similarly, the insertion portion 4a of the stub shaft 4 of the constant velocity joint is inserted into the second connection portion 30.
Further, the joint structure between the first connecting portion 20 and the stub yoke 3 and the joint structure between the second connecting portion 30 and the stub shaft 4 are the same structure. Hereinafter, as a typical example, the joint structure between the first connecting portion 20 and the stub yoke 3 will be described, and the joint structure between the second connecting portion 30 and the stub shaft 4 will be omitted.
　図３に示すように、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は、軸線Ｏ１を中心とする円盤状の基部５と、基部５から前方に延び十字軸を支承する一対のアーム部６と、基部５から後方に延びて第一接続部２０内に挿入される挿入部７と、を備えている。 As shown in FIG. 3, the stub yoke 3 is a metal member that constitutes a cardan joint. The stub yoke 3 includes a disk-shaped base portion 5 centered on the axis O1, a pair of arm portions 6 extending forward from the base portion 5 and supporting the cross shaft, and extending rearward from the base portion 5 and inserted into the first connecting portion 20. And an insertion portion 7 to be inserted.
　挿入部７は、後端側が開口する筒形状に形成されている。
　図４に示すように、挿入部７の外周面７ａは、軸線Ｏ１を中心とする円形状に形成され、外周面７ａの半径がｒ１となっている。また、第一接続部２０の内周面２０ａは、軸線Ｏ１を中心とする円形状に形成され、内周面２０ａの半径がｒ２となっている。よって、挿入部７の外周面７ａは、第一接続部２０の内周面２０ａよりもｒ３の分だけ半径が小径に形成されている。 The insertion portion 7 is formed in a tubular shape whose rear end side is open.
As shown in FIG. 4, the outer peripheral surface 7a of the insertion portion 7 is formed in a circular shape centered on the axis O1, and the outer peripheral surface 7a has a radius r1. Further, the inner peripheral surface 20a of the first connecting portion 20 is formed in a circular shape centered on the axis O1, and the radius of the inner peripheral surface 20a is r2. Therefore, the outer peripheral surface 7a of the insertion portion 7 has a radius smaller than that of the inner peripheral surface 20a of the first connection portion 20 by r3.
　挿入部７の外周面７ａには、突状部８と、挿入部７の外周面７ａと第一接続部２０の内周面２０ａとを接着する接着層９と、が設けられている。
　突状部８は、断面視で円弧状の板状樹脂部品であり、挿入部７の外周面７ａに接着されている。突状部８は、６つ設けられており、周方向に等間隔で配置されている。
　突状部８の厚みはｒ３となっており、突状部８の外面８ａは、第一接続部２０の内周面２０ａに当接している。 The outer peripheral surface 7a of the insertion portion 7 is provided with a protruding portion 8 and an adhesive layer 9 that adheres the outer peripheral surface 7a of the insertion portion 7 and the inner peripheral surface 20a of the first connecting portion 20.
The protruding portion 8 is a plate-shaped resin component having an arc shape in a sectional view, and is bonded to the outer peripheral surface 7 a of the insertion portion 7. Six protrusions 8 are provided and are arranged at equal intervals in the circumferential direction.
The thickness of the protruding portion 8 is r3, and the outer surface 8a of the protruding portion 8 is in contact with the inner peripheral surface 20a of the first connecting portion 20.
　図５に示すように、突状部８は、前後方向に延在している。よって、突状部８の外面８ａの前端（一端）から後端（他端）までが第一接続部２０の内周面２０ａに当接している（図３参照）。
　また、上記複数の突状部８を配置することで、挿入部７の外周側であって各突状部８の間には、突状部８の外面８ａよりも径方向内側に窪む凹部９ａが形成される。また、凹部９ａは、前後方向に延在しており、凹部９ａの後部が後方に開放している。 As shown in FIG. 5, the projecting portion 8 extends in the front-rear direction. Therefore, the front end (one end) to the rear end (other end) of the outer surface 8a of the protruding portion 8 is in contact with the inner peripheral surface 20a of the first connecting portion 20 (see FIG. 3).
Further, by disposing the plurality of protrusions 8 described above, between the protrusions 8 on the outer peripheral side of the insertion portion 7 and between the protrusions 8, concave portions that are recessed radially inward from the outer surface 8a of the protrusions 8. 9a is formed. The recess 9a extends in the front-rear direction, and the rear portion of the recess 9a is open rearward.
　図４に示すように、接着層９は、凹部９ａ内に塗布されて硬化した接着剤であり、下部が挿入部７の外周面７ａと接着し、上部が第一接続部２０の内周面２０ａと接着している。また、接着層９の厚みは、凹部９ａの深さと同じに、言い換えると、突状部８の厚みｒ３と同じとなっている。 As shown in FIG. 4, the adhesive layer 9 is an adhesive that is applied and hardened in the recess 9 a, and the lower portion is bonded to the outer peripheral surface 7 a of the insertion portion 7, and the upper portion is the inner peripheral surface of the first connection portion 20. It is bonded to 20a. The thickness of the adhesive layer 9 is the same as the depth of the recess 9a, in other words, the same as the thickness r3 of the protrusion 8.
　次に第一実施形態の動力伝達軸１の製造方法について説明する。
　図６に示すように、動力伝達軸１の製造方法は、繊維強化プラスチック製の管体２と金属製のスタブヨーク（連結部材）３とを準備する準備工程（ステップＳ１）と、接着剤９ｂを塗布する塗布工程（ステップＳ２）と、スタブヨーク（連結部材）３を管体２に挿入する挿入工程（ステップＳ３）と、を備えている。 Next, a method for manufacturing the power transmission shaft 1 of the first embodiment will be described.
As shown in FIG. 6, the method for manufacturing the power transmission shaft 1 includes a preparatory step (step S1) of preparing a tubular body 2 made of fiber reinforced plastic and a stub yoke (coupling member) 3 made of metal, and an adhesive 9b. A coating step (step S2) for coating and an insertion step (step S3) for inserting the stub yoke (connecting member) 3 into the tubular body 2 are provided.
（準備工程）
　第一実施形態の準備工程において、本体部１０と第一接続部２０と第二接続部３０と傾斜部４０とを備えた管体２（図１参照）を用意する。
　また、基部５と一対のアーム部６と挿入部７とを備えたスタブヨーク３と、複数の突状部８と、を用意する。そして、図７に示すように、スタブヨーク３における挿入部７の外周面７ａに、複数の突状部８を接着剤で接着させて固定する。
　各突状部８は、挿入部７の外周面７ａに対して前後方向に延在するように配置するとともに、周方向に隣り合う突状部８に所定距離離間するように配置する。 (Preparation process)
In the preparation step of the first embodiment, the tubular body 2 (see FIG. 1) including the main body portion 10, the first connecting portion 20, the second connecting portion 30, and the inclined portion 40 is prepared.
Further, a stub yoke 3 having a base 5, a pair of arms 6 and an insertion portion 7, and a plurality of protrusions 8 are prepared. Then, as shown in FIG. 7, a plurality of protrusions 8 are fixed to the outer peripheral surface 7a of the insertion portion 7 of the stub yoke 3 with an adhesive.
The protrusions 8 are arranged so as to extend in the front-rear direction with respect to the outer peripheral surface 7a of the insertion portion 7, and are arranged so as to be separated from the protrusions 8 adjacent in the circumferential direction by a predetermined distance.
（塗布工程）
　図８に示すように、塗布工程は、凹部９ａ内に接着剤９ｂを塗布する。また、接着剤９ｂの塗布量は、突状部８の外面８ａよりも径方向外側に突出する程度、言い換えると、接着剤９ｂの厚みがｒ３を超える程度となるように塗布する。 (Coating process)
As shown in FIG. 8, in the applying step, the adhesive 9b is applied in the recess 9a. The amount of the adhesive 9b applied is such that the adhesive 9b protrudes outward in the radial direction with respect to the outer surface 8a of the protruding portion 8, in other words, the thickness of the adhesive 9b exceeds r3.
（挿入工程）
　図９に示すように、挿入工程は、スタブヨーク３を第一接続部２０の前方に配置し、挿入部７を第一接続部２０の前開口に挿入する。挿入部７の一部が第一接続部２０内に挿入されたら、突状部８の外面８ａを第一接続部２０の内周面２０ａに当接（摺動）させながら挿入部７を第一接続部２０内にさらに押し込む。
　挿入部７の全てが第一接続部２０内に挿入されたら、そのまま放置する。これによれば、接着剤９ｂが硬化して、挿入部７と第一接続部２０とを接着させる接着層９が形成される。
　なお、当該挿入工程において、接着剤９ｂは、凹部９ａの容積よりも多く塗布されているところ、凹部９ａの後部が開放しているため、余分な接着剤９ｂは、凹部９ａの後部から後方に流出する（図９の矢印参照）。よって、突状部８の外面８ａと第一接続部２０の内周面２０ａとの間に接着剤９ｂが流入し難くなっている。 (Insertion process)
As shown in FIG. 9, in the inserting step, the stub yoke 3 is arranged in front of the first connecting portion 20, and the inserting portion 7 is inserted into the front opening of the first connecting portion 20. When a part of the insertion portion 7 is inserted into the first connection portion 20, the insertion portion 7 is moved to the first side while contacting (sliding) the outer surface 8a of the protruding portion 8 with the inner peripheral surface 20a of the first connection portion 20. Push it further into one connection part 20.
When the entire insertion portion 7 is inserted into the first connection portion 20, it is left as it is. According to this, the adhesive 9b is cured to form the adhesive layer 9 that adheres the insertion portion 7 and the first connection portion 20.
In addition, in the insertion step, since the adhesive 9b is applied in a larger amount than the volume of the recess 9a, the rear portion of the recess 9a is open. Therefore, the excess adhesive 9b is moved backward from the rear of the recess 9a. It flows out (see the arrow in FIG. 9). Therefore, the adhesive 9b is less likely to flow between the outer surface 8a of the protruding portion 8 and the inner peripheral surface 20a of the first connecting portion 20.
　以上、第一実施形態の動力伝達軸１によれば、各突状部８の外面８ａが第一接続部２０の内周面２０ａに当接して挿入部７が位置決めされ、挿入部７の軸心と第一接続部２０の軸心とが一致する。また、各突状部８の外面８ａの前端から後端に亘って第一接続部２０に当接していることから、挿入部７の軸心が第一接続部２０の軸心に対して傾斜しないようになっている。以上から、管体２とスタブヨーク３との同心度が向上している。
　また、管体２とスタブヨーク３との同心度が向上していることから、各接着層９の厚みも均一となり、接着強度の均一化を図ることができる。 As described above, according to the power transmission shaft 1 of the first embodiment, the outer surface 8a of each protruding portion 8 abuts the inner peripheral surface 20a of the first connecting portion 20, the insertion portion 7 is positioned, and the shaft of the insertion portion 7 is positioned. The core and the axial center of the first connecting portion 20 coincide with each other. Further, since the outer surface 8a of each projecting portion 8 is in contact with the first connecting portion 20 from the front end to the rear end, the axis of the insertion portion 7 is inclined with respect to the axis of the first connecting portion 20. It is supposed not to. From the above, the concentricity between the tubular body 2 and the stub yoke 3 is improved.
Further, since the concentricity between the tubular body 2 and the stub yoke 3 is improved, the thickness of each adhesive layer 9 is also uniform, and the adhesive strength can be made uniform.
　また、動力伝達軸１について、曲げ応力が集中し易い本体部１０の中央部１３は、外径Ｒ１が大径に形成され、所定の曲げ強度を有している。一方で、曲げ応力が集中し難い本体部１１０の両端部（前端部１１及び後端部１２）は、外径Ｒ２が小径に形成され、軽量化している。また、本体部１０の中央部１３は、板厚Ｔ１が薄く軽量化している。よって、動力伝達軸１の管体２は、中央部１３の所定の曲げ剛性を確保しつつ本体部１０が軽量化しており、曲げ一次共振点が向上している。 Further, with respect to the power transmission shaft 1, the central portion 13 of the main body 10 in which bending stress is easily concentrated has an outer diameter R1 formed to be large, and has a predetermined bending strength. On the other hand, both ends (the front end portion 11 and the rear end portion 12) of the main body portion 110 where the bending stress is hard to concentrate are formed to have a small outer diameter R2 and are lightened. Further, the central portion 13 of the main body portion 10 has a thin plate thickness T1 and is lightweight. Therefore, in the tubular body 2 of the power transmission shaft 1, the main body portion 10 is lightened while ensuring a predetermined bending rigidity of the central portion 13, and the bending primary resonance point is improved.
［第二実施形態］
　次に第二実施形態の動力伝達軸１０１について図１０、図１１を参照しながら説明する。動力伝達軸１０１は、管体２と、スタブヨーク３と、スタブシャフト４とを備えている。スタブヨーク３は、基部５と、一対のアーム部６と、挿入部７と、を備えている。
　挿入部７の外周面７ａには、複数の突状部１０８と、挿入部７の外周面７ａと第一接続部２０とを接着する接着層９と、が設けられている。以下、第一実施形態との相違点に絞って説明する。
　図１０、図１１に示すように、第二実施形態の突状部１０８は、前後に離間した一対の板材１０８ａ，１０８ｂにより構成されている。前側の板材１０８ａは、挿入部７の外周面７ａの前端（一端）に接着され、後側の板材１０８ｂは、挿入部７の外周面７ａの後部端（他端）に接着されている。前側の板材１０８ａと後側の板材１０８ｂは、各々６つ設けられており、周方向に等間隔で配置されている。 [Second embodiment]
Next, the power transmission shaft 101 of the second embodiment will be described with reference to FIGS. 10 and 11. The power transmission shaft 101 includes a tube body 2, a stub yoke 3, and a stub shaft 4. The stub yoke 3 includes a base portion 5, a pair of arm portions 6 and an insertion portion 7.
The outer peripheral surface 7 a of the insertion portion 7 is provided with a plurality of protrusions 108 and an adhesive layer 9 that adheres the outer peripheral surface 7 a of the insertion portion 7 and the first connecting portion 20. Hereinafter, description will be made focusing on the differences from the first embodiment.
As shown in FIGS. 10 and 11, the protruding portion 108 of the second embodiment is composed of a pair of plate members 108a and 108b that are spaced apart from each other in the front-rear direction. The front plate material 108a is bonded to the front end (one end) of the outer peripheral surface 7a of the insertion portion 7, and the rear plate material 108b is bonded to the rear end (other end) of the outer peripheral surface 7a of the insertion portion 7. The front plate member 108a and the rear plate member 108b are each provided in six pieces, and are arranged at equal intervals in the circumferential direction.
　以上、第二実施形態の動力伝達軸１０１によっても、各突状部１０８の外周面が第一接続部２０の内周面２０ａに当接して挿入部７が位置決めされ、挿入部７の軸心と第一接続部２０の軸心とが一致する。また、前後に離間した一対の板材１０８ａ，１０８ｂが第一接続部２０に当接していることから、挿入部７の軸心が第一接続部２０の軸心に対して傾斜しないようになっている。以上から、管体２とスタブヨーク３との同心度が向上している。
　また、第二実施形態の動力伝達軸１０１によれば、一対の板材１０８ａ，１０８ｂの間に接着層９を設けることができるため、接着強度が向上している。 As described above, also by the power transmission shaft 101 of the second embodiment, the outer peripheral surface of each protruding portion 108 abuts the inner peripheral surface 20a of the first connecting portion 20 to position the insertion portion 7, and the axial center of the insertion portion 7 And the axis of the first connecting portion 20 coincide with each other. Further, since the pair of plate members 108 a and 108 b that are separated from each other in the front and rear are in contact with the first connecting portion 20, the axis of the insertion portion 7 is prevented from inclining with respect to the axis of the first connecting portion 20. There is. From the above, the concentricity between the tubular body 2 and the stub yoke 3 is improved.
Further, according to the power transmission shaft 101 of the second embodiment, since the adhesive layer 9 can be provided between the pair of plate members 108a and 108b, the adhesive strength is improved.
［第三実施形態］
　次に第三実施形態の動力伝達軸２０１について図１２を参照しながら説明する。
　動力伝達軸２０１は、管体２０２と、スタブヨーク２０３と、スタブシャフト４とを備えている。管体２０２は、本体部１０と、第一接続部２２０と、第二接続部３０と、傾斜部４０と、を備えている。スタブヨーク２０３は、基部５と、一対のアーム部６と、挿入部２０７と、を備えている。
　挿入部２０７の外周面２０７ａには、複数の突状部２０８と、挿入部２０７の外周面２０７ａと第一接続部２２０とを接着する接着層２０９と、が設けられている。以下、第一実施形態との相違点に絞って説明する。 [Third embodiment]
Next, the power transmission shaft 201 of the third embodiment will be described with reference to FIG.
The power transmission shaft 201 includes a tubular body 202, a stub yoke 203, and the stub shaft 4. The tubular body 202 includes a main body portion 10, a first connecting portion 220, a second connecting portion 30, and an inclined portion 40. The stub yoke 203 includes a base portion 5, a pair of arm portions 6 and an insertion portion 207.
The outer peripheral surface 207a of the insertion portion 207 is provided with a plurality of protrusions 208, and an adhesive layer 209 for bonding the outer peripheral surface 207a of the insertion portion 207 and the first connecting portion 220. Hereinafter, description will be made focusing on the differences from the first embodiment.
　図１２に示すように、管体２０２の第一接続部２２０は、断面形状が多角形（六角形）状に形成され、第一接続部２２０の内周面２２０ａは、６つの角部２２１と、平面状に形成された６つの辺部２２２と、を備えている。
　同様に、スタブヨーク２０３の挿入部２０７は、断面形状が多角形（六角形）状に形成されており、挿入部２０７の外周面２０７ａは、６つの角部２０７ｂと、平面状に形成された６つの辺部２０７ｃと、を備えている。 As shown in FIG. 12, the first connecting portion 220 of the tubular body 202 is formed in a polygonal (hexagonal) cross section, and the inner peripheral surface 220a of the first connecting portion 220 has six corners 221. , And six side portions 222 formed in a plane shape.
Similarly, the insertion portion 207 of the stub yoke 203 has a polygonal (hexagonal) cross-sectional shape, and the outer peripheral surface 207a of the insertion portion 207 has six corner portions 207b and a flat shape. And two side portions 207c.
　突状部２０８は、断面視で平板状に形成されており、挿入部２０７の外周面２０７ａに接着され、外周面２０７ａの前端（一端）から後端（他端）に亘って延在している。また、突状部２０８は、挿入部２０７の外周面２０７ａのうち辺部２０７ｃ上に配置され、外面が第一接続部２２０の辺部２２２に当接している。
　接着層２０９は、複数の突状部２０８間に設けられており、挿入部２０７の外周面２０７ａの角部２０７ｂと、第一接続部２２０の内周面２２０ａの角部２２１とを接着している。 The projecting portion 208 is formed in a flat plate shape in a sectional view, adheres to the outer peripheral surface 207a of the insertion portion 207, and extends from the front end (one end) to the rear end (other end) of the outer peripheral surface 207a. There is. Further, the protruding portion 208 is arranged on the side portion 207c of the outer peripheral surface 207a of the insertion portion 207, and the outer surface thereof is in contact with the side portion 222 of the first connecting portion 220.
The adhesive layer 209 is provided between the plurality of protruding portions 208, and bonds the corner portion 207b of the outer peripheral surface 207a of the insertion portion 207 and the corner portion 221 of the inner peripheral surface 220a of the first connecting portion 220. There is.
　以上、第三実施形態によっても、各突状部２０８の外面が第一接続部２２０の内周面２２０ａに当接して挿入部２０７が位置決めされ、挿入部２０７の軸心と第一接続部２２０の軸心とが一致する。また、前後に延在する突状部２０８が第一接続部２２０に当接していることから、挿入部２０７の軸心が第一接続部２２０の軸心に対して傾斜しないようになっている。以上から、管体２０２とスタブヨーク２０３との同心度が向上している。
　また、挿入部２０７の外周面２０７ａと第一接続部２２０の内周面２２０ａは、多角形状に形成されており、突状部２０８を介して周方向に係止している。よって、管体２０２とスタブヨーク２０３とが相対回転しないように構成されている。 As described above, also in the third embodiment, the outer surface of each protruding portion 208 abuts the inner peripheral surface 220a of the first connecting portion 220 to position the insertion portion 207, and the axis of the insertion portion 207 and the first connection portion 220 are positioned. Coincide with the axis of. Further, since the projecting portion 208 extending in the front-rear direction is in contact with the first connecting portion 220, the axial center of the insertion portion 207 is not inclined with respect to the axial center of the first connecting portion 220. .. From the above, the concentricity between the tubular body 202 and the stub yoke 203 is improved.
Further, the outer peripheral surface 207a of the insertion portion 207 and the inner peripheral surface 220a of the first connecting portion 220 are formed in a polygonal shape, and are locked in the circumferential direction via the protruding portion 208. Therefore, the tubular body 202 and the stub yoke 203 are configured so as not to rotate relative to each other.
［第四実施形態］
　次に第四実施形態の動力伝達軸３０１について図１３を参照しながら説明する。
　動力伝達軸３０１は、管体３０２と、スタブヨーク３０３と、スタブシャフト４とを備えている。管体３０２は、本体部１０と、第一接続部３２０と、第二接続部３０と、傾斜部４０と、を備えている。スタブヨーク３０３は、基部５と、一対のアーム部６と、挿入部３０７と、を備えている。挿入部３０７の外周面３０７ａには、複数の突状部２０８と、挿入部２０７の外周面２０７ａと第一接続部２２０とを接着する接着層２０９と、が設けられている。以下、第一実施形態との相違点に絞って説明する。 [Fourth Embodiment]
Next, the power transmission shaft 301 of the fourth embodiment will be described with reference to FIG.
The power transmission shaft 301 includes a tube body 302, a stub yoke 303, and the stub shaft 4. The tubular body 302 includes a main body portion 10, a first connecting portion 320, a second connecting portion 30, and an inclined portion 40. The stub yoke 303 includes a base portion 5, a pair of arm portions 6 and an insertion portion 307. The outer peripheral surface 307a of the insertion portion 307 is provided with a plurality of protrusions 208, and an adhesive layer 209 that adheres the outer peripheral surface 207a of the insertion portion 207 and the first connection portion 220. Hereinafter, description will be made focusing on the differences from the first embodiment.
　図１３に示すように、管体３０２の第一接続部３２０は、断面形状が多角形（六角形）状に形成され、第一接続部３２０の内周面３２０ａは、６つの角部３２１と、平面状に形成された６つの辺部３２２と、を備えている。
　同様に、スタブヨーク３０３の挿入部３０７は、断面形状が多角形（六角形）状に形成されており、挿入部３０７の外周面３０７ａは、６つの角部３０７ｂと、平面状に形成された６つの辺部３０７ｃと、を備えている。 As shown in FIG. 13, the first connecting portion 320 of the tubular body 302 has a polygonal (hexagonal) cross-sectional shape, and the inner peripheral surface 320a of the first connecting portion 320 has six corners 321. , And six side portions 322 formed in a plane shape.
Similarly, the insertion portion 307 of the stub yoke 303 has a polygonal (hexagonal) cross-sectional shape, and the outer peripheral surface 307a of the insertion portion 307 has six corner portions 307b and a flat shape. And one side portion 307c.
　突状部３０８は、断面視で略Ｌ字状に形成され、挿入部３０７の外周面３０７ａに接着され、外周面３０７ａの前端（一端）から後端（他端）に亘って延在している。また、突状部３０８は、挿入部３０７の外周面３０７ａのうち角部３０７ｂ上に配置され、外面が第一接続部３２０の角部３２１に当接している。
　接着層３０９は、複数の突状部３０８間に設けられており、挿入部３０７の外周面２０７ａの辺部３０７ｃと、第一接続部２２０の内周面２２０ａの辺部３２２とを接着している。 The projecting portion 308 is formed in a substantially L shape in a sectional view, is bonded to the outer peripheral surface 307a of the insertion portion 307, and extends from the front end (one end) to the rear end (other end) of the outer peripheral surface 307a. There is. Further, the protruding portion 308 is arranged on the corner portion 307b of the outer peripheral surface 307a of the insertion portion 307, and the outer surface thereof is in contact with the corner portion 321 of the first connecting portion 320.
The adhesive layer 309 is provided between the plurality of protrusions 308, and adheres the side portion 307c of the outer peripheral surface 207a of the insertion portion 307 and the side portion 322 of the inner peripheral surface 220a of the first connecting portion 220. There is.
　以上、第四実施形態によっても、各突状部３０８の外面が第一接続部３２０の内周面３２０ａに当接して挿入部３０７が位置決めされ、挿入部３０７の軸心と第一接続部３２０の軸心とが一致する。また、前後に延在する突状部３０８が第一接続部３２０に当接していることから、挿入部３０７の軸心が第一接続部３２０の軸心に対して傾斜しないようになっている。以上から、管体３０２とスタブヨーク３０３との同心度が向上している。
　また、挿入部３０７の外周面３０７ａと第一接続部３２０の内周面３２０ａは、多角形状に形成されており、突状部３０８を介して周方向に係止している。よって、管体３０２とスタブヨーク３０３とが相対回転しないように構成されている。 As described above, also in the fourth embodiment, the outer surface of each protruding portion 308 abuts the inner peripheral surface 320a of the first connection portion 320 to position the insertion portion 307, and the axial center of the insertion portion 307 and the first connection portion 320. Coincide with the axis of. Further, since the protruding portion 308 extending in the front-rear direction is in contact with the first connecting portion 320, the axial center of the inserting portion 307 is not inclined with respect to the axial center of the first connecting portion 320. .. From the above, the concentricity between the tubular body 302 and the stub yoke 303 is improved.
Further, the outer peripheral surface 307a of the insertion portion 307 and the inner peripheral surface 320a of the first connecting portion 320 are formed in a polygonal shape, and are locked in the circumferential direction via the protruding portion 308. Therefore, the tubular body 302 and the stub yoke 303 are configured so as not to rotate relative to each other.
　以上、各実施形態について説明したが、本発明の管体に関し、軸線Ｏ１方向に沿って切った本体部の断面形状は円弧状のものに限定されない。例えば、軸線Ｏ１に沿って切った本体部の断面形状が階段状となっていてもよい。
　また、本発明の本体部は、両端部よりも中央部が径方向外側に膨らんでいるが、一端から他端まで同一外径であってもよい。もしくは、本体部は、一端から中央部までが同一外形であり、中央部から他端に向うに連れて次第に縮径するようになっていてもよい。 Although the respective embodiments have been described above, regarding the tubular body of the present invention, the cross-sectional shape of the main body section taken along the axis O1 direction is not limited to the arc shape. For example, the cross-sectional shape of the main body section taken along the axis O1 may be stepwise.
Further, in the main body portion of the present invention, the central portion bulges outward in the radial direction rather than the both end portions, but the outer diameter may be the same from one end to the other end. Alternatively, the main body portion may have the same outer shape from one end to the central portion, and the diameter thereof may be gradually reduced from the central portion toward the other end.
　突状部について、実施形態では材質を樹脂製と説明したが、本発明において特に限定せず、金属材料で形成されてもよく、さらには、スタブヨーク等の連結部材と一体に形成されていてもよい。
　また、第三実施形態及び第四実施形態の突状部は、スタブヨークの挿入部の外周面の前端（一端）から後端（他端）に亘って延在しているが、第二実施形態のように前後に離間していても構わない。
なお、説明の都合上、前端を一端、後端を他端と示したが、これに限定されない。例えば、前端を他端、後端を一端としてもよい。 In the embodiment, the material of the protruding portion is described as a resin, but the present invention is not particularly limited thereto, and may be formed of a metal material, or may be formed integrally with a connecting member such as a stub yoke. Good.
In addition, the protruding portions of the third embodiment and the fourth embodiment extend from the front end (one end) to the rear end (the other end) of the outer peripheral surface of the insertion portion of the stub yoke, but the second embodiment It may be separated in the front and back as shown in.
For convenience of explanation, the front end is shown as one end and the rear end is shown as the other end, but the present invention is not limited to this. For example, the front end may be the other end and the rear end may be the one end.
　また、実施形態において、本発明を第一接続部２０とスタブヨーク３の接合構造に適用した例をあげたが、第二接続部３０とスタブシャフト４の接合構造に本発明を適用してもよい。
　又は、第一接続部２０とスタブヨーク３の接合構造と、第二接続部３０とスタブシャフト４の接合構造との両方に本発明を適用してもよい。そして、第一接続部２０とスタブヨーク３の接合構造と、第二接続部３０とスタブシャフト４の接合構造との両方に本発明を適用した場合であっても、第一接続部２０とスタブヨーク３の接合構造と、第二接続部３０とスタブシャフト４の接合構造と、が同一でなくてもよく、例えば、第一接続部２０とスタブヨーク３の接合構造が第一実施形態が適用され、第二接続部３０とスタブシャフト４の接合構造に第二実施形態が適用されてもよい。 Further, in the embodiment, the example in which the present invention is applied to the joint structure of the first connecting portion 20 and the stub yoke 3 has been described, but the present invention may be applied to the joint structure of the second connecting portion 30 and the stub shaft 4. ..
Alternatively, the present invention may be applied to both the joint structure of the first connecting portion 20 and the stub yoke 3 and the joint structure of the second connecting portion 30 and the stub shaft 4. Then, even when the present invention is applied to both the joint structure of the first connecting portion 20 and the stub yoke 3 and the joint structure of the second connecting portion 30 and the stub shaft 4, the first connecting portion 20 and the stub yoke 3 are also provided. And the joining structure of the second connecting portion 30 and the stub shaft 4 may not be the same. For example, the joining structure of the first connecting portion 20 and the stub yoke 3 is applied to the first embodiment, The second embodiment may be applied to the joint structure of the two connection part 30 and the stub shaft 4.
　１，１０１，２０１，３０１　動力伝達軸
　２，２０２，３０２　管体
　３，２０３，３０３　スタブヨーク（連結部材）
　４　　　スタブシャフト（連結部材）
　４ａ　　挿入部
　７，２０７，３０７　挿入部
　８，１０８，２０８，３０８　突状部
　９，２０９，３０９　接着層
　９ａ　　凹部
　９ｂ　　接着剤
　１０，１１０　本体部
　２０，２２０，３２０　第一接続部
　３０　　第二接続部
　４０　　傾斜部
　２０７ｂ，２２１，３０７ｂ，３２１　角部
　２０７ｃ，２２２，３０７ｃ，３２２　辺部 1, 101, 201, 301 Power transmission shaft 2, 202, 302 Tube body 3, 203, 303 Stub yoke (connecting member)
4 Stub shaft (connecting member)
4a Insertion part 7,207,307 Insertion part 8,108,208,308 Protruding part 9,209,309 Adhesive layer 9a Recess 9b Adhesive 10,110 Main body part 20,220,320 First connection part 30 Second connection Part 40 Inclined part 207b, 221, 307b, 321 Corner part 207c, 222, 307c, 322 Side part

Claims (8)

  1. 　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される連結部材と、により構成され、回転することで動力を伝達する動力伝達軸であって、
    　前記管体は、前記連結部材が挿入される接続部を端部に有し、
    　前記連結部材は、
    　前記接続部内に挿入される挿入部と、
    　前記挿入部の外周面から径方向に突出するとともに周方向で互いに離間し、前記接続部の内周面に当接する複数の突状部と、
    　前記複数の突状部間に配置され、前記接続部の内周面と前記挿入部の外周面とを接着する複数の接着層と、
    　を備えることを特徴とする動力伝達軸。     A power transmission shaft configured by a tube body made of fiber reinforced plastic and a connecting member connected to an end portion of the tube body, the power transmission shaft transmitting power by rotating,
    The tubular body has a connecting portion at the end into which the connecting member is inserted,
    The connecting member is
    An insertion portion inserted into the connection portion,
    A plurality of projecting portions that protrude from the outer peripheral surface of the insertion portion in the radial direction and are separated from each other in the circumferential direction, and contact the inner peripheral surface of the connecting portion,
    A plurality of adhesive layers that are disposed between the plurality of protruding portions and that bond the inner peripheral surface of the connection portion and the outer peripheral surface of the insertion portion,
    A power transmission shaft comprising:
  2. 　前記繊維強化プラスチックは、炭素繊維強化プラスチックであることを特徴とする請求項１に記載の動力伝達軸。 The power transmission shaft according to claim 1, wherein the fiber-reinforced plastic is carbon fiber-reinforced plastic.
  3. 　前記突状部は、前記挿入部の外周面の軸方向一端から他端まで延在していることを特徴とする請求項１又は請求項２に記載の動力伝達軸。 The power transmission shaft according to claim 1 or 2, wherein the protruding portion extends from one end in the axial direction of the outer peripheral surface of the insertion portion to the other end.
  4. 　前記突状部は、前記挿入部の外周面の軸方向一端と他端に離間して配置されていることを特徴とする請求項１又は請求項２に記載の動力伝達軸。 The power transmission shaft according to claim 1 or 2, wherein the protruding portion is arranged at one end and the other end in the axial direction of the outer peripheral surface of the insertion portion so as to be separated from each other.
  5. 　前記接続部の内周面と前記挿入部の外周面とは、多角形面となっていることを特徴とする請求項１から請求項４のいずれか１項に記載の動力伝達軸。 The power transmission shaft according to any one of claims 1 to 4, wherein the inner peripheral surface of the connection portion and the outer peripheral surface of the insertion portion are polygonal surfaces.
  6. 　前記突状部は、前記多角形面の辺部に配置されていることを特徴とする請求項５に記載の動力伝達軸。 The power transmission shaft according to claim 5, wherein the protruding portion is arranged on a side portion of the polygonal surface.
  7. 　前記突状部は、前記多角形面の角部に配置されていることを特徴とする請求項５に記載の動力伝達軸。 The power transmission shaft according to claim 5, wherein the protrusions are arranged at corners of the polygonal surface.
  8. 　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される連結部材と、により構成され、回転することで動力を伝達する動力伝達軸の製造方法であって、
    　前記連結部材が挿入される接続部を端部に有する前記管体と、
    　前記接続部内に挿入される挿入部と、前記挿入部の外周面から径方向に突出するとともに周方向で互いに離間し、前記接続部の内周面に当接する複数の突状部とを備えた連結部材と、を準備する準備工程と、
    　前記複数の突状部間に、前記接続部の内周面と前記挿入部の外周面とを接着する接着剤を塗布する塗布工程と、
    　前記複数の突状部を前記接続部の内周面に当接させながら、前記挿入部を前記接続部内に挿入する挿入工程と、を備えてい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 configured to include a fiber-reinforced plastic pipe body and a connecting member connected to an end portion of the pipe body, and transmitting power by rotating.
    The tube body having a connecting portion at the end into which the connecting member is inserted;
    An insertion portion to be inserted into the connection portion; and a plurality of protruding portions that radially protrude from the outer peripheral surface of the insertion portion and are spaced apart from each other in the circumferential direction, and that abut on the inner peripheral surface of the connection portion. A preparatory step of preparing the connecting member,
    Between the plurality of protrusions, a coating step of applying an adhesive that bonds the inner peripheral surface of the connection portion and the outer peripheral surface of the insertion portion,
    And a step of inserting the insertion portion into the connection portion while bringing the plurality of protrusions into contact with the inner peripheral surface of the connection portion.
PCT/JP2019/010056 2019-02-27 2019-03-12 Motive power transmission shaft and production method for motive power transmission shaft WO2020174699A1 (en)

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JP2019033886 2019-02-27

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56122816U (en) * 1980-02-20 1981-09-18
JPS59219511A (en) * 1983-05-27 1984-12-10 本田技研工業株式会社 Bonding joining structure of two member
JPS6250316U (en) * 1985-09-18 1987-03-28
JPH06109015A (en) * 1992-09-28 1994-04-19 Toyota Motor Corp Drive shaft made of composite-material
JPH07332346A (en) * 1994-05-31 1995-12-22 Dana Corp Driving shaft assembly and manufacture thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56122816U (en) * 1980-02-20 1981-09-18
JPS59219511A (en) * 1983-05-27 1984-12-10 本田技研工業株式会社 Bonding joining structure of two member
JPS6250316U (en) * 1985-09-18 1987-03-28
JPH06109015A (en) * 1992-09-28 1994-04-19 Toyota Motor Corp Drive shaft made of composite-material
JPH07332346A (en) * 1994-05-31 1995-12-22 Dana Corp Driving shaft assembly and manufacture thereof

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