JP2020051551A

JP2020051551A - Elastic joint

Info

Publication number: JP2020051551A
Application number: JP2018182623A
Authority: JP
Inventors: 誠一森山; Seiichi Moriyama
Original assignee: NSK Ltd
Current assignee: NSK Ltd
Priority date: 2018-09-27
Filing date: 2018-09-27
Publication date: 2020-04-02

Abstract

To realize a structure capable of easily adjusting a phase of a yoke part to a flanged shaft member of a first joint member in a circumferential direction.SOLUTION: In a state where a cylindrical part 55 of a yoke 50 is externally fitted to one axial end part of a shaft part 23 of a flanged shaft member 20, and a male serration part 22 and a female serration part 57 are engaged with each other, a base end part of a shaft part 60 of a tightening member 51 is inserted into a tightening hole 59a, and the tip part of the shaft part 60 is screwed into a tightening hole 59b and further tightened. Consequently, the interval between the inner surfaces of a pair of tightening flange parts 56a, 56b is reduced, and the inner diameter of a cylindrical part 55 is reduced, so that a clamp part 53 of the yoke 50 is externally fitted and fixed to the shaft part 23 of the flanged shaft member 20 to form a first joint member 11a.SELECTED DRAWING: Figure 2

Description

本発明は、例えばステアリング装置に組み込むことにより、車両走行時に、車輪から伝わる振動を軽減する弾性継手に関する。 The present invention relates to an elastic joint that reduces vibration transmitted from wheels during running of a vehicle, for example, by being incorporated in a steering device.

図１１は、自動車用のステアリング装置の従来構造の１例を示している。ステアリング装置は、ステアリングホイール１と、ステアリングシャフト２と、ステアリングコラム３と、１対の自在継手４ａ、４ｂと、中間シャフト５と、ステアリングギヤユニット６と、１対のタイロッド７とを備える。 FIG. 11 shows an example of a conventional structure of a steering device for an automobile. The steering device includes a steering wheel 1, a steering shaft 2, a steering column 3, a pair of universal joints 4a and 4b, an intermediate shaft 5, a steering gear unit 6, and a pair of tie rods 7.

ステアリングホイール１は、ステアリングコラム３の内側に回転自在に支持されたステアリングシャフト２の後端部に取り付けられている。ステアリングシャフト２の前端部は、１対の自在継手４ａ、４ｂおよび中間シャフト５を介して、ステアリングギヤユニット６のピニオン軸８に接続されている。そして、ピニオン軸８の回転を図示しないラックの直線運動に変換することにより、１対のタイロッド７を押し引きし、操舵輪にステアリングホイール１の操作量に応じた舵角を付与する。なお、前後方向とは、ステアリング装置が組み付けられる車体の前後方向をいう。 The steering wheel 1 is attached to a rear end of a steering shaft 2 rotatably supported inside a steering column 3. The front end of the steering shaft 2 is connected to a pinion shaft 8 of a steering gear unit 6 via a pair of universal joints 4a, 4b and an intermediate shaft 5. Then, by converting the rotation of the pinion shaft 8 into a linear motion of a rack (not shown), the pair of tie rods 7 are pushed and pulled, and a steering angle corresponding to the operation amount of the steering wheel 1 is given to the steered wheels. Note that the front-back direction refers to the front-back direction of the vehicle body to which the steering device is assembled.

自動車用のステアリング装置では、車両走行時に、操舵輪から入力される振動がステアリングホイールに伝わることを防止するため、該ステアリングホイールに入力された操舵力を操舵輪に伝達する操舵力伝達経路中に、具体的には、例えば中間シャフトに、実開昭６０−１５９２２９号公報や特開平９−７９２７９号公報などに記載の弾性継手を組み込むことが行われている。弾性継手は、１対の継手部材を、弾性部材を介して結合してなる。 In a steering device for an automobile, during traveling of a vehicle, in order to prevent the vibration input from the steered wheels from being transmitted to the steering wheel, the steering device transmits a steering force input to the steering wheel to a steered wheel during a steering force transmission path. Specifically, for example, an elastic joint described in Japanese Utility Model Laid-Open No. 60-159229 or Japanese Patent Application Laid-Open No. 9-79279 is incorporated into an intermediate shaft. The elastic joint is formed by connecting a pair of joint members via an elastic member.

実開昭６０−１５９２２９号公報Japanese Utility Model Publication No. 60-159229 特開平９−７９２７９号公報JP-A-9-79279

図１２〜図１５（Ｂ）は、実開昭６０−１５９２２９号公報や特開平９−７９２７９号公報に記載された構造とは異なるが、本発明者らが先に考えた、弾性継手９を示している。弾性継手９は、軸方向一方側（図１２〜図１４および図１５（Ａ）の右側）の端部にヨーク部１０を有する第１継手部材１１と、第２継手部材１２とを、ゴムの如きエラストマーなどの弾性材製の弾性部材１３を介して結合してなる。具体的には、第１継手部材１１と弾性部材１３とを、それぞれがナット１４ａとボルト１５ａとからなる複数本の第１結合部材１６により結合し、かつ、第２継手部材１２と弾性部材１３とを、それぞれがナット１４ｂとボルト１５ｂとからなる複数本の第２結合部材１７により結合している。 12 to 15B are different from the structures described in Japanese Utility Model Laid-Open No. 60-159229 and Japanese Patent Application Laid-Open No. 9-79279, but the elastic joint 9 considered by the present inventors has been described. Is shown. The elastic joint 9 includes a first joint member 11 having a yoke portion 10 at one axial end (right side in FIGS. 12 to 14 and FIG. 15A) and a second joint member 12 formed of rubber. It is connected via an elastic member 13 made of an elastic material such as an elastomer. Specifically, the first joint member 11 and the elastic member 13 are joined by a plurality of first joint members 16 each including a nut 14a and a bolt 15a, and the second joint member 12 and the elastic member 13 are joined together. Are connected by a plurality of second connecting members 17 each including a nut 14b and a bolt 15b.

ヨーク部１０は、十字軸式の自在継手１８ａを構成するもので、１対のアーム部１９からなる。図示の例では、フランジ付軸部材２０の軸方向一方側の端部に、二股状のヨーク２１を結合固定することにより、ヨーク部１０を有する第１継手部材１１を構成している。 The yoke part 10 constitutes a cross-shaft type universal joint 18 a, and includes a pair of arm parts 19. In the illustrated example, the first joint member 11 having the yoke portion 10 is configured by connecting and fixing a forked yoke 21 to one axial end of the flanged shaft member 20.

フランジ付軸部材２０は、軸方向一方側の端部外周面に雄セレーション部２２を有する軸部２３と、該軸部２３の軸方向他方側の端部から径方向外方に突出した結合フランジ部２４とを備える。結合フランジ部２４は、円周方向複数箇所（図示の例では２箇所）に、第１結合孔２５を有する。 The flanged shaft member 20 includes a shaft portion 23 having a male serration portion 22 on the outer peripheral surface at one end in the axial direction, and a coupling flange projecting radially outward from the other axial end of the shaft portion 23. Unit 24. The coupling flange portion 24 has first coupling holes 25 at a plurality of locations (two locations in the illustrated example) in the circumferential direction.

ヨーク２１は、円環状で、内周面に雌セレーション部２６を有する基部２７と、該基部２７の径方向反対側２箇所に軸方向一方側に向けて延出する１対のアーム部１９を有する。１対のアーム部１９は、互いに同軸の円孔２８を有する。 The yoke 21 has an annular base 27 having a female serration 26 on the inner peripheral surface, and a pair of arms 19 extending toward one side in the axial direction at two locations on the radially opposite side of the base 27. Have. The pair of arm portions 19 have circular holes 28 coaxial with each other.

フランジ付軸部材２０とヨーク２１とは、雄セレーション部２２を雌セレーション部２６に係合させ、かつ、軸部２３と基部２７とを互いに溶接することにより結合固定されて、第１継手部材１１を構成している。 The flanged shaft member 20 and the yoke 21 are joined and fixed by engaging the male serration portion 22 with the female serration portion 26 and welding the shaft portion 23 and the base 27 together. Is composed.

なお、自在継手１８ａは、１対のアーム部１９の円孔２８と、他のヨーク２９ａを構成する１対のアーム部３０ａの円孔３１ａとに、カップ軸受３２ａを介して、十字軸３３ａの軸部を回転自在に支持してなる。なお、ヨーク２９ａの基部３４ａには、図示しない第１トルク伝達軸の端部が、トルクの伝達を可能に結合される。 In addition, the universal joint 18a is connected to the circular hole 28 of the pair of arm portions 19 and the circular hole 31a of the pair of arm portions 30a constituting the other yoke 29a via the cup bearing 32a. The shaft is rotatably supported. An end of a first torque transmission shaft (not shown) is coupled to the base 34a of the yoke 29a so as to transmit torque.

第１継手部材１１と弾性部材１３とを結合するために、第１結合部材１６のボルト１５ａの軸部３９ａを、円形板状の第１抑え板３６に形成された通孔３７ａと、弾性部材１３に形成された第１通孔３８とに挿通し、かつ、ナット１４ａの円筒部３５ａを、第１継手部材１１の第１結合孔２５に挿通している。そして、ボルト１５ａの軸部３９ａの先端部に形成された雄ねじ部を、ナット１４ａの円筒部３５ａの内周面に形成された雌ねじ部に螺合しさらに締め付けている。これにより、第１継手部材１１、弾性部材１３および第１抑え板３６を、ボルト１５ａの頭部４１ａと、ナット１４ａの円筒部３５ａの軸方向他方側の端部から径方向外方に突出した抑えフランジ部４０ａとの間で挟持することで、第１継手部材１１と弾性部材１３とを結合している。 In order to couple the first joint member 11 and the elastic member 13, the shaft portion 39 a of the bolt 15 a of the first coupling member 16 is connected to a through hole 37 a formed in a circular plate-shaped first holding plate 36, 13, and the cylindrical portion 35 a of the nut 14 a is inserted into the first coupling hole 25 of the first joint member 11. Then, the male screw formed at the tip of the shaft 39a of the bolt 15a is screwed into the female screw formed on the inner peripheral surface of the cylindrical portion 35a of the nut 14a and further tightened. As a result, the first joint member 11, the elastic member 13, and the first holding plate 36 protrude radially outward from the other end in the axial direction of the head portion 41a of the bolt 15a and the cylindrical portion 35a of the nut 14a. The first joint member 11 and the elastic member 13 are connected by being sandwiched between the holding flange 40a.

第２継手部材１２は、十字軸３３ｂおよび他のヨーク２９ｂと組み合わせることにより、十字軸式の自在継手１８ｂを構成するヨークである。すなわち、第２継手部材１２は、先端部に互いに同軸の円孔４２を有する１対のアーム部４３と、該１対のアーム部４３の基端部同士を連結する基部４４とを備える。基部４４は、円周方向複数箇所（図示の例では２箇所）に、第２結合孔４５を有する。 The 2nd joint member 12 is a yoke which comprises the cross shaft type universal joint 18b by combining with the cross shaft 33b and another yoke 29b. That is, the second joint member 12 includes a pair of arm portions 43 each having a coaxial circular hole 42 at a distal end portion, and a base portion 44 connecting base ends of the pair of arm portions 43 to each other. The base 44 has second coupling holes 45 at a plurality of locations (two locations in the illustrated example) in the circumferential direction.

自在継手１８ｂは、１対のアーム部４３の円孔４２と、他のヨーク２９ｂを構成する１対のアーム部３０ｂの円孔３１ｂとに、カップ軸受３２ｂを介して、十字軸３３ｂの軸部を回転自在に支持してなる。なお、ヨーク２９ｂの基部３４ｂには、図示しない第２トルク伝達軸の端部が、トルクの伝達を可能に結合される。 The universal joint 18b is provided between the circular hole 42 of the pair of arm portions 43 and the circular hole 31b of the pair of arm portions 30b forming the other yoke 29b via the cup bearing 32b. Is rotatably supported. An end of a second torque transmission shaft (not shown) is coupled to the base 34b of the yoke 29b so as to transmit torque.

第２継手部材１２と弾性部材１３とを結合するために、第２結合部材１７のボルト１５ｂの軸部３９ｂを、円形板状の第２抑え板４６に形成された通孔３７ｂと、弾性部材１３に形成された第２通孔４７とに挿通し、かつ、ナット１４ｂの円筒部３５ｂを、第２継手部材１２の第２結合孔４５に挿通している。そして、ボルト１５ｂの軸部３９ｂの先端部に形成された雄ねじ部を、ナット１４ｂの円筒部３５ｂの内周面に形成された雌ねじ部に螺合しさらに締め付けている。これにより、第２継手部材１２、弾性部材１３および第２抑え板４６を、ナット１４ｂの円筒部３５ｂの軸方向一方側の端部から径方向外方に突出した抑えフランジ部４０ｂと、ボルト１５ｂの頭部４１ｂとの間で挟持することで、第２継手部材１２と弾性部材１３とを結合している。 In order to couple the second joint member 12 and the elastic member 13, the shaft 39 b of the bolt 15 b of the second coupling member 17 is connected to a through hole 37 b formed in the circular plate-shaped second holding plate 46, 13 and the cylindrical portion 35b of the nut 14b is inserted into the second coupling hole 45 of the second joint member 12. The male screw formed at the tip of the shaft 39b of the bolt 15b is screwed into the female screw formed on the inner peripheral surface of the cylindrical portion 35b of the nut 14b and further tightened. Thereby, the second joint member 12, the elastic member 13, and the second holding plate 46 are formed by pressing the holding flange 40b projecting radially outward from one axial end of the cylindrical portion 35b of the nut 14b, and the bolt 15b. The second joint member 12 and the elastic member 13 are connected to each other by being sandwiched between the head 41b and the second joint member 12.

以上のような構成により、弾性継手９は、それぞれの中心軸が互いに傾斜した第１トルク伝達軸と第２トルク伝達軸とを、振動の伝達を防止しつつ、トルクの伝達を可能に接続している。 With the configuration as described above, the elastic joint 9 connects the first torque transmission shaft and the second torque transmission shaft whose respective central axes are inclined to each other so as to transmit torque while preventing transmission of vibration. ing.

ところで、ステアリング装置においては、ステアリングホイールの操作に要するトルク変動を抑えつつ、エンジンや変速機などの周囲に配置される他の部品との関係を考慮して、弾性継手９の両側に配置される第１トルク伝達軸と第２トルク伝達軸との交差角度、すなわち、路面に平行な第１仮想平面内における交差角度、および、車体の幅方向に直交する第２仮想平面内における交差角度が決定される。 By the way, in the steering device, it is arranged on both sides of the elastic joint 9 in consideration of the relationship with other components arranged around the engine and the transmission while suppressing the torque fluctuation required for operating the steering wheel. An intersection angle between the first torque transmission axis and the second torque transmission axis, that is, an intersection angle in a first virtual plane parallel to the road surface and an intersection angle in a second virtual plane orthogonal to the width direction of the vehicle body are determined. Is done.

先発明構造においては、第１継手部材１１の中心軸および第１トルク伝達軸の中心軸を含む仮想平面内における第１継手部材１１と第１トルク伝達軸との交差角度、並びに、第２継手部材１２の中心軸および第２トルク伝達軸の中心軸を含む仮想平面内における第２継手部材１２と第２トルク伝達軸との交差角度に加え、フランジ付軸部材２０に対するヨーク２１（ヨーク部１０）の円周方向の取り付け位相を調節することにより、第１トルク伝達軸と第２トルク伝達軸との第１仮想平面内における交差角度および第２仮想平面内における交差角度を調節することができる。 In the prior invention structure, the intersection angle between the first joint member 11 and the first torque transmission shaft in an imaginary plane including the center axis of the first joint member 11 and the center axis of the first torque transmission shaft, and the second joint In addition to the intersection angle between the second joint member 12 and the second torque transmission shaft in an imaginary plane including the central axis of the member 12 and the central axis of the second torque transmission shaft, the yoke 21 (the yoke portion 10 By adjusting the mounting phase in the circumferential direction of (1), the intersection angle between the first torque transmission axis and the second torque transmission axis in the first virtual plane and the intersection angle in the second virtual plane can be adjusted. .

ただし、先発明構造では、フランジ付軸部材２０とヨーク２１とを溶接により固定しているため、第１トルク伝達軸と第２トルク伝達軸との第１仮想平面内における交差角度および第２仮想平面内における交差角度の違いに応じて、第１継手部材１１として、フランジ付軸部材２０に対するヨーク２１の円周方向の取り付け位相が異なる複数種類のものを用意する必要があり、部品管理が面倒になって、コストが嵩むといった問題を生じる。 However, in the prior invention structure, since the flanged shaft member 20 and the yoke 21 are fixed by welding, the intersection angle of the first torque transmission shaft and the second torque transmission shaft in the first virtual plane and the second virtual It is necessary to prepare a plurality of types of first joint members 11 having different mounting phases in the circumferential direction of the yoke 21 with respect to the flanged shaft member 20 according to the difference in the crossing angle in the plane, which makes component management troublesome. And the problem that the cost increases.

本発明は、上述のような事情に鑑みて、第１継手部材のフランジ付軸部材に対するヨーク部の円周方向に関する位相の調節を容易に行うことができる、弾性継手の構造を実現することを目的としている。 The present invention has been made in view of the above-described circumstances, and provides a structure of an elastic joint capable of easily adjusting a phase of a yoke portion in a circumferential direction with respect to a flanged shaft member of a first joint member. The purpose is.

本発明の第１態様および第２態様の弾性継手のいずれも、弾性部材と、第１継手部材と、第２継手部材と、第１結合部材と、第２結合部材とを備える。なお、本発明の第１態様と第２態様との違いは、第１継手部材の構成にある。弾性部材、第２継手部材、第１結合部材および第２結合部材の構成は、本発明の第１態様と第２態様とで同じである。 Each of the elastic joints according to the first and second aspects of the present invention includes an elastic member, a first joint member, a second joint member, a first joint member, and a second joint member. Note that the difference between the first aspect and the second aspect of the present invention lies in the configuration of the first joint member. The configurations of the elastic member, the second joint member, the first coupling member, and the second coupling member are the same in the first embodiment and the second embodiment of the present invention.

前記弾性部材は、円周方向複数箇所に形成された第１通孔と、該第１通孔から円周方向に外れた円周方向複数箇所に形成された第２通孔とを有する。 The elastic member has first through holes formed at a plurality of locations in the circumferential direction, and second through holes formed at a plurality of locations in the circumferential direction deviating in the circumferential direction from the first through holes.

本発明の第１態様においては、前記第１継手部材は、フランジ付軸部材と、ヨークと、締付部材とを有する。
前記フランジ付軸部材は、軸方向一方側の端部外周面に雄セレーション部を有する軸部と、該軸部の軸方向他方側の端部から径方向外方に突出した結合フランジ部とを含み、前記結合フランジ部は、円周方向複数箇所に第１結合孔を有する。
前記ヨークは、クランプ部と、ヨーク部とを含む。
前記クランプ部は、内周面に前記雄セレーション部と係合する雌セレーション部を有し、かつ、円周方向１箇所に形成されたスリットを有する筒状部と、前記スリットを挟んだ両側に配置され、かつ、互いに整合する部分に締付孔を有する１対のフランジ部とからなる。
前記ヨーク部は、前記筒状部の軸方向一方側の端部の径方向反対側２箇所から延出した１対のアーム部からなる。
前記締付部材は、前記締付孔に挿通または螺合される。 In a first aspect of the present invention, the first joint member has a flanged shaft member, a yoke, and a fastening member.
The flanged shaft member includes a shaft portion having a male serration portion on the outer peripheral surface at one end in the axial direction, and a coupling flange portion protruding radially outward from the other axial end portion of the shaft portion. The coupling flange portion includes first coupling holes at a plurality of positions in a circumferential direction.
The yoke includes a clamp part and a yoke part.
The clamp portion has a female serration portion that engages with the male serration portion on the inner peripheral surface, and a cylindrical portion having a slit formed at one location in the circumferential direction, and on both sides sandwiching the slit. It comprises a pair of flanges which are arranged and have a fastening hole at a part aligned with each other.
The yoke portion includes a pair of arm portions extending from two radially opposite ends of one end in the axial direction of the cylindrical portion.
The fastening member is inserted or screwed into the fastening hole.

本発明の第２態様においては、前記第１継手部材は、フランジ付軸部材と、ヨーク付軸部材と、クランプ部材と、締付部材とを有する。
前記フランジ付軸部材は、本発明の第１態様のフランジ付軸部材と同じ構成を有する。すなわち、前記フランジ付軸部材は、軸方向一方側の端部外周面に第１セレーション部を有する第１軸部と、該第１軸部の軸方向他方側の端部から径方向外方に突出した結合フランジ部とを含み、前記結合フランジ部は、円周方向複数箇所に第１結合孔を有する。
前記ヨーク付軸部材は、軸方向他方側の端部外周面に第２雄セレーション部を有する第２軸部と、該第２軸部の軸方向一方側の端部の径方向反対側２箇所から延出した１対のアーム部からなるヨーク部とを含む。
前記クランプ部材は、内周面に、前記第１雄セレーション部および前記第２雄セレーション部と係合する雌セレーション部を有し、かつ、円周方向１箇所に形成されたスリットを有する筒状部と、前記スリットを挟んだ両側に配置され、かつ、互いに整合する部分に締付孔を有する１対のフランジ部とからなるクランプ部を含む。
前記締付部材は、本発明の第１態様の締付部材と同じ構成を有する。すなわち、前記締付部材は、前記締付孔に挿通または螺合される。 In a second aspect of the present invention, the first joint member includes a shaft member with a flange, a shaft member with a yoke, a clamp member, and a tightening member.
The flanged shaft member has the same configuration as the flanged shaft member of the first aspect of the present invention. That is, the flanged shaft member includes a first shaft portion having a first serration portion on an outer peripheral surface at one end in the axial direction, and a radially outward portion from the other axial end of the first shaft portion. A protruding coupling flange portion, wherein the coupling flange portion has first coupling holes at a plurality of circumferential positions.
The shaft member with a yoke includes a second shaft portion having a second male serration portion on an outer peripheral surface of an end portion on the other side in the axial direction, and two radially opposite ends of one end in the axial direction of the second shaft portion. And a yoke portion composed of a pair of arm portions extending from the arm.
The clamp member has a female serration on its inner peripheral surface that engages with the first male serration and the second male serration, and has a slit formed at one location in the circumferential direction. And a pair of flange portions arranged on both sides of the slit and having a fastening hole at a portion aligned with each other.
The fastening member has the same configuration as the fastening member of the first aspect of the present invention. That is, the fastening member is inserted or screwed into the fastening hole.

前記第２継手部材は、円周方向複数箇所に第２結合孔を有する。 The second joint member has second coupling holes at a plurality of positions in the circumferential direction.

前記第１結合部材は、前記第１通孔および前記第１結合孔に挿通または螺合されて、前記弾性部材と前記第１継手部材とを結合する。 The first coupling member is inserted or screwed into the first through-hole and the first coupling hole, and couples the elastic member and the first joint member.

前記第２結合部材は、前記第２通孔および前記第２結合孔に挿通または螺合されて、前記弾性部材と前記第２継手部材とを結合する。 The second coupling member is inserted or screwed into the second through-hole and the second coupling hole to couple the elastic member and the second joint member.

本発明の第２態様においては、前記ヨーク付軸部材を、外周面に、前記第２雄セレーション部を有する前記第２軸部を含む軸部材と、前記第２軸部の軸方向一方側の端部に外嵌固定された基部、および、該基部の径方向反対側２箇所から延出した前記１対のアーム部からなる前記ヨーク部を含むヨークとを備えるものとすることができる。 In a second aspect of the present invention, the shaft member with a yoke is provided on the outer peripheral surface, the shaft member including the second shaft portion having the second male serration portion, and a shaft member on one axial side of the second shaft portion. A base may be externally fitted and fixed to the end, and a yoke including the yoke including the pair of arms extending from two radially opposite sides of the base.

前記雌セレーション部のモジュールを０．１以上０．４以下、好ましくは０．２以上０．３以下とし、かつ、歯数を、３０以上１２０以下、好ましくは５０以上１００以下とすることができる。なお、前記雌セレーション部と係合する雄セレーション部、すなわち、第１態様における前記雄セレーション部、第２態様における前記第１雄セレーション部および前記第２雄セレーション部は、前記雌セレーション部のモジュールおよび歯数と同じモジュールおよび歯数を有する。 The module of the female serration portion can be 0.1 to 0.4, preferably 0.2 to 0.3, and the number of teeth can be 30 to 120, preferably 50 to 100. . The male serrations that engage with the female serrations, ie, the male serrations in the first aspect, the first male serrations and the second male serrations in the second aspect, are modules of the female serrations. And the same number of modules and teeth as the number of teeth.

前記締付部材を、シャーボルトあるいはヘクスローブボルトとすることができる。 The fastening member may be a shear bolt or a hex lobe bolt.

本発明の弾性継手によれば、第１継手部材のフランジ付軸部材に対するヨーク部の円周方向に関する位相の調節を容易に行うことができる。 According to the elastic joint of the present invention, it is possible to easily adjust the phase in the circumferential direction of the yoke with respect to the flanged shaft member of the first joint member.

図１は、本発明の実施の形態の第１例に係る弾性継手を示す側面図である。FIG. 1 is a side view showing an elastic joint according to a first example of an embodiment of the present invention. 図２（Ａ）は、本発明の実施の形態の第１例について、第１継手部材を取り出して示す側面図であり、図２（Ｂ）は、図２（Ａ）のＸ−Ｘ断面図である。FIG. 2A is a side view of a first example of an embodiment of the present invention in which a first joint member is taken out, and FIG. 2B is a cross-sectional view taken along line XX of FIG. 2A. It is. 図３は、本発明の実施の形態の第１例について、第１継手部材を取り出して示す分解側面図である。FIG. 3 is an exploded side view showing the first joint member in the first example of the embodiment of the present invention. 図４は、図３のＹ−Ｙ断面図である。FIG. 4 is a sectional view taken along line YY of FIG. 図５は、本発明の実施の形態の第１例について、第１継手部材のフランジ付軸部材を取り出して、図３の右側から見た端面図である。FIG. 5 is an end view of the first example of the embodiment of the present invention, in which the flanged shaft member of the first joint member is taken out and viewed from the right side in FIG. 3. 図６（Ａ）は、本発明の実施の形態の第１例について、１対の締付孔に締め付ける以前の締付部材を取り出して示す側面図であり、図６（Ｂ）は、図６（Ａ）の左側から見た端面図である。FIG. 6A is a side view of a first example of an embodiment of the present invention, in which a fastening member before being fastened to a pair of fastening holes is taken out and shown. FIG. 6B is a side view of FIG. It is the end elevation seen from the left of (A). 図７（Ａ）は、軸方向長さが短い第１継手部材を示す側面図であり、図７（Ｂ）は、軸方向長さが長い第１継手部材を示す側面図である。FIG. 7A is a side view showing a first joint member having a short axial length, and FIG. 7B is a side view showing a first joint member having a long axial length. 図８は、本発明の実施の形態の第２例について、第１継手部材を取り出して示す部分切断側面図である。FIG. 8 is a partially cut-away side view showing the first joint member in the second example of the embodiment of the present invention. 図９は、本発明の実施の形態の第２例について、第１継手部材を分解して示す部分切断側面図である。FIG. 9 is a partially cut-away side view showing a first joint member in an exploded manner in a second example of the embodiment of the present invention. 図１０は、図９のＺ−Ｚ断面図である。FIG. 10 is a sectional view taken along the line ZZ of FIG. 図１１は、ステアリング装置の従来構造の１例を示す部分切断側面図である。FIG. 11 is a partially cut-away side view showing an example of a conventional structure of a steering device. 図１２は、先発明に係る弾性継手を示す側面図である。FIG. 12 is a side view showing the elastic joint according to the prior invention. 図１３は、先発明に係る弾性継手の斜視図である。FIG. 13 is a perspective view of the elastic joint according to the invention. 図１４は、先発明に係る弾性継手の分解斜視図である。FIG. 14 is an exploded perspective view of the elastic joint according to the prior invention. 図１５（Ａ）は、先発明に係る弾性継手の第１継手部材を取り出して示す断面図であり、図１５（Ｂ）は、図１５（Ａ）の右方から見た端面図である。FIG. 15A is a cross-sectional view showing the first joint member of the elastic joint according to the invention, and FIG. 15B is an end view as viewed from the right side of FIG.

［実施の形態の第１例］
図１〜図６（Ｂ）は、本発明の実施の形態の第１例を示している。なお、本例を含め、本発明の弾性継手の特徴は、第１継手部材１１ａのフランジ付軸部材２０に対してヨーク部５４を、クランプ部５３を介して結合する構造にある。第２継手部材１２、弾性部材１３、第１結合部材１６および第２結合部材１７の構成、並びに、第１継手部材１１ａと弾性部材１３とを第１結合部材１６により結合する構造、および、第２継手部材１２と弾性部材１３とを第２結合部材１７により結合する構造については、図１２〜図１５（Ｂ）に示した先発明に係る弾性継手９と基本的に同じである。そこで、以下では、第１継手部材１１の構成以外については、図１２〜図１４も参照しつつ、説明する。 [First Example of Embodiment]
1 to 6B show a first example of an embodiment of the present invention. A feature of the elastic joint of the present invention including this example is a structure in which the yoke portion 54 is coupled to the flanged shaft member 20 of the first joint member 11a via the clamp portion 53. The structure of the second joint member 12, the elastic member 13, the first joint member 16 and the second joint member 17, the structure in which the first joint member 11a and the elastic member 13 are joined by the first joint member 16, and The structure in which the two joint members 12 and the elastic member 13 are connected by the second connecting member 17 is basically the same as the elastic joint 9 according to the prior invention shown in FIGS. 12 to 15B. Therefore, hereinafter, the configuration other than the configuration of the first joint member 11 will be described with reference to FIGS. 12 to 14.

すなわち、本例の弾性継手９ａは、弾性部材１３と、第１継手部材１１ａと、第２継手部材１２と、第１抑え板３６と、第２抑え板４６と、複数本ずつの第１結合部材１６および第２結合部材１７とを備える。 That is, the elastic joint 9a of the present embodiment includes the elastic member 13, the first joint member 11a, the second joint member 12, the first holding plate 36, the second holding plate 46, and a plurality of first joints. A member 16 and a second coupling member 17 are provided.

弾性部材１３（図１および図１４参照）は、ゴムの如きエラストマーなどの弾性材製で、略円板形状を有する。弾性部材１３は、円周方向複数箇所（図示の例では２箇所）に第１通孔３８を有し、かつ、これら第１通孔３８から円周方向に外れた円周方向複数箇所（図示の例では２箇所）に第２通孔４７を有する。 The elastic member 13 (see FIGS. 1 and 14) is made of an elastic material such as an elastomer such as rubber and has a substantially disc shape. The elastic member 13 has first through holes 38 at a plurality of positions (two positions in the illustrated example) in the circumferential direction, and a plurality of positions in the circumferential direction deviated from the first through holes 38 in the circumferential direction (shown in the drawing). The second through hole 47 is provided at two places in the example of (1).

本例では、弾性部材１３は、軸方向一方側（図１および図１４の右側）の側面の径方向反対側２箇所に凸部４９ｂを有し、かつ、軸方向他方側（図１および図１４の左側）の側面のうち、円周方向に関する位相が凸部４９ｂから９０度ずれた径方向反対側２箇所に凸部４９ａを有する。第１通孔３８は、弾性部材１３のうち、凸部４９ｂが形成された部分を軸方向に貫通するように形成されている。換言すれば、第１通孔３８の軸方向一方側部分を、凸部４９ｂの内周面により構成している。第２通孔４７は、弾性部材１３のうち、凸部４９ａが形成された部分を軸方向に貫通するように形成されている。換言すれば、第２通孔４７の軸方向他方側部分を、凸部４９ａの内周面により構成している。凸部４９ａ、４９ｂはいずれも、円筒面である外周面を有する。要するに、凸部４９ａ、４９ｂは、円筒形状を有する。 In this example, the elastic member 13 has the protrusions 49b at two radially opposite sides on one side in the axial direction (the right side in FIGS. 1 and 14) and the other side in the axial direction (see FIGS. 1 and 14). 14 (left side of 14), two convex portions 49a are provided at two positions on the opposite side in the radial direction whose phase in the circumferential direction is shifted by 90 degrees from the convex portion 49b. The first through hole 38 is formed so as to axially penetrate a portion of the elastic member 13 where the convex portion 49b is formed. In other words, one axial portion of the first through hole 38 is formed by the inner peripheral surface of the projection 49b. The second through hole 47 is formed so as to axially penetrate a portion of the elastic member 13 where the convex portion 49a is formed. In other words, the other axial portion of the second through hole 47 is formed by the inner peripheral surface of the projection 49a. Each of the protrusions 49a and 49b has an outer peripheral surface that is a cylindrical surface. In short, the protrusions 49a and 49b have a cylindrical shape.

第１継手部材１１ａは、フランジ付軸部材２０と、ヨーク５０と、締付部材５１とを備える。 The first joint member 11a includes a flanged shaft member 20, a yoke 50, and a fastening member 51.

フランジ付軸部材２０は、軸部２３と、該軸部２３の軸方向他方側の端部から径方向外方に突出した結合フランジ部２４とを備える。 The flanged shaft member 20 includes a shaft portion 23 and a coupling flange portion 24 that protrudes radially outward from the other axial end of the shaft portion 23.

軸部２３は、軸方向一方側の端部外周面に雄セレーション部２２を有する。本例では、雄セレーション部２２のモジュールを、０．１以上０．４以下、好ましくは０．２以上０．３以下とし、かつ、歯数を３０以上１２０以下、好ましくは５０以上１００以下としている。具体的には、例えば、雄セレーション部２２のモジュールを０．２５とし、かつ、歯数を７２とすることができる。 The shaft portion 23 has a male serration portion 22 on the outer peripheral surface on one end in the axial direction. In this example, the module of the male serration section 22 is set to 0.1 to 0.4, preferably 0.2 to 0.3, and the number of teeth is set to 30 to 120, preferably 50 to 100. I have. Specifically, for example, the module of the male serration unit 22 can be set to 0.25, and the number of teeth can be set to 72.

結合フランジ部２４は、円周方向複数箇所に第１結合孔２５を有する。本例では、結合フランジ部２４は、軸部２３の軸方向他方側の端部の径方向反対側２箇所から径方向外方に突出した１対のフランジ片５２により構成されている。第１結合孔２５は、フランジ片５２のそれぞれの径方向中間部を軸方向に貫通するように形成されている。 The coupling flange portion 24 has first coupling holes 25 at a plurality of positions in the circumferential direction. In the present example, the coupling flange portion 24 is constituted by a pair of flange pieces 52 projecting radially outward from two radially opposite ends of the other axial end of the shaft portion 23. The first coupling holes 25 are formed so as to penetrate through the respective radially intermediate portions of the flange pieces 52 in the axial direction.

ヨーク５０は、クランプ部５３と、ヨーク部５４とを備える。 The yoke 50 includes a clamp 53 and a yoke 54.

クランプ部５３は、筒状部５５と、１対の締付フランジ部５６ａ、５６ｂとを備える。 The clamp portion 53 includes a tubular portion 55 and a pair of tightening flange portions 56a and 56b.

筒状部５５は、内周面に雄セレーション部２２と係合する雌セレーション部５７を有し、かつ、円周方向１箇所に軸方向に伸長するスリット５８を有する。雌セレーション部５７は、モジュールを、雄セレーション部２２のモジュールと同じとし、かつ、歯数を、雄セレーション部２２の歯数と同じとしている。すなわち、雌セレーション部５７のモジュールを０．１以上０．４以下、好ましくは０．２以上０．３以下とし、かつ、歯数を３０以上１２０以下、好ましくは５０以上１００以下としている。また、本例では、スリット５８の軸方向両側の端部を、筒状部５５の軸方向両側の端面に開口させている。ただし、スリット５８の片側また両側の端部を、筒状部５５の軸方向端面に開口させないようにすることもできる。 The cylindrical portion 55 has a female serration portion 57 that engages with the male serration portion 22 on the inner peripheral surface, and has a slit 58 that extends in the axial direction at one location in the circumferential direction. The female serration portion 57 has the same module as the male serration portion 22 and the same number of teeth as the male serration portion 22. That is, the module of the female serration portion 57 is set to be 0.1 to 0.4, preferably 0.2 to 0.3, and the number of teeth is 30 to 120, preferably 50 to 100. Further, in the present example, both ends in the axial direction of the slit 58 are opened to both end surfaces in the axial direction of the tubular portion 55. However, one or both ends of the slit 58 may not be opened at the axial end surface of the tubular portion 55.

１対の締付フランジ部５６ａ、５６ｂは、スリット５８を挟む両側部分に配置されている。本例では、１対の締付フランジ部５６ａ、５６ｂは、筒状部５５のうち、スリット５８を挟む両側部分から径方向外方に突出し、かつ、互いに対向する内側面同士が略平行となるように配置されている。１対の締付フランジ部５６ａ、５６ｂは、互いに整合する部分に１対の締付孔５９ａ、５９ｂを有する。すなわち、１対の締付孔５９ａ、５９ｂは、これら締付孔５９ａ、５９ｂに締付部材５１を挿通または螺合する以前の状態で互いに略同軸となるように、かつ、締付フランジ部５６ａ、５６ｂのそれぞれを厚さ方向に貫通するように形成されている。すなわち、１対の締付孔５９ａ、５９ｂの中心軸は、筒状部５５の中心軸に対しねじれの位置に存在する。また、１対の締付孔５９ａ、５９ｂの形成位置は、後述するように、これら締付孔５９ａ、５９ｂに挿通または螺合された締付部材５１の軸部６０の軸方向中間部が、筒状部５５の内側に配置（内嵌）されたフランジ付軸部材２０の軸部２３の軸方向一方側の端部と干渉しないように規制されている。本例では、１対の締付フランジ部５６ａ、５６ｂのうちの一方の締付フランジ部５６ａに形成された締付孔５９ａを円孔とし、他方の締付フランジ部５６ｂに形成された締付孔５９ｂをねじ孔としている。 The pair of tightening flange portions 56a and 56b are disposed on both sides of the slit 58. In this example, the pair of tightening flange portions 56a and 56b protrude radially outward from both side portions of the cylindrical portion 55 that sandwich the slit 58, and the inner surfaces facing each other are substantially parallel. Are arranged as follows. The pair of tightening flange portions 56a and 56b have a pair of tightening holes 59a and 59b at portions where they are aligned with each other. That is, the pair of tightening holes 59a and 59b are substantially coaxial with each other before the tightening member 51 is inserted or screwed into the tightening holes 59a and 59b, and the tightening flange portion 56a , 56b in the thickness direction. That is, the central axis of the pair of tightening holes 59a and 59b is located at a position twisted with respect to the central axis of the tubular portion 55. Further, as described later, the position at which the pair of tightening holes 59a and 59b are formed is such that the axial intermediate portion of the shaft portion 60 of the tightening member 51 inserted or screwed into the tightening holes 59a and 59b is It is regulated so as not to interfere with one axial end of the shaft portion 23 of the flanged shaft member 20 arranged (fitted) inside the cylindrical portion 55. In this example, the tightening hole 59a formed in one tightening flange portion 56a of the pair of tightening flange portions 56a and 56b is a circular hole, and the tightening hole formed in the other tightening flange portion 56b is formed. The hole 59b is a screw hole.

ヨーク部５４は、１対のアーム部６１からなる。１対のアーム部６１は、筒状部５５の軸方向一方側の端部の径方向反対側２箇所から延出している。１対のアーム部６１のそれぞれは、先端部に、互いに同軸の円孔６２を有する。 The yoke part 54 includes a pair of arm parts 61. The pair of arm portions 61 extend from two radially opposite sides of one end in the axial direction of the cylindrical portion 55. Each of the pair of arm portions 61 has a circular hole 62 coaxial with each other at a distal end portion.

なお、本例では、ヨーク５０として、鋼板などの十分な強度および剛性を有する金属板に、プレスによる打ち抜き加工を施すことで中間素材を得た後、該中間素材に曲げ加工を施すことにより造られた、いわゆるプレスヨークを使用している。ただし、ヨーク５０として、金属材料に鍛造加工を施すことにより造られた、いわゆる鍛造ヨークを使用することもできる。 In the present example, as the yoke 50, a metal plate having sufficient strength and rigidity, such as a steel plate, is punched by a press to obtain an intermediate material, and then the intermediate material is subjected to a bending process. So-called press yoke is used. However, as the yoke 50, a so-called forged yoke made by forging a metal material can be used.

締付部材５１は、フランジ付軸部材２０とヨーク５０とを結合固定するためのものである。すなわち、フランジ付軸部材２０の軸部２３の軸方向一方側の端部にヨーク５０の筒状部５５を外嵌し、かつ、雄セレーション部２２と雌セレーション部５７とを係合させた状態で、締付部材５１の軸部６０の基端部（図２（Ｂ）の左側の端部）を締付孔５９ａに挿通し、かつ、軸部６０の先端部（図２（Ｂ）の右側の端部）を締付孔５９ｂに螺合しさらに締め付けている。これにより、１対の締付フランジ部５６ａ、５６ｂの内側面同士の間隔を縮め、筒状部５５の内径を縮経させることで、ヨーク５０のクランプ部５３をフランジ付軸部材２０の軸部２３に外嵌固定（クランプ）して、第１継手部材１１ａを構成している。 The fastening member 51 is for connecting and fixing the flanged shaft member 20 and the yoke 50. That is, a state in which the cylindrical portion 55 of the yoke 50 is externally fitted to one axial end of the shaft portion 23 of the flanged shaft member 20 and the male serration portion 22 and the female serration portion 57 are engaged. Then, the base end (the left end in FIG. 2B) of the shaft portion 60 of the fastening member 51 is inserted into the fastening hole 59a, and the distal end portion of the shaft portion 60 (see FIG. 2B). The right end) is screwed into the tightening hole 59b and further tightened. As a result, the gap between the inner surfaces of the pair of tightening flange portions 56a and 56b is reduced, and the inner diameter of the cylindrical portion 55 is reduced, so that the clamp portion 53 of the yoke 50 is connected to the shaft portion of the flanged shaft member 20. The first joint member 11a is fixed to the outside 23 by clamping (clamping).

本例では、締付部材５１として、頭部６３の軸方向中間部に全周にわたりくびれ部６４を有するシャーボルトを使用している。すなわち、締付部材５１の軸部６０の先端部を締付孔５９ｂに螺合しさらに締め付けることにより、締付部材５１の頭部６３にねじれ方向に所定値以上のトルクが加わると、頭部６３がくびれ部６４で剪断される。この結果、軸部６０側に部分円すい台状のかさ部６５を残して、レンチなどの工具を係合させるための工具係合部６６が分離される。これにより、フランジ付軸部材２０とヨーク５０とを結合した状態で、これらフランジ付軸部材２０とヨーク５０とを容易には分解できないようにしている。 In this example, as the fastening member 51, a shear bolt having a constricted portion 64 over the entire periphery at the axially intermediate portion of the head portion 63 is used. That is, by screwing the tip end of the shaft portion 60 of the fastening member 51 into the fastening hole 59b and further tightening, when a torque equal to or more than a predetermined value is applied to the head 63 of the fastening member 51 in the twisting direction, the head 63 is sheared at the constriction 64. As a result, the tool engaging portion 66 for engaging a tool such as a wrench is separated, leaving a partially truncated cone-shaped bulk portion 65 on the shaft portion 60 side. This prevents the flanged shaft member 20 and the yoke 50 from being easily disassembled in a state where the flanged shaft member 20 and the yoke 50 are connected.

なお、締付部材５１として、シャーボルトの代わりに、ヘクスローブ（トルクス：登録商標）ボルトなど、特殊な工具を使用しなければ、締め付けたり緩めたりすることができないものを使用することで、フランジ付軸部材２０とヨーク５０とを容易には分解できないようにすることもできる。あるいは、締付部材５１として、通常のボルト（六角ボルト）やねじ（プラスねじまたはマイナスねじ）などを使用することもできる。 It should be noted that, instead of the shear bolt, a member that cannot be tightened or loosened unless a special tool is used, such as a hex lobe (Torx: registered trademark) bolt, is used as the fastening member 51. The shaft member 20 and the yoke 50 may not be easily disassembled. Alternatively, a normal bolt (hexagon bolt) or a screw (plus screw or minus screw) can be used as the fastening member 51.

１対の締付孔５９ａ、５９ｂをいずれも円孔とし、締付部材５１の軸部６０をこれら締付孔５９ａ、５９ｂに挿通し、かつ、軸部６０の先端部にナットを螺合しさらに締め付けるように構成することもできる。この場合も、締付部材５１として、シャーボルトやヘクスローブボルトを使用して、フランジ付軸部材２０とヨーク５０とを容易には分解できないようにすることもできるし、通常のボルトやねじなどを使用することもできる。 Each of the pair of tightening holes 59a and 59b is a circular hole, the shaft portion 60 of the tightening member 51 is inserted through the tightening holes 59a and 59b, and a nut is screwed into the tip of the shaft portion 60. It is also possible to configure to further tighten. Also in this case, a shear bolt or a hex lobe bolt can be used as the fastening member 51 so that the flanged shaft member 20 and the yoke 50 cannot be easily disassembled, or a normal bolt, screw, or the like can be used. Can also be used.

第２継手部材１２（図１および図１４参照）は、円周方向複数箇所に第２結合孔４５を有する。本例では、第２継手部材１２は、十字軸式自在継手を構成するヨークである。すなわち、第２継手部材１２は、先端部に互いに同軸の円孔４２を有する１対のアーム部４３と、該１対のアーム部４３の基端部同士を連結する基部４４とを備える。基部４４は、１対のアーム部４３の幅方向に関する片端部同士および他端部同士を連結する１対の連結板部６７により構成されている。第２結合孔４５は、１対の連結板部６７のそれぞれに形成されている。 The second joint member 12 (see FIGS. 1 and 14) has second coupling holes 45 at a plurality of positions in the circumferential direction. In this example, the second joint member 12 is a yoke constituting a cross-shaft universal joint. That is, the second joint member 12 includes a pair of arm portions 43 each having a coaxial circular hole 42 at a distal end portion, and a base portion 44 connecting base ends of the pair of arm portions 43 to each other. The base 44 includes a pair of connecting plates 67 that connect one end and the other end of the pair of arms 43 in the width direction. The second coupling hole 45 is formed in each of the pair of connecting plate portions 67.

本例では、第２継手部材１２は、鋼板などの十分な強度および剛性を有する金属板に、プレスによる打ち抜き加工を施すことで中間素材を得た後、該中間素材に曲げ加工を施すことにより造られている。ただし、第２継手部材１２として、先発明構造の第１継手部材１１のように、フランジ付軸部材とヨークとを溶接により結合したものを使用することもできるし、本例の第１継手部材１１ａのように、フランジ付軸部材とヨークとを締付部材により結合固定したものを使用することもできる。 In this example, the second joint member 12 is obtained by performing a punching process on a metal plate having sufficient strength and rigidity, such as a steel plate, by stamping with a press, and then performing a bending process on the intermediate material. Is being built. However, as the second joint member 12, a member in which a flanged shaft member and a yoke are joined by welding, like the first joint member 11 of the prior invention structure, can be used, and the first joint member of the present example. As shown in FIG. 11a, a shaft member with a flange and a yoke which are connected and fixed by a fastening member can also be used.

第１抑え板３６は、鋼板もしくはアルミニウム系合金などの軽合金板などの金属板製または合成樹脂製で、円板形状を有する。第１抑え板３６は、径方向反対側２箇所に通孔３７ａを有し、かつ、円周方向に関する位相が通孔３７ａから９０度ずれた径方向反対側２箇所に切り欠き部６８ａを有する。切り欠き部６８ａのそれぞれは、軸方向から見て円形の輪郭形状を有し、かつ、その一部が、第１抑え板３６の外周面に開口している。第１抑え板３６は、切り欠き部６８ａの内側に凸部４９ａを配置することにより、弾性部材１３の軸方向一方側に重ね合わされ、かつ、弾性部材１３に対し支持される。この状態で、第１抑え板３６の通孔３７ａは、弾性部材１３の第１通孔３８と整合する（同軸に配置される）。 The first pressing plate 36 is made of a metal plate such as a steel plate or a light alloy plate such as an aluminum alloy or a synthetic resin, and has a disk shape. The first pressing plate 36 has through holes 37a at two positions on the opposite side in the radial direction, and has notches 68a at two positions on the opposite side in the radial direction whose phase in the circumferential direction is shifted from the through hole 37a by 90 degrees. . Each of the notches 68a has a circular contour when viewed from the axial direction, and a part thereof is open to the outer peripheral surface of the first holding plate 36. By arranging the convex portion 49a inside the notch portion 68a, the first pressing plate 36 is superimposed on one axial side of the elastic member 13 and supported by the elastic member 13. In this state, the through hole 37a of the first holding plate 36 is aligned with the first through hole 38 of the elastic member 13 (located coaxially).

第２抑え板４６は、鋼板もしくはアルミニウム系合金などの軽合金板などの金属板製または合成樹脂製で、第１抑え板３６と同一の形状を有する。すなわち、第２抑え板４６は、径方向反対側２箇所に通孔３７ｂを有し、かつ、円周方向に関する位相が通孔３７ｂから９０度ずれた径方向反対側２箇所に切り欠き部６８ｂを有する。切り欠き部６８ｂのそれぞれは、軸方向から見て円形の輪郭形状を有し、かつ、その一部が、第２抑え板４６の外周面に開口している。第２抑え板４６は、切り欠き部６８ｂの内側に凸部４９ｂを配置することにより、弾性部材１３の軸方向他方側に重ね合わされ、かつ、弾性部材１３に対し支持される。この状態で、第２抑え板４６の通孔３７ｂは、弾性部材１３の第２通孔４７と整合する（同軸に配置される）。 The second pressing plate 46 is made of a metal plate such as a steel plate or a light alloy plate such as an aluminum alloy or a synthetic resin, and has the same shape as the first pressing plate 36. That is, the second pressing plate 46 has the through holes 37b at two locations on the radially opposite side, and the notches 68b at the two radially opposite sides whose phases in the circumferential direction are shifted by 90 degrees from the through holes 37b. Having. Each of the notches 68b has a circular contour shape when viewed from the axial direction, and a part thereof is open to the outer peripheral surface of the second holding plate 46. The second pressing plate 46 is overlapped on the other axial side of the elastic member 13 and is supported by the elastic member 13 by arranging the convex portion 49b inside the notch 68b. In this state, the through hole 37b of the second holding plate 46 is aligned with the second through hole 47 of the elastic member 13 (located coaxially).

第１結合部材１６は、弾性部材１３と第１継手部材１１ａとを結合するためのものである。本例では、第１結合部材１６のそれぞれは、ナット１４ａとボルト１５ａとを備える。ナット１４ａは、内周面に雌ねじ部を有する円筒部３５ａと、該円筒部３５ａの端部から径方向外方に突出した抑えフランジ部４０ａとを備える。弾性部材１３と第１継手部材１１ａとを結合する際には、まず、ナット１４ａの円筒部３５ａを、第１継手部材１１ａの第１結合孔２５に軸方向一方側から挿入する。次いで、ボルト１５ａの軸部３９ａを、第１抑え板３６の通孔３７ａと弾性部材１３の第１通孔３８とに軸方向他方側から挿入し、かつ、軸部３９ａの先端部に形成された雄ねじ部を、円筒部３５ａの内周面に形成された雌ねじ部に螺合しさらに締め付ける。これにより、第１継手部材１１ａ、弾性部材１３および第１抑え板３６を、ナット１４ａの抑えフランジ部４０ａとボルト１５ａの頭部４１ａとの間で挟持して、第１継手部材１１ａと弾性部材１３とを結合している。 The first coupling member 16 is for coupling the elastic member 13 and the first joint member 11a. In the present example, each of the first coupling members 16 includes a nut 14a and a bolt 15a. The nut 14a includes a cylindrical portion 35a having a female screw portion on the inner peripheral surface, and a pressing flange portion 40a protruding radially outward from an end of the cylindrical portion 35a. When connecting the elastic member 13 and the first joint member 11a, first, the cylindrical portion 35a of the nut 14a is inserted into the first joint hole 25 of the first joint member 11a from one axial side. Next, the shaft 39a of the bolt 15a is inserted into the through hole 37a of the first holding plate 36 and the first through hole 38 of the elastic member 13 from the other side in the axial direction, and is formed at the tip of the shaft 39a. The male screw portion is screwed into a female screw portion formed on the inner peripheral surface of the cylindrical portion 35a and further tightened. Thus, the first joint member 11a, the elastic member 13, and the first holding plate 36 are sandwiched between the holding flange portion 40a of the nut 14a and the head 41a of the bolt 15a, and the first joint member 11a and the elastic member 13 is connected.

第２結合部材１７は、弾性部材１３と第２継手部材１２とを結合するためのもので、本例においては、第１結合部材１６と同じ構成を有する。すなわち、第２結合部材１７は、ボルト１５ｂとナット１４ｂとを備える。ナット１４ｂは、内周面に雌ねじ部を有する円筒部３５ｂと、該円筒部３５ｂの端部から径方向外方に突出した抑えフランジ部４０ｂとを備える。弾性部材１３と第２継手部材１２とを結合する際には、まず、ナット１４ｂの円筒部３５ｂを、第２継手部材１２の第２結合孔４５に軸方向他方側から挿入する。次いで、ボルト１５ｂの軸部３９ｂを、第２抑え板４６の通孔３７ｂと弾性部材１３の第２通孔４７とに軸方向一方側から挿入し、かつ、軸部３９ｂの先端部に形成された雄ねじ部を、円筒部３５ｂの内周面に形成された雌ねじ部に螺合しさらに締め付ける。これにより、第２継手部材１２、弾性部材１３および第２抑え板４６を、ナット１４ｂの抑えフランジ部４０ｂとボルト１５ｂの頭部４１ｂとの間で挟持して、第２継手部材１２と弾性部材１３とを結合している。 The second coupling member 17 is for coupling the elastic member 13 and the second joint member 12, and has the same configuration as the first coupling member 16 in this example. That is, the second coupling member 17 includes the bolt 15b and the nut 14b. The nut 14b includes a cylindrical portion 35b having a female screw portion on the inner peripheral surface, and a pressing flange portion 40b protruding radially outward from an end of the cylindrical portion 35b. When connecting the elastic member 13 and the second joint member 12, first, the cylindrical portion 35 b of the nut 14 b is inserted into the second joint hole 45 of the second joint member 12 from the other side in the axial direction. Next, the shaft 39b of the bolt 15b is inserted into the through hole 37b of the second holding plate 46 and the second through hole 47 of the elastic member 13 from one side in the axial direction, and is formed at the tip of the shaft 39b. The male screw portion is screwed into a female screw portion formed on the inner peripheral surface of the cylindrical portion 35b and further tightened. As a result, the second joint member 12, the elastic member 13, and the second pressing plate 46 are sandwiched between the holding flange 40b of the nut 14b and the head 41b of the bolt 15b, and the second joint member 12 and the elastic member 13 is connected.

なお、第１継手部材１１ａのヨーク部５４は、十字軸３３ｃおよびヨーク２９ｃと組み合わされることにより、十字軸式の自在継手１８ｃを構成する。すなわち、ヨーク部５４を構成する１対のアーム部６１の円孔６２、および、ヨーク２９ａを構成する１対のアーム部３０ｃの先端部に形成された円孔のそれぞれの内側に、カップ軸受３２ｃを介して、十字軸３３ｃの軸部を回転自在に支持している。ヨーク２９ｃの基部３４ｃには、図示しない第１トルク伝達軸の端部が結合固定される。 The yoke portion 54 of the first joint member 11a constitutes a cross-shaft universal joint 18c by being combined with the cross shaft 33c and the yoke 29c. That is, the cup bearing 32c is provided inside each of the circular holes 62 of the pair of arm portions 61 forming the yoke portion 54 and the circular holes formed at the distal end portions of the pair of arm portions 30c forming the yoke 29a. , The shaft portion of the cross shaft 33c is rotatably supported. An end of a first torque transmission shaft (not shown) is fixedly connected to the base 34c of the yoke 29c.

また、本例では、ヨークである第２継手部材１２は、十字軸３３ｂおよびヨーク２９ｂと組み合わされることにより、十字軸式の自在継手１８ｂを構成する。すなわち、第２継手部材１２の１対のアーム部４３の円孔４２、および、ヨーク２９ｂを構成する１対のアーム部３０ｂの円孔３１ｂのそれぞれの内側に、カップ軸受３２ｂを介して、十字軸３３ｂの軸部を回転自在に支持している。ヨーク２９ｂの基部３４ｂには、図示しない第２トルク伝達軸の端部が結合固定される。すなわち、本例の弾性継手９ａは、それぞれが十字軸式の１対の自在継手１８ｂ、１８ｃ同士の間に配置されている。 In this example, the second joint member 12 as a yoke constitutes a cross-shaft universal joint 18b by being combined with the cross shaft 33b and the yoke 29b. That is, the inside of each of the circular holes 42 of the pair of arm portions 43 of the second joint member 12 and the circular hole 31b of the pair of arm portions 30b constituting the yoke 29b, is formed through the cup bearing 32b. The shaft of the shaft 33b is rotatably supported. An end of a second torque transmission shaft (not shown) is fixedly connected to the base 34b of the yoke 29b. That is, the elastic joint 9a of the present example is disposed between the pair of universal joints 18b and 18c, each of which is a cross shaft type.

以上のような構成により、本例の弾性継手９ａは、それぞれの中心軸が互いに傾斜した第１トルク伝達軸と第２トルク伝達軸とを、振動の伝達を防止しつつ、トルクの伝達を可能に接続している。 With the above-described configuration, the elastic joint 9a of the present example can transmit torque while preventing transmission of vibration between the first torque transmission shaft and the second torque transmission shaft whose respective central axes are inclined with respect to each other. Connected to

本例では、ヨーク部５４を有するヨーク５０のクランプ部５３を、結合フランジ部２４を有するフランジ付軸部材２０の軸部２３の軸方向一方側の端部に外嵌固定（クランプ）することにより、結合フランジ部２４とヨーク部５４とを備える第１継手部材１１ａを構成している。したがって、本例によれば、フランジ付軸部材２０に対するヨーク部５４の円周方向に関する取り付け位相の調節を容易に行うことができる。このため、弾性継手９ａの両側に配置される第１トルク伝達軸と第２トルク伝達軸との交差角度、すなわち、路面に平行な第１仮想平面内における交差角度、および、車体の幅方向に直交する第２仮想平面内における交差角度の違いに応じて、第１継手部材１１ａを複数種類用意しておく必要がなく、部品を共通化することができる。この結果、部品管理を容易化できて、弾性継手９ａの製造コストを低減することができる。 In this example, the clamp portion 53 of the yoke 50 having the yoke portion 54 is externally fitted and fixed (clamped) to one axial end of the shaft portion 23 of the flanged shaft member 20 having the coupling flange portion 24. , A first joint member 11 a including the coupling flange 24 and the yoke 54. Therefore, according to this example, it is possible to easily adjust the mounting phase in the circumferential direction of the yoke portion 54 with respect to the flanged shaft member 20. For this reason, the intersection angle between the first torque transmission shaft and the second torque transmission shaft arranged on both sides of the elastic joint 9a, that is, the intersection angle in the first virtual plane parallel to the road surface, and the width direction of the vehicle body There is no need to prepare a plurality of types of first joint members 11a in accordance with the difference in the crossing angle in the orthogonal second virtual plane, and components can be shared. As a result, parts management can be facilitated, and the manufacturing cost of the elastic joint 9a can be reduced.

特に本例では、フランジ付軸部材２０の雄セレーション部２２およびヨーク５０の雌セレーション部５７のモジュールを、０．１以上０．４以下、好ましくは０．２以上０．３以下とし、かつ、歯数を３０以上１２０以下、好ましくは５０以上１００以下としている。このため、フランジ付軸部材２０に対するヨーク部５４の円周方向に関する取り付け位相を細かく調整することができる。具体的には、例えば、雄セレーション部２２および雌セレーション部５７の歯数を７２とすると、フランジ付軸部材２０に対するヨーク部５４の円周方向に関する取り付け位相を５度間隔で調整することができ、所望の取り付け位相に対する精度を±２．５度以内に抑えることができる。これにより、第１トルク伝達軸と第２トルク伝達軸との間で伝達されるトルク変動のばらつきを抑えることができる。 In particular, in this example, the module of the male serration portion 22 of the flanged shaft member 20 and the female serration portion 57 of the yoke 50 is set to 0.1 to 0.4, preferably 0.2 to 0.3, and The number of teeth is 30 or more and 120 or less, preferably 50 or more and 100 or less. For this reason, the mounting phase of the yoke portion 54 in the circumferential direction with respect to the flanged shaft member 20 can be finely adjusted. Specifically, for example, if the number of teeth of the male serration portion 22 and the female serration portion 57 is 72, the circumferential mounting phase of the yoke portion 54 with respect to the flanged shaft member 20 can be adjusted at intervals of 5 degrees. The accuracy with respect to a desired mounting phase can be suppressed within ± 2.5 degrees. Thus, it is possible to suppress a variation in torque fluctuation transmitted between the first torque transmission shaft and the second torque transmission shaft.

また、本例では、ヨーク５０のクランプ部５３を、フランジ付軸部材２０の軸部２３の軸方向一方側の端部に外嵌固定（クランプ）することにより、第１継手部材１１ａを構成している。したがって、クランプ部５３と軸部２３の軸方向一方側の端部との嵌合長さ（クランプ部５３への軸部２３の軸方向一方側の端部の挿入長さ）を調整することにより、第１継手部材１１ａの軸方向長さをある程度調整することができる。すなわち、軸部２３の軸方向一方側の端部が十字軸３３ｃと干渉せず、かつ、ヨーク５０とフランジ付軸部材２０との結合強度を確保できる範囲で、クランプ部５３と軸部２３の軸方向一方側の端部との嵌合長さを調整することにより、第１継手部材１１ａの軸方向長さを調整することができる。 In this example, the first joint member 11a is formed by externally fixing (clamping) the clamp portion 53 of the yoke 50 to one axial end of the shaft portion 23 of the flanged shaft member 20. ing. Therefore, by adjusting the fitting length between the clamp portion 53 and the one axial end of the shaft portion 23 (the insertion length of the axial one end portion of the shaft portion 23 into the clamp portion 53). The axial length of the first joint member 11a can be adjusted to some extent. In other words, the clamp portion 53 and the shaft portion 23 are in a range in which the one end in the axial direction of the shaft portion 23 does not interfere with the cross shaft 33c and the strength of the connection between the yoke 50 and the flanged shaft member 20 can be ensured. By adjusting the fitting length with one end in the axial direction, the axial length of the first joint member 11a can be adjusted.

具体的には、図７（Ａ）に示すように、クランプ部５３と軸部２３の軸方向一方側の端部との嵌合長さを長くすることにより、第１継手部材１１ａの軸方向長さを短くすることができる。これに対し、図７（Ｂ）に示すように、クランプ部５３と軸部２３の軸方向一方側の端部との嵌合長さを短くすることにより、第１継手部材１１ａの軸方向長さを長くすることができる。より具体的には、例えば、第１継手部材１１ａの軸方向長さを、−２０ｍ〜＋２０ｍｍの範囲で調整することできる（換言すれば、４０ｍｍ程度伸縮させることができる）。この面からも、弾性継手９ａの部品の共通化を図ることができ、部品管理を容易化できて、弾性継手９ａの製造コストを低減することができる。 Specifically, as shown in FIG. 7A, by increasing the fitting length between the clamp portion 53 and one end in the axial direction of the shaft portion 23, the axial direction of the first joint member 11a is increased. The length can be shortened. On the other hand, as shown in FIG. 7B, by shortening the fitting length between the clamp portion 53 and one axial end of the shaft portion 23, the axial length of the first joint member 11a is reduced. Can be lengthened. More specifically, for example, the axial length of the first joint member 11a can be adjusted in a range of −20 m to +20 mm (in other words, the first joint member 11a can be expanded and contracted by about 40 mm). From this aspect as well, the components of the elastic joint 9a can be shared, the component management can be facilitated, and the manufacturing cost of the elastic joint 9a can be reduced.

なお、第１結合部材１６は、ナット１４ａとボルト１５ａとからなるものに限らず、第１継手部材１１ａと弾性部材１３とを十分な強度で結合できるものであれば、各種構造を採用することができる。例えば、第１結合部材１６をボルトのみから構成し、第１抑え板３６に形成された、ねじ孔である通孔３７ａに螺合する構造を採用することができる。また、第１抑え板３６は、第１結合部材１６による第１継手部材１１ａと弾性部材１３との結合強度を十分に確保することができる限り、省略することができる。 The first coupling member 16 is not limited to the one composed of the nut 14a and the bolt 15a, and may employ various structures as long as the first coupling member 11a and the elastic member 13 can be coupled with sufficient strength. Can be. For example, it is possible to adopt a structure in which the first coupling member 16 is formed only of bolts and is screwed into the through hole 37a formed in the first holding plate 36, which is a screw hole. Further, the first pressing plate 36 can be omitted as long as the bonding strength between the first joint member 11a and the elastic member 13 by the first connecting member 16 can be sufficiently ensured.

同様に、第２結合部材１７は、ナット１４ｂとボルト１５ｂとからなるものに限らず、第２継手部材１２と弾性部材１３とを十分な強度で結合できるものであれば、各種構造を採用することができる。例えば、第２結合部材１７をボルトのみから構成し、第２抑え板４６に形成された、ねじ孔である通孔３７ｂに螺合する構造を採用することができる。また、第２抑え板４６は、第２結合部材１７による第２継手部材１２と弾性部材１３との結合強度を十分に確保することができる限り、省略することができる。 Similarly, the second coupling member 17 is not limited to the one composed of the nut 14b and the bolt 15b, and may employ various structures as long as the second coupling member 12 and the elastic member 13 can be coupled with sufficient strength. be able to. For example, it is possible to adopt a structure in which the second coupling member 17 is formed only of bolts and is screwed into the through hole 37b formed in the second holding plate 46, which is a screw hole. Further, the second pressing plate 46 can be omitted as long as the coupling strength between the second joint member 12 and the elastic member 13 by the second coupling member 17 can be sufficiently ensured.

［実施の形態の第２例］
図８〜図１０は、実施の形態の第２例を示している。本例の第１継手部材１１ｂは、フランジ付軸部材２０ａと、ヨーク部５４ａを有するヨーク付軸部材６９と、クランプ部材７０と、締付部材５１とを備える。 [Second Example of Embodiment]
8 to 10 show a second example of the embodiment. The first joint member 11b of this example includes a shaft member 20a with a flange, a shaft member 69 with a yoke having a yoke portion 54a, a clamp member 70, and a fastening member 51.

フランジ付軸部材２０ａは、実施の形態の第１例のフランジ付軸部材２０と同様の構成を有する。すなわち、フランジ付軸部材２０ａは、軸方向一方側（図９の右側）の端部外周面に第１雄セレーション部７１を有する第１軸部７２と、第１軸部７２の軸方向他方側の端部から径方向外方に突出した結合フランジ部２４とを備える。 The flanged shaft member 20a has the same configuration as the flanged shaft member 20 of the first example of the embodiment. That is, the flanged shaft member 20a has a first shaft portion 72 having a first male serration portion 71 on the outer peripheral surface at one end in the axial direction (right side in FIG. 9), and the other axial side of the first shaft portion 72 in the axial direction. And a coupling flange portion 24 protruding radially outward from the end portion.

ヨーク付軸部材６９は、軸部材７３と、ヨーク７４とを備える。 The yoke-mounted shaft member 69 includes a shaft member 73 and a yoke 74.

軸部材７３は、外周面に、軸方向全長にわたり第２雄セレーション部７５を有する第２軸部７６を備える。 The shaft member 73 includes a second shaft portion 76 having a second male serration portion 75 over the entire length in the axial direction on the outer peripheral surface.

ヨーク７４は、円環形状を有する基部７７と、該基部７７の径方向反対側２箇所から延出した１対のアーム部６１ａからなるヨーク部５４ａとを備える。基部７７は、内周面に、第２雄セレーション部７５の軸方向一方側の端部と係合する雌セレーション部７８を有する。 The yoke 74 includes a base 77 having an annular shape, and a yoke 54a including a pair of arms 61a extending from two radially opposite sides of the base 77. The base portion 77 has a female serration portion 78 on the inner peripheral surface that engages with one axial end of the second male serration portion 75.

軸部材７３とヨーク７４とは、第２雄セレーション部７５の軸方向一方側の端部と雌セレーション部７８とを係合し、かつ、第２軸部７６と基部７７とを溶接することにより結合固定されて、ヨーク付軸部材６９を構成している。 The shaft member 73 and the yoke 74 engage the axially one end of the second male serration portion 75 and the female serration portion 78, and weld the second shaft portion 76 and the base 77. The shaft member 69 with the yoke is fixed and connected.

なお、軸部材７３の軸方向一方側の端部外周面を円筒面とし、かつ、ヨーク７４の基部７７の内周面を円筒面として、軸部材７３の軸方向一方側の端部に基部７７を締り嵌めで外嵌固定するとともに、第２軸部７６と基部７７とを溶接することにより、軸部材７３とヨーク７４と結合固定することもできる。 The outer peripheral surface of one end of the shaft member 73 in the axial direction is a cylindrical surface, and the inner peripheral surface of the base 77 of the yoke 74 is a cylindrical surface. Can be connected and fixed to the shaft member 73 and the yoke 74 by welding the second shaft portion 76 and the base portion 77 together.

クランプ部材７０は、フランジ付軸部材２０ａの第１軸部７２の軸方向一方側の端部と、ヨーク付軸部材６９の第２軸部７６の軸方向他方側の端部とを結合するためのもので、筒状部５５ａと、１対の締付フランジ部５６ｃ、５６ｄとからなるクランプ部５３ａを備える。 The clamp member 70 connects the end of the flanged shaft member 20a on one axial side of the first shaft portion 72 and the end of the second shaft portion 76 of the yoke-mounted shaft member 69 on the other axial side. And a clamp portion 53a including a tubular portion 55a and a pair of fastening flange portions 56c and 56d.

筒状部５５ａは、内周面に雌セレーション部５７ａを有し、かつ、円周方向１箇所に軸方向に伸長するスリット５８ａを有する。 The cylindrical portion 55a has a female serration portion 57a on the inner peripheral surface, and has a slit 58a extending in the axial direction at one circumferential position.

１対の締付フランジ部５６ｃ、５６ｄは、スリット５８ａを挟む両側部分に配置されており、互いに整合する部分に１対の締付孔５９ｃ、５９ｄを有する。 The pair of tightening flange portions 56c and 56d are arranged on both side portions sandwiching the slit 58a, and have a pair of tightening holes 59c and 59d at portions matching each other.

本例では、フランジ付軸部材２０ａの第１雄セレーション部７１をクランプ部材７０の雌セレーション部５７ａの軸方向他方側の端部に係合し、かつ、ヨーク付軸部材６９の第２雄セレーション部７５の軸方向他方側の端部を雌セレーション部５７ａの軸方向一方側の端部に係合した状態で、締付部材５１の軸部６０の基端部を締付孔５９ｃに挿通し、かつ、軸部６０の先端部を締付孔５９ｄに螺合しさらに締め付けている。これにより、１対の締付フランジ部５６ｃ、５６ｄの内側面同士の間隔を縮め、筒状部５５の内径を縮経させることで、クランプ部材７０のクランプ部５３ａを、フランジ付軸部材２０ａの第１軸部７２の軸方向一方側の端部と、ヨーク付軸部材６９の第２軸部７６の軸方向他方側の端部とに外嵌固定（クランプ）している。すなわち、フランジ付軸部材２０ａの第１軸部７２の軸方向一方側の端部と、ヨーク付軸部材６９の第２軸部７６の軸方向他方側の端部とを、クランプ部材７０を介して結合固定して、第１継手部材１１ｂを構成している。 In this embodiment, the first male serration 71 of the flanged shaft member 20a is engaged with the other axial end of the female serration portion 57a of the clamp member 70, and the second male serration of the yoke-mounted shaft member 69 is engaged. The base end of the shaft portion 60 of the tightening member 51 is inserted into the tightening hole 59c with the other axial end of the portion 75 engaged with the one axial end of the female serration portion 57a. Further, the distal end of the shaft portion 60 is screwed into the tightening hole 59d and further tightened. Accordingly, the distance between the inner surfaces of the pair of tightening flange portions 56c and 56d is reduced, and the inner diameter of the cylindrical portion 55 is reduced, so that the clamp portion 53a of the clamp member 70 is connected to the flanged shaft member 20a. The first shaft portion 72 is externally fitted (clamped) to one axial end of the first shaft portion 72 and the other axial end of the second shaft portion 76 of the yoke-mounted shaft member 69. That is, one end in the axial direction of the first shaft portion 72 of the shaft member with flange 20 a and the other end in the axial direction of the second shaft portion 76 of the shaft member with yoke 69 are connected via the clamp member 70. To form a first joint member 11b.

本例では、フランジ付軸部材２０ａの第１軸部７２の軸方向一方側の端部と、ヨーク付軸部材６９の第２軸部７６の軸方向他方側の端部とをクランプ部材７０を介して結合固定することにより、結合フランジ部２４とヨーク部５４ａとを備える第１継手部材１１ｂを構成している。したがって、本例の弾性継手も、実施の形態の第１例の弾性継手９ａと同様に、フランジ付軸部材２０ａに対するヨーク部５４ａの円周方向に関する取り付け位相の調節を容易に行うことができる。 In this example, the clamp member 70 is formed by fixing the end of the first shaft portion 72 of the flanged shaft member 20a on one axial side and the end of the second shaft portion 76 of the yoke-mounted shaft member 69 on the other axial side. The first joint member 11b including the coupling flange portion 24 and the yoke portion 54a is configured by being coupled and fixed via the first joint member 11b. Therefore, also in the elastic joint of the present embodiment, similarly to the elastic joint 9a of the first embodiment of the embodiment, it is possible to easily adjust the mounting phase of the yoke portion 54a with respect to the flanged shaft member 20a in the circumferential direction.

また、本例では、クランプ部材７０のクランプ部５３ａを、フランジ付軸部材２０ａの第１軸部７２の軸方向一方側の端部と、ヨーク付軸部材６９の第２軸部７６の軸方向他方側の端部とに外嵌固定（クランプ）している。したがって、クランプ部５３ａの軸方向他方側の端部に対する第１軸部７２の軸方向一方側の端部の嵌合長さ（クランプ部５３ａの軸方向他方側の端部への第１軸部７２の軸方向一方側の端部の挿入長さ）、および、クランプ部５３ａの軸方向一方側の端部に対する第２軸部７６の軸方向他方側の端部の嵌合長さ（クランプ部５３ａの軸方向一方側の端部への第２軸部７６の軸方向他方側の端部の挿入長さ）を調整することにより、第１継手部材１１ｂの軸方向長さをある程度調整することができる。その他の部分の構成および作用効果は、実施の形態の第１例と同様である。 Further, in this example, the clamp portion 53a of the clamp member 70 is connected to one end in the axial direction of the first shaft portion 72 of the shaft member 20a with the flange and the axial direction of the second shaft portion 76 of the shaft member 69 with the yoke. It is externally fitted (clamped) to the other end. Therefore, the fitting length of the one axial end of the first shaft portion 72 to the other axial end of the clamp portion 53a (the first axial portion to the other axial end of the clamp portion 53a). 72, and the fitting length of the other axial end of the second shaft portion 76 to the axial one end of the clamp portion 53a (the clamp portion). Adjusting the axial length of the first joint member 11b to some extent by adjusting the insertion length of the second axial end of the second axial portion 76 into the axial end of the first axial portion 53a. Can be. The configuration and operation and effect of the other parts are the same as those of the first example of the embodiment.

１ステアリングホイール
２ステアリングシャフト
３ステアリングコラム
４ａ、４ｂ自在継手
５中間シャフト
６ステアリングギヤユニット
７タイロッド
８ピニオン軸
９、９ａ弾性継手
１０ヨーク部
１１、１１ａ、１１ｂ第１継手部材
１２第２継手部材
１３弾性部材
１４ａ、１４ｂナット
１５ａ、１５ｂボルト
１６第１結合部材
１７第２結合部材
１８ａ、１８ｂ、１８ｃ自在継手
１９アーム部
２０、２０ａフランジ付軸部材
２１ヨーク
２２雄セレーション部
２３軸部
２４結合フランジ部
２５第１結合孔
２６雌セレーション部
２７基部
２８円孔
２９ａ、２９ｂ、２９ｃヨーク
３０ａ、３０ｂアーム部
３１ａ、３１ｂ円孔
３２ａ、３２ｂカップ軸受
３３ａ、３３ｂ、３３ｃ十字軸
３４ａ、３４ｂ、３４ｃ基部
３５ａ、３５ｂ円筒部
３６第１抑え板
３７ａ、３７ｂ通孔
３８第１通孔
３９ａ、３９ｂ軸部
４０ａ、４０ｂ抑えフランジ部
４１ａ、４１ｂ頭部
４２円孔
４３アーム部
４４基部
４５第２結合孔
４６第２抑え板
４７第２通孔
４９ａ、４９ｂ凸部
５０ヨーク
５１締付部材
５２フランジ片
５３、５３ａクランプ部
５４、５４ａヨーク部
５５、５５ａ筒状部
５６ａ、５６ｂ、５６ｃ、５６ｄ締付フランジ部
５７、５７ａ雌セレーション部
５８、５８ａスリット
５９ａ、５９ｂ、５９ｃ、５９ｄ締付孔
６０軸部
６１、６１ａアーム部
６２円孔
６３頭部
６４くびれ部
６５かさ部
６６工具係合部
６７連結板部
６８ａ、６８ｂ切り欠き部
６９ヨーク付軸部材
７０クランプ部材
７１第１雄セレーション部
７２第１軸部
７３軸部材
７４ヨーク
７５第２雄セレーション部
７６第２軸部
７７基部
７８雌セレーション部 DESCRIPTION OF SYMBOLS 1 Steering wheel 2 Steering shaft 3 Steering column 4a, 4b Universal joint 5 Intermediate shaft 6 Steering gear unit 7 Tie rod 8 Pinion shaft 9, 9a Elastic joint 10 Yoke part 11, 11a, 11b First joint member 12 Second joint member 13 Elasticity Member 14a, 14b Nut 15a, 15b Bolt 16 First joint member 17 Second joint member 18a, 18b, 18c Universal joint 19 Arm part 20, 20a Shaft member with flange 21 Yoke 22 Male serration part 23 Shaft part 24 Joint flange part 25 First coupling hole 26 Female serration 27 Base 28 Circular hole 29a, 29b, 29c Yoke 30a, 30b Arm 31a, 31b Circular hole 32a, 32b Cup bearing 33a, 33b, 33c Cross shaft 34a, 34b, 34 Base portions 35a, 35b Cylindrical portion 36 First holding plate 37a, 37b Through hole 38 First through hole 39a, 39b Shaft portion 40a, 40b Holding flange portion 41a, 41b Head 42 Circular hole 43 Arm portion 44 Base portion 45 Second connection hole 46 Second pressing plate 47 Second through hole 49a, 49b Convex part 50 Yoke 51 Tightening member 52 Flange piece 53, 53a Clamp part 54, 54a Yoke part 55, 55a Cylindrical part 56a, 56b, 56c, 56d Tightening flange Part 57, 57a Female serration part 58, 58a Slit 59a, 59b, 59c, 59d Tightening hole 60 Shaft part 61, 61a Arm part 62 Circular hole 63 Head 64 Constricted part 65 Shaded part 66 Tool engaging part 67 Connecting plate part 68a, 68b Notch portion 69 Shaft member with yoke 70 Clamp member 71 First male serration portion 72 first shaft portion 73 shaft member 74 yoke 75 second male serration portion 76 second shaft portion 77 base 78 female serration portion

Claims

An elastic member having first through-holes arranged at a plurality of positions in the circumferential direction, and second through-holes arranged at a plurality of positions in the circumferential direction deviating in the circumferential direction from the first through-hole;
A first joint member having a flanged shaft member, a yoke, and a fastening member;
The flanged shaft member includes a shaft portion having a male serration portion on the outer peripheral surface at one end in the axial direction, and a coupling flange portion protruding radially outward from the other axial end portion of the shaft portion. Wherein the coupling flange portion has first coupling holes at a plurality of positions in a circumferential direction,
The yoke has a female serration on its inner peripheral surface that engages with the male serration, and is disposed on both sides of the slit with a cylindrical portion having a slit formed at one location in the circumferential direction. And a clamp portion composed of a pair of flange portions having a fastening hole at portions aligned with each other, and extending from two radially opposite sides of one axial end of the cylindrical portion. Including a yoke portion composed of a pair of arm portions,
The fastening member is inserted or screwed into the fastening hole,
A second joint member having second coupling holes at a plurality of positions in the circumferential direction;
A first coupling member that is inserted or screwed into the first through hole and the first coupling hole to couple the elastic member and the first coupling member;
A second coupling member that is inserted or screwed into the second through hole and the second coupling hole to couple the elastic member and the second joint member;
Elastic joint.

An elastic member having first through-holes arranged at a plurality of positions in the circumferential direction, and second through-holes arranged at a plurality of positions in the circumferential direction deviating in the circumferential direction from the first through-hole;
A first joint member having a flanged shaft member, a yoke-mounted shaft member, a clamp member, and a tightening member;
The flanged shaft member includes a first shaft portion having a first male serration portion on an outer peripheral surface at one end in an axial direction, and protrudes radially outward from an end of the first shaft portion on the other axial side. The connection flange portion, the connection flange portion has a first connection hole at a plurality of positions in the circumferential direction,
The shaft member with a yoke includes a second shaft portion having a second male serration portion on an outer peripheral surface of an end portion on the other side in the axial direction, and two radially opposite ends of one end in the axial direction of the second shaft portion. And a yoke portion consisting of a pair of arm portions extending from
The clamp member has a female serration on its inner peripheral surface that engages with the first male serration and the second male serration, and has a slit formed at one location in the circumferential direction. And a clamp portion comprising a pair of flange portions disposed on both sides of the slit and having a fastening hole at portions aligned with each other,
The fastening member is inserted or screwed into the fastening hole,
A second joint member having second coupling holes at a plurality of positions in the circumferential direction;
A first coupling member that is inserted or screwed into the first through hole and the first coupling hole to couple the elastic member and the first coupling member;
A second coupling member that is inserted or screwed into the second through hole and the second coupling hole to couple the elastic member and the second joint member;
Elastic joint.

The shaft member with a yoke includes, on an outer peripheral surface, a shaft member including the second shaft portion having the second male serration portion, and a base portion externally fitted and fixed to one axial end of the second shaft portion. The elastic joint according to claim 2, further comprising: a yoke including the yoke portion including the pair of arm portions extending from two radially opposite sides of the base portion.

The elastic joint according to any one of claims 1 to 3, wherein a module of the female serration portion is 0.1 or more and 0.4 or less, and the number of teeth is 30 or more and 120 or less.

The elastic joint according to any one of claims 1 to 4, wherein the fastening member is a shear bolt.

The elastic joint according to any one of claims 1 to 4, wherein the fastening member is a hex lobe bolt.