JP6821423B2

JP6821423B2 - Sliding constant velocity universal joint

Info

Publication number: JP6821423B2
Application number: JP2016249313A
Authority: JP
Inventors: 森本　和樹; 和樹森本
Original assignee: NTN Corp
Current assignee: NTN Corp
Priority date: 2016-12-22
Filing date: 2016-12-22
Publication date: 2021-01-27
Anticipated expiration: 2036-12-22
Also published as: JP2018105328A

Description

本発明は、自動車や産業機械等に用いられる摺動式等速自在継手に関する。 The present invention relates to a sliding constant velocity universal joint used in automobiles, industrial machines and the like.

等速自在継手は、角度変位のみを許容する固定式等速自在継手と、角度変位および軸方向変位を許容する摺動式等速自在継手とに大別される。そして、固定式等速自在継手および摺動式等速自在継手はプロペラシャフトやドライブシャフト等に用いられる。 Constant velocity universal joints are roughly classified into fixed constant velocity universal joints that allow only angular displacement and sliding constant velocity universal joints that allow angular displacement and axial displacement. The fixed constant velocity universal joint and the sliding constant velocity universal joint are used for propeller shafts, drive shafts and the like.

プロペラシャフトは、固定式等速自在継手と、摺動式等速自在継手と、これらの等速自在継手を連結する中間シャフトとを備える。このようなプロペラシャフトを車両(自動車)に組み付ける場合、摺動式等速自在継手を一旦圧縮させる状態（シャフトが摺動式等速自在継手の外側継手部材内部側へ押圧された状態）として、プロペラシャフトの全長を縮める。その後、組み付ける部位の相手フランジ部にこの摺動式等速自在継手の外側継手部材を締結し、他方の相手フランジ部にプロペラシャフトを伸ばして締結することになる。 The propeller shaft includes a fixed constant velocity universal joint, a sliding constant velocity universal joint, and an intermediate shaft connecting these constant velocity universal joints. When assembling such a propeller shaft to a vehicle (automobile), the sliding constant velocity universal joint is temporarily compressed (the shaft is pressed toward the inside of the outer joint member of the sliding constant velocity universal joint). Reduce the overall length of the propeller shaft. After that, the outer joint member of this sliding type constant velocity universal joint is fastened to the mating flange portion of the assembly portion, and the propeller shaft is extended and fastened to the other mating flange portion.

しかしながら、摺動式等速自在継手は、内部部品（内側継手部材とトルク伝達部材等で構成される部品）間の隙間が小さいため、継手内部の潤滑グリースが流動しにくい。そこで、従来には、圧縮・伸長させる際の摺動抵抗を低減することが可能な構成の摺動式等速自在継手が提案されている（特許文献１）。 However, in the sliding type constant velocity universal joint, the gap between the internal parts (parts composed of the inner joint member and the torque transmission member) is small, so that the lubricating grease inside the joint does not easily flow. Therefore, conventionally, a sliding type constant velocity universal joint having a configuration capable of reducing sliding resistance during compression / expansion has been proposed (Patent Document 1).

特許文献１に記載の摺動式等速自在継手は、外側継手部材の案内溝相互間に、潤滑剤流動用の連通溝を軸方向に設けたものである。すなわち、自動車に組み付ける際に、外側継手部材の底部に溜まった潤滑剤がこの連通溝を通して内側継手部材の反対側に流動しやすくなり、プロペラシャフト等の長さ寸法を十分に圧縮させることができるものである。 The sliding type constant velocity universal joint described in Patent Document 1 is provided with a communication groove for lubricating fluid flow in the axial direction between the guide grooves of the outer joint member. That is, when assembling to an automobile, the lubricant accumulated at the bottom of the outer joint member easily flows to the opposite side of the inner joint member through the communication groove, and the length dimension of the propeller shaft or the like can be sufficiently compressed. It is a thing.

特開２００６−２６６３３０号公報Japanese Unexamined Patent Publication No. 2006-266330

前記特許文献１に示す等速自在継手では、グリース(潤滑剤)流動を促進する連通溝が運転時使用範囲に形成されている。このため、外側継手部材の内径面と、保持器の外球面との当接長さ（当接面積）が減ることになって、面圧上昇を招くことになる。また、回転中に、外側継手部材の内径面上の連通溝エッジが保持器の外球面と接触することになる。このため、両部材（外側継手部材と保持器）の摩耗が発生することになる。従って、特許文献１に記載のように連通溝を設けたものでは、等速自在継手としての耐久性に悪影響を及ぼす可能性があった。 In the constant velocity universal joint shown in Patent Document 1, a communication groove that promotes the flow of grease (lubricant) is formed in the operating range. Therefore, the contact length (contact area) between the inner diameter surface of the outer joint member and the outer spherical surface of the cage is reduced, which causes an increase in surface pressure. Further, during rotation, the communication groove edge on the inner diameter surface of the outer joint member comes into contact with the outer spherical surface of the cage. Therefore, both members (outer joint member and cage) are worn. Therefore, the one provided with the communication groove as described in Patent Document 1 may adversely affect the durability of the constant velocity universal joint.

さらには、摺動可能領域全体に溝を設けることにより、継手内容積が増え、グリース使用量が増加することになる。また、溝の加工範囲（加工長さ）が長く、コスト高となる。 Further, by providing the groove in the entire slidable region, the internal volume of the joint is increased and the amount of grease used is increased. In addition, the machining range (machining length) of the groove is long, resulting in high cost.

そこで、本発明は、上記課題に鑑みて、組み込み作業時の摺動抵抗を軽減することを前提に、継手内容積の増大を抑え、グリース（潤滑剤）量が過剰に増量するのを防止でき、かつ、車両等に組み付け後の車両運転時における使用範囲での耐久性に影響を及ぼさない摺動式等速自在継手を提供するものである。 Therefore, in view of the above problems, the present invention can suppress an increase in the internal volume of the joint and prevent an excessive increase in the amount of grease (lubricant) on the premise of reducing the sliding resistance during the assembling work. Moreover, the present invention provides a sliding type constant velocity universal joint that does not affect the durability in the range of use during vehicle operation after being assembled to a vehicle or the like.

本発明の第１の摺動式等速自在継手は、外側継手部材と、内側継手部材と、前記外側継手部材と前記内側継手部材との間に介在されるトルク伝達部材とを備え、前記内側継手部材と前記トルク伝達部材とを有する内部部品は前記外側継手部材に軸方向の摺動を可能として収容され、前記内部部品を一旦継手奥側へスライドさせた後、前記内部部品を継手開口側へスライドさせた状態で組み付けられる摺動式等速自在継手であって、前記外側継手部材に開口部を密封する密封装置を有し、前記密封装置は、前記外側継手部材の開口部に装着される金属製アダプタと、この金属製アダプタに装着される可撓性を有するブーツとを備え、前記金属製アダプタにおける、外側継手部材の開口部から軸方向外方へ突出するブーツ装着部に、前記内部部品を継手開口側へスライドさせた状態で、継手内部へグリースが注入されるグリース注入口を設け、前記ブーツ装着部の内径側に配置されるブーツの折り曲げ部に前記グリース注入口を対向させたものである。
本発明の第２の摺動式等速自在継手は、外側継手部材と、内側継手部材と、前記外側継手部材と前記内側継手部材との間に介在されるトルク伝達部材とを備え、前記内側継手部材と前記トルク伝達部材とを有する内部部品は前記外側継手部材に軸方向の摺動を可能として収容され、前記内部部品を一旦継手奥側へスライドさせた後、前記内部部品を継手開口側へスライドさせた状態で組み付けられる摺動式等速自在継手であって、前記外側継手部材に開口部を密封する密封装置を有し、かつ、前記密封装置が設けられた開口部と反対側の開口部をエンドプレートにて塞ぐとともに、継手内部側に前記エンドプレートに近接して止め輪を設け、前記外側継手部材に、継手内部へグリースが注入されるグリース注入口を設けるとともに、このグリース注入口の継手内部側の開口をエンドプレートと反対側における前記止め輪近傍に配設することにより、前記内部部品をエンドプレート側へスライドさせた状態での、継手内部へのグリースの注入を可能としたものである。 The first sliding type constant velocity universal joint of the present invention includes an outer joint member, an inner joint member, and a torque transmission member interposed between the outer joint member and the inner joint member, and the inner side. The internal component having the joint member and the torque transmission member is accommodated in the outer joint member so as to be slidable in the axial direction, and after the internal component is once slid to the back side of the joint, the internal component is moved to the joint opening side. It is a sliding type constant velocity universal joint that is assembled in a state of being slid to, and has a sealing device that seals an opening in the outer joint member, and the sealing device is attached to the opening of the outer joint member. The boot mounting portion is provided with a metal adapter and a flexible boot to be mounted on the metal adapter, and the boot mounting portion of the metal adapter protruding outward in the axial direction from the opening of the outer joint member. With the internal parts slid toward the joint opening side, a grease injection port for injecting grease into the joint is provided , and the grease injection port is made to face the bent portion of the boot arranged on the inner diameter side of the boot mounting portion. It is a fitting.
The second sliding type constant velocity universal joint of the present invention includes an outer joint member, an inner joint member, and a torque transmission member interposed between the outer joint member and the inner joint member, and the inner side. The internal component having the joint member and the torque transmission member is accommodated in the outer joint member so as to be slidable in the axial direction, and after the internal component is once slid to the back side of the joint, the internal component is moved to the joint opening side. It is a sliding type constant velocity universal joint that can be assembled while sliding to, and has a sealing device that seals the opening in the outer joint member, and is on the side opposite to the opening provided with the sealing device. The opening is closed with an end plate, a stop ring is provided on the inner side of the joint in the vicinity of the end plate, and the outer joint member is provided with a grease injection port for injecting grease into the joint. By arranging the opening on the inner side of the joint at the inlet near the stop ring on the side opposite to the end plate, it is possible to inject grease into the joint while the internal parts are slid toward the end plate. It was done.

本発明の摺動式等速自在継手によれば、内部部品を継手開口側へスライドさせた状態（組み付けた状態）で、継手内部へグリース注入口を介してグリースが注入されるので、組み付け作業中における継手内部のグリース量を少なく、または注入しない状態とできる。このため、組み込み作業時における内部部品を外側継手部材奥側へ押し込む際、および内部部品を外側継手部材開口側へ引き出す際には、グリース流動抵抗を小さく又は少なくすることができ、摺動抵抗を低減できる。 According to the sliding type constant velocity universal joint of the present invention, grease is injected into the joint through the grease injection port in a state where the internal parts are slid toward the joint opening side (assembled state), so that the assembly work The amount of grease inside the joint can be reduced or not injected. Therefore, when pushing the internal component to the inner side of the outer joint member and pulling out the inner component to the opening side of the outer joint member during the assembling work, the grease flow resistance can be reduced or reduced, and the sliding resistance can be reduced. Can be reduced.

グリース注入口は、栓部材にて塞がれるのが好ましい。栓部材にてグリース注入口が塞がれていれば、使用時等において、このグリース注入口からグリースが外部へ流出するおそれを防止できる。 The grease injection port is preferably closed with a plug member. If the grease injection port is blocked by the plug member, it is possible to prevent the grease from flowing out from the grease injection port during use or the like.

摺動式等速自在継手として、外側継手部材は内径面にトラック溝が形成され、内側継手部材は外径面にトラック溝が形成され、外側継手部材のトラック溝と内側継手部材のトラック溝との間に介在されるトルク伝達部材はボールであり、このボールを収容するポケットを有するとともに外側継手部材と内側継手部材との間に介装されるケージを備え、ケージの外周面の曲率中心と内周面の曲率中心とが、継手の角度中心に対し、軸方向に逆方向にオフセットしているダブルオフセット型とすることができる。 As a sliding type constant velocity universal joint, the outer joint member has a track groove formed on the inner diameter surface, the inner joint member has a track groove formed on the outer diameter surface, and the outer joint member has a track groove and the inner joint member has a track groove. The torque transmitting member interposed between the balls is a ball, which has a pocket for accommodating the ball and a cage interposed between the outer joint member and the inner joint member, and the center of curvature of the outer peripheral surface of the cage. A double offset type in which the center of curvature of the inner peripheral surface is offset in the direction opposite to the axial center of the joint can be used.

摺動式等速自在継手として、内側継手部材は外周面に軸線に対して互いに逆方向に傾斜したトラック溝を円周方向に交互に形成し、外側継手部材は内周面に軸線に対して互いに逆方向に傾斜したトラック溝を円周方向に交互に形成し、対となる内側継手部材のトラック溝と外側継手部材のトラック溝との交差部にそれぞれ組み込んだトルク伝達部材としてのトルク伝達ボールと、内側継手部材の外周面と前記外側継手部材の内周面との間に介在してトルク伝達ボールを円周方向で所定間隔に保持する窓部を有するケージとを備えたクロスグローブ型とすることができる。 As a sliding constant velocity universal joint, the inner joint member alternately forms track grooves inclined in opposite directions to the axis on the outer peripheral surface in the circumferential direction, and the outer joint member forms on the inner peripheral surface with respect to the axis. A torque transmission ball as a torque transmission member in which track grooves inclined in opposite directions are alternately formed in the circumferential direction and incorporated at the intersections of the track groove of the paired inner joint member and the track groove of the outer joint member. And a cross-glove type having a cage having a window portion that is interposed between the outer peripheral surface of the inner joint member and the inner peripheral surface of the outer joint member and holds the torque transmission balls at predetermined intervals in the circumferential direction. can do.

摺動式等速自在継手として、外側継手部材は円周方向に向き合ったローラ案内面を有する３つのトラック溝が形成され、半径方向に突出した３本の脚軸を有する内側継手部材としてのトリポード部材と、脚軸にころを介して回転可能に外嵌されたトルク伝達手段としてのローラとを備えたトリポード型とすることができる。 As a sliding constant velocity universal joint, the outer joint member is formed with three track grooves having roller guide surfaces facing in the circumferential direction, and tripod as an inner joint member having three leg shafts protruding in the radial direction. It can be a tripod type including a member and a roller as a torque transmitting means rotatably fitted to the leg shaft via a roller.

本発明では、組み込み作業時の摺動抵抗を軽減でき、この組み込み作業性の向上を図ることができる。しかも、内部部品が摺動するエッジが外側継手部材の内径面に形成されず、内部部品と外側継手部材との摩耗を防止でき、耐久性に優れた摺動式等速自在継手を構成できる。また、外側継手部材の内径面に溝等を設ける必要がなく、継手の内容積の増加を防止でき、グリース使用量を最小限に抑えることができ、低コスト化を図ることができる。 In the present invention, the sliding resistance at the time of assembling work can be reduced, and the assembling workability can be improved. Moreover, the edge on which the internal component slides is not formed on the inner diameter surface of the outer joint member, wear between the inner component and the outer joint member can be prevented, and a sliding constant velocity universal joint having excellent durability can be configured. Further, it is not necessary to provide a groove or the like on the inner diameter surface of the outer joint member, an increase in the internal volume of the joint can be prevented, the amount of grease used can be minimized, and the cost can be reduced.

本発明の摺動式等速自在継手であって、グリース注入口が密閉装置に設けられた等速自在継手の断面図である。It is sectional drawing of the sliding type constant velocity universal joint of this invention, which the grease injection port is provided in the sealing device. 図１に示す摺動式等速自在継手を使用した動力伝達構造であるプロペラシャフトの車両への組み付け方法を示す簡略図である。It is a simplified figure which shows the method of assembling the propeller shaft which is the power transmission structure using the sliding type constant velocity universal joint shown in FIG. 1 to a vehicle. 図２に示すプロペラシャフトの車両への組み付け状態を示す簡略図である。It is a simplified view which shows the assembly state of the propeller shaft shown in FIG. 2 to a vehicle. 本発明の摺動式等速自在継手であって、グリース注入口が外側継手部材に設けられた等速自在継手の断面図である。It is sectional drawing of the sliding type constant velocity universal joint of this invention, in which a grease injection port is provided in the outer joint member. 図４に示す摺動式等速自在継手のグリース注入口を栓部材にて塞いでいる状態の断面図である。It is sectional drawing of the state in which the grease injection port of the sliding type constant velocity universal joint shown in FIG. 4 is closed with a plug member. クロスグローブ型の摺動式等速自在継手の断面図である。It is sectional drawing of the cross glove type sliding type constant velocity universal joint. 図６に示す摺動式等速自在継手のトラック溝（ボール溝）の展開図である。It is a development view of the track groove (ball groove) of the sliding type constant velocity universal joint shown in FIG. トリポード型の摺動式等速自在継手の縦断面図である。It is a vertical sectional view of a tripod type sliding type constant velocity universal joint. トリポード型の摺動式等速自在継手の横断面図である。It is a cross-sectional view of a tripod type sliding type constant velocity universal joint.

以下本発明の実施の形態を図１〜図９に基づいて説明する。図２は、本発明に係る摺動式等速自在継手を用いた動力伝達構造であるプロペラシャフトを示す。固定式等速自在継手１と、摺動式等速自在継手２と、これらの等速自在継手を連結するシャフトＳとを備える。この図例では、固定式等速自在継手にバーフィールド型等速自在継手を用い、摺動式等速自在継手にダブルオフセット型等速自在継手を用いている。 Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 9. FIG. 2 shows a propeller shaft having a power transmission structure using a sliding constant velocity universal joint according to the present invention. A fixed constant velocity universal joint 1, a sliding constant velocity universal joint 2, and a shaft S connecting these constant velocity universal joints are provided. In this example, a Barfield type constant velocity universal joint is used for the fixed constant velocity universal joint, and a double offset type constant velocity universal joint is used for the sliding constant velocity universal joint.

固定式等速自在継手１は、軸方向に延びる複数のトラック溝３が内径面４に形成された外側継手部材５と、軸方向に延びる複数のトラック溝６が外径面７に形成された内側継手部材８と、外側継手部材５のトラック溝３と内側継手部材８のトラック溝６との間に介在してトルクを伝達する複数のボール９と、外側継手部材５の内径面４と内側継手部材８の外径面７との間に介在してボール９を保持するケージ１０とを備えている。 In the fixed constant velocity universal joint 1, a plurality of track grooves 3 extending in the axial direction are formed on the inner diameter surface 4, and a plurality of track grooves 6 extending in the axial direction are formed on the outer diameter surface 7. A plurality of balls 9 that transmit torque interposed between the inner joint member 8, the track groove 3 of the outer joint member 5, and the track groove 6 of the inner joint member 8, and the inner diameter surface 4 and the inner side of the outer joint member 5. A cage 10 for holding the ball 9 is provided between the joint member 8 and the outer diameter surface 7.

摺動式等速自在継手２は、円筒形の内径面３１に軸方向に延びるトラック溝３２を円周方向に等間隔に形成した外側継手部材３３と、球面状の外径面３４に軸方向に延びるトラック溝３５を円周方向に等間隔に形成した内側継手部材３６と、対をなす外側継手部材３３のトラック溝３２と内側継手部材３６のトラック溝３５との間に介在させたボール３７と、外側継手部材３３の内径面３１と内側継手部材３６の外径面３４との間に介在しボールを保持するケージ３８とを有し、外側継手部材３３と内側継手部材３６との間で角度変位のみならず軸方向変位も可能なダブルオフセット型の等速自在継手である。すなわち、図１に示すように、ケージ３８の外周面３８ａの曲率中心Ｏ１と内周面３８ｂの曲率中心Ｏ２とが、継手の角度中心Ｏに対し、軸方向に逆方向にオフセットしている。 The sliding constant velocity universal joint 2 has an outer joint member 33 in which track grooves 32 extending in the axial direction are formed at equal intervals in the circumferential direction on a cylindrical inner diameter surface 31 and an axial direction on a spherical outer diameter surface 34. A ball 37 interposed between the inner joint member 36 in which the track grooves 35 extending in the circumferential direction are formed at equal intervals in the circumferential direction, and the track groove 32 of the paired outer joint member 33 and the track groove 35 of the inner joint member 36. And a cage 38 that is interposed between the inner diameter surface 31 of the outer joint member 33 and the outer diameter surface 34 of the inner joint member 36 to hold the ball, and is between the outer joint member 33 and the inner joint member 36. It is a double offset type constant velocity universal joint that can be displaced not only angularly but also axially. That is, as shown in FIG. 1, the center of curvature O1 of the outer peripheral surface 38a of the cage 38 and the center of curvature O2 of the inner peripheral surface 38b are offset in the axial direction opposite to the angle center O of the joint.

シャフトＳは、図２に示すように、中央の大径の筒体１１と、この筒体１１の両端に連設される軸部材１２（１２Ａ、１２Ｂ）とからなる。軸部材１２Ａは、筒体１１に固定されるボス部１３と、このボス部１３から突設される本体軸部１４とを有する。この場合、ボス部１３は、大径部１３ａと小径部１３ｂからなり、大径部１３ａには周方向切欠き部１３ａ１が形成され、この筒体１１の一方の開口端部１１ａが嵌合している。なお、この嵌合状態で、筒体１１の一方の開口端部１１ａと大径部１３ａとが溶接等により接合一体化されている。 As shown in FIG. 2, the shaft S is composed of a central large-diameter tubular body 11 and shaft members 12 (12A, 12B) connected to both ends of the tubular body 11. The shaft member 12A has a boss portion 13 fixed to the tubular body 11 and a main body shaft portion 14 projecting from the boss portion 13. In this case, the boss portion 13 is composed of a large diameter portion 13a and a small diameter portion 13b, a circumferential notch portion 13a1 is formed in the large diameter portion 13a, and one open end portion 11a of the tubular body 11 is fitted. ing. In this fitted state, one open end portion 11a of the tubular body 11 and the large diameter portion 13a are joined and integrated by welding or the like.

本体軸部１４の反ボス側の端部には雄スプライン１４ａが設けられ、本体軸部１４の軸方向中間部位には、後述する密封装置１８のブーツが装着されるブーツ装着部１５が設けられている。このブーツ装着部１５には周方向凹溝１５ａが設けられている。 A male spline 14a is provided at the end of the main body shaft portion 14 on the opposite side of the boss, and a boot mounting portion 15 on which the boots of the sealing device 18 described later are mounted is provided at the axial intermediate portion of the main body shaft portion 14. ing. The boot mounting portion 15 is provided with a circumferential concave groove 15a.

また、固定式等速自在継手１の内側継手部材８の軸心孔の内径面には、雌スプライン８ａが設けられている。このため、シャフトＳの一方の軸部材１２Ａの雄スプライン１４ａがこの内側継手部材８の軸心孔に嵌入され、雄スプライン１４ａと雌スプライン８ａとが嵌合する。また、雄スプライン１４ａの端部には周方向溝が形成され、この周方向溝に、シャフト抜け止め用の止め輪１６が装着されている。 Further, a female spline 8a is provided on the inner diameter surface of the axial core hole of the inner joint member 8 of the fixed constant velocity universal joint 1. Therefore, the male spline 14a of one of the shaft members 12A of the shaft S is fitted into the axial core hole of the inner joint member 8, and the male spline 14a and the female spline 8a are fitted to each other. Further, a circumferential groove is formed at the end of the male spline 14a, and a retaining ring 16 for preventing the shaft from coming off is mounted on the circumferential groove.

そして、外側継手部材５の一方の開口部（反摺動式等速自在継手側）には、エンドプレート１７が装着され、外側継手部材５の他方の開口部には、密封装置１８が装着されている。密封装置１８は、金属製のアダプタ１９とゴムや樹脂製のブーツ２０とを備えたものである。すなわち、金属製アダプタ１９は、外側継手部材５の他方の開口部に外嵌固定される本体筒部１９ａと、この本体筒部１９ａから段付部１９ｂを介して摺動式等速自在継手側へ突出するブーツ装着部１９ｃとからなる。 An end plate 17 is attached to one opening of the outer joint member 5 (on the side of the anti-sliding constant velocity universal joint), and a sealing device 18 is attached to the other opening of the outer joint member 5. ing. The sealing device 18 includes a metal adapter 19 and rubber or resin boots 20. That is, the metal adapter 19 has a main body cylinder portion 19a that is externally fitted and fixed to the other opening of the outer joint member 5, and a sliding type constant velocity universal joint side from the main body cylinder portion 19a via a stepped portion 19b. It is composed of a boot mounting portion 19c protruding toward.

また、ブーツ２０は、大端部２０ａと、小端部２０ｂと、小端部２０ｂと大端部２０ａとを連結するＶ字形乃至Ｕ字形の折り返し部２０ｃとからなる。そして、ブーツ２０の小端部２０ｂが軸部材１２Ａのブーツ装着部１５に外嵌され、この小端部２０ｂに外嵌されるブーツバンドで締め付けられる。また、ブーツ２０の大端部２０ａは、金属製アダプタ１９のブーツ装着部１９ｃを加締めて保持されている。 Further, the boot 20 includes a large end portion 20a, a small end portion 20b, and a V-shaped to U-shaped folded portion 20c connecting the small end portion 20b and the large end portion 20a. Then, the small end portion 20b of the boot 20 is externally fitted to the boot mounting portion 15 of the shaft member 12A, and is tightened by the boot band that is externally fitted to the small end portion 20b. Further, the large end portion 20a of the boot 20 is held by crimping the boot mounting portion 19c of the metal adapter 19.

他方の軸部材１２Ｂも、筒体１１に固定されるボス部２３と、このボス部２３から突設される本体軸部２４とを有する。この場合、ボス部２３は、大径部２３ａと小径部２３ｂからなり、大径部２３ａには周方向切欠き部２３ａ１が形成され、この筒体１１の一方の開口端部１１ｂが嵌合している。なお、この嵌合状態で、筒体１１の一方の開口端部１１ｂと大径部２３ａとが溶接等により接合一体化されている。 The other shaft member 12B also has a boss portion 23 fixed to the tubular body 11 and a main body shaft portion 24 projecting from the boss portion 23. In this case, the boss portion 23 is composed of a large diameter portion 23a and a small diameter portion 23b, a circumferential notch portion 23a1 is formed in the large diameter portion 23a, and one open end portion 11b of the tubular body 11 is fitted. ing. In this fitted state, one open end portion 11b of the tubular body 11 and the large diameter portion 23a are joined and integrated by welding or the like.

本体軸部２４の反ボス側の端部には雄スプライン２４ａが設けられ、本体軸部２４の軸方向中間部位には、後述する密封装置のブーツが装着されるブーツ装着部２５が設けられている。このブーツ装着部２５には周方向凹溝２５ａが設けられている。 A male spline 24a is provided at the end of the main body shaft portion 24 on the opposite side of the boss, and a boot mounting portion 25 on which the boots of the sealing device described later are mounted is provided at the axial intermediate portion of the main body shaft portion 24. There is. The boot mounting portion 25 is provided with a circumferential concave groove 25a.

また、摺動式等速自在継手２の内側継手部材３６の軸心孔の内径面には、雌スプライン３６ａが設けられている。このため、シャフトＳの一方の軸部材１２Ｂの雄スプライン２４ａがこの内側継手部材３６の軸心孔に嵌入され、雄スプライン２４ａと雌スプライン３６ａとが嵌合する。また、雄スプライン２４ａの端部には周方向溝が形成され、この周方向溝に、シャフト抜け止め用の止め輪２６が装着されている。 Further, a female spline 36a is provided on the inner diameter surface of the axial core hole of the inner joint member 36 of the sliding constant velocity universal joint 2. Therefore, the male spline 24a of one of the shaft members 12B of the shaft S is fitted into the axial core hole of the inner joint member 36, and the male spline 24a and the female spline 36a are fitted. Further, a circumferential groove is formed at the end of the male spline 24a, and a retaining ring 26 for preventing the shaft from coming off is mounted on the circumferential groove.

そして、図１に示すように、摺動式等速自在継手２の外側継手部材３３の反固定式等速自在継手側の開口部３３ａには、エンドプレート２７が装着される。このエンドプレート２７は、基板２７ａと、この基板２７ａの外周縁部から継手内方へ延設される短筒部２７ｂとからなり、外側継手部材３３の開口部３３ａにエンドプレート２７の短筒部２７ｂが内嵌される。なお、外側継手部材３３の開口部３３ａの内径面と短筒部２７ｂとの間には、Ｏリング等のシール部材３９ａが配設されている。 Then, as shown in FIG. 1, an end plate 27 is attached to the opening 33a on the non-fixed constant velocity universal joint side of the outer joint member 33 of the sliding constant velocity universal joint 2. The end plate 27 is composed of a substrate 27a and a short cylinder portion 27b extending inward of the joint from the outer peripheral edge portion of the substrate 27a, and the short cylinder portion of the end plate 27 is formed in the opening 33a of the outer joint member 33. 27b is fitted internally. A seal member 39a such as an O-ring is arranged between the inner diameter surface of the opening 33a of the outer joint member 33 and the short cylinder portion 27b.

外側継手部材３３の固定式等速自在継手側の開口部３３ｂには、密封装置２８が装着されている。密封装置２８は、金属製のアダプタ２９とゴムや樹脂製のブーツ３０とを備えたものである。すなわち、金属製アダプタ２９は、外側継手部材５の他方の開口部に外嵌固定される本体筒部２９ａと、この本体筒部２９ａから段付部２９ｂを介して軸方向外側へ突出する筒形状のブーツ装着部２９ｃとからなる。 A sealing device 28 is attached to the opening 33b on the side of the fixed constant velocity universal joint of the outer joint member 33. The sealing device 28 includes a metal adapter 29 and rubber or resin boots 30. That is, the metal adapter 29 has a main body tubular portion 29a that is externally fitted and fixed to the other opening of the outer joint member 5, and a tubular shape that projects outward in the axial direction from the main body tubular portion 29a via the stepped portion 29b. It is composed of a boot mounting portion 29c.

また、ブーツ３０は、大端部３０ａと、小端部３０ｂと、小端部３０ｂと大端部３０ａとを連結するＶ字形乃至Ｕ字形の折り返し部３０ｃとからなる。そして、ブーツ３０の小端部３０ｂが軸部材１２Ｂのブーツ装着部２５に外嵌され、この小端部３０ｂに外嵌されるブーツバンド４４で締め付けられる。また、ブーツ３０の大端部３０ａは、金属製アダプタ２９のブーツ装着部２９ｃの端部を加締めて保持されている。 Further, the boot 30 includes a large end portion 30a, a small end portion 30b, and a V-shaped to U-shaped folded portion 30c connecting the small end portion 30b and the large end portion 30a. Then, the small end portion 30b of the boot 30 is externally fitted to the boot mounting portion 25 of the shaft member 12B, and is tightened by the boot band 44 externally fitted to the small end portion 30b. Further, the large end portion 30a of the boot 30 is held by crimping the end portion of the boot mounting portion 29c of the metal adapter 29.

アダプタ２９の本体筒部２９ａの内面と、外側継手部材３３の開口部３３ｂの外径面との間にはＯリング等のシール部材３９ｂが介在されている。また、外側継手部材３３の開口部３３ｂの内径面には止め輪４０が装着されている。この止め輪４０は、内側継手部材３６と、保持器３８と、トルク伝達部材としてのボール３７とで構成される内部部品４１の外側継手部材３３からの抜けを防止する。なお、外側継手部材３３の開口部３３ｂ側の外径面には周方向凹部４２が設けられ、この周方向凹部４２に金属製アダプタ２９の本体筒部２９ａの縮径端部４３が嵌合し固定されている。 A seal member 39b such as an O-ring is interposed between the inner surface of the main body cylinder portion 29a of the adapter 29 and the outer diameter surface of the opening 33b of the outer joint member 33. A retaining ring 40 is mounted on the inner diameter surface of the opening 33b of the outer joint member 33. The retaining ring 40 prevents the inner component 41 composed of the inner joint member 36, the cage 38, and the ball 37 as a torque transmission member from coming off from the outer joint member 33. A circumferential recess 42 is provided on the outer diameter surface of the outer joint member 33 on the opening 33b side, and the reduced diameter end 43 of the main body cylinder 29a of the metal adapter 29 is fitted into the circumferential recess 42. It is fixed.

そして、密封装置２８の金属製アダプタ２９のブーツ装着部２９ｃには、グリース注入口４５が設けられている。このグリース注入口４５は、グリースを継手内部に注入した後は、栓部材（図示省略）にて塞がれる。この栓部材としては、後述するような埋め栓６２であっても、粘着テープ等のテープ材を貼り付けるようにしてもよい。 A grease injection port 45 is provided in the boot mounting portion 29c of the metal adapter 29 of the sealing device 28. After the grease is injected into the joint, the grease injection port 45 is closed by a plug member (not shown). As the plug member, even if it is an embedding plug 62 as described later, a tape material such as an adhesive tape may be attached.

次に前記のように構成された動力伝達構造（プロペラシャフト）を車両に組み込む作業を説明する。まず図２に示すように、シャフトＳを摺動式等速自在継手側へ押し込んだ状態、すなわち、内部部品４１が継手奥側（開口部３３ａ側）へ押圧された状態であって、このプロペラシャフトの全長が短くなる状態として、取り付けるべき相手フランジ５０に摺動式等速自在継手２を締結する。この場合、継手内部のグリース量を少なく、または注入しない状態とできる。 Next, the work of incorporating the power transmission structure (propeller shaft) configured as described above into the vehicle will be described. First, as shown in FIG. 2, the shaft S is pushed toward the sliding type constant velocity universal joint side, that is, the internal component 41 is pushed toward the back side of the joint (opening 33a side), and this propeller With the total length of the shaft shortened, the sliding constant velocity universal joint 2 is fastened to the mating flange 50 to be attached. In this case, the amount of grease inside the joint can be reduced or not injected.

摺動式等速自在継手２の外側継手部材３３の開口部３３ａの外径部にフランジ部４６が設けられ、このフランジ部４６が相手フランジ５０に突き合せた状態として、ボルト・ナット結合を行う。すなわち、外側継手部材３３のフランジ部４６および相手フランジ５０には貫孔４６ａ、５０ａが設けられ、これらの貫孔５０ａ、４６ａに相手フランジ５０側からボルト部材５１を挿通してフランジ部４６から突出したボルト部材５１のねじ軸にナット部材５２を螺着することになる。なお、このようなボルト・ナット結合は、周方向に沿って所定ピッチで複数個が配設されている。 A flange portion 46 is provided at the outer diameter portion of the opening 33a of the outer joint member 33 of the sliding constant velocity universal joint 2, and bolt / nut coupling is performed with the flange portion 46 abutting against the mating flange 50. .. That is, through holes 46a and 50a are provided in the flange portion 46 and the mating flange 50 of the outer joint member 33, and the bolt member 51 is inserted into these through holes 50a and 46a from the mating flange 50 side and protrudes from the flange portion 46. The nut member 52 is screwed onto the screw shaft of the bolt member 51. A plurality of such bolt-nut connections are arranged at a predetermined pitch along the circumferential direction.

その後、この図２に示す状態から図３に示すように、シャフトＳを、固定式等速自在継手１を取り付ける相手フランジ５５側へ伸ばして、相手フランジ５５の嵌合凹部５５ｂに、エンドプレート１７が嵌合する状態とする。 Then, from the state shown in FIG. 2, as shown in FIG. 3, the shaft S is extended toward the mating flange 55 to which the fixed constant velocity universal joint 1 is attached, and the end plate 17 is formed in the fitting recess 55b of the mating flange 55. Is in a state of being fitted.

この場合も、固定式等速自在継手１の外側継手部材５の開口部５ａの外径部にフランジ部５６が設けられ、このフランジ部５６が相手フランジ５５に突き合せた状態として、ボルト・ナット結合を行う。すなわち、外側継手部材５のフランジ部５６および相手フランジ５５には貫孔５６ａ、５５ａが設けられ、これらの貫孔５５ａ、５６ａに相手フランジ５５側からボルト部材５７を挿通してフランジ部５６から突出したボルト部材５７のねじ軸にナット部材５８を螺着することになる。なお、このようなボルト・ナット結合は、周方向に沿って所定ピッチで複数個が配設されている。 In this case as well, a flange portion 56 is provided at the outer diameter portion of the opening 5a of the outer joint member 5 of the fixed constant velocity universal joint 1, and the flange portion 56 is in a state of being abutted against the mating flange 55. Make a bond. That is, through holes 56a and 55a are provided in the flange portion 56 and the mating flange 55 of the outer joint member 5, and the bolt member 57 is inserted into these through holes 55a and 56a from the mating flange 55 side and protrudes from the flange portion 56. The nut member 58 is screwed onto the screw shaft of the bolt member 57. A plurality of such bolt-nut connections are arranged at a predetermined pitch along the circumferential direction.

この図３に示す状態のように車両に組み込んだ後に、摺動式等速自在継手のグリース注入口４５（図１参照）からグリースを継手内部へ注入し、その後、このグリース注入口４５を図示省略の栓部材にて塞ぐ。これによって、車両への組み込み作業が終了する。 After being incorporated into the vehicle as shown in FIG. 3, grease is injected into the joint from the grease injection port 45 (see FIG. 1) of the sliding constant velocity universal joint, and then the grease injection port 45 is shown. Close with the omitted plug member. As a result, the work of assembling into the vehicle is completed.

本発明では、内部部品４１を継手開口側（開口部３３ｂ側）へスライドさせた状態（組み付けた状態）で、継手内部へグリース注入口４５を介してグリースが注入されるので、組み付け作業中における継手内部のグリース量を少なく、または注入しない状態とできる。このため、組み込み作業時における内部部品４１を継手奥側（（開口部３３ａ側）へ押し込む際、および内部部品４１を引き出す際には、グリース流動抵抗を小さく又は少なくすることができ、摺動抵抗を低減できる。 In the present invention, in a state where the internal component 41 is slid to the joint opening side (opening 33b side) (assembled state), grease is injected into the joint through the grease injection port 45, so that during the assembling work. The amount of grease inside the joint can be reduced or not injected. Therefore, the grease flow resistance can be reduced or reduced when the internal component 41 is pushed into the joint back side ((opening 33a side)) and when the internal component 41 is pulled out during the assembling work, and the sliding resistance can be reduced. Can be reduced.

従って、本発明にかかる摺動式等速自在継手では、組み込み作業時の摺動抵抗を軽減でき、この組み込み作業性の向上を図ることができる。しかも、内部部品４１が摺動するエッジが外側継手部材３３の内径面３１に形成されず、内部部品４１と外側継手部材３３との摩耗を防止でき、耐久性に優れた摺動式等速自在継手を構成できる。また、外側継手部材３３の内径面３１に溝等を設ける必要がなく、継手の内容積の増加を防止でき、グリース使用量を最小限に抑えることができ、低コスト化を図ることができる。 Therefore, in the sliding type constant velocity universal joint according to the present invention, the sliding resistance at the time of assembling work can be reduced, and the assembling workability can be improved. Moreover, the edge on which the internal component 41 slides is not formed on the inner diameter surface 31 of the outer joint member 33, wear of the inner component 41 and the outer joint member 33 can be prevented, and the sliding type constant velocity has excellent durability. Joints can be constructed. Further, it is not necessary to provide a groove or the like on the inner diameter surface 31 of the outer joint member 33, an increase in the internal volume of the joint can be prevented, the amount of grease used can be minimized, and the cost can be reduced.

次に、図４は、グリース注入口４５を外側継手部材３３に設けた場合を示している。この場合、外側継手部材３３は、一方の開口部３３ａは大径部６０とされ、この大径部６０よりも内部側にエンドプレート２７が配設されている。また、エンドプレート２７の近傍には、止め輪６１が装着されている。すなわち、この止め輪６１が内部部品４１の一方の開口部側へのスライドを規制するストッパとなる。 Next, FIG. 4 shows a case where the grease injection port 45 is provided on the outer joint member 33. In this case, in the outer joint member 33, one opening 33a is a large diameter portion 60, and the end plate 27 is arranged on the inner side of the large diameter portion 60. A retaining ring 61 is mounted in the vicinity of the end plate 27. That is, the retaining ring 61 serves as a stopper for restricting the sliding of the internal component 41 toward one opening.

図４に示す摺動式等速自在継手の他の構成は、図１に示す摺動式等速自在継手と同様である。このため、図１と同一部材については、図１に附した符号と同一符号を附してそれらの説明を省略する。この場合も、摺動式等速自在継手のグリース注入口４５からグリースを継手内部へ注入し、その後、図５に示すように、このグリース注入口４５を栓部材である埋め栓６２にて塞ぐ。これによって、車両への組み込み作業が終了する。このため、この図４に示す摺動式等速自在継手も、グリース注入口４５を有するので、図１に示す摺動式等速自在継手と同様の作用効果を奏することができる。 Other configurations of the sliding constant velocity universal joint shown in FIG. 4 are the same as those of the sliding constant velocity universal joint shown in FIG. Therefore, the same members as those in FIG. 1 are designated by the same reference numerals as those attached to FIG. 1, and the description thereof will be omitted. Also in this case, grease is injected into the joint from the grease injection port 45 of the sliding type constant velocity universal joint, and then, as shown in FIG. 5, the grease injection port 45 is closed with a plug member 62. .. As a result, the work of assembling into the vehicle is completed. Therefore, since the sliding constant velocity universal joint shown in FIG. 4 also has the grease injection port 45, the same function and effect as the sliding constant velocity universal joint shown in FIG. 1 can be obtained.

本発明における摺動式等速自在継手として、前記したダブルオフセット型に限るものではなく、図６と図７に示すクロスグルーブ型であっても、図８と図９に示すトリポード型であってもよい。 The sliding type constant velocity universal joint in the present invention is not limited to the double offset type described above, and even the cross groove type shown in FIGS. 6 and 7 is the tripod type shown in FIGS. 8 and 9. May be good.

図６と図７に示すクロスグルーブ型等速自在継手は、外周面７１に軸線に対して互いに逆方向に傾斜したトラック溝（ボール溝）７２（７２ａ、７２ｂ）を円周方向に交互に形成した内側継手部材７３と、内周面７４に軸線に対して互いに逆方向に傾斜したトラック溝７５（ボール溝）（７５ａ、７５ｂ）を円周方向に交互に形成した外側継手部材７６と、対となる内側継手部材７３のトラック溝７２と外側継手部材７６のトラック溝７５との交差部に組み込んだ複数個のトルク伝達ボール７７と、内側継手部材７３の外周面７１と外側継手部材７６の内周面７４との間に介在してトルク伝達ボール７７を円周方向で所定間隔に保持するポケット８１が形成されたケージ７８とを有する。 In the cross-groove type constant velocity universal joint shown in FIGS. 6 and 7, track grooves (ball grooves) 72 (72a, 72b) inclined in opposite directions to the axis are alternately formed on the outer peripheral surface 71 in the circumferential direction. The inner joint member 73 is paired with the outer joint member 76 in which track grooves 75 (ball grooves) (75a, 75b) inclined in opposite directions to the axis are alternately formed on the inner peripheral surface 74 in the circumferential direction. A plurality of torque transmission balls 77 incorporated at the intersection of the track groove 72 of the inner joint member 73 and the track groove 75 of the outer joint member 76, and the outer peripheral surface 71 of the inner joint member 73 and the inner side of the outer joint member 76. It has a cage 78 formed with pockets 81 interposed between the peripheral surface 74 and holding the torque transmission balls 77 at predetermined intervals in the circumferential direction.

図７におけるβは、軸線に対する各トラック溝７２ａ、７２ｂ、７５ａ、７５ｂの交差角を示している。トルク伝達ボール７７は、各トラック溝７２ａ、７２ｂ、７５ａ、７５ｂの交差部に組み込まれている。 Β in FIG. 7 indicates the intersection angle of each track groove 72a, 72b, 75a, 75b with respect to the axis. The torque transmission ball 77 is incorporated in the intersection of the track grooves 72a, 72b, 75a, and 75b.

内側継手部材７３の中心孔（内径孔）７９にシャフトＳの軸部材８０を挿入してスプライン嵌合させ、そのスプライン嵌合により両者間でトルク伝達可能としている。すなわち、内側継手部材７３の中心孔７９に雌スプライン７９ａが形成され、シャフトＳの軸部材８０に雄スプライン８０ａが形成され、シャフト８０の軸端部が内側継手部材７３の中心孔７９に嵌入されて、内側継手部材７３の雌スプライン７９ａと、軸部材８０の雄スプライン８０ａが嵌合する。また、軸部材８０の雄スプライン８０ａの端部には止め輪９０が装着され、軸部材８０の抜けを防止している。 The shaft member 80 of the shaft S is inserted into the center hole (inner diameter hole) 79 of the inner joint member 73 and spline-fitted, and torque can be transmitted between the two by spline fitting. That is, a female spline 79a is formed in the center hole 79 of the inner joint member 73, a male spline 80a is formed in the shaft member 80 of the shaft S, and the shaft end portion of the shaft 80 is fitted into the center hole 79 of the inner joint member 73. The female spline 79a of the inner joint member 73 and the male spline 80a of the shaft member 80 are fitted together. Further, a retaining ring 90 is attached to the end of the male spline 80a of the shaft member 80 to prevent the shaft member 80 from coming off.

外側継手部材７６の軸方向一端側（反シャフト突出側の開口部）には、エンドプレート８２が嵌着され、シャフト突出側の外輪開口部は密封装置８３にて塞がれている。密封装置８３は、ゴムや樹脂製のブーツ８５と金属製の金属製アダプタ８４とからなる。 An end plate 82 is fitted to one end side in the axial direction (opening on the anti-shaft protruding side) of the outer joint member 76, and the outer ring opening on the shaft protruding side is closed by the sealing device 83. The sealing device 83 includes a boot 85 made of rubber or resin and a metal adapter 84 made of metal.

ブーツ８５は、小端部８５ｂと、大端部８５ａと、小端部８５ｂと大端部８５ａとを連結するＶ字形乃至Ｕ字形の折り返し部８５ｃとを備える。金属製アダプタ８４は、筒状の本体部８４ｃと、この本体部８４ｃにリング状平板８４ｂを介して連設されて外側継手部材７６に外嵌される大径筒部８４ａとを備えるものである。また、ブーツ８５の小端部８５ｂはシャフトＳの軸部材８０に取付けられてブーツバンド８６で締付けられている。ブーツ８５の大端部８５ａは金属製アダプタ８４の本体部８４ｃの端部を加締めて保持されている。 The boot 85 includes a small end portion 85b, a large end portion 85a, and a V-shaped to U-shaped folded portion 85c that connects the small end portion 85b and the large end portion 85a. The metal adapter 84 includes a tubular main body 84c and a large-diameter tubular portion 84a that is connected to the main body 84c via a ring-shaped flat plate 84b and is externally fitted to the outer joint member 76. .. Further, the small end portion 85b of the boot 85 is attached to the shaft member 80 of the shaft S and tightened by the boot band 86. The large end portion 85a of the boot 85 is held by crimping the end portion of the main body portion 84c of the metal adapter 84.

また、エンドプレート８２は、外側継手部材７６に外嵌される筒部８２ａと、反継手側に膨出する深皿状部材８２ｃと、筒部８２ａと深皿状部材８２ｃとを連設するリング状平板８２ｂとからなる。そして、外側継手部材７６には図示省略のボルト部材が装着され、このボルト部材の装着によって、密封装置８３の金属製アダプタ８４とエンドプレート８２とが外側継手部材７６に支持される。すなわち、エンドプレート８２のリング状平板８２ｂ、アダプタ８４のリング状平板８４ｂにはそれぞれ貫孔８７，８８が設けられるとともに、外側継手部材７６には貫通孔８９が設けられ、この貫孔８７，８８及び貫通孔８９にボルト部材が嵌入されることになる。 Further, the end plate 82 is a ring in which a tubular portion 82a that is externally fitted to the outer joint member 76, a deep dish-shaped member 82c that bulges toward the anti-joint side, and the tubular portion 82a and the deep dish-shaped member 82c are continuously provided. It is composed of a flat plate 82b. A bolt member (not shown) is attached to the outer joint member 76, and by attaching the bolt member, the metal adapter 84 and the end plate 82 of the sealing device 83 are supported by the outer joint member 76. That is, the ring-shaped flat plate 82b of the end plate 82 and the ring-shaped flat plate 84b of the adapter 84 are provided with through holes 87 and 88, respectively, and the outer joint member 76 is provided with through holes 89, and the through holes 87 and 88 are provided. And the bolt member is fitted into the through hole 89.

このようなクロスグルーブ型等速自在継手であっても、密封装置８３や外側継手部材７６にグリース注入口４５を設けることになる。なお、図６では金属アタプタ８４にグリース注入口４５を設けている。このため、クロスグルーブ型等速自在継手であっても、図１に示すダブルオフセット型等速自在継手と同様、この作用効果を奏することができる。 Even in such a cross-groove type constant velocity universal joint, the grease injection port 45 is provided in the sealing device 83 and the outer joint member 76. In FIG. 6, the metal adapter 84 is provided with a grease injection port 45. Therefore, even a cross-groove type constant velocity universal joint can exhibit this effect and effect as in the double offset type constant velocity universal joint shown in FIG.

また、図８及び図９に示すトリポード型等速自在継手は、外側継手部材９１と、内側継手部材としてのトリポード部材９２と、トルク伝達部材としてのローラ９３とを備える。外側継手部材９１は一端にて開口したカップ状のカップ部９５と、このカップ部９５の底壁９５ａから突設される軸部９６とを有する。カップ部９５は、その内周の円周方向三等分位置に軸方向に延びるトラック溝９７が形成してある。カップ部９５は、横断面で見ると、大径部９８ａと小径部９８ｂが交互に現れる非円筒形状である。すなわち、カップ部９５は、大径部９８ａと小径部９８ｂとを形成することによって、その内周面に、軸方向に延びる３本の前記トラック溝９７が形成される。 Further, the tripod type constant velocity universal joint shown in FIGS. 8 and 9 includes an outer joint member 91, a tripod member 92 as an inner joint member, and a roller 93 as a torque transmission member. The outer joint member 91 has a cup-shaped cup portion 95 opened at one end, and a shaft portion 96 projecting from the bottom wall 95a of the cup portion 95. The cup portion 95 is formed with a track groove 97 extending in the axial direction at a position of dividing the inner circumference into three equal parts in the circumferential direction. The cup portion 95 has a non-cylindrical shape in which large diameter portions 98a and small diameter portions 98b appear alternately when viewed in cross section. That is, by forming the large diameter portion 98a and the small diameter portion 98b in the cup portion 95, the three track grooves 97 extending in the axial direction are formed on the inner peripheral surface thereof.

各トラック溝９７の円周方向で向き合った側壁にローラ案内面（ローラ摺接面）９７ａ、９７ａが形成される。また、内径面においては、円周方向に交互に現れる小内径部９９ｂと大内径部９９ａをローラ案内面９７ａで接続した３弁の花冠状を呈している。すなわち、外側継手部材９１は、円周方向に向き合ったローラ案内面９７ａ，９７ａと両ローラ案内面９７ａ，９７ａ間に設けられた大内径部９９ａからなるトラック溝９７が内周の三箇所に形成されるものである。 Roller guide surfaces (roller sliding contact surfaces) 97a and 97a are formed on the side walls of the track grooves 97 facing each other in the circumferential direction. Further, the inner diameter surface has a three-petaled flower crown shape in which small inner diameter portions 99b and large inner diameter portions 99a appearing alternately in the circumferential direction are connected by a roller guide surface 97a. That is, in the outer joint member 91, track grooves 97 composed of roller guide surfaces 97a and 97a facing in the circumferential direction and large inner diameter portions 99a provided between both roller guide surfaces 97a and 97a are formed at three locations on the inner circumference. Is to be done.

トリポード部材９２はボス１００と脚軸１０１とを備える。ボス１００にはシャフト（図示省略）とトルク伝達可能に結合するスプライン孔１００ａが形成してある。脚軸１０１はボス１００の円周方向三等分位置から半径方向に突出している。 The tripod member 92 includes a boss 100 and a leg shaft 101. The boss 100 is formed with a spline hole 100a that is coupled to a shaft (not shown) so that torque can be transmitted. The leg shaft 101 protrudes in the radial direction from the position of the boss 100 divided into three equal parts in the circumferential direction.

この場合、ローラ９３は、脚軸１０１の外径面に周方向に沿って配設される複数の針状ころ１０２を介して外嵌されている。脚軸１０１の外周面は針状ころ１０２の内側転動面を構成し、ローラ９３の内周面は針状ころ１０２の外側転動面を構成している。すなわち、この図８と図９に示すトリポード型等速自在継手は、シングルローラタイプである。なお、複数の針状ころ１０２は、脚軸１０１の外周面とローラ９３の内周面との間に総ころ状態で配設されている。 In this case, the roller 93 is externally fitted on the outer diameter surface of the leg shaft 101 via a plurality of needle-shaped rollers 102 arranged along the circumferential direction. The outer peripheral surface of the leg shaft 101 constitutes the inner rolling surface of the needle roller 102, and the inner peripheral surface of the roller 93 constitutes the outer rolling surface of the needle roller 102. That is, the tripod type constant velocity universal joint shown in FIGS. 8 and 9 is a single roller type. The plurality of needle-shaped rollers 102 are arranged in a full roller state between the outer peripheral surface of the leg shaft 101 and the inner peripheral surface of the roller 93.

これら針状ころ１０２は、脚軸１０１の付け根部に外嵌されたインナワッシャ１０３と半径方向内側で接すると共に、脚軸１０１の先端部に外嵌されたアウタワッシャ１０４と半径方向外側で接している。このアウタワッシャ１０４は、脚軸１０１の先端部に形成された環状溝１０５に丸サークリップ等の止め輪１０６を嵌合させることにより抜け止めされている。 These needle-shaped rollers 102 are in contact with the inner washer 103 outerly fitted to the base of the leg shaft 101 on the inner side in the radial direction, and are in contact with the outer washer 104 fitted on the tip end portion of the leg shaft 101 on the outer side in the radial direction. There is. The outer washer 104 is prevented from coming off by fitting a retaining ring 106 such as a round circlip into the annular groove 105 formed at the tip of the leg shaft 101.

このようなトリポード型等速自在継手であっても、外側継手部材９１にグリース注入口４５を設けることになる。このため、トリポード型等速自在継手であっても、図１に示すダブルオフセット型等速自在継手と同様、この作用効果を奏することができる。 Even in such a tripod type constant velocity universal joint, the grease injection port 45 is provided in the outer joint member 91. Therefore, even a tripod type constant velocity universal joint can exhibit this effect and effect as in the double offset type constant velocity universal joint shown in FIG.

以上、本発明の実施形態につき説明したが、本発明は前記実施形態に限定されることなく種々の変形が可能であって、グリース注入口４５として、図１では、密封装置に１個設けられたものであり、図４では、外側継手部材に１個設けられたものであったが、密封装置に２個以上設けたり、外側継手部材に２個設けたりしてもよい。また、グリース注入口４５を密封装置及び外側継手部材に設けたりしてもよい。さらには、各グリース注入口４５の大きさや形状等も、グリースを注入でき、かつ、栓部材にて塞ぐことができる範囲で任意のものに設定できる。 Although the embodiment of the present invention has been described above, the present invention is not limited to the embodiment, and various modifications can be made. As the grease injection port 45, one is provided in the sealing device in FIG. In FIG. 4, one is provided on the outer joint member, but two or more may be provided on the sealing device, or two may be provided on the outer joint member. Further, the grease injection port 45 may be provided in the sealing device and the outer joint member. Further, the size and shape of each grease injection port 45 can be set to any size within a range in which grease can be injected and can be closed by a plug member.

図２及び図３に示すプロペラシャフトにおいて、固定式等速自在継手１として、前記実施形態では、バーフィールドタイプであったが、アンダーカットフリータイプの固定式等速自在継手であってもよい。また、摺動式等速自在継手２にクロスグルーブ型等速自在継手を用いた場合、内側継手部材の最大外径をケージの最小内径よりも大きくしたフロートタイプと呼ばれるクロスグルーブ型等速自在継手ものであっても、内側継手部材の最大外径をケージの最小内径よりも小さくしたノンフロートタイプと呼ばれるクロスブルーブ型等速自在継手であってもよい。摺動式等速自在継手２としてトリポードタイプを用いる場合、シングルローラタイプであっても、ダブルローラタイプであってもよい。 In the propeller shafts shown in FIGS. 2 and 3, the fixed constant velocity universal joint 1 is a barfield type in the above embodiment, but may be an undercut-free type fixed constant velocity universal joint. Further, when a cross groove type constant velocity universal joint is used for the sliding constant velocity universal joint 2, a cross groove type constant velocity universal joint called a float type in which the maximum outer diameter of the inner joint member is larger than the minimum inner diameter of the cage is used. It may be a cross-brube type universal joint called a non-float type in which the maximum outer diameter of the inner joint member is smaller than the minimum inner diameter of the cage. When a tripod type is used as the sliding constant velocity universal joint 2, it may be a single roller type or a double roller type.

２８密封装置
２９金属製アダプタ
３０ブーツ
３１内径面
３２トラック溝
３３外側継手部材
３４外径面
３５トラック溝
３６内側継手部材
３７ボール
３８保持器
３８ａ外周面
３８ｂ内周面
４１内部部品
４５グリース注入口
６２栓部材
７１外周面
７２トラック溝
７３内側継手部材
７４内周面
７５トラック溝
７６外側継手部材
７７トルク伝達ボール
７８ケージ
８３密封装置
８４金属製アダプタ
８５ブーツ
９１外側継手部材
９２トリポード部材
９３ローラ
９７トラック溝 28 Sealing device 29 Metal adapter 30 Boot 31 Inner diameter surface 32 Track groove 33 Outer joint member 34 Outer diameter surface 35 Track groove 36 Inner joint member 37 Ball 38 Cage 38a Outer outer surface 38b Inner peripheral surface 41 Internal parts 45 Grease injection port 62 Plug member 71 Outer surface 72 Track groove 73 Inner joint member 74 Inner peripheral surface 75 Track groove 76 Outer joint member 77 Torque transmission ball 78 Cage 83 Sealing device 84 Metal adapter 85 Boot 91 Outer joint member 92 Tripod member 93 Roller 97 Track groove

Claims

外側継手部材と、内側継手部材と、前記外側継手部材と前記内側継手部材との間に介在されるトルク伝達部材とを備え、前記内側継手部材と前記トルク伝達部材とを有する内部部品は前記外側継手部材に軸方向の摺動を可能として収容され、前記内部部品を一旦継手奥側へスライドさせた後、前記内部部品を継手開口側へスライドさせた状態で組み付けられる摺動式等速自在継手であって、
前記外側継手部材に開口部を密封する密封装置を有し、前記密封装置は、前記外側継手部材の開口部に装着される金属製アダプタと、この金属製アダプタに装着される可撓性を有するブーツとを備え、前記金属製アダプタにおける、外側継手部材の開口部から軸方向外方へ突出するブーツ装着部に、前記内部部品を継手開口側へスライドさせた状態で、継手内部へグリースが注入されるグリース注入口を設け、前記ブーツ装着部の内径側に配置されるブーツの折り曲げ部に前記グリース注入口を対向させたことを特徴とする摺動式等速自在継手。 An internal component having an outer joint member, an inner joint member, a torque transmission member interposed between the outer joint member and the inner joint member, and the inner joint member and the torque transmission member is the outer side. A sliding constant-velocity joint that is housed in a joint member so that it can slide in the axial direction, and is assembled with the internal parts slid toward the back side of the joint and then slid toward the joint opening side. And
The outer joint member has a sealing device for sealing the opening, and the sealing device has a metal adapter attached to the opening of the outer joint member and flexibility attached to the metal adapter. Grease is injected into the inside of the joint in a state where the internal parts are slid toward the joint opening side in the boot mounting portion provided with the boot and protruding outward in the axial direction from the opening of the outer joint member in the metal adapter. A sliding type constant velocity universal joint characterized in that the grease injection port is provided and the grease injection port is opposed to a bent portion of the boot arranged on the inner diameter side of the boot mounting portion .

外側継手部材と、内側継手部材と、前記外側継手部材と前記内側継手部材との間に介在されるトルク伝達部材とを備え、前記内側継手部材と前記トルク伝達部材とを有する内部部品は前記外側継手部材に軸方向の摺動を可能として収容され、前記内部部品を一旦継手奥側へスライドさせた後、前記内部部品を継手開口側へスライドさせた状態で組み付けられる摺動式等速自在継手であって、
前記外側継手部材に開口部を密封する密封装置を有し、かつ、前記密封装置が設けられた開口部と反対側の開口部をエンドプレートにて塞ぐとともに、継手内部側に前記エンドプレートに近接して止め輪を設け、前記外側継手部材に、継手内部へグリースが注入されるグリース注入口を設けるとともに、このグリース注入口の継手内部側の開口をエンドプレートと反対側における前記止め輪近傍に配設することにより、前記内部部品をエンドプレート側へスライドさせた状態での、継手内部へのグリースの注入を可能としたことを特徴とする摺動式等速自在継手。 An internal component having an outer joint member, an inner joint member, a torque transmission member interposed between the outer joint member and the inner joint member, and the inner joint member and the torque transmission member is the outer side. A sliding constant-velocity joint that is housed in a joint member so that it can slide in the axial direction, and is assembled with the internal parts slid toward the back side of the joint and then slid toward the joint opening side. And
The outer joint member has a sealing device for sealing the opening, and the opening on the side opposite to the opening provided with the sealing device is closed with an end plate, and the joint is close to the end plate on the inner side. A stop ring is provided, and the outer joint member is provided with a grease injection port for injecting grease into the joint, and an opening on the inside side of the joint of the grease injection port is provided in the vicinity of the stop ring on the side opposite to the end plate. by arranging the inner part of in a state of being slid to the end plate side, sliding type constant velocity universal joint characterized in that to allow the injection of grease into the interior fittings.

前記グリース注入口は、栓部材にて塞がれることを特徴とする請求項１又は請求項２に記載の摺動式等速自在継手。 The sliding type constant velocity universal joint according to claim 1 or 2 , wherein the grease injection port is closed by a plug member.

前記外側継手部材は内径面にトラック溝が形成され、前記内側継手部材は外径面にトラック溝が形成され、前記外側継手部材のトラック溝と前記内側継手部材のトラック溝との間に介在される前記トルク伝達部材はボールであり、このボールを収容するポケットを有するとともに前記外側継手部材と前記内側継手部材との間に介装されるケージを備え、前記ケージの外周面の曲率中心と内周面の曲率中心とが、継手の角度中心に対し、軸方向に逆方向にオフセットしているダブルオフセット型であることを特徴とする請求項１〜請求項３のいずれか１項に記載の摺動式等速自在継手。 The outer joint member has a track groove formed on the inner diameter surface, and the inner joint member has a track groove formed on the outer diameter surface, and is interposed between the track groove of the outer joint member and the track groove of the inner joint member. The torque transmission member is a ball, has a pocket for accommodating the ball, and includes a cage interposed between the outer joint member and the inner joint member, and is provided at the center of curvature and inside of the outer peripheral surface of the cage. The invention according to any one of claims 1 to 3 , wherein the center of curvature of the peripheral surface is a double offset type that is offset in the direction opposite to the axial center of the joint. Sliding constant velocity universal joint.

前記内側継手部材は外周面に軸線に対して互いに逆方向に傾斜したトラック溝を円周方向に交互に形成し、前記外側継手部材は内周面に軸線に対して互いに逆方向に傾斜したトラック溝を円周方向に交互に形成し、対となる前記内側継手部材のトラック溝と前記外側継手部材のトラック溝との交差部にそれぞれ組み込んだ前記トルク伝達部材としてのトルク伝達ボールと、前記内側継手部材の外周面と前記外側継手部材の内周面との間に介在して前記トルク伝達ボールを円周方向で所定間隔に保持する窓部を有するケージとを備えたクロスグローブ型であることを特徴とする請求項１〜請求項３のいずれか１項に記載の摺動式等速自在継手。 The inner joint member alternately forms track grooves inclined in opposite directions to the axis on the outer peripheral surface, and the outer joint member forms track grooves inclined in opposite directions to the axis on the inner peripheral surface. A torque transmission ball as the torque transmission member, which is formed alternately in the circumferential direction and incorporated at the intersection of the track groove of the inner joint member and the track groove of the outer joint member, and the inner side. A cross-glove type having a cage having a window portion that is interposed between the outer peripheral surface of the joint member and the inner peripheral surface of the outer joint member and holds the torque transmission balls at predetermined intervals in the circumferential direction. The sliding type constant velocity universal joint according to any one of claims 1 to 3 .

前記外側継手部材は円周方向に向き合ったローラ案内面を有する３つのトラック溝が形成され、半径方向に突出した３本の脚軸を有する前記内側継手部材としてのトリポード部材と、前記脚軸にころを介して回転可能に外嵌されたトルク伝達手段としてのローラとを備えたトリポード型であることを特徴とする請求項１〜請求項３のいずれか１項に記載の摺動式等速自在継手。 The outer joint member has three track grooves having roller guide surfaces facing in the circumferential direction, and the tripod member as the inner joint member having three leg shafts protruding in the radial direction, and the leg shaft. The sliding constant velocity according to any one of claims 1 to 3 , wherein the tripod type is provided with a roller as a torque transmitting means rotatably fitted via a roller. Universal joint.