JP2007085474A - Universal joint - Google Patents

Universal joint Download PDF

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JP2007085474A
JP2007085474A JP2005275672A JP2005275672A JP2007085474A JP 2007085474 A JP2007085474 A JP 2007085474A JP 2005275672 A JP2005275672 A JP 2005275672A JP 2005275672 A JP2005275672 A JP 2005275672A JP 2007085474 A JP2007085474 A JP 2007085474A
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grease
base end
cross shaft
universal joint
roller bearing
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JP2005275672A
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JP4715417B2 (en
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Koichiro Mizuno
浩一郎 水野
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JTEKT Corp
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JTEKT Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide the universal joint which a grease gun can supply with grease even if the overall length of a cross shaft is shortened. <P>SOLUTION: The universal joint 50 has a cross shaft 1 with two shaft lines z1, z2 to cross mutually and two yokes. The cross shaft 1 has: four trunnions 2; a seal slide contact face 2c; and a base end part 6 located on a central side from the seal slide contact face 2c and protruded outside of the seal slide contact face 2c. A lubricant supply hole 17 to communicate with the inner part of a roller bearing 3 through a grease supply passage 9 closer to the center than to the base end part 6 is provided. The grease nipple 8 connected with a grease gun 10 is fixed to this lubricant supply hole 17 when supplying grease. The base end part 6 is equipped with the grease gun 10 and a recess 6a to prevent the interference with the base end part 6 when supplying the grease. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、自動車のプロペラシャフト等に用いられるユニバーサルジョイントに関する。   The present invention relates to a universal joint used for an automobile propeller shaft and the like.

ユニバーサルジョイントは、十字軸と２つのヨークとがころ軸受部等を介して揺動回転自在に連結されたものである。このユニバーサルジョイントにおいては、ころ軸受部への給脂を目的として、十字軸の中央部（交叉部）に、各ころ軸受部に連通する給脂孔が設けられ、この給脂孔にはグリース注入用のグリースニップルが装着される（特許文献１参照）。
特開２０００−２６６０７３号公報 The universal joint is formed by connecting a cross shaft and two yokes so as to be swingable and rotatable via a roller bearing portion or the like. In this universal joint, for the purpose of grease supply to the roller bearing part, a grease supply hole communicating with each roller bearing part is provided in the center part (crossing part) of the cross shaft, and grease is injected into the grease supply hole. A grease nipple is mounted (see Patent Document 1).
JP 2000-266073 A

一般に、ユニバーサルジョイントには小型化や軽量化が求められている。たとえば、自動車のプロペラシャフトに用いられるユニバーサルジョイントを小型化及び軽量化することは、燃費向上に寄与する。ユニバーサルジョイントの小型化には、十字軸の全長（同一軸線上に対称に設けられた２つのトラニオンの端面間の長さ）を短くするのが有効である。   In general, universal joints are required to be smaller and lighter. For example, reducing the size and weight of a universal joint used for a propeller shaft of an automobile contributes to improving fuel efficiency. To reduce the size of the universal joint, it is effective to shorten the overall length of the cross shaft (the length between the end faces of two trunnions provided symmetrically on the same axis).

十字軸の全長を短くすると、十字軸とヨークとの間の隙間が狭くなる。給脂の際には、上述したグリースニップルにグリースガンを接続するが、十字軸とヨークとの間の隙間が狭くなると、当該隙間にグリースガンを挿入することが出来なくなる。よって、グリースニップルとグリースガンとの接続が出来ず、グリースガンによる給脂が困難となる。   When the overall length of the cross shaft is shortened, the gap between the cross shaft and the yoke is narrowed. When grease is supplied, a grease gun is connected to the above-described grease nipple. However, if the gap between the cross shaft and the yoke becomes narrow, the grease gun cannot be inserted into the gap. Therefore, the grease nipple and the grease gun cannot be connected, and it becomes difficult to supply grease with the grease gun.

本発明は、上述した状況に鑑みなされたものであり、十字軸の全長を短くしてもグリースガンによる給脂が可能なユニバーサルジョイントを提供することを目的とする。   The present invention has been made in view of the above-described situation, and an object of the present invention is to provide a universal joint that can be lubricated by a grease gun even if the overall length of the cross shaft is shortened.

本発明は、互いに直交する２本の軸線を有する十字軸と２つのヨークとがころ軸受部を介して揺動回転自在に連結されたユニバーサルジョイントであって、前記十字軸は、前記２本の軸線に沿って配置された４つのトラニオンと、前記各トラニオンの外周面であって前記ころ軸受部の軌道面をなす軌道面部と、前記軌道面部よりも中央側に位置し当該軌道面部よりも拡径されたシール摺接面と、前記シール摺接面よりも中央側に位置し当該シール摺接面よりも外方に突出した基端部と、前記基端部よりも中央側に設けられ給脂路を介して前記ころ軸受部の内部と連通する潤滑剤供給孔と、前記潤滑剤供給孔に装着され給脂時にグリースガンと接続されるグリースニップルとを有し、前記基端部は、前記給脂時において前記グリースガンと前記基端部との干渉を防止する凹部を部分的に備えていることを特徴とするユニバーサルジョイントである。
かかる発明によれば、グリースガンと基端部との干渉を防止する凹部を基端部に設けたので、十字軸の全長を短くした場合でもグリースガンによる給脂が可能となる。また凹部は基端部において部分的に設けたので、十字軸の作製が容易となる。すなわち、十字軸を切削する際において、当該凹部以外の基端部に十字軸切削用の当て治具を当接させることができる。 The present invention is a universal joint in which a cross shaft having two axes orthogonal to each other and two yokes are connected to each other through a roller bearing portion so as to be swingable and rotatable. Four trunnions arranged along the axis, a raceway surface which is an outer peripheral surface of each trunnion and forms a raceway surface of the roller bearing portion, and is located on the center side with respect to the raceway surface portion and is wider than the raceway surface portion. A diameter seal sliding contact surface, a base end portion located on the center side of the seal sliding contact surface and projecting outward from the seal sliding contact surface, and a supply provided on the center side of the base end portion. A lubricant supply hole that communicates with the interior of the roller bearing portion via a fat passage, and a grease nipple that is attached to the lubricant supply hole and connected to a grease gun during lubrication, and the base end portion is The grease gun and the grease during the lubrication It is a universal joint, characterized in that with a recess to prevent interference between the end portion partially.
According to this invention, since the concave portion for preventing the interference between the grease gun and the base end portion is provided in the base end portion, it is possible to supply the grease with the grease gun even when the overall length of the cross shaft is shortened. Further, since the concave portion is partially provided at the base end portion, the cross shaft can be easily manufactured. That is, when cutting the cross shaft, the cross jig cutting jig can be brought into contact with the base end portion other than the concave portion.

グリースガンと基端部との干渉を防止する切欠き部を基端部に設けたので、十字軸の全長を短くした場合でもグリースガンによる給脂が可能となる。   Since a notch for preventing interference between the grease gun and the base end is provided at the base end, it is possible to supply the grease with the grease gun even when the overall length of the cross shaft is shortened.

以下に、図面を参照しつつ本発明の実施形態について説明する。
図１は、本発明の一実施形態であるユニバーサルジョイント５０を構成する十字軸１及びころ軸受部３等を示す一部欠截平面図であり、図２は十字軸１の斜視図である。図３は、十字軸１を備えたユニバーサルジョイント５０の斜視図であり、図４は十字軸１単体を示す平面図である。なお図３は、グリースガン１０を用いてユニバーサルジョイント５０に給脂する様子をも示しているが、この点については後述する。 Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a partially cutaway plan view showing a cross shaft 1 and a roller bearing portion 3 constituting a universal joint 50 according to an embodiment of the present invention, and FIG. 2 is a perspective view of the cross shaft 1. FIG. 3 is a perspective view of the universal joint 50 including the cross shaft 1, and FIG. 4 is a plan view showing the cross shaft 1 alone. FIG. 3 also shows a state where the grease is supplied to the universal joint 50 using the grease gun 10, and this point will be described later.

図３に示すように、ユニバーサルジョイント５０は、十字軸１と、ころ軸受部３を介して十字軸１と揺動回転自在に連結された２つのヨーク１５とを有している。図２及び図４に示すように、十字軸１は、互いに直交する２本の軸線ｚ１，ｚ２に沿って配置された４つのトラニオン２を有している。一方、図３で示すように、２つのヨーク１５のそれぞれは、二股状のアーム部１６を有している。第一のヨーク１５のアーム部１６が第一の軸線ｚ１に沿って配置された２つのトラニオン２と回動自在に連結され、第二のヨーク１５のアーム部１６が第二の軸線ｚ２に沿って配置された２つのトラニオン２と回動自在に連結されている。   As shown in FIG. 3, the universal joint 50 includes the cross shaft 1 and two yokes 15 connected to the cross shaft 1 via the roller bearing portion 3 so as to be swingable and rotatable. As shown in FIGS. 2 and 4, the cross shaft 1 has four trunnions 2 arranged along two axes z1 and z2 orthogonal to each other. On the other hand, as shown in FIG. 3, each of the two yokes 15 has a bifurcated arm portion 16. The arm portion 16 of the first yoke 15 is rotatably connected to the two trunnions 2 disposed along the first axis z1, and the arm portion 16 of the second yoke 15 is along the second axis z2. And two trunnions 2 arranged in a rotatable manner.

図１で示すように、４つの各トラニオン２のそれぞれには、ころ１１を介してカップ状の軸受外輪１２が被せられている。ころ１１はニードルローラであり、軸受外輪１２の内周面１２ｂとトラニオン２の外周面２ｂとの間に転動自在に介在している。軸受外輪１２の内側底面１２ａとトラニオン２の端面２ａとは直接接触している。なお、トラニオン２の端面２ａと軸受外輪１２の内側底面１２ａとの間に合成樹脂等から形成されたスラストワッシャを介在させてもよい。このように、ころ軸受部３は、軸受外輪１２ところ１１ととを有している。ころ軸受部３の軸受内部は、環状のオイルシール４により密封されている。オイルシール４は軸受外輪１２の開口縁部とシール摺接面２ｃとの隙間を密封している。そして、軸受外輪１２がヨーク１５のアーム部１６に取り付けられている。   As shown in FIG. 1, each of the four trunnions 2 is covered with a cup-shaped bearing outer ring 12 via rollers 11. The roller 11 is a needle roller, and is interposed between the inner peripheral surface 12 b of the bearing outer ring 12 and the outer peripheral surface 2 b of the trunnion 2 so as to roll freely. The inner bottom surface 12a of the bearing outer ring 12 and the end surface 2a of the trunnion 2 are in direct contact. A thrust washer formed of synthetic resin or the like may be interposed between the end surface 2a of the trunnion 2 and the inner bottom surface 12a of the bearing outer ring 12. As described above, the roller bearing portion 3 has the bearing outer ring 12 and 11. The inside of the roller bearing portion 3 is sealed with an annular oil seal 4. The oil seal 4 seals the gap between the opening edge of the bearing outer ring 12 and the seal sliding contact surface 2c. The bearing outer ring 12 is attached to the arm portion 16 of the yoke 15.

図２及び図４に示すように、十字軸１は、各トラニオン２の外周面２ｂであって且つころ軸受部３の軌道面をなす軌道面部ｋと、軌道面部ｋよりも中央側に位置し当該軌道面部ｋよりも拡径されたシール摺接面２ｃと、シール摺接面２ｃよりも中央側に位置し当該シール摺接面２ｃよりも外方に突出した基端部６とを有している。軌道面部ｋ及びシール摺接面２ｃは各トラニオン２毎に設けられており、基端部６は図２における上下それぞれの側に、各トラニオン２あたり一つずつ設けられている。各基端部６は、十字軸１の二つの軸線ｚ１，ｚ２（図１及び図２参照）のいずれにも垂直な方向（つまり軸線ｚ３の方向）に突出している。図５に示すように、基端部６は、十字軸１におけるグリースニップル８設置側（図２における上側）に突出するとともに、グリースニップル８を設置していない側（図２における下側）にも突出している。なお、図５は図４におけるＡ−Ａ線断面図であるが、これを９０回転させた図が、図４におけるＢ−Ｂ線断面図となる。   As shown in FIG. 2 and FIG. 4, the cross shaft 1 is located on the outer peripheral surface 2 b of each trunnion 2 and the raceway surface portion k forming the raceway surface of the roller bearing portion 3, and on the center side of the raceway surface portion k. A seal sliding contact surface 2c having a diameter larger than that of the raceway surface portion k, and a base end portion 6 located on the center side of the seal sliding contact surface 2c and protruding outward from the seal sliding contact surface 2c. ing. The track surface portion k and the seal sliding contact surface 2c are provided for each trunnion 2, and one base end portion 6 is provided for each trunnion 2 on the upper and lower sides in FIG. Each base end 6 protrudes in a direction (that is, the direction of the axis z3) perpendicular to any of the two axes z1 and z2 of the cross shaft 1 (see FIGS. 1 and 2). As shown in FIG. 5, the base end portion 6 projects to the grease nipple 8 installation side (upper side in FIG. 2) of the cross shaft 1 and to the side where the grease nipple 8 is not installed (lower side in FIG. 2). Is also prominent. 5 is a cross-sectional view taken along the line AA in FIG. 4, and a view obtained by rotating this 90 times is a cross-sectional view taken along the line BB in FIG.

上記十字軸１は、基端部６よりも中央側に設けられた中央凹部７を有している。中央凹部７は図２の上下それぞれの側において十字軸１の中央部に１カ所ずつ設けられおり、上側の中央凹部７内にグリースニップル８が設けられている（図１参照）。中央凹部７は、基端部６よりも凹んでいる（図５及び図７参照）。よって中央凹部７は軽量化及びグリースニップル８の設置スペースの確保に寄与している。また図５における上側の中央凹部７内には、給脂路９を介してころ軸受部３の内部と連通する潤滑剤供給孔１７が設けられており、この潤滑剤供給孔１７にグリースニップル８が接続されている（図１及び図３参照）。
上記給脂路９は十字軸１の２本の軸線ｚ１，ｚ２に沿って十字軸１内部を十字状に貫通しており、潤滑剤供給孔１７は、十字状の給脂路９の中央交差部と連通している。また、給脂路９は潤滑剤供給孔１７から各トラニオン２の端面２ａまでを連通している。よってグリースニップル８からグリースを供給すると、４つのころ軸受部３の内部に給脂される。図３に示すように、給脂時には、グリースニップル８にグリースガン１０が接続される。 The cross shaft 1 has a central recess 7 provided on the center side of the base end portion 6. One central recess 7 is provided at the center of the cross shaft 1 on each of the upper and lower sides in FIG. 2, and a grease nipple 8 is provided in the upper central recess 7 (see FIG. 1). The center recessed part 7 is recessed rather than the base end part 6 (refer FIG.5 and FIG.7). Therefore, the central recess 7 contributes to weight reduction and securing of an installation space for the grease nipple 8. 5 is provided with a lubricant supply hole 17 communicating with the interior of the roller bearing portion 3 through a grease supply passage 9, and the grease nipple 8 is provided in the lubricant supply hole 17. Are connected (see FIGS. 1 and 3).
The grease supply passage 9 penetrates the interior of the cross shaft 1 along the two axes z1 and z2 of the cross shaft 1, and the lubricant supply hole 17 intersects the center of the cross-shaped grease passage 9. It communicates with the department. Further, the greasing passage 9 communicates from the lubricant supply hole 17 to the end surface 2a of each trunnion 2. Therefore, when the grease is supplied from the grease nipple 8, the grease is supplied into the four roller bearing portions 3. As shown in FIG. 3, a grease gun 10 is connected to the grease nipple 8 at the time of lubrication.

基端部６は、給脂時においてグリースガン１０基端部６との干渉を防止する凹部（切欠き）６ａを備えている。凹部６ａは、ユニバーサルジョイント５０におけるヨーク１５と十字軸１との隙間を拡大する（以下、隙間拡大効果ともいう）。よって図３に示すように、凹部６ａは、アーム部１６と十字軸１との間の隙間にグリースガン１０を挿入しやすくする。   The base end portion 6 includes a recess (notch) 6a that prevents interference with the base end portion 6 of the grease gun 10 during lubrication. The recess 6a enlarges the gap between the yoke 15 and the cross shaft 1 in the universal joint 50 (hereinafter also referred to as a gap enlargement effect). Therefore, as shown in FIG. 3, the recess 6 a makes it easy to insert the grease gun 10 into the gap between the arm portion 16 and the cross shaft 1.

凹部６ａは、複数設けられている。本実施形態では、図２における上下それぞれの側に凹部６ａが８個ずつ設けられている（図１及び図６参照）。凹部６ａは十字軸１の中央凹部７の周囲に複数（本実施形態では８個）設けられているので、グリースニップル８に対してグリースガン１０を複数の方向から接続できる。   A plurality of recesses 6a are provided. In the present embodiment, eight recesses 6a are provided on each of the upper and lower sides in FIG. 2 (see FIGS. 1 and 6). Since a plurality of recesses 6a are provided around the central recess 7 of the cross shaft 1 (eight in this embodiment), the grease gun 10 can be connected to the grease nipple 8 from a plurality of directions.

基端部６の形状は、軸線ｚ１又は軸線ｚ２に垂直な断面が円弧となるような形状である。そして凹部６ａは、基端部６において部分的に設けられている。凹部６ａを部分的に設けることにより、基端部６における凹部６ａ以外の部分に十字軸切削用の治具（十字軸をチャックするための治具）を当てることができる。ここに、基端部６に十字軸切削用の治具を当てるには、当該基端部６の図２における上下の頂点部６ｂ及びその近傍に当該治具を当接させるための所定の面積が必要であるが、基端部６において凹部６ａを部分的に設けることにより、凹部６ａを有さない十字軸用の治具を十字軸１にも流用することができる。   The shape of the base end portion 6 is such that the cross section perpendicular to the axis line z1 or the axis line z2 is an arc. And the recessed part 6a is partially provided in the base end part 6. FIG. By providing the recess 6a partially, a jig for cutting the cross shaft (a jig for chucking the cross shaft) can be applied to the base end portion 6 other than the recess 6a. Here, in order to apply the cross-axis cutting jig to the base end portion 6, a predetermined area for bringing the jig into contact with the upper and lower apex portions 6b of the base end portion 6 in FIG. However, by providing the recess 6 a partially at the base end 6, a cross shaft jig that does not have the recess 6 a can be used for the cross shaft 1.

軸線ｚ１と軸線ｚ２との交点ｔ（図１参照）を通り且つ軸線ｚ１及び軸線ｚ２に垂直な軸を軸線ｚ３とする（図２参照）。凹部６ａは、十字軸１の軸線ｚ３回りの回転におけるバランスを考慮して配置されている。この凹部６ａの配置について以下で説明する。   An axis passing through the intersection t (see FIG. 1) between the axis line z1 and the axis line z2 and perpendicular to the axis line z1 and the axis line z2 is taken as an axis line z3 (see FIG. 2). The recess 6a is arranged in consideration of the balance in the rotation of the cross shaft 1 around the axis line z3. The arrangement of the recess 6a will be described below.

凹部６ａの配置について説明するため、十字軸１について４つの平面ｐ１〜ｐ４を定義する。平面ｐ１は、軸線ｚ１及び軸線ｚ３を含む平面である。平面ｐ２は軸線ｚ２及び軸線ｚ３を含む平面である。また、軸線ｚ１と軸線ｚ２とを含む平面上において軸線ｚ１と軸線ｚ２とを２等分する２本の線をそれぞれ２等分線ｄ１，ｄ２とする。平面ｐ３は２等分線ｄ１と軸線ｚ３とを含む平面である。また平面ｐ４は２等分線ｄ２と軸線ｚ３とを含む平面である（図１参照）。図１に示すように、凹部６ａは、４つの平面ｐ１〜ｐ４で区切られる８つの領域にそれぞれ１つずつ設けられている。凹部６ａは、平面ｐ１を対称面として対称配置されている。同様に凹部６ａは、平面ｐ２を対称面として対称配置されている。更に凹部６ａは、平面ｐ３を対称面として対称配置されている。そして凹部６ａは、平面ｐ４を対称面として対称配置されている。   In order to describe the arrangement of the recesses 6a, four planes p1 to p4 are defined for the cross shaft 1. The plane p1 is a plane including the axis line z1 and the axis line z3. The plane p2 is a plane including the axis line z2 and the axis line z3. In addition, two lines that bisect the axis line z1 and the axis line z2 on a plane including the axis line z1 and the axis line z2 are set as bisectors d1 and d2, respectively. The plane p3 is a plane including the bisector d1 and the axis line z3. The plane p4 is a plane including the bisector d2 and the axis z3 (see FIG. 1). As shown in FIG. 1, one recess 6a is provided in each of eight regions partitioned by four planes p1 to p4. The recesses 6a are arranged symmetrically with the plane p1 as a symmetry plane. Similarly, the recesses 6a are symmetrically arranged with the plane p2 as a symmetry plane. Further, the recesses 6a are arranged symmetrically with the plane p3 as a symmetry plane. The recesses 6a are arranged symmetrically with the plane p4 as a symmetry plane.

凹部６ａは平面ｐ１上に設けられておらず、平面ｐ２上にも設けられていない。基端部６の軸線ｚ３方向への突出長さは、平面ｐ１上及び平面ｐ２上において最も長くなっている。よって、平面ｐ１上や平面ｐ２上は、アーム部１６と基端部６との隙間が狭くなっている。本実施形態では、平面ｐ１上や平面ｐ２上を避け、アーム部１６と基端部６との隙間が比較的大きい部分に凹部６ａを設けている。そのため凹部６ａの設置領域や深さを最小限としながら隙間拡大効果が大きくされている。また、基端部６の頂点部分（すなわち平面ｐ１上及び平面ｐ２上の部分）には凹部６ａを設けず、該頂点部分を残しているため、凹部６ａを有さない通常の十字軸１と共通の治具（十字軸切削用治具）の使用がより一層容易化されている。   The recess 6a is not provided on the plane p1, and is not provided on the plane p2. The protruding length of the base end portion 6 in the direction of the axis z3 is the longest on the plane p1 and the plane p2. Therefore, the gap between the arm portion 16 and the base end portion 6 is narrow on the plane p1 and the plane p2. In the present embodiment, the concave portion 6a is provided in a portion where the gap between the arm portion 16 and the base end portion 6 is relatively large, avoiding the plane p1 and the plane p2. Therefore, the gap expansion effect is increased while minimizing the installation area and depth of the recess 6a. Further, since the apex portion of the base end portion 6 (that is, the portion on the plane p1 and the plane p2) is not provided with the recess portion 6a, and the apex portion is left, The use of a common jig (cross-axis cutting jig) is further facilitated.

なお、前記実施の形態においては、凹部６ａを図２における上下それぞれの側に設けているが、これは、十字軸１が方向性を持たないようにするためである。つまり、グリースニップル８を接続する潤滑剤供給孔１７を加工する際に、十字軸１が図２における上下何れの側に向いていても、当該潤滑剤供給孔１７を加工できるようにするためである。従って、方向性を考慮しない場合には、前記凹部６ａは、少なくとも潤滑剤供給孔１７を形成する側に設けてあればよい。   In the above-described embodiment, the recess 6a is provided on each of the upper and lower sides in FIG. 2 in order to prevent the cross shaft 1 from having directionality. In other words, when the lubricant supply hole 17 for connecting the grease nipple 8 is processed, the lubricant supply hole 17 can be processed even if the cross shaft 1 is directed to either the upper or lower side in FIG. is there. Therefore, when the directionality is not taken into consideration, the concave portion 6a may be provided at least on the side where the lubricant supply hole 17 is formed.

本発明の一実施形態である十字軸及びころ軸受部等を示す一部欠截平面図である。1 is a partially cutaway plan view showing a cross shaft, a roller bearing portion and the like according to an embodiment of the present invention. 上記十字軸の斜視図である。It is a perspective view of the cross shaft. 本発明の一実施形態であるユニバーサルジョイントにグリースガンを挿入して給油している状態を示す斜視図である。It is a perspective view which shows the state which has inserted the grease gun into the universal joint which is one Embodiment of this invention, and is supplying oil. 上記十字軸を示す平面図である。It is a top view which shows the said cross axis. 図４におけるＡ−Ａ線断面図である。It is the sectional view on the AA line in FIG. 上記十字軸の底面図である。It is a bottom view of the above-mentioned cross axis. 上記十字軸の正面図である。It is a front view of the above-mentioned cross axis.

符号の説明Explanation of symbols

１ 十字軸
２ トラニオン
２ｂ トラニオンの外周面
ｋ 軌道面部
２ｃ シール摺接面
３ ころ軸受部
６ 基端部
６ａ 凹部
８ グリースニップル
９ 給脂路
１０ グリースガン
１５ ヨーク
１７ 潤滑剤供給孔
５０ ユニバーサルジョイント DESCRIPTION OF SYMBOLS 1 Cross shaft 2 Trunnion 2b Trunnion outer peripheral surface k Track surface part 2c Seal sliding contact surface 3 Roller bearing part 6 Base end part 6a Recessed part 8 Grease nipple 9 Greasing path 10 Grease gun 15 Yoke 17 Lubricant supply hole 50 Universal joint

Claims (1)

互いに直交する２本の軸線を有する十字軸と２つのヨークとが、ころ軸受部を介して揺動回転自在に連結されたユニバーサルジョイントであって、
前記十字軸は、
前記２本の軸線に沿って配置された４つのトラニオンと、
前記各トラニオンの外周面であって前記ころ軸受部の軌道面をなす軌道面部と、
前記軌道面部よりも中央側に位置し、当該軌道面部よりも拡径されたシール摺接面と、
前記シール摺接面よりも中央側に位置し当該シール摺接面よりも外方に突出した基端部と、
前記基端部よりも中央側に設けられ給脂路を介して前記ころ軸受部の内部と連通する潤滑剤供給孔と、
前記潤滑剤供給孔に装着され給脂時にグリースガンと接続されるグリースニップルとを有し、
前記基端部は、前記給脂時において前記グリースガンと前記基端部との干渉を防止する凹部を部分的に備えていることを特徴とするユニバーサルジョイント。 A universal joint in which a cross shaft having two axes orthogonal to each other and two yokes are connected to each other via a roller bearing portion so as to be swingable and rotatable,
The cross axis is
Four trunnions arranged along the two axes;
A raceway surface portion which is an outer peripheral surface of each trunnion and forms a raceway surface of the roller bearing portion;
A seal sliding contact surface located closer to the center than the raceway surface portion and having a diameter larger than that of the raceway surface portion;
A proximal end portion located on the center side of the seal sliding contact surface and projecting outward from the seal sliding contact surface;
A lubricant supply hole that is provided closer to the center than the base end portion and communicates with the inside of the roller bearing portion via a greasing passage;
A grease nipple that is attached to the lubricant supply hole and connected to a grease gun during lubrication;
2. The universal joint according to claim 1, wherein the base end part is partially provided with a recess that prevents interference between the grease gun and the base end part during the lubrication.
JP2005275672A 2005-09-22 2005-09-22 Universal joint Active JP4715417B2 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101634343A (en) * 2008-07-25 2010-01-27 万向集团公司 Universal joint with a straight line structure and steering mechanism thereof
CN102207133A (en) * 2011-04-29 2011-10-05 中国科学院上海光学精密机械研究所 Inner bore type Hooke hinge
US8348771B2 (en) 2007-06-13 2013-01-08 Jtekt Corporation Cross shaft member and cross shaft joint with the same
CN115126791A (en) * 2022-08-31 2022-09-30 万向钱潮股份公司 Lightweight cross axle

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03270847A (en) * 1990-03-20 1991-12-03 Amada Co Ltd Automatic oil supplying device for traveling system
JPH1120771A (en) * 1997-06-27 1999-01-26 Shimano Inc Bicycle rotation component
JP2002310181A (en) * 2001-04-16 2002-10-23 Toyota Motor Corp Universal joint
JP2003156064A (en) * 2001-11-21 2003-05-30 Kawasaki Steel Corp Universal joint
JP2003232381A (en) * 2002-02-12 2003-08-22 Matsui Seisakusho:Kk Oil controller of universal joint
JP2004257565A (en) * 2004-04-22 2004-09-16 Nsk Ltd Joint portion between shaft and yoke of universal joint

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03270847A (en) * 1990-03-20 1991-12-03 Amada Co Ltd Automatic oil supplying device for traveling system
JPH1120771A (en) * 1997-06-27 1999-01-26 Shimano Inc Bicycle rotation component
JP2002310181A (en) * 2001-04-16 2002-10-23 Toyota Motor Corp Universal joint
JP2003156064A (en) * 2001-11-21 2003-05-30 Kawasaki Steel Corp Universal joint
JP2003232381A (en) * 2002-02-12 2003-08-22 Matsui Seisakusho:Kk Oil controller of universal joint
JP2004257565A (en) * 2004-04-22 2004-09-16 Nsk Ltd Joint portion between shaft and yoke of universal joint

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8348771B2 (en) 2007-06-13 2013-01-08 Jtekt Corporation Cross shaft member and cross shaft joint with the same
CN101634343A (en) * 2008-07-25 2010-01-27 万向集团公司 Universal joint with a straight line structure and steering mechanism thereof
CN102207133A (en) * 2011-04-29 2011-10-05 中国科学院上海光学精密机械研究所 Inner bore type Hooke hinge
CN115126791A (en) * 2022-08-31 2022-09-30 万向钱潮股份公司 Lightweight cross axle

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