JP3815697B2 - Constant velocity joint boot structure - Google Patents

Constant velocity joint boot structure Download PDF

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Publication number
JP3815697B2
JP3815697B2 JP34711795A JP34711795A JP3815697B2 JP 3815697 B2 JP3815697 B2 JP 3815697B2 JP 34711795 A JP34711795 A JP 34711795A JP 34711795 A JP34711795 A JP 34711795A JP 3815697 B2 JP3815697 B2 JP 3815697B2
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Japan
Prior art keywords
constant velocity
velocity joint
adapter
cylindrical
boot
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Expired - Fee Related
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JP34711795A
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Japanese (ja)
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JPH09166150A (en
Inventor
義孝 佐藤
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Showa Corp
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Showa Corp
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Description

【0001】
【発明の属する技術分野】
本発明は、自動車のプロペラシャフト等に使用されアウターにインナーが嵌入されて等速で回転を伝達する等速ジョイントにおいて、アウター内部に潤滑剤等を密封保持するとともに、外部からの塵埃,水等の浸入を防止するためのブーツ構造に関する。
【0002】
【従来の技術】
等速ジョイントにおけるブーツの従来の一般的構造として、特開昭59−144820号公報に記載された例を図3に図示し説明する。
【0003】
等速ジョイント01は、円筒状をしたアウター02内にインナー03が嵌入され、インナー03に回動自在に支持されたボール04がアウター02の内面に形成された溝条に係合して、アウター02とインナー03の相互の回転中心軸が角度を持っても等速で回転トルクが伝達される。
【0004】
かかる等速ジョイント01に設けられるブーツ05は、円筒状をした金属製のアダプター06の一方の開口端に、ゴム製の可撓性を有する筒状のベロー07の一端が加締め付けられて連結されたもので、そのアダプター06の他方の開口端が、等速ジョイント01のアウター02にOリング08を介して嵌着され、ベロー07の他端が該等速ジョイント01のインナー03に嵌着され、アウター02内部を密封保持している。
【0005】
その他特開昭63−269724号公報、実開昭62−2837号公報等に、等速ジョイントのブーツ構造が記載されているが、いずれも基本的構造は上記と同じである。
【0006】
【発明が解決しようとする課題】
以上のように従来のブーツ05は、アダプター06とベロー07とを個別に作成して両者の端部を加締めるなどして連結するもので、作成工程が多い。
特にアダプター06は、金属製で錆耐食性を考慮してメッキもしくは塗装が必要である。
【0007】
また等速ジョイント01のアウター02にアダプター06を水密に嵌着するのに、Oリング08が必要であり、かつ抜け止めのため加締めたりあるいはボルト締めが必要であり、部品点数が多く、組付作業が簡単ではない。
このようにブーツの加工製作作業やブーツの組付作業が面倒で、コストが高くなってしまう。
【0008】
本発明は、かかる点に鑑みなされたもので、その目的とする処は、部品点数が少なく製造作業が容易で、コストの低減を図ることができる等速ジョイントのブーツ構造を供する点にある。
【0009】
【課題を解決するための手段】
上記目的を達成するために、本発明は、等速ジョイントのアウターに接合される円筒状をなすアダプター部と、同アダプター部に連続して延出し該等速ジョイントのインナーに他方の開口端を接合する可撓性を有するベロー部とからなるブーツにおいて、ベロー部を構成する可撓性部材が連続して円筒状補強金具を内部に埋設して前記アダプター部を構成し、前記円筒状補強金具に周方向に亘って凹部を形成し、前記アダプター部の可撓性部材の内周面に前記円筒状補強金具の凹部に合わせて周方向に亘って突条がインサート成型されている等速ジョイントのブーツ構造とした。
【0010】
本ブーツは、ベロー部から連続して形成されるアダプター部に円筒状補強金具が埋設された一体構造をしており、インサート成型により簡単に製造でき、アダプター部の補強金具は外界に露出していないので、錆耐食性に優れている。
【0011】
該アダプター部を等速ジョイントのアウターに嵌着するのに、Oリングを介装せずに水密性が維持され、部品点数が少なく組付作業が容易である。
したがってブーツの結合加工費や等速ジョイントへのブーツの組付け費等の削減によりコストの低減を図ることができる。
【0012】
円筒状補強金具に周方向に亘って凹部を形成し、アダプター部の可撓性部材の内周面に円筒状補強金具の凹部に合わせて周方向に亘って突条を形成したことで、等速ジョイントのアウターとブーツのアダプターとの嵌着を確実にし抜けを防止することができる。
【0013】
前記アダプター部は、前記等速ジョイントのアウターの外周に嵌合する嵌合円筒部と段部を介して径を縮小した円筒部とからなり、前記嵌合円筒部に前記突条を形成した請求項1記載の等速ジョイントのブーツ構造とすることで、等速ジョイントのアウターにブーツのアダプター部を接合する際に、前記嵌合円筒部をアウター外周に前記段部がアウター端面に当接するまで嵌挿して位置決めが容易にでき、作業性を良くするとともに、所定位置に突条を位置させ抜け止めを確実にすることが可能である。
【0014】
【発明の実施の形態】
以下本発明に係る一実施の形態について図1および図2に図示し説明する。
図1は、本実施の形態に係るブーツ10の一部断面とした側面図である。
ブーツ10は、ベロー部11と略円筒状をしたアダプター部12とからなる。
【0015】
ベロー部11は、可撓性を有するゴム製であり、小径円筒部11aから外側にめくり返されるように湾曲した湾曲部11bを経て大径端部11cが形成されて、湾曲部11bが柔軟に変形可能である。
【0016】
かかるベロー部11の大径端部11cからゴム部材は、屈曲して延出し湾曲部11bの外周を覆う円筒状のアダプター部12に連続しており、アダプター部12の内部には円筒状をした補強金具13が埋設されている。
アダプター部12は、ベロー部11を略覆う円筒部12aと段部12bを経て拡径した嵌合円筒部12cとからなり、補強金具13も同形状に倣って全体に亘って埋設されている。
【0017】
嵌合円筒部12cにおける補強金具13は、一部周方向に亘って凹部13aが形成されており、同凹部13aに合わせてゴム部材の嵌合円筒部12c内周面に突条12dが突出形成されている。
【0018】
またベロー部11の小径円筒部11aの端部外周面には、底の浅い溝条11dが形成されている。
このようなブーツ10は、ゴム部材を加硫成型する際に補強金具13をインサートして一体に成型して製造する。
【0019】
該ブーツ10を等速ジョイント1に装着した状態を図2に図示する。
等速ジョイント1は、トリポード型のジョイントであり、自動車のドライブシャフトに使用される。
【0020】
該等速ジョイント1のアウター2は円筒状をなし、その内周面に軸方向に指向した溝条が等間隔に3条形成され、他方インナー3はドライブシャフトに連結一体に延出したインナー軸部3bに放射方向に3個のトリポード3aが突出しており、同3個のトリポード3aが前記3条の溝条に摺動自在に嵌入して動力の伝達が行われる。
アウター2の円筒外周面には、所定箇所に溝条2aが周方向に亘って形成されている。
【0021】
かかる等速ジョイント1にブーツ10を組み付ける場合、まずインナー軸部3bの所定箇所にブーツ10のベロー部11の小径円筒部11aを嵌合し、その外周面の溝条11dに締付バンド15を嵌合して緊締し固着しておき、かかる状態でインナー軸部3bの端部の3個のトリポード3aをアウター2の各溝条に嵌入する。
【0022】
そしてブーツ10のアダプター部12の嵌合円筒部12cをアウター2の開口端部外周に嵌着する。
アダプター部12の嵌合円筒部12cは、アダプター部12の段部12bがアウター2の開口端に当接するまでアウター2の外周に嵌挿されるので、位置決めが容易になされ作業性がよい。
【0023】
こうして等速ジョイント1のアウター2の所定位置にアダプター部12が嵌着されると、嵌合円筒部12cの内周面に形成された突条12dが、アウター2の外周面に形成された溝条2aに嵌合し、アダプター部12の抜けが防止される。
【0024】
以上のようにして図2に示すブーツ取り付け状態となり、ブーツ10のアダプター部12はアウター2の外周にゴム部材の圧接を介して嵌着されるので、Oリング等を要せずにアウター2の内部が水密に密封され、潤滑剤の外部への漏れ等が防止されるとともに、外界からの塵埃や水等の浸入が防止される。
【0025】
以上のように本ブーツ10は、補強金具13を埋設したインサート成型により一体に製造され、ベロー部とアダプター部との結合作業などがなく製造工程が少なく簡単である。
補強金具13はゴム部材内に埋設され、外界と遮断されているので、錆等に対する耐食性に優れ、メッキや塗装が必要ない。
【0026】
ブーツ10のアダプター部12を等速ジョイント1のアウター2に嵌着するのに、Oリング等のシール部材が不要で部品点数が少なく組付作業が容易である。
このようにブーツ10の加工費や等速ジョイント1への組付け費等が削減でき、コストの低減を図ることができる。
【0029】
【発明の効果】
本発明は、ベロー部から連続して形成されるアダプター部に円筒状補強金具が埋設された一体構造をしたブーツであり、インサート成型により簡単に製造でき、アダプター部の補強金具は外界に露出していないので、錆耐食性に優れている。
【0030】
アダプター部を等速ジョイントのアウターに嵌着するのに、Oリングを介装せずに水密性が維持され、部品点数が少なく組付作業が容易であり、したがってブーツの結合加工費や等速ジョイントへのブーツの組付け費等の削減によりコストの低減を図ることができる。
【0031】
アダプター部の内周面に周方向に亘って突条を形成したブーツ構造とすることで、等速ジョイントのアウターとブーツのアダプターとの嵌着を確実にし抜けを防止することができる。
【0032】
突条を形成した嵌合円筒部と段部を介して径を縮小した円筒部とからアダプター部を構成することで、嵌合円筒部をアウター外周に段部がアウター端面に当接するまで嵌挿して位置決めが容易にでき、作業性を良くするとともに、所定位置に突条を位置させ抜け止めを確実にすることが可能である。
【図面の簡単な説明】
【図1】 本発明の一実施の形態に係るブーツの一部断面とした側面図である。
【図2】 同ブーツを等速ジョイントに装着した状態を示す一部断面とした側面図である。
【図3】 従来のブーツを等速ジョイントに装着した状態を示す一部断面とした側面図である。
【符号の説明】
1…等速ジョイント、2…アウター、3…インナー、
10…ブーツ、11…ベロー部、12…アダプター部、13…補強金具、15…締付バンド
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a constant velocity joint that is used for a propeller shaft or the like of an automobile and in which an inner is inserted into an outer and transmits rotation at a constant speed, and a lubricant or the like is sealed inside the outer, and dust, water, etc. from the outside The present invention relates to a boot structure for preventing the intrusion of water.
[0002]
[Prior art]
As a conventional general structure of a boot in a constant velocity joint, an example described in Japanese Patent Application Laid-Open No. 59-144820 will be described with reference to FIG .
[0003]
The constant velocity joint 01 has an inner 03 fitted in a cylindrical outer 02, and a ball 04 rotatably supported by the inner 03 engages with a groove formed on the inner surface of the outer 02, so that the outer Even if the rotational center axes of 02 and inner 03 have an angle, the rotational torque is transmitted at a constant speed.
[0004]
A boot 05 provided in such a constant velocity joint 01 is connected to one open end of a cylindrical metal adapter 06 by crimping one end of a rubber-made cylindrical bellows 07. The other open end of the adapter 06 is fitted to the outer 02 of the constant velocity joint 01 via the O-ring 08, and the other end of the bellows 07 is fitted to the inner 03 of the constant velocity joint 01. The outer 02 is sealed and held inside.
[0005]
In addition, JP-A-63-269724, JP-A-62-2837, etc. describe the boot structure of a constant velocity joint, but the basic structure is the same as described above.
[0006]
[Problems to be solved by the invention]
As described above, the conventional boot 05 has many production steps because the adapter 06 and the bellows 07 are individually created and connected by crimping the ends of both.
In particular, the adapter 06 is made of metal and needs to be plated or painted in consideration of rust corrosion resistance.
[0007]
Also, an O-ring 08 is required to fit the adapter 06 into the outer 02 of the constant velocity joint 01 in a watertight manner, and it must be tightened or bolted to prevent it from coming off. Attaching work is not easy.
In this way, the processing and manufacturing work of the boots and the work of assembling the boots are troublesome and the cost becomes high.
[0008]
The present invention has been made in view of the above points, and the object of the present invention is to provide a boot structure for a constant velocity joint that has a small number of parts, can be easily manufactured, and can reduce costs.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a cylindrical adapter part joined to the outer part of a constant velocity joint, and the other opening end extending continuously from the adapter part to the inner part of the constant velocity joint. In a boot comprising a flexible bellows part to be joined, a flexible member constituting the bellows part continuously embeds a cylindrical reinforcing bracket inside to constitute the adapter part, and the cylindrical reinforcing bracket A constant velocity joint in which a recess is formed in the circumferential direction, and a protrusion is insert-molded on the inner circumferential surface of the flexible member of the adapter portion along the circumferential direction in accordance with the recess of the cylindrical reinforcing metal fitting. The boot structure.
[0010]
This boot has an integrated structure in which a cylindrical reinforcing bracket is embedded in an adapter section that is formed continuously from the bellows section.It can be easily manufactured by insert molding, and the reinforcing bracket of the adapter section is exposed to the outside. No rust and corrosion resistance.
[0011]
When the adapter portion is fitted to the outer part of the constant velocity joint, water tightness is maintained without interposing an O-ring, the number of parts is small, and the assembling work is easy.
Therefore, it is possible to reduce the cost by reducing the boot processing cost and the boot assembly cost to the constant velocity joint.
[0012]
By forming a concave portion in the circumferential direction in the cylindrical reinforcing metal fitting, and forming a protrusion on the inner peripheral surface of the flexible member of the adapter portion in the circumferential direction in accordance with the concave portion of the cylindrical reinforcing metal fitting , etc. The outer joint of the speed joint and the adapter of the boot can be securely fitted and prevented from coming off.
[0013]
The adapter part is made with the constant velocity fitting cylindrical portion and the step portion to reduce the diameter through the cylindrical portion fitted on the outer periphery of the outer joint, the formation of the protrusion into the fitting cylindrical portion claims When the boot structure of the constant velocity joint according to Item 1 is used, when the adapter portion of the boot is joined to the outer portion of the constant velocity joint, the fitting cylindrical portion is placed on the outer periphery, and the stepped portion is in contact with the outer end surface. It is possible to easily position by inserting and improving the workability, and it is possible to secure the detachment by positioning the protrusion at a predetermined position.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment according to the present invention will be described with reference to FIGS.
FIG. 1 is a side view showing a partial cross section of a boot 10 according to the present embodiment.
The boot 10 includes a bellows portion 11 and an adapter portion 12 having a substantially cylindrical shape.
[0015]
The bellows portion 11 is made of rubber having flexibility, and a large-diameter end portion 11c is formed through a curved portion 11b curved so as to be turned outward from the small-diameter cylindrical portion 11a, so that the curved portion 11b is flexible. It can be deformed.
[0016]
The rubber member is bent from the large-diameter end portion 11c of the bellows portion 11 and extends to the cylindrical adapter portion 12 covering the outer periphery of the curved portion 11b, and the adapter portion 12 has a cylindrical shape. A reinforcing bracket 13 is embedded.
The adapter portion 12 includes a cylindrical portion 12a that substantially covers the bellows portion 11 and a fitting cylindrical portion 12c that is expanded in diameter via a step portion 12b, and the reinforcing metal fitting 13 is also embedded throughout the same shape.
[0017]
The reinforcing metal fitting 13 in the fitting cylindrical portion 12c has a concave portion 13a partially extending in the circumferential direction, and a protrusion 12d is formed on the inner peripheral surface of the fitting cylindrical portion 12c of the rubber member in accordance with the concave portion 13a. Has been.
[0018]
On the outer peripheral surface of the end of the small-diameter cylindrical portion 11a of the bellows portion 11, a shallow groove 11d is formed.
Such a boot 10 is manufactured by inserting a reinforcing fitting 13 and molding it integrally when a rubber member is vulcanized.
[0019]
A state in which the boot 10 is mounted on the constant velocity joint 1 is shown in FIG.
The constant velocity joint 1 is a tripod type joint and is used for a drive shaft of an automobile.
[0020]
The outer joint 2 of the constant velocity joint 1 has a cylindrical shape, and three grooves extending in the axial direction are formed at equal intervals on the inner peripheral surface, while the inner 3 is an inner shaft that is integrally connected to the drive shaft. Three tripods 3a project in the radial direction in the portion 3b, and the three tripods 3a are slidably fitted into the three grooves to transmit power.
Grooves 2a are formed at predetermined locations on the outer circumferential surface of the outer 2 in the circumferential direction.
[0021]
When the boot 10 is assembled to the constant velocity joint 1, first, the small diameter cylindrical portion 11a of the bellows portion 11 of the boot 10 is fitted into a predetermined portion of the inner shaft portion 3b, and the fastening band 15 is attached to the groove 11d on the outer peripheral surface. The three tripods 3a at the end of the inner shaft portion 3b are inserted into the grooves of the outer 2 in this state.
[0022]
Then, the fitting cylindrical portion 12 c of the adapter portion 12 of the boot 10 is fitted on the outer periphery of the opening end portion of the outer 2.
Since the fitting cylindrical part 12c of the adapter part 12 is fitted and inserted into the outer periphery of the outer part 2 until the step part 12b of the adapter part 12 comes into contact with the opening end of the outer part 2, positioning is easy and workability is good.
[0023]
Thus, when the adapter portion 12 is fitted at a predetermined position of the outer 2 of the constant velocity joint 1, the ridge 12d formed on the inner peripheral surface of the fitting cylindrical portion 12c is a groove formed on the outer peripheral surface of the outer 2. The adapter part 12 is prevented from coming off by fitting into the strip 2a.
[0024]
As described above, the boot is attached as shown in FIG. 2, and the adapter portion 12 of the boot 10 is fitted to the outer periphery of the outer 2 via the pressure contact of the rubber member. The inside is sealed in a watertight manner, preventing leakage of the lubricant to the outside and the like, and preventing entry of dust, water, etc. from the outside.
[0025]
As described above, the boot 10 is integrally manufactured by insert molding in which the reinforcing metal fitting 13 is embedded, and there is no connection process between the bellows part and the adapter part, and the manufacturing process is simple and simple.
Since the reinforcing metal fitting 13 is embedded in the rubber member and shielded from the outside world, it has excellent corrosion resistance against rust and the like, and no plating or painting is required.
[0026]
In order to fit the adapter portion 12 of the boot 10 to the outer 2 of the constant velocity joint 1, a sealing member such as an O-ring is unnecessary, the number of parts is small, and the assembling work is easy.
Thus, the processing cost of the boot 10 and the assembly cost to the constant velocity joint 1 can be reduced, and the cost can be reduced.
[0029]
【The invention's effect】
The present invention is a boot having an integral structure in which a cylindrical reinforcing bracket is embedded in an adapter portion formed continuously from a bellows portion, which can be easily manufactured by insert molding, and the reinforcing bracket of the adapter portion is exposed to the outside world. Because it does not have excellent rust corrosion resistance.
[0030]
When fitting the adapter part to the outer part of the constant velocity joint, water tightness is maintained without interposing an O-ring, the number of parts is small, and the assembly work is easy. The cost can be reduced by reducing the cost of assembling the boot to the joint.
[0031]
By adopting a boot structure in which a protrusion is formed on the inner peripheral surface of the adapter portion in the circumferential direction, the outer joint of the constant velocity joint and the adapter of the boot can be reliably fitted and prevented from coming off.
[0032]
By configuring the adapter part from the fitting cylindrical part formed with the ridge and the cylindrical part reduced in diameter through the step part, the fitting cylindrical part is inserted into the outer periphery until the step part contacts the outer end surface. Thus, the positioning can be facilitated, the workability can be improved, and the protrusion can be positioned at a predetermined position to ensure the retaining.
[Brief description of the drawings]
FIG. 1 is a side view showing a partial cross section of a boot according to an embodiment of the present invention.
FIG. 2 is a side view with a partial cross section showing a state in which the boot is mounted on a constant velocity joint.
FIG. 3 is a side view with a partial cross section showing a state in which a conventional boot is mounted on a constant velocity joint.
[Explanation of symbols]
1 ... Constant velocity joint, 2 ... Outer, 3 ... Inner,
10 ... Boots, 11 ... Bellows, 12 ... Adapters, 13 ... Reinforcing brackets, 15 ... Tightening bands .

Claims (2)

等速ジョイントのアウターに接合される円筒状をなすアダプター部と、同アダプター部に連続して延出し該等速ジョイントのインナーに他方の開口端を接合する可撓性を有するベロー部とからなるブーツにおいて、
ベロー部を構成する可撓性部材が連続して円筒状補強金具を内部に埋設して前記アダプター部を構成し、
前記円筒状補強金具に周方向に亘って凹部を形成し、
前記アダプター部の可撓性部材の内周面に前記円筒状補強金具の凹部に合わせて周方向に亘って突条がインサート成型されていることを特徴とする等速ジョイントのブーツ構造。
A cylindrical adapter part joined to the outer part of the constant velocity joint, and a flexible bellows part extending continuously from the adapter part and joining the other opening end to the inner part of the constant velocity joint. In boots,
The flexible member constituting the bellows part continuously embeds a cylindrical reinforcing bracket inside to constitute the adapter part,
Forming a concave portion in the circumferential direction in the cylindrical reinforcing bracket,
A boot structure of a constant velocity joint, characterized in that a protrusion is insert-molded on the inner peripheral surface of the flexible member of the adapter portion along the circumferential direction in accordance with the concave portion of the cylindrical reinforcing metal fitting.
前記アダプター部は、前記等速ジョイントのアウターの外周に嵌合する嵌合円筒部と段部を介して径を縮小した円筒部とからなり、前記嵌合円筒部に前記凹部と前記突条を形成したことを特徴とする請求項1記載の等速ジョイントのブーツ構造。  The adapter portion includes a fitting cylindrical portion that fits to the outer periphery of the outer periphery of the constant velocity joint and a cylindrical portion that has a diameter reduced via a step portion, and the concave portion and the protrusion are formed on the fitting cylindrical portion. The constant velocity joint boot structure according to claim 1, which is formed.
JP34711795A 1995-12-15 1995-12-15 Constant velocity joint boot structure Expired - Fee Related JP3815697B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP34711795A JP3815697B2 (en) 1995-12-15 1995-12-15 Constant velocity joint boot structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP34711795A JP3815697B2 (en) 1995-12-15 1995-12-15 Constant velocity joint boot structure

Publications (2)

Publication Number Publication Date
JPH09166150A JPH09166150A (en) 1997-06-24
JP3815697B2 true JP3815697B2 (en) 2006-08-30

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Family Applications (1)

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007040485A (en) * 2005-08-04 2007-02-15 Showa Corp Boot for self-joint
JP4596159B2 (en) * 2005-09-16 2010-12-08 Nok株式会社 Muddy water seal
JP4552875B2 (en) * 2006-03-13 2010-09-29 豊田合成株式会社 boots
CN103797260A (en) * 2011-09-21 2014-05-14 Gkn动力传动系统北美有限公司 External rolling diaphragm overmoulded high speed constant velocity joint boot
MX368122B (en) * 2013-08-01 2019-09-19 Gkn Driveline North America Inc Overmoulded profile boot can assembly.

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