JP3588479B2 - Automatic transmission oil cooler - Google Patents

Automatic transmission oil cooler Download PDF

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Publication number
JP3588479B2
JP3588479B2 JP08337494A JP8337494A JP3588479B2 JP 3588479 B2 JP3588479 B2 JP 3588479B2 JP 08337494 A JP08337494 A JP 08337494A JP 8337494 A JP8337494 A JP 8337494A JP 3588479 B2 JP3588479 B2 JP 3588479B2
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Japan
Prior art keywords
oil
pipe
flow path
flow
automatic transmission
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Expired - Lifetime
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JP08337494A
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Japanese (ja)
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JPH07293673A (en
Inventor
宗一 川上
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Tokyo Roki Co Ltd
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Tokyo Roki Co Ltd
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Priority to JP08337494A priority Critical patent/JP3588479B2/en
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Description

【0001】
【産業上の利用分野】
この発明は自動変速機のオイルクーラに関し、特に、自動車のラジエータホースの配管途中に設置される自動変速機のオイルクーラに関する。
【0002】
【従来の技術】
自動車の自動変速機においては、潤滑油の温度を適度に下げて供給することにより、潤滑油の粘度を適性に保って良好な潤滑効果を得るため、その潤滑系統にオイルクーラを配置している。このようなオイルクーラとして、図3に示すようにエンジンの冷却水を放熱するラジエータの下部に一体に取付けることにより、潤滑油と冷却水との熱交換によって潤滑油を冷却するものがある。同図では、ラジエータ1の下部に設けられた水タンク2の内部にオイルクーラ3が装着され、オイルクーラ3の接続管4が図示しない自動変速機の潤滑系統に接続可能となっている点が示されている。このような構造を有するラジエータ内蔵式オイルクーラとしては、二重管式または多板式が実用化されている。上記ラジエータ内蔵式オイルクーラのうち、図4に示す実開昭57−19027号公報に記載されたものは、ラジエータ1の下部に設けられた水タンク2の内部に積層多板式のオイルクーラ5が内蔵されている。
【0003】
そして、エンジンの冷却水を放熱するラジエータの下部に自動変速機のオイルクーラを一体に取付け、潤滑油と冷却水との熱交換により潤滑油を冷却するものがある。
【0004】
【発明が解決しようとする課題】
しかしながら、エンジンの冷却水を放熱するラジエータの下部に自動変速機のオイルクーラを一体に取付ける構造では、ラジエータの下部に自動変速機のオイルクーラ用の水タンクを設け、その中へオイルクーラを挿入することになるが、この構造ではラジエータがエンジンと道路面との間隔、即ちロードクリアランスに影響する部品であるため、エンジンルームを低くして車体を低くするのに弊害となり、また、自動変速機のオイルクーラを単独で働かせることができないという不具合があった。
【0005】
この発明は、以上の如き問題点に鑑みてなされたものであって、その目的は、ラジエータとエンジンとを連結するラジエータホースの配管の途中に設置しやすく、且つ自動変速機のオイルクーラとラジエータとを切り離してそれぞれを単独で働かせることができる自動変速機のオイルクーラを提供することにある。
【0006】
【課題を解決するための手段】
上記目的を達成するために、本発明は以下の構造を有するものである。
【0007】
すなわち、請求項1にかかる発明は、冷却水の入口管と出口管とを有する円筒管の前後部にオイル入口管およびオイル出口管をそれぞれ設けてなる自動変速機のオイルクーラにおいて、前記円筒管の内部に前記オイル入口管及びオイル出口管と連通して内筒および外筒からなる二重管構造のオイル流通管を配置して両筒間にオイル流通路を形成し、該オイル流通路は、前記オイル入口管からオイル出口管に向けてオイルが流れる第一流路と、該第一流路から反転して前記オイル入口管に向けてオイルが流れる第二流路と、該第二流路から再度反転して前記オイル出口管に向けてオイルが流れる第三流路を直列状に設定してなる一方、前記オイル流通管の少なくとも内周に冷却水流通路部を形成したことを特徴とする。
【0008】
また、請求項2にかかる発明は、前記第一、第二、第三流路は、前記内筒または外筒に形成された凸部によって区画形成されることを特徴とする。
【0009】
【実施例】
以下、この発明の実施例について添付図面を参考にして詳細に説明する。図1は、この発明に係る自動変速機のオイルクーラの実施例を示している。同図に示す自動変速機のオイルクーラは、冷却水の入口管1と、出口管2とを同軸上に有する円筒管3と、円筒管3の前部から直交する方向に連結されたオイル入口管4と、円筒管3の後部から直交する方向に連結されたオイル出口管5と、円筒管3内に同軸上に取付けられてオイル入口管4とオイル出口管5とを連通してその外周部でオイルの流通を許容するオイル流通管6とを備えて成っている。
【0010】
前記オイル流通管6は、円筒管3の内壁との間の一部に狭隘な外側冷却水通路7を有して配置された外筒6aおよび内筒6bからなる二重管構造となっており、その両端にはオイル通路と冷却水通路とを仕切る閉鎖板6c,6dが設けられている。このようなオイル流通管6は、円筒管3の湾曲部により加締められて円筒管3内に位置決めされている。両管6a、6b間には冷却フィン6eが配置されておりオイル通路を構成するオイル入口管4とオイル出口管5のそれぞれが両管6a、6bに連通されている。
【0011】
内筒6bには周方向に120度間隔で3箇所の軸方向に長い凸部6f,6g,6hが膨出形成されている。凸部6f,6g,6hは外筒6aに接しており、これによりオイル流通路が第一流路6i(凸部6f,6h間)、第二流路6j(凸部6f,6g間)、第三流路6k(凸部6g,6h間)の3路に仕切られる。
【0012】
オイル入口管4は第一流路6iにのみと連通し、第一流路6iは、オイル入口管4との連通部から、図2(b)に示すように、オイル出口管5との連通部周囲を囲う隔壁6lまで延びている。オイル出口管5の周囲は、該凸部6lと、これに連続して軸方向に延びる仕切壁6mによって囲われており、第一流路6iはオイル出口間5と連通していない。凸部6fの端部6nは前記隔壁6lとほぼ同位置に位置しており、該凸部6f,隔壁6lの間を通じて第一流路6iが第二流路6jと連通している。第二流路6jは、該第一流路6iとの連通部から、図2 (a)に示すように、前記オイル入口管4側まで延びている。凸部6gの端部6pはオイル入口管4の近傍に位置し、該凸部6g,前記閉鎖板6cの間を通じて第二流路6jが第三流路6kと連通している。第三流路6kは、該第二流路6jとの連通部から、前記図2(b)に示すように、前記オイル出口管5まで延びている。凸部6hの端部6qは前記凸部6lと同位置となっており、端部6qと閉鎖板6dの間を通じて第三流路6kがオイル出口管5と連通している。
【0013】
換言すれば、オイルは、オイル入口管4から第一流路6iをオイル出口管5に向かって流れ、第二流路6jを反転してオイル入口管4に向かって流れた後、再び第三流路6kを反転してオイル出口管5に向かって流れて該オイル出口管5に至るのである。
【0014】
一方、内筒6bの内部には内側冷却水通路8が形成され、内筒6bの両端からそれぞれ内方に収斂して冷却水を内側水通路8或いは外側冷却水通路7に円滑に流通されるための前部案内板6r、後部案内板6sが設けられている。
【0015】
以上の構成の自動変速機のオイルクーラでは、円筒管3の入口管1および出口管2のそれぞれが、エンジンとラジエータとを連結するラジエータホースの途中に接続され、自動変速機の潤滑に用いられたオイルがオイル入口管4からオイル流通管6の両管6a,6b間を入口管4側からオイル出口管5の方向へ流れて、反転してオイル出口管5から入口管4側の方向へ流れて、再び反転して入口管4側からオイル出口管5の方向へ流れてオイル出口管5から流出する。一方、入口管1から流入した冷却水は前後案内板6g、6hによりオイル流通管6の外側冷却水通路部7或いは内側冷却水通路部8を流れ、オイルがオイル流通管6内をオイルの入口管4とオイル出口管5の方向を本実施例では二度反転して流れるため、オイル流通管6の内部に配置された冷却フィン6eに有効に接触するとともに流通速度が早められる結果、オイルと冷却水の熱交換が効率よく行われてオイルが冷却される。
【0016】
なお、本実施例では第一、第二、第三流路を形成する凸部6f,6g,6hを内筒に形成したが、外筒に形成することもできる。また、オイルが二度反転して流れる例を示したが、四度反転等偶数回の反転を適宜選択することができることはいうまでもない。また、四度以上の反転回数を選択する際には、全てのオイル流通路を直列状に連続させることはなく、二度の反転系を複数並列的に設定することもできる。
【0017】
【発明の効果】
以上、実施例で詳細に説明したように、この発明に係る自動変速機のオイルクーラによれば、オイル流通管内をオイルが反転して通過するときにオイルと冷却水との熱交換が行われて効率よく冷却される。オイルクーラはエンジンとラジエータとを連結するラジエータホースの途中に接続されているため、デッドスペースであった空間部分に設置され、オイルクーラ用のラジエータの水タンクを省くことにより車体を低くしてもロードクリアランスが確保しやすくなり、また、自動変速機のオイルクーラを単独で働かせることができる効果がある。
【図面の簡単な説明】
【図1】(a)はこの発明の一実施例による縦断面図である。
(b)はこの発明の一実施例による横断面図である。
【図2】(a)はこの発明の流れを示す斜視図である。
(b)はこの発明のオイル反転部を示す斜視図である。
【図3】従来のオイルクーラを示す斜視図である。
【図4】従来のラジエータ内蔵式オイルクーラを示す縦断面図である。
【符号の説明】
1 入口管
2 出口管
3 円筒管
4 オイル入口管
5 オイル出口管
6 オイル流通管
7,8 冷却水通路
[0001]
[Industrial applications]
The present invention relates to an oil cooler for an automatic transmission, and more particularly, to an oil cooler for an automatic transmission installed in a pipe of a radiator hose of an automobile.
[0002]
[Prior art]
In an automatic transmission of an automobile, an oil cooler is arranged in the lubrication system in order to maintain a proper viscosity of the lubricating oil and obtain a good lubricating effect by supplying the lubricating oil at a moderately lowered temperature. . As such an oil cooler, as shown in FIG. 3, there is an oil cooler that cools the lubricating oil by exchanging heat between the lubricating oil and the cooling water by integrally mounting the radiator with a radiator that radiates the cooling water of the engine. In FIG. 1, an oil cooler 3 is mounted inside a water tank 2 provided below the radiator 1, and a connection pipe 4 of the oil cooler 3 can be connected to a lubrication system of an automatic transmission (not shown). It is shown. As the oil cooler with a built-in radiator having such a structure, a double tube type or a multi-plate type has been put to practical use. Among the oil coolers with a built-in radiator, the oil cooler described in Japanese Utility Model Laid-Open Publication No. 57-19027 shown in FIG. 4 has a multi-plate oil cooler 5 inside a water tank 2 provided below the radiator 1. Built-in.
[0003]
In some cases, an oil cooler of an automatic transmission is integrally attached to a lower portion of a radiator that radiates cooling water of the engine, and cools the lubricating oil by heat exchange between the lubricating oil and the cooling water.
[0004]
[Problems to be solved by the invention]
However, in the structure in which the oil cooler of the automatic transmission is integrally mounted under the radiator that radiates the cooling water of the engine, a water tank for the oil cooler of the automatic transmission is installed under the radiator, and the oil cooler is inserted into it. However, in this structure, the radiator is a component that affects the distance between the engine and the road surface, that is, the road clearance. There is a problem that the oil cooler cannot be operated alone.
[0005]
SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to easily install the radiator in the middle of a radiator hose pipe connecting the radiator and the engine, and to provide an oil cooler and a radiator for an automatic transmission. To provide an oil cooler for an automatic transmission that can operate independently of each other.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention has the following structure.
[0007]
That is, the invention according to claim 1 is an oil cooler for an automatic transmission in which an oil inlet pipe and an oil outlet pipe are respectively provided before and after a cylindrical pipe having a cooling water inlet pipe and an outlet pipe. An oil flow pipe having a double pipe structure including an inner cylinder and an outer cylinder is arranged in communication with the oil inlet pipe and the oil outlet pipe to form an oil flow passage between the two pipes. A first flow path through which oil flows from the oil inlet pipe toward the oil outlet pipe, a second flow path through which the oil flows from the first flow path toward the oil inlet pipe by inversion, and A third flow path in which the oil flows again toward the oil outlet pipe after being inverted is set in series, while a cooling water flow passage portion is formed at least on the inner periphery of the oil flow pipe.
[0008]
The invention according to claim 2 is characterized in that the first, second, and third flow paths are defined by convex portions formed in the inner cylinder or the outer cylinder.
[0009]
【Example】
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 shows an embodiment of an oil cooler for an automatic transmission according to the present invention. The oil cooler of the automatic transmission shown in FIG. 1 includes a cylindrical pipe 3 having a cooling water inlet pipe 1 and an outlet pipe 2 on the same axis, and an oil inlet connected from a front part of the cylindrical pipe 3 in a direction perpendicular to the cylindrical pipe 3. A pipe 4, an oil outlet pipe 5 connected in a direction perpendicular to the rear of the cylindrical pipe 3, and an outer periphery of the oil outlet pipe 5 which is coaxially mounted in the cylindrical pipe 3 and communicates the oil inlet pipe 4 and the oil outlet pipe 5. And an oil distribution pipe 6 that allows oil to flow therethrough.
[0010]
The oil flow pipe 6 has a double pipe structure composed of an outer cylinder 6a and an inner cylinder 6b arranged so as to have a narrow outer cooling water passage 7 in a part between the oil circulation pipe 6 and the inner wall of the cylindrical pipe 3. Closing plates 6c and 6d are provided at both ends thereof to separate an oil passage and a cooling water passage. Such an oil flow pipe 6 is crimped by the curved portion of the cylindrical pipe 3 and positioned in the cylindrical pipe 3. A cooling fin 6e is arranged between the two pipes 6a and 6b, and an oil inlet pipe 4 and an oil outlet pipe 5 constituting an oil passage are respectively connected to the two pipes 6a and 6b.
[0011]
The inner cylinder 6b is formed with three axially long convex portions 6f, 6g, 6h bulging at 120-degree intervals in the circumferential direction. The convex portions 6f, 6g, and 6h are in contact with the outer cylinder 6a, so that the oil flow passages are formed in the first flow passage 6i (between the convex portions 6f and 6h), the second flow passage 6j (between the convex portions 6f and 6g), and the second flow passage 6j. It is partitioned into three passages of three passages 6k (between the convex portions 6g and 6h).
[0012]
The oil inlet pipe 4 communicates only with the first flow path 6i, and the first flow path 6i extends from the communication part with the oil inlet pipe 4 to the periphery of the communication part with the oil outlet pipe 5 as shown in FIG. Extend to the partition 6l surrounding the. The periphery of the oil outlet pipe 5 is surrounded by the convex portion 6l and a partition wall 6m extending in the axial direction continuously from the convex portion 6l, and the first flow path 6i does not communicate with the oil outlet space 5. The end 6n of the protrusion 6f is located at substantially the same position as the partition 6l, and the first flow path 6i communicates with the second flow path 6j through the space between the protrusion 6f and the partition 6l. The second flow path 6j extends from the communication portion with the first flow path 6i to the oil inlet pipe 4 side as shown in FIG. The end 6p of the projection 6g is located near the oil inlet pipe 4, and the second flow path 6j communicates with the third flow path 6k through between the projection 6g and the closing plate 6c. The third flow path 6k extends from the communication portion with the second flow path 6j to the oil outlet pipe 5, as shown in FIG. 2B. The end 6q of the protrusion 6h is located at the same position as the protrusion 6l, and the third flow path 6k communicates with the oil outlet pipe 5 between the end 6q and the closing plate 6d.
[0013]
In other words, the oil flows from the oil inlet pipe 4 through the first flow path 6i toward the oil outlet pipe 5, reverses the second flow path 6j, flows toward the oil inlet pipe 4, and then returns to the third flow path. The path 6k is reversed and flows toward the oil outlet pipe 5 to reach the oil outlet pipe 5.
[0014]
On the other hand, an inner cooling water passage 8 is formed inside the inner cylinder 6b, and converges inward from both ends of the inner cylinder 6b to smoothly flow the cooling water to the inner water passage 8 or the outer cooling water passage 7. Guide plate 6r and rear guide plate 6s are provided.
[0015]
In the oil cooler of the automatic transmission having the above configuration, each of the inlet pipe 1 and the outlet pipe 2 of the cylindrical pipe 3 is connected in the middle of a radiator hose connecting the engine and the radiator, and is used for lubricating the automatic transmission. The oil flows from the oil inlet pipe 4 to the oil outlet pipe 5 from the oil inlet pipe 4 to the oil outlet pipe 5 from the oil inlet pipe 4 to the oil outlet pipe 5. It flows again, reverses, flows in the direction of the oil outlet pipe 5 from the inlet pipe 4 side, and flows out of the oil outlet pipe 5. On the other hand, the cooling water flowing from the inlet pipe 1 flows through the outer cooling water passage 7 or the inner cooling water passage 8 of the oil flow pipe 6 by the front and rear guide plates 6g and 6h, and the oil flows through the oil flow pipe 6 into the oil inlet. In this embodiment, since the flow direction of the pipe 4 and the oil outlet pipe 5 is reversed twice, the cooling fins 6e disposed inside the oil flow pipe 6 are effectively contacted and the flow speed is increased. The heat exchange of the cooling water is performed efficiently, and the oil is cooled.
[0016]
In this embodiment, the projections 6f, 6g, 6h forming the first, second, and third flow paths are formed in the inner cylinder, but may be formed in the outer cylinder. In addition, although an example in which the oil is inverted twice and flows is shown, it is needless to say that an even number of inversions such as a four-time inversion can be selected. Further, when selecting the number of reversals four or more times, all the oil flow passages need not be continuously connected in series, but a plurality of two reversal systems can be set in parallel.
[0017]
【The invention's effect】
As described above in detail in the embodiment, according to the oil cooler of the automatic transmission according to the present invention, heat exchange between the oil and the cooling water is performed when the oil reversely passes through the oil flow pipe. And is efficiently cooled. Since the oil cooler is connected in the middle of the radiator hose that connects the engine and the radiator, it is installed in the space that was dead space, and even if the vehicle body is lowered by omitting the water tank of the radiator for the oil cooler There is an effect that the load clearance can be easily secured and the oil cooler of the automatic transmission can be operated alone.
[Brief description of the drawings]
FIG. 1A is a longitudinal sectional view according to an embodiment of the present invention.
(B) is a cross-sectional view according to one embodiment of the present invention.
FIG. 2A is a perspective view showing the flow of the present invention.
(B) is a perspective view showing an oil reversal part of the present invention.
FIG. 3 is a perspective view showing a conventional oil cooler.
FIG. 4 is a longitudinal sectional view showing a conventional oil cooler with a built-in radiator.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Inlet pipe 2 Outlet pipe 3 Cylindrical pipe 4 Oil inlet pipe 5 Oil outlet pipe 6 Oil circulation pipe 7, 8 Cooling water passage

Claims (2)

冷却水の入口管と出口管とを有する円筒管の前後部にオイル入口管およびオイル出口管をそれぞれ設けてなる自動変速機のオイルクーラにおいて、前記円筒管の内部に前記オイル入口管及びオイル出口管と連通して内筒および外筒からなる二重管構造のオイル流通管を配置して両筒間にオイル流通路を形成し、該オイル流通路は、前記オイル入口管からオイル出口管に向けてオイルが流れる第一流路と、該第一流路から反転して前記オイル入口管に向けてオイルが流れる第二流路と、該第二流路から再度反転して前記オイル出口管に向けてオイルが流れる第三流路を直列状に設定してなる一方、前記オイル流通管の少なくとも内周に冷却水流通路部を形成したことを特徴とする自動変速機のオイルクーラ。In an oil cooler of an automatic transmission in which an oil inlet pipe and an oil outlet pipe are respectively provided before and after a cylindrical pipe having an inlet pipe and an outlet pipe for cooling water, the oil inlet pipe and the oil outlet are provided inside the cylindrical pipe. An oil flow pipe having a double pipe structure composed of an inner cylinder and an outer cylinder is arranged in communication with the pipe to form an oil flow path between the two pipes, and the oil flow path extends from the oil inlet pipe to the oil outlet pipe. A first flow path through which the oil flows toward the second flow path; a second flow path through which the oil flows from the first flow path to the oil inlet pipe; and a second flow path from which the oil flows again toward the oil outlet pipe. An oil cooler for an automatic transmission, wherein a third flow passage through which oil flows is set in series, and a cooling water flow passage portion is formed at least on an inner periphery of the oil flow pipe. 前記第一、第二、第三流路は、前記内筒または外筒に形成された凸部によって区画形成されることを特徴とする請求項1に記載の自動変速機のオイルクーラ。The oil cooler for an automatic transmission according to claim 1, wherein the first, second, and third flow paths are defined by convex portions formed on the inner cylinder or the outer cylinder.
JP08337494A 1994-04-21 1994-04-21 Automatic transmission oil cooler Expired - Lifetime JP3588479B2 (en)

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Application Number Priority Date Filing Date Title
JP08337494A JP3588479B2 (en) 1994-04-21 1994-04-21 Automatic transmission oil cooler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP08337494A JP3588479B2 (en) 1994-04-21 1994-04-21 Automatic transmission oil cooler

Publications (2)

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JPH07293673A JPH07293673A (en) 1995-11-07
JP3588479B2 true JP3588479B2 (en) 2004-11-10

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KR100770474B1 (en) * 2001-08-22 2007-10-26 한라공조주식회사 Radiator with oil-cooler able watercooled and aircooled
KR101422287B1 (en) * 2008-01-03 2014-07-22 한라비스테온공조 주식회사 Oil cooler
CN102778146B (en) * 2012-07-19 2014-03-19 无锡博利达换热器有限公司 Oil-water cooler
CN106402359A (en) * 2016-11-07 2017-02-15 株洲格尔科技有限责任公司 Cooler in driving gearbox, and cooling structure and method of driving gearbox

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