JP6291264B2 - High pressure oil cooler for construction machine and method for manufacturing the same - Google Patents

High pressure oil cooler for construction machine and method for manufacturing the same Download PDF

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JP6291264B2
JP6291264B2 JP2014009616A JP2014009616A JP6291264B2 JP 6291264 B2 JP6291264 B2 JP 6291264B2 JP 2014009616 A JP2014009616 A JP 2014009616A JP 2014009616 A JP2014009616 A JP 2014009616A JP 6291264 B2 JP6291264 B2 JP 6291264B2
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貴史 生駒
貴史 生駒
真均 井口
真均 井口
和成 川上
和成 川上
亜樹人 川上
亜樹人 川上
鈴木　勝彦
勝彦 鈴木
孝輔 瀬口
孝輔 瀬口
淑安 曹
淑安 曹
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T.RAD CO., L T D.
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Description

本発明は、主として大型の建設機械用のオイルクーラであって、高耐圧性を有するものに関する。   The present invention mainly relates to an oil cooler for a large construction machine having high pressure resistance.

大型の建設機械用高耐圧オイルクーラは、大容量で且つ、高耐圧が要求される。
特許文献１に記載の「複数熱交換器の一体化構造」には、高耐圧のオイルクーラが記載されている。このオイルクーラは、上下に配置した円形パイプからなるヘッダに偏平チューブの両端が挿通し、その挿通部がろう付け固定されている。各偏平チューブ間には、チューブ幅のコルゲートフィンが配置されている。そして容量を大きくするため、同一のオイルクーラが二列に配置され、各列の上側ヘッダどうし及び下側ヘッダどうしをマニホールドで接続したものである。 High pressure oil coolers for large construction machines are required to have a large capacity and a high pressure resistance.
The “integrated structure of a plurality of heat exchangers” described in Patent Document 1 describes a high pressure resistant oil cooler. In this oil cooler, both ends of the flat tube are inserted into headers made of circular pipes arranged above and below, and the insertion portions are brazed and fixed. Between each flat tube, the corrugated fin of the tube width is arrange | positioned. And in order to enlarge a capacity | capacitance, the same oil cooler is arrange | positioned in two rows, and the upper header and lower header of each row | line | column are connected with the manifold.

特開２００４−６０９３３号公報JP 2004-60933 A 特開平２−１７３８７号公報Japanese Patent Laid-Open No. 2-17387 特表平６−５０８９１５号公報JP-T 6-508915

上記特許文献１に記載のオイルクーラは、耐圧性を向上させるため円形パイプに多数の偏平なスリットを切削によって形成し、そのスリットに偏平チューブを挿通し、その挿通部をろう付け固定する。そして円形パイプの外面にマニホールド用の孔を穿設し、そこにマニホールドを接続固定していた。
そのため、部品点数及び制作工数が多く、量産性に欠ける欠点があった。さらには、二列の熱交換器の間に塵埃が溜まり、そのメンテナンスが面倒である欠点があった。 In the oil cooler described in Patent Document 1, a large number of flat slits are formed in a circular pipe by cutting in order to improve pressure resistance, flat tubes are inserted into the slits, and the insertion portions are brazed and fixed. And the hole for manifolds was drilled in the outer surface of the circular pipe, and the manifold was connected and fixed there.
For this reason, the number of parts and production man-hours are large, and there is a drawback that the mass productivity is lacking. Furthermore, there is a drawback that dust accumulates between the two rows of heat exchangers, and that maintenance is troublesome.

なお、特許文献３に記載の高耐圧のヘッダは、多数のスリットを有しプレス成形されたヘッダプレートと、そのヘッダプレートの両縁に被嵌される押出材からなるタンク本体とを一体にろう付け固定したものである。この構造のヘッダは、比較的製造が容易であるが、半円のヘッダプレートとヘッダ本体とのろう付け面積が小さく、ろう付けの信頼性に欠ける欠点があった。
また、一列型の熱交換器であるため、大型建設機械用の大容量のオイルクーラとする場合、より大きなものにならざるを得なかった。
そこで、本発明は大型の建設機械用のオイルクーラとして製造し易く、大容量、高耐圧で量産性が高く、塵埃がたまり難いものを提供することを課題とする。 In the high pressure resistant header described in Patent Document 3, a header plate having a large number of slits and press-molded and a tank body made of an extruded material fitted on both edges of the header plate are integrally formed. It is fixed. Although the header having this structure is relatively easy to manufacture, there is a drawback that the brazing area between the semicircular header plate and the header body is small and the brazing reliability is lacking.
In addition, since it is a single-row heat exchanger, a large capacity oil cooler for a large construction machine has to be larger.
Accordingly, an object of the present invention is to provide an oil cooler for a large construction machine that is easy to manufacture, has a large capacity, a high pressure resistance, a high mass productivity, and is difficult to collect dust.

請求項１に記載の発明は、複数列に並列された多数の偏平チューブ１３及びその並列された偏平チューブ１３間に配置されており、偏平チューブ１３の列間を横断する一体のコルゲートフィン１４からなるコア１５と、
前記偏平チューブ１３の列毎に設けられ、横断面の内周が略円形をしていて、その底部に偏平チューブ１３の端部が挿通される複数のヘッダエレメント８からなり、それらの各部品が一体に接合された建設機械用高耐圧オイルクーラであって、
前記ヘッダエレメント８は、底部が半円で、開口部が平行に対向する一対の側壁部１を有するよう全体の横断面がＵ字状に形成されていると共に、その底部に偏平なチューブ挿通孔２が長手方向に定間隔に穿設されている金属製のＵ溝材３と、
前記Ｕ溝材３の半円に略整合する半円が内面側に形成され、外周の両側が一対の側壁部１の内周に整合する一対の外嵌着面４を有する金属製の押出材よりなる門形材６とからなり、
前記門形材６の一対の外嵌着面４の外面は、平坦な面からなり、その平坦な一対の外嵌着面４と前記Ｕ溝材３の一対の側壁部１とが面接触していることを特徴とする建設機械用高耐圧オイルクーラである。 According to the first aspect of the present invention, a large number of flat tubes 13 arranged in a plurality of rows and a plurality of flat tubes 13 arranged between the flat tubes 13 are arranged, and the corrugated fins 14 that cross between the rows of the flat tubes 13 are integrated. Core 15 and
It is provided for each row of the flat tubes 13 and has a plurality of header elements 8 in which the inner periphery of the cross section is substantially circular and the end of the flat tube 13 is inserted into the bottom thereof. A high pressure oil cooler for construction machinery joined together ,
The header element 8 has a semicircular bottom and a U-shaped overall cross section so that the opening has a pair of side walls 1 facing each other in parallel, and a flat tube insertion hole at the bottom A metal U-groove member 3 in which 2 is drilled at regular intervals in the longitudinal direction;
A metal extruded material having a pair of outer fitting surfaces 4 in which a semicircle substantially matching the semicircle of the U-groove material 3 is formed on the inner surface side and both sides of the outer periphery align with the inner periphery of the pair of side wall portions 1 It consists of the gate material 6 made of
The outer surfaces of the pair of outer fitting surfaces 4 of the gate-shaped member 6 are flat surfaces, and the pair of flat outer fitting surfaces 4 and the pair of side wall portions 1 of the U-groove member 3 are in surface contact. This is a high pressure oil cooler for construction machines.

請求項２に記載の発明は、複数列に並列された多数の偏平チューブ１３及びその並列された偏平チューブ１３間に配置されており、偏平チューブ１３の列間を横断する一体のコルゲートフィン１４からなるコア１５と、
前記偏平チューブ１３の列毎に設けられ、横断面の内周が略円形をしていて、その底部に偏平チューブ１３の端部が挿通される複数のヘッダエレメント８からなり、それらの各部品が一体に接合された建設機械用高耐圧オイルクーラであって、
前記ヘッダエレメント８は、底部が半円で、開口部が平行に対向する一対の側壁部１を有するよう全体の横断面がＵ字状に形成されていると共に、その底部に偏平なチューブ挿通孔２が長手方向に定間隔に穿設されている金属製のＵ溝材３と、
前記Ｕ溝材３の半円に略整合する半円が内面側に形成され、外周の両側が一対の側壁部１の内周に整合する一対の外嵌着面４を有する金属製の押出材よりなる門形材６とからなり、
前記門形材６は、その半円形の内面に対向する外面に平坦なパイプ取付面５が形成されているものであることを特徴とする建設機械用高耐圧オイルクーラである。 According to the second aspect of the present invention, there are provided a plurality of flat tubes 13 arranged in a plurality of rows and the integrated corrugated fins 14 disposed between the parallel flat tubes 13 and traversing between the rows of the flat tubes 13. Core 15 and
It is provided for each row of the flat tubes 13 and has a plurality of header elements 8 in which the inner periphery of the cross section is substantially circular and the end of the flat tube 13 is inserted into the bottom thereof. A high pressure oil cooler for construction machinery joined together,
The header element 8 has a semicircular bottom and a U-shaped overall cross section so that the opening has a pair of side walls 1 facing each other in parallel, and a flat tube insertion hole at the bottom A metal U-groove member 3 in which 2 is drilled at regular intervals in the longitudinal direction;
A metal extruded material having a pair of outer fitting surfaces 4 in which a semicircle substantially matching the semicircle of the U-groove material 3 is formed on the inner surface side and both sides of the outer periphery align with the inner periphery of the pair of side wall portions 1 It consists of the gate material 6 made of
The gate-shaped member 6 is a high pressure oil cooler for construction machines , in which a flat pipe mounting surface 5 is formed on the outer surface facing the semicircular inner surface .

請求項３に記載の発明は、請求項２に記載の建設機械用高耐圧オイルクーラにおいて、
前記複数のヘッダエレメント８の各門形材６のパイプ取付面５には貫通孔９が形成されており、それらのパイプ取付面５の外面がそれぞれのＵ溝材３の一対の側壁部１の頂部よりも突出しており、
前記各門形材６のパイプ取付面５を横断するオイルパイプ１０を有し、
前記オイルパイプ１０には、平坦な接続面１１が形成されており、その接続面１１には、前記各門形材６の貫通孔９に整合する位置に連通孔１２が形成されており、
前記オイルパイプ１０の接続面１１と前記各門形材６のパイプ取付面５とが平面で接合されていることを特徴とする建設機械用高耐圧オイルクーラである。 The invention according to claim 3 is the high pressure oil cooler for construction machinery according to claim 2,
Through holes 9 are formed in the pipe mounting surfaces 5 of the portal members 6 of the plurality of header elements 8, and the outer surfaces of the pipe mounting surfaces 5 are formed on the pair of side wall portions 1 of the U-groove members 3. Protruding from the top,
An oil pipe 10 traversing the pipe mounting surface 5 of each of the portal members 6;
The oil pipe 10 is formed with a flat connection surface 11, and the connection surface 11 is formed with a communication hole 12 at a position aligned with the through hole 9 of each of the portal members 6,
A high pressure oil cooler for construction machines , wherein the connection surface 11 of the oil pipe 10 and the pipe mounting surface 5 of each gate member 6 are joined in a plane .

請求項４に記載の発明は、請求項２または請求項３のいずれかに記載の建設機械用高耐圧オイルクーラにおいて、
前記Ｕ溝材３の一対の側壁部１は、Ｕ溝の中心線に対してその高さが非対称であり、その一方に高側壁部１ａが配置され、他方に低側壁部１ｂが配置されており、隣り合うＵ溝材３は、一方のＵ溝材３の高側壁部１ａと他方のＵ溝材３の低側壁部１ｂとで互いに接触しており、その接触部の頂部に段差１７が形成されており、
前記段差１７にろう材が保持されるように構成されている建設機械用高耐圧オイルクーラである。 According to a fourth aspect of the present invention, in the high pressure oil cooler for construction machinery according to the second or third aspect ,
The height of the pair of side wall portions 1 of the U groove material 3 is asymmetric with respect to the center line of the U groove, and the high side wall portion 1a is disposed on one side thereof and the low side wall portion 1b is disposed on the other side. The adjacent U-groove members 3 are in contact with each other between the high sidewall portion 1a of one U-groove member 3 and the low sidewall portion 1b of the other U-groove member 3, and a step 17 is formed at the top of the contact portion. Formed,
It is a high pressure oil cooler for construction machines configured to hold a brazing material on the step 17 .

請求項５に記載の発明は、複数列に並列された多数の偏平チューブ１３及びその並列された偏平チューブ１３間に配置されており、偏平チューブ１３の列間を横断する一体のコルゲートフィン１４からなるコア１５と、
前記偏平チューブ１３の列毎に設けられ、横断面の内周が略円形をしていて、その底部に偏平チューブ１３の端部が挿通される複数のヘッダエレメント８からなり、それらの各部品が一体に接合された建設機械用高耐圧オイルクーラであって、
前記ヘッダエレメント８は、底部が半円で、開口部が平行に対向する一対の側壁部１を有するよう全体の横断面がＵ字状に形成されていると共に、その底部に偏平なチューブ挿通孔２が長手方向に定間隔に穿設されている金属製のＵ溝材３と、
前記Ｕ溝材３の半円に略整合する半円が内面側に形成され、外周の両側が一対の側壁部１の内周に整合する一対の外嵌着面４を有する金属製の押出材よりなる門形材６とからなり、
前記Ｕ溝材３の一対の側壁部１は、Ｕ溝の中心線に対してその高さが非対称であり、その一方に高側壁部１ａが配置され、他方に低側壁部１ｂが配置されており、隣り合うＵ溝材３は、一方のＵ溝材３の高側壁部１ａと他方のＵ溝材３の低側壁部１ｂとで互いに接触しており、その接触部の頂部に段差１７が形成されており、
前記段差１７にろう材が保持されるように構成されている建設機械用高耐圧オイルクーラである。 The invention according to claim 5 includes a plurality of flat tubes 13 arranged in parallel in a plurality of rows and an integrated corrugated fin 14 that is arranged between the parallel flat tubes 13 and traverses between the rows of flat tubes 13. Core 15 and
It is provided for each row of the flat tubes 13 and has a plurality of header elements 8 in which the inner periphery of the cross section is substantially circular and the end of the flat tube 13 is inserted into the bottom thereof. A high pressure oil cooler for construction machinery joined together,
The header element 8 has a semicircular bottom and a U-shaped overall cross section so that the opening has a pair of side walls 1 facing each other in parallel, and a flat tube insertion hole at the bottom A metal U-groove member 3 in which 2 is drilled at regular intervals in the longitudinal direction;
A metal extruded material having a pair of outer fitting surfaces 4 in which a semicircle substantially matching the semicircle of the U-groove material 3 is formed on the inner surface side and both sides of the outer periphery align with the inner periphery of the pair of side wall portions 1 It consists of the gate material 6 made of
The height of the pair of side wall portions 1 of the U groove material 3 is asymmetric with respect to the center line of the U groove, and the high side wall portion 1a is disposed on one side thereof and the low side wall portion 1b is disposed on the other side. The adjacent U-groove members 3 are in contact with each other between the high sidewall portion 1a of one U-groove member 3 and the low sidewall portion 1b of the other U-groove member 3, and a step 17 is formed at the top of the contact portion. Formed,
It is a high pressure oil cooler for construction machines configured to hold a brazing material on the step 17.

請求項６に記載の発明は、請求項１〜請求項３のいずれかに記載の建設機械用高耐圧オイルクーラの製造方法において、
前記コア１５を構成するコルゲートフィン１４と偏平チューブ１３との間および、その偏平チューブ１３とＵ溝材３との間がろう付により接合されるろう付工程と、
前記門形材６とＵ溝材３の先端部とが溶接により接合される溶接工程と、を有する建設機械用高耐圧オイルクーラの製造方法である。 Invention of Claim 6 in the manufacturing method of the high pressure | pressure-resistant oil cooler for construction machines in any one of Claims 1-3 ,
Between the corrugated fins 14 and the flat tubes 13 constituting the core 15 and the wandering with steps is joined by brazing between the flat tubes 13 and the U-groove member 3,
A welding step of the tip portion of the gantry member 6 and the U-groove member 3 Ru are joined by welding, it is a manufacturing method for a construction machine for high-voltage oil cooler having.

請求項１に記載の本発明は、複数列に並列された多数の偏平チューブ１３及びその並列された偏平チューブ１３間に配置され、偏平チューブ１３の列間を横断する一体のコルゲートフィン１４からなるコア１５と、偏平チューブ１３の列ごとに設けられ、横断面の内周が略円形をしていて、その底部に偏平チューブ１３の端部が挿通される複数のヘッダエレメント８からなり、そのヘッダエレメント８が断面の内周で独立しているため、耐圧性が高い。
また、偏平チューブ１３の列間を横断する一体のコルゲートフィン１４からなるコア１５であるため、偏平チューブ間に隙間が生じず、それらの間に塵埃が溜まることを防ぎ、メンテナンス性のよいオイルクーラとなる。
さらに、ヘッダエレメント８が、Ｕ溝材３と門形材６とからなり、Ｕ溝部３はプレス成形されて、その底部に偏平なチューブ挿通孔２が穿設され、門形部材６は、押出材よりなり内面側に半円が形成され、外周の両側が一対の平坦な外嵌着面４を有し、Ｕ溝材３の側壁１とが面接触しているから、そのＵ溝材３と、門形材６との接合面積が大きく、耐圧性が高いと共に、その製造が容易で量産性の高いオイルクーラとなる。 The present invention according to claim 1 includes a plurality of flat tubes 13 arranged in parallel in a plurality of rows and an integral corrugated fin 14 disposed between the parallel flat tubes 13 and traversing between the rows of flat tubes 13. The header 15 is provided for each row of the core 15 and the flat tube 13, and has a plurality of header elements 8 in which the inner periphery of the cross section is substantially circular and the end of the flat tube 13 is inserted into the bottom thereof. Since the element 8 is independent on the inner periphery of the cross section, the pressure resistance is high.
In addition, since the core 15 is composed of the integral corrugated fins 14 crossing between the rows of the flat tubes 13, no gaps are formed between the flat tubes, dust is prevented from accumulating between them, and an oil cooler with good maintainability. It becomes.
Further, the header element 8 is composed of a U-groove material 3 and a gate-shaped material 6, the U-groove portion 3 is press-molded, and a flat tube insertion hole 2 is formed at the bottom thereof, and the portal-shaped member 6 is extruded. A semicircle is formed on the inner surface side made of a material, both sides of the outer periphery have a pair of flat outer fitting surfaces 4, and the U-groove material 3 is in surface contact with the side wall 1 of the U-groove material 3. In addition, an oil cooler having a large joint area with the gate-shaped member 6 and high pressure resistance, and easy to manufacture and high in mass productivity.

請求項２に記載の本発明は、門形材６の外面に平坦なパイプ取付面５が形成されたものであるから、オイルパイプ１０との接合部の接合面も広く且つ、安定した接触面が得られ、耐圧性の高いオイルクーラとなる。
請求項３に記載の本発明は、各門形材のパイプ取付面５と、オイルパイプ１０の接続面１１は互いに平坦に形成され、それらの貫通孔９と連通孔１２とが整合して、互いに接合固定されるものであるから、ヘッダエレメント８どうしの接合強度を強くして、信頼性の高い、建設機械用高耐圧のオイルクーラを提供できる。 In the present invention according to claim 2, since the flat pipe mounting surface 5 is formed on the outer surface of the gate-shaped member 6, the joint surface of the joint portion with the oil pipe 10 is also wide and stable. And an oil cooler with high pressure resistance.
According to the third aspect of the present invention, the pipe mounting surface 5 of each gate-shaped member and the connection surface 11 of the oil pipe 10 are formed flat with each other, and the through hole 9 and the communication hole 12 are aligned, Since they are joined and fixed to each other, the joining strength between the header elements 8 can be increased, and a highly reliable oil pressure cooler for construction machines with high reliability can be provided.

請求項４または請求項５に記載の本発明は、Ｕ溝材３の一対の側壁部１は、Ｕ溝の中心線に対してその高さが非対称で、一方のＵ溝材３の高側壁部１ａと他方のＵ溝材３の低側壁部１ｂとで互いに接触し、その接触部の頂部に段差１７が形成され、その段差１７にろう材が保持されるように構成したから、それらの接合部のろう付け面も広く且つ、安定した接触面が得られ、ろう付けおよび、耐圧性の高いオイルクーラとなる。 According to the present invention described in claim 4 or 5 , the pair of side wall portions 1 of the U groove material 3 is asymmetric in height with respect to the center line of the U groove, and the high side wall of one U groove material 3 Since the portion 1a and the lower side wall portion 1b of the other U-groove member 3 are in contact with each other, a step 17 is formed at the top of the contact portion, and the brazing material is held at the step 17, The brazed surface of the joint is wide and a stable contact surface is obtained, resulting in an oil cooler with high brazing and pressure resistance.

請求項６に記載の発明は、コア１５を構成するコルゲートフィン１４と偏平チューブ１３との間および、その偏平チューブ１３とヘッダエレメント８との間がろう付けにより接合されるため、量産性の高いものとなる。それと共に、門形材６とＵ溝材３の先端部とは溶接接合され、その接合強度を強くできる。 According to the sixth aspect of the present invention, since the corrugated fin 14 and the flat tube 13 constituting the core 15 and the flat tube 13 and the header element 8 are joined by brazing, the mass productivity is high. It will be a thing. At the same time, the portal member 6 and the tip end portion of the U-groove member 3 are welded and joined, and the joining strength can be increased.

本発明のオイルクーラであって、図４におけるI−I矢視断面図。It is an oil cooler of this invention, Comprising: The II sectional view taken on the line in FIG. 同図４のII−II矢視断面図。II-II arrow sectional drawing of the same FIG. 同オイルクーラのＵ溝材３と門形材６とを並列した状態を示すものであって、チューブ挿通孔２の位置における横断面図。The cross-sectional view in the position of the tube penetration hole 2 shows the state which arranged the U-groove material 3 and the gate-shaped material 6 of the oil cooler in parallel. 同オイルクーラの組立て分解斜視図。The assembly exploded perspective view of the oil cooler. 本発明のオイルクーラの他の実施例を示す要部横断面図。The principal part cross-sectional view which shows the other Example of the oil cooler of this invention. 同オイルクーラであって、門形材６とオイルパイプ10との接合方法を示す図。The figure which is the same oil cooler, Comprising: The figure which shows the joining method of the gate-shaped material 6 and the oil pipe 10. FIG. 本発明のオイルクーラのさらに他の実施例を示す要部横断面図。The principal part cross-sectional view which shows the further another Example of the oil cooler of this invention.

次に、図面に基づいて本発明の実施の形態につき説明する。
本発明のオイルクーラは、大型建設機械に用いられる高耐圧で大容量のオイルクーラである。
図４に示す如く、この例では３列に並列されたヘッダエレメント８が上下（下側を省略）に配置されている。各ヘッダエレメント８は、U溝材３とその開口部に嵌着される門形材６と、その両端を被蔽する一対の蓋材７とからなる。 Next, embodiments of the present invention will be described with reference to the drawings.
The oil cooler of the present invention is a high pressure and large capacity oil cooler used for large construction machines.
As shown in FIG. 4, in this example, the header elements 8 arranged in three rows are arranged vertically (the lower side is omitted). Each header element 8 includes a U-shaped groove member 3, a gate-shaped member 6 fitted in the opening thereof, and a pair of lid members 7 covering both ends thereof.

そのU溝材３は、図３に示す如く、金属板のプレス成形により、全体の断面がU字状に形成されると共に、その底部の断面が半円で開口部が互いに平行に対向する一対の側壁部１を有する。その側壁部１は同図に示す如く、中心線Lに対して一方側に高側壁部１aが形成され、他方側に低側壁部１bが形成されて、両側壁部は非対称である。両側壁部の高さは底部の半円の略半径である。そして、U溝材３の底部にはチューブ挿通孔２がU溝材３の長手方向に定間隔に離間してプレス成形により形成されている。   As shown in FIG. 3, the U groove member 3 is formed by pressing a metal plate so that the entire cross section is formed in a U-shape, and the bottom cross section is a semicircle and the openings are parallel to each other. Side wall portion 1. As shown in the figure, the side wall 1 is formed with a high side wall 1a on one side with respect to the center line L and a low side wall 1b on the other side, and both side walls are asymmetric. The height of both side walls is approximately the radius of the semicircle at the bottom. A tube insertion hole 2 is formed at the bottom of the U-groove member 3 by press molding at regular intervals in the longitudinal direction of the U-groove member 3.

さらに、そのチューブ挿通孔２の並列方向両端位置にサイドメンバー16の端部が嵌入するメンバー嵌入孔2aが形成されている。そのメンバー嵌入孔2aは好ましくは、チューブ挿通孔２と同一に形成し且つ、そのサイドメンバー16の端部には、偏平チューブ13の外周に整合する三つの凸部を幅方向に並列し、その各凸部が各ヘッダエレメント８のメンバー嵌入孔2aに挿通される。   Furthermore, member insertion holes 2a into which the end portions of the side members 16 are inserted are formed at both ends of the tube insertion hole 2 in the parallel direction. The member insertion hole 2a is preferably formed to be the same as the tube insertion hole 2, and at the end of the side member 16, three convex portions aligned with the outer periphery of the flat tube 13 are juxtaposed in the width direction. Each convex portion is inserted through the member insertion hole 2a of each header element 8.

この例では、ヘッダエレメント８が３列に形成されているが、それを２列に、又は４列以上に並列させることもできる。そして、各ヘッダエレメント８のU溝材３のチューブ挿通孔２には、夫々、偏平チューブ13の両端が挿通される。
さらに、この例では３列に配置された偏平チューブ13のチューブ列の幅方向の全幅に略等しい幅のコルゲートフィン14が各偏平チューブ13間に配置され、全体が組み立てられた状態で高温の炉内で各部品間が一体にろう付け固定される。各部品の少なくとも一方には、予めろう材が被覆又は塗布されている。 In this example, the header elements 8 are formed in three rows. However, the header elements 8 may be arranged in two rows or in four or more rows. Then, both ends of the flat tube 13 are inserted into the tube insertion holes 2 of the U groove material 3 of each header element 8.
Further, in this example, the corrugated fins 14 having a width substantially equal to the entire width in the width direction of the tube rows of the flat tubes 13 arranged in three rows are arranged between the flat tubes 13 and the high temperature furnace is assembled as a whole. The parts are integrally brazed and fixed inside. At least one of the parts is previously coated or coated with a brazing material.

隣接するヘッダエレメント８は、図３に示す如く、その高側壁部1aと低側壁部1bとが互いに接触し、そこに段差17が形成される。このような段差17には、図1に示す如く、そこにろう材18のフィレット、即ちろう溜りが形成され、各ヘッダエレメント８間にそのろう材を供給して、各ヘッダエレメント間を確実にろう付け固定する。
門形材６は、押出成形材からなり、U溝材３の半円に略整合する半円が内面側に形成され。その両側がU溝材３の側壁部１の内側壁に整合する外嵌着面４を有し、その外嵌着面４に対して半円側と反対の外面に平坦なパイプ取付面５が形成されている。U溝材３及び門形材６は、一例としてアルミニウム材からなる。 As shown in FIG. 3, adjacent header elements 8 have their high side wall portions 1a and low side wall portions 1b in contact with each other, and a step 17 is formed there. As shown in FIG. 1, a fillet of brazing material 18, that is, a brazing pool, is formed in such a step 17, and the brazing material is supplied between the header elements 8, so that the space between the header elements is ensured. Fix with brazing.
The gate-shaped material 6 is made of an extruded material, and a semicircle that substantially matches the semicircle of the U-groove material 3 is formed on the inner surface side. Both sides have an outer fitting surface 4 aligned with the inner wall of the side wall portion 1 of the U-groove member 3, and a flat pipe mounting surface 5 is provided on the outer surface opposite to the semicircular side with respect to the outer fitting surface 4. Is formed. The U groove material 3 and the gate-shaped material 6 are made of an aluminum material as an example.

パイプ取付面５は、より詳しくは台形状に形成され、そのパイプ取付面５の頂部が高側壁部1aの頂部よりも僅かに外側に位置する。そして、門形材６をU溝材３に嵌着したとき、その外嵌着面４と側壁部１の高側壁部1a及び低側壁部1bとが接触すると共に、門形材６の内面とチューブ挿通孔２の底部とで横断面が略円形に形成される。
図３から明らかなように、パイプ取付面５の外嵌着面４と側壁部１とは略半円近く各平面が接触し、広いろう付け面を確保する。各門形材６には、その長手方向中間位置にオイルの出入口となる一つの貫通孔９が後加工により穿設される。 More specifically, the pipe mounting surface 5 is formed in a trapezoidal shape, and the top of the pipe mounting surface 5 is located slightly outside the top of the high side wall portion 1a. When the gate-shaped member 6 is fitted to the U-groove member 3, the outer fitting surface 4 and the high-side wall portion 1a and the low-side wall portion 1b of the side-wall portion 1 are in contact with each other, The cross section is formed in a substantially circular shape with the bottom of the tube insertion hole 2.
As apparent from FIG. 3, the outer fitting surface 4 of the pipe mounting surface 5 and the side wall portion 1 are almost in contact with each other in a nearly semicircular shape, thereby securing a wide brazed surface. Each gate-shaped member 6 is provided with one through-hole 9 serving as an oil inlet / outlet at an intermediate position in the longitudinal direction by post-processing.

次に、オイルパイプ10は、一例としてアルミニウム製の鋳物からなり、その外周が略半円形でその底面が平坦に形成された接続面11を有し、その一端は図１に示す如く閉塞されていると共に他端が開口し、その開口部外周にフランジ部21が形成される。さらに、そのオイルパイプ10の平坦な接続面11には、貫通孔９に整合させて連通孔12が後加工により穿設されている。
また、フランジ部21の端面にはゴム製シールリングが嵌着する環状溝19が形成されている。さらに、オイルパイプ10のフランジ部21には、図４に示す如く、その直径線上にボルト孔20が穿設され、図示しないボルトを介してオイル配管の端部と連結される。 Next, the oil pipe 10 is made of an aluminum casting, for example, and has a connection surface 11 whose outer periphery is substantially semicircular and whose bottom surface is flat, and one end of which is closed as shown in FIG. And the other end opens, and a flange portion 21 is formed on the outer periphery of the opening. Further, a communication hole 12 is formed in the flat connection surface 11 of the oil pipe 10 by post-processing so as to align with the through hole 9.
An annular groove 19 into which a rubber seal ring is fitted is formed on the end surface of the flange portion 21. Further, as shown in FIG. 4, a bolt hole 20 is formed in the flange portion 21 of the oil pipe 10 on the diameter line, and is connected to an end portion of the oil pipe via a bolt (not shown).

（作用）
本発明のオイルクーラは、複数の独立したヘッダエレメント８が互いにその側壁部１で接触して並列され、その各ヘッダエレメント８は、断面の内周が略円形に形成されているため、耐圧性が高い。また、Ｕ溝材３と門形材６とは互いに平行平面で接触してろう付けされているため、ろう付け面積が大きく、両者の接続部の耐圧性も高い。そのヘッダエレメント８のＵ溝材３は、プレス成形されて多数のチューブ挿通孔２が穿設されたものであるから、製造容易で量産性が高い。そして門形材６は押出成形材よりなるが、それに貫通孔９を穿設したものであるから、その加工も容易である。 (Function)
In the oil cooler of the present invention, a plurality of independent header elements 8 are in contact with each other at the side wall portion 1 and arranged in parallel, and each header element 8 has a substantially circular inner periphery in cross section. Is expensive. Moreover, since the U-groove material 3 and the gate-shaped material 6 are brazed in contact with each other in parallel planes, the brazed area is large and the pressure resistance of the connecting portion between them is high. Since the U-groove material 3 of the header element 8 is press-molded and provided with a large number of tube insertion holes 2, it is easy to manufacture and has high productivity. The gate-shaped member 6 is made of an extrusion-molded material. Since the through-hole 9 is formed in the gate-shaped member 6, it can be easily processed.

また、各門形材６のパイプ取付面５と、オイルパイプ10の接続面11は互いに平坦に形成され、それらの貫通孔９と連通孔12とが整合して、互いにろう付け固定されるものであるから、それらの接合部のろう付け面も広く且つ、安定した接触面が得られ、ろう付けおよび、耐圧の信頼性が高い。その結果、本オイルクーラは、その製造が容易で量産性が高く、高耐圧、大容量のものとなる。
また、複数の独立したヘッダエレメント８が互いに側壁部１で接触して並列され、その偏平チューブ列の幅方向の厚みに略整合する幅のコルゲートフィン14が各偏平チューブ13間に配置されてコア15を形成し、その状態で、前記各部品の各接触部間を一体にろう付け固定したから、ヘッダエレメント間に隙間が生じない。それと共に、コア15が一体に形成され、それらの間に塵埃が溜まることを防ぎ、メンテナンス性のよいオイルクーラとなる。 Also, the pipe mounting surface 5 of each gate-shaped member 6 and the connection surface 11 of the oil pipe 10 are formed flat with each other, and the through holes 9 and the communication holes 12 are aligned and fixed to each other by brazing. Therefore, the brazing surfaces of these joints are wide and a stable contact surface can be obtained, and the brazing and withstand voltage reliability is high. As a result, the oil cooler is easy to manufacture, has high mass productivity, and has a high pressure resistance and a large capacity.
Further, a plurality of independent header elements 8 are arranged in contact with each other at the side wall 1 and arranged in parallel, and corrugated fins 14 having a width substantially matching the thickness in the width direction of the flat tube rows are disposed between the flat tubes 13 15 is formed, and in this state, the contact portions of the parts are integrally brazed and fixed, so that no gap is generated between the header elements. At the same time, the core 15 is integrally formed, and dust is prevented from accumulating between them, thus providing an oil cooler with good maintainability.

さらに、Ｕ溝材３の一対の側壁部１を左右非対称として、隣り合うＵ溝材３の接触部の頂部に段差17を設け、その段差にろう材が保持されるように構成した場合には、ヘッダエレメント８どうしの接合強度を強くして、信頼性の高い、建設機械用高耐圧のオイルクーラとなる。   Further, when the pair of side wall portions 1 of the U groove material 3 is asymmetrical, a step 17 is provided at the top of the contact portion of the adjacent U groove material 3, and the brazing material is held at the step. The joining strength between the header elements 8 is increased, so that a reliable, high pressure oil cooler for construction machines is obtained.

（第２実施例）
次に、図５、図６は本発明の第２実施例の横断面図及び平面図である。この例が図２の例と異なる点は、各Ｕ溝材３の間が互いに離間している点と、各Ｕ溝材３と門形材６との接合方法及び、その門形材６とオイルパイプ10との接合方法である。
前記の第１実施例では各部品間は全て、ろう付けにより一体に接合されたが、この実施例では、先ず、各Ｕ溝材３と門形材６との間が、図５に示す如く、溶接により接合され、次いで、その門形材６とオイルパイプ10との間も、図６に示す如く、溶接により接合されている。なお、偏平チューブ13とコルゲートフィン14とＵ溝材３の各間は、ろう付けにより接合されている。 (Second embodiment)
5 and 6 are a cross-sectional view and a plan view of a second embodiment of the present invention. This example is different from the example of FIG. 2 in that the U-groove members 3 are separated from each other, the joining method of each U-groove member 3 and the gate-shaped member 6, and the portal-shaped member 6 This is a joining method with the oil pipe 10.
In the first embodiment, all the parts are integrally joined by brazing, but in this embodiment, first, the space between each U-groove material 3 and the gate-shaped material 6 is as shown in FIG. Then, the gate member 6 and the oil pipe 10 are also joined by welding as shown in FIG. In addition, each of the flat tube 13, the corrugated fin 14, and the U-groove material 3 is joined by brazing.

（第３実施例）
次に、図７は本発明のさらに他の実施例であり、この例が図５の例と異なる点は、複数のＵ溝材３の外面どうしが、接触し、その接触部が互いにろう付けにより接合されている。そして、各Ｕ溝材３と門形材６とは溶接22により接合され、その門形材６とオイルパイプ10も溶接により接合されたものである。 (Third embodiment)
Next, FIG. 7 shows still another embodiment of the present invention. This example is different from the example of FIG. 5 in that the outer surfaces of a plurality of U-groove members 3 are in contact with each other and the contact portions are brazed to each other. It is joined by. Each U-groove member 3 and the gate member 6 are joined by welding 22, and the gate member 6 and the oil pipe 10 are also joined by welding.

１ 側壁部
1a 高側壁部
1b 低側壁部
２ チューブ挿通孔
2a メンバー嵌入孔
３ Ｕ溝材
４ 外嵌着面
５ パイプ取付面 1 Side wall
1a High side wall
1b Low side wall 2 Tube insertion hole
2a Member insertion hole 3 U groove material 4 Outer fitting surface 5 Pipe mounting surface

６ 門形材
７ 蓋材
８ ヘッダエレメント
９ 貫通孔
10 オイルパイプ
11 接続面
12 連通孔
13 偏平チューブ 6 Gate material 7 Cover material 8 Header element 9 Through hole
10 Oil pipe
11 Connection surface
12 communication hole
13 Flat tube

14 コルゲートフィン
15 コア
16 サイドメンバー
17 段差
18 ろう材
19 環状溝
20 ボルト孔
21 フランジ部
22 溶接部 14 Corrugated fin
15 core
16 Side members
17 steps
18 Brazing material
19 Annular groove
20 bolt hole
21 Flange
22 welds

Claims (6)

複数列に並列された多数の偏平チューブ（１３）及びその並列された偏平チューブ（１３）間に配置されており、偏平チューブ（１３）の列間を横断する一体のコルゲートフィン（１４）からなるコア（１５）と、
前記偏平チューブ（１３）の列毎に設けられ、横断面の内周が略円形をしていて、その底部に偏平チューブ（１３）の端部が挿通される複数のヘッダエレメント（８）からなり、それらの各部品が一体に接合された建設機械用高耐圧オイルクーラであって、
前記ヘッダエレメント（８）は、底部が半円で、開口部が平行に対向する一対の側壁部（１）を有するよう全体の横断面がＵ字状に形成されていると共に、その底部に偏平なチューブ挿通孔（２）が長手方向に定間隔に穿設されている金属製のＵ溝材（３）と、
前記Ｕ溝材（３）の半円に略整合する半円が内面側に形成され、外周の両側が一対の側壁部（１）の内周に整合する一対の外嵌着面（４）を有する金属製の押出材よりなる門形材（６）とからなり、
前記門形材（６）の一対の外嵌着面（４）の外面は、平坦な面からなり、その平坦な一対の外嵌着面（４）と前記Ｕ溝材（３）の一対の側壁部（１）とが面接触していることを特徴とする建設機械用高耐圧オイルクーラ。 It is arranged between a plurality of flat tubes (13) arranged in parallel in a plurality of rows and the flat tubes (13) arranged in parallel, and is composed of an integral corrugated fin (14) traversing between the rows of flat tubes (13). A core (15);
It is provided for each row of the flat tubes (13), and has a plurality of header elements (8) in which the inner periphery of the cross section is substantially circular and the end of the flat tube (13) is inserted into the bottom. , A high pressure oil cooler for construction machinery in which these parts are joined together ,
The header element (8) has a semicircular bottom and a U-shaped overall cross section so that the opening has a pair of side walls (1) facing in parallel. A metal U-groove material (3) in which a long tube insertion hole (2) is formed at regular intervals in the longitudinal direction;
A semicircle that is substantially aligned with the semicircle of the U-groove material (3) is formed on the inner surface side, and a pair of outer fitting surfaces (4) that align both sides of the outer periphery with the inner periphery of the pair of side wall portions (1). It consists of a gate-shaped material (6) made of a metal extruded material,
The outer surfaces of the pair of outer fitting surfaces (4) of the gate-shaped member (6) are flat surfaces, and the pair of flat outer fitting surfaces (4) and the pair of U-groove members (3) are paired. A high pressure oil cooler for construction machines, wherein the side wall (1) is in surface contact . 複数列に並列された多数の偏平チューブ（１３）及びその並列された偏平チューブ（１３）間に配置されており、偏平チューブ（１３）の列間を横断する一体のコルゲートフィン（１４）からなるコア（１５）と、
前記偏平チューブ（１３）の列毎に設けられ、横断面の内周が略円形をしていて、その底部に偏平チューブ（１３）の端部が挿通される複数のヘッダエレメント（８）からなり、それらの各部品が一体に接合された建設機械用高耐圧オイルクーラであって、
前記ヘッダエレメント（８）は、底部が半円で、開口部が平行に対向する一対の側壁部（１）を有するよう全体の横断面がＵ字状に形成されていると共に、その底部に偏平なチューブ挿通孔（２）が長手方向に定間隔に穿設されている金属製のＵ溝材（３）と、
前記Ｕ溝材（３）の半円に略整合する半円が内面側に形成され、外周の両側が一対の側壁部（１）の内周に整合する一対の外嵌着面（４）を有する金属製の押出材よりなる門形材（６）とからなり、
前記門形材（６）は、その半円形の内面に対向する外面に平坦なパイプ取付面（５）が形成されているものであることを特徴とする建設機械用高耐圧オイルクーラ。 It is arranged between a plurality of flat tubes (13) arranged in parallel in a plurality of rows and the flat tubes (13) arranged in parallel, and is composed of an integral corrugated fin (14) traversing between the rows of flat tubes (13). A core (15);
It is provided for each row of the flat tubes (13), and has a plurality of header elements (8) in which the inner periphery of the cross section is substantially circular and the end of the flat tube (13) is inserted into the bottom. , A high pressure oil cooler for construction machinery in which these parts are joined together ,
The header element (8) has a semicircular bottom and a U-shaped overall cross section so that the opening has a pair of side walls (1) facing in parallel. A metal U-groove material (3) in which a long tube insertion hole (2) is formed at regular intervals in the longitudinal direction;
A semicircle that is substantially aligned with the semicircle of the U-groove material (3) is formed on the inner surface side, and a pair of outer fitting surfaces (4) that align both sides of the outer periphery with the inner periphery of the pair of side wall portions (1). It consists of a gate-shaped material (6) made of a metal extruded material,
The gate-shaped material (6) is a high pressure oil cooler for construction machines, characterized in that a flat pipe mounting surface (5) is formed on the outer surface facing the semicircular inner surface . 請求項２に記載の建設機械用高耐圧オイルクーラにおいて、
前記複数のヘッダエレメント（８）の各門形材（６）のパイプ取付面（５）には貫通孔（９）が形成されており、それらのパイプ取付面（５）の外面がそれぞれのＵ溝材（３）の一対の側壁部（１）の頂部よりも突出しており、
前記各門形材（６）のパイプ取付面（５）を横断するオイルパイプ（１０）を有し、
前記オイルパイプ（１０）には、平坦な接続面（１１）が形成されており、その接続面（１１）には、前記各門形材（６）の貫通孔（９）に整合する位置に連通孔（１２）が形成されており、
前記オイルパイプ（１０）の接続面（１１）と前記各門形材（６）のパイプ取付面（５）とが平面で接合されていることを特徴とする建設機械用高耐圧オイルクーラ。 The high pressure oil cooler for construction machine according to claim 2 ,
Through holes (9) are formed in the pipe mounting surface (5) of each portal member (6) of the plurality of header elements (8), and the outer surfaces of the pipe mounting surfaces (5) are respectively U-shaped. Projecting from the top of the pair of side wall portions (1) of the groove member (3),
An oil pipe (10) traversing the pipe mounting surface (5) of each of the portal members (6),
The oil pipe (10) has a flat connection surface (11), and the connection surface (11) is in a position aligned with the through hole (9) of each of the portal members (6). A communication hole (12) is formed,
A high pressure oil cooler for construction machines , wherein a connecting surface (11) of the oil pipe (10) and a pipe mounting surface (5) of each of the gate-shaped members (6) are joined in a plane . 請求項２または請求項３のいずれかに記載の建設機械用高耐圧オイルクーラにおいて、
前記Ｕ溝材（３）の一対の側壁部（１）は、Ｕ溝の中心線に対してその高さが非対称であり、その一方に高側壁部（１ａ）が配置され、他方に低側壁部（１ｂ）が配置されており、隣り合うＵ溝材（３）は、一方のＵ溝材（３）の高側壁部（１ａ）と他方のＵ溝材（３）の低側壁部（１ｂ）とで互いに接触しており、その接触部の頂部に段差（１７）が形成されており、
前記段差（１７）にろう材が保持されるように構成されている建設機械用高耐圧オイルクーラ。 In the high pressure-resistant oil cooler for construction machines in any one of Claim 2 or Claim 3 ,
The pair of side wall portions (1) of the U-groove material (3) has an asymmetric height with respect to the center line of the U groove, a high side wall portion (1a) is disposed on one side, and a low side wall is disposed on the other side. The portion (1b) is arranged, and the adjacent U-groove material (3) includes a high side wall portion (1a) of one U-groove material (3) and a low side wall portion (1b) of the other U-groove material (3). ), And a step (17) is formed at the top of the contact portion,
A high pressure oil cooler for construction machines configured to hold a brazing material at the step (17) . 複数列に並列された多数の偏平チューブ（１３）及びその並列された偏平チューブ（１３）間に配置されており、偏平チューブ（１３）の列間を横断する一体のコルゲートフィン（１４）からなるコア（１５）と、
前記偏平チューブ（１３）の列毎に設けられ、横断面の内周が略円形をしていて、その底部に偏平チューブ（１３）の端部が挿通される複数のヘッダエレメント（８）からなり、それらの各部品が一体に接合された建設機械用高耐圧オイルクーラであって、
前記ヘッダエレメント（８）は、底部が半円で、開口部が平行に対向する一対の側壁部（１）を有するよう全体の横断面がＵ字状に形成されていると共に、その底部に偏平なチューブ挿通孔（２）が長手方向に定間隔に穿設されている金属製のＵ溝材（３）と、
前記Ｕ溝材（３）の半円に略整合する半円が内面側に形成され、外周の両側が一対の側壁部（１）の内周に整合する一対の外嵌着面（４）を有する金属製の押出材よりなる門形材（６）とからなり、
前記Ｕ溝材（３）の一対の側壁部（１）は、Ｕ溝の中心線に対してその高さが非対称であり、その一方に高側壁部（１ａ）が配置され、他方に低側壁部（１ｂ）が配置されており、隣り合うＵ溝材（３）は、一方のＵ溝材（３）の高側壁部（１ａ）と他方のＵ溝材（３）の低側壁部（１ｂ）とで互いに接触しており、その接触部の頂部に段差（１７）が形成されており、
前記段差（１７）にろう材が保持されるように構成されている建設機械用高耐圧オイルクーラ。 It is arranged between a plurality of flat tubes (13) arranged in parallel in a plurality of rows and the flat tubes (13) arranged in parallel, and is composed of an integral corrugated fin (14) traversing between the rows of flat tubes (13). A core (15);
It is provided for each row of the flat tubes (13), and has a plurality of header elements (8) in which the inner periphery of the cross section is substantially circular and the end of the flat tube (13) is inserted into the bottom. , A high pressure oil cooler for construction machinery in which these parts are joined together,
The header element (8) has a semicircular bottom and a U-shaped overall cross section so that the opening has a pair of side walls (1) facing in parallel. A metal U-groove material (3) in which a long tube insertion hole (2) is formed at regular intervals in the longitudinal direction;
A semicircle that is substantially aligned with the semicircle of the U-groove material (3) is formed on the inner surface side, and a pair of outer fitting surfaces (4) that align both sides of the outer periphery with the inner periphery of the pair of side wall portions (1). It consists of a gate-shaped material (6) made of a metal extruded material,
The pair of side wall portions (1) of the U-groove material (3) has an asymmetric height with respect to the center line of the U groove, a high side wall portion (1a) is disposed on one side, and a low side wall is disposed on the other side. The portion (1b) is arranged, and the adjacent U-groove material (3) includes a high side wall portion (1a) of one U-groove material (3) and a low side wall portion (1b) of the other U-groove material (3). ), And a step (17) is formed at the top of the contact portion,
A high pressure oil cooler for construction machines configured to hold a brazing material at the step (17). 請求項１〜請求項３のいずれかに記載の建設機械用高耐圧オイルクーラの製造方法において、
前記コア（１５）を構成するコルゲートフィン（１４）と偏平チューブ（１３）との間および、その偏平チューブ（１３）とＵ溝材（３）との間がろう付により接合されるろう付工程と、
前記門形材（６）とＵ溝材（３）の先端部とが溶接により接合される溶接工程と、を有する建設機械用高耐圧オイルクーラの製造方法。 In the manufacturing method of the high pressure | voltage resistant oil cooler for construction machines in any one of Claims 1-3 ,
A brazing process in which the corrugated fin (14) constituting the core (15) and the flat tube (13) and the flat tube (13) and the U-groove material (3) are joined by brazing. And
The manufacturing method of the high pressure | voltage resistant oil cooler for construction machines which has the welding process in which the portal shape material (6) and the front-end | tip part of U-groove material (3) are joined by welding .
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